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rtmpdh: Create sufficiently long private keys for gcrypt/nettle

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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>
This commit is contained in:
Martin Storsjö 2015-05-28 11:42:44 +03:00
parent 8016a1bd3b
commit e9e86d9ef6
1 changed files with 4 additions and 4 deletions
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8
libavformat/rtmpdh.c
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@ -81,12 +81,12 @@
ret = 1; \
} while (0)
#define bn_modexp(bn, y, q, p) mpz_powm(bn, y, q, p)
#define bn_random(bn, num_bytes) \
#define bn_random(bn, num_bits) \
do { \
gmp_randstate_t rs; \
gmp_randinit_mt(rs); \
gmp_randseed_ui(rs, av_get_random_seed()); \
mpz_urandomb(bn, rs, num_bytes); \
mpz_urandomb(bn, rs, num_bits); \
gmp_randclear(rs); \
} while (0)
#elif CONFIG_GCRYPT
@ -102,7 +102,7 @@
#define bn_bin2bn(bn, buf, len) gcry_mpi_scan(&bn, GCRYMPI_FMT_USG, buf, len, NULL)
#define bn_hex2bn(bn, buf, ret) ret = (gcry_mpi_scan(&bn, GCRYMPI_FMT_HEX, buf, 0, 0) == 0)
#define bn_modexp(bn, y, q, p) gcry_mpi_powm(bn, y, q, p)
#define bn_random(bn, num_bytes) gcry_mpi_randomize(bn, num_bytes, GCRY_WEAK_RANDOM)
#define bn_random(bn, num_bits) gcry_mpi_randomize(bn, num_bits, GCRY_WEAK_RANDOM)
#endif
#define MAX_BYTES 18000
@ -120,7 +120,7 @@ static FFBigNum dh_generate_key(FF_DH *dh)
bn_new(dh->priv_key);
if (!dh->priv_key)
return NULL;
bn_random(dh->priv_key, num_bytes);
bn_random(dh->priv_key, 8 * num_bytes);
bn_new(dh->pub_key);
if (!dh->pub_key) {