[SCM] proftpd-dfsg branch, squeeze, updated. debian/1.3.3a-6-5-gd4aa149
Francesco Paolo Lovergine
frankie at debian.org
Wed Mar 23 10:56:42 UTC 2011
The following commit has been merged in the squeeze branch:
commit d4aa1495e11d2fcc9422bd461d98890fbd3a74b8
Author: Francesco Paolo Lovergine <frankie at debian.org>
Date: Wed Mar 23 11:56:16 2011 +0100
Updated for NULL management patch 3624.
diff --git a/debian/patches/3624.dpatch b/debian/patches/3624.dpatch
index 9e4c492..f9d5495 100755
--- a/debian/patches/3624.dpatch
+++ b/debian/patches/3624.dpatch
@@ -6,8 +6,8 @@
@DPATCH@
diff -urNad '--exclude=CVS' '--exclude=.svn' '--exclude=.git' '--exclude=.arch' '--exclude=.hg' '--exclude=_darcs' '--exclude=.bzr' proftpd-dfsg~/contrib/mod_tls.c proftpd-dfsg/contrib/mod_tls.c
---- proftpd-dfsg~/contrib/mod_tls.c 2011-03-21 22:21:16.000000000 +0100
-+++ proftpd-dfsg/contrib/mod_tls.c 2011-03-21 22:25:15.000000000 +0100
+--- proftpd-dfsg~/contrib/mod_tls.c 2011-03-23 11:55:16.000000000 +0100
++++ proftpd-dfsg/contrib/mod_tls.c 2011-03-23 11:55:58.000000000 +0100
@@ -61,7 +61,7 @@
# include <sys/mman.h>
#endif
@@ -17,7 +17,7 @@ diff -urNad '--exclude=CVS' '--exclude=.svn' '--exclude=.git' '--exclude=.arch'
/* Make sure the version of proftpd is as necessary. */
#if PROFTPD_VERSION_NUMBER < 0x0001021001
-@@ -2758,11 +2758,29 @@
+@@ -2758,11 +2758,33 @@
/* Stash the SSL object in the pointers of the correct NetIO streams. */
if (conn == session.c) {
@@ -30,8 +30,10 @@ diff -urNad '--exclude=CVS' '--exclude=.svn' '--exclude=.git' '--exclude=.arch'
+ * in before the SSL/TLS handshake occurred (Bug#3624).
+ */
+ strm_buf = tls_ctrl_rd_nstrm->strm_buf;
-+ strm_buf->current = NULL;
-+ strm_buf->remaining = strm_buf->buflen;
++ if (strm_buf != NULL) {
++ strm_buf->current = NULL;
++ strm_buf->remaining = strm_buf->buflen;
++ }
+
} else if (conn == session.d) {
+ pr_buffer_t *strm_buf;
@@ -42,8 +44,7600 @@ diff -urNad '--exclude=CVS' '--exclude=.svn' '--exclude=.git' '--exclude=.arch'
+ * in before the SSL/TLS handshake occurred (Bug#3624).
+ */
+ strm_buf = tls_data_rd_nstrm->strm_buf;
-+ strm_buf->current = NULL;
-+ strm_buf->remaining = strm_buf->buflen;
++ if (strm_buf != NULL) {
++ strm_buf->current = NULL;
++ strm_buf->remaining = strm_buf->buflen;
++ }
}
#if OPENSSL_VERSION_NUMBER == 0x009080cfL
+diff -urNad '--exclude=CVS' '--exclude=.svn' '--exclude=.git' '--exclude=.arch' '--exclude=.hg' '--exclude=_darcs' '--exclude=.bzr' proftpd-dfsg~/contrib/mod_tls.c.orig proftpd-dfsg/contrib/mod_tls.c.orig
+--- proftpd-dfsg~/contrib/mod_tls.c.orig 1970-01-01 01:00:00.000000000 +0100
++++ proftpd-dfsg/contrib/mod_tls.c.orig 2011-03-23 11:55:36.000000000 +0100
+@@ -0,0 +1,7586 @@
++/*
++ * mod_tls - An RFC2228 SSL/TLS module for ProFTPD
++ *
++ * Copyright (c) 2000-2002 Peter 'Luna' Runestig <peter at runestig.com>
++ * Copyright (c) 2002-2010 TJ Saunders <tj at castaglia.org>
++ * All rights reserved.
++ *
++ * Redistribution and use in source and binary forms, with or without modifi-
++ * cation, are permitted provided that the following conditions are met:
++ *
++ * o Redistributions of source code must retain the above copyright notice,
++ * this list of conditions and the following disclaimer.
++ *
++ * o Redistributions in binary form must reproduce the above copyright no-
++ * tice, this list of conditions and the following disclaimer in the do-
++ * cumentation and/or other materials provided with the distribution.
++ *
++ * o The names of the contributors may not be used to endorse or promote
++ * products derived from this software without specific prior written
++ * permission.
++ *
++ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
++ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
++ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
++ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LI-
++ * ABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUEN-
++ * TIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
++ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEV-
++ * ER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABI-
++ * LITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
++ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ *
++ * --- DO NOT DELETE BELOW THIS LINE ----
++ * $Libraries: -lssl -lcrypto$
++ */
++
++#include "conf.h"
++#include "privs.h"
++#include "mod_tls.h"
++
++#ifdef PR_USE_CTRLS
++# include "mod_ctrls.h"
++#endif
++
++/* Note that the openssl/ssl.h header is already included in mod_tls.h, so
++ * we don't need to include it here.
++*/
++
++#include <openssl/evp.h>
++#include <openssl/x509v3.h>
++#include <openssl/pkcs12.h>
++#include <openssl/rand.h>
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++# include <openssl/engine.h>
++# include <openssl/ocsp.h>
++#endif
++
++#include <signal.h>
++
++#ifdef HAVE_MLOCK
++# include <sys/mman.h>
++#endif
++
++#define MOD_TLS_VERSION "mod_tls/2.4.2"
++
++/* Make sure the version of proftpd is as necessary. */
++#if PROFTPD_VERSION_NUMBER < 0x0001021001
++# error "ProFTPD 1.2.10rc1 or later required"
++#endif
++
++extern session_t session;
++extern xaset_t *server_list;
++
++/* DH parameters. These are generated using:
++ *
++ * # openssl dhparam -2|-5 512|768|1024|1536|2048 -C
++ *
++ * These should be regenerated periodically by the mod_tls maintainer.
++ * Last updated on 2008-09-07.
++ */
++
++/*
++-----BEGIN DH PARAMETERS-----
++MEYCQQD+qPGFmhNpRTRktay+Z+V1kGEknYZbxh6zktAWjqeeWJGOMwbE7EVuAWW0
++I+o1MkCDkg6MtO3NFLisMh9NJVjrAgEC
++-----END DH PARAMETERS-----
++*/
++
++static unsigned char dh512_p[] = {
++ 0xFE,0xA8,0xF1,0x85,0x9A,0x13,0x69,0x45,0x34,0x64,0xB5,0xAC,
++ 0xBE,0x67,0xE5,0x75,0x90,0x61,0x24,0x9D,0x86,0x5B,0xC6,0x1E,
++ 0xB3,0x92,0xD0,0x16,0x8E,0xA7,0x9E,0x58,0x91,0x8E,0x33,0x06,
++ 0xC4,0xEC,0x45,0x6E,0x01,0x65,0xB4,0x23,0xEA,0x35,0x32,0x40,
++ 0x83,0x92,0x0E,0x8C,0xB4,0xED,0xCD,0x14,0xB8,0xAC,0x32,0x1F,
++ 0x4D,0x25,0x58,0xEB,
++};
++
++static unsigned char dh512_g[] = {
++ 0x02,
++};
++
++static DH *get_dh512(void) {
++ DH *dh;
++
++ dh = DH_new();
++ if (dh == NULL)
++ return NULL;
++
++ dh->p = BN_bin2bn(dh512_p, sizeof(dh512_p), NULL);
++ dh->g = BN_bin2bn(dh512_g, sizeof(dh512_g), NULL);
++
++ if (dh->p == NULL ||
++ dh->g == NULL) {
++ DH_free(dh);
++ return NULL;
++ }
++
++ return dh;
++}
++
++/*
++-----BEGIN DH PARAMETERS-----
++MGYCYQD86LGZfS1NNkMtu4u+1QiV33mhjtrBljv+3TtoTMLulWgIUz0qxYdFtisC
++Isc/29WPOBn4m8hxj57x4DjkKYeYnA2poxHxPF/eQZC2AUezPRrhk1ZSJz8337DA
++vq6pv2MCAQU=
++-----END DH PARAMETERS-----
++*/
++
++static unsigned char dh768_p[] = {
++ 0xFC,0xE8,0xB1,0x99,0x7D,0x2D,0x4D,0x36,0x43,0x2D,0xBB,0x8B,
++ 0xBE,0xD5,0x08,0x95,0xDF,0x79,0xA1,0x8E,0xDA,0xC1,0x96,0x3B,
++ 0xFE,0xDD,0x3B,0x68,0x4C,0xC2,0xEE,0x95,0x68,0x08,0x53,0x3D,
++ 0x2A,0xC5,0x87,0x45,0xB6,0x2B,0x02,0x22,0xC7,0x3F,0xDB,0xD5,
++ 0x8F,0x38,0x19,0xF8,0x9B,0xC8,0x71,0x8F,0x9E,0xF1,0xE0,0x38,
++ 0xE4,0x29,0x87,0x98,0x9C,0x0D,0xA9,0xA3,0x11,0xF1,0x3C,0x5F,
++ 0xDE,0x41,0x90,0xB6,0x01,0x47,0xB3,0x3D,0x1A,0xE1,0x93,0x56,
++ 0x52,0x27,0x3F,0x37,0xDF,0xB0,0xC0,0xBE,0xAE,0xA9,0xBF,0x63,
++};
++
++static unsigned char dh768_g[] = {
++ 0x05,
++};
++
++static DH *get_dh768(void) {
++ DH *dh;
++
++ dh = DH_new();
++ if (dh == NULL)
++ return NULL;
++
++ dh->p = BN_bin2bn(dh768_p, sizeof(dh768_p), NULL);
++ dh->g = BN_bin2bn(dh768_g, sizeof(dh768_g), NULL);
++
++ if (dh->p == NULL ||
++ dh->g == NULL) {
++ DH_free(dh);
++ return NULL;
++ }
++
++ return dh;
++}
++
++/*
++-----BEGIN DH PARAMETERS-----
++MIGHAoGBAM34dKi6BP27gG9DOCuTB6Ue8uLY2t4K8le0w1yIa7a58vAnDq1CR3sl
++MIcwK4Rz2pv7MyrIg9Haf5l4kUMx4wr0ORxCBesFLqFPVBjbL+wB8mfJmYC9zq81
++02rLUgfDwHVI0dW9kwZPTiQJ0QXPI3OiYIyCR8vvebVI/Kjb5IcvAgEF
++-----END DH PARAMETERS-----
++*/
++
++static unsigned char dh1024_p[] = {
++ 0xCD,0xF8,0x74,0xA8,0xBA,0x04,0xFD,0xBB,0x80,0x6F,0x43,0x38,
++ 0x2B,0x93,0x07,0xA5,0x1E,0xF2,0xE2,0xD8,0xDA,0xDE,0x0A,0xF2,
++ 0x57,0xB4,0xC3,0x5C,0x88,0x6B,0xB6,0xB9,0xF2,0xF0,0x27,0x0E,
++ 0xAD,0x42,0x47,0x7B,0x25,0x30,0x87,0x30,0x2B,0x84,0x73,0xDA,
++ 0x9B,0xFB,0x33,0x2A,0xC8,0x83,0xD1,0xDA,0x7F,0x99,0x78,0x91,
++ 0x43,0x31,0xE3,0x0A,0xF4,0x39,0x1C,0x42,0x05,0xEB,0x05,0x2E,
++ 0xA1,0x4F,0x54,0x18,0xDB,0x2F,0xEC,0x01,0xF2,0x67,0xC9,0x99,
++ 0x80,0xBD,0xCE,0xAF,0x35,0xD3,0x6A,0xCB,0x52,0x07,0xC3,0xC0,
++ 0x75,0x48,0xD1,0xD5,0xBD,0x93,0x06,0x4F,0x4E,0x24,0x09,0xD1,
++ 0x05,0xCF,0x23,0x73,0xA2,0x60,0x8C,0x82,0x47,0xCB,0xEF,0x79,
++ 0xB5,0x48,0xFC,0xA8,0xDB,0xE4,0x87,0x2F,
++};
++
++static unsigned char dh1024_g[] = {
++ 0x05,
++};
++
++static DH *get_dh1024(void) {
++ DH *dh;
++
++ dh = DH_new();
++ if (dh == NULL)
++ return NULL;
++
++ dh->p = BN_bin2bn(dh1024_p, sizeof(dh1024_p), NULL);
++ dh->g = BN_bin2bn(dh1024_g, sizeof(dh1024_g), NULL);
++
++ if (dh->p == NULL ||
++ dh->g == NULL) {
++ DH_free(dh);
++ return NULL;
++ }
++
++ return(dh);
++}
++
++/*
++-----BEGIN DH PARAMETERS-----
++MIHHAoHBANj1DAo+95M9B8V7pS3k8UROz+gu2Huuve0PglXlEtTfSr3KF6ga3EWs
++22j97IJTkoxu0QswRjRBr64Kfk4pMTpX827oJoPc9n63xVpS47cpg/2W8ZyE9/ZK
++lgABM2z0NasOXBMaau38U8cEebHwmrCi3rSJxBpwyU+7X4QEa3pI/WGml3NTzmRo
++G95NAFZJcFLzFRX2VVf5YB4I4sVWCpRqVFL2HXB9ioauQ50DBYAjp72h182aCgWU
++WR+44B88awIBAg==
++-----END DH PARAMETERS-----
++*/
++
++static unsigned char dh1536_p[] = {
++ 0xD8,0xF5,0x0C,0x0A,0x3E,0xF7,0x93,0x3D,0x07,0xC5,0x7B,0xA5,
++ 0x2D,0xE4,0xF1,0x44,0x4E,0xCF,0xE8,0x2E,0xD8,0x7B,0xAE,0xBD,
++ 0xED,0x0F,0x82,0x55,0xE5,0x12,0xD4,0xDF,0x4A,0xBD,0xCA,0x17,
++ 0xA8,0x1A,0xDC,0x45,0xAC,0xDB,0x68,0xFD,0xEC,0x82,0x53,0x92,
++ 0x8C,0x6E,0xD1,0x0B,0x30,0x46,0x34,0x41,0xAF,0xAE,0x0A,0x7E,
++ 0x4E,0x29,0x31,0x3A,0x57,0xF3,0x6E,0xE8,0x26,0x83,0xDC,0xF6,
++ 0x7E,0xB7,0xC5,0x5A,0x52,0xE3,0xB7,0x29,0x83,0xFD,0x96,0xF1,
++ 0x9C,0x84,0xF7,0xF6,0x4A,0x96,0x00,0x01,0x33,0x6C,0xF4,0x35,
++ 0xAB,0x0E,0x5C,0x13,0x1A,0x6A,0xED,0xFC,0x53,0xC7,0x04,0x79,
++ 0xB1,0xF0,0x9A,0xB0,0xA2,0xDE,0xB4,0x89,0xC4,0x1A,0x70,0xC9,
++ 0x4F,0xBB,0x5F,0x84,0x04,0x6B,0x7A,0x48,0xFD,0x61,0xA6,0x97,
++ 0x73,0x53,0xCE,0x64,0x68,0x1B,0xDE,0x4D,0x00,0x56,0x49,0x70,
++ 0x52,0xF3,0x15,0x15,0xF6,0x55,0x57,0xF9,0x60,0x1E,0x08,0xE2,
++ 0xC5,0x56,0x0A,0x94,0x6A,0x54,0x52,0xF6,0x1D,0x70,0x7D,0x8A,
++ 0x86,0xAE,0x43,0x9D,0x03,0x05,0x80,0x23,0xA7,0xBD,0xA1,0xD7,
++ 0xCD,0x9A,0x0A,0x05,0x94,0x59,0x1F,0xB8,0xE0,0x1F,0x3C,0x6B,
++};
++
++static unsigned char dh1536_g[] = {
++ 0x02,
++};
++
++static DH *get_dh1536(void) {
++ DH *dh;
++
++ dh = DH_new();
++ if (dh == NULL)
++ return NULL;
++
++ dh->p = BN_bin2bn(dh1536_p, sizeof(dh1536_p), NULL);
++ dh->g = BN_bin2bn(dh1536_g, sizeof(dh1536_g), NULL);
++
++ if (dh->p == NULL ||
++ dh->g == NULL) {
++ DH_free(dh);
++ return NULL;
++ }
++
++ return dh;
++}
++
++/*
++-----BEGIN DH PARAMETERS-----
++MIIBCAKCAQEAtIwmelcdbGINENw+vnQSB1GRpLrX2XW+jKX2EdYDsrrui7Kr7vbi
++/qiWjvyzT0hCRjwIRc4dSnJrLDJgMit8dLCvvaamITdafpbVrnPE6jHV7AXuHdgH
++T0hT4hrywYWrhs0GhlluFNtlYoBsD3953Uf6rxxCgkhySZu+HFEKEBQSk60OWS/6
++HjIm+dH/vtN2TNWAefB/0vvGo0mTwhmqv45ZF1dzdEWkRtA3TCyVu7bpq6cseQ04
++j6m3CeC06WoLVePnEQksSS9r5aloGAftoM+BlquS4oy9HDEtO+E2y0K45Yb0FUmA
++TKHR1D+CqeQr/HWVGGQFBwPrk9MtHDna2wIBAg==
++-----END DH PARAMETERS-----
++*/
++
++static unsigned char dh2048_p[] = {
++ 0xB4,0x8C,0x26,0x7A,0x57,0x1D,0x6C,0x62,0x0D,0x10,0xDC,0x3E,
++ 0xBE,0x74,0x12,0x07,0x51,0x91,0xA4,0xBA,0xD7,0xD9,0x75,0xBE,
++ 0x8C,0xA5,0xF6,0x11,0xD6,0x03,0xB2,0xBA,0xEE,0x8B,0xB2,0xAB,
++ 0xEE,0xF6,0xE2,0xFE,0xA8,0x96,0x8E,0xFC,0xB3,0x4F,0x48,0x42,
++ 0x46,0x3C,0x08,0x45,0xCE,0x1D,0x4A,0x72,0x6B,0x2C,0x32,0x60,
++ 0x32,0x2B,0x7C,0x74,0xB0,0xAF,0xBD,0xA6,0xA6,0x21,0x37,0x5A,
++ 0x7E,0x96,0xD5,0xAE,0x73,0xC4,0xEA,0x31,0xD5,0xEC,0x05,0xEE,
++ 0x1D,0xD8,0x07,0x4F,0x48,0x53,0xE2,0x1A,0xF2,0xC1,0x85,0xAB,
++ 0x86,0xCD,0x06,0x86,0x59,0x6E,0x14,0xDB,0x65,0x62,0x80,0x6C,
++ 0x0F,0x7F,0x79,0xDD,0x47,0xFA,0xAF,0x1C,0x42,0x82,0x48,0x72,
++ 0x49,0x9B,0xBE,0x1C,0x51,0x0A,0x10,0x14,0x12,0x93,0xAD,0x0E,
++ 0x59,0x2F,0xFA,0x1E,0x32,0x26,0xF9,0xD1,0xFF,0xBE,0xD3,0x76,
++ 0x4C,0xD5,0x80,0x79,0xF0,0x7F,0xD2,0xFB,0xC6,0xA3,0x49,0x93,
++ 0xC2,0x19,0xAA,0xBF,0x8E,0x59,0x17,0x57,0x73,0x74,0x45,0xA4,
++ 0x46,0xD0,0x37,0x4C,0x2C,0x95,0xBB,0xB6,0xE9,0xAB,0xA7,0x2C,
++ 0x79,0x0D,0x38,0x8F,0xA9,0xB7,0x09,0xE0,0xB4,0xE9,0x6A,0x0B,
++ 0x55,0xE3,0xE7,0x11,0x09,0x2C,0x49,0x2F,0x6B,0xE5,0xA9,0x68,
++ 0x18,0x07,0xED,0xA0,0xCF,0x81,0x96,0xAB,0x92,0xE2,0x8C,0xBD,
++ 0x1C,0x31,0x2D,0x3B,0xE1,0x36,0xCB,0x42,0xB8,0xE5,0x86,0xF4,
++ 0x15,0x49,0x80,0x4C,0xA1,0xD1,0xD4,0x3F,0x82,0xA9,0xE4,0x2B,
++ 0xFC,0x75,0x95,0x18,0x64,0x05,0x07,0x03,0xEB,0x93,0xD3,0x2D,
++ 0x1C,0x39,0xDA,0xDB,
++};
++
++static unsigned char dh2048_g[] = {
++ 0x02,
++};
++
++static DH *get_dh2048(void) {
++ DH *dh;
++
++ dh = DH_new();
++ if (dh == NULL)
++ return NULL;
++
++ dh->p = BN_bin2bn(dh2048_p, sizeof(dh2048_p), NULL);
++ dh->g = BN_bin2bn(dh2048_g, sizeof(dh2048_g), NULL);
++
++ if (dh->p == NULL ||
++ dh->g == NULL) {
++ DH_free(dh);
++ return NULL;
++ }
++
++ return dh;
++}
++
++/* ASN1_BIT_STRING_cmp was renamed in 0.9.5 */
++#if OPENSSL_VERSION_NUMBER < 0x00905100L
++# define M_ASN1_BIT_STRING_cmp ASN1_BIT_STRING_cmp
++#endif
++
++/* From src/dirtree.c */
++extern int ServerUseReverseDNS;
++
++module tls_module;
++
++typedef struct tls_pkey_obj {
++ struct tls_pkey_obj *next;
++
++ size_t pkeysz;
++
++ char *rsa_pkey;
++ void *rsa_pkey_ptr;
++
++ char *dsa_pkey;
++ void *dsa_pkey_ptr;
++
++ /* Used for stashing the password for a PKCS12 file, which should
++ * contain a certificate. Any passphrase for the private key for that
++ * certificate should be in one of the above RSA/DSA buffers.
++ */
++ char *pkcs12_passwd;
++ void *pkcs12_passwd_ptr;
++
++ unsigned int flags;
++
++ server_rec *server;
++
++} tls_pkey_t;
++
++#define TLS_PKEY_USE_RSA 0x0100
++#define TLS_PKEY_USE_DSA 0x0200
++
++static tls_pkey_t *tls_pkey_list = NULL;
++static unsigned int tls_npkeys = 0;
++
++#define TLS_DEFAULT_CIPHER_SUITE "ALL:!ADH"
++
++/* Module variables */
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++static const char *tls_crypto_device = NULL;
++#endif
++static unsigned char tls_engine = FALSE;
++static unsigned long tls_flags = 0UL, tls_opts = 0UL;
++static tls_pkey_t *tls_pkey = NULL;
++static int tls_logfd = -1;
++static char *tls_logname = NULL;
++
++static char *tls_passphrase_provider = NULL;
++#define TLS_PASSPHRASE_TIMEOUT 10
++#define TLS_PASSPHRASE_FL_RSA_KEY 0x0001
++#define TLS_PASSPHRASE_FL_DSA_KEY 0x0002
++#define TLS_PASSPHRASE_FL_PKCS12_PASSWD 0x0004
++
++#define TLS_PROTO_SSL_V3 0x0001
++#define TLS_PROTO_TLS_V1 0x0002
++static unsigned int tls_protocol = TLS_PROTO_SSL_V3|TLS_PROTO_TLS_V1;
++
++static int tls_required_on_auth = 0;
++static int tls_required_on_ctrl = 0;
++static int tls_required_on_data = 0;
++static unsigned char *tls_authenticated = NULL;
++
++/* mod_tls session flags */
++#define TLS_SESS_ON_CTRL 0x0001
++#define TLS_SESS_ON_DATA 0x0002
++#define TLS_SESS_PBSZ_OK 0x0004
++#define TLS_SESS_TLS_REQUIRED 0x0010
++#define TLS_SESS_VERIFY_CLIENT 0x0020
++#define TLS_SESS_NO_PASSWD_NEEDED 0x0040
++#define TLS_SESS_NEED_DATA_PROT 0x0100
++#define TLS_SESS_CTRL_RENEGOTIATING 0x0200
++#define TLS_SESS_DATA_RENEGOTIATING 0x0400
++#define TLS_SESS_HAVE_CCC 0x0800
++
++/* mod_tls option flags */
++#define TLS_OPT_NO_CERT_REQUEST 0x0001
++#define TLS_OPT_VERIFY_CERT_FQDN 0x0002
++#define TLS_OPT_VERIFY_CERT_IP_ADDR 0x0004
++#define TLS_OPT_ALLOW_DOT_LOGIN 0x0008
++#define TLS_OPT_EXPORT_CERT_DATA 0x0010
++#define TLS_OPT_STD_ENV_VARS 0x0020
++#define TLS_OPT_ALLOW_PER_USER 0x0040
++#define TLS_OPT_ENABLE_DIAGS 0x0080
++#define TLS_OPT_NO_SESSION_REUSE_REQUIRED 0x0100
++#define TLS_OPT_USE_IMPLICIT_SSL 0x0200
++#define TLS_OPT_ALLOW_CLIENT_RENEGOTIATIONS 0x0400
++
++/* mod_tls cleanup flags */
++#define TLS_CLEANUP_FL_SESS_INIT 0x0001
++
++static char *tls_cipher_suite = NULL;
++static char *tls_crl_file = NULL, *tls_crl_path = NULL;
++static char *tls_dhparam_file = NULL;
++static char *tls_dsa_cert_file = NULL, *tls_dsa_key_file = NULL;
++static char *tls_pkcs12_file = NULL;
++static char *tls_rsa_cert_file = NULL, *tls_rsa_key_file = NULL;
++static char *tls_rand_file = NULL;
++
++/* Timeout given for TLS handshakes. The default is 5 minutes. */
++static unsigned int tls_handshake_timeout = 300;
++static unsigned char tls_handshake_timed_out = FALSE;
++static int tls_handshake_timer_id = -1;
++
++/* Note: 9 is the default OpenSSL depth. */
++static int tls_verify_depth = 9;
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++/* Renegotiate control channel on TLS sessions after 4 hours, by default. */
++static int tls_ctrl_renegotiate_timeout = 14400;
++
++/* Renegotiate data channel on TLS sessions after 1 gigabyte, by default. */
++static off_t tls_data_renegotiate_limit = 1024 * 1024 * 1024;
++
++/* Timeout given for renegotiations to occur before the TLS session is
++ * shutdown. The default is 30 seconds.
++ */
++static int tls_renegotiate_timeout = 30;
++
++/* Is client acceptance of a requested renegotiation required? */
++static unsigned char tls_renegotiate_required = TRUE;
++#endif
++
++static pr_netio_t *tls_ctrl_netio = NULL;
++static pr_netio_stream_t *tls_ctrl_rd_nstrm = NULL;
++static pr_netio_stream_t *tls_ctrl_wr_nstrm = NULL;
++
++static pr_netio_t *tls_data_netio = NULL;
++static pr_netio_stream_t *tls_data_rd_nstrm = NULL;
++static pr_netio_stream_t *tls_data_wr_nstrm = NULL;
++
++static tls_sess_cache_t *tls_sess_cache = NULL;
++
++/* OpenSSL variables */
++static SSL *ctrl_ssl = NULL;
++static SSL_CTX *ssl_ctx = NULL;
++static X509_STORE *tls_crl_store = NULL;
++static DH *tls_tmp_dh = NULL;
++static RSA *tls_tmp_rsa = NULL;
++
++/* SSL/TLS support functions */
++static void tls_closelog(void);
++static void tls_end_sess(SSL *, int, int);
++#define TLS_SHUTDOWN_BIDIRECTIONAL 0x0001
++
++static void tls_fatal_error(long, int);
++static const char *tls_get_errors(void);
++static char *tls_get_page(size_t, void **);
++static size_t tls_get_pagesz(void);
++static int tls_get_passphrase(server_rec *, const char *, const char *,
++ char *, size_t, int);
++
++static char *tls_get_subj_name(void);
++
++static int tls_openlog(void);
++static RSA *tls_rsa_cb(SSL *, int, int);
++static int tls_seed_prng(void);
++static void tls_setup_environ(SSL *);
++static int tls_verify_cb(int, X509_STORE_CTX *);
++static int tls_verify_crl(int, X509_STORE_CTX *);
++static int tls_verify_ocsp(int, X509_STORE_CTX *);
++static char *tls_x509_name_oneline(X509_NAME *);
++
++static int tls_readmore(int);
++static int tls_writemore(int);
++
++/* Session cache API */
++static tls_sess_cache_t *tls_sess_cache_get_cache(const char *);
++static long tls_sess_cache_get_cache_mode(void);
++static int tls_sess_cache_open(char *, long);
++static int tls_sess_cache_close(void);
++#ifdef PR_USE_CTRLS
++static int tls_sess_cache_clear(void);
++static int tls_sess_cache_remove(void);
++static int tls_sess_cache_status(pr_ctrls_t *, int);
++#endif /* PR_USE_CTRLS */
++static int tls_sess_cache_add_sess_cb(SSL *, SSL_SESSION *);
++static SSL_SESSION *tls_sess_cache_get_sess_cb(SSL *, unsigned char *, int,
++ int *);
++static void tls_sess_cache_delete_sess_cb(SSL_CTX *, SSL_SESSION *);
++
++#ifdef PR_USE_CTRLS
++static pool *tls_act_pool = NULL;
++static ctrls_acttab_t tls_acttab[];
++#endif /* PR_USE_CTRLS */
++
++static int tls_need_init_handshake = TRUE;
++
++static void tls_diags_cb(const SSL *ssl, int where, int ret) {
++ const char *str = "(unknown)";
++ int w;
++
++ pr_signals_handle();
++
++ w = where & ~SSL_ST_MASK;
++
++ if (w & SSL_ST_CONNECT) {
++ str = "connecting";
++
++ } else if (w & SSL_ST_ACCEPT) {
++ str = "accepting";
++
++ } else {
++ int ssl_state;
++
++ ssl_state = SSL_get_state(ssl);
++ if (ssl_state == SSL_ST_OK) {
++ str = "ok";
++ }
++ }
++
++ if (where & SSL_CB_ACCEPT_LOOP) {
++ int ssl_state;
++
++ ssl_state = SSL_get_state(ssl);
++
++ if (ssl_state == SSL3_ST_SR_CLNT_HELLO_A ||
++ ssl_state == SSL23_ST_SR_CLNT_HELLO_A) {
++
++ /* If we have already completed our initial handshake, then this might
++ * a session renegotiation.
++ */
++ if (!tls_need_init_handshake) {
++
++ /* Yes, this is indeed a session renegotiation. If it's a
++ * renegotiation that we requested, allow it. If it is from a
++ * data connection, allow it. Otherwise, it's a client-initiated
++ * renegotiation, and we probably don't want to allow it.
++ */
++
++ if (ssl == ctrl_ssl &&
++ !(tls_flags & TLS_SESS_CTRL_RENEGOTIATING) &&
++ !(tls_flags & TLS_SESS_DATA_RENEGOTIATING)) {
++
++ if (!(tls_opts & TLS_OPT_ALLOW_CLIENT_RENEGOTIATIONS)) {
++ tls_log("warning: client-initiated session renegotiation "
++ "detected, aborting connection");
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION
++ ": client-initiated session renegotiation detected, "
++ "aborting connection");
++
++ tls_end_sess(ctrl_ssl, PR_NETIO_STRM_CTRL, 0);
++ tls_ctrl_rd_nstrm->strm_data = tls_ctrl_wr_nstrm->strm_data =
++ ctrl_ssl = NULL;
++
++ end_login(1);
++ }
++ }
++ }
++
++#if OPENSSL_VERSION_NUMBER >= 0x009080cfL
++ } else if (ssl_state & SSL_ST_RENEGOTIATE) {
++ if (!tls_need_init_handshake) {
++
++ if (ssl == ctrl_ssl &&
++ !(tls_flags & TLS_SESS_CTRL_RENEGOTIATING) &&
++ !(tls_flags & TLS_SESS_DATA_RENEGOTIATING)) {
++
++ /* In OpenSSL-0.9.8l and later, SSL session renegotiations are
++ * automatically disabled. Thus if the admin has not explicitly
++ * configured support for client-initiated renegotations via the
++ * AllowClientRenegotiations TLSOption, then we need to disconnect
++ * the client here. Otherwise, the client would hang (up to the
++ * TLSTimeoutHandshake limit). Since we know, right now, that the
++ * handshake won't succeed, just drop the connection.
++ */
++
++ if (!(tls_opts & TLS_OPT_ALLOW_CLIENT_RENEGOTIATIONS)) {
++ tls_log("warning: client-initiated session renegotiation detected, "
++ "aborting connection");
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION
++ ": client-initiated session renegotiation detected, "
++ "aborting connection");
++
++ tls_end_sess(ctrl_ssl, PR_NETIO_STRM_CTRL, 0);
++ tls_ctrl_rd_nstrm->strm_data = tls_ctrl_wr_nstrm->strm_data =
++ ctrl_ssl = NULL;
++
++ end_login(1);
++ }
++ }
++ }
++#endif
++ }
++
++ if (tls_opts & TLS_OPT_ENABLE_DIAGS) {
++ tls_log("[info] %s: %s", str, SSL_state_string_long(ssl));
++ }
++
++ } else if (where & SSL_CB_HANDSHAKE_DONE) {
++ if (!tls_need_init_handshake) {
++ /* If this is an accepted renegotiation, log the possibly-changed
++ * ciphersuite et al.
