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2cb4d51654
* qatar/master: v410dec: Implement explode mode support zerocodec: fix direct rendering. wav: init st to NULL to avoid a false-positive warning. wavpack: set bits_per_raw_sample for S32 samples to properly identify 24-bit h264: refactor NAL decode loop RTMPTE protocol support RTMPE protocol support rtmp: Add ff_rtmp_calc_digest_pos() rtmp: Rename rtmp_calc_digest to ff_rtmp_calc_digest and make it global swscale: add missing HAVE_INLINE_ASM check. lavfi: place x86 inline assembly under HAVE_INLINE_ASM. vc1: Add a test for interlaced field pictures swscale: Mark all init functions as av_cold swscale: x86: Drop pointless _mmx suffix from filenames lavf: use conditional notation for default codec in muxer declarations. swscale: place inline assembly bilinear scaler under HAVE_INLINE_ASM. dsputil: ppc: cosmetics: pretty-print dsputil: x86: add SHUFFLE_MASK_W macro configure: respect CC_O setting in check_cc Conflicts: Changelog configure libavcodec/v410dec.c libavcodec/zerocodec.c libavformat/asfenc.c libavformat/version.h libswscale/utils.c libswscale/x86/swscale.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
/*
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* RTMP Diffie-Hellmann utilities
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* Copyright (c) 2012 Samuel Pitoiset
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFORMAT_RTMPDH_H
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#define AVFORMAT_RTMPDH_H
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#include "avformat.h"
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#include "config.h"
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#if CONFIG_NETTLE || CONFIG_GCRYPT
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#if CONFIG_NETTLE
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#include <gmp.h>
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#include <nettle/bignum.h>
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typedef mpz_ptr FFBigNum;
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#elif CONFIG_GCRYPT
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#include <gcrypt.h>
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typedef gcry_mpi_t FFBigNum;
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#endif
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typedef struct FF_DH {
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FFBigNum p;
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FFBigNum g;
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FFBigNum pub_key;
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FFBigNum priv_key;
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long length;
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} FF_DH;
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#elif CONFIG_OPENSSL
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#include <openssl/bn.h>
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#include <openssl/dh.h>
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typedef BIGNUM *FFBigNum;
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typedef DH FF_DH;
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#endif
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/**
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* Initialize a Diffie-Hellmann context.
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*
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* @param key_len length of the key
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* @return a new Diffie-Hellmann context on success, NULL otherwise
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*/
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FF_DH *ff_dh_init(int key_len);
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/**
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* Free a Diffie-Hellmann context.
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*
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* @param dh a Diffie-Hellmann context to free
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*/
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void ff_dh_free(FF_DH *dh);
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/**
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* Generate a public key.
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*
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* @param dh a Diffie-Hellmann context
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* @return zero on success, negative value otherwise
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*/
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int ff_dh_generate_public_key(FF_DH *dh);
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/**
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* Write the public key into the given buffer.
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*
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* @param dh a Diffie-Hellmann context, containing the public key to write
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* @param pub_key the buffer where the public key is written
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* @param pub_key_len the length of the buffer
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* @return zero on success, negative value otherwise
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*/
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int ff_dh_write_public_key(FF_DH *dh, uint8_t *pub_key, int pub_key_len);
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/**
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* Compute the shared secret key from the private FF_DH value and the
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* other party's public value.
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*
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* @param dh a Diffie-Hellmann context, containing the private key
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* @param pub_key the buffer containing the public key
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* @param pub_key_len the length of the buffer
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* @param secret_key the buffer where the secret key is written
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* @return length of the shared secret key on success, negative value otherwise
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*/
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int ff_dh_compute_shared_secret_key(FF_DH *dh, const uint8_t *pub_key,
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int pub_key_len, uint8_t *secret_key);
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#endif /* AVFORMAT_RTMPDH_H */
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