1 /* 2 * SRTP encryption/decryption 3 * Copyright (c) 2012 Martin Storsjo 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 #ifndef AVFORMAT_SRTP_H 23 #define AVFORMAT_SRTP_H 24 25 #include <stdint.h> 26 27 struct AVAES; 28 struct AVHMAC; 29 30 struct SRTPContext { 31 struct AVAES *aes; 32 struct AVHMAC *hmac; 33 int rtp_hmac_size, rtcp_hmac_size; 34 uint8_t master_key[16]; 35 uint8_t master_salt[14]; 36 uint8_t rtp_key[16], rtcp_key[16]; 37 uint8_t rtp_salt[14], rtcp_salt[14]; 38 uint8_t rtp_auth[20], rtcp_auth[20]; 39 int seq_largest, seq_initialized; 40 uint32_t roc; 41 42 uint32_t rtcp_index; 43 }; 44 45 int ff_srtp_set_crypto(struct SRTPContext *s, const char *suite, 46 const char *params); 47 void ff_srtp_free(struct SRTPContext *s); 48 int ff_srtp_decrypt(struct SRTPContext *s, uint8_t *buf, int *lenptr); 49 int ff_srtp_encrypt(struct SRTPContext *s, const uint8_t *in, int len, 50 uint8_t *out, int outlen); 51 52 #endif /* AVFORMAT_SRTP_H */ 53