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215b01bba8
Implement watchodg-aware variants of hash calculation functions: - crc32_wd() - md5_wd() - sha1_csum_wd() The above functions calculate the hash of the input buffer in chunks, triggering the watchdog after processing each chunk. The chunk size is given as a function call parameter. Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/**
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* \file sha1.h
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* based from http://xyssl.org/code/source/sha1/
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* FIPS-180-1 compliant SHA-1 implementation
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*
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* Copyright (C) 2003-2006 Christophe Devine
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License, version 2.1 as published by the Free Software Foundation.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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/*
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* The SHA-1 standard was published by NIST in 1993.
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*
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* http://www.itl.nist.gov/fipspubs/fip180-1.htm
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*/
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#ifndef _SHA1_H
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#define _SHA1_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SHA1_SUM_POS -0x20
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#define SHA1_SUM_LEN 20
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/**
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* \brief SHA-1 context structure
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*/
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typedef struct
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{
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unsigned long total[2]; /*!< number of bytes processed */
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unsigned long state[5]; /*!< intermediate digest state */
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unsigned char buffer[64]; /*!< data block being processed */
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}
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sha1_context;
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/**
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* \brief SHA-1 context setup
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*
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* \param ctx SHA-1 context to be initialized
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*/
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void sha1_starts( sha1_context *ctx );
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/**
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* \brief SHA-1 process buffer
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*
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* \param ctx SHA-1 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 sha1_update( sha1_context *ctx, unsigned char *input, int ilen );
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/**
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* \brief SHA-1 final digest
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*
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* \param ctx SHA-1 context
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* \param output SHA-1 checksum result
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*/
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void sha1_finish( sha1_context *ctx, unsigned char output[20] );
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/**
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* \brief Output = SHA-1( 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 SHA-1 checksum result
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*/
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void sha1_csum( unsigned char *input, int ilen,
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unsigned char output[20] );
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/**
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* \brief Output = SHA-1( input buffer ), with watchdog triggering
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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 SHA-1 checksum result
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* \param chunk_sz watchdog triggering period (in bytes of input processed)
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*/
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void sha1_csum_wd (unsigned char *input, int ilen,
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unsigned char output[20], unsigned int chunk_sz);
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/**
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* \brief Output = SHA-1( file contents )
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*
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* \param path input file name
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* \param output SHA-1 checksum result
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* \return 0 if successful, or 1 if fopen failed
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*/
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int sha1_file( char *path, unsigned char output[20] );
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/**
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* \brief Output = HMAC-SHA-1( input buffer, hmac key )
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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-SHA-1 result
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*/
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void sha1_hmac( unsigned char *key, int keylen,
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unsigned char *input, int ilen,
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unsigned char output[20] );
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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 sha1_self_test( void );
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#ifdef __cplusplus
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}
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#endif
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#endif /* sha1.h */
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