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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.
157 lines
4.2 KiB
C
157 lines
4.2 KiB
C
/**
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* \file md2.h
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*
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* \brief MD2 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_MD2_H
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#define POLARSSL_MD2_H
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#include <string.h>
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#define POLARSSL_ERR_MD2_FILE_IO_ERROR -0x0070 /**< Read/write error in file. */
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/**
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* \brief MD2 context structure
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*/
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typedef struct
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{
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unsigned char cksum[16]; /*!< checksum of the data block */
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unsigned char state[48]; /*!< intermediate digest state */
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unsigned char buffer[16]; /*!< data block being processed */
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unsigned char ipad[16]; /*!< HMAC: inner padding */
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unsigned char opad[16]; /*!< HMAC: outer padding */
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size_t left; /*!< amount of data in buffer */
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}
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md2_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 MD2 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 md2_starts( md2_context *ctx );
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/**
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* \brief MD2 process buffer
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*
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* \param ctx MD2 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 md2_update( md2_context *ctx, const unsigned char *input, size_t ilen );
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/**
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* \brief MD2 final digest
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*
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* \param ctx MD2 context
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* \param output MD2 checksum result
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*/
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void md2_finish( md2_context *ctx, unsigned char output[16] );
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/**
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* \brief Output = MD2( 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 MD2 checksum result
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*/
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void md2( const unsigned char *input, size_t ilen, unsigned char output[16] );
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/**
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* \brief Output = MD2( file contents )
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*
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* \param path input file name
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* \param output MD2 checksum result
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*
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* \return 0 if successful, or POLARSSL_ERR_MD2_FILE_IO_ERROR
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*/
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int md2_file( const char *path, unsigned char output[16] );
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/**
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* \brief MD2 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 md2_hmac_starts( md2_context *ctx, const unsigned char *key, size_t keylen );
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/**
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* \brief MD2 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 md2_hmac_update( md2_context *ctx, const unsigned char *input, size_t ilen );
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/**
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* \brief MD2 HMAC final digest
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*
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* \param ctx HMAC context
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* \param output MD2 HMAC checksum result
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*/
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void md2_hmac_finish( md2_context *ctx, unsigned char output[16] );
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/**
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* \brief MD2 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 md2_hmac_reset( md2_context *ctx );
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/**
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* \brief Output = HMAC-MD2( 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-MD2 result
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*/
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void md2_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 md2_self_test( int verbose );
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/* Internal use */
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void md2_process( md2_context *ctx );
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#ifdef __cplusplus
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}
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#endif
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#endif /* md2.h */
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