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