++ */
++ tls_log("%s renegotiation accepted, using cipher %s (%d bits)",
++ SSL_get_cipher_version(ssl), SSL_get_cipher_name(ssl),
++ SSL_get_cipher_bits(ssl, NULL));
++ }
++
++ tls_need_init_handshake = FALSE;
++
++ /* Clear the flags set for server-requested renegotiations. */
++ if (tls_flags & TLS_SESS_CTRL_RENEGOTIATING) {
++ tls_flags &= ~TLS_SESS_CTRL_RENEGOTIATING;
++ }
++
++ if (tls_flags & ~TLS_SESS_DATA_RENEGOTIATING) {
++ tls_flags &= ~TLS_SESS_DATA_RENEGOTIATING;
++ }
++
++ if (tls_opts & TLS_OPT_ENABLE_DIAGS) {
++ tls_log("[info] %s: %s", str, SSL_state_string_long(ssl));
++ }
++
++ } else if (where & SSL_CB_LOOP) {
++ if (tls_opts & TLS_OPT_ENABLE_DIAGS) {
++ tls_log("[info] %s: %s", str, SSL_state_string_long(ssl));
++ }
++
++ } else if (where & SSL_CB_ALERT) {
++ if (tls_opts & TLS_OPT_ENABLE_DIAGS) {
++ str = (where & SSL_CB_READ) ? "reading" : "writing";
++ tls_log("[info] %s: SSL/TLS alert %s: %s", str,
++ SSL_alert_type_string_long(ret), SSL_alert_desc_string_long(ret));
++ }
++
++ } else if (where & SSL_CB_EXIT) {
++ if (tls_opts & TLS_OPT_ENABLE_DIAGS) {
++ if (ret == 0) {
++ tls_log("[info] %s: failed in %s: %s", str,
++ SSL_state_string_long(ssl), tls_get_errors());
++
++ } else if (ret < 0 &&
++ errno != 0 &&
++ errno != EAGAIN) {
++ /* Ignore EAGAIN errors */
++ tls_log("[info] %s: error in %s (errno %d: %s)",
++ str, SSL_state_string_long(ssl), errno, strerror(errno));
++ }
++ }
++ }
++}
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++static void tls_msg_cb(int io_flag, int version, int content_type,
++ const void *buf, size_t buflen, SSL *ssl, void *arg) {
++ char *action_str = NULL;
++ char *version_str = NULL;
++ char *bytes_str = buflen != 1 ? "bytes" : "byte";
++
++ if (io_flag == 0) {
++ action_str = "received";
++
++ } else if (io_flag == 1) {
++ action_str = "sent";
++ }
++
++ switch (version) {
++ case SSL2_VERSION:
++ version_str = "SSLv2";
++ break;
++
++ case SSL3_VERSION:
++ version_str = "SSLv3";
++ break;
++
++ case TLS1_VERSION:
++ version_str = "TLSv1";
++ break;
++ }
++
++ if (version == SSL3_VERSION ||
++ version == TLS1_VERSION) {
++
++ switch (content_type) {
++ case 20:
++ /* ChangeCipherSpec message */
++ tls_log("[msg] %s %s ChangeCipherSpec message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 21: {
++ /* Alert messages */
++ if (buflen == 2) {
++ char *severity_str = NULL;
++
++ /* Peek naughtily into the buffer. */
++ switch (((const unsigned char *) buf)[0]) {
++ case 1:
++ severity_str = "warning";
++ break;
++
++ case 2:
++ severity_str = "fatal";
++ break;
++ }
++
++ switch (((const unsigned char *) buf)[1]) {
++ case 0:
++ tls_log("[msg] %s %s %s 'close_notify' Alert message (%u %s)",
++ action_str, version_str, severity_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 10:
++ tls_log("[msg] %s %s %s 'unexpected_message' Alert message "
++ "(%u %s)", action_str, version_str, severity_str,
++ (unsigned int) buflen, bytes_str);
++ break;
++
++ case 20:
++ tls_log("[msg] %s %s %s 'bad_record_mac' Alert message (%u %s)",
++ action_str, version_str, severity_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 21:
++ tls_log("[msg] %s %s %s 'decryption_failed' Alert message "
++ "(%u %s)", action_str, version_str, severity_str,
++ (unsigned int) buflen, bytes_str);
++ break;
++
++ case 22:
++ tls_log("[msg] %s %s %s 'record_overflow' Alert message (%u %s)",
++ action_str, version_str, severity_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 30:
++ tls_log("[msg] %s %s %s 'decompression_failure' Alert message "
++ "(%u %s)", action_str, version_str, severity_str,
++ (unsigned int) buflen, bytes_str);
++ break;
++
++ case 40:
++ tls_log("[msg] %s %s %s 'handshake_failure' Alert message "
++ "(%u %s)", action_str, version_str, severity_str,
++ (unsigned int) buflen, bytes_str);
++ break;
++ }
++
++ } else {
++ tls_log("[msg] %s %s Alert message, unknown type (%u %s)", action_str,
++ version_str, (unsigned int) buflen, bytes_str);
++ }
++
++ break;
++ }
++
++ case 22: {
++ /* Handshake messages */
++ if (buflen > 0) {
++ /* Peek naughtily into the buffer. */
++ switch (((const unsigned char *) buf)[0]) {
++ case 0:
++ tls_log("[msg] %s %s 'HelloRequest' Handshake message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 1:
++ tls_log("[msg] %s %s 'ClientHello' Handshake message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 2:
++ tls_log("[msg] %s %s 'ServerHello' Handshake message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 11:
++ tls_log("[msg] %s %s 'Certificate' Handshake message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 12:
++ tls_log("[msg] %s %s 'ServerKeyExchange' Handshake message "
++ "(%u %s)", action_str, version_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 13:
++ tls_log("[msg] %s %s 'CertificateRequest' Handshake message "
++ "(%u %s)", action_str, version_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 14:
++ tls_log("[msg] %s %s 'ServerHelloDone' Handshake message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 15:
++ tls_log("[msg] %s %s 'CertificateVerify' Handshake message "
++ "(%u %s)", action_str, version_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 16:
++ tls_log("[msg] %s %s 'ClientKeyExchange' Handshake message "
++ "(%u %s)", action_str, version_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 20:
++ tls_log("[msg] %s %s 'Finished' Handshake message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++ }
++
++ } else {
++ tls_log("[msg] %s %s Handshake message, unknown type (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ }
++
++ break;
++ }
++ }
++
++ } else if (version == SSL2_VERSION) {
++ /* SSLv2 message. Ideally we wouldn't get these, but sometimes badly
++ * behaving FTPS clients send them.
++ */
++
++ if (buflen > 0) {
++ /* Peek naughtily into the buffer. */
++
++ switch (((const unsigned char *) buf)[0]) {
++ case 0: {
++ /* Error */
++ if (buflen > 3) {
++ unsigned err_code = (((const unsigned char *) buf)[1] << 8) +
++ ((const unsigned char *) buf)[2];
++
++ switch (err_code) {
++ case 0x0001:
++ tls_log("[msg] %s %s 'NO-CIPHER-ERROR' Error message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 0x0002:
++ tls_log("[msg] %s %s 'NO-CERTIFICATE-ERROR' Error message "
++ "(%u %s)", action_str, version_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 0x0004:
++ tls_log("[msg] %s %s 'BAD-CERTIFICATE-ERROR' Error message "
++ "(%u %s)", action_str, version_str, (unsigned int) buflen,
++ bytes_str);
++ break;
++
++ case 0x0006:
++ tls_log("[msg] %s %s 'UNSUPPORTED-CERTIFICATE-TYPE-ERROR' "
++ "Error message (%u %s)", action_str, version_str,
++ (unsigned int) buflen, bytes_str);
++ break;
++ }
++
++ } else {
++ tls_log("[msg] %s %s Error message, unknown type (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ }
++ break;
++ }
++
++ case 1:
++ tls_log("[msg] %s %s 'CLIENT-HELLO' message (%u %s)", action_str,
++ version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 2:
++ tls_log("[msg] %s %s 'CLIENT-MASTER-KEY' message (%u %s)", action_str,
++ version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 3:
++ tls_log("[msg] %s %s 'CLIENT-FINISHED' message (%u %s)", action_str,
++ version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 4:
++ tls_log("[msg] %s %s 'SERVER-HELLO' message (%u %s)", action_str,
++ version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 5:
++ tls_log("[msg] %s %s 'SERVER-VERIFY' message (%u %s)", action_str,
++ version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 6:
++ tls_log("[msg] %s %s 'SERVER-FINISHED' message (%u %s)", action_str,
++ version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 7:
++ tls_log("[msg] %s %s 'REQUEST-CERTIFICATE' message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++
++ case 8:
++ tls_log("[msg] %s %s 'CLIENT-CERTIFICATE' message (%u %s)",
++ action_str, version_str, (unsigned int) buflen, bytes_str);
++ break;
++ }
++
++ } else {
++ tls_log("[msg] %s %s message (%u %s)", action_str, version_str,
++ (unsigned int) buflen, bytes_str);
++ }
++
++ } else {
++ /* This case might indicate an issue with OpenSSL itself; the version
++ * given to the msg_callback function was not initialized, or not set to
++ * one of the recognized SSL/TLS versions. Weird.
++ */
++
++ tls_log("[msg] %s message of unknown version (%d) (%u %s)", action_str,
++ version, (unsigned int) buflen, bytes_str);
++ }
++
++}
++#endif
++
++static const char *get_printable_subjaltname(pool *p, const char *data,
++ size_t datalen) {
++ register unsigned int i;
++ char *ptr, *res;
++ size_t reslen = 0;
++
++ /* First, calculate the length of the resulting printable string we'll
++ * be generating.
++ */
++
++ for (i = 0; i < datalen; i++) {
++ if (isprint((int) data[i])) {
++ reslen++;
++
++ } else {
++ reslen += 4;
++ }
++ }
++
++ /* Leave one space in the allocated string for the terminating NUL. */
++ ptr = res = pcalloc(p, reslen + 1);
++
++ for (i = 0; i < datalen; i++) {
++ if (isprint((int) data[i])) {
++ *(ptr++) = data[i];
++
++ } else {
++ snprintf(ptr, reslen - (ptr - res), "\\x%02x", data[i]);
++ ptr += 4;
++ }
++ }
++
++ return res;
++}
++
++static unsigned char tls_check_client_cert(SSL *ssl, conn_t *conn) {
++ X509 *cert = NULL;
++ STACK_OF(GENERAL_NAME) *sk_alt_names;
++ unsigned char ok = FALSE, have_dns_ext = FALSE, have_ipaddr_ext = FALSE;
++
++ /* Only perform these more stringent checks if asked to verify clients. */
++ if (!(tls_flags & TLS_SESS_VERIFY_CLIENT))
++ return TRUE;
++
++ /* Only perform these checks is configured to do so. */
++ if (!(tls_opts & TLS_OPT_VERIFY_CERT_FQDN) &&
++ !(tls_opts & TLS_OPT_VERIFY_CERT_IP_ADDR))
++ return TRUE;
++
++ /* First, check the subjectAltName X509v3 extensions, as is proper, for
++ * the IP address and FQDN. If enough people clamor for backward
++ * compatibility, I'll amend this to check commonName later. Otherwise,
++ * for now, only look in the extensions.
++ */
++
++ /* Note: this should _never_ return NULL in this case. */
++ cert = SSL_get_peer_certificate(ssl);
++
++ sk_alt_names = X509_get_ext_d2i(cert, NID_subject_alt_name, NULL, NULL);
++ if (sk_alt_names) {
++ register unsigned int i;
++ int nnames = sk_GENERAL_NAME_num(sk_alt_names);
++
++ for (i = 0; i < nnames; i++) {
++ GENERAL_NAME *name = sk_GENERAL_NAME_value(sk_alt_names, i);
++
++ /* Only interested in the DNS and IP address types right now. */
++ switch (name->type) {
++ case GEN_DNS:
++ if (tls_opts & TLS_OPT_VERIFY_CERT_FQDN) {
++ const char *cert_dns_name = (const char *) name->d.ia5->data;
++ have_dns_ext = TRUE;
++
++ /* Check for subjectAltName values which contain embedded
++ * NULs. This can cause verification problems (spoofing),
++ * e.g. if the string is "www.goodguy.com\0www.badguy.com"; the
++ * use of strcmp() only checks "www.goodguy.com".
++ */
++
++ if ((size_t) name->d.ia5->length != strlen(cert_dns_name)) {
++ tls_log("%s", "client cert dNSName contains embedded NULs, "
++ "rejecting as possible spoof attempt");
++ tls_log("suspicious dNSName value: '%s'",
++ get_printable_subjaltname(conn->pool,
++ (const char *) name->d.ia5->data,
++ (size_t) name->d.ia5->length));
++
++ GENERAL_NAME_free(name);
++ sk_GENERAL_NAME_free(sk_alt_names);
++ X509_free(cert);
++ return FALSE;
++
++ } else {
++ if (strcmp(cert_dns_name, conn->remote_name) != 0) {
++ tls_log("client cert dNSName value '%s' != client FQDN '%s'",
++ cert_dns_name, conn->remote_name);
++
++ GENERAL_NAME_free(name);
++ sk_GENERAL_NAME_free(sk_alt_names);
++ X509_free(cert);
++ return FALSE;
++ }
++ }
++
++ tls_log("%s", "client cert dNSName matches client FQDN");
++ ok = TRUE;
++ continue;
++ }
++ break;
++
++ case GEN_IPADD:
++ if (tls_opts & TLS_OPT_VERIFY_CERT_IP_ADDR) {
++ char cert_ipstr[INET_ADDRSTRLEN + 1] = {'\0'};
++ const char *cert_ipaddr = (const char *) name->d.ia5->data;
++
++ /* Note: OpenSSL doesn't support IPv6 addresses in the
++ * ipAddress name yet.
++ */
++ memset(cert_ipstr, '\0', sizeof(cert_ipstr));
++ snprintf(cert_ipstr, sizeof(cert_ipstr) - 1, "%u.%u.%u.%u",
++ cert_ipaddr[0], cert_ipaddr[1], cert_ipaddr[2], cert_ipaddr[3]);
++ have_ipaddr_ext = TRUE;
++
++ if (strcmp(cert_ipstr, pr_netaddr_get_ipstr(conn->remote_addr))) {
++ tls_log("client cert iPAddress value '%s' != client IP '%s'",
++ cert_ipstr, pr_netaddr_get_ipstr(conn->remote_addr));
++
++ GENERAL_NAME_free(name);
++ sk_GENERAL_NAME_free(sk_alt_names);
++ X509_free(cert);
++ return FALSE;
++ }
++
++ tls_log("%s", "client cert iPAddress matches client IP");
++ ok = TRUE;
++ continue;
++ }
++ break;
++
++ default:
++ break;
++ }
++
++ GENERAL_NAME_free(name);
++ }
++
++ sk_GENERAL_NAME_free(sk_alt_names);
++ }
++
++ if ((tls_opts & TLS_OPT_VERIFY_CERT_FQDN) && !have_dns_ext)
++ tls_log("%s", "client cert missing required X509v3 subjectAltName dNSName");
++
++ if ((tls_opts & TLS_OPT_VERIFY_CERT_IP_ADDR) && !have_ipaddr_ext)
++ tls_log("%s", "client cert missing required X509v3 subjectAltName iPAddress");
++
++ X509_free(cert);
++
++ if (!ok)
++ return FALSE;
++
++ return TRUE;
++}
++
++struct tls_pkey_data {
++ server_rec *s;
++ int flags;
++ char *buf;
++ size_t buflen, bufsz;
++ const char *prompt;
++};
++
++static void tls_prepare_provider_fds(int stdout_fd, int stderr_fd) {
++ unsigned long nfiles = 0;
++ register unsigned int i = 0;
++ struct rlimit rlim;
++
++ if (stdout_fd != STDOUT_FILENO) {
++ if (dup2(stdout_fd, STDOUT_FILENO) < 0)
++ tls_log("error duping fd %d to stdout: %s", stdout_fd, strerror(errno));
++
++ close(stdout_fd);
++ }
++
++ if (stderr_fd != STDERR_FILENO) {
++ if (dup2(stderr_fd, STDERR_FILENO) < 0)
++ tls_log("error duping fd %d to stderr: %s", stderr_fd, strerror(errno));
++
++ close(stderr_fd);
++ }
++
++ /* Make sure not to pass on open file descriptors. For stdout and stderr,
++ * we dup some pipes, so that we can capture what the command may write
++ * to stdout or stderr. The stderr output will be logged to the TLSLog.
++ *
++ * First, use getrlimit() to obtain the maximum number of open files
++ * for this process -- then close that number.
++ */
++#if defined(RLIMIT_NOFILE) || defined(RLIMIT_OFILE)
++# if defined(RLIMIT_NOFILE)
++ if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
++# elif defined(RLIMIT_OFILE)
++ if (getrlimit(RLIMIT_OFILE, &rlim) < 0) {
++# endif
++ tls_log("getrlimit error: %s", strerror(errno));
++
++ /* Pick some arbitrary high number. */
++ nfiles = 255;
++
++ } else
++ nfiles = rlim.rlim_max;
++#else /* no RLIMIT_NOFILE or RLIMIT_OFILE */
++ nfiles = 255;
++#endif
++
++ if (nfiles > 255)
++ nfiles = 255;
++
++ /* Close the "non-standard" file descriptors. */
++ for (i = 3; i < nfiles; i++)
++ (void) close(i);
++
++ return;
++}
++
++static void tls_prepare_provider_pipes(int *stdout_pipe, int *stderr_pipe) {
++ if (pipe(stdout_pipe) < 0) {
++ tls_log("error opening stdout pipe: %s", strerror(errno));
++ stdout_pipe[0] = -1;
++ stdout_pipe[1] = STDOUT_FILENO;
++
++ } else {
++ if (fcntl(stdout_pipe[0], F_SETFD, FD_CLOEXEC) < 0)
++ tls_log("error setting close-on-exec flag on stdout pipe read fd: %s",
++ strerror(errno));
++
++ if (fcntl(stdout_pipe[1], F_SETFD, 0) < 0)
++ tls_log("error setting close-on-exec flag on stdout pipe write fd: %s",
++ strerror(errno));
++ }
++
++ if (pipe(stderr_pipe) < 0) {
++ tls_log("error opening stderr pipe: %s", strerror(errno));
++ stderr_pipe[0] = -1;
++ stderr_pipe[1] = STDERR_FILENO;
++
++ } else {
++ if (fcntl(stderr_pipe[0], F_SETFD, FD_CLOEXEC) < 0)
++ tls_log("error setting close-on-exec flag on stderr pipe read fd: %s",
++ strerror(errno));
++
++ if (fcntl(stderr_pipe[1], F_SETFD, 0) < 0)
++ tls_log("error setting close-on-exec flag on stderr pipe write fd: %s",
++ strerror(errno));
++ }
++}
++
++static int tls_exec_passphrase_provider(server_rec *s, char *buf, int buflen,
++ int flags) {
++ pid_t pid;
++ int status;
++ int stdout_pipe[2], stderr_pipe[2];
++
++ struct sigaction sa_ignore, sa_intr, sa_quit;
++ sigset_t set_chldmask, set_save;
++
++ /* Prepare signal dispositions. */
++ sa_ignore.sa_handler = SIG_IGN;
++ sigemptyset(&sa_ignore.sa_mask);
++ sa_ignore.sa_flags = 0;
++
++ if (sigaction(SIGINT, &sa_ignore, &sa_intr) < 0)
++ return -1;
++
++ if (sigaction(SIGQUIT, &sa_ignore, &sa_quit) < 0)
++ return -1;
++
++ sigemptyset(&set_chldmask);
++ sigaddset(&set_chldmask, SIGCHLD);
++
++ if (sigprocmask(SIG_BLOCK, &set_chldmask, &set_save) < 0)
++ return -1;
++
++ tls_prepare_provider_pipes(stdout_pipe, stderr_pipe);
++
++ pid = fork();
++ if (pid < 0) {
++ pr_log_pri(PR_LOG_ERR, MOD_TLS_VERSION ": error: unable to fork: %s",
++ strerror(errno));
++ status = -1;
++
++ } else if (pid == 0) {
++ char nbuf[32];
++ pool *tmp_pool;
++ char *stdin_argv[4];
++
++ /* Child process */
++
++ /* Note: there is no need to clean up this temporary pool, as we've
++ * forked. If the exec call succeeds, this child process will exit
++ * normally, and its process space recovered by the OS. If the exec
++ * call fails, we still exit, and the process space is recovered by
++ * the OS. Either way, the memory will be cleaned up without need for
++ * us to do it explicitly (unless one wanted to be pedantic about it,
++ * of course).
++ */
++ tmp_pool = make_sub_pool(s->pool);
++
++ /* Restore previous signal actions. */
++ sigaction(SIGINT, &sa_intr, NULL);
++ sigaction(SIGQUIT, &sa_quit, NULL);
++ sigprocmask(SIG_SETMASK, &set_save, NULL);
++
++ stdin_argv[0] = pstrdup(tmp_pool, tls_passphrase_provider);
++
++ memset(nbuf, '\0', sizeof(nbuf));
++ snprintf(nbuf, sizeof(nbuf)-1, "%u", (unsigned int) s->ServerPort);
++ nbuf[sizeof(nbuf)-1] = '\0';
++ stdin_argv[1] = pstrcat(tmp_pool, s->ServerName, ":", nbuf, NULL);
++
++ if (flags & TLS_PASSPHRASE_FL_RSA_KEY) {
++ stdin_argv[2] = pstrdup(tmp_pool, "RSA");
++
++ } else if (flags & TLS_PASSPHRASE_FL_DSA_KEY) {
++ stdin_argv[2] = pstrdup(tmp_pool, "DSA");
++
++ } else if (flags & TLS_PASSPHRASE_FL_PKCS12_PASSWD) {
++ stdin_argv[2] = pstrdup(tmp_pool, "PKCS12");
++ }
++
++ stdin_argv[3] = NULL;
++
++ PRIVS_ROOT
++
++ pr_log_debug(DEBUG6, MOD_TLS_VERSION
++ ": executing '%s' with uid %lu (euid %lu), gid %lu (egid %lu)",
++ tls_passphrase_provider,
++ (unsigned long) getuid(), (unsigned long) geteuid(),
++ (unsigned long) getgid(), (unsigned long) getegid());
++
++ /* Prepare the file descriptors that the process will inherit. */
++ tls_prepare_provider_fds(stdout_pipe[1], stderr_pipe[1]);
++
++ errno = 0;
++ execv(tls_passphrase_provider, stdin_argv);
++
++ /* Since all previous file descriptors (including those for log files)
++ * have been closed, and root privs have been revoked, there's little
++ * chance of directing a message of execv() failure to proftpd's log
++ * files. execv() only returns if there's an error; the only way we
++ * can signal this to the waiting parent process is to exit with a
++ * non-zero value (the value of errno will do nicely).
++ */
++
++ exit(errno);
++
++ } else {
++ int res;
++ int maxfd, fds, send_sigterm = 1;
++ fd_set readfds;
++ time_t start_time = time(NULL);
++ struct timeval tv;
++
++ /* Parent process */
++
++ close(stdout_pipe[1]);
++ close(stderr_pipe[1]);
++
++ maxfd = (stderr_pipe[0] > stdout_pipe[0]) ?
++ stderr_pipe[0] : stdout_pipe[0];
++
++ res = waitpid(pid, &status, WNOHANG);
++ while (res <= 0) {
++ if (res < 0) {
++ if (errno != EINTR) {
++ pr_log_debug(DEBUG2, MOD_TLS_VERSION
++ ": passphrase provider error: unable to wait for pid %u: %s",
++ (unsigned int) pid, strerror(errno));
++ status = -1;
++ break;
++
++ } else
++ pr_signals_handle();
++ }
++
++ /* Check the time elapsed since we started. */
++ if ((time(NULL) - start_time) > TLS_PASSPHRASE_TIMEOUT) {
++
++ /* Send TERM, the first time, to be polite. */
++ if (send_sigterm) {
++ send_sigterm = 0;
++ pr_log_debug(DEBUG6, MOD_TLS_VERSION
++ ": '%s' has exceeded the timeout (%lu seconds), sending "
++ "SIGTERM (signal %d)", tls_passphrase_provider,
++ (unsigned long) TLS_PASSPHRASE_TIMEOUT, SIGTERM);
++ kill(pid, SIGTERM);
++
++ } else {
++ /* The child is still around? Terminate with extreme prejudice. */
++ pr_log_debug(DEBUG6, MOD_TLS_VERSION
++ ": '%s' has exceeded the timeout (%lu seconds), sending "
++ "SIGKILL (signal %d)", tls_passphrase_provider,
++ (unsigned long) TLS_PASSPHRASE_TIMEOUT, SIGKILL);
++ kill(pid, SIGKILL);
++ }
++ }
++
++ /* Select on the pipe read fds, to see if the child has anything
++ * to tell us.
++ */
++ FD_ZERO(&readfds);
++
++ FD_SET(stdout_pipe[0], &readfds);
++ FD_SET(stderr_pipe[0], &readfds);
++
++ /* Note: this delay should be configurable somehow. */
++ tv.tv_sec = 2L;
++ tv.tv_usec = 0L;
++
++ fds = select(maxfd + 1, &readfds, NULL, NULL, &tv);
++
++ if (fds == -1 &&
++ errno == EINTR)
++ pr_signals_handle();
++
++ if (fds > 0) {
++ /* The child sent us something. How thoughtful. */
++
++ if (FD_ISSET(stdout_pipe[0], &readfds)) {
++ res = read(stdout_pipe[0], buf, buflen);
++ if (res > 0) {
++ while (res && (buf[res-1] == '\r' || buf[res-1] == '\n'))
++ res--;
++ buf[res] = '\0';
++
++ } else if (res < 0){
++ pr_log_debug(DEBUG2, MOD_TLS_VERSION
++ ": error reading stdout from '%s': %s",
++ tls_passphrase_provider, strerror(errno));
++ }
++ }
++
++ if (FD_ISSET(stderr_pipe[0], &readfds)) {
++ int stderrlen;
++ char stderrbuf[PIPE_BUF];
++
++ memset(stderrbuf, '\0', sizeof(stderrbuf));
++ stderrlen = read(stderr_pipe[0], stderrbuf, sizeof(stderrbuf)-1);
++ if (stderrlen > 0) {
++ while (stderrlen &&
++ (stderrbuf[stderrlen-1] == '\r' ||
++ stderrbuf[stderrlen-1] == '\n'))
++ stderrlen--;
++ stderrbuf[stderrlen] = '\0';
++
++ pr_log_debug(DEBUG5, MOD_TLS_VERSION
++ ": stderr from '%s': %s", tls_passphrase_provider,
++ stderrbuf);
++
++ } else if (res < 0) {
++ pr_log_debug(DEBUG2, MOD_TLS_VERSION
++ ": error reading stderr from '%s': %s",
++ tls_passphrase_provider, strerror(errno));
++ }
++ }
++ }
++
++ res = waitpid(pid, &status, WNOHANG);
++ }
++ }
++
++ /* Restore the previous signal actions. */
++ if (sigaction(SIGINT, &sa_intr, NULL) < 0)
++ return -1;
++
++ if (sigaction(SIGQUIT, &sa_quit, NULL) < 0)
++ return -1;
++
++ if (sigprocmask(SIG_SETMASK, &set_save, NULL) < 0)
++ return -1;
++
++ if (WIFSIGNALED(status)) {
++ pr_log_debug(DEBUG2, MOD_TLS_VERSION
++ ": '%s' died from signal %d", tls_passphrase_provider,
++ WTERMSIG(status));
++ errno = EPERM;
++ return -1;
++ }
++
++ return 0;
++}
++
++static int tls_passphrase_cb(char *buf, int buflen, int rwflag, void *d) {
++ static int need_banner = TRUE;
++ struct tls_pkey_data *pdata = d;
++
++ if (!tls_passphrase_provider) {
++ register unsigned int attempt;
++ int pwlen = 0;
++
++ tls_log("requesting passphrase from admin");
++
++ /* Similar to Apache's mod_ssl, we want to be nice, and display an
++ * informative message to the proftpd admin, telling them for what
++ * server they are being requested to provide a passphrase.
++ */
++
++ if (need_banner) {
++ fprintf(stderr, "\nPlease provide passphrases for these encrypted certificate keys:\n");
++ need_banner = FALSE;
++ }
++
++ /* You get three attempts at entering the passphrase correctly. */
++ for (attempt = 0; attempt < 3; attempt++) {
++ int res;
++
++ /* Always handle signals in a loop. */
++ pr_signals_handle();
++
++ res = EVP_read_pw_string(buf, buflen, pdata->prompt, TRUE);
++
++ /* A return value of zero from EVP_read_pw_string() means success; -1
++ * means a system error occurred, and 1 means user interaction problems.
++ */
++ if (res != 0) {
++ fprintf(stderr, "\nPassphrases do not match. Please try again.\n");
++ continue;
++ }
++
++ pwlen = strlen(buf);
++ if (pwlen < 1) {
++ fprintf(stderr, "Error: passphrase must be at least one character\n");
++
++ } else {
++ sstrncpy(pdata->buf, buf, pdata->bufsz);
++ pdata->buflen = pwlen;
++
++ return pwlen;
++ }
++ }
++
++ } else {
++ tls_log("requesting passphrase from '%s'", tls_passphrase_provider);
++
++ if (tls_exec_passphrase_provider(pdata->s, buf, buflen, pdata->flags) < 0) {
++ tls_log("error obtaining passphrase from '%s': %s",
++ tls_passphrase_provider, strerror(errno));
++
++ } else {
++ sstrncpy(pdata->buf, buf, pdata->bufsz);
++ pdata->buflen = strlen(buf);
++
++ return pdata->buflen;
++ }
++ }
++
++#if OPENSSL_VERSION_NUMBER < 0x00908001
++ PEMerr(PEM_F_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
++#else
++ PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
++#endif
++
++ pr_memscrub(buf, buflen);
++ return -1;
++}
++
++static int prompt_fd = -1;
++
++static void set_prompt_fds(void) {
++
++ /* Reconnect stderr to the term because proftpd connects stderr, earlier,
++ * to the general stderr logfile.
++ */
++ prompt_fd = open("/dev/null", O_WRONLY);
++ if (prompt_fd == -1)
++ /* This is an arbitrary, meaningless placeholder number. */
++ prompt_fd = 76;
++
++ dup2(STDERR_FILENO, prompt_fd);
++ dup2(STDOUT_FILENO, STDERR_FILENO);
++}
++
++static void restore_prompt_fds(void) {
++ dup2(prompt_fd, STDERR_FILENO);
++ close(prompt_fd);
++ prompt_fd = -1;
++}
++
++static int tls_get_pkcs12_passwd(server_rec *s, FILE *fp, const char *prompt,
++ char *buf, size_t bufsz, int flags, struct tls_pkey_data *pdata) {
++ EVP_PKEY *pkey = NULL;
++ X509 *cert = NULL;
++ PKCS12 *p12 = NULL;
++ char *passwd = NULL;
++ int res, ok = FALSE;
++
++ p12 = d2i_PKCS12_fp(fp, NULL);
++ if (p12 != NULL) {
++
++ /* Check if a password is needed. */
++ res = PKCS12_verify_mac(p12, NULL, 0);
++ if (res == 1) {
++ passwd = NULL;
++
++ } else if (res == 0) {
++ res = PKCS12_verify_mac(p12, "", 0);
++ if (res == 1) {
++ passwd = "";
++ }
++ }
++
++ if (res == 0) {
++ register unsigned int attempt;
++
++ /* This PKCS12 file is password-protected; need to get the password
++ * from the admin.
++ */
++ for (attempt = 0; attempt < 3; attempt++) {
++ int len = -1;
++
++ /* Always handle signals in a loop. */
++ pr_signals_handle();
++
++ len = tls_passphrase_cb(buf, bufsz, 0, pdata);
++ if (len > 0) {
++ res = PKCS12_verify_mac(p12, buf, -1);
++ if (res == 1) {
++#if OPENSSL_VERSION_NUMBER >= 0x000905000L
++ /* Use the obtained password as additional entropy, ostensibly
++ * unknown to attackers who may be watching the network, for
++ * OpenSSL's PRNG.
++ *
++ * Human language gives about 2-3 bits of entropy per byte
++ * (as per RFC1750).
++ */
++ RAND_add(buf, pdata->buflen, pdata->buflen * 0.25);
++#endif
++
++ res = PKCS12_parse(p12, buf, &pkey, &cert, NULL);
++ if (res != 1) {
++ PKCS12_free(p12);
++ return -1;
++ }
++
++ ok = TRUE;
++ break;
++ }
++ }
++
++ ERR_clear_error();
++ fprintf(stderr, "\nWrong password for this PKCS12 file. Please try again.\n");
++ }
++ } else {
++ res = PKCS12_parse(p12, passwd, &pkey, &cert, NULL);
++ if (res != 1) {
++ PKCS12_free(p12);
++ return -1;
++ }
++
++ ok = TRUE;
++ }
++
++ } else {
++ fprintf(stderr, "\nUnable to read PKCS12 file.\n");
++ return -1;
++ }
++
++ /* Now we should have an EVP_PKEY (which may or may not need a passphrase),
++ * and a cert. We don't really care about the cert right now. But we
++ * DO need to get the passphrase for the private key. Do this by writing
++ * the key to a BIO, then calling tls_get_passphrase() for that BIO.
++ *
++ * It looks like OpenSSL's pkcs12 command-line tool does not allow
++ * passphrase-protected keys to be written into a PKCS12 structure;
++ * the key is decrypted first (hence, probably, the password protection
++ * for the entire PKCS12 structure). Can the same be assumed to be true
++ * for PKCS12 files created via other applications?
++ *
++ * For now, assume yes, that all PKCS12 files will have private keys which
++ * are not encrypted. If this is found to NOT be the case, then we
++ * will need to write the obtained private key out to a BIO somehow,
++ * then call tls_get_passphrase() on that BIO, rather than on a path.
