blob: 3189f8f54bd0e15afc13f011930ecf64c3076371
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 |