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rtmpdh: Use GMP functions directly, instead of nettle wrappers

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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>
This commit is contained in:
Martin Storsjö 2015-05-31 23:46:56 +03:00
parent 84c5ff911f
commit 63ce9fd23c
3 changed files with 14 additions and 10 deletions
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6
configure vendored
View File

@ -1590,6 +1590,7 @@ CONFIG_EXTRA="
fdctdsp
fmtconvert
gcrypt
gmp
golomb
gplv3
h263dsp
@ -1614,7 +1615,6 @@ CONFIG_EXTRA="
mpegaudiodsp
mpegvideo
mpegvideoenc
nettle
pixblockdsp
qpeldsp
qsv
@ -2184,7 +2184,7 @@ x11grab_xcb_indev_deps="libxcb"
# protocols
ffrtmpcrypt_protocol_deps="!librtmp_protocol"
ffrtmpcrypt_protocol_deps_any="gcrypt nettle openssl"
ffrtmpcrypt_protocol_deps_any="gcrypt gmp openssl"
ffrtmpcrypt_protocol_select="tcp_protocol"
ffrtmphttp_protocol_deps="!librtmp_protocol"
ffrtmphttp_protocol_select="http_protocol"
@ -4336,7 +4336,7 @@ enabled openssl && { check_lib openssl/ssl.h SSL_library_init -lssl -l
die "ERROR: openssl not found"; }
if enabled gnutls; then
{ check_lib nettle/bignum.h nettle_mpz_get_str_256 -lnettle -lhogweed -lgmp && enable nettle; } ||
{ check_lib2 gmp.h mpz_export -lgmp && enable gmp; } ||
{ check_lib gcrypt.h gcry_mpi_new -lgcrypt && enable gcrypt; }
fi

13
libavformat/rtmpdh.c
View File

@ -46,8 +46,8 @@
"F71C35FDAD44CFD2D74F9208BE258FF324943328F67329C0" \
"FFFFFFFFFFFFFFFF"
#if CONFIG_NETTLE || CONFIG_GCRYPT
#if CONFIG_NETTLE
#if CONFIG_GMP || CONFIG_GCRYPT
#if CONFIG_GMP
#define bn_new(bn) \
do { \
bn = av_malloc(sizeof(*bn)); \
@ -65,12 +65,17 @@
#define bn_sub_word(bn, w) mpz_sub_ui(bn, bn, w)
#define bn_cmp_1(bn) mpz_cmp_ui(bn, 1)
#define bn_num_bytes(bn) (mpz_sizeinbase(bn, 2) + 7) / 8
#define bn_bn2bin(bn, buf, len) nettle_mpz_get_str_256(len, buf, bn)
#define bn_bn2bin(bn, buf, len) \
do { \
memset(buf, 0, len); \
if (bn_num_bytes(bn) <= len) \
mpz_export(buf, NULL, 1, 1, 0, 0, bn); \
} while (0)
#define bn_bin2bn(bn, buf, len) \
do { \
bn_new(bn); \
if (bn) \
nettle_mpz_set_str_256_u(bn, len, buf); \
mpz_import(bn, len, 1, 1, 0, 0, buf); \
} while (0)
#define bn_hex2bn(bn, buf, ret) \
do { \

5
libavformat/rtmpdh.h
View File

@ -25,10 +25,9 @@
#include "avformat.h"
#include "config.h"
#if CONFIG_NETTLE || CONFIG_GCRYPT
#if CONFIG_NETTLE
#if CONFIG_GMP || CONFIG_GCRYPT
#if CONFIG_GMP
#include <gmp.h>
#include <nettle/bignum.h>
typedef mpz_ptr FFBigNum;
#elif CONFIG_GCRYPT