++ */
++
++ if (cert)
++ X509_free(cert);
++
++ if (pkey)
++ EVP_PKEY_free(pkey);
++
++ if (p12)
++ PKCS12_free(p12);
++
++ if (!ok) {
++#if OPENSSL_VERSION_NUMBER < 0x00908001
++ PEMerr(PEM_F_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
++#else
++ PEMerr(PEM_F_PEM_DEF_CALLBACK, PEM_R_PROBLEMS_GETTING_PASSWORD);
++#endif
++ return -1;
++ }
++
++ ERR_clear_error();
++ return res;
++}
++
++static int tls_get_passphrase(server_rec *s, const char *path,
++ const char *prompt, char *buf, size_t bufsz, int flags) {
++ FILE *keyf = NULL;
++ EVP_PKEY *pkey = NULL;
++ struct tls_pkey_data pdata;
++ register unsigned int attempt;
++
++ if (path) {
++ int fd, res;
++
++ /* Open an fp on the cert file. */
++ PRIVS_ROOT
++ fd = open(path, O_RDONLY);
++ PRIVS_RELINQUISH
++
++ if (fd < 0) {
++ SYSerr(SYS_F_FOPEN, errno);
++ return -1;
++ }
++
++ /* Make sure the fd isn't one of the big three. */
++ res = pr_fs_get_usable_fd(fd);
++ if (res >= 0) {
++ fd = res;
++ }
++
++ keyf = fdopen(fd, "r");
++ if (keyf == NULL) {
++ SYSerr(SYS_F_FOPEN, errno);
++ return -1;
++ }
++ }
++
++ pdata.s = s;
++ pdata.flags = flags;
++ pdata.buf = buf;
++ pdata.buflen = 0;
++ pdata.bufsz = bufsz;
++ pdata.prompt = prompt;
++
++ set_prompt_fds();
++
++ if (flags & TLS_PASSPHRASE_FL_PKCS12_PASSWD) {
++ int res;
++
++ res = tls_get_pkcs12_passwd(s, keyf, prompt, buf, bufsz, flags, &pdata);
++
++ if (keyf)
++ fclose(keyf);
++
++ /* Restore the normal stderr logging. */
++ restore_prompt_fds();
++
++ return res;
++ }
++
++ /* The user gets three tries to enter the correct passphrase. */
++ for (attempt = 0; attempt < 3; attempt++) {
++
++ /* Always handle signals in a loop. */
++ pr_signals_handle();
++
++ pkey = PEM_read_PrivateKey(keyf, NULL, tls_passphrase_cb, &pdata);
++ if (pkey)
++ break;
++
++ if (keyf)
++ fseek(keyf, 0, SEEK_SET);
++
++ ERR_clear_error();
++ fprintf(stderr, "\nWrong passphrase for this key. Please try again.\n");
++ }
++
++ if (keyf)
++ fclose(keyf);
++
++ /* Restore the normal stderr logging. */
++ restore_prompt_fds();
++
++ if (pkey == NULL)
++ return -1;
++
++ EVP_PKEY_free(pkey);
++
++#if OPENSSL_VERSION_NUMBER >= 0x000905000L
++ /* Use the obtained passphrase as additional entropy, ostensibly
++ * unknown to attackers who may be watching the network, for
++ * OpenSSL's PRNG.
++ *
++ * Human language gives about 2-3 bits of entropy per byte (RFC1750).
++ */
++ RAND_add(buf, pdata.buflen, pdata.buflen * 0.25);
++#endif
++
++#ifdef HAVE_MLOCK
++ PRIVS_ROOT
++ if (mlock(buf, bufsz) < 0)
++ pr_log_debug(DEBUG1, MOD_TLS_VERSION
++ ": error locking passphrase into memory: %s", strerror(errno));
++ else
++ pr_log_debug(DEBUG1, MOD_TLS_VERSION ": passphrase locked into memory");
++ PRIVS_RELINQUISH
++#endif
++
++ return 0;
++}
++
++static int tls_handshake_timeout_cb(CALLBACK_FRAME) {
++ tls_handshake_timed_out = TRUE;
++ return 0;
++}
++
++static tls_pkey_t *tls_lookup_pkey(void) {
++ tls_pkey_t *k, *pkey = NULL;
++
++ for (k = tls_pkey_list; k; k = k->next) {
++
++ /* If this pkey matches the current server_rec, mark it and move on. */
++ if (k->server == main_server) {
++
++#ifdef HAVE_MLOCK
++ /* mlock() the passphrase memory areas again; page locks are not
++ * inherited across forks.
++ */
++ PRIVS_ROOT
++ if (k->rsa_pkey) {
++ if (mlock(k->rsa_pkey, k->pkeysz) < 0)
++ tls_log("error locking passphrase into memory: %s", strerror(errno));
++ }
++
++ if (k->dsa_pkey) {
++ if (mlock(k->dsa_pkey, k->pkeysz) < 0)
++ tls_log("error locking passphrase into memory: %s", strerror(errno));
++ }
++
++ if (k->pkcs12_passwd) {
++ if (mlock(k->pkcs12_passwd, k->pkeysz) < 0)
++ tls_log("error locking password into memory: %s", strerror(errno));
++ }
++ PRIVS_RELINQUISH
++#endif /* HAVE_MLOCK */
++
++ pkey = k;
++ continue;
++ }
++
++ /* Otherwise, scrub the passphrase's memory areas. */
++ if (k->rsa_pkey) {
++ pr_memscrub(k->rsa_pkey, k->pkeysz);
++ free(k->rsa_pkey_ptr);
++ k->rsa_pkey = k->rsa_pkey_ptr = NULL;
++ }
++
++ if (k->dsa_pkey) {
++ pr_memscrub(k->dsa_pkey, k->pkeysz);
++ free(k->dsa_pkey_ptr);
++ k->dsa_pkey = k->dsa_pkey_ptr = NULL;
++ }
++
++ if (k->pkcs12_passwd) {
++ pr_memscrub(k->pkcs12_passwd, k->pkeysz);
++ free(k->pkcs12_passwd_ptr);
++ k->pkcs12_passwd = k->pkcs12_passwd_ptr = NULL;
++ }
++ }
++
++ return pkey;
++}
++
++static int tls_pkey_cb(char *buf, int buflen, int rwflag, void *data) {
++ tls_pkey_t *k;
++
++ if (!data)
++ return 0;
++
++ k = (tls_pkey_t *) data;
++
++ if ((k->flags & TLS_PKEY_USE_RSA) && k->rsa_pkey) {
++ strncpy(buf, k->rsa_pkey, buflen);
++ buf[buflen - 1] = '\0';
++ return strlen(buf);
++ }
++
++ if ((k->flags & TLS_PKEY_USE_DSA) && k->dsa_pkey) {
++ strncpy(buf, k->dsa_pkey, buflen);
++ buf[buflen - 1] = '\0';
++ return strlen(buf);
++ }
++
++ return 0;
++}
++
++static void tls_scrub_pkeys(void) {
++ tls_pkey_t *k;
++
++ /* Scrub and free all passphrases in memory. */
++ if (tls_pkey_list) {
++ pr_log_debug(DEBUG5, MOD_TLS_VERSION
++ ": scrubbing %u %s from memory",
++ tls_npkeys, tls_npkeys != 1 ? "passphrases" : "passphrase");
++
++ } else {
++ return;
++ }
++
++ for (k = tls_pkey_list; k; k = k->next) {
++ if (k->rsa_pkey) {
++ pr_memscrub(k->rsa_pkey, k->pkeysz);
++ free(k->rsa_pkey_ptr);
++ k->rsa_pkey = k->rsa_pkey_ptr = NULL;
++ }
++
++ if (k->dsa_pkey) {
++ pr_memscrub(k->dsa_pkey, k->pkeysz);
++ free(k->dsa_pkey_ptr);
++ k->dsa_pkey = k->dsa_pkey_ptr = NULL;
++ }
++
++ if (k->pkcs12_passwd) {
++ pr_memscrub(k->pkcs12_passwd, k->pkeysz);
++ free(k->pkcs12_passwd_ptr);
++ k->pkcs12_passwd = k->pkcs12_passwd_ptr = NULL;
++ }
++ }
++
++ tls_pkey_list = NULL;
++ tls_npkeys = 0;
++}
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++static int tls_renegotiate_timeout_cb(CALLBACK_FRAME) {
++ if ((tls_flags & TLS_SESS_ON_CTRL) &&
++ (tls_flags & TLS_SESS_CTRL_RENEGOTIATING)) {
++
++ if (!SSL_renegotiate_pending(ctrl_ssl)) {
++ tls_log("%s", "control channel TLS session renegotiated");
++ tls_flags &= ~TLS_SESS_CTRL_RENEGOTIATING;
++
++ } else if (tls_renegotiate_required) {
++ tls_log("%s", "requested TLS renegotiation timed out on control channel");
++ tls_log("%s", "shutting down control channel TLS session");
++ tls_end_sess(ctrl_ssl, PR_NETIO_STRM_CTRL, 0);
++ tls_ctrl_rd_nstrm->strm_data = tls_ctrl_wr_nstrm->strm_data =
++ ctrl_ssl = NULL;
++ }
++ }
++
++ if ((tls_flags & TLS_SESS_ON_DATA) &&
++ (tls_flags & TLS_SESS_DATA_RENEGOTIATING)) {
++
++ if (!SSL_renegotiate_pending((SSL *) tls_data_wr_nstrm->strm_data)) {
++ tls_log("%s", "data channel TLS session renegotiated");
++ tls_flags &= ~TLS_SESS_DATA_RENEGOTIATING;
++
++ } else if (tls_renegotiate_required) {
++ tls_log("%s", "requested TLS renegotiation timed out on data channel");
++ tls_log("%s", "shutting down data channel TLS session");
++ tls_end_sess((SSL *) tls_data_wr_nstrm->strm_data, PR_NETIO_STRM_DATA, 0);
++ tls_data_rd_nstrm->strm_data = tls_data_wr_nstrm->strm_data = NULL;
++ }
++ }
++
++ return 0;
++}
++
++static int tls_ctrl_renegotiate_cb(CALLBACK_FRAME) {
++ if (tls_flags & TLS_SESS_ON_CTRL) {
++
++ if (TRUE
++#if OPENSSL_VERSION_NUMBER >= 0x009080cfL
++ /* In OpenSSL-0.9.8l and later, SSL session renegotiations
++ * (both client- and server-initiated) are automatically disabled.
++ * Unless the admin explicitly configured support for
++ * client-initiated renegotations via the AllowClientRenegotiations
++ * TLSOption, we can't request renegotiations ourselves.
++ */
++ && (tls_opts & TLS_OPT_ALLOW_CLIENT_RENEGOTIATIONS)
++#endif
++ ) {
++ tls_flags |= TLS_SESS_CTRL_RENEGOTIATING;
++
++ tls_log("requesting TLS renegotiation on control channel "
++ "(%lu sec renegotiation interval)", p1);
++ SSL_renegotiate(ctrl_ssl);
++ /* SSL_do_handshake(ctrl_ssl); */
++
++ pr_timer_add(tls_renegotiate_timeout, 0, &tls_module,
++ tls_renegotiate_timeout_cb, "SSL/TLS renegotation");
++
++ /* Restart the timer. */
++ return 1;
++ }
++ }
++
++ return 0;
++}
++#endif
++
++static DH *tls_dh_cb(SSL *ssl, int is_export, int keylength) {
++ FILE *fp = NULL;
++
++ if (tls_tmp_dh) {
++ return tls_tmp_dh;
++ }
++
++ if (tls_dhparam_file) {
++ fp = fopen(tls_dhparam_file, "r");
++ if (fp) {
++ tls_tmp_dh = PEM_read_DHparams(fp, NULL, NULL, NULL);
++ fclose(fp);
++
++ if (tls_tmp_dh) {
++ return tls_tmp_dh;
++ }
++
++ } else {
++ pr_log_debug(DEBUG3, MOD_TLS_VERSION
++ ": unable to open TLSDHParamFile '%s': %s", tls_dhparam_file,
++ strerror(errno));
++ }
++ }
++
++ switch (keylength) {
++ case 512:
++ tls_tmp_dh = get_dh512();
++ break;
++
++ case 768:
++ tls_tmp_dh = get_dh768();
++ break;
++
++ case 1024:
++ tls_tmp_dh = get_dh1024();
++ break;
++
++ case 1536:
++ tls_tmp_dh = get_dh1536();
++ break;
++
++ case 2048:
++ tls_tmp_dh = get_dh2048();
++ break;
++
++ default:
++ tls_log("unsupported DH key length %d requested, returning 1024 bits",
++ keylength);
++ tls_tmp_dh = get_dh1024();
++ break;
++ }
++
++ return tls_tmp_dh;
++}
++
++/* Post 0.9.7a, RSA blinding is turned on by default, so there is no need to
++ * do this manually.
++ */
++#if OPENSSL_VERSION_NUMBER < 0x0090702fL
++static void tls_blinding_on(SSL *ssl) {
++ EVP_PKEY *pkey = NULL;
++ RSA *rsa = NULL;
++
++ /* RSA keys are subject to timing attacks. To attempt to make such
++ * attacks harder, use RSA blinding.
++ */
++
++ pkey = SSL_get_privatekey(ssl);
++
++ if (pkey)
++ rsa = EVP_PKEY_get1_RSA(pkey);
++
++ if (rsa) {
++ if (RSA_blinding_on(rsa, NULL) != 1)
++ tls_log("error setting RSA blinding: %s",
++ ERR_error_string(ERR_get_error(), NULL));
++ else
++ tls_log("set RSA blinding on");
++
++ /* Now, "free" the RSA pointer, to properly decrement the reference
++ * counter.
++ */
++ RSA_free(rsa);
++
++ } else {
++
++ /* The administrator may have configured DSA keys rather than RSA keys.
++ * In this case, there is nothing to do.
++ */
++ }
++
++ return;
++}
++#endif
++
++static int tls_init_ctx(void) {
++ config_rec *c;
++ int ssl_opts = SSL_OP_ALL|SSL_OP_NO_SSLv2|SSL_OP_SINGLE_DH_USE;
++
++ if (pr_define_exists("TLS_USE_FIPS") &&
++ ServerType == SERVER_INETD) {
++#ifdef OPENSSL_FIPS
++ if (!FIPS_mode()) {
++ /* Make sure OpenSSL is set to use the default RNG, as per an email
++ * discussion on the OpenSSL developer list:
++ *
++ * "The internal FIPS logic uses the default RNG to see the FIPS RNG
++ * as part of the self test process..."
++ */
++ RAND_set_rand_method(NULL);
++
++ if (!FIPS_mode_set(1)) {
++ const char *errstr;
++
++ errstr = tls_get_errors();
++ tls_log("unable to use FIPS mode: %s", errstr);
++ pr_log_pri(PR_LOG_ERR, MOD_TLS_VERSION
++ ": unable to use FIPS mode: %s", errstr);
++
++ errno = EPERM;
++ return -1;
++
++ } else {
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION ": FIPS mode enabled");
++ }
++
++ } else {
++ pr_log_pri(PR_LOG_DEBUG, MOD_TLS_VERSION ": FIPS mode already enabled");
++ }
++#else
++ pr_log_pri(PR_LOG_WARNING, MOD_TLS_VERSION ": FIPS mode requested, but " OPENSSL_VERSION_TEXT " not built with FIPS support");
++#endif /* OPENSSL_FIPS */
++ }
++
++#ifdef ZLIB
++ {
++ COMP_METHOD *cm = COMP_zlib();
++ if (cm != NULL && cm->type != NID_undef) {
++ SSL_COMP_add_compression_method(0xe0, cm); /* Eric Young's ZLIB ID */
++ }
++ }
++#endif /* ZLIB */
++
++ if (ssl_ctx != NULL) {
++ SSL_CTX_free(ssl_ctx);
++ ssl_ctx = NULL;
++ }
++
++ ssl_ctx = SSL_CTX_new(SSLv23_server_method());
++ if (ssl_ctx == NULL) {
++ tls_log("error: SSL_CTX_new(): %s", tls_get_errors());
++ return -1;
++ }
++
++#if OPENSSL_VERSION_NUMBER > 0x000906000L
++ /* The SSL_MODE_AUTO_RETRY mode was added in 0.9.6. */
++ SSL_CTX_set_mode(ssl_ctx, SSL_MODE_AUTO_RETRY);
++#endif
++
++ /* If using OpenSSL-0.9.7 or greater, prevent session resumptions on
++ * renegotiations (more secure).
++ */
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ ssl_opts |= SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION;
++#endif
++
++ /* Disable SSL tickets, for now. */
++#ifdef SSL_OP_NO_TICKET
++ ssl_opts |= SSL_OP_NO_TICKET;
++#endif
++
++ SSL_CTX_set_options(ssl_ctx, ssl_opts);
++
++ /* Set up session caching. */
++ SSL_CTX_set_session_id_context(ssl_ctx, (unsigned char *) MOD_TLS_VERSION,
++ strlen(MOD_TLS_VERSION));
++
++ c = find_config(main_server->conf, CONF_PARAM, "TLSSessionCache", FALSE);
++ if (c) {
++ long timeout;
++
++ /* Look up and initialize the configured session cache provider. */
++ tls_sess_cache = tls_sess_cache_get_cache(c->argv[0]);
++
++ pr_log_debug(DEBUG8, MOD_TLS_VERSION ": opening '%s' TLSSessionCache",
++ (const char *) c->argv[0]);
++
++ timeout = *((long *) c->argv[2]);
++ if (tls_sess_cache_open(c->argv[1], timeout) == 0) {
++ long cache_mode, cache_flags;
++
++ cache_mode = SSL_SESS_CACHE_SERVER;
++
++ /* We could force OpenSSL to use ONLY the configured external session
++ * caching mechanism by using the SSL_SESS_CACHE_NO_INTERNAL mode flag
++ * (available in OpenSSL 0.9.6h and later).
++ *
++ * However, consider the case where the serialized session data is
++ * too large for the external cache, or the external cache refuses
++ * to add the session for some reason. If OpenSSL is using only our
++ * external cache, that session is lost (which could cause problems
++ * e.g. for later protected data transfers, which require that the
++ * SSL session from the control connection be reused).
++ *
++ * If the external cache can be reasonably sure that session data
++ * can be added, then the NO_INTERNAL flag is a good idea; it keeps
++ * OpenSSL from allocating more memory than necessary. Having both
++ * an internal and an external cache of the same data is a bit
++ * unresourceful. Thus we ask the external cache mechanism what
++ * additional cache mode flags to use.
++ */
++
++ cache_flags = tls_sess_cache_get_cache_mode();
++ cache_mode |= cache_flags;
++
++ SSL_CTX_set_session_cache_mode(ssl_ctx, cache_mode);
++ SSL_CTX_set_timeout(ssl_ctx, timeout);
++
++ SSL_CTX_sess_set_new_cb(ssl_ctx, tls_sess_cache_add_sess_cb);
++ SSL_CTX_sess_set_get_cb(ssl_ctx, tls_sess_cache_get_sess_cb);
++ SSL_CTX_sess_set_remove_cb(ssl_ctx, tls_sess_cache_delete_sess_cb);
++
++ } else {
++ pr_log_debug(DEBUG1, MOD_TLS_VERSION
++ ": error opening '%s' TLSSessionCache: %s", (const char *) c->argv[0],
++ strerror(errno));
++
++ /* Default to using OpenSSL's own internal session caching. */
++ SSL_CTX_set_session_cache_mode(ssl_ctx, SSL_SESS_CACHE_SERVER);
++ }
++
++ } else {
++ /* Default to using OpenSSL's own internal session caching. */
++ SSL_CTX_set_session_cache_mode(ssl_ctx, SSL_SESS_CACHE_SERVER);
++ }
++
++ SSL_CTX_set_tmp_dh_callback(ssl_ctx, tls_dh_cb);
++
++ if (tls_seed_prng() < 0) {
++ tls_log("%s", "unable to properly seed PRNG");
++ }
++
++ return 0;
++}
++
++static int tls_init_server(void) {
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ config_rec *c = NULL;
++#endif
++ char *tls_ca_cert = NULL, *tls_ca_path = NULL;
++
++ if ((tls_protocol & TLS_PROTO_SSL_V3) &&
++ (tls_protocol & TLS_PROTO_TLS_V1)) {
++ /* This is the default, so there is no need to do anything. */
++ pr_log_debug(DEBUG8, MOD_TLS_VERSION ": supporting SSLv3, TLSv1 protocols");
++
++ } else if (tls_protocol & TLS_PROTO_SSL_V3) {
++ SSL_CTX_set_ssl_version(ssl_ctx, SSLv3_server_method());
++ pr_log_debug(DEBUG8, MOD_TLS_VERSION ": supporting SSLv3 protocol only");
++
++ } else if (tls_protocol & TLS_PROTO_TLS_V1) {
++ SSL_CTX_set_ssl_version(ssl_ctx, TLSv1_server_method());
++ pr_log_debug(DEBUG8, MOD_TLS_VERSION ": supporting TLSv1 protocol only");
++ }
++
++ tls_ca_cert = get_param_ptr(main_server->conf, "TLSCACertificateFile", FALSE);
++ tls_ca_path = get_param_ptr(main_server->conf, "TLSCACertificatePath", FALSE);
++
++ if (tls_ca_cert || tls_ca_path) {
++
++ /* Set the locations used for verifying certificates. */
++ PRIVS_ROOT
++ if (SSL_CTX_load_verify_locations(ssl_ctx, tls_ca_cert, tls_ca_path) != 1) {
++ PRIVS_RELINQUISH
++ tls_log("unable to set CA verification using file '%s' or "
++ "directory '%s': %s", tls_ca_cert ? tls_ca_cert : "(none)",
++ tls_ca_path ? tls_ca_path : "(none)",
++ ERR_error_string(ERR_get_error(), NULL));
++ return -1;
++ }
++ PRIVS_RELINQUISH
++
++ } else {
++
++ /* Default to using locations set in the OpenSSL config file.
++ */
++
++ tls_log("%s", "using default OpenSSL verification locations "
++ "(see $SSL_CERT_DIR environment variable)");
++
++ if (SSL_CTX_set_default_verify_paths(ssl_ctx) != 1)
++ tls_log("error setting default verification locations: %s",
++ ERR_error_string(ERR_get_error(), NULL));
++ }
++
++ if (!(tls_opts & TLS_OPT_NO_CERT_REQUEST)) {
++ int verify_mode = SSL_VERIFY_PEER;
++ char *tls_ca_chain = NULL;
++
++ /* If we are verifying client, make sure the client sends a cert;
++ * the protocol allows for the client to disregard a request for
++ * its cert by the server.
++ */
++ if (tls_flags & TLS_SESS_VERIFY_CLIENT)
++ verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
++
++ SSL_CTX_set_verify(ssl_ctx, verify_mode, tls_verify_cb);
++
++ /* Note: we add one to the configured depth purposefully. As noted
++ * in the OpenSSL man pages, the verification process will silently
++ * stop at the configured depth, and the error messages ensuing will
++ * be that of an incomplete certificate chain, rather than the
++ * "chain too long" error that might be expected. To log the "chain
++ * too long" condition, we add one to the configured depth, and catch,
++ * in the verify callback, the exceeding of the actual depth.
++ */
++ SSL_CTX_set_verify_depth(ssl_ctx, tls_verify_depth + 1);
++
++ /* Do not forget to configure the certs that the server will send to
++ * the client when requesting a client cert. Use the configured
++ * TLSCertificateChainFile, if present; otherwise, construct the list
++ * from all the certs in the TLSCACertificatePath.
++ */
++
++ tls_ca_chain = get_param_ptr(main_server->conf, "TLSCertificateChainFile",
++ FALSE);
++ if (tls_ca_chain) {
++ if (SSL_CTX_use_certificate_chain_file(ssl_ctx, tls_ca_chain) != 1) {
++ tls_log("unable to use certificate chain '%s': %s", tls_ca_chain,
++ tls_get_errors());
++ }
++ }
++
++ if (tls_ca_cert) {
++ STACK_OF(X509_NAME) *sk;
++
++ /* Use SSL_load_client_CA_file() to load all of the CA certs (since
++ * there can be more than one) from the TLSCACertificateFile. The
++ * entire list of CAs in that file will be present to the client as
++ * the "acceptable client CA" list, assuming that
++ * "TLSOptions NoCertRequest" is not in use.
++ */
++
++ PRIVS_ROOT
++ sk = SSL_load_client_CA_file(tls_ca_cert);
++ PRIVS_RELINQUISH
++
++ if (sk) {
++ SSL_CTX_set_client_CA_list(ssl_ctx, sk);
++
++ } else {
++ tls_log("unable to read certificates in '%s': %s", tls_ca_cert,
++ tls_get_errors());
++ }
++ }
++
++ if (tls_ca_path) {
++ DIR *cacertdir = NULL;
++
++ PRIVS_ROOT
++ cacertdir = opendir(tls_ca_path);
++ PRIVS_RELINQUISH
++
++ if (cacertdir) {
++ struct dirent *cadent = NULL;
++ pool *tmp_pool = make_sub_pool(permanent_pool);
++
++ while ((cadent = readdir(cacertdir)) != NULL) {
++ FILE *cacertf;
++ char *cacertname;
++
++ pr_signals_handle();
++
++ /* Skip dot directories. */
++ if (is_dotdir(cadent->d_name)) {
++ continue;
++ }
++
++ cacertname = pdircat(tmp_pool, tls_ca_path, cadent->d_name, NULL);
++
++ PRIVS_ROOT
++ cacertf = fopen(cacertname, "r");
++ PRIVS_RELINQUISH
++
++ if (cacertf) {
++ X509 *x509 = PEM_read_X509(cacertf, NULL, NULL, NULL);
++
++ if (x509) {
++ if (SSL_CTX_add_client_CA(ssl_ctx, x509) != 1) {
++ tls_log("error adding '%s' to client CA list: %s", cacertname,
++ tls_get_errors());
++ }
++
++ } else {
++ tls_log("unable to read '%s': %s", cacertname, tls_get_errors());
++ }
++
++ fclose(cacertf);
++
++ } else {
++ tls_log("unable to open '%s': %s", cacertname, strerror(errno));
++ }
++ }
++ destroy_pool(tmp_pool);
++ closedir(cacertdir);
++
++ } else {
++ tls_log("unable to add CAs in '%s': %s", tls_ca_path,
++ strerror(errno));
++ }
++ }
++ }
++
++ /* Assume that, if no separate key files are configured, the keys are
++ * in the same file as the corresponding certificate.
++ */
++ if (!tls_rsa_key_file)
++ tls_rsa_key_file = tls_rsa_cert_file;
++
++ if (!tls_dsa_key_file)
++ tls_dsa_key_file = tls_dsa_cert_file;
++
++ PRIVS_ROOT
++ if (tls_rsa_cert_file) {
++ int res = SSL_CTX_use_certificate_file(ssl_ctx, tls_rsa_cert_file,
++ X509_FILETYPE_PEM);
++
++ if (res <= 0) {
++ PRIVS_RELINQUISH
++
++ tls_log("error loading TLSRSACertificateFile '%s': %s", tls_rsa_cert_file,
++ tls_get_errors());
++ return -1;
++ }
++
++ SSL_CTX_set_tmp_rsa_callback(ssl_ctx, tls_rsa_cb);
++ }
++
++ if (tls_rsa_key_file) {
++ int res;
++
++ if (tls_pkey) {
++ tls_pkey->flags |= TLS_PKEY_USE_RSA;
++ tls_pkey->flags &= ~TLS_PKEY_USE_DSA;
++ }
++
++ res = SSL_CTX_use_PrivateKey_file(ssl_ctx, tls_rsa_key_file,
++ X509_FILETYPE_PEM);
++
++ if (res <= 0) {
++ PRIVS_RELINQUISH
++
++ tls_log("error loading TLSRSACertificateKeyFile '%s': %s",
++ tls_rsa_key_file, tls_get_errors());
++ return -1;
++ }
++ }
++
++ if (tls_dsa_cert_file) {
++ int res = SSL_CTX_use_certificate_file(ssl_ctx, tls_dsa_cert_file,
++ X509_FILETYPE_PEM);
++
++ if (res <= 0) {
++ PRIVS_RELINQUISH
++
++ tls_log("error loading TLSDSACertificateFile '%s' %s", tls_dsa_cert_file,
++ tls_get_errors());
++ return -1;
++ }
++ }
++
++ if (tls_dsa_key_file) {
++ int res;
++
++ if (tls_pkey) {
++ tls_pkey->flags |= TLS_PKEY_USE_DSA;
++ tls_pkey->flags &= ~TLS_PKEY_USE_RSA;
++ }
++
++ res = SSL_CTX_use_PrivateKey_file(ssl_ctx, tls_dsa_key_file,
++ X509_FILETYPE_PEM);
++
++ if (res <= 0) {
++ PRIVS_RELINQUISH
++
++ tls_log("error loading TLSDSACertificateKeyFile '%s': %s",
++ tls_dsa_key_file, tls_get_errors());
++ return -1;
++ }
++ }
++
++ if (tls_pkcs12_file) {
++ int res;
++ FILE *fp;
++ X509 *cert = NULL;
++ EVP_PKEY *pkey = NULL;
++ PKCS12 *p12 = NULL;
++ char *passwd = "";
++
++ if (tls_pkey) {
++ passwd = tls_pkey->pkcs12_passwd;
++ }
++
++ fp = fopen(tls_pkcs12_file, "r");
++ if (fp == NULL) {
++ int xerrno = errno;
++
++ PRIVS_RELINQUISH
++ tls_log("error opening TLSPKCS12File '%s': %s", tls_pkcs12_file,
++ strerror(xerrno));
++ return -1;
++ }
++
++ /* Note that this should NOT fail; we will have already parsed the
++ * PKCS12 file already, in order to get the password and key passphrases.
++ */
++ p12 = d2i_PKCS12_fp(fp, NULL);
++ if (p12 == NULL) {
++ tls_log("error reading TLSPKCS12File '%s': %s", tls_pkcs12_file,
++ tls_get_errors());
++ fclose(fp);
++ return -1;
++ }
++
++ fclose(fp);
++
++ /* XXX Need to add support for any CA certs contained in the PKCS12 file.
++ */
++ if (PKCS12_parse(p12, passwd, &pkey, &cert, NULL) != 1) {
++ tls_log("error parsing info in TLSPKCS12File '%s': %s", tls_pkcs12_file,
++ tls_get_errors());
++ PKCS12_free(p12);
++ return -1;
++ }
++
++ res = SSL_CTX_use_certificate(ssl_ctx, cert);
++ if (res <= 0) {
++ PRIVS_RELINQUISH
++
++ tls_log("error loading certificate from TLSPKCS12File '%s' %s",
++ tls_pkcs12_file, tls_get_errors());
++ PKCS12_free(p12);
++
++ if (cert)
++ X509_free(cert);
++
++ if (pkey)
++ EVP_PKEY_free(pkey);
++
++ return -1;
++ }
++
++ if (pkey &&
++ tls_pkey) {
++ switch (EVP_PKEY_type(pkey->type)) {
++ case EVP_PKEY_RSA:
++ tls_pkey->flags |= TLS_PKEY_USE_RSA;
++ tls_pkey->flags &= ~TLS_PKEY_USE_DSA;
++ break;
++
++ case EVP_PKEY_DSA:
++ tls_pkey->flags |= TLS_PKEY_USE_DSA;
++ tls_pkey->flags &= ~TLS_PKEY_USE_RSA;
++ break;
++ }
++ }
++
++ res = SSL_CTX_use_PrivateKey(ssl_ctx, pkey);
++ if (res <= 0) {
++ PRIVS_RELINQUISH
++
++ tls_log("error loading key from TLSPKCS12File '%s' %s", tls_pkcs12_file,
++ tls_get_errors());
++ PKCS12_free(p12);
++
++ if (cert)
++ X509_free(cert);
++
++ if (pkey)
++ EVP_PKEY_free(pkey);
++
++ return -1;
++ }
++
++ if (cert)
++ X509_free(cert);
++
++ if (pkey)
++ EVP_PKEY_free(pkey);
++
++ if (p12)
++ PKCS12_free(p12);
++ }
++
++ PRIVS_RELINQUISH
++
++ /* Log a warning if the server was badly misconfigured, and has no server
++ * certs at all. The client will probably see this situation as something
++ * like:
++ *
++ * error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure
++ *
++ * And the TLSLog will show the error as:
++ *
++ * error:1408A0C1:SSL routines:SSL3_GET_CLIENT_HELLO:no shared cipher
++ */
++ if (tls_rsa_cert_file == NULL &&
++ tls_dsa_cert_file == NULL &&
++ tls_pkcs12_file == NULL) {
++ tls_log("no TLSRSACertificateFile, TLSDSACertificateFile, or TLSPKCS12File "
++ "configured; unable to handle SSL/TLS connections");
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION
++ ": no TLSRSACertificateFile, TLSDSACertificateFile, or TLSPKCS12File "
++ "configured; unable to handle SSL/TLS connections");
++ }
++
++ /* Set up the CRL. */
++ if (tls_crl_file || tls_crl_path) {
++ tls_crl_store = X509_STORE_new();
++ if (tls_crl_store == NULL) {
++ tls_log("error creating CRL store: %s", tls_get_errors());
++ return -1;
++ }
++
++ if (X509_STORE_load_locations(tls_crl_store, tls_crl_file,
++ tls_crl_path) == 0) {
++
++ if (tls_crl_file && !tls_crl_path) {
++ tls_log("error loading TLSCARevocationFile '%s': %s",
++ tls_crl_file, tls_get_errors());
++
++ } else if (!tls_crl_file && tls_crl_path) {
++ tls_log("error loading TLSCARevocationPath '%s': %s",
++ tls_crl_path, tls_get_errors());
++
++ } else {
++ tls_log("error loading TLSCARevocationFile '%s', "
++ "TLSCARevocationPath '%s': %s", tls_crl_file, tls_crl_path,
++ tls_get_errors());
++ }
++ }
++ }
++
++ SSL_CTX_set_cipher_list(ssl_ctx, tls_cipher_suite);
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ /* Lookup/process any configured TLSRenegotiate parameters. */
++ c = find_config(main_server->conf, CONF_PARAM, "TLSRenegotiate", FALSE);
++ if (c) {
++ if (c->argc == 0) {
++ /* Disable all server-side requested renegotiations; clients can
++ * still request renegotiations.
