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/**
* \file sha1.h
* based from http://xyssl.org/code/source/sha1/
* FIPS-180-1 compliant SHA-1 implementation
*
* Copyright (C) 2003-2006 Christophe Devine
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License, version 2.1 as published by the Free Software Foundation.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
/*
* The SHA-1 standard was published by NIST in 1993.
*
* http://www.itl.nist.gov/fipspubs/fip180-1.htm
*/
#ifndef _SHA1_H
#define _SHA1_H
#ifdef __cplusplus
extern "C" {
#endif
#define SHA1_SUM_POS -0x20
#define SHA1_SUM_LEN 20
/**
* \brief SHA-1 context structure
*/
typedef struct
{
unsigned long total[2]; /*!< number of bytes processed */
unsigned long state[5]; /*!< intermediate digest state */
unsigned char buffer[64]; /*!< data block being processed */
}
sha1_context;
/**
* \brief SHA-1 context setup
*
* \param ctx SHA-1 context to be initialized
*/
void sha1_starts( sha1_context *ctx );
/**
* \brief SHA-1 process buffer
*
* \param ctx SHA-1 context
* \param input buffer holding the data
* \param ilen length of the input data
*/
void sha1_update(sha1_context *ctx, const unsigned char *input,
unsigned int ilen);
/**
* \brief SHA-1 final digest
*
* \param ctx SHA-1 context
* \param output SHA-1 checksum result
*/
void sha1_finish( sha1_context *ctx, unsigned char output[20] );
/**
* \brief Output = SHA-1( input buffer )
*
* \param input buffer holding the data
* \param ilen length of the input data
* \param output SHA-1 checksum result
*/
void sha1_csum(const unsigned char *input, unsigned int ilen,
unsigned char *output);
/**
* \brief Output = SHA-1( input buffer ), with watchdog triggering
*
* \param input buffer holding the data
* \param ilen length of the input data
* \param output SHA-1 checksum result
* \param chunk_sz watchdog triggering period (in bytes of input processed)
*/
void sha1_csum_wd(const unsigned char *input, unsigned int ilen,
unsigned char *output, unsigned int chunk_sz);
/**
* \brief Output = HMAC-SHA-1( input buffer, hmac key )
*
* \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-SHA-1 result
*/
void sha1_hmac(const unsigned char *key, int keylen,
const unsigned char *input, unsigned int ilen,
unsigned char *output);
/**
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed
*/
int sha1_self_test( void );
#ifdef __cplusplus
}
#endif
#endif /* sha1.h */
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