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Strongswan

    1: /*
    2:  * Copyright (C) 2010 Martin Willi
    3:  * Copyright (C) 2010 revosec AG
    4:  *
    5:  * This program is free software; you can redistribute it and/or modify it
    6:  * under the terms of the GNU General Public License as published by the
    7:  * Free Software Foundation; either version 2 of the License, or (at your
    8:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
    9:  *
   10:  * This program is distributed in the hope that it will be useful, but
   11:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   12:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   13:  * for more details.
   14:  */
   15: 
   16: /**
   17:  * @defgroup tls_prf tls_prf
   18:  * @{ @ingroup libtls
   19:  */
   20: 
   21: #ifndef TLS_PRF_H_
   22: #define TLS_PRF_H_
   23: 
   24: typedef struct tls_prf_t tls_prf_t;
   25: 
   26: #include <crypto/prfs/prf.h>
   27: 
   28: /**
   29:  * The PRF function specified on TLS, based on HMAC.
   30:  */
   31: struct tls_prf_t {
   32: 
   33: 	/**
   34: 	 * Set the key of the PRF function.
   35: 	 *
   36: 	 * @param key		key to set
   37: 	 * @return			TRUE if key set successfully
   38: 	 */
   39: 	bool (*set_key)(tls_prf_t *this, chunk_t key);
   40: 
   41: 	/**
   42: 	 * Generate a series of bytes using a label and a seed.
   43: 	 *
   44: 	 * @param label		ASCII input label
   45: 	 * @param seed		seed input value
   46: 	 * @param bytes		number of bytes to get
   47: 	 * @param out		buffer receiving bytes
   48: 	 * @return			TRUE if bytes generated successfully
   49: 	 */
   50: 	bool (*get_bytes)(tls_prf_t *this, char *label, chunk_t seed,
   51: 					  size_t bytes, char *out);
   52: 
   53: 	/**
   54: 	 * Destroy a tls_prf_t.
   55: 	 */
   56: 	void (*destroy)(tls_prf_t *this);
   57: };
   58: 
   59: /**
   60:  * Create a tls_prf instance with specific algorithm as in TLS 1.2.
   61:  *
   62:  * @param prf			underlying PRF function to use
   63:  * @return				TLS PRF algorithm
   64:  */
   65: tls_prf_t *tls_prf_create_12(pseudo_random_function_t prf);
   66: 
   67: /**
   68:  * Create a tls_prf instance with XOred SHA1/MD5 as in TLS 1.0/1.1.
   69:  *
   70:  * @return				TLS PRF algorithm
   71:  */
   72: tls_prf_t *tls_prf_create_10();
   73: 
   74: #endif /** TLS_PRF_H_ @}*/