| 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 */ |