++ */
++ tls_ctrl_renegotiate_timeout = 0;
++ tls_data_renegotiate_limit = 0;
++ tls_renegotiate_timeout = 0;
++ tls_renegotiate_required = FALSE;
++
++ } else {
++ int ctrl_timeout = *((int *) c->argv[0]);
++ off_t data_limit = *((off_t *) c->argv[1]);
++ int renegotiate_timeout = *((int *) c->argv[2]);
++ unsigned char renegotiate_required = *((unsigned char *) c->argv[3]);
++
++ if (data_limit)
++ tls_data_renegotiate_limit = data_limit;
++
++ if (renegotiate_timeout)
++ tls_renegotiate_timeout = renegotiate_timeout;
++
++ tls_renegotiate_required = renegotiate_required;
++
++ /* Set any control channel renegotiation timers, if need be. */
++ pr_timer_add(ctrl_timeout ? ctrl_timeout : tls_ctrl_renegotiate_timeout,
++ 0, &tls_module, tls_ctrl_renegotiate_cb, "SSL/TLS renegotiation");
++ }
++ }
++
++#endif
++
++ return 0;
++}
++
++static int tls_get_block(conn_t *conn) {
++ int flags;
++
++ flags = fcntl(conn->rfd, F_GETFL);
++ if (flags & O_NONBLOCK) {
++ return FALSE;
++ }
++
++ return TRUE;
++}
++
++static int tls_accept(conn_t *conn, unsigned char on_data) {
++ int blocking, res = 0, xerrno = 0;
++ char *subj = NULL;
++ static unsigned char logged_data = FALSE;
++ SSL *ssl = NULL;
++
++ if (!ssl_ctx) {
++ tls_log("%s", "unable to start session: null SSL_CTX");
++ return -1;
++ }
++
++ ssl = SSL_new(ssl_ctx);
++ if (ssl == NULL) {
++ tls_log("error: unable to start session: %s",
++ ERR_error_string(ERR_get_error(), NULL));
++ return -2;
++ }
++
++ blocking = tls_get_block(conn);
++ if (blocking) {
++ /* Put the connection in non-blocking mode for the duration of the
++ * SSL handshake. This lets us handle EGAIN/retries better (i.e.
++ * without spinning in a tight loop and consuming the CPU).
++ */
++ pr_inet_set_nonblock(conn->pool, conn);
++ }
++
++ /* This works with either rfd or wfd (I hope) */
++ SSL_set_fd(ssl, conn->rfd);
++
++ /* If configured, set a timer for the handshake. */
++ if (tls_handshake_timeout) {
++ tls_handshake_timer_id = pr_timer_add(tls_handshake_timeout, -1,
++ &tls_module, tls_handshake_timeout_cb, "SSL/TLS handshake");
++ }
++
++ retry:
++ pr_signals_handle();
++ res = SSL_accept(ssl);
++ if (res == -1) {
++ xerrno = errno;
++ }
++
++ if (blocking) {
++ /* Return the connection to blocking mode. */
++ pr_inet_set_block(conn->pool, conn);
++ }
++
++ if (res < 1) {
++ const char *msg = "unable to accept TLS connection";
++ int errcode = SSL_get_error(ssl, res);
++
++ pr_signals_handle();
++
++ if (tls_handshake_timed_out) {
++ tls_log("TLS negotiation timed out (%u seconds)", tls_handshake_timeout);
++ tls_end_sess(ssl, on_data ? PR_NETIO_STRM_DATA : PR_NETIO_STRM_CTRL, 0);
++ return -4;
++ }
++
++ switch (errcode) {
++ case SSL_ERROR_WANT_READ:
++ tls_readmore(conn->rfd);
++ goto retry;
++
++ case SSL_ERROR_WANT_WRITE:
++ tls_writemore(conn->rfd);
++ goto retry;
++
++ case SSL_ERROR_ZERO_RETURN:
++ tls_log("%s: TLS connection closed", msg);
++ break;
++
++ case SSL_ERROR_WANT_X509_LOOKUP:
++ tls_log("%s: needs X509 lookup", msg);
++ break;
++
++ case SSL_ERROR_SYSCALL: {
++ /* Check to see if the OpenSSL error queue has info about this. */
++ int xerrcode = ERR_get_error();
++
++ if (xerrcode == 0) {
++ /* The OpenSSL error queue doesn't have any more info, so we'll
++ * examine the SSL_accept() return value itself.
++ */
++
++ if (res == 0) {
++ /* EOF */
++ tls_log("%s: received EOF that violates protocol", msg);
++
++ } else if (res == -1) {
++ /* Check errno */
++ tls_log("%s: system call error: [%d] %s", msg, xerrno,
++ strerror(xerrno));
++ }
++
++ } else {
++ tls_log("%s: system call error: %s", msg, tls_get_errors());
++ }
++
++ break;
++ }
++
++ case SSL_ERROR_SSL:
++ tls_log("%s: protocol error: %s", msg, tls_get_errors());
++ break;
++ }
++
++ tls_end_sess(ssl, on_data ? PR_NETIO_STRM_DATA : PR_NETIO_STRM_CTRL, 0);
++ return -3;
++ }
++
++ /* Disable the handshake timer. */
++ pr_timer_remove(tls_handshake_timer_id, &tls_module);
++
++ /* Stash the SSL object in the pointers of the correct NetIO streams. */
++ if (conn == session.c) {
++ pr_buffer_t *strm_buf;
++
++ ctrl_ssl = ssl;
++ tls_ctrl_rd_nstrm->strm_data = tls_ctrl_wr_nstrm->strm_data = (void *) ssl;
++
++ /* Clear any data from the NetIO stream buffers which may have been read
++ * in before the SSL/TLS handshake occurred (Bug#3624).
++ */
++ strm_buf = tls_ctrl_rd_nstrm->strm_buf;
++ strm_buf->current = NULL;
++ strm_buf->remaining = strm_buf->buflen;
++
++ } else if (conn == session.d) {
++ pr_buffer_t *strm_buf;
++
++ tls_data_rd_nstrm->strm_data = tls_data_wr_nstrm->strm_data = (void *) ssl;
++
++ /* Clear any data from the NetIO stream buffers which may have been read
++ * in before the SSL/TLS handshake occurred (Bug#3624).
++ */
++ strm_buf = tls_data_rd_nstrm->strm_buf;
++ strm_buf->current = NULL;
++ strm_buf->remaining = strm_buf->buflen;
++ }
++
++#if OPENSSL_VERSION_NUMBER == 0x009080cfL
++ /* In OpenSSL-0.9.8l, SSL session renegotiations are automatically
++ * disabled. Thus if the admin explicitly configured support for
++ * client-initiated renegotations via the AllowClientRenegotiations
++ * TLSOption, then we need to do some hackery to enable renegotiations.
++ */
++ if (tls_opts & TLS_OPT_ALLOW_CLIENT_RENEGOTIATIONS) {
++ ssl->s3->flags |= SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION;
++ }
++#endif
++
++ /* TLS handshake on the control channel... */
++ if (!on_data) {
++ tls_log("%s connection accepted, using cipher %s (%d bits)",
++ SSL_get_cipher_version(ssl), SSL_get_cipher_name(ssl),
++ SSL_get_cipher_bits(ssl, NULL));
++
++ subj = tls_get_subj_name();
++ if (subj)
++ tls_log("Client: %s", subj);
++
++ if (!(tls_opts & TLS_OPT_NO_CERT_REQUEST)) {
++
++ /* NOTE: should probably use SSL_get_verify_result() as a last
++ * sanity check.
++ */
++
++ /* Now we can go on with our post-handshake, application level
++ * requirement checks.
++ */
++ if (!tls_check_client_cert(ssl, conn)) {
++ return -1;
++ }
++ }
++
++ /* Setup the TLS environment variables, if requested. */
++ tls_setup_environ(ssl);
++
++ /* TLS handshake on the data channel... */
++ } else {
++
++ /* We won't check for session reuse for data connections when either
++ * a) the NoSessionReuseRequired TLSOption has been configured, or
++ * b) the CCC command has been used (Bug#3465).
++ */
++ if (!(tls_opts & TLS_OPT_NO_SESSION_REUSE_REQUIRED) &&
++ !(tls_flags & TLS_SESS_HAVE_CCC)) {
++ int reused;
++ SSL_SESSION *ctrl_sess;
++
++ /* Ensure that the following conditions are met:
++ *
++ * 1. The client reused an existing SSL session
++ * 2. The reused SSL session matches the SSL session from the control
++ * connection.
++ *
++ * Shutdown the SSL session unless the conditions are met. By
++ * requiring these conditions, we make sure that the client which is
++ * talking to us on the control connection is indeed the same client
++ * that is using this data connection. Without this checks, a
++ * malicious client might be able to hijack/steal the data transfer.
++ */
++
++ reused = SSL_session_reused(ssl);
++ if (reused != 1) {
++ tls_log("client did not reuse SSL session, rejecting data connection "
++ "(see TLSOption NoSessionReuseRequired)");
++ tls_end_sess(ssl, PR_NETIO_STRM_DATA, 0);
++ tls_data_rd_nstrm->strm_data = tls_data_wr_nstrm->strm_data = NULL;
++ return -1;
++
++ } else {
++ tls_log("%s", "client reused SSL session for data connection");
++ }
++
++ ctrl_sess = SSL_get_session(ctrl_ssl);
++ if (ctrl_sess != NULL) {
++ SSL_SESSION *data_sess;
++
++ data_sess = SSL_get_session(ssl);
++ if (data_sess != NULL) {
++#if OPENSSL_VERSION_NUMBER < 0x000907000L
++ if (SSL_SESSION_cmp(ctrl_sess, data_sess) != 0) {
++#else
++ unsigned char *sess_id;
++ unsigned int sess_id_len;
++
++# if OPENSSL_VERSION_NUMBER > 0x000908000L
++ sess_id = (unsigned char *) SSL_SESSION_get_id(data_sess,
++ &sess_id_len);
++# else
++ /* XXX Directly accessing these fields cannot be a Good Thing. */
++ sess_id = data_sess->session_id;
++ sess_id_len = data_sess->session_id_length;
++# endif
++
++ if (!SSL_has_matching_session_id(ctrl_ssl, sess_id, sess_id_len)) {
++#endif
++ tls_log("Client did not reuse SSL session from control channel, "
++ "rejecting data connection (see TLSOption "
++ "NoSessionReuseRequired)");
++ tls_end_sess(ssl, PR_NETIO_STRM_DATA, 0);
++ return -1;
++ }
++
++ } else {
++ /* This should never happen, so log if it does. */
++ tls_log("BUG: SSL_get_session() returned null for data SSL");
++ }
++
++ } else {
++ /* This should never happen, so log if it does. */
++ tls_log("BUG: SSL_get_session() returned null for control SSL");
++ }
++ }
++
++ /* Only be verbose with the first TLS data connection, otherwise there
++ * might be too much noise.
++ */
++ if (!logged_data) {
++ tls_log("%s data connection accepted, using cipher %s (%d bits)",
++ SSL_get_cipher_version(ssl), SSL_get_cipher_name(ssl),
++ SSL_get_cipher_bits(ssl, NULL));
++ logged_data = TRUE;
++ }
++ }
++
++ return 0;
++}
++
++static void tls_cleanup(int flags) {
++
++ tls_sess_cache_close();
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ if (tls_crypto_device) {
++ ENGINE_cleanup();
++ tls_crypto_device = NULL;
++ }
++#endif
++
++ if (tls_crl_store) {
++ X509_STORE_free(tls_crl_store);
++ tls_crl_store = NULL;
++ }
++
++ if (ssl_ctx) {
++ SSL_CTX_free(ssl_ctx);
++ ssl_ctx = NULL;
++ }
++
++ if (tls_tmp_dh) {
++ DH_free(tls_tmp_dh);
++ tls_tmp_dh = NULL;
++ }
++
++ if (tls_tmp_rsa) {
++ RSA_free(tls_tmp_rsa);
++ tls_tmp_rsa = NULL;
++ }
++
++ if (!(flags & TLS_CLEANUP_FL_SESS_INIT)) {
++ ERR_free_strings();
++ ERR_remove_state(0);
++ EVP_cleanup();
++
++ } else {
++ /* Only call EVP_cleanup() et al if other OpenSSL-using modules are not
++ * present. If we called EVP_cleanup() here during session
++ * initialization, and other modules want to use OpenSSL, we may
++ * be depriving those modules of OpenSSL functionality.
++ *
++ * At the moment, the modules known to use OpenSSL are mod_ldap,
++ * mod_sftp, mod_sql, and mod_sql_passwd.
++ */
++ if (pr_module_get("mod_ldap.c") == NULL &&
++ pr_module_get("mod_sftp.c") == NULL &&
++ pr_module_get("mod_sql.c") == NULL &&
++ pr_module_get("mod_sql_passwd.c") == NULL) {
++ ERR_free_strings();
++ ERR_remove_state(0);
++ EVP_cleanup();
++ }
++ }
++}
++
++static void tls_end_sess(SSL *ssl, int strms, int flags) {
++ int res = 0;
++ int shutdown_state;
++
++ if (!ssl)
++ return;
++
++ /* A 'close_notify' alert (SSL shutdown message) may have been previously
++ * sent to the client via tls_netio_shutdown_cb().
++ */
++
++ shutdown_state = SSL_get_shutdown(ssl);
++ if (!(shutdown_state & SSL_SENT_SHUTDOWN)) {
++ errno = 0;
++
++ /* 'close_notify' not already sent; send it now. */
++ res = SSL_shutdown(ssl);
++ }
++
++ if (res == 0) {
++ /* Now call SSL_shutdown() again, but only if necessary. */
++ if (flags & TLS_SHUTDOWN_BIDIRECTIONAL) {
++ shutdown_state = SSL_get_shutdown(ssl);
++
++ res = 1;
++ if (!(shutdown_state & SSL_RECEIVED_SHUTDOWN)) {
++ errno = 0;
++ res = SSL_shutdown(ssl);
++ }
++ }
++
++ if (res == 0) {
++ long err_code;
++
++ err_code = SSL_get_error(ssl, res);
++ switch (err_code) {
++ case SSL_ERROR_WANT_READ:
++ tls_log("SSL_shutdown error: WANT_READ");
++ pr_log_debug(DEBUG0, MOD_TLS_VERSION
++ ": SSL_shutdown error: WANT_READ");
++ break;
++
++ case SSL_ERROR_WANT_WRITE:
++ tls_log("SSL_shutdown error: WANT_WRITE");
++ pr_log_debug(DEBUG0, MOD_TLS_VERSION
++ ": SSL_shutdown error: WANT_WRITE");
++ break;
++
++ case SSL_ERROR_ZERO_RETURN:
++ /* Clean shutdown, nothing we need to do. */
++ break;
++
++ case SSL_ERROR_SYSCALL:
++ if (errno != 0 &&
++ errno != EOF &&
++ errno != EBADF &&
++ errno != EPIPE &&
++ errno != EPERM &&
++ errno != ENOSYS) {
++ tls_log("SSL_shutdown syscall error: %s", strerror(errno));
++ }
++ break;
++
++ default:
++ tls_log("SSL_shutdown error [%ld]: %s", err_code, tls_get_errors());
++ pr_log_debug(DEBUG0, MOD_TLS_VERSION
++ ": SSL_shutdown error [%ld]: %s", err_code, tls_get_errors());
++ break;
++ }
++ }
++
++ } else if (res < 0) {
++ long err_code;
++
++ err_code = SSL_get_error(ssl, res);
++ switch (err_code) {
++ case SSL_ERROR_WANT_READ:
++ case SSL_ERROR_WANT_WRITE:
++ case SSL_ERROR_ZERO_RETURN:
++ /* Clean shutdown, nothing we need to do. The WANT_READ/WANT_WRITE
++ * error codes crept into OpenSSL 0.9.8m, with changes to make
++ * SSL_shutdown() work properly for non-blocking sockets. And
++ * handling these error codes for older OpenSSL versions won't break
++ * things.
++ */
++ break;
++
++ case SSL_ERROR_SYSCALL:
++ if (errno != 0 &&
++ errno != EOF &&
++ errno != EBADF &&
++ errno != EPIPE &&
++ errno != EPERM &&
++ errno != ENOSYS) {
++ tls_log("SSL_shutdown syscall error: %s", strerror(errno));
++ }
++ break;
++
++ default:
++ tls_fatal_error(err_code, __LINE__);
++ break;
++ }
++ }
++
++ SSL_free(ssl);
++}
++
++static const char *tls_get_errors(void) {
++ unsigned int count = 0;
++ unsigned long e = ERR_get_error();
++ BIO *bio = NULL;
++ char *data = NULL;
++ long datalen;
++ const char *str = "(unknown)";
++
++ /* Use ERR_print_errors() and a memory BIO to build up a string with
++ * all of the error messages from the error queue.
++ */
++
++ if (e)
++ bio = BIO_new(BIO_s_mem());
++
++ while (e) {
++ pr_signals_handle();
++ BIO_printf(bio, "\n (%u) %s", ++count, ERR_error_string(e, NULL));
++ e = ERR_get_error();
++ }
++
++ datalen = BIO_get_mem_data(bio, &data);
++ if (data) {
++ data[datalen] = '\0';
++ str = pstrdup(main_server->pool, data);
++ }
++
++ if (bio)
++ BIO_free(bio);
++
++ return str;
++}
++
++/* Return a page-aligned pointer to memory of at least the given size.
++ */
++static char *tls_get_page(size_t sz, void **ptr) {
++ void *d;
++ long pagesz = tls_get_pagesz(), p;
++
++ d = calloc(1, sz + (pagesz-1));
++ if (d == NULL) {
++ pr_log_pri(PR_LOG_ERR, "out of memory!");
++ exit(1);
++ }
++
++ *ptr = d;
++
++ p = ((long) d + (pagesz-1)) &~ (pagesz-1);
++
++ return ((char *) p);
++}
++
++/* Return the size of a page on this architecture.
++ */
++static size_t tls_get_pagesz(void) {
++ long pagesz;
++
++#if defined(_SC_PAGESIZE)
++ pagesz = sysconf(_SC_PAGESIZE);
++#elif defined(_SC_PAGE_SIZE)
++ pagesz = sysconf(_SC_PAGE_SIZE);
++#else
++ /* Default to using OpenSSL's defined buffer size for PEM files. */
++ pagesz = PEM_BUFSIZE;
++#endif /* !_SC_PAGESIZE and !_SC_PAGE_SIZE */
++
++ return pagesz;
++}
++
++static char *tls_get_subj_name(void) {
++ X509 *cert = SSL_get_peer_certificate(ctrl_ssl);
++
++ if (cert) {
++ char *name = tls_x509_name_oneline(X509_get_subject_name(cert));
++ X509_free(cert);
++ return name;
++ }
++
++ return NULL;
++}
++
++static void tls_fatal_error(long error, int lineno) {
++
++ switch (error) {
++ case SSL_ERROR_NONE:
++ return;
++
++ case SSL_ERROR_SSL:
++ tls_log("panic: SSL_ERROR_SSL, line %d: %s", lineno, tls_get_errors());
++ break;
++
++ case SSL_ERROR_WANT_READ:
++ tls_log("panic: SSL_ERROR_WANT_READ, line %d", lineno);
++ break;
++
++ case SSL_ERROR_WANT_WRITE:
++ tls_log("panic: SSL_ERROR_WANT_WRITE, line %d", lineno);
++ break;
++
++ case SSL_ERROR_WANT_X509_LOOKUP:
++ tls_log("panic: SSL_ERROR_WANT_X509_LOOKUP, line %d", lineno);
++ break;
++
++ case SSL_ERROR_SYSCALL: {
++ long xerrcode = ERR_get_error();
++
++ if (errno == ECONNRESET)
++ return;
++
++ /* Check to see if the OpenSSL error queue has info about this. */
++ if (xerrcode == 0) {
++ /* The OpenSSL error queue doesn't have any more info, so we'll
++ * examine the error value itself.
++ */
++
++ if (errno == EOF)
++ tls_log("panic: SSL_ERROR_SYSCALL, line %d: "
++ "EOF that violates protocol", lineno);
++
++ else
++ /* Check errno */
++ tls_log("panic: SSL_ERROR_SYSCALL, line %d: %s", lineno,
++ strerror(errno));
++
++ } else
++ tls_log("panic: SSL_ERROR_SYSCALL, line %d: %s", lineno,
++ tls_get_errors());
++
++ break;
++ }
++
++ case SSL_ERROR_ZERO_RETURN:
++ tls_log("panic: SSL_ERROR_ZERO_RETURN, line %d", lineno);
++ break;
++
++ case SSL_ERROR_WANT_CONNECT:
++ tls_log("panic: SSL_ERROR_WANT_CONNECT, line %d", lineno);
++ break;
++
++ default:
++ tls_log("panic: SSL_ERROR %ld, line %d", error, lineno);
++ break;
++ }
++
++ tls_log("%s", "unexpected OpenSSL error, disconnecting");
++ pr_log_pri(PR_LOG_ERR, "%s", MOD_TLS_VERSION
++ ": unexpected OpenSSL error, disconnecting");
++
++ end_login(1);
++}
++
++/* This function checks if the client's cert is in the ~/.tlslogin file
++ * of the "user".
++ */
++static unsigned char tls_dotlogin_allow(const char *user) {
++ char buf[512] = {'\0'}, *home = NULL;
++ FILE *fp = NULL;
++ X509 *client_cert = NULL, *file_cert = NULL;
++ struct passwd *pwd = NULL;
++ pool *tmp_pool = NULL;
++ unsigned char allow_user = FALSE;
++
++ if (!(tls_flags & TLS_SESS_ON_CTRL) ||
++ !ctrl_ssl ||
++ !user)
++ return FALSE;
++
++ tmp_pool = make_sub_pool(permanent_pool);
++
++ PRIVS_ROOT
++ pwd = pr_auth_getpwnam(tmp_pool, user);
++ PRIVS_RELINQUISH
++
++ if (!pwd) {
++ destroy_pool(tmp_pool);
++ return FALSE;
++ }
++
++ /* Handle the case where the user's home directory is a symlink. */
++ PRIVS_USER
++ home = dir_realpath(tmp_pool, pwd->pw_dir);
++ PRIVS_RELINQUISH
++
++ snprintf(buf, sizeof(buf), "%s/.tlslogin", home ? home : pwd->pw_dir);
++ buf[sizeof(buf)-1] = '\0';
++
++ /* No need for the temporary pool any more. */
++ destroy_pool(tmp_pool);
++ tmp_pool = NULL;
++
++ PRIVS_ROOT
++ fp = fopen(buf, "r");
++ PRIVS_RELINQUISH
++
++ if (!fp) {
++ tls_log(".tlslogin check: unable to open '%s': %s", buf, strerror(errno));
++ return FALSE;
++ }
++
++ client_cert = SSL_get_peer_certificate(ctrl_ssl);
++ if (!client_cert) {
++ fclose(fp);
++ return FALSE;
++ }
++
++ while ((file_cert = PEM_read_X509(fp, NULL, NULL, NULL))) {
++ if (!M_ASN1_BIT_STRING_cmp(client_cert->signature, file_cert->signature))
++ allow_user = TRUE;
++
++ X509_free(file_cert);
++ if (allow_user)
++ break;
++ }
++
++ X509_free(client_cert);
++ fclose(fp);
++
++ return allow_user;
++}
++
++/* This is unused...for now. */
++#if 0
++static char *tls_cert_to_user(pool *cert_pool, X509 *cert) {
++ if (!cert_pool || !cert)
++ return FALSE;
++
++ /* NOTE: insert cert->user translation code here. Possibly add
++ * TLSOptions that affect this mapping process.
++ */
++
++ return NULL;
++}
++#endif
++
++static int tls_readmore(int rfd) {
++ fd_set rfds;
++ struct timeval tv;
++
++ FD_ZERO(&rfds);
++ FD_SET(rfd, &rfds);
++
++ /* Use a timeout of 15 seconds */
++ tv.tv_sec = 15;
++ tv.tv_usec = 0;
++
++ return select(rfd + 1, &rfds, NULL, NULL, &tv);
++}
++
++static int tls_writemore(int wfd) {
++ fd_set wfds;
++ struct timeval tv;
++
++ FD_ZERO(&wfds);
++ FD_SET(wfd, &wfds);
++
++ /* Use a timeout of 15 seconds */
++ tv.tv_sec = 15;
++ tv.tv_usec = 0;
++
++ return select(wfd + 1, NULL, &wfds, NULL, &tv);
++}
++
++static ssize_t tls_read(SSL *ssl, void *buf, size_t len) {
++ ssize_t count;
++
++ retry:
++ pr_signals_handle();
++ count = SSL_read(ssl, buf, len);
++ if (count < 0) {
++ long err = SSL_get_error(ssl, count);
++
++ /* read(2) returns only the generic error number -1 */
++ count = -1;
++
++ switch (err) {
++ case SSL_ERROR_WANT_READ:
++ /* OpenSSL needs more data from the wire to finish the current block,
++ * so we wait a little while for it.
++ */
++ err = tls_readmore(SSL_get_fd(ssl));
++ if (err > 0) {
++ goto retry;
++
++ } else if (err == 0) {
++ /* Still missing data after timeout. Simulate an EINTR and return.
++ */
++ errno = EINTR;
++
++ /* If err < 0, i.e. some error from the select(), everything is
++ * already in place; errno is properly set and this function
++ * returns -1.
++ */
++ break;
++ }
++
++ case SSL_ERROR_WANT_WRITE:
++ /* OpenSSL needs to write more data to the wire to finish the current
++ * block, so we wait a little while for it.
++ */
++ err = tls_writemore(SSL_get_fd(ssl));
++ if (err > 0) {
++ goto retry;
++
++ } else if (err == 0) {
++ /* Still missing data after timeout. Simulate an EINTR and return.
++ */
++ errno = EINTR;
++
++ /* If err < 0, i.e. some error from the select(), everything is
++ * already in place; errno is properly set and this function
++ * returns -1.
++ */
++ break;
++ }
++
++ case SSL_ERROR_ZERO_RETURN:
++ tls_log("read EOF from client");
++ break;
++
++ default:
++ tls_fatal_error(err, __LINE__);
++ break;
++ }
++ }
++
++ return count;
++}
++
++static RSA *tls_rsa_cb(SSL *ssl, int is_export, int keylength) {
++ if (tls_tmp_rsa)
++ return tls_tmp_rsa;
++
++ tls_tmp_rsa = RSA_generate_key(keylength, RSA_F4, NULL, NULL);
++ return tls_tmp_rsa;
++}
++
++static int tls_seed_prng(void) {
++ char *heapdata, stackdata[1024];
++ static char rand_file[300];
++ FILE *fp = NULL;
++
++#if OPENSSL_VERSION_NUMBER >= 0x00905100L
++ if (RAND_status() == 1)
++
++ /* PRNG already well-seeded. */
++ return 0;
++#endif
++
++ tls_log("PRNG not seeded with enough data, looking for entropy sources");
++
++ /* If the device '/dev/urandom' is present, OpenSSL uses it by default.
++ * Check if it's present, else we have to make random data ourselves.
++ */
++ fp = fopen("/dev/urandom", "r");
++ if (fp) {
++ fclose(fp);
++
++ tls_log("device /dev/urandom is present, assuming OpenSSL will use that "
++ "for PRNG data");
++ return 0;
++ }
++
++ /* Lookup any configured TLSRandomSeed. */
++ tls_rand_file = get_param_ptr(main_server->conf, "TLSRandomSeed", FALSE);
++
++ if (!tls_rand_file) {
++ /* The ftpd's random file is (openssl-dir)/.rnd */
++ memset(rand_file, '\0', sizeof(rand_file));
++ snprintf(rand_file, sizeof(rand_file)-1, "%s/.rnd",
++ X509_get_default_cert_area());
++ tls_rand_file = rand_file;
++ }
++
++#if OPENSSL_VERSION_NUMBER >= 0x00905100L
++ /* In OpenSSL 0.9.5 and later, specifying -1 here means "read the entire
++ * file", which is exactly what we want.
++ */
++ if (RAND_load_file(tls_rand_file, -1) == 0) {
++#else
++
++ /* In versions of OpenSSL prior to 0.9.5, we have to specify the amount of
++ * bytes to read in. Since RAND_write_file(3) typically writes 1K of data
++ * out, we will read 1K bytes in.
++ */
++ if (RAND_load_file(tls_rand_file, 1024) != 1024) {
++#endif
++
++ time_t now;
++ pid_t pid;
++
++#if OPENSSL_VERSION_NUMBER >= 0x00905100L
++ tls_log("unable to load PRNG seed data from '%s': %s", tls_rand_file,
++ tls_get_errors());
++#else
++ tls_log("unable to load 1024 bytes of PRNG seed data from '%s': %s",
++ tls_rand_file, tls_get_errors());
++#endif
++
++ /* No random file found, create new seed. */
++ now = time(NULL);
++ RAND_seed(&now, sizeof(time_t));
++
++ pid = getpid();
++ RAND_seed(&pid, sizeof(pid_t));
++ RAND_seed(stackdata, sizeof(stackdata));
++
++ heapdata = malloc(sizeof(stackdata));
++ if (heapdata != NULL) {
++ RAND_seed(heapdata, sizeof(stackdata));
++ free(heapdata);
++ }
++
++ } else {
++ tls_log("loaded PRNG seed data from '%s'", tls_rand_file);
++ }
++
++#if OPENSSL_VERSION_NUMBER >= 0x00905100L
++ if (RAND_status() == 0) {
++ /* PRNG still badly seeded. */
++ return -1;
++ }
++#endif
++
++ return 0;
++}
++
++/* Note: these mappings should probably be added to the mod_tls docs.
++ */
++
++static void tls_setup_cert_ext_environ(const char *env_prefix, X509 *cert) {
++
++ /* NOTE: in the future, add ways of adding subjectAltName (and other
++ * extensions?) to the environment.
++ */
++
++#if 0
++ int nexts = 0;
++
++ nexts = X509_get_ext_count(cert);
++ if (nexts > 0) {
++ register unsigned int i = 0;
++
++ for (i = 0; i < nexts; i++) {
++ X509_EXTENSION *ext = X509_get_ext(cert, i);
++ const char *extstr = OBJ_nid2sn(OBJ_obj2nid(
++ X509_EXTENSION_get_object(ext)));
++ }
++ }
++#endif
++
++ return;
++}
++
++/* Note: these mappings should probably be added to the mod_tls docs.
++ *
++ * Name Short Name NID
++ * ---- ---------- ---
++ * countryName C NID_countryName
++ * commonName CN NID_commonName
++ * description D NID_description
++ * givenName G NID_givenName
++ * initials I NID_initials
++ * localityName L NID_localityName
++ * organizationName O NID_organizationName
++ * organizationalUnitName OU NID_organizationalUnitName
++ * stateOrProvinceName ST NID_stateOrProvinceName
++ * surname S NID_surname
++ * title T NID_title
++ * uniqueIdentifer UID NID_x500UniqueIdentifier
++ * (or NID_uniqueIdentifier, depending
++ * on OpenSSL version)
++ * email Email NID_pkcs9_emailAddress
++ */
++
++static void tls_setup_cert_dn_environ(const char *env_prefix, X509_NAME *name) {
++ register unsigned int i = 0;
++ char *k, *v;
++
++ for (i = 0; i < sk_X509_NAME_ENTRY_num(name->entries); i++) {
++ X509_NAME_ENTRY *entry = sk_X509_NAME_ENTRY_value(name->entries, i);
++ int nid = OBJ_obj2nid(entry->object);
++
++ switch (nid) {
++ case NID_countryName:
++ k = pstrcat(main_server->pool, env_prefix, "C", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_commonName:
++ k = pstrcat(main_server->pool, env_prefix, "CN", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_description:
++ k = pstrcat(main_server->pool, env_prefix, "D", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_givenName:
++ k = pstrcat(main_server->pool, env_prefix, "G", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_initials:
++ k = pstrcat(main_server->pool, env_prefix, "I", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_localityName:
++ k = pstrcat(main_server->pool, env_prefix, "L", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_organizationName:
++ k = pstrcat(main_server->pool, env_prefix, "O", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_organizationalUnitName:
++ k = pstrcat(main_server->pool, env_prefix, "OU", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_stateOrProvinceName:
++ k = pstrcat(main_server->pool, env_prefix, "ST", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_surname:
++ k = pstrcat(main_server->pool, env_prefix, "S", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_title:
++ k = pstrcat(main_server->pool, env_prefix, "T", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++#if OPENSSL_VERSION_NUMBER >= 0x00907000L
++ case NID_x500UniqueIdentifier:
++#else
++ case NID_uniqueIdentifier:
++#endif
++ k = pstrcat(main_server->pool, env_prefix, "UID", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ case NID_pkcs9_emailAddress:
++ k = pstrcat(main_server->pool, env_prefix, "Email", NULL);
++ v = pstrndup(main_server->pool, (const char *) entry->value->data,
++ entry->value->length);
++ pr_env_set(main_server->pool, k, v);
++ break;
++
++ default:
++ break;
++ }
++ }
++}
++
++static void tls_setup_cert_environ(const char *env_prefix, X509 *cert) {
++ char *data = NULL, *k, *v;
++ long datalen = 0;
++ BIO *bio = NULL;
++
++ if (tls_opts & TLS_OPT_STD_ENV_VARS) {
++ char buf[80] = {'\0'};
++ ASN1_INTEGER *serial = X509_get_serialNumber(cert);
++
++ memset(buf, '\0', sizeof(buf));
++ snprintf(buf, sizeof(buf) - 1, "%lu", X509_get_version(cert) + 1);
++ buf[sizeof(buf)-1] = '\0';
++
++ k = pstrcat(main_server->pool, env_prefix, "M_VERSION", NULL);
++ v = pstrdup(main_server->pool, buf);
++ pr_env_set(main_server->pool, k, v);
++
++ if (serial->length < 4) {
++ memset(buf, '\0', sizeof(buf));
++ snprintf(buf, sizeof(buf) - 1, "%lu", ASN1_INTEGER_get(serial));
++ buf[sizeof(buf)-1] = '\0';
++
++ k = pstrcat(main_server->pool, env_prefix, "M_SERIAL", NULL);
++ v = pstrdup(main_server->pool, buf);
++ pr_env_set(main_server->pool, k, v);
++
++ } else {
++
++ /* NOTE: actually, the number is printable, I'm just being lazy. This
++ * case is much harder to deal with, and not really worth the effort.
