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Commit Graph

12 Commits

Author SHA1 Message Date
Martin Storsjö
63ce9fd23c rtmpdh: Use GMP functions directly, instead of nettle wrappers
mpz_import and mpz_export were added in GMP 4.1, in 2002.

This simplifies the DH code by clarifying that it only uses pure
bignum functions, no other parts of nettle/hogweed.

Signed-off-by: Martin Storsjö <martin@martin.st>
2015-06-01 10:38:54 +03:00
Martin Storsjö
b2f0f37d24 rtmpdh: Generate the whole private exponent using av_get_random_seed() with nettle/gmp
Don't use a PRNG for generating it; that defies the intended use
within the cryptograhic handshake.

Signed-off-by: Martin Storsjö <martin@martin.st>
2015-05-29 23:33:03 +03:00
Martin Storsjö
e9e86d9ef6 rtmpdh: Create sufficiently long private keys for gcrypt/nettle
There was a misunderstanding betewen bits and bytes for the parameter
value for generating random big numbers.

Signed-off-by: Martin Storsjö <martin@martin.st>
2015-05-29 09:42:41 +03:00
Martin Storsjö
8016a1bd3b rtmpdh: Remove an unnecessary check in the gcrypt/nettle dh_compute_key
Signed-off-by: Martin Storsjö <martin@martin.st>
2015-05-29 09:42:38 +03:00
Martin Storsjö
063f7467e4 rtmpdh: Add fate test for the DH handshake routine
This helps if these functions need to be implemented using another
crypto API.

Signed-off-by: Martin Storsjö <martin@martin.st>
2015-05-29 09:42:35 +03:00
Martin Storsjö
0508faaa11 rtmpdh: Pass the actual buffer size of the output secret key
Signed-off-by: Martin Storsjö <martin@martin.st>
2015-05-29 09:42:32 +03:00
Martin Storsjö
9f1b3050d9 rtmpdh: Check the output buffer size in the openssl version of dh_compute_key
Signed-off-by: Martin Storsjö <martin@martin.st>
2015-05-29 09:42:30 +03:00
Martin Storsjö
127d813bcb rtmpdh: Fix a local variable name in the nettle/gcrypt codepath
Signed-off-by: Martin Storsjö <martin@martin.st>
2015-05-29 09:42:28 +03:00
Martin Storsjö
78efc69e7c rtmpdh: Make sure ret is initialized in the nettle version of bn_hex2bn
Signed-off-by: Martin Storsjö <martin@martin.st>
2015-05-29 09:42:24 +03:00
Samuel Pitoiset
8337b5db96 rtmpdh: Do not generate the same private key every time when using libnettle
Replace mpz_random by mpz_urandomb with a random state initialization in
order to improve the randomness.

Signed-off-by: Martin Storsjö <martin@martin.st>
2012-08-17 23:51:53 +03:00
Martin Storsjö
6a433fdba8 rtmp: Add credit/copyright to librtmp authors for parts of the RTMPE code
Our implementation of RTMPE is heavily based on librtmp.

Signed-off-by: Martin Storsjö <martin@martin.st>
2012-07-24 18:13:26 +03:00
Samuel Pitoiset
acd554c103 RTMPE protocol support
This adds two protocols, but one of them is an internal implementation
detail just used as an abstraction layer/generalization in the code. The
RTMPE protocol implementation uses ffrtmpcrypt:// as an alternative to the
tcp:// protocol. This allows moving most of the lower level logic out
from the higher level generic rtmp code.

Signed-off-by: Martin Storsjö <martin@martin.st>
2012-07-23 16:32:07 +03:00