1bd3ae826c
process functions Access to process functions is needed to reduce possible timing attacks on SSL MAC checks. As SSL is set to move to using the dynamic MD layer, the MD layer needs access to these process functions as well.
162 lines
4.3 KiB
C
162 lines
4.3 KiB
C
/**
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* \file md4.h
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*
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* \brief MD4 message digest algorithm (hash function)
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*
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* Copyright (C) 2006-2010, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef POLARSSL_MD4_H
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#define POLARSSL_MD4_H
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#include <string.h>
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#ifdef _MSC_VER
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#include <basetsd.h>
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typedef UINT32 uint32_t;
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#else
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#include <inttypes.h>
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#endif
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#define POLARSSL_ERR_MD4_FILE_IO_ERROR -0x0072 /**< Read/write error in file. */
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/**
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* \brief MD4 context structure
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*/
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typedef struct
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{
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uint32_t total[2]; /*!< number of bytes processed */
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uint32_t state[4]; /*!< intermediate digest state */
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unsigned char buffer[64]; /*!< data block being processed */
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unsigned char ipad[64]; /*!< HMAC: inner padding */
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unsigned char opad[64]; /*!< HMAC: outer padding */
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}
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md4_context;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief MD4 context setup
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*
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* \param ctx context to be initialized
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*/
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void md4_starts( md4_context *ctx );
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/**
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* \brief MD4 process buffer
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*
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* \param ctx MD4 context
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* \param input buffer holding the data
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* \param ilen length of the input data
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*/
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void md4_update( md4_context *ctx, const unsigned char *input, size_t ilen );
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/**
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* \brief MD4 final digest
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*
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* \param ctx MD4 context
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* \param output MD4 checksum result
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*/
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void md4_finish( md4_context *ctx, unsigned char output[16] );
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/**
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* \brief Output = MD4( input buffer )
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*
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* \param input buffer holding the data
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* \param ilen length of the input data
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* \param output MD4 checksum result
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*/
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void md4( const unsigned char *input, size_t ilen, unsigned char output[16] );
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/**
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* \brief Output = MD4( file contents )
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*
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* \param path input file name
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* \param output MD4 checksum result
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*
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* \return 0 if successful, or POLARSSL_ERR_MD4_FILE_IO_ERROR
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*/
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int md4_file( const char *path, unsigned char output[16] );
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/**
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* \brief MD4 HMAC context setup
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*
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* \param ctx HMAC context to be initialized
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* \param key HMAC secret key
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* \param keylen length of the HMAC key
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*/
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void md4_hmac_starts( md4_context *ctx, const unsigned char *key, size_t keylen );
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/**
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* \brief MD4 HMAC process buffer
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*
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* \param ctx HMAC context
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* \param input buffer holding the data
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* \param ilen length of the input data
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*/
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void md4_hmac_update( md4_context *ctx, const unsigned char *input, size_t ilen );
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/**
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* \brief MD4 HMAC final digest
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*
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* \param ctx HMAC context
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* \param output MD4 HMAC checksum result
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*/
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void md4_hmac_finish( md4_context *ctx, unsigned char output[16] );
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/**
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* \brief MD4 HMAC context reset
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*
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* \param ctx HMAC context to be reset
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*/
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void md4_hmac_reset( md4_context *ctx );
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/**
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* \brief Output = HMAC-MD4( hmac key, input buffer )
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*
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* \param key HMAC secret key
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* \param keylen length of the HMAC key
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* \param input buffer holding the data
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* \param ilen length of the input data
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* \param output HMAC-MD4 result
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*/
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void md4_hmac( const unsigned char *key, size_t keylen,
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const unsigned char *input, size_t ilen,
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unsigned char output[16] );
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int md4_self_test( int verbose );
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/* Internal use */
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void md4_process( md4_context *ctx, const unsigned char data[64] );
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#ifdef __cplusplus
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}
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#endif
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#endif /* md4.h */
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