Atmel Software Framework

sha2.h File Reference

Copyright (C) 2006-2010, Brainspark B.V.

This file is part of PolarSSL (http://www.polarssl.org) Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>

All rights reserved.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Data Structures

struct  sha2_context
 SHA-256 context structure. More...
 

Functions

void sha2 (const unsigned char *input, int ilen, unsigned char output[32], int is224)
 Output = SHA-256( input buffer ) More...
 
int sha2_file (const char *path, unsigned char output[32], int is224)
 Output = SHA-256( file contents ) More...
 
void sha2_finish (sha2_context *ctx, unsigned char output[32])
 SHA-256 final digest. More...
 
void sha2_hmac (const unsigned char *key, int keylen, const unsigned char *input, int ilen, unsigned char output[32], int is224)
 Output = HMAC-SHA-256( hmac key, input buffer ) More...
 
void sha2_hmac_finish (sha2_context *ctx, unsigned char output[32])
 SHA-256 HMAC final digest. More...
 
void sha2_hmac_reset (sha2_context *ctx)
 SHA-256 HMAC context reset. More...
 
void sha2_hmac_starts (sha2_context *ctx, const unsigned char *key, int keylen, int is224)
 SHA-256 HMAC context setup. More...
 
void sha2_hmac_update (sha2_context *ctx, const unsigned char *input, int ilen)
 SHA-256 HMAC process buffer. More...
 
int sha2_self_test (int verbose)
 Checkup routine. More...
 
void sha2_starts (sha2_context *ctx, int is224)
 SHA-256 context setup. More...
 
void sha2_update (sha2_context *ctx, const unsigned char *input, int ilen)
 SHA-256 process buffer. More...
 

void sha2 ( const unsigned char *  input,
int  ilen,
unsigned char  output[32],
int  is224 
)

Output = SHA-256( input buffer )

Parameters
inputbuffer holding the data
ilenlength of the input data
outputSHA-224/256 checksum result
is2240 = use SHA256, 1 = use SHA224

Referenced by main().

int sha2_file ( const char *  path,
unsigned char  output[32],
int  is224 
)

Output = SHA-256( file contents )

Parameters
pathinput file name
outputSHA-224/256 checksum result
is2240 = use SHA256, 1 = use SHA224
Returns
0 if successful, 1 if fopen failed, or 2 if fread failed
void sha2_finish ( sha2_context ctx,
unsigned char  output[32] 
)

SHA-256 final digest.

Parameters
ctxSHA-256 context
outputSHA-224/256 checksum result
void sha2_hmac ( const unsigned char *  key,
int  keylen,
const unsigned char *  input,
int  ilen,
unsigned char  output[32],
int  is224 
)

Output = HMAC-SHA-256( hmac key, input buffer )

Parameters
keyHMAC secret key
keylenlength of the HMAC key
inputbuffer holding the data
ilenlength of the input data
outputHMAC-SHA-224/256 result
is2240 = use SHA256, 1 = use SHA224
void sha2_hmac_finish ( sha2_context ctx,
unsigned char  output[32] 
)

SHA-256 HMAC final digest.

Parameters
ctxHMAC context
outputSHA-224/256 HMAC checksum result
void sha2_hmac_reset ( sha2_context ctx)

SHA-256 HMAC context reset.

Parameters
ctxHMAC context to be reset
void sha2_hmac_starts ( sha2_context ctx,
const unsigned char *  key,
int  keylen,
int  is224 
)

SHA-256 HMAC context setup.

Parameters
ctxHMAC context to be initialized
keyHMAC secret key
keylenlength of the HMAC key
is2240 = use SHA256, 1 = use SHA224
void sha2_hmac_update ( sha2_context ctx,
const unsigned char *  input,
int  ilen 
)

SHA-256 HMAC process buffer.

Parameters
ctxHMAC context
inputbuffer holding the data
ilenlength of the input data
int sha2_self_test ( int  verbose)

Checkup routine.

Returns
0 if successful, or 1 if the test failed

Referenced by main().

void sha2_starts ( sha2_context ctx,
int  is224 
)

SHA-256 context setup.

Parameters
ctxcontext to be initialized
is2240 = use SHA256, 1 = use SHA224
void sha2_update ( sha2_context ctx,
const unsigned char *  input,
int  ilen 
)

SHA-256 process buffer.

Parameters
ctxSHA-256 context
inputbuffer holding the data
ilenlength of the input data