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/**
* \file md4.h
*
* \brief MD4 message digest algorithm (hash function)
*
* Copyright (C) 2006-2010, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef POLARSSL_MD4_H
#define POLARSSL_MD4_H
#include <string.h>
#define POLARSSL_ERR_MD4_FILE_IO_ERROR -0x0072 /**< Read/write error in file. */
/**
* \brief MD4 context structure
*/
typedef struct
{
unsigned long total[2]; /*!< number of bytes processed */
unsigned long state[4]; /*!< intermediate digest state */
unsigned char buffer[64]; /*!< data block being processed */
unsigned char ipad[64]; /*!< HMAC: inner padding */
unsigned char opad[64]; /*!< HMAC: outer padding */
}
md4_context;
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief MD4 context setup
*
* \param ctx context to be initialized
*/
void md4_starts( md4_context *ctx );
/**
* \brief MD4 process buffer
*
* \param ctx MD4 context
* \param input buffer holding the data
* \param ilen length of the input data
*/
void md4_update( md4_context *ctx, const unsigned char *input, size_t ilen );
/**
* \brief MD4 final digest
*
* \param ctx MD4 context
* \param output MD4 checksum result
*/
void md4_finish( md4_context *ctx, unsigned char output[16] );
/**
* \brief Output = MD4( input buffer )
*
* \param input buffer holding the data
* \param ilen length of the input data
* \param output MD4 checksum result
*/
void md4( const unsigned char *input, size_t ilen, unsigned char output[16] );
/**
* \brief Output = MD4( file contents )
*
* \param path input file name
* \param output MD4 checksum result
*
* \return 0 if successful, or POLARSSL_ERR_MD4_FILE_IO_ERROR
*/
int md4_file( const char *path, unsigned char output[16] );
/**
* \brief MD4 HMAC context setup
*
* \param ctx HMAC context to be initialized
* \param key HMAC secret key
* \param keylen length of the HMAC key
*/
void md4_hmac_starts( md4_context *ctx, const unsigned char *key, size_t keylen );
/**
* \brief MD4 HMAC process buffer
*
* \param ctx HMAC context
* \param input buffer holding the data
* \param ilen length of the input data
*/
void md4_hmac_update( md4_context *ctx, const unsigned char *input, size_t ilen );
/**
* \brief MD4 HMAC final digest
*
* \param ctx HMAC context
* \param output MD4 HMAC checksum result
*/
void md4_hmac_finish( md4_context *ctx, unsigned char output[16] );
/**
* \brief MD4 HMAC context reset
*
* \param ctx HMAC context to be reset
*/
void md4_hmac_reset( md4_context *ctx );
/**
* \brief Output = HMAC-MD4( hmac key, input buffer )
*
* \param key HMAC secret key
* \param keylen length of the HMAC key
* \param input buffer holding the data
* \param ilen length of the input data
* \param output HMAC-MD4 result
*/
void md4_hmac( const unsigned char *key, size_t keylen,
const unsigned char *input, size_t ilen,
unsigned char output[16] );
/**
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed
*/
int md4_self_test( int verbose );
#ifdef __cplusplus
}
#endif
#endif /* md4.h */
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