94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/**
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* @file prf_plus.h
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*
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* @brief Interface for prf_plus.h.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#ifndef PRF_PLUS_H_
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#define PRF_PLUS_H_
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#include <transforms/prfs/prf.h>
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typedef struct prf_plus_t prf_plus_t;
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/**
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* @brief Implementation of the prf+ function described in IKEv2 draft.
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*
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* This class implements the prf+ algorithm. Internally it uses a pseudo random
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* function, which implements the prf_t interface.
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*
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* See IKEv2 draft 2.13.
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*
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* @b Constructors:
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* - prf_plus_create()
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*
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* @ingroup transforms
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*/
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struct prf_plus_t {
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/**
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* @brief Get pseudo random bytes.
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*
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* Get the next few bytes of the prf+ output. Space
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* must be allocated by the caller.
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*
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* @param this calling object
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* @param length number of bytes to get
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* @param[out] buffer pointer where the generated bytes will be written
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*/
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void (*get_bytes) (prf_plus_t *this, size_t length, u_int8_t *buffer);
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/**
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* @brief Allocate pseudo random bytes.
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*
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* Get the next few bytes of the prf+ output. This function
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* will allocate the required space.
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*
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* @param this calling object
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* @param length number of bytes to get
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* @param[out] chunk chunk which will hold generated bytes
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*/
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void (*allocate_bytes) (prf_plus_t *this, size_t length, chunk_t *chunk);
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/**
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* @brief Destroys a prf_plus_t object.
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*
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* @param this calling object
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*/
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void (*destroy) (prf_plus_t *this);
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};
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/**
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* @brief Creates a new prf_plus_t object.
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*
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* Seed will be cloned. prf will
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* not be cloned, must be destroyed outside after
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* prf_plus_t usage.
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*
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* @param prf prf object to use
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* @param seed input seed for prf
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* @return prf_plus_t object
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*
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* @ingroup transforms
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*/
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prf_plus_t *prf_plus_create(prf_t *prf, chunk_t seed);
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#endif /*PRF_PLUS_H_*/
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