++ */
++ tls_log("%s", "certificate serial number not printable");
++ }
++
++ k = pstrcat(main_server->pool, env_prefix, "S_DN", NULL);
++ v = pstrdup(main_server->pool,
++ tls_x509_name_oneline(X509_get_subject_name(cert)));
++ pr_env_set(main_server->pool, k, v);
++
++ tls_setup_cert_dn_environ(pstrcat(main_server->pool, env_prefix, "S_DN_",
++ NULL), X509_get_subject_name(cert));
++
++ k = pstrcat(main_server->pool, env_prefix, "I_DN", NULL);
++ v = pstrdup(main_server->pool,
++ tls_x509_name_oneline(X509_get_issuer_name(cert)));
++ pr_env_set(main_server->pool, k, v);
++
++ tls_setup_cert_dn_environ(pstrcat(main_server->pool, env_prefix, "I_DN_",
++ NULL), X509_get_issuer_name(cert));
++
++ tls_setup_cert_ext_environ(pstrcat(main_server->pool, env_prefix, "EXT_",
++ NULL), cert);
++
++ bio = BIO_new(BIO_s_mem());
++ ASN1_TIME_print(bio, X509_get_notBefore(cert));
++ datalen = BIO_get_mem_data(bio, &data);
++ data[datalen] = '\0';
++
++ k = pstrcat(main_server->pool, env_prefix, "V_START", NULL);
++ v = pstrdup(main_server->pool, data);
++ pr_env_set(main_server->pool, k, v);
++
++ BIO_free(bio);
++
++ bio = BIO_new(BIO_s_mem());
++ ASN1_TIME_print(bio, X509_get_notAfter(cert));
++ datalen = BIO_get_mem_data(bio, &data);
++ data[datalen] = '\0';
++
++ k = pstrcat(main_server->pool, env_prefix, "V_END", NULL);
++ v = pstrdup(main_server->pool, data);
++ pr_env_set(main_server->pool, k, v);
++
++ BIO_free(bio);
++
++ bio = BIO_new(BIO_s_mem());
++ i2a_ASN1_OBJECT(bio, cert->cert_info->signature->algorithm);
++ datalen = BIO_get_mem_data(bio, &data);
++ data[datalen] = '\0';
++
++ k = pstrcat(main_server->pool, env_prefix, "A_SIG", NULL);
++ v = pstrdup(main_server->pool, data);
++ pr_env_set(main_server->pool, k, v);
++
++ BIO_free(bio);
++
++ bio = BIO_new(BIO_s_mem());
++ i2a_ASN1_OBJECT(bio, cert->cert_info->key->algor->algorithm);
++ datalen = BIO_get_mem_data(bio, &data);
++ data[datalen] = '\0';
++
++ k = pstrcat(main_server->pool, env_prefix, "A_KEY", NULL);
++ v = pstrdup(main_server->pool, data);
++ pr_env_set(main_server->pool, k, v);
++
++ BIO_free(bio);
++ }
++
++ bio = BIO_new(BIO_s_mem());
++ PEM_write_bio_X509(bio, cert);
++ datalen = BIO_get_mem_data(bio, &data);
++ data[datalen] = '\0';
++
++ k = pstrcat(main_server->pool, env_prefix, "CERT", NULL);
++ v = pstrdup(main_server->pool, data);
++ pr_env_set(main_server->pool, k, v);
++
++ BIO_free(bio);
++}
++
++static void tls_setup_environ(SSL *ssl) {
++ X509 *cert = NULL;
++ STACK_OF(X509) *sk_cert_chain = NULL;
++ char *k, *v;
++
++ if (!(tls_opts & TLS_OPT_EXPORT_CERT_DATA) &&
++ !(tls_opts & TLS_OPT_STD_ENV_VARS))
++ return;
++
++ if (tls_opts & TLS_OPT_STD_ENV_VARS) {
++ SSL_CIPHER *cipher = NULL;
++ SSL_SESSION *ssl_session = NULL;
++
++ k = pstrdup(main_server->pool, "FTPS");
++ v = pstrdup(main_server->pool, "1");
++ pr_env_set(main_server->pool, k, v);
++
++ k = pstrdup(main_server->pool, "TLS_PROTOCOL");
++ v = pstrdup(main_server->pool, SSL_get_cipher_version(ssl));
++ pr_env_set(main_server->pool, k, v);
++
++ /* Process the SSL session-related environ variable. */
++ ssl_session = SSL_get_session(ssl);
++ if (ssl_session) {
++ char buf[SSL_MAX_SSL_SESSION_ID_LENGTH*2+1];
++ register unsigned int i = 0;
++
++ /* Have to obtain a stringified session ID the hard way. */
++ memset(buf, '\0', sizeof(buf));
++ for (i = 0; i < ssl_session->session_id_length; i++) {
++ snprintf(&(buf[i*2]), sizeof(buf) - (i*2) - 1, "%02X",
++ ssl_session->session_id[i]);
++ }
++ buf[sizeof(buf)-1] = '\0';
++
++ k = pstrdup(main_server->pool, "TLS_SESSION_ID");
++ v = pstrdup(main_server->pool, buf);
++ pr_env_set(main_server->pool, k, v);
++ }
++
++ /* Process the SSL cipher-related environ variables. */
++ cipher = (SSL_CIPHER *) SSL_get_current_cipher(ssl);
++ if (cipher) {
++ char buf[10] = {'\0'};
++ int cipher_bits_used = 0, cipher_bits_possible = 0;
++
++ k = pstrdup(main_server->pool, "TLS_CIPHER");
++ v = pstrdup(main_server->pool, SSL_CIPHER_get_name(cipher));
++ pr_env_set(main_server->pool, k, v);
++
++ cipher_bits_used = SSL_CIPHER_get_bits(cipher, &cipher_bits_possible);
++
++ if (cipher_bits_used < 56) {
++ k = pstrdup(main_server->pool, "TLS_CIPHER_EXPORT");
++ v = pstrdup(main_server->pool, "1");
++ pr_env_set(main_server->pool, k, v);
++ }
++
++ memset(buf, '\0', sizeof(buf));
++ snprintf(buf, sizeof(buf), "%d", cipher_bits_possible);
++ buf[sizeof(buf)-1] = '\0';
++
++ k = pstrdup(main_server->pool, "TLS_CIPHER_KEYSIZE_POSSIBLE");
++ v = pstrdup(main_server->pool, buf);
++ pr_env_set(main_server->pool, k, v);
++
++ memset(buf, '\0', sizeof(buf));
++ snprintf(buf, sizeof(buf), "%d", cipher_bits_used);
++ buf[sizeof(buf)-1] = '\0';
++
++ k = pstrdup(main_server->pool, "TLS_CIPHER_KEYSIZE_USED");
++ v = pstrdup(main_server->pool, buf);
++ pr_env_set(main_server->pool, k, v);
++ }
++
++ k = pstrdup(main_server->pool, "TLS_LIBRARY_VERSION");
++ v = pstrdup(main_server->pool, OPENSSL_VERSION_TEXT);
++ pr_env_set(main_server->pool, k, v);
++ }
++
++ sk_cert_chain = SSL_get_peer_cert_chain(ssl);
++ if (sk_cert_chain) {
++ char *data = NULL;
++ long datalen = 0;
++ register unsigned int i = 0;
++ BIO *bio = NULL;
++
++ /* Adding TLS_CLIENT_CERT_CHAIN environ variables. */
++ for (i = 0; i < sk_X509_num(sk_cert_chain); i++) {
++ size_t klen = 256;
++ k = pcalloc(main_server->pool, klen);
++ snprintf(k, klen - 1, "%s%u", "TLS_CLIENT_CERT_CHAIN", i + 1);
++
++ bio = BIO_new(BIO_s_mem());
++ PEM_write_bio_X509(bio, sk_X509_value(sk_cert_chain, i));
++ datalen = BIO_get_mem_data(bio, &data);
++ data[datalen] = '\0';
++
++ v = pstrdup(main_server->pool, data);
++
++ pr_env_set(main_server->pool, k, v);
++
++ BIO_free(bio);
++ }
++ }
++
++ /* Note: SSL_get_certificate() does NOT increment a reference counter,
++ * so we do not call X509_free() on it.
++ */
++ cert = SSL_get_certificate(ssl);
++ if (cert) {
++ tls_setup_cert_environ("TLS_SERVER_", cert);
++
++ } else {
++ tls_log("unable to set server certificate environ variables: "
++ "Server certificate unavailable");
++ }
++
++ cert = SSL_get_peer_certificate(ssl);
++ if (cert) {
++ tls_setup_cert_environ("TLS_CLIENT_", cert);
++ X509_free(cert);
++
++ } else {
++ tls_log("unable to set client certificate environ variables: "
++ "Client certificate unavailable");
++ }
++
++ return;
++}
++
++static int tls_verify_cb(int ok, X509_STORE_CTX *ctx) {
++ config_rec *c;
++
++ /* We can configure the server to skip the peer's cert verification */
++ if (!(tls_flags & TLS_SESS_VERIFY_CLIENT))
++ return 1;
++
++ c = find_config(main_server->conf, CONF_PARAM, "TLSVerifyOrder", FALSE);
++ if (c) {
++ register unsigned int i;
++
++ for (i = 0; i < c->argc; i++) {
++ char *mech = c->argv[i];
++
++ if (strcasecmp(mech, "crl") == 0) {
++ if (!ok) {
++ ok = tls_verify_crl(ok, ctx);
++
++ } else {
++ break;
++ }
++
++ } else if (strcasecmp(mech, "ocsp") == 0) {
++ if (!ok) {
++ ok = tls_verify_ocsp(ok, ctx);
++
++ } else {
++ break;
++ }
++ }
++ }
++
++ } else {
++ /* If no TLSVerifyOrder was specified, default to the old behavior of
++ * always checking CRLs, if configured, and not paying attention to
++ * any AIA attributes (i.e. no use of OCSP).
++ */
++ ok = tls_verify_crl(ok, ctx);
++ }
++
++ if (!ok) {
++ X509 *cert = X509_STORE_CTX_get_current_cert(ctx);
++ int depth = X509_STORE_CTX_get_error_depth(ctx);
++
++ tls_log("error: unable to verify certificate at depth %d", depth);
++ tls_log("error: cert subject: %s", tls_x509_name_oneline(
++ X509_get_subject_name(cert)));
++ tls_log("error: cert issuer: %s", tls_x509_name_oneline(
++ X509_get_issuer_name(cert)));
++
++ /* Catch a too long certificate chain here. */
++ if (depth > tls_verify_depth)
++ X509_STORE_CTX_set_error(ctx, X509_V_ERR_CERT_CHAIN_TOO_LONG);
++
++ switch (ctx->error) {
++ case X509_V_ERR_CERT_CHAIN_TOO_LONG:
++ case X509_V_ERR_CERT_HAS_EXPIRED:
++ case X509_V_ERR_CERT_REVOKED:
++ case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
++ case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
++ case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
++ case X509_V_ERR_APPLICATION_VERIFICATION:
++ tls_log("client certificate failed verification: %s",
++ X509_verify_cert_error_string(ctx->error));
++ ok = 0;
++ break;
++
++ case X509_V_ERR_INVALID_PURPOSE: {
++ register unsigned int i;
++ int count = X509_PURPOSE_get_count();
++
++ tls_log("client certificate failed verification: %s",
++ X509_verify_cert_error_string(ctx->error));
++
++ for (i = 0; i < count; i++) {
++ X509_PURPOSE *purp = X509_PURPOSE_get0(i);
++ tls_log(" purpose #%d: %s", i+1, X509_PURPOSE_get0_name(purp));
++ }
++
++ ok = 0;
++ break;
++ }
++
++ case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
++ /* XXX this is strange. we get this error for certain clients
++ * (i.e. Jeff Altman's kftp) when all is ok. I think it's because the
++ * client is actually sending the whole CA cert. This must be figured
++ * out, but we let it pass for now. If the CA cert isn't available
++ * locally, we will fail anyway.
++ */
++ tls_log("%s", X509_verify_cert_error_string(ctx->error));
++ ok = 1;
++ break;
++
++ default:
++ tls_log("error verifying client certificate: [%d] %s",
++ ctx->error, X509_verify_cert_error_string(ctx->error));
++ ok = 0;
++ break;
++ }
++ }
++
++ return ok;
++}
++
++/* This routine is (very much!) based on the work by Ralf S. Engelschall
++ * <rse at engelshall.com>. Comments by Ralf.
++ */
++static int tls_verify_crl(int ok, X509_STORE_CTX *ctx) {
++ X509_OBJECT obj;
++ X509_NAME *subject = NULL, *issuer = NULL;
++ X509 *xs = NULL;
++ X509_CRL *crl = NULL;
++ X509_STORE_CTX store_ctx;
++ int n, rc;
++ register int i = 0;
++
++ /* Unless a revocation store for CRLs was created we cannot do any
++ * CRL-based verification, of course.
++ */
++ if (!tls_crl_store) {
++ return ok;
++ }
++
++ tls_log("CRL store present, checking client certificate against configured "
++ "CRLs");
++
++ /* Determine certificate ingredients in advance.
++ */
++ xs = X509_STORE_CTX_get_current_cert(ctx);
++ subject = X509_get_subject_name(xs);
++ issuer = X509_get_issuer_name(xs);
++
++ /* OpenSSL provides the general mechanism to deal with CRLs but does not
++ * use them automatically when verifying certificates, so we do it
++ * explicitly here. We will check the CRL for the currently checked
++ * certificate, if there is such a CRL in the store.
++ *
++ * We come through this procedure for each certificate in the certificate
++ * chain, starting with the root-CA's certificate. At each step we've to
++ * both verify the signature on the CRL (to make sure it's a valid CRL)
++ * and its revocation list (to make sure the current certificate isn't
++ * revoked). But because to check the signature on the CRL we need the
++ * public key of the issuing CA certificate (which was already processed
++ * one round before), we've a little problem. But we can both solve it and
++ * at the same time optimize the processing by using the following
++ * verification scheme (idea and code snippets borrowed from the GLOBUS
++ * project):
++ *
++ * 1. We'll check the signature of a CRL in each step when we find a CRL
++ * through the _subject_ name of the current certificate. This CRL
++ * itself will be needed the first time in the next round, of course.
++ * But we do the signature processing one round before this where the
++ * public key of the CA is available.
++ *
++ * 2. We'll check the revocation list of a CRL in each step when
++ * we find a CRL through the _issuer_ name of the current certificate.
++ * This CRLs signature was then already verified one round before.
++ *
++ * This verification scheme allows a CA to revoke its own certificate as
++ * well, of course.
++ */
++
++ /* Try to retrieve a CRL corresponding to the _subject_ of
++ * the current certificate in order to verify its integrity.
++ */
++ memset(&obj, 0, sizeof(obj));
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ if (X509_STORE_CTX_init(&store_ctx, tls_crl_store, NULL, NULL) <= 0) {
++ tls_log("error initializing CRL store context: %s", tls_get_errors());
++ return ok;
++ }
++#else
++ X509_STORE_CTX_init(&store_ctx, tls_crl_store, NULL, NULL);
++#endif
++
++ rc = X509_STORE_get_by_subject(&store_ctx, X509_LU_CRL, subject, &obj);
++ crl = obj.data.crl;
++
++ if (rc > 0 &&
++ crl != NULL) {
++ EVP_PKEY *pubkey;
++ char buf[512];
++ int len;
++ BIO *b = BIO_new(BIO_s_mem());
++
++ BIO_printf(b, "CA CRL: Issuer: ");
++ X509_NAME_print(b, issuer, 0);
++
++ BIO_printf(b, ", lastUpdate: ");
++ ASN1_UTCTIME_print(b, crl->crl->lastUpdate);
++
++ BIO_printf(b, ", nextUpdate: ");
++ ASN1_UTCTIME_print(b, crl->crl->nextUpdate);
++
++ len = BIO_read(b, buf, sizeof(buf) - 1);
++ if (len >= sizeof(buf)) {
++ len = sizeof(buf)-1;
++ }
++ buf[len] = '\0';
++
++ BIO_free(b);
++
++ tls_log("%s", buf);
++
++ pubkey = X509_get_pubkey(xs);
++
++ /* Verify the signature on this CRL */
++ if (X509_CRL_verify(crl, pubkey) <= 0) {
++ tls_log("invalid signature on CRL: %s", tls_get_errors());
++ if (pubkey)
++ EVP_PKEY_free(pubkey);
++
++ X509_STORE_CTX_set_error(ctx, X509_V_ERR_CRL_SIGNATURE_FAILURE);
++ X509_OBJECT_free_contents(&obj);
++ X509_STORE_CTX_cleanup(&store_ctx);
++ return 0;
++ }
++
++ if (pubkey)
++ EVP_PKEY_free(pubkey);
++
++ /* Check date of CRL to make sure it's not expired */
++ i = X509_cmp_current_time(X509_CRL_get_nextUpdate(crl));
++ if (i == 0) {
++ tls_log("CRL has invalid nextUpdate field: %s", tls_get_errors());
++ X509_STORE_CTX_set_error(ctx, X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD);
++ X509_OBJECT_free_contents(&obj);
++ X509_STORE_CTX_cleanup(&store_ctx);
++ return 0;
++ }
++
++ if (i < 0) {
++ /* XXX This is a bit draconian, rejecting all certificates if the CRL
++ * has expired.
++ */
++ tls_log("%s", "CRL is expired, revoking all certificates until an "
++ "updated CRL is obtained");
++ X509_STORE_CTX_set_error(ctx, X509_V_ERR_CRL_HAS_EXPIRED);
++ X509_OBJECT_free_contents(&obj);
++ X509_STORE_CTX_cleanup(&store_ctx);
++ return 0;
++ }
++
++ X509_OBJECT_free_contents(&obj);
++ }
++
++ /* Try to retrieve a CRL corresponding to the _issuer_ of
++ * the current certificate in order to check for revocation.
++ */
++ memset(&obj, 0, sizeof(obj));
++
++ rc = X509_STORE_get_by_subject(&store_ctx, X509_LU_CRL, issuer, &obj);
++ crl = obj.data.crl;
++
++ if (rc > 0 &&
++ crl != NULL) {
++
++ /* Check if the current certificate is revoked by this CRL */
++ n = sk_X509_REVOKED_num(X509_CRL_get_REVOKED(crl));
++
++ for (i = 0; i < n; i++) {
++ X509_REVOKED *revoked;
++ ASN1_INTEGER *sn;
++
++ revoked = sk_X509_REVOKED_value(X509_CRL_get_REVOKED(crl), i);
++ sn = revoked->serialNumber;
++
++ if (ASN1_INTEGER_cmp(sn, X509_get_serialNumber(xs)) == 0) {
++ long serial = ASN1_INTEGER_get(sn);
++ char *cp = tls_x509_name_oneline(issuer);
++
++ tls_log("certificate with serial number %ld (0x%lX) revoked per CRL "
++ "from issuer '%s'", serial, serial, cp ? cp : "(ERROR)");
++
++ X509_STORE_CTX_set_error(ctx, X509_V_ERR_CERT_REVOKED);
++ X509_OBJECT_free_contents(&obj);
++ X509_STORE_CTX_cleanup(&store_ctx);
++ return 0;
++ }
++ }
++
++ X509_OBJECT_free_contents(&obj);
++ }
++
++ X509_STORE_CTX_cleanup(&store_ctx);
++ return ok;
++}
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++static int tls_verify_ocsp_url(X509_STORE_CTX *ctx, X509 *cert,
++ const char *url) {
++ BIO *conn;
++ X509 *issuing_cert = NULL;
++ X509_NAME *subj = NULL;
++ const char *subj_name;
++ char *host = NULL, *port = NULL, *uri = NULL;
++ int res = 0, use_ssl = 0, ocsp_status, ocsp_reason;
++ OCSP_REQUEST *req = NULL;
++ OCSP_CERTID *cert_id = NULL;
++ OCSP_RESPONSE *resp = NULL;
++ OCSP_BASICRESP *basic_resp = NULL;
++
++ if (cert == NULL ||
++ url == NULL) {
++ return res;
++ }
++
++ subj = X509_get_subject_name(cert);
++ subj_name = tls_x509_name_oneline(subj);
++
++ tls_log("checking OCSP URL '%s' for client cert '%s'", url, subj_name);
++
++ if (OCSP_parse_url((char *) url, &host, &port, &uri, &use_ssl) != 1) {
++ tls_log("error parsing OCSP URL '%s': %s", url, tls_get_errors());
++ return res;
++ }
++
++ tls_log("connecting to OCSP responder at host '%s', port '%s', URI '%s'%s",
++ host, port, uri, use_ssl ? ", using SSL/TLS" : "");
++
++ /* Connect to the OCSP responder indicated */
++ conn = BIO_new_connect(host);
++ if (conn == NULL) {
++ tls_log("error creating connection BIO: %s", tls_get_errors());
++
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ BIO_set_conn_port(conn, port);
++
++ if (BIO_do_connect(conn) != 1) {
++ tls_log("error connecting to OCSP URL '%s': %s", url, tls_get_errors());
++
++ BIO_free_all(conn);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ if (X509_STORE_CTX_get1_issuer(&issuing_cert, ctx, cert) != 1) {
++ tls_log("error retrieving issuing cert for client cert '%s': %s",
++ subj_name, tls_get_errors());
++
++ BIO_free_all(conn);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ /* Note that the cert_id value will be freed when the request is freed. */
++ cert_id = OCSP_cert_to_id(NULL, cert, issuing_cert);
++ if (cert_id == NULL) {
++ const char *issuer_subj_name = tls_x509_name_oneline(
++ X509_get_subject_name(issuing_cert));
++
++ tls_log("error converting client cert '%s' and its issuing cert '%s' "
++ "to an OCSP cert ID: %s", subj_name, issuer_subj_name, tls_get_errors());
++
++ X509_free(issuing_cert);
++ BIO_free_all(conn);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ req = OCSP_REQUEST_new();
++ if (req == NULL) {
++ tls_log("unable to allocate OCSP request: %s", tls_get_errors());
++
++ X509_free(issuing_cert);
++ BIO_free_all(conn);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ if (OCSP_request_add0_id(req, cert_id) == NULL) {
++ tls_log("error adding cert ID to OCSP request: %s", tls_get_errors());
++
++ OCSP_REQUEST_free(req);
++ X509_free(issuing_cert);
++ BIO_free_all(conn);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++# if 0
++ /* XXX ideally we would set the requestor name to the subject name of the
++ * cert configured via TLS{DSA,RSA}CertificateFile here.
++ */
++ if (OCSP_request_set1_name(req, /* server cert X509_NAME subj name */) != 1) {
++ tls_log("error adding requestor name '%s' to OCSP request: %s",
++ requestor_name, tls_get_errors());
++
++ OCSP_REQUEST_free(req);
++ X509_free(issuing_cert);
++ BIO_free_all(conn);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++ return res;
++ }
++# endif
++
++ if (OCSP_request_add1_nonce(req, NULL, 0) != 1) {
++ tls_log("error adding nonce to OCSP request: %s", tls_get_errors());
++
++ OCSP_REQUEST_free(req);
++ X509_free(issuing_cert);
++ BIO_free_all(conn);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ if (tls_opts & TLS_OPT_ENABLE_DIAGS) {
++ BIO *mem;
++
++ mem = BIO_new(BIO_s_mem());
++ if (OCSP_REQUEST_print(mem, req, 0) == 1) {
++ char *data = NULL;
++ long datalen;
++
++ datalen = BIO_get_mem_data(mem, &data);
++ if (data) {
++ data[datalen] = '\0';
++ tls_log("sending OCSP request:\n%s", data);
++ }
++ }
++
++ BIO_free(mem);
++ }
++
++ resp = OCSP_sendreq_bio(conn, uri, req);
++
++ /* Done with the connection BIO now. */
++ BIO_free_all(conn);
++
++ if (resp == NULL) {
++ tls_log("error receiving response from OCSP responder at '%s': %s", url,
++ tls_get_errors());
++
++ OCSP_REQUEST_free(req);
++ X509_free(issuing_cert);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ if (tls_opts & TLS_OPT_ENABLE_DIAGS) {
++ BIO *mem;
++
++ mem = BIO_new(BIO_s_mem());
++ if (OCSP_RESPONSE_print(mem, resp, 0) == 1) {
++ char *data = NULL;
++ long datalen;
++
++ datalen = BIO_get_mem_data(mem, &data);
++ if (data) {
++ data[datalen] = '\0';
++ tls_log("received OCSP response:\n%s", data);
++ }
++ }
++
++ BIO_free(mem);
++ }
++
++ tls_log("checking response from OCSP responder at URL '%s' for client cert "
++ "'%s'", url, subj_name);
++
++ ocsp_status = OCSP_response_status(resp);
++ if (ocsp_status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
++ tls_log("unable to verify client cert '%s' via OCSP responder at '%s': "
++ "response status '%s'", subj_name, url,
++ OCSP_response_status_str(ocsp_status));
++
++ OCSP_RESPONSE_free(resp);
++ OCSP_REQUEST_free(req);
++ X509_free(issuing_cert);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ basic_resp = OCSP_response_get1_basic(resp);
++ if (basic_resp == NULL) {
++ tls_log("error retrieving basic response from OCSP responder at '%s': %s",
++ url, tls_get_errors());
++
++ OCSP_RESPONSE_free(resp);
++ OCSP_REQUEST_free(req);
++ X509_free(issuing_cert);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ if (OCSP_check_nonce(req, basic_resp) != 1) {
++ tls_log("unable to use response from OCSP responder at '%s': bad nonce",
++ url);
++
++ OCSP_BASICRESP_free(basic_resp);
++ OCSP_RESPONSE_free(resp);
++ OCSP_REQUEST_free(req);
++ X509_free(issuing_cert);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ /* Done with the request now. */
++ OCSP_REQUEST_free(req);
++
++ if (OCSP_basic_verify(basic_resp, NULL, ctx->ctx, 0) != 1) {
++ tls_log("error verifying basic response from OCSP responder at '%s': %s",
++ url, tls_get_errors());
++
++ OCSP_BASICRESP_free(basic_resp);
++ OCSP_RESPONSE_free(resp);
++ X509_free(issuing_cert);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ if (OCSP_resp_find_status(basic_resp, cert_id, &ocsp_status,
++ &ocsp_reason, NULL, NULL, NULL) != 1) {
++ tls_log("unable to retrieve cert status from OCSP response: %s",
++ tls_get_errors());
++
++ OCSP_BASICRESP_free(basic_resp);
++ OCSP_RESPONSE_free(resp);
++ X509_free(issuing_cert);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++ }
++
++ tls_log("client cert '%s' has '%s' status according to OCSP responder at "
++ "'%s'", subj_name, OCSP_cert_status_str(ocsp_status), url);
++
++ if (ocsp_status == V_OCSP_CERTSTATUS_GOOD) {
++ res = 1;
++ }
++
++ if (ocsp_status == V_OCSP_CERTSTATUS_REVOKED) {
++ tls_log("client cert '%s' has '%s' status due to: %s", subj_name,
++ OCSP_cert_status_str(ocsp_status), OCSP_crl_reason_str(ocsp_reason));
++ }
++
++ OCSP_BASICRESP_free(basic_resp);
++ OCSP_RESPONSE_free(resp);
++ X509_free(issuing_cert);
++ OPENSSL_free(host);
++ OPENSSL_free(port);
++ OPENSSL_free(uri);
++
++ return res;
++}
++#endif
++
++static int tls_verify_ocsp(int ok, X509_STORE_CTX *ctx) {
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ register unsigned int i;
++ X509 *cert;
++ const char *subj;
++ STACK_OF(ACCESS_DESCRIPTION) *descs;
++ pool *tmp_pool = NULL;
++ array_header *ocsp_urls = NULL;
++
++ /* Set a default verification error here; it will be superceded as needed
++ * later during the verification process.
++ */
++ X509_STORE_CTX_set_error(ctx, X509_V_ERR_APPLICATION_VERIFICATION);
++
++ cert = X509_STORE_CTX_get_current_cert(ctx);
++ if (cert == NULL) {
++ return ok;
++ }
++
++ subj = tls_x509_name_oneline(X509_get_subject_name(cert));
++
++ descs = X509_get_ext_d2i(cert, NID_info_access, NULL, NULL);
++ if (descs == NULL) {
++ tls_log("Client cert '%s' contained no AuthorityInfoAccess attribute, "
++ "unable to verify via OCSP", subj);
++ return ok;
++ }
++
++ for (i = 0; i < sk_ACCESS_DESCRIPTION_num(descs); i++) {
++ ACCESS_DESCRIPTION *desc = sk_ACCESS_DESCRIPTION_value(descs, i);
++
++ if (OBJ_obj2nid(desc->method) == NID_ad_OCSP) {
++ /* Found an OCSP AuthorityInfoAccess attribute */
++
++ if (desc->location->type != GEN_URI) {
++ /* Not a valid URI, ignore it. */
++ continue;
++ }
++
++ /* Add this URL to the list of OCSP URLs to check. */
++ if (ocsp_urls == NULL) {
++ tmp_pool = make_sub_pool(session.pool);
++ ocsp_urls = make_array(tmp_pool, 1, sizeof(char *));
++ }
++
++ *((char **) push_array(ocsp_urls)) = pstrdup(tmp_pool,
++ (char *) desc->location->d.uniformResourceIdentifier->data);
++ }
++ }
++
++ if (ocsp_urls) {
++ tls_log("Found %u OCSP URLs in AuthorityInfoAccess attribute for client "
++ "cert '%s'", ocsp_urls->nelts, subj);
++
++ } else {
++ tls_log("Found no OCSP URLs in AuthorityInfoAccess attribute for client "
++ "cert '%s', unable to verify via OCSP", subj);
++ AUTHORITY_INFO_ACCESS_free(descs);
++ return ok;
++ }
++
++ /* Check each of the URLs. */
++ for (i = 0; i < ocsp_urls->nelts; i++) {
++ char *url = ((char **) ocsp_urls->elts)[i];
++
++ ok = tls_verify_ocsp_url(ctx, cert, url);
++ if (ok)
++ break;
++ }
++
++ destroy_pool(tmp_pool);
++ AUTHORITY_INFO_ACCESS_free(descs);
++
++ return ok;
++#else
++ return ok;
++#endif
++}
++
++static ssize_t tls_write(SSL *ssl, const void *buf, size_t len) {
++ ssize_t count;
++
++ count = SSL_write(ssl, buf, len);
++
++ if (count < 0) {
++ long err = SSL_get_error(ssl, count);
++
++ /* write(2) returns only the generic error number -1 */
++ count = -1;
++
++ switch (err) {
++ case SSL_ERROR_WANT_WRITE:
++ /* Simulate an EINTR in case OpenSSL wants to write more. */
++ errno = EINTR;
++ break;
++
++ default:
++ tls_fatal_error(err, __LINE__);
++ break;
++ }
++ }
++
++ return count;
++}
++
++static char *tls_x509_name_oneline(X509_NAME *x509_name) {
++ static char buf[1024] = {'\0'};
++
++ /* If we are using OpenSSL 0.9.6 or newer, we want to use
++ * X509_NAME_print_ex() instead of X509_NAME_oneline().
