yading@11: /*
yading@11:  * SRTP encryption/decryption
yading@11:  * Copyright (c) 2012 Martin Storsjo
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVFORMAT_SRTP_H
yading@11: #define AVFORMAT_SRTP_H
yading@11: 
yading@11: #include <stdint.h>
yading@11: 
yading@11: struct AVAES;
yading@11: struct AVHMAC;
yading@11: 
yading@11: struct SRTPContext {
yading@11:     struct AVAES *aes;
yading@11:     struct AVHMAC *hmac;
yading@11:     int rtp_hmac_size, rtcp_hmac_size;
yading@11:     uint8_t master_key[16];
yading@11:     uint8_t master_salt[14];
yading@11:     uint8_t rtp_key[16],  rtcp_key[16];
yading@11:     uint8_t rtp_salt[14], rtcp_salt[14];
yading@11:     uint8_t rtp_auth[20], rtcp_auth[20];
yading@11:     int seq_largest, seq_initialized;
yading@11:     uint32_t roc;
yading@11: 
yading@11:     uint32_t rtcp_index;
yading@11: };
yading@11: 
yading@11: int ff_srtp_set_crypto(struct SRTPContext *s, const char *suite,
yading@11:                        const char *params);
yading@11: void ff_srtp_free(struct SRTPContext *s);
yading@11: int ff_srtp_decrypt(struct SRTPContext *s, uint8_t *buf, int *lenptr);
yading@11: int ff_srtp_encrypt(struct SRTPContext *s, const uint8_t *in, int len,
yading@11:                     uint8_t *out, int outlen);
yading@11: 
yading@11: #endif /* AVFORMAT_SRTP_H */