Bug#920477: gnutls-bin: gnutls-cli benchmark outputs wrong results in 32bit arch

[Hiroyuki YAMAMORI]

Package: gnutls-bin
Version: 3.6.5-2
Severity: normal

Dear Maintainer,

Some fast ciphers(suites) are strange results.

$ gnutls-cli --benchmark-ciphers
Checking AEAD ciphers, payload size: 16384
             AES-128-GCM 96.93 MB/sec
             AES-128-CCM 0.31 GB/sec
       CHACHA20-POLY1305 157.18 MB/sec
(snip)
                    NULL 177.63 MB/sec

$ gnutls-cli --benchmark-tls-ciphers
Testing throughput in cipher/MAC combinations (payload: 1400 bytes)
                   AES-128-GCM - TLS1.2  45.26 MB/sec
                   AES-128-GCM - TLS1.3  45.01 MB/sec
                   AES-128-CCM - TLS1.2  129.46 MB/sec
(snip)

The following code is the cause.

"gnutls-3.6.5/src/benchmark.h" line 45

struct benchmark_st {
        struct timespec start;
        unsigned long size;      <== 32bit in i386 arch.
        sighandler_t old_handler;
#if defined(_WIN32)
        HANDLE wtimer;
        HANDLE wthread;
        LARGE_INTEGER alarm_timeout;
#endif
};

This size variable will overflow.

Thank you,
Hiroyuki YAMAMORI


-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 4.19.0-1-686-pae (SMP w/2 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages gnutls-bin depends on:
ii  libc6            2.28-5
ii  libgmp10         2:6.1.2+dfsg-4
ii  libgnutls-dane0  3.6.5-2
ii  libgnutls30      3.6.5-2
ii  libhogweed4      3.4.1~rc1-1
ii  libidn2-0        2.0.5-1
ii  libnettle6       3.4.1~rc1-1
ii  libopts25        1:5.18.12-4
ii  libp11-kit0      0.23.14-2
ii  libtasn1-6       4.13-3
ii  libunistring2    0.9.10-1

gnutls-bin recommends no packages.

gnutls-bin suggests no packages.

-- no debconf information