[Pkg-privacy-commits] [obfs4proxy] 91/151: Change the TYPE_PRNG_SEED length to 24.

[Ximin Luo]

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infinity0 pushed a commit to branch master
in repository obfs4proxy.

commit 94d3fe9a0802e2614d4a4b9297ed57b1979865fc
Author: Yawning Angel <yawning at torproject.org>
Date:   Wed Aug 27 12:26:09 2014 +0000

    Change the TYPE_PRNG_SEED length to 24.
    
    This matches what the code actually sends.  It's shorter than the
    ScrambleSuit PRNG seed, but that's because the SipHash-2-4 based
    Hash_DRBG has 24 bytes of internal state (key + initial output).
---
 doc/obfs4-spec.txt | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/obfs4-spec.txt b/doc/obfs4-spec.txt
index d2aa859..0e844a1 100644
--- a/doc/obfs4-spec.txt
+++ b/doc/obfs4-spec.txt
@@ -104,7 +104,7 @@
 
        Length of the ntor AUTH tag (A HMAC-SHA256 digest).
 
-     InlineSeedFrameLength = 53
+     InlineSeedFrameLength = 45
 
        Length of a unpadded TYPE_PRNG_SEED frame.
 
@@ -144,7 +144,7 @@
 
    The amount of padding is chosen such that the smallest possible request and
    response (requests and responses with the minimum amount of padding) are
-   equal in size.  For details on the InlineSeedFrameLength, see section 7.
+   equal in size.  For details on the InlineSeedFrameLength, see section 6.
 
    The client handshake process is as follows.
 
@@ -282,7 +282,7 @@
      TYPE_PRNG_SEED (0x01):
 
          The entire payload is to be treated as seeding material for the
-         protocol polymorphism PRNG.  The format is 32 bytes of seeding
+         protocol polymorphism PRNG.  The format is 24 bytes of seeding
          material.
 
    Implementations SHOULD ignore unknown packet types for the purposes of

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