++ */
++
++#if OPENSSL_VERSION_NUMBER < 0x000906000L
++ memset(&buf, '\0', sizeof(buf));
++ return X509_NAME_oneline(x509_name, buf, sizeof(buf)-1);
++#else
++
++ /* Sigh...do it the hard way. */
++ BIO *mem = BIO_new(BIO_s_mem());
++ char *data = NULL;
++ long datalen = 0;
++ int ok;
++
++ ok = X509_NAME_print_ex(mem, x509_name, 0, XN_FLAG_ONELINE);
++ if (ok) {
++ datalen = BIO_get_mem_data(mem, &data);
++
++ if (data) {
++ memset(&buf, '\0', sizeof(buf));
++
++ if (datalen >= sizeof(buf)) {
++ datalen = sizeof(buf)-1;
++ }
++
++ memcpy(buf, data, datalen);
++
++ buf[datalen] = '\0';
++ buf[sizeof(buf)-1] = '\0';
++
++ BIO_free(mem);
++ return buf;
++ }
++ }
++
++ BIO_free(mem);
++ return NULL;
++#endif /* OPENSSL_VERSION_NUMBER >= 0x000906000 */
++}
++
++/* Session cache API */
++
++struct tls_scache {
++ struct tls_scache *next, *prev;
++
++ const char *name;
++ tls_sess_cache_t *cache;
++};
++
++static pool *tls_sess_cache_pool = NULL;
++static struct tls_scache *tls_sess_caches = NULL;
++static unsigned int tls_sess_ncaches = 0;
++
++int tls_sess_cache_register(const char *name, tls_sess_cache_t *cache) {
++ struct tls_scache *sc;
++
++ if (name == NULL ||
++ cache == NULL) {
++ errno = EINVAL;
++ return -1;
++ }
++
++ if (tls_sess_cache_pool == NULL) {
++ tls_sess_cache_pool = make_sub_pool(permanent_pool);
++ pr_pool_tag(tls_sess_cache_pool, "TLS Session Cache API Pool");
++ }
++
++ /* Make sure this cache has not already been registered. */
++ if (tls_sess_cache_get_cache(name) != NULL) {
++ errno = EEXIST;
++ return -1;
++ }
++
++ sc = pcalloc(tls_sess_cache_pool, sizeof(struct tls_scache));
++
++ /* XXX Should this name string be dup'd from the tls_sess_cache_pool? */
++ sc->name = name;
++ cache->cache_name = pstrdup(tls_sess_cache_pool, name);
++ sc->cache = cache;
++
++ if (tls_sess_caches) {
++ sc->next = tls_sess_caches;
++
++ } else {
++ sc->next = NULL;
++ }
++
++ tls_sess_caches = sc;
++ tls_sess_ncaches++;
++
++ return 0;
++}
++
++int tls_sess_cache_unregister(const char *name) {
++ struct tls_scache *sc;
++
++ if (name == NULL) {
++ errno = EINVAL;
++ return -1;
++ }
++
++ for (sc = tls_sess_caches; sc; sc = sc->next) {
++ if (strcmp(sc->name, name) == 0) {
++
++ if (sc->prev) {
++ sc->prev->next = sc->next;
++
++ } else {
++ /* If prev is NULL, this is the head of the list. */
++ tls_sess_caches = sc->next;
++ }
++
++ if (sc->next)
++ sc->next->prev = sc->prev;
++
++ sc->next = sc->prev = NULL;
++ tls_sess_ncaches--;
++
++ /* NOTE: a counter should be kept of the number of unregistrations,
++ * as the memory for a registration is not freed on unregistration.
++ */
++
++ return 0;
++ }
++ }
++
++ errno = ENOENT;
++ return -1;
++}
++
++static tls_sess_cache_t *tls_sess_cache_get_cache(const char *name) {
++ struct tls_scache *sc;
++
++ if (name == NULL) {
++ errno = EINVAL;
++ return NULL;
++ }
++
++ for (sc = tls_sess_caches; sc; sc = sc->next) {
++ if (strcmp(sc->name, name) == 0) {
++ return sc->cache;
++ }
++ }
++
++ errno = ENOENT;
++ return NULL;
++}
++
++static long tls_sess_cache_get_cache_mode(void) {
++ if (tls_sess_cache == NULL) {
++ return 0;
++ }
++
++ return tls_sess_cache->cache_mode;
++}
++
++static int tls_sess_cache_open(char *info, long timeout) {
++ int res;
++
++ if (tls_sess_cache == NULL) {
++ errno = ENOSYS;
++ return -1;
++ }
++
++ res = (tls_sess_cache->open)(tls_sess_cache, info, timeout);
++ return res;
++}
++
++static int tls_sess_cache_close(void) {
++ int res;
++
++ if (tls_sess_cache == NULL) {
++ errno = ENOSYS;
++ return -1;
++ }
++
++ res = (tls_sess_cache->close)(tls_sess_cache);
++ return res;
++}
++
++#ifdef PR_USE_CTRLS
++static int tls_sess_cache_clear(void) {
++ int res;
++
++ if (tls_sess_cache == NULL) {
++ errno = ENOSYS;
++ return -1;
++ }
++
++ res = (tls_sess_cache->clear)(tls_sess_cache);
++ return res;
++}
++
++static int tls_sess_cache_remove(void) {
++ int res;
++
++ if (tls_sess_cache == NULL) {
++ errno = ENOSYS;
++ return -1;
++ }
++
++ res = (tls_sess_cache->remove)(tls_sess_cache);
++ return res;
++}
++
++static void sess_cache_printf(void *ctrl, const char *fmt, ...) {
++ char buf[PR_TUNABLE_BUFFER_SIZE];
++ va_list msg;
++
++ memset(buf, '\0', sizeof(buf));
++
++ va_start(msg, fmt);
++ vsnprintf(buf, sizeof(buf), fmt, msg);
++ va_end(msg);
++
++ buf[sizeof(buf)-1] = '\0';
++ pr_ctrls_add_response(ctrl, "%s", buf);
++}
++
++static int tls_sess_cache_status(pr_ctrls_t *ctrl, int flags) {
++ int res = 0;
++
++ if (tls_sess_cache != NULL) {
++ res = (tls_sess_cache->status)(tls_sess_cache, sess_cache_printf, ctrl,
++ flags);
++ return res;
++ }
++
++ pr_ctrls_add_response(ctrl, "No TLSSessionCache configured");
++ return res;
++}
++
++static int tls_handle_clear(pr_ctrls_t *ctrl, int reqargc, char **reqargv) {
++ int res;
++
++ res = tls_sess_cache_clear();
++ if (res < 0) {
++ pr_ctrls_add_response(ctrl,
++ "tls sesscache: error clearing session cache: %s", strerror(errno));
++
++ } else {
++ pr_ctrls_add_response(ctrl, "tls sesscache: cleared %d %s from '%s' "
++ "session cache", res, res != 1 ? "sessions" : "session",
++ tls_sess_cache->cache_name);
++ res = 0;
++ }
++
++ return res;
++}
++
++static int tls_handle_info(pr_ctrls_t *ctrl, int reqargc, char **reqargv) {
++ int flags = 0, optc, res;
++ const char *opts = "v";
++
++ /* All the fun portability of resetting getopt(3). */
++#if defined(FREEBSD4) || defined(FREEBSD5) || \
++ defined(FREEBSD6) || defined(FREEBSD7) || \
++ defined(DARWIN7) || defined(DARWIN8) || defined(DARWIN9)
++ optreset = 1;
++ opterr = 1;
++ optind = 1;
++
++#elif defined(SOLARIS2)
++ opterr = 0;
++ optind = 1;
++
++#else
++ opterr = 0;
++ optind = 0;
++#endif /* !FreeBSD, !Mac OSX and !Solaris2 */
++
++ if (pr_env_get(permanent_pool, "POSIXLY_CORRECT") == NULL) {
++ pr_env_set(permanent_pool, "POSIXLY_CORRECT", "1");
++ }
++
++ while ((optc = getopt(reqargc, reqargv, opts)) != -1) {
++ switch (optc) {
++ case 'v':
++ flags = TLS_SESS_CACHE_STATUS_FL_SHOW_SESSIONS;
++ break;
++
++ case '?':
++ pr_ctrls_add_response(ctrl,
++ "tls sesscache: unsupported parameter: '%s'", reqargv[1]);
++ return -1;
++ }
++ }
++
++ res = tls_sess_cache_status(ctrl, flags);
++ if (res < 0) {
++ pr_ctrls_add_response(ctrl,
++ "tls sesscache: error obtaining session cache status: %s",
++ strerror(errno));
++
++ } else {
++ res = 0;
++ }
++
++ return res;
++}
++
++static int tls_handle_remove(pr_ctrls_t *ctrl, int reqargc, char **reqargv) {
++ int res;
++
++ res = tls_sess_cache_remove();
++ if (res < 0) {
++ pr_ctrls_add_response(ctrl,
++ "tls sesscache: error removing session cache: %s", strerror(errno));
++
++ } else {
++ pr_ctrls_add_response(ctrl, "tls sesscache: removed '%s' session cache",
++ tls_sess_cache->cache_name);
++ res = 0;
++ }
++
++ return res;
++}
++
++static int tls_handle_sesscache(pr_ctrls_t *ctrl, int reqargc, char **reqargv) {
++
++ /* Sanity check */
++ if (reqargc == 0 ||
++ reqargv == NULL) {
++ pr_ctrls_add_response(ctrl, "tls sesscache: missing required parameters");
++ return -1;
++ }
++
++ if (strcmp(reqargv[0], "info") == 0) {
++
++ /* Check the ACLs. */
++ if (!pr_ctrls_check_acl(ctrl, tls_acttab, "info")) {
++ pr_ctrls_add_response(ctrl, "access denied");
++ return -1;
++ }
++
++ return tls_handle_info(ctrl, reqargc, reqargv);
++
++ } else if (strcmp(reqargv[0], "clear") == 0) {
++
++ /* Check the ACLs. */
++ if (!pr_ctrls_check_acl(ctrl, tls_acttab, "clear")) {
++ pr_ctrls_add_response(ctrl, "access denied");
++ return -1;
++ }
++
++ return tls_handle_clear(ctrl, reqargc, reqargv);
++
++ } else if (strcmp(reqargv[0], "remove") == 0) {
++
++ /* Check the ACLs. */
++ if (!pr_ctrls_check_acl(ctrl, tls_acttab, "remove")) {
++ pr_ctrls_add_response(ctrl, "access denied");
++ return -1;
++ }
++
++ return tls_handle_remove(ctrl, reqargc, reqargv);
++ }
++
++ pr_ctrls_add_response(ctrl, "tls sesscache: unknown sesscache action: '%s'",
++ reqargv[0]);
++ return -1;
++}
++
++/* Our main ftpdctl action handler */
++static int tls_handle_tls(pr_ctrls_t *ctrl, int reqargc, char **reqargv) {
++
++ /* Sanity check */
++ if (reqargc == 0 ||
++ reqargv == NULL) {
++ pr_ctrls_add_response(ctrl, "tls: missing required parameters");
++ return -1;
++ }
++
++ if (strcmp(reqargv[0], "sesscache") == 0) {
++
++ /* Check the ACLs. */
++ if (!pr_ctrls_check_acl(ctrl, tls_acttab, "sesscache")) {
++ pr_ctrls_add_response(ctrl, "access denied");
++ return -1;
++ }
++
++ return tls_handle_sesscache(ctrl, --reqargc, ++reqargv);
++ }
++
++ pr_ctrls_add_response(ctrl, "tls: unknown tls action: '%s'", reqargv[0]);
++ return -1;
++}
++#endif
++
++static int tls_sess_cache_add_sess_cb(SSL *ssl, SSL_SESSION *sess) {
++ unsigned char *sess_id;
++ unsigned int sess_id_len;
++ int res;
++ long expires;
++
++ if (tls_sess_cache == NULL) {
++ tls_log("unable to add session to session cache: %s", strerror(ENOSYS));
++
++ SSL_SESSION_free(sess);
++ return 1;
++ }
++
++ SSL_set_timeout(sess, tls_sess_cache->cache_timeout);
++
++#if OPENSSL_VERSION_NUMBER > 0x000908000L
++ sess_id = (unsigned char *) SSL_SESSION_get_id(sess, &sess_id_len);
++#else
++ /* XXX Directly accessing these fields cannot be a Good Thing. */
++ sess_id = sess->session_id;
++ sess_id_len = sess->session_id_length;
++#endif
++
++ /* The expiration timestamp stored in the session cache is the
++ * Unix epoch time, not an interval.
++ */
++ expires = SSL_SESSION_get_time(sess) + tls_sess_cache->cache_timeout;
++
++ res = (tls_sess_cache->add)(tls_sess_cache, sess_id, sess_id_len, expires,
++ sess);
++ if (res < 0) {
++ long cache_mode;
++
++ tls_log("error adding session to '%s' cache: %s",
++ tls_sess_cache->cache_name, strerror(errno));
++
++ cache_mode = tls_sess_cache_get_cache_mode();
++#ifdef SSL_SESS_CACHE_NO_INTERNAL
++ if (cache_mode & SSL_SESS_CACHE_NO_INTERNAL) {
++ /* Call SSL_SESSION_free() here, and return 1. We told OpenSSL that we
++ * are the only cache, so failing to call SSL_SESSION_free() could
++ * result in a memory leak.
++ */
++ SSL_SESSION_free(sess);
++ return 1;
++ }
++#endif /* !SSL_SESS_CACHE_NO_INTERNAL */
++ }
++
++ /* Return zero to indicate to OpenSSL that we have not called
++ * SSL_SESSION_free().
++ */
++ return 0;
++}
++
++static SSL_SESSION *tls_sess_cache_get_sess_cb(SSL *ssl,
++ unsigned char *sess_id, int sess_id_len, int *do_copy) {
++ SSL_SESSION *sess;
++
++ /* Indicate to OpenSSL that the ref count should not be incremented
++ * by setting the do_copy pointer to zero.
++ */
++ *do_copy = 0;
++
++ /* The actual session_id_length field in the OpenSSL SSL_SESSION struct
++ * is unsigned, not signed. But for some reason, the expected callback
++ * signature uses 'int', not 'unsigned int'. Hopefully the implicit
++ * cast below (our callback uses 'unsigned int') won't cause problems.
++ * Just to be sure, check if OpenSSL is giving us a negative ID length.
++ */
++ if (sess_id_len <= 0) {
++ tls_log("OpenSSL invoked SSL session cache 'get' callback with session "
++ "ID length %d, returning null", sess_id_len);
++ return NULL;
++ }
++
++ if (tls_sess_cache == NULL) {
++ tls_log("unable to get session from session cache: %s", strerror(ENOSYS));
++ return NULL;
++ }
++
++ sess = (tls_sess_cache->get)(tls_sess_cache, sess_id, sess_id_len);
++ if (sess == NULL) {
++ tls_log("error retrieving session from '%s' cache: %s",
++ tls_sess_cache->cache_name, strerror(errno));
++ }
++
++ return sess;
++}
++
++static void tls_sess_cache_delete_sess_cb(SSL_CTX *ctx, SSL_SESSION *sess) {
++ unsigned char *sess_id;
++ unsigned int sess_id_len;
++ int res;
++
++ if (tls_sess_cache == NULL) {
++ tls_log("unable to remove session from session cache: %s",
++ strerror(ENOSYS));
++ return;
++ }
++
++#if OPENSSL_VERSION_NUMBER > 0x000908000L
++ sess_id = (unsigned char *) SSL_SESSION_get_id(sess, &sess_id_len);
++#else
++ /* XXX Directly accessing these fields cannot be a Good Thing. */
++ sess_id = sess->session_id;
++ sess_id_len = sess->session_id_length;
++#endif
++
++ res = (tls_sess_cache->delete)(tls_sess_cache, sess_id, sess_id_len);
++ if (res < 0) {
++ tls_log("error removing session from '%s' cache: %s",
++ tls_sess_cache->cache_name, strerror(errno));
++ }
++
++ return;
++}
++
++/* NetIO callbacks
++ */
++
++static void tls_netio_abort_cb(pr_netio_stream_t *nstrm) {
++ nstrm->strm_flags |= PR_NETIO_SESS_ABORT;
++}
++
++static int tls_netio_close_cb(pr_netio_stream_t *nstrm) {
++ int res = 0;
++
++ if (nstrm->strm_data) {
++
++ if (nstrm->strm_type == PR_NETIO_STRM_CTRL &&
++ nstrm->strm_mode == PR_NETIO_IO_WR) {
++ tls_end_sess((SSL *) nstrm->strm_data, nstrm->strm_type, 0);
++ tls_ctrl_rd_nstrm->strm_data = tls_ctrl_wr_nstrm->strm_data =
++ nstrm->strm_data = NULL;
++ tls_ctrl_netio = NULL;
++ tls_flags &= ~TLS_SESS_ON_CTRL;
++ }
++
++ if (nstrm->strm_type == PR_NETIO_STRM_DATA &&
++ nstrm->strm_mode == PR_NETIO_IO_WR) {
++ tls_end_sess((SSL *) nstrm->strm_data, nstrm->strm_type, 0);
++ tls_data_rd_nstrm->strm_data = tls_data_wr_nstrm->strm_data =
++ nstrm->strm_data = NULL;
++ tls_data_netio = NULL;
++ tls_flags &= ~TLS_SESS_ON_DATA;
++ }
++ }
++
++ res = close(nstrm->strm_fd);
++ nstrm->strm_fd = -1;
++
++ return res;
++}
++
++static pr_netio_stream_t *tls_netio_open_cb(pr_netio_stream_t *nstrm, int fd,
++ int mode) {
++ nstrm->strm_fd = fd;
++ nstrm->strm_mode = mode;
++
++ /* Cache a pointer to this stream. */
++ if (nstrm->strm_type == PR_NETIO_STRM_CTRL) {
++ if (nstrm->strm_mode == PR_NETIO_IO_RD)
++ tls_ctrl_rd_nstrm = nstrm;
++
++ if (nstrm->strm_mode == PR_NETIO_IO_WR)
++ tls_ctrl_wr_nstrm = nstrm;
++
++ } else if (nstrm->strm_type == PR_NETIO_STRM_DATA) {
++ if (nstrm->strm_mode == PR_NETIO_IO_RD)
++ tls_data_rd_nstrm = nstrm;
++
++ if (nstrm->strm_mode == PR_NETIO_IO_WR)
++ tls_data_wr_nstrm = nstrm;
++
++ /* Note: from the FTP-TLS Draft 9.2:
++ *
++ * It is quite reasonable for the server to insist that the data
++ * connection uses a TLS cached session. This might be a cache of a
++ * previous data connection or of the control connection. If this is
++ * the reason for the the refusal to allow the data transfer then the
++ * '522' reply should indicate this.
++ *
++ * and, from 10.4:
++ *
++ * If a server needs to have the connection protected then it will
++ * reply to the STOR/RETR/NLST/... command with a '522' indicating
++ * that the current state of the data connection protection level is
++ * not sufficient for that data transfer at that time.
++ *
++ * This points out the need for a module to be able to influence
++ * command response codes in a more flexible manner...
++ */
++ }
++
++ return nstrm;
++}
++
++static int tls_netio_poll_cb(pr_netio_stream_t *nstrm) {
++ fd_set rfds, wfds;
++ struct timeval tval;
++
++ FD_ZERO(&rfds);
++ FD_ZERO(&wfds);
++
++ if (nstrm->strm_mode == PR_NETIO_IO_RD)
++ FD_SET(nstrm->strm_fd, &rfds);
++
++ else
++ FD_SET(nstrm->strm_fd, &wfds);
++
++ tval.tv_sec = (nstrm->strm_flags & PR_NETIO_SESS_INTR) ?
++ nstrm->strm_interval : 10;
++ tval.tv_usec = 0;
++
++ return select(nstrm->strm_fd + 1, &rfds, &wfds, NULL, &tval);
++}
++
++static int tls_netio_postopen_cb(pr_netio_stream_t *nstrm) {
++
++ /* If this is a data stream, and it's for writing, and TLS is required,
++ * then do a TLS handshake.
++ */
++
++ if (nstrm->strm_type == PR_NETIO_STRM_DATA &&
++ nstrm->strm_mode == PR_NETIO_IO_WR) {
++
++ /* Enforce the "data" part of TLSRequired, if configured. */
++ if (tls_required_on_data == 1 ||
++ (tls_flags & TLS_SESS_NEED_DATA_PROT)) {
++ X509 *ctrl_cert = NULL, *data_cert = NULL;
++
++ tls_log("%s", "starting TLS negotiation on data connection");
++ if (tls_accept(session.d, TRUE) < 0) {
++ tls_log("%s", "unable to open data connection: TLS negotiation failed");
++ session.d->xerrno = EPERM;
++ return -1;
++ }
++
++ /* Make sure that the certificate used, if any, for this data channel
++ * handshake is the same as that used for the control channel handshake.
++ * This may be too strict of a requirement, though.
++ */
++ ctrl_cert = SSL_get_peer_certificate(ctrl_ssl);
++ data_cert = SSL_get_peer_certificate((SSL *) nstrm->strm_data);
++
++ if (ctrl_cert && data_cert) {
++ if (X509_cmp(ctrl_cert, data_cert)) {
++ X509_free(ctrl_cert);
++ X509_free(data_cert);
++
++ /* Properly shutdown the SSL session. */
++ tls_end_sess((SSL *) nstrm->strm_data, nstrm->strm_type, 0);
++
++ tls_data_rd_nstrm->strm_data = tls_data_wr_nstrm->strm_data =
++ nstrm->strm_data = NULL;
++
++ tls_log("%s", "unable to open data connection: control/data "
++ "certificate mismatch");
++
++ session.d->xerrno = EPERM;
++ return -1;
++ }
++ }
++
++#if OPENSSL_VERSION_NUMBER < 0x0090702fL
++ /* Make sure blinding is turned on. (For some reason, this only seems
++ * to be allowed on SSL objects, not on SSL_CTX objects. Bummer).
++ */
++ tls_blinding_on((SSL *) nstrm->strm_data);
++#endif
++
++ if (ctrl_cert)
++ X509_free(ctrl_cert);
++
++ if (data_cert)
++ X509_free(data_cert);
++
++ tls_flags |= TLS_SESS_ON_DATA;
++ }
++ }
++
++ return 0;
++}
++
++static int tls_netio_read_cb(pr_netio_stream_t *nstrm, char *buf,
++ size_t buflen) {
++
++ if (nstrm->strm_data)
++ return tls_read((SSL *) nstrm->strm_data, buf, buflen);
++
++ return read(nstrm->strm_fd, buf, buflen);
++}
++
++static pr_netio_stream_t *tls_netio_reopen_cb(pr_netio_stream_t *nstrm, int fd,
++ int mode) {
++
++ if (nstrm->strm_fd != -1)
++ close(nstrm->strm_fd);
++
++ nstrm->strm_fd = fd;
++ nstrm->strm_mode = mode;
++
++ /* NOTE: a no-op? */
++ return nstrm;
++}
++
++static int tls_netio_shutdown_cb(pr_netio_stream_t *nstrm, int how) {
++
++ if (how == 1 ||
++ how == 2) {
++ /* Closing this stream for writing; we need to send the 'close_notify'
++ * alert first, so that the client knows, at the application layer,
++ * that the SSL/TLS session is shutting down.
++ */
++
++ if (nstrm->strm_mode == PR_NETIO_IO_WR &&
++ (nstrm->strm_type == PR_NETIO_STRM_CTRL ||
++ nstrm->strm_type == PR_NETIO_STRM_DATA)) {
++ SSL *ssl;
++
++ ssl = (SSL *) nstrm->strm_data;
++ if (ssl) {
++ if (!(SSL_get_shutdown(ssl) & SSL_SENT_SHUTDOWN)) {
++ /* We haven't sent a 'close_notify' alert yet; do so now. */
++ SSL_shutdown(ssl);
++ }
++ }
++ }
++ }
++
++ return shutdown(nstrm->strm_fd, how);
++}
++
++static int tls_netio_write_cb(pr_netio_stream_t *nstrm, char *buf,
++ size_t buflen) {
++
++ if (nstrm->strm_data) {
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ if (tls_data_renegotiate_limit &&
++ session.xfer.total_bytes >= tls_data_renegotiate_limit
++
++#if OPENSSL_VERSION_NUMBER >= 0x009080cfL
++ /* In OpenSSL-0.9.8l and later, SSL session renegotiations
++ * (both client- and server-initiated) are automatically disabled.
++ * Unless the admin explicitly configured support for
++ * client-initiated renegotations via the AllowClientRenegotiations
++ * TLSOption, we can't request renegotiations ourselves.
++ */
++ && (tls_opts & TLS_OPT_ALLOW_CLIENT_RENEGOTIATIONS)
++#endif
++ ) {
++
++ tls_flags |= TLS_SESS_DATA_RENEGOTIATING;
++
++ tls_log("requesting TLS renegotiation on data channel "
++ "(%" PR_LU " KB data limit)",
++ (pr_off_t) (tls_data_renegotiate_limit / 1024));
++ SSL_renegotiate((SSL *) nstrm->strm_data);
++ /* SSL_do_handshake((SSL *) nstrm->strm_data); */
++
++ pr_timer_add(tls_renegotiate_timeout, 0, &tls_module,
++ tls_renegotiate_timeout_cb, "SSL/TLS renegotiation");
++ }
++#endif
++
++ return tls_write((SSL *) nstrm->strm_data, buf, buflen);
++ }
++
++ return write(nstrm->strm_fd, buf, buflen);
++}
++
++static void tls_netio_install_ctrl(void) {
++ pr_netio_t *netio;
++
++ if (tls_ctrl_netio) {
++ /* If we already have our ctrl netio, then it's been registered, and
++ * we don't need to do anything more.
++ */
++ return;
++ }
++
++ tls_ctrl_netio = netio = pr_alloc_netio(permanent_pool);
++
++ netio->abort = tls_netio_abort_cb;
++ netio->close = tls_netio_close_cb;
++ netio->open = tls_netio_open_cb;
++ netio->poll = tls_netio_poll_cb;
++ netio->postopen = tls_netio_postopen_cb;
++ netio->read = tls_netio_read_cb;
++ netio->reopen = tls_netio_reopen_cb;
++ netio->shutdown = tls_netio_shutdown_cb;
++ netio->write = tls_netio_write_cb;
++
++ pr_unregister_netio(PR_NETIO_STRM_CTRL);
++
++ if (pr_register_netio(netio, PR_NETIO_STRM_CTRL) < 0)
++ pr_log_pri(PR_LOG_INFO, MOD_TLS_VERSION ": error registering netio: %s",
++ strerror(errno));
++}
++
++static void tls_netio_install_data(void) {
++ pr_netio_t *netio = tls_data_netio ? tls_data_netio :
++ (tls_data_netio = pr_alloc_netio(session.pool ? session.pool :
++ permanent_pool));
++
++ netio->abort = tls_netio_abort_cb;
++ netio->close = tls_netio_close_cb;
++ netio->open = tls_netio_open_cb;
++ netio->poll = tls_netio_poll_cb;
++ netio->postopen = tls_netio_postopen_cb;
++ netio->read = tls_netio_read_cb;
++ netio->reopen = tls_netio_reopen_cb;
++ netio->shutdown = tls_netio_shutdown_cb;
++ netio->write = tls_netio_write_cb;
++
++ pr_unregister_netio(PR_NETIO_STRM_DATA);
++
++ if (pr_register_netio(netio, PR_NETIO_STRM_DATA) < 0)
++ pr_log_pri(PR_LOG_INFO, MOD_TLS_VERSION ": error registering netio: %s",
++ strerror(errno));
++}
++
++/* Logging functions
++ */
++
++static void tls_closelog(void) {
++
++ /* Sanity check */
++ if (tls_logfd != -1) {
++ close(tls_logfd);
++ tls_logfd = -1;
++ tls_logname = NULL;
++ }
++
++ return;
++}
++
++int tls_log(const char *fmt, ...) {
++ va_list msg;
++ int res;
++
++ /* Sanity check */
++ if (!tls_logname)
++ return 0;
++
++ va_start(msg, fmt);
++ res = pr_log_vwritefile(tls_logfd, MOD_TLS_VERSION, fmt, msg);
++ va_end(msg);
++
++ return res;
++}
++
++static int tls_openlog(void) {
++ int res = 0;
++
++ /* Sanity checks */
++ tls_logname = get_param_ptr(main_server->conf, "TLSLog", FALSE);
++ if (tls_logname == NULL)
++ return 0;
++
++ if (strcasecmp(tls_logname, "none") == 0) {
++ tls_logname = NULL;
++ return 0;
++ }
++
++ pr_signals_block();
++ PRIVS_ROOT
++ res = pr_log_openfile(tls_logname, &tls_logfd, 0600);
++ PRIVS_RELINQUISH
++ pr_signals_unblock();
++
++ return res;
++}
++
++/* Authentication handlers
++ */
++
++/* This function does the main authentication work, and is called in the
++ * normal course of events:
++ *
++ * cmd->argv[0]: user name
++ * cmd->argv[1]: cleartext password
++ */
++MODRET tls_authenticate(cmd_rec *cmd) {
++ if (!tls_engine)
++ return PR_DECLINED(cmd);
++
++ /* Possible authentication combinations:
++ *
++ * TLS handshake + passwd (default)
++ * TLS handshake + .tlslogin (passwd ignored)
++ */
++
++ if ((tls_flags & TLS_SESS_ON_CTRL) &&
++ (tls_opts & TLS_OPT_ALLOW_DOT_LOGIN)) {
++
++ if (tls_dotlogin_allow(cmd->argv[0])) {
++ tls_log("TLS/X509 .tlslogin check successful for user '%s'",
++ cmd->argv[0]);
++ pr_log_auth(PR_LOG_NOTICE, "USER %s: TLS/X509 .tlslogin authentication "
++ "successful", cmd->argv[0]);
++ session.auth_mech = "mod_tls.c";
++ return mod_create_data(cmd, (void *) PR_AUTH_RFC2228_OK);
++
++ } else
++ tls_log("TLS/X509 .tlslogin check failed for user '%s'",
++ cmd->argv[0]);
++ }
++
++ return PR_DECLINED(cmd);
++}
++
++/* This function is called only when UserPassword is involved, used to
++ * override the configured password for a user.
++ *
++ * cmd->argv[0]: hashed password (from proftpd.conf)
++ * cmd->argv[1]: user name
++ * cmd->argv[2]: cleartext password
++ */
++MODRET tls_auth_check(cmd_rec *cmd) {
++ if (!tls_engine)
++ return PR_DECLINED(cmd);
++
++ /* Possible authentication combinations:
++ *
++ * TLS handshake + passwd (default)
++ * TLS handshake + .tlslogin (passwd ignored)
++ */
++
++ if ((tls_flags & TLS_SESS_ON_CTRL) &&
++ (tls_opts & TLS_OPT_ALLOW_DOT_LOGIN)) {
++
++ if (tls_dotlogin_allow(cmd->argv[1])) {
++ tls_log("TLS/X509 .tlslogin check successful for user '%s'",
++ cmd->argv[0]);
++ pr_log_auth(PR_LOG_NOTICE, "USER %s: TLS/X509 .tlslogin authentication "
++ "successful", cmd->argv[1]);
++ session.auth_mech = "mod_tls.c";
++ return mod_create_data(cmd, (void *) PR_AUTH_RFC2228_OK);
++
++ } else
++ tls_log("TLS/X509 .tlslogin check failed for user '%s'",
++ cmd->argv[1]);
++ }
++
++ return PR_DECLINED(cmd);
++}
++
++/* Command handlers
++ */
++
++MODRET tls_any(cmd_rec *cmd) {
++ if (!tls_engine)
++ return PR_DECLINED(cmd);
++
++ /* Some commands need not be hindered. */
++ if (strcmp(cmd->argv[0], C_SYST) == 0 ||
++ strcmp(cmd->argv[0], C_AUTH) == 0 ||
++ strcmp(cmd->argv[0], C_FEAT) == 0 ||
++ strcmp(cmd->argv[0], C_QUIT) == 0) {
++ return PR_DECLINED(cmd);
++ }
++
++ if (tls_required_on_auth == 1 &&
++ !(tls_flags & TLS_SESS_ON_CTRL)) {
++
++ if (!(tls_opts & TLS_OPT_ALLOW_PER_USER)) {
++ if (strcmp(cmd->argv[0], C_USER) == 0 ||
++ strcmp(cmd->argv[0], C_PASS) == 0 ||
++ strcmp(cmd->argv[0], C_ACCT) == 0) {
++ tls_log("SSL/TLS required but absent for authentication, "
++ "denying %s command", cmd->argv[0]);
++ pr_response_add_err(R_550,
++ _("SSL/TLS required on the control channel"));
++ return PR_ERROR(cmd);
++ }
++ }
++ }
++
++ if (tls_required_on_ctrl == 1 &&
++ !(tls_flags & TLS_SESS_ON_CTRL)) {
++
++ if (!(tls_opts & TLS_OPT_ALLOW_PER_USER)) {
++ tls_log("SSL/TLS required but absent on control channel, "
++ "denying %s command", cmd->argv[0]);
++ pr_response_add_err(R_550, _("SSL/TLS required on the control channel"));
++ return PR_ERROR(cmd);
++
++ } else {
++
++ if (tls_authenticated &&
++ *tls_authenticated == TRUE) {
++ tls_log("SSL/TLS required but absent on control channel, "
++ "denying %s command", cmd->argv[0]);
++ pr_response_add_err(R_550,
++ _("SSL/TLS required on the control channel"));
++ return PR_ERROR(cmd);
++ }
++ }
++ }
++
++ /* TLSRequired checks */
++
++ if (tls_required_on_data == 1) {
++ /* TLSRequired encompasses all data transfers for this session, the
++ * client did not specify an appropriate PROT, and the command is one
++ * which will trigger a data transfer...
++ */
++
++ if (!(tls_flags & TLS_SESS_NEED_DATA_PROT)) {
++ if (strcmp(cmd->argv[0], C_APPE) == 0 ||
++ strcmp(cmd->argv[0], C_LIST) == 0 ||
++ strcmp(cmd->argv[0], C_MLSD) == 0 ||
++ strcmp(cmd->argv[0], C_NLST) == 0 ||
++ strcmp(cmd->argv[0], C_RETR) == 0 ||
++ strcmp(cmd->argv[0], C_STOR) == 0 ||
++ strcmp(cmd->argv[0], C_STOU) == 0) {
++ tls_log("SSL/TLS required but absent on data channel, "
++ "denying %s command", cmd->argv[0]);
++ pr_response_add_err(R_550, _("SSL/TLS required on the data channel"));
++ return PR_ERROR(cmd);
++ }
++ }
++
++ } else {
++
++ /* TLSRequired is not in effect for all data transfers for this session.
++ * If this command will trigger a data transfer, check the current
++ * context to see if there's a directory-level TLSRequired for data
++ * transfers.
++ *
++ * XXX ideally, rather than using the current directory location, we'd
++ * do the lookup based on the target location.
