diff options
author | Samuel Pitoiset <samuel.pitoiset@gmail.com> | 2012-07-19 16:13:58 +0400 |
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committer | Martin Storsjö <martin@martin.st> | 2012-07-23 17:32:07 +0400 |
commit | acd554c103459ae7a5d89caa611e91bbc9bf695f (patch) | |
tree | 7e591295c7f7057bc6e8c3da4ef7d825611c868b /libavformat/rtmpdh.h | |
parent | 0e31088b6c57e7d495deda0abaf5de5adb2c18fa (diff) |
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>
Diffstat (limited to 'libavformat/rtmpdh.h')
-rw-r--r-- | libavformat/rtmpdh.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/libavformat/rtmpdh.h b/libavformat/rtmpdh.h new file mode 100644 index 0000000000..5de8bde821 --- /dev/null +++ b/libavformat/rtmpdh.h @@ -0,0 +1,102 @@ +/* + * RTMP Diffie-Hellmann utilities + * Copyright (c) 2012 Samuel Pitoiset + * + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVFORMAT_RTMPDH_H +#define AVFORMAT_RTMPDH_H + +#include "avformat.h" +#include "config.h" + +#if CONFIG_NETTLE || CONFIG_GCRYPT +#if CONFIG_NETTLE +#include <gmp.h> +#include <nettle/bignum.h> + +typedef mpz_ptr FFBigNum; +#elif CONFIG_GCRYPT +#include <gcrypt.h> + +typedef gcry_mpi_t FFBigNum; +#endif + +typedef struct FF_DH { + FFBigNum p; + FFBigNum g; + FFBigNum pub_key; + FFBigNum priv_key; + long length; +} FF_DH; + +#elif CONFIG_OPENSSL +#include <openssl/bn.h> +#include <openssl/dh.h> + +typedef BIGNUM *FFBigNum; +typedef DH FF_DH; +#endif + +/** + * Initialize a Diffie-Hellmann context. + * + * @param key_len length of the key + * @return a new Diffie-Hellmann context on success, NULL otherwise + */ +FF_DH *ff_dh_init(int key_len); + +/** + * Free a Diffie-Hellmann context. + * + * @param dh a Diffie-Hellmann context to free + */ +void ff_dh_free(FF_DH *dh); + +/** + * Generate a public key. + * + * @param dh a Diffie-Hellmann context + * @return zero on success, negative value otherwise + */ +int ff_dh_generate_public_key(FF_DH *dh); + +/** + * Write the public key into the given buffer. + * + * @param dh a Diffie-Hellmann context, containing the public key to write + * @param pub_key the buffer where the public key is written + * @param pub_key_len the length of the buffer + * @return zero on success, negative value otherwise + */ +int ff_dh_write_public_key(FF_DH *dh, uint8_t *pub_key, int pub_key_len); + +/** + * Compute the shared secret key from the private FF_DH value and the + * other party's public value. + * + * @param dh a Diffie-Hellmann context, containing the private key + * @param pub_key the buffer containing the public key + * @param pub_key_len the length of the buffer + * @param secret_key the buffer where the secret key is written + * @return length of the shared secret key on success, negative value otherwise + */ +int ff_dh_compute_shared_secret_key(FF_DH *dh, const uint8_t *pub_key, + int pub_key_len, uint8_t *secret_key); + +#endif /* AVFORMAT_RTMPDH_H */ |