blob: 590a8c81b8b9205625514bbc675ba3ecd4ace7e3
1 | /* |
2 | * RTMPE encryption utilities |
3 | * Copyright (c) 2012 Samuel Pitoiset |
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_RTMPCRYPT_H |
23 | #define AVFORMAT_RTMPCRYPT_H |
24 | |
25 | #include <stdint.h> |
26 | |
27 | #include "url.h" |
28 | |
29 | /** |
30 | * Initialize the Diffie-Hellmann context and generate the public key. |
31 | * |
32 | * @param h an URLContext |
33 | * @param buf handshake data (1536 bytes) |
34 | * @return zero on success, negative value otherwise |
35 | */ |
36 | int ff_rtmpe_gen_pub_key(URLContext *h, uint8_t *buf); |
37 | |
38 | /** |
39 | * Compute the shared secret key and initialize the RC4 encryption. |
40 | * |
41 | * @param h an URLContext |
42 | * @param serverdata server data (1536 bytes) |
43 | * @param clientdata client data (1536 bytes) |
44 | * @param type the position of the server digest |
45 | * @return zero on success, negative value otherwise |
46 | */ |
47 | int ff_rtmpe_compute_secret_key(URLContext *h, const uint8_t *serverdata, |
48 | const uint8_t *clientdata, int type); |
49 | |
50 | /** |
51 | * Encrypt the signature. |
52 | * |
53 | * @param h an URLContext |
54 | * @param signature the signature to encrypt |
55 | * @param digest the digest used for finding the encryption key |
56 | * @param type type of encryption (8 for XTEA, 9 for Blowfish) |
57 | */ |
58 | void ff_rtmpe_encrypt_sig(URLContext *h, uint8_t *signature, |
59 | const uint8_t *digest, int type); |
60 | |
61 | /** |
62 | * Update the keystream and set RC4 keys for encryption. |
63 | * |
64 | * @param h an URLContext |
65 | * @return zero on success, negative value otherwise |
66 | */ |
67 | int ff_rtmpe_update_keystream(URLContext *h); |
68 | |
69 | #endif /* AVFORMAT_RTMPCRYPT_H */ |
70 |