++ */
++
++ if (strcmp(cmd->argv[0], C_APPE) == 0 ||
++ strcmp(cmd->argv[0], C_LIST) == 0 ||
++ strcmp(cmd->argv[0], C_MLSD) == 0 ||
++ strcmp(cmd->argv[0], C_NLST) == 0 ||
++ strcmp(cmd->argv[0], C_RETR) == 0 ||
++ strcmp(cmd->argv[0], C_STOR) == 0 ||
++ strcmp(cmd->argv[0], C_STOU) == 0) {
++ config_rec *c;
++
++ c = find_config(CURRENT_CONF, CONF_PARAM, "TLSRequired", FALSE);
++ if (c) {
++ int tls_required;
++
++ tls_required = *((int *) c->argv[1]);
++
++ if (tls_required == TRUE &&
++ !(tls_flags & TLS_SESS_NEED_DATA_PROT)) {
++ tls_log("%s command denied by TLSRequired in directory '%s'",
++ cmd->argv[0], session.dir_config ? session.dir_config->name :
++ session.anon_config ? session.anon_config->name :
++ main_server->ServerName);
++ pr_response_add_err(R_550, _("SSL/TLS required on the data channel"));
++ return PR_ERROR(cmd);
++ }
++ }
++ }
++ }
++
++ return PR_DECLINED(cmd);
++}
++
++MODRET tls_auth(cmd_rec *cmd) {
++ register unsigned int i = 0;
++
++ if (!tls_engine)
++ return PR_DECLINED(cmd);
++
++ /* If we already have protection on the control channel (i.e. AUTH has
++ * already been sent by the client and handled), then reject this second
++ * AUTH. Clients that want to renegotiate can either use SSL/TLS's
++ * renegotiation facilities, or disconnect and start over.
++ */
++ if (tls_flags & TLS_SESS_ON_CTRL) {
++ tls_log("Unwilling to accept AUTH after AUTH for this session");
++ pr_response_add_err(R_503, _("Unwilling to accept second AUTH"));
++ return PR_ERROR(cmd);
++ }
++
++ if (cmd->argc < 2) {
++ pr_response_add_err(R_504, _("AUTH requires at least one argument"));
++ return PR_ERROR(cmd);
++ }
++
++ if (tls_flags & TLS_SESS_HAVE_CCC) {
++ tls_log("Unwilling to accept AUTH after CCC for this session");
++ pr_response_add_err(R_534, _("Unwilling to accept security parameters"));
++ return PR_ERROR(cmd);
++ }
++
++ /* Convert the parameter to upper case */
++ for (i = 0; i < strlen(cmd->argv[1]); i++)
++ (cmd->argv[1])[i] = toupper((cmd->argv[1])[i]);
++
++ if (strcmp(cmd->argv[1], "TLS") == 0 ||
++ strcmp(cmd->argv[1], "TLS-C") == 0) {
++ pr_response_send(R_234, _("AUTH %s successful"), cmd->argv[1]);
++
++ tls_log("%s", "TLS/TLS-C requested, starting TLS handshake");
++ if (tls_accept(session.c, FALSE) < 0) {
++ tls_log("%s", "TLS/TLS-C negotiation failed on control channel");
++
++ if (tls_required_on_ctrl == 1) {
++ pr_response_send(R_550, _("TLS handshake failed"));
++ end_login(1);
++ }
++
++ /* If we reach this point, the debug logging may show gibberish
++ * commands from the client. In reality, this gibberish is probably
++ * more encrypted data from the client.
++ */
++ pr_response_add_err(R_550, _("TLS handshake failed"));
++ return PR_ERROR(cmd);
++ }
++
++#if OPENSSL_VERSION_NUMBER < 0x0090702fL
++ /* Make sure blinding is turned on. (For some reason, this only seems
++ * to be allowed on SSL objects, not on SSL_CTX objects. Bummer).
++ */
++ tls_blinding_on(ctrl_ssl);
++#endif
++
++ tls_flags |= TLS_SESS_ON_CTRL;
++
++ } else if (strcmp(cmd->argv[1], "SSL") == 0 ||
++ strcmp(cmd->argv[1], "TLS-P") == 0) {
++ pr_response_send(R_234, _("AUTH %s successful"), cmd->argv[1]);
++
++ tls_log("%s", "SSL/TLS-P requested, starting TLS handshake");
++ if (tls_accept(session.c, FALSE) < 0) {
++ tls_log("%s", "SSL/TLS-P negotiation failed on control channel");
++
++ if (tls_required_on_ctrl == 1) {
++ pr_response_send(R_550, _("TLS handshake failed"));
++ end_login(1);
++ }
++
++ /* If we reach this point, the debug logging may show gibberish
++ * commands from the client. In reality, this gibberish is probably
++ * more encrypted data from the client.
++ */
++ pr_response_add_err(R_550, _("TLS handshake failed"));
++ return PR_ERROR(cmd);
++ }
++
++#if OPENSSL_VERSION_NUMBER < 0x0090702fL
++ /* Make sure blinding is turned on. (For some reason, this only seems
++ * to be allowed on SSL objects, not on SSL_CTX objects. Bummer).
++ */
++ tls_blinding_on(ctrl_ssl);
++#endif
++
++ tls_flags |= TLS_SESS_ON_CTRL;
++ tls_flags |= TLS_SESS_NEED_DATA_PROT;
++
++ } else {
++ tls_log("AUTH %s unsupported, declining", cmd->argv[1]);
++
++ /* Allow other RFC2228 modules a chance a handling this command. */
++ return PR_DECLINED(cmd);
++ }
++
++ pr_session_set_protocol("ftps");
++ session.rfc2228_mech = "TLS";
++
++ return PR_HANDLED(cmd);
++}
++
++MODRET tls_ccc(cmd_rec *cmd) {
++
++ if (!tls_engine ||
++ !session.rfc2228_mech ||
++ strcmp(session.rfc2228_mech, "TLS") != 0)
++ return PR_DECLINED(cmd);
++
++ if (!(tls_flags & TLS_SESS_ON_CTRL)) {
++ pr_response_add_err(R_533,
++ _("CCC not allowed on insecure control connection"));
++ return PR_ERROR(cmd);
++ }
++
++ if (tls_required_on_ctrl == 1) {
++ pr_response_add_err(R_534, _("Unwilling to accept security parameters"));
++ tls_log("%s: unwilling to accept security parameters: "
++ "TLSRequired setting does not allow for unprotected control channel",
++ cmd->argv[0]);
++ return PR_ERROR(cmd);
++ }
++
++ /* Check for <Limit> restrictions. */
++ if (!dir_check(cmd->tmp_pool, cmd, G_NONE, session.cwd, NULL)) {
++ pr_response_add_err(R_534, _("Unwilling to accept security parameters"));
++ tls_log("%s: unwilling to accept security parameters", cmd->argv[0]);
++ return PR_ERROR(cmd);
++ }
++
++ tls_log("received CCC, clearing control channel protection");
++
++ /* Send the OK response asynchronously; the spec dictates that the
++ * response be sent prior to performing the SSL session shutdown.
++ */
++ pr_response_send_async(R_200, _("Clearing control channel protection"));
++
++ /* Close the SSL session, but only one the control channel.
++ * The data channel, if protected, should remain so.
++ */
++
++ tls_end_sess(ctrl_ssl, PR_NETIO_STRM_CTRL, TLS_SHUTDOWN_BIDIRECTIONAL);
++ ctrl_ssl = tls_ctrl_rd_nstrm->strm_data = tls_ctrl_wr_nstrm->strm_data = NULL;
++
++ /* Remove our NetIO for the control channel. */
++ pr_unregister_netio(PR_NETIO_STRM_CTRL);
++
++ tls_flags &= ~TLS_SESS_ON_CTRL;
++ tls_flags |= TLS_SESS_HAVE_CCC;
++
++ return PR_HANDLED(cmd);
++}
++
++MODRET tls_pbsz(cmd_rec *cmd) {
++
++ if (!tls_engine ||
++ !session.rfc2228_mech ||
++ strcmp(session.rfc2228_mech, "TLS") != 0)
++ return PR_DECLINED(cmd);
++
++ CHECK_CMD_ARGS(cmd, 2);
++
++ if (!(tls_flags & TLS_SESS_ON_CTRL)) {
++ pr_response_add_err(R_503,
++ _("PBSZ not allowed on insecure control connection"));
++ return PR_ERROR(cmd);
++ }
++
++ /* We expect "PBSZ 0" */
++ if (strcmp(cmd->argv[1], "0") == 0)
++ pr_response_add(R_200, _("PBSZ 0 successful"));
++ else
++ pr_response_add(R_200, _("PBSZ=0 successful"));
++
++ tls_flags |= TLS_SESS_PBSZ_OK;
++ return PR_HANDLED(cmd);
++}
++
++MODRET tls_post_pass(cmd_rec *cmd) {
++
++ if (!tls_engine)
++ return PR_DECLINED(cmd);
++
++ if (!(tls_opts & TLS_OPT_ALLOW_PER_USER))
++ return PR_DECLINED(cmd);
++
++ tls_authenticated = get_param_ptr(cmd->server->conf, "authenticated", FALSE);
++
++ if (tls_authenticated &&
++ *tls_authenticated == TRUE) {
++ config_rec *c;
++
++ c = find_config(TOPLEVEL_CONF, CONF_PARAM, "TLSRequired", FALSE);
++ if (c) {
++
++ /* Lookup the TLSRequired directive again in this context (which could be
++ * <Anonymous>, for example, or modified by mod_ifsession).
++ */
++
++ tls_required_on_ctrl = *((int *) c->argv[0]);
++ tls_required_on_data = *((int *) c->argv[1]);
++ tls_required_on_auth = *((int *) c->argv[2]);
++
++ /* We cannot return PR_ERROR for the PASS command at this point, since
++ * this is a POST_CMD handler. Instead, we will simply check the
++ * TLSRequired policy, and if the current session does not make the
++ * cut, well, then the session gets cut.
++ */
++ if ((tls_required_on_ctrl == 1 ||
++ tls_required_on_auth == 1) &&
++ (!tls_flags & TLS_SESS_ON_CTRL)) {
++ tls_log("SSL/TLS required but absent on control channel, "
++ "disconnecting");
++ pr_response_send(R_530, "%s", _("Login incorrect."));
++ end_login(0);
++ }
++ }
++ }
++
++ return PR_DECLINED(cmd);
++}
++
++MODRET tls_prot(cmd_rec *cmd) {
++
++ if (!tls_engine ||
++ !session.rfc2228_mech ||
++ strcmp(session.rfc2228_mech, "TLS") != 0)
++ return PR_DECLINED(cmd);
++
++ CHECK_CMD_ARGS(cmd, 2);
++
++ if (!(tls_flags & TLS_SESS_ON_CTRL) &&
++ !(tls_flags & TLS_SESS_HAVE_CCC)) {
++ pr_response_add_err(R_503,
++ _("PROT not allowed on insecure control connection"));
++ return PR_ERROR(cmd);
++ }
++
++ if (!(tls_flags & TLS_SESS_PBSZ_OK)) {
++ pr_response_add_err(R_503,
++ _("You must issue the PBSZ command prior to PROT"));
++ return PR_ERROR(cmd);
++ }
++
++ /* Check for <Limit> restrictions. */
++ if (!dir_check(cmd->tmp_pool, cmd, G_NONE, session.cwd, NULL)) {
++ pr_response_add_err(R_534, _("Unwilling to accept security parameters"));
++ tls_log("%s: denied by <Limit> configuration", cmd->argv[0]);
++ return PR_ERROR(cmd);
++ }
++
++ /* Only PROT C or PROT P is valid with respect to SSL/TLS. */
++ if (strcmp(cmd->argv[1], "C") == 0) {
++ char *mesg = "Protection set to Clear";
++
++ if (tls_required_on_data != 1) {
++ /* Only accept this if SSL/TLS is not required, by policy, on data
++ * connections.
++ */
++ tls_flags &= ~TLS_SESS_NEED_DATA_PROT;
++ pr_response_add(R_200, "%s", mesg);
++ tls_log("%s", mesg);
++
++ } else {
++ pr_response_add_err(R_534, _("Unwilling to accept security parameters"));
++ tls_log("%s: TLSRequired requires protection for data transfers",
++ cmd->argv[0]);
++ tls_log("%s: unwilling to accept security parameter (%s)", cmd->argv[0],
++ cmd->argv[1]);
++ return PR_ERROR(cmd);
++ }
++
++ } else if (strcmp(cmd->argv[1], "P") == 0) {
++ char *mesg = "Protection set to Private";
++
++ if (tls_required_on_data != -1) {
++ /* Only accept this if SSL/TLS is allowed, by policy, on data
++ * connections.
++ */
++ tls_flags |= TLS_SESS_NEED_DATA_PROT;
++ pr_response_add(R_200, "%s", mesg);
++ tls_log("%s", mesg);
++
++ } else {
++ pr_response_add_err(R_534, _("Unwilling to accept security parameters"));
++ tls_log("%s: TLSRequired does not allow protection for data transfers",
++ cmd->argv[0]);
++ tls_log("%s: unwilling to accept security parameter (%s)", cmd->argv[0],
++ cmd->argv[1]);
++ return PR_ERROR(cmd);
++ }
++
++ } else if (strcmp(cmd->argv[1], "S") == 0 ||
++ strcmp(cmd->argv[1], "E") == 0) {
++ pr_response_add_err(R_536, _("PROT %s unsupported"), cmd->argv[1]);
++
++ /* By the time the logic reaches this point, there must have been
++ * an SSL/TLS session negotiated; other AUTH mechanisms will handle
++ * things differently, and when they do, the logic of this handler
++ * would not reach this point. This means that it would not be impolite
++ * to return ERROR here, rather than DECLINED: it shows that mod_tls
++ * is handling the security mechanism, and that this module does not
++ * allow for the unsupported PROT levels.
++ */
++ return PR_ERROR(cmd);
++
++ } else {
++ pr_response_add_err(R_504, _("PROT %s unsupported"), cmd->argv[1]);
++ return PR_ERROR(cmd);
++ }
++
++ return PR_HANDLED(cmd);
++}
++
++/* Configuration handlers
++ */
++
++/* usage: TLSCACertificateFile file */
++MODRET set_tlscacertfile(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1]))
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSCACertificatePath path */
++MODRET set_tlscacertpath(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!dir_exists(cmd->argv[1]))
++ CONF_ERROR(cmd, "parameter must be a directory path");
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSCARevocationFile file */
++MODRET set_tlscacrlfile(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1]))
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSCARevocationPath path */
++MODRET set_tlscacrlpath(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!dir_exists(cmd->argv[1]))
++ CONF_ERROR(cmd, "parameter must be a directory path");
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSCertificateChainFile file */
++MODRET set_tlscertchain(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1]))
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSCipherSuite string */
++MODRET set_tlsciphersuite(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSControlsACLs actions|all allow|deny user|group list */
++MODRET set_tlsctrlsacls(cmd_rec *cmd) {
++#ifdef PR_USE_CTRLS
++ char *bad_action = NULL, **actions = NULL;
++
++ CHECK_ARGS(cmd, 4);
++ CHECK_CONF(cmd, CONF_ROOT);
++
++ /* We can cheat here, and use the ctrls_parse_acl() routine to
++ * separate the given string...
++ */
++ actions = ctrls_parse_acl(cmd->tmp_pool, cmd->argv[1]);
++
++ /* Check the second parameter to make sure it is "allow" or "deny" */
++ if (strcmp(cmd->argv[2], "allow") != 0 &&
++ strcmp(cmd->argv[2], "deny") != 0)
++ CONF_ERROR(cmd, "second parameter must be 'allow' or 'deny'");
++
++ /* Check the third parameter to make sure it is "user" or "group" */
++ if (strcmp(cmd->argv[3], "user") != 0 &&
++ strcmp(cmd->argv[3], "group") != 0)
++ CONF_ERROR(cmd, "third parameter must be 'user' or 'group'");
++
++ bad_action = pr_ctrls_set_module_acls(tls_acttab, tls_act_pool, actions,
++ cmd->argv[2], cmd->argv[3], cmd->argv[4]);
++ if (bad_action != NULL)
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, ": unknown action: '",
++ bad_action, "'", NULL));
++
++ return PR_HANDLED(cmd);
++#else
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "The ", cmd->argv[0],
++ " directive requires Controls support (--enable-ctrls)", NULL));
++#endif /* PR_USE_CTRLS */
++}
++
++/* usage: TLSCryptoDevice driver|"ALL" */
++MODRET set_tlscryptodevice(cmd_rec *cmd) {
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ (void) add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++
++ return PR_HANDLED(cmd);
++
++#else /* OpenSSL is too old for ENGINE support */
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "The ", cmd->argv[0],
++ "directive cannot be used on the system, as the OpenSSL version is too old",
++ NULL));
++#endif
++}
++
++/* usage: TLSDHParamFile file */
++MODRET set_tlsdhparamfile(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1]))
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSDSACertificateFile file */
++MODRET set_tlsdsacertfile(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1])) {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++ }
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSDSACertificateKeyFile file */
++MODRET set_tlsdsakeyfile(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1])) {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++ }
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSEngine on|off */
++MODRET set_tlsengine(cmd_rec *cmd) {
++ int bool = -1;
++ config_rec *c = NULL;
++
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ bool = get_boolean(cmd, 1);
++ if (bool == -1)
++ CONF_ERROR(cmd, "expected Boolean parameter");
++
++ c = add_config_param(cmd->argv[0], 1, NULL);
++ c->argv[0] = pcalloc(c->pool, sizeof(unsigned char));
++ *((unsigned char *) c->argv[0]) = bool;
++
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSLog file */
++MODRET set_tlslog(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSOptions opt1 opt2 ... */
++MODRET set_tlsoptions(cmd_rec *cmd) {
++ config_rec *c = NULL;
++ register unsigned int i = 0;
++ unsigned long opts = 0UL;
++
++ if (cmd->argc-1 == 0)
++ CONF_ERROR(cmd, "wrong number of parameters");
++
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ c = add_config_param(cmd->argv[0], 1, NULL);
++
++ for (i = 1; i < cmd->argc; i++) {
++ if (strcmp(cmd->argv[i], "AllowDotLogin") == 0) {
++ opts |= TLS_OPT_ALLOW_DOT_LOGIN;
++
++ } else if (strcmp(cmd->argv[i], "AllowPerUser") == 0) {
++ opts |= TLS_OPT_ALLOW_PER_USER;
++
++ } else if (strcmp(cmd->argv[i], "AllowClientRenegotiation") == 0 ||
++ strcmp(cmd->argv[i], "AllowClientRenegotiations") == 0) {
++ opts |= TLS_OPT_ALLOW_CLIENT_RENEGOTIATIONS;
++
++ } else if (strcmp(cmd->argv[i], "EnableDiags") == 0) {
++ opts |= TLS_OPT_ENABLE_DIAGS;
++
++ } else if (strcmp(cmd->argv[i], "ExportCertData") == 0) {
++ opts |= TLS_OPT_EXPORT_CERT_DATA;
++
++ } else if (strcmp(cmd->argv[i], "NoCertRequest") == 0) {
++ opts |= TLS_OPT_NO_CERT_REQUEST;
++
++ } else if (strcmp(cmd->argv[i], "NoSessionReuseRequired") == 0) {
++ opts |= TLS_OPT_NO_SESSION_REUSE_REQUIRED;
++
++ } else if (strcmp(cmd->argv[i], "StdEnvVars") == 0) {
++ opts |= TLS_OPT_STD_ENV_VARS;
++
++ } else if (strcmp(cmd->argv[i], "dNSNameRequired") == 0) {
++ opts |= TLS_OPT_VERIFY_CERT_FQDN;
++
++ } else if (strcmp(cmd->argv[i], "iPAddressRequired") == 0) {
++ opts |= TLS_OPT_VERIFY_CERT_IP_ADDR;
++
++ } else if (strcmp(cmd->argv[i], "UseImplicitSSL") == 0) {
++ opts |= TLS_OPT_USE_IMPLICIT_SSL;
++
++ } else {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, ": unknown TLSOption '",
++ cmd->argv[i], "'", NULL));
++ }
++ }
++
++ c->argv[0] = pcalloc(c->pool, sizeof(unsigned long));
++ *((unsigned long *) c->argv[0]) = opts;
++
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSPassPhraseProvider path */
++MODRET set_tlspassphraseprovider(cmd_rec *cmd) {
++ struct stat st;
++
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT);
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "must be a full path: '",
++ cmd->argv[1], "'", NULL));
++
++ if (stat(cmd->argv[1], &st) < 0)
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "error checking '",
++ cmd->argv[1], "': ", strerror(errno), NULL));
++
++ if (!S_ISREG(st.st_mode))
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "unable to use '",
++ cmd->argv[1], ": Not a regular file", NULL));
++
++ tls_passphrase_provider = pstrdup(permanent_pool, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSPKCS12File file */
++MODRET set_tlspkcs12file(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1])) {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++ }
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSProtocol version1 ... versionN */
++MODRET set_tlsprotocol(cmd_rec *cmd) {
++ register unsigned int i;
++
++ if (cmd->argc-1 == 0)
++ CONF_ERROR(cmd, "wrong number of parameters");
++
++ CHECK_CONF(cmd, CONF_ROOT);
++
++ tls_protocol = 0;
++
++ for (i = 1; i < cmd->argc; i++) {
++ if (strcasecmp(cmd->argv[i], "SSLv23") == 0) {
++ tls_protocol |= TLS_PROTO_SSL_V3;
++ tls_protocol |= TLS_PROTO_TLS_V1;
++
++ } else if (strcasecmp(cmd->argv[i], "SSLv3") == 0) {
++ tls_protocol |= TLS_PROTO_SSL_V3;
++
++ } else if (strcasecmp(cmd->argv[i], "TLSv1") == 0) {
++ tls_protocol |= TLS_PROTO_TLS_V1;
++
++ } else {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "unknown protocol: '",
++ cmd->argv[i], "'", NULL));
++ }
++ }
++
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSRandomSeed file */
++MODRET set_tlsrandseed(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSRenegotiate [ctrl nsecs] [data nbytes] */
++MODRET set_tlsrenegotiate(cmd_rec *cmd) {
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ register unsigned int i = 0;
++ config_rec *c = NULL;
++
++ if (cmd->argc-1 < 1 || cmd->argc-1 > 8)
++ CONF_ERROR(cmd, "wrong number of parameters");
++
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (strcasecmp(cmd->argv[1], "none") == 0) {
++ add_config_param(cmd->argv[0], 0);
++ return PR_HANDLED(cmd);
++ }
++
++ c = add_config_param(cmd->argv[0], 4, NULL, NULL, NULL, NULL);
++ c->argv[0] = pcalloc(c->pool, sizeof(int));
++ *((int *) c->argv[0]) = 0;
++ c->argv[1] = pcalloc(c->pool, sizeof(off_t));
++ *((off_t *) c->argv[1]) = 0;
++ c->argv[2] = pcalloc(c->pool, sizeof(int));
++ *((int *) c->argv[2]) = 0;
++ c->argv[3] = pcalloc(c->pool, sizeof(unsigned char));
++ *((unsigned char *) c->argv[3]) = TRUE;
++
++ for (i = 1; i < cmd->argc;) {
++ if (strcmp(cmd->argv[i], "ctrl") == 0) {
++ int secs = atoi(cmd->argv[i+1]);
++
++ if (secs > 0) {
++ *((int *) c->argv[0]) = secs;
++
++ } else {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, cmd->argv[i],
++ " must be greater than zero: '", cmd->argv[i+1], "'", NULL));
++ }
++
++ i += 2;
++
++ } else if (strcmp(cmd->argv[i], "data") == 0) {
++ char *tmp = NULL;
++ unsigned long kbytes = strtoul(cmd->argv[i+1], &tmp, 10);
++
++ if (!(tmp && *tmp)) {
++ *((off_t *) c->argv[1]) = (off_t) kbytes * 1024;
++
++ } else {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, cmd->argv[i],
++ " must be greater than zero: '", cmd->argv[i+1], "'", NULL));
++ }
++
++ i += 2;
++
++ } else if (strcmp(cmd->argv[i], "required") == 0) {
++ int bool = get_boolean(cmd, i+1);
++
++ if (bool != -1) {
++ *((unsigned char *) c->argv[3]) = bool;
++
++ } else {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, cmd->argv[i],
++ " must be a Boolean value: '", cmd->argv[i+1], "'", NULL));
++ }
++
++ i += 2;
++
++ } else if (strcmp(cmd->argv[i], "timeout") == 0) {
++ int secs = atoi(cmd->argv[i+1]);
++
++ if (secs > 0) {
++ *((int *) c->argv[2]) = secs;
++
++ } else {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, cmd->argv[i],
++ " must be greater than zero: '", cmd->argv[i+1], "'", NULL));
++ }
++
++ i += 2;
++
++ } else {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
++ ": unknown TLSRenegotiate argument '", cmd->argv[i], "'", NULL));
++ }
++ }
++
++ return PR_HANDLED(cmd);
++#else
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, " requires OpenSSL-0.9.7 or greater",
++ NULL));
++#endif
++}
++
++/* usage: TLSRequired on|off|both|control|ctrl|[!]data|auth|auth+data */
++MODRET set_tlsrequired(cmd_rec *cmd) {
++ int bool = -1;
++ int on_auth = 0, on_ctrl = 0, on_data = 0;
++ config_rec *c = NULL;
++
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL|CONF_ANON|CONF_DIR|
++ CONF_DYNDIR);
++
++ bool = get_boolean(cmd, 1);
++ if (bool == -1) {
++ if (strcmp(cmd->argv[1], "control") == 0 ||
++ strcmp(cmd->argv[1], "ctrl") == 0) {
++ on_auth = 1;
++ on_ctrl = 1;
++
++ } else if (strcmp(cmd->argv[1], "data") == 0) {
++ on_data = 1;
++
++ } else if (strcmp(cmd->argv[1], "!data") == 0) {
++ on_data = -1;
++
++ } else if (strcmp(cmd->argv[1], "both") == 0 ||
++ strcmp(cmd->argv[1], "ctrl+data") == 0) {
++ on_auth = 1;
++ on_ctrl = 1;
++ on_data = 1;
++
++ } else if (strcmp(cmd->argv[1], "ctrl+!data") == 0) {
++ on_auth = 1;
++ on_ctrl = 1;
++ on_data = -1;
++
++ } else if (strcmp(cmd->argv[1], "auth") == 0) {
++ on_auth = 1;
++
++ } else if (strcmp(cmd->argv[1], "auth+data") == 0) {
++ on_auth = 1;
++ on_data = 1;
++
++ } else if (strcmp(cmd->argv[1], "auth+!data") == 0) {
++ on_auth = 1;
++ on_data = -1;
++
++ } else
++ CONF_ERROR(cmd, "bad parameter");
++
++ } else {
++ if (bool == TRUE) {
++ on_auth = 1;
++ on_ctrl = 1;
++ on_data = 1;
++ }
++ }
++
++ c = add_config_param(cmd->argv[0], 3, NULL, NULL, NULL);
++ c->argv[0] = pcalloc(c->pool, sizeof(int));
++ *((int *) c->argv[0]) = on_ctrl;
++ c->argv[1] = pcalloc(c->pool, sizeof(int));
++ *((int *) c->argv[1]) = on_data;
++ c->argv[2] = pcalloc(c->pool, sizeof(int));
++ *((int *) c->argv[2]) = on_auth;
++
++ c->flags |= CF_MERGEDOWN;
++
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSRSACertificateFile file */
++MODRET set_tlsrsacertfile(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1])) {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++ }
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSRSACertificateKeyFile file */
++MODRET set_tlsrsakeyfile(cmd_rec *cmd) {
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ if (!file_exists(cmd->argv[1])) {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[1],
++ "' does not exist", NULL));
++ }
++
++ if (*cmd->argv[1] != '/')
++ CONF_ERROR(cmd, "parameter must be an absolute path");
++
++ add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSSessionCache type:/info [timeout] */
++MODRET set_tlssessioncache(cmd_rec *cmd) {
++ char *info, *ptr;
++ config_rec *c;
++ long timeout = -1;
++
++ if (cmd->argc < 2 ||
++ cmd->argc > 3) {
++ CONF_ERROR(cmd, "wrong number of parameters");
++ }
++
++ CHECK_CONF(cmd, CONF_ROOT);
++
++ /* Separate the type/info parameter into pieces. */
++ ptr = strchr(cmd->argv[1], ':');
++ if (ptr == NULL) {
++ CONF_ERROR(cmd, "badly formatted parameter");
++ }
++
++ *ptr = '\0';
++
++ /* Verify that the requested cache type has been registered. */
++ if (tls_sess_cache_get_cache(cmd->argv[1]) == NULL) {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "session cache type '",
++ cmd->argv[1], "' not available", NULL));
++ }
++
++ info = ptr + 1;
++
++ if (cmd->argc == 3) {
++ ptr = NULL;
++
++ timeout = strtol(cmd->argv[2], &ptr, 10);
++ if (ptr && *ptr) {
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", cmd->argv[2],
++ "' is not a valid timeout value", NULL));
++ }
++
++ if (timeout < 1) {
++ CONF_ERROR(cmd, "timeout be greater than 1");
++ }
++
++ } else {
++ /* Default timeout is 30 min (1800 secs). */
++ timeout = 1800;
++ }
++
++ c = add_config_param(cmd->argv[0], 3, NULL, NULL, NULL);
++ c->argv[0] = pstrdup(c->pool, cmd->argv[1]);
++ c->argv[1] = pstrdup(c->pool, info);
++ c->argv[2] = palloc(c->pool, sizeof(long));
++ *((long *) c->argv[2]) = timeout;
++
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSTimeoutHandshake <secs> */
++MODRET set_tlstimeouthandshake(cmd_rec *cmd) {
++ int timeout = -1;
++ config_rec *c = NULL;
++ char *tmp = NULL;
++
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ timeout = (int) strtol(cmd->argv[1], &tmp, 10);
++
++ if ((tmp && *tmp) || timeout < 0 || timeout > 65535)
++ CONF_ERROR(cmd, "timeout value must be between 0 and 65535");
++
++ c = add_config_param(cmd->argv[0], 1, NULL);
++ c->argv[0] = pcalloc(c->pool, sizeof(unsigned int));
++ *((unsigned int *) c->argv[0]) = timeout;
++
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSVerifyClient on|off */
++MODRET set_tlsverifyclient(cmd_rec *cmd) {
++ int bool = -1;
++ config_rec *c = NULL;
++
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ bool = get_boolean(cmd, 1);
++ if (bool == -1)
++ CONF_ERROR(cmd, "expected Boolean parameter");
++
++ c = add_config_param(cmd->argv[0], 1, NULL);
++ c->argv[0] = pcalloc(c->pool, sizeof(unsigned char));
++ *((unsigned char *) c->argv[0]) = bool;
++
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSVerifyDepth depth */
++MODRET set_tlsverifydepth(cmd_rec *cmd) {
++ int depth = -1;
++ config_rec *c = NULL;
++
++ CHECK_ARGS(cmd, 1);
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ depth = atoi(cmd->argv[1]);
++ if (depth < 0)
++ CONF_ERROR(cmd, "depth must be zero or greater");
++
++ c = add_config_param(cmd->argv[0], 1, NULL);
++ c->argv[0] = pcalloc(c->pool, sizeof(int));
++ *((int *) c->argv[0]) = depth;
++
++ return PR_HANDLED(cmd);
++}
++
++/* usage: TLSVerifyOrder mech1 ... */
++MODRET set_tlsverifyorder(cmd_rec *cmd) {
++ register unsigned int i = 0;
++ config_rec *c = NULL;
++
++ /* We only support two client cert verification mechanisms at the moment:
++ * CRLs and OCSP.
