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/*
* Copyright (C) 2010 Martin Willi
* Copyright (C) 2010 revosec AG
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
/**
* @defgroup tls_prf tls_prf
* @{ @ingroup libtls
*/
#ifndef TLS_PRF_H_
#define TLS_PRF_H_
typedef struct tls_prf_t tls_prf_t;
#include <crypto/prfs/prf.h>
/**
* The PRF function specified on TLS, based on HMAC.
*/
struct tls_prf_t {
/**
* Set the key of the PRF function.
*
* @param key key to set
* @return TRUE if key set successfully
*/
bool (*set_key)(tls_prf_t *this, chunk_t key);
/**
* Generate a series of bytes using a label and a seed.
*
* @param label ASCII input label
* @param seed seed input value
* @param bytes number of bytes to get
* @param out buffer receiving bytes
* @return TRUE if bytes generated successfully
*/
bool (*get_bytes)(tls_prf_t *this, char *label, chunk_t seed,
size_t bytes, char *out);
/**
* Destroy a tls_prf_t.
*/
void (*destroy)(tls_prf_t *this);
};
/**
* Create a tls_prf instance with specific algorithm as in TLS 1.2.
*
* @param prf underlying PRF function to use
* @return TLS PRF algorithm
*/
tls_prf_t *tls_prf_create_12(pseudo_random_function_t prf);
/**
* Create a tls_prf instance with XOred SHA1/MD5 as in TLS 1.0/1.1.
*
* @return TLS PRF algorithm
*/
tls_prf_t *tls_prf_create_10();
#endif /** TLS_PRF_H_ @}*/
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