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2ba45a60 DM |
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 */ |