++ */
++ if (cmd->argc-1 < 1 ||
++ cmd->argc-1 > 2) {
++ CONF_ERROR(cmd, "wrong number of parameters");
++ }
++
++ CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
++
++ for (i = 1; i < cmd->argc; i++) {
++ char *mech = cmd->argv[i];
++
++ if (strcasecmp(mech, "crl") != 0
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ && strcasecmp(mech, "ocsp") != 0) {
++#else
++ ) {
++#endif
++ CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
++ "unsupported verification mechanism '", mech, "' requested", NULL));
++ }
++ }
++
++ c = add_config_param(cmd->argv[0], cmd->argc-1, NULL, NULL);
++ for (i = 1; i < cmd->argc; i++) {
++ char *mech = cmd->argv[i];
++
++ if (strcasecmp(mech, "crl") == 0)
++ c->argv[i-1] = pstrdup(c->pool, "crl");
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ if (strcasecmp(mech, "ocsp") == 0)
++ c->argv[i-1] = pstrdup(c->pool, "ocsp");
++#endif
++ }
++
++ return PR_HANDLED(cmd);
++}
++
++/* Event handlers
++ */
++
++#if defined(PR_SHARED_MODULE)
++static void tls_mod_unload_ev(const void *event_data, void *user_data) {
++ if (strcmp("mod_tls.c", (const char *) event_data) == 0) {
++ /* Unregister ourselves from all events. */
++ pr_event_unregister(&tls_module, NULL, NULL);
++
++# ifdef PR_USE_CTRLS
++ /* Unregister any control actions. */
++ pr_ctrls_unregister(&tls_module, "tls");
++
++ destroy_pool(tls_act_pool);
++ tls_act_pool = NULL;
++# endif /* PR_USE_CTRLS */
++
++ /* Cleanup the OpenSSL stuff. */
++ tls_cleanup(0);
++
++ /* Unregister our NetIO handler for the control channel. */
++ pr_unregister_netio(PR_NETIO_STRM_CTRL);
++
++ if (tls_ctrl_netio) {
++ destroy_pool(tls_ctrl_netio->pool);
++ tls_ctrl_netio = NULL;
++ }
++
++ if (tls_data_netio) {
++ destroy_pool(tls_data_netio->pool);
++ tls_data_netio = NULL;
++ }
++
++ close(tls_logfd);
++ tls_logfd = -1;
++ }
++}
++#endif /* PR_SHARED_MODULE */
++
++/* Daemon PID */
++extern pid_t mpid;
++
++static void tls_shutdown_ev(const void *event_data, void *user_data) {
++ if (mpid == getpid()) {
++ tls_scrub_pkeys();
++ }
++
++ /* Write out a new RandomSeed file, for use later. */
++ if (tls_rand_file) {
++ int res;
++
++ res = RAND_write_file(tls_rand_file);
++ if (res < 0) {
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION
++ ": error writing PRNG seed data to '%s': %s", tls_rand_file,
++ tls_get_errors());
++
++ } else {
++ pr_log_debug(DEBUG2, MOD_TLS_VERSION
++ ": wrote %d bytes of PRNG seed data to '%s'", res, tls_rand_file);
++ }
++ }
++
++ RAND_cleanup();
++}
++
++static void tls_restart_ev(const void *event_data, void *user_data) {
++#ifdef PR_USE_CTRLS
++ register unsigned int i;
++#endif /* PR_USE_CTRLS */
++
++ tls_scrub_pkeys();
++
++#ifdef PR_USE_CTRLS
++ if (tls_act_pool) {
++ destroy_pool(tls_act_pool);
++ tls_act_pool = NULL;
++ }
++
++ tls_act_pool = make_sub_pool(permanent_pool);
++ pr_pool_tag(tls_act_pool, "TLS Controls Pool");
++
++ /* Re-create the controls ACLs. */
++ for (i = 0; tls_acttab[i].act_action; i++) {
++ tls_acttab[i].act_acl = palloc(tls_act_pool, sizeof(ctrls_acl_t));
++ pr_ctrls_init_acl(tls_acttab[i].act_acl);
++ }
++#endif /* PR_USE_CTRLS */
++
++ tls_closelog();
++}
++
++static void tls_exit_ev(const void *event_data, void *user_data) {
++
++ /* If diags are enabled, log some OpenSSL stats. */
++ if (ssl_ctx != NULL &&
++ (tls_opts & TLS_OPT_ENABLE_DIAGS)) {
++ long res;
++
++ res = SSL_CTX_sess_accept(ssl_ctx);
++ tls_log("[stat]: SSL sessions attempted: %ld", res);
++
++ res = SSL_CTX_sess_accept_good(ssl_ctx);
++ tls_log("[stat]: SSL sessions established: %ld", res);
++
++ res = SSL_CTX_sess_accept_renegotiate(ssl_ctx);
++ tls_log("[stat]: SSL sessions renegotiated: %ld", res);
++
++ res = SSL_CTX_sess_hits(ssl_ctx);
++ tls_log("[stat]: SSL sessions resumed: %ld", res);
++
++ res = SSL_CTX_sess_number(ssl_ctx);
++ tls_log("[stat]: SSL sessions in cache: %ld", res);
++
++ res = SSL_CTX_sess_cb_hits(ssl_ctx);
++ tls_log("[stat]: SSL session cache hits: %ld", res);
++
++ res = SSL_CTX_sess_misses(ssl_ctx);
++ tls_log("[stat]: SSL session cache misses: %ld", res);
++
++ res = SSL_CTX_sess_timeouts(ssl_ctx);
++ tls_log("[stat]: SSL session cache timeouts: %ld", res);
++
++ res = SSL_CTX_sess_cache_full(ssl_ctx);
++ tls_log("[stat]: SSL session cache size exceeded: %ld", res);
++ }
++
++ /* OpenSSL cleanup */
++ tls_cleanup(0);
++
++ /* Done with the NetIO objects. Note that we only really need to
++ * destroy the data channel NetIO object; the control channel NetIO
++ * object is allocated out of the permanent pool, in the daemon process,
++ * and thus we have a read-only copy.
++ */
++
++ if (tls_ctrl_netio) {
++ pr_unregister_netio(PR_NETIO_STRM_CTRL);
++ destroy_pool(tls_ctrl_netio->pool);
++ tls_ctrl_netio = NULL;
++ }
++
++ if (tls_data_netio) {
++ pr_unregister_netio(PR_NETIO_STRM_DATA);
++ destroy_pool(tls_data_netio->pool);
++ tls_data_netio = NULL;
++ }
++
++ if (mpid != getpid())
++ tls_scrub_pkeys();
++
++ tls_closelog();
++ return;
++}
++
++static void tls_timeout_ev(const void *event_data, void *user_data) {
++
++ if (session.c &&
++ ctrl_ssl != NULL &&
++ (tls_flags & TLS_SESS_ON_CTRL)) {
++ /* Try to properly close the SSL session down on the control channel,
++ * if there is one.
++ */
++ tls_end_sess(ctrl_ssl, PR_NETIO_STRM_CTRL, 0);
++ tls_ctrl_rd_nstrm->strm_data = tls_ctrl_wr_nstrm->strm_data =
++ ctrl_ssl = NULL;
++ }
++
++}
++
++static void tls_get_passphrases(void) {
++ server_rec *s = NULL;
++ char buf[256];
++
++ for (s = (server_rec *) server_list->xas_list; s; s = s->next) {
++ config_rec *rsa = NULL, *dsa = NULL, *pkcs12 = NULL;
++ tls_pkey_t *k = NULL;
++
++ /* Find any TLS*CertificateKeyFile directives. If they aren't present,
++ * look for TLS*CertificateFile directives (when appropriate).
++ */
++ rsa = find_config(s->conf, CONF_PARAM, "TLSRSACertificateKeyFile", FALSE);
++ if (rsa == NULL)
++ rsa = find_config(s->conf, CONF_PARAM, "TLSRSACertificateFile", FALSE);
++
++ dsa = find_config(s->conf, CONF_PARAM, "TLSDSACertificateKeyFile", FALSE);
++ if (dsa == NULL)
++ dsa = find_config(s->conf, CONF_PARAM, "TLSDSACertificateFile", FALSE);
++
++ pkcs12 = find_config(s->conf, CONF_PARAM, "TLSPKCS12File", FALSE);
++
++ if (rsa == NULL &&
++ dsa == NULL &&
++ pkcs12 == NULL) {
++ continue;
++ }
++
++ k = pcalloc(s->pool, sizeof(tls_pkey_t));
++ k->pkeysz = PEM_BUFSIZE;
++ k->server = s;
++
++ if (rsa) {
++ snprintf(buf, sizeof(buf)-1, "RSA key for the %s#%d (%s) server: ",
++ pr_netaddr_get_ipstr(s->addr), s->ServerPort, s->ServerName);
++ buf[sizeof(buf)-1] = '\0';
++
++ k->rsa_pkey = tls_get_page(PEM_BUFSIZE, &k->rsa_pkey_ptr);
++ if (k->rsa_pkey == NULL) {
++ pr_log_pri(PR_LOG_ERR, "out of memory!");
++ exit(1);
++ }
++
++ if (tls_get_passphrase(s, rsa->argv[0], buf, k->rsa_pkey,
++ k->pkeysz, TLS_PASSPHRASE_FL_RSA_KEY) < 0) {
++ pr_log_debug(DEBUG0, MOD_TLS_VERSION
++ ": error reading RSA passphrase: %s", tls_get_errors());
++
++ pr_log_pri(PR_LOG_ERR, MOD_TLS_VERSION ": unable to use "
++ "RSA certificate key in '%s', exiting", (char *) rsa->argv[0]);
++ end_login(1);
++ }
++ }
++
++ if (dsa) {
++ snprintf(buf, sizeof(buf)-1, "DSA key for the %s#%d (%s) server: ",
++ pr_netaddr_get_ipstr(s->addr), s->ServerPort, s->ServerName);
++ buf[sizeof(buf)-1] = '\0';
++
++ k->dsa_pkey = tls_get_page(PEM_BUFSIZE, &k->dsa_pkey_ptr);
++ if (k->dsa_pkey == NULL) {
++ pr_log_pri(PR_LOG_ERR, "out of memory!");
++ exit(1);
++ }
++
++ if (tls_get_passphrase(s, dsa->argv[0], buf, k->dsa_pkey,
++ k->pkeysz, TLS_PASSPHRASE_FL_DSA_KEY) < 0) {
++ pr_log_debug(DEBUG0, MOD_TLS_VERSION
++ ": error reading DSA passphrase: %s", tls_get_errors());
++
++ pr_log_pri(PR_LOG_ERR, MOD_TLS_VERSION ": unable to use "
++ "DSA certificate key '%s', exiting", (char *) dsa->argv[0]);
++ end_login(1);
++ }
++ }
++
++ if (pkcs12) {
++ snprintf(buf, sizeof(buf)-1,
++ "PKCS12 password for the %s#%d (%s) server: ",
++ pr_netaddr_get_ipstr(s->addr), s->ServerPort, s->ServerName);
++ buf[sizeof(buf)-1] = '\0';
++
++ k->pkcs12_passwd = tls_get_page(PEM_BUFSIZE, &k->pkcs12_passwd_ptr);
++ if (k->pkcs12_passwd == NULL) {
++ pr_log_pri(PR_LOG_ERR, "out of memory!");
++ exit(1);
++ }
++
++ if (tls_get_passphrase(s, pkcs12->argv[0], buf, k->pkcs12_passwd,
++ k->pkeysz, TLS_PASSPHRASE_FL_PKCS12_PASSWD) < 0) {
++ pr_log_debug(DEBUG0, MOD_TLS_VERSION
++ ": error reading PKCS12 password: %s", tls_get_errors());
++
++ pr_log_pri(PR_LOG_ERR, MOD_TLS_VERSION ": unable to use "
++ "PKCS12 certificate '%s', exiting", (char *) pkcs12->argv[0]);
++ end_login(1);
++ }
++ }
++
++ k->next = tls_pkey_list;
++ tls_pkey_list = k;
++ tls_npkeys++;
++ }
++}
++
++static void tls_postparse_ev(const void *event_data, void *user_data) {
++ server_rec *s = NULL;
++
++ /* Check for incompatible configurations. For example, configuring:
++ *
++ * TLSOptions AllowPerUser
++ * TLSRequired auth
++ *
++ * cannot be supported; the AllowPerUser means that the requirement of
++ * SSL/TLS protection during authentication cannot be enforced.
++ */
++
++ for (s = (server_rec *) server_list->xas_list; s; s = s->next) {
++ unsigned long *opts;
++ config_rec *toplevel_c = NULL, *other_c = NULL;
++ int toplevel_auth_requires_ssl = FALSE, other_auth_requires_ssl = TRUE;
++
++ opts = get_param_ptr(s->conf, "TLSOptions", FALSE);
++ if (opts == NULL) {
++ continue;
++ }
++
++ /* The purpose of this check is to watch for configurations such as:
++ *
++ * <IfModule mod_tls.c>
++ * ...
++ * TLSRequired on
++ * ...
++ * TLSOptions AllowPerUser
++ * ...
++ * </IfModule>
++ *
++ * This policy cannot be enforced; we cannot require use of SSL/TLS
++ * (specifically at authentication time, when we do NOT know the user)
++ * AND also allow per-user SSL/TLS requirements. It's a chicken-and-egg
++ * problem.
++ *
++ * However, we DO want to allow configurations like:
++ *
++ * <IfModule mod_tls.c>
++ * ...
++ * TLSRequired on
++ * ...
++ * TLSOptions AllowPerUser
++ * ...
++ * </IfModule>
++ *
++ * <Anonymous ...>
++ * ...
++ * <IfModule mod_tls.c>
++ * TLSRequired off
++ * </IfModule>
++ * </Anonymous>
++ *
++ * Thus this check is a bit tricky. We look first in this server_rec's
++ * config list for a top-level TLSRequired setting. If it is 'on' AND
++ * if the AllowPerUser TLSOption is set, AND we find no other TLSRequired
++ * configs deeper in the server_rec whose value is 'off', then log the
++ * error and quit. Otherwise, let things proceed.
++ *
++ * If the mod_ifsession module is present, skip this check as well; we
++ * will not be able to suss out any TLSRequired settings which are
++ * lurking in mod_ifsession's grasp until authentication time.
++ *
++ * I still regret adding support for the AllowPerUser TLSOption. Users
++ * just cannot seem to wrap their minds around the fact that the user
++ * is not known at the time when the SSL/TLS session is done. Sigh.
++ */
++
++ if (pr_module_exists("mod_ifsession.c")) {
++ continue;
++ }
++
++ toplevel_c = find_config(s->conf, CONF_PARAM, "TLSRequired", FALSE);
++ if (toplevel_c) {
++ toplevel_auth_requires_ssl = *((int *) toplevel_c->argv[2]);
++ }
++
++ /* If this toplevel TLSRequired value is 'off', then we need check no
++ * further.
++ */
++ if (!toplevel_auth_requires_ssl) {
++ continue;
++ }
++
++ /* This time, we recurse deeper into the server_rec's configs.
++ * We need only pay attention to settings we find in the CONF_DIR or
++ * CONF_ANON config contexts. And we need only look until we find such
++ * a setting does not require SSL/TLS during authentication, for at that
++ * point we know it is not a misconfiguration.
++ */
++ find_config_set_top(NULL);
++ other_c = find_config(s->conf, CONF_PARAM, "TLSRequired", TRUE);
++ while (other_c) {
++ int auth_requires_ssl;
++
++ pr_signals_handle();
++
++ if (other_c->parent == NULL ||
++ (other_c->parent->config_type != CONF_ANON &&
++ other_c->parent->config_type != CONF_DIR)) {
++ /* Not what we're looking for; continue on. */
++ other_c = find_config_next(other_c, other_c->next, CONF_PARAM,
++ "TLSRequired", TRUE);
++ continue;
++ }
++
++ auth_requires_ssl = *((int *) other_c->argv[2]);
++ if (!auth_requires_ssl) {
++ other_auth_requires_ssl = FALSE;
++ break;
++ }
++
++ other_c = find_config_next(other_c, other_c->next, CONF_PARAM,
++ "TLSRequired", TRUE);
++ }
++
++ if ((*opts & TLS_OPT_ALLOW_PER_USER) &&
++ toplevel_auth_requires_ssl == TRUE &&
++ other_auth_requires_ssl == TRUE) {
++ pr_log_pri(PR_LOG_ERR, MOD_TLS_VERSION ": Server %s: cannot enforce "
++ "both 'TLSRequired auth' and 'TLSOptions AllowPerUser' at the "
++ "same time", s->ServerName);
++ end_login(1);
++ }
++ }
++
++ /* Initialize the OpenSSL context. */
++ if (tls_init_ctx() < 0) {
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION
++ ": error initialising OpenSSL context");
++ end_login(1);
++ }
++
++ /* We can only get the passphrases from certs once OpenSSL has been
++ * initialized.
++ */
++ tls_get_passphrases();
++
++ /* Install our control channel NetIO handlers. This is done here
++ * specifically because we need to cache a pointer to the nstrm that
++ * is passed to the open callback(). Ideally we'd only install our
++ * custom NetIO handlers if the appropriate AUTH command was given.
++ * But by then, the open() callback will have already been called, and
++ * we will not have a chance to get that nstrm pointer.
++ */
++ tls_netio_install_ctrl();
++}
++
++/* Initialization routines
++ */
++
++static int tls_init(void) {
++
++ /* Check that the OpenSSL headers used match the version of the
++ * OpenSSL library used.
++ *
++ * For now, we only log if there is a difference.
++ */
++ if (SSLeay() != OPENSSL_VERSION_NUMBER) {
++ pr_log_pri(PR_LOG_ERR, MOD_TLS_VERSION
++ ": compiled using OpenSSL version '%s' headers, but linked to "
++ "OpenSSL version '%s' library", OPENSSL_VERSION_TEXT,
++ SSLeay_version(SSLEAY_VERSION));
++ tls_log("compiled using OpenSSL version '%s' headers, but linked to "
++ "OpenSSL version '%s' library", OPENSSL_VERSION_TEXT,
++ SSLeay_version(SSLEAY_VERSION));
++ }
++
++ pr_log_debug(DEBUG2, MOD_TLS_VERSION ": using " OPENSSL_VERSION_TEXT);
++
++ pr_event_register(&tls_module, "core.exit", tls_shutdown_ev, NULL);
++#if defined(PR_SHARED_MODULE)
++ pr_event_register(&tls_module, "core.module-unload", tls_mod_unload_ev, NULL);
++#endif /* PR_SHARED_MODULE */
++ pr_event_register(&tls_module, "core.postparse", tls_postparse_ev, NULL);
++ pr_event_register(&tls_module, "core.restart", tls_restart_ev, NULL);
++
++ SSL_load_error_strings();
++ SSL_library_init();
++
++ /* It looks like calling OpenSSL_add_all_algorithms() is necessary for
++ * handling some algorithms (e.g. PKCS12 files) which are NOT added by
++ * just calling SSL_library_init().
++ */
++ OpenSSL_add_all_algorithms();
++
++#ifdef PR_USE_CTRLS
++ if (pr_ctrls_register(&tls_module, "tls", "query/tune mod_tls settings",
++ tls_handle_tls) < 0) {
++ pr_log_pri(PR_LOG_INFO, MOD_TLS_VERSION
++ ": error registering 'tls' control: %s", strerror(errno));
++
++ } else {
++ register unsigned int i;
++
++ tls_act_pool = make_sub_pool(permanent_pool);
++ pr_pool_tag(tls_act_pool, "TLS Controls Pool");
++
++ for (i = 0; tls_acttab[i].act_action; i++) {
++ tls_acttab[i].act_acl = palloc(tls_act_pool, sizeof(ctrls_acl_t));
++ pr_ctrls_init_acl(tls_acttab[i].act_acl);
++ }
++ }
++#endif /* PR_USE_CTRLS */
++
++ return 0;
++}
++
++static int tls_sess_init(void) {
++ int res = 0;
++ unsigned char *tmp = NULL;
++ unsigned long *opts = NULL;
++ config_rec *c = NULL;
++
++ /* Unregister the listener for the 'core.exit' event that was registered
++ * for the daemon process; we inherited it due to the fork, but we don't
++ * want that listener being invoked when we exit.
++ */
++ pr_event_unregister(&tls_module, "core.exit", tls_shutdown_ev);
++
++ /* First, check to see whether mod_tls is even enabled. */
++ tmp = get_param_ptr(main_server->conf, "TLSEngine", FALSE);
++ if (tmp != NULL &&
++ *tmp == TRUE) {
++ tls_engine = TRUE;
++
++ } else {
++
++ /* No need for this modules's control channel NetIO handlers
++ * anymore.
++ */
++ pr_unregister_netio(PR_NETIO_STRM_CTRL);
++
++ /* No need for all the OpenSSL stuff in this process space, either.
++ */
++ tls_cleanup(TLS_CLEANUP_FL_SESS_INIT);
++ tls_scrub_pkeys();
++
++ return 0;
++ }
++
++ tls_cipher_suite = get_param_ptr(main_server->conf, "TLSCipherSuite",
++ FALSE);
++ if (tls_cipher_suite == NULL)
++ tls_cipher_suite = TLS_DEFAULT_CIPHER_SUITE;
++
++ tls_crl_file = get_param_ptr(main_server->conf, "TLSCARevocationFile", FALSE);
++ tls_crl_path = get_param_ptr(main_server->conf, "TLSCARevocationPath", FALSE);
++
++ tls_dhparam_file = get_param_ptr(main_server->conf, "TLSDHParamFile", FALSE);
++
++ tls_dsa_cert_file = get_param_ptr(main_server->conf, "TLSDSACertificateFile",
++ FALSE);
++ tls_dsa_key_file = get_param_ptr(main_server->conf,
++ "TLSDSACertificateKeyFile", FALSE);
++
++ tls_pkcs12_file = get_param_ptr(main_server->conf, "TLSPKCS12File", FALSE);
++
++ tls_rsa_cert_file = get_param_ptr(main_server->conf, "TLSRSACertificateFile",
++ FALSE);
++ tls_rsa_key_file = get_param_ptr(main_server->conf,
++ "TLSRSACertificateKeyFile", FALSE);
++
++ opts = get_param_ptr(main_server->conf, "TLSOptions", FALSE);
++ if (opts != NULL)
++ tls_opts = *opts;
++
++#if OPENSSL_VERSION_NUMBER > 0x009080cfL
++ /* The OpenSSL team realized that the flag added in 0.9.8l, the
++ * SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION flag, was a bad idea.
++ * So in later versions, it was changed to a context flag,
++ * SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION.
++ */
++ if (tls_opts & TLS_OPT_ALLOW_CLIENT_RENEGOTIATIONS) {
++ int ssl_opts;
++
++ ssl_opts = SSL_CTX_get_options(ssl_ctx);
++ ssl_opts |= SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION;
++ SSL_CTX_set_options(ssl_ctx, ssl_opts);
++ }
++#endif
++
++ tmp = get_param_ptr(main_server->conf, "TLSVerifyClient", FALSE);
++ if (tmp!= NULL &&
++ *tmp == TRUE) {
++ int *depth = NULL;
++ tls_flags |= TLS_SESS_VERIFY_CLIENT;
++
++ depth = get_param_ptr(main_server->conf, "TLSVerifyDepth", FALSE);
++ if (depth != NULL)
++ tls_verify_depth = *depth;
++ }
++
++ c = find_config(main_server->conf, CONF_PARAM, "TLSRequired", FALSE);
++ if (c) {
++ tls_required_on_ctrl = *((int *) c->argv[0]);
++ tls_required_on_data = *((int *) c->argv[1]);
++ tls_required_on_auth = *((int *) c->argv[2]);
++ }
++
++ c = find_config(main_server->conf, CONF_PARAM, "TLSTimeoutHandshake", FALSE);
++ if (c)
++ tls_handshake_timeout = *((unsigned int *) c->argv[0]);
++
++ /* Open the TLSLog, if configured */
++ res = tls_openlog();
++ if (res < 0) {
++ if (res == -1) {
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION
++ ": notice: unable to open TLSLog: %s", strerror(errno));
++
++ } else if (res == PR_LOG_WRITABLE_DIR) {
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION
++ ": notice: unable to open TLSLog: parent directory is world writable");
++
++ } else if (res == PR_LOG_SYMLINK) {
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION
++ ": notice: unable to open TLSLog: cannot log to a symbolic link");
++ }
++ }
++
++ /* If UseReverseDNS is set to off, disable TLS_OPT_VERIFY_CERT_FQDN. */
++ if ((tls_opts & TLS_OPT_VERIFY_CERT_FQDN) &&
++ !ServerUseReverseDNS) {
++ tls_opts &= ~TLS_OPT_VERIFY_CERT_FQDN;
++ tls_log("%s", "reverse DNS off, disabling TLSOption dNSNameRequired");
++ }
++
++ /* We need to check for FIPS mode in the child process as well, in order
++ * to re-seed the FIPS PRNG for this process ID. Annoying, isn't it?
++ */
++ if (pr_define_exists("TLS_USE_FIPS") &&
++ ServerType == SERVER_STANDALONE) {
++#ifdef OPENSSL_FIPS
++ if (!FIPS_mode()) {
++ /* Make sure OpenSSL is set to use the default RNG, as per an email
++ * discussion on the OpenSSL developer list:
++ *
++ * "The internal FIPS logic uses the default RNG to see the FIPS RNG
++ * as part of the self test process..."
++ */
++ RAND_set_rand_method(NULL);
++
++ if (!FIPS_mode_set(1)) {
++ const char *errstr;
++
++ errstr = tls_get_errors();
++
++ tls_log("unable to use FIPS mode: %s", errstr);
++ pr_log_pri(PR_LOG_ERR, MOD_TLS_VERSION ": unable to use FIPS mode: %s",
++ errstr);
++
++ errno = EPERM;
++ return -1;
++
++ } else {
++ tls_log("FIPS mode enabled");
++ pr_log_pri(PR_LOG_NOTICE, MOD_TLS_VERSION ": FIPS mode enabled");
++ }
++
++ } else {
++ tls_log("FIPS mode already enabled");
++ }
++#else
++ pr_log_pri(PR_LOG_WARNING, MOD_TLS_VERSION ": FIPS mode requested, but " OPENSSL_VERSION_TEXT " not built with FIPS support");
++#endif /* OPENSSL_FIPS */
++ }
++
++ /* Update the session ID context to use. This is important; it ensures
++ * that the session IDs for this particular vhost will differ from those
++ * for another vhost. An external SSL session cache will possibly
++ * cache sessions from all vhosts together, and we need to keep them
++ * separate.
++ */
++ SSL_CTX_set_session_id_context(ssl_ctx, (unsigned char *) main_server,
++ sizeof(main_server));
++
++ /* Update the session ID context to use. This is important; it ensures
++ * that the session IDs for this particular vhost will differ from those
++ * for another vhost. An external SSL session cache will possibly
++ * cache sessions from all vhosts together, and we need to keep them
++ * separate.
++ */
++ SSL_CTX_set_session_id_context(ssl_ctx, (unsigned char *) main_server,
++ sizeof(main_server));
++
++ /* Install our data channel NetIO handlers. */
++ tls_netio_install_data();
++
++ pr_event_register(&tls_module, "core.exit", tls_exit_ev, NULL);
++
++ /* There are several timeouts which can cause the client to be disconnected;
++ * register a listener for them which can politely/cleanly shut the SSL/TLS
++ * session down before the connection is closed.
++ */
++ pr_event_register(&tls_module, "core.timeout-idle", tls_timeout_ev, NULL);
++ pr_event_register(&tls_module, "core.timeout-login", tls_timeout_ev, NULL);
++ pr_event_register(&tls_module, "core.timeout-no-transfer", tls_timeout_ev,
++ NULL);
++ pr_event_register(&tls_module, "core.timeout-session", tls_timeout_ev, NULL);
++ pr_event_register(&tls_module, "core.timeout-stalled", tls_timeout_ev, NULL);
++
++ /* Check to see if a passphrase has been entered for this server. */
++ tls_pkey = tls_lookup_pkey();
++ if (tls_pkey != NULL) {
++ SSL_CTX_set_default_passwd_cb(ssl_ctx, tls_pkey_cb);
++ SSL_CTX_set_default_passwd_cb_userdata(ssl_ctx, (void *) tls_pkey);
++ }
++
++ /* We always install an info callback, in order to watch for
++ * client-initiated session renegotiations (Bug#3324). If EnableDiags
++ * is enabled, that info callback will also log the OpenSSL diagnostic
++ * information.
++ */
++ SSL_CTX_set_info_callback(ssl_ctx, tls_diags_cb);
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ /* Install a callback for logging OpenSSL message information,
++ * if requested.
++ */
++ if (tls_opts & TLS_OPT_ENABLE_DIAGS) {
++ tls_log("%s",
++ "TLSOption EnableDiags enabled, setting diagnostics callback");
++ SSL_CTX_set_msg_callback(ssl_ctx, tls_msg_cb);
++ }
++#endif
++
++#if OPENSSL_VERSION_NUMBER > 0x000907000L
++ /* Handle any requested crypto accelerators/drivers. */
++ c = find_config(main_server->conf, CONF_PARAM, "TLSCryptoDevice", FALSE);
++ if (c) {
++ tls_crypto_device = (const char *) c->argv[0];
++
++ if (strcasecmp(tls_crypto_device, "ALL") == 0) {
++ /* Load all ENGINE implementations bundled with OpenSSL. */
++ ENGINE_load_builtin_engines();
++ ENGINE_register_all_complete();
++
++ tls_log("%s", "enabled all builtin crypto devices");
++
++ } else {
++ ENGINE *e;
++
++ /* Load all ENGINE implementations bundled with OpenSSL. */
++ ENGINE_load_builtin_engines();
++
++ e = ENGINE_by_id(tls_crypto_device);
++ if (e) {
++ if (ENGINE_init(e)) {
++ if (ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
++ ENGINE_finish(e);
++ ENGINE_free(e);
++
++ tls_log("using TLSCryptoDevice '%s'", tls_crypto_device);
++
++ } else {
++ /* The requested driver could not be used as the default for
++ * some odd reason.
++ */
++ tls_log("unable to register TLSCryptoDevice '%s' as the "
++ "default: %s", tls_crypto_device, tls_get_errors());
++
++ ENGINE_finish(e);
++ ENGINE_free(e);
++ e = NULL;
++ tls_crypto_device = NULL;
++ }
++
++ } else {
++ /* The requested driver could not be initialized. */
++ tls_log("unable to initialize TLSCryptoDevice '%s': %s",
++ tls_crypto_device, tls_get_errors());
++
++ ENGINE_free(e);
++ e = NULL;
++ tls_crypto_device = NULL;
++ }
++
++ } else {
++ /* The requested driver is not available. */
++ tls_log("TLSCryptoDevice '%s' is not available", tls_crypto_device);
++ tls_crypto_device = NULL;
++ }
++ }
++ }
++#endif
++
++ /* NOTE: fail session init if TLS server init fails (e.g. res < 0)? */
++ /* Initialize the OpenSSL context for this server's configuration. */
++ res = tls_init_server();
++
++ /* Add the additional features implemented by this module into the
++ * list, to be displayed in response to a FEAT command.
++ */
++ pr_feat_add("AUTH TLS");
++ pr_feat_add("PBSZ");
++ pr_feat_add("PROT");
++
++ /* Add the commands handled by this module to the HELP list. */
++ pr_help_add(C_AUTH, "<sp> base64-data", TRUE);
++ pr_help_add(C_PBSZ, "<sp> protection buffer size", TRUE);
++ pr_help_add(C_PROT, "<sp> protection code", TRUE);
++
++ if (tls_opts & TLS_OPT_USE_IMPLICIT_SSL) {
++ tls_log("%s", "TLSOption UseImplicitSSL in effect, starting SSL/TLS "
++ "handshake");
++
++ if (tls_accept(session.c, FALSE) < 0) {
++ tls_log("%s", "implicit SSL/TLS negotiation failed on control channel");
++
++ errno = EACCES;
++ return -1;
++ }
++
++ tls_flags |= TLS_SESS_ON_CTRL;
++
++ pr_session_set_protocol("ftps");
++ session.rfc2228_mech = "TLS";
++ }
++
++ return 0;
++}
++
++#ifdef PR_USE_CTRLS
++static ctrls_acttab_t tls_acttab[] = {
++ { "clear", NULL, NULL, NULL },
++ { "info", NULL, NULL, NULL },
++ { "remove", NULL, NULL, NULL },
++ { "sesscache", NULL, NULL, NULL },
++
++ { NULL, NULL, NULL, NULL }
++};
++
++#endif /* PR_USE_CTRLS */
++
++/* Module API tables
++ */
++
++static conftable tls_conftab[] = {
++ { "TLSCACertificateFile", set_tlscacertfile, NULL },
++ { "TLSCACertificatePath", set_tlscacertpath, NULL },
++ { "TLSCARevocationFile", set_tlscacrlfile, NULL },
++ { "TLSCARevocationPath", set_tlscacrlpath, NULL },
++ { "TLSCertificateChainFile", set_tlscertchain, NULL },
++ { "TLSCipherSuite", set_tlsciphersuite, NULL },
++ { "TLSControlsACLs", set_tlsctrlsacls, NULL },
++ { "TLSCryptoDevice", set_tlscryptodevice, NULL },
++ { "TLSDHParamFile", set_tlsdhparamfile, NULL },
++ { "TLSDSACertificateFile", set_tlsdsacertfile, NULL },
++ { "TLSDSACertificateKeyFile", set_tlsdsakeyfile, NULL },
++ { "TLSEngine", set_tlsengine, NULL },
++ { "TLSLog", set_tlslog, NULL },
++ { "TLSOptions", set_tlsoptions, NULL },
++ { "TLSPassPhraseProvider", set_tlspassphraseprovider, NULL },
++ { "TLSPKCS12File", set_tlspkcs12file, NULL },
++ { "TLSProtocol", set_tlsprotocol, NULL },
++ { "TLSRandomSeed", set_tlsrandseed, NULL },
++ { "TLSRenegotiate", set_tlsrenegotiate, NULL },
++ { "TLSRequired", set_tlsrequired, NULL },
++ { "TLSRSACertificateFile", set_tlsrsacertfile, NULL },
++ { "TLSRSACertificateKeyFile", set_tlsrsakeyfile, NULL },
++ { "TLSSessionCache", set_tlssessioncache, NULL },
++ { "TLSTimeoutHandshake", set_tlstimeouthandshake,NULL },
++ { "TLSVerifyClient", set_tlsverifyclient, NULL },
++ { "TLSVerifyDepth", set_tlsverifydepth, NULL },
++ { "TLSVerifyOrder", set_tlsverifyorder, NULL },
++ { NULL , NULL, NULL}
++};
++
++static cmdtable tls_cmdtab[] = {
++ { PRE_CMD, C_ANY, G_NONE, tls_any, FALSE, FALSE },
++ { CMD, C_AUTH, G_NONE, tls_auth, FALSE, FALSE, CL_SEC },
++ { CMD, C_CCC, G_NONE, tls_ccc, FALSE, FALSE, CL_SEC },
++ { CMD, C_PBSZ, G_NONE, tls_pbsz, FALSE, FALSE, CL_SEC },
++ { CMD, C_PROT, G_NONE, tls_prot, FALSE, FALSE, CL_SEC },
++ { POST_CMD, C_PASS, G_NONE, tls_post_pass, FALSE, FALSE, CL_SEC },
++ { 0, NULL }
++};
++
++static authtable tls_authtab[] = {
++ { 0, "auth", tls_authenticate },
++ { 0, "check", tls_auth_check },
++ { 0, "requires_pass", tls_authenticate },
++ { 0, NULL }
++};
++
++module tls_module = {
++
++ /* Always NULL */
++ NULL, NULL,
++
++ /* Module API version */
++ 0x20,
++
++ /* Module name */
++ "tls",
++
++ /* Module configuration handler table */
++ tls_conftab,
++
++ /* Module command handler table */
++ tls_cmdtab,
++
++ /* Module authentication handler table */
++ tls_authtab,
++
++ /* Module initialization */
++ tls_init,
++
++ /* Session initialization */
++ tls_sess_init,
++
++ /* Module version */
++ MOD_TLS_VERSION
++};
++
--
ProFTPD core package
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