mbed TLS library
Dependents:
HTTPClient-SSL
WS_SERVER
« Back to documentation index
sha256.h File Reference
SHA-224 and SHA-256 cryptographic hash function.
More...
Go to the source code of this file.
Data Structures
struct sha256_context
SHA-256 context structure. More...
Functions
void sha256_init (sha256_context *ctx)
Initialize SHA-256 context.
void sha256_free (sha256_context *ctx)
Clear SHA-256 context.
void sha256_starts (sha256_context *ctx, int is224)
SHA-256 context setup.
void sha256_update (sha256_context *ctx, const unsigned char *input, size_t ilen)
SHA-256 process buffer.
void sha256_finish (sha256_context *ctx, unsigned char output[32])
SHA-256 final digest.
void sha256 (const unsