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a7d1d76579
In preparation for making the hash function common, we may as well use const where we can. Also the input length cannot be negative, but may be very large, so use unsigned. Signed-off-by: Simon Glass <sjg@chromium.org>
118 lines
3.1 KiB
C
118 lines
3.1 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, const unsigned char *input,
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unsigned 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(const unsigned char *input, unsigned int ilen,
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unsigned char *output);
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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(const unsigned char *input, unsigned int ilen,
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unsigned char *output, unsigned int chunk_sz);
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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(const unsigned char *key, int keylen,
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const unsigned char *input, unsigned int ilen,
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unsigned char *output);
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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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