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/**
* \file sha1.h
*
* Based on XySSL: Copyright (C) 2006-2008 Christophe Devine
*
* Copyright (C) 2009 Paul Bakker <polarssl_maintainer at polarssl dot org>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the names of PolarSSL or XySSL nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef POLARSSL_SHA1_H
#define POLARSSL_SHA1_H
/**
* \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 */
unsigned char ipad[64]; /*!< HMAC: inner padding */
unsigned char opad[64]; /*!< HMAC: outer padding */
}
sha1_context;
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief SHA-1 context setup
*
* \param ctx 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, unsigned char *input, 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( unsigned char *input, int ilen, unsigned char output[20] );
/**
* \brief Output = SHA-1( file contents )
*
* \param path input file name
* \param output SHA-1 checksum result
*
* \return 0 if successful, 1 if fopen failed,
* or 2 if fread failed
*/
int sha1_file( char *path, unsigned char output[20] );
/**
* \brief SHA-1 HMAC context setup
*
* \param ctx HMAC context to be initialized
* \param key HMAC secret key
* \param keylen length of the HMAC key
*/
void sha1_hmac_starts( sha1_context *ctx, unsigned char *key, int keylen );
/**
* \brief SHA-1 HMAC process buffer
*
* \param ctx HMAC context
* \param input buffer holding the data
* \param ilen length of the input data
*/
void sha1_hmac_update( sha1_context *ctx, unsigned char *input, int ilen );
/**
* \brief SHA-1 HMAC final digest
*
* \param ctx HMAC context
* \param output SHA-1 HMAC checksum result
*/
void sha1_hmac_finish( sha1_context *ctx, unsigned char output[20] );
/**
* \brief Output = HMAC-SHA-1( hmac key, input buffer )
*
* \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( unsigned char *key, int keylen,
unsigned char *input, int ilen,
unsigned char output[20] );
/**
* \brief Checkup routine
*
* \return 0 if successful, or 1 if the test failed
*/
int sha1_self_test( int verbose );
#ifdef __cplusplus
}
#endif
#endif /* sha1.h */
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