yading@11: /*
yading@11:  * RTMPE encryption utilities
yading@11:  * Copyright (c) 2012 Samuel Pitoiset
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #ifndef AVFORMAT_RTMPCRYPT_H
yading@11: #define AVFORMAT_RTMPCRYPT_H
yading@11: 
yading@11: #include <stdint.h>
yading@11: 
yading@11: #include "url.h"
yading@11: 
yading@11: /**
yading@11:  * Initialize the Diffie-Hellmann context and generate the public key.
yading@11:  *
yading@11:  * @param h     an URLContext
yading@11:  * @param buf   handshake data (1536 bytes)
yading@11:  * @return zero on success, negative value otherwise
yading@11:  */
yading@11: int ff_rtmpe_gen_pub_key(URLContext *h, uint8_t *buf);
yading@11: 
yading@11: /**
yading@11:  * Compute the shared secret key and initialize the RC4 encryption.
yading@11:  *
yading@11:  * @param h             an URLContext
yading@11:  * @param serverdata    server data (1536 bytes)
yading@11:  * @param clientdata    client data (1536 bytes)
yading@11:  * @param type          the position of the server digest
yading@11:  * @return zero on success, negative value otherwise
yading@11:  */
yading@11: int ff_rtmpe_compute_secret_key(URLContext *h, const uint8_t *serverdata,
yading@11:                                 const uint8_t *clientdata, int type);
yading@11: 
yading@11: /**
yading@11:  * Encrypt the signature.
yading@11:  *
yading@11:  * @param h             an URLContext
yading@11:  * @param signature     the signature to encrypt
yading@11:  * @param digest        the digest used for finding the encryption key
yading@11:  * @param type          type of encryption (8 for XTEA, 9 for Blowfish)
yading@11:  */
yading@11: void ff_rtmpe_encrypt_sig(URLContext *h, uint8_t *signature,
yading@11:                           const uint8_t *digest, int type);
yading@11: 
yading@11: /**
yading@11:  * Update the keystream and set RC4 keys for encryption.
yading@11:  *
yading@11:  * @param h an URLContext
yading@11:  * @return zero on success, negative value otherwise
yading@11:  */
yading@11: int ff_rtmpe_update_keystream(URLContext *h);
yading@11: 
yading@11: #endif /* AVFORMAT_RTMPCRYPT_H */