/*
* SRTP encryption/decryption
* Copyright (c) 2012 Martin Storsjo
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_SRTP_H
#define AVFORMAT_SRTP_H
#include <stdint.h>
struct AVAES;
struct AVHMAC;
struct SRTPContext {
struct AVAES *aes;
struct AVHMAC *hmac;
int rtp_hmac_size, rtcp_hmac_size;
uint8_t master_key[16];
uint8_t master_salt[14];
uint8_t rtp_key[16], rtcp_key[16];
uint8_t rtp_salt[14], rtcp_salt[14];
uint8_t rtp_auth[20], rtcp_auth[20];
int seq_largest, seq_initialized;
uint32_t roc;
uint32_t rtcp_index;
};
int ff_srtp_set_crypto(struct SRTPContext *s, const char *suite,
const char *params);
void ff_srtp_free(struct SRTPContext *s);
int ff_srtp_decrypt(struct SRTPContext *s, uint8_t *buf, int *lenptr);
int ff_srtp_encrypt(struct SRTPContext *s, const uint8_t *in, int len,
uint8_t *out, int outlen);
#endif /* AVFORMAT_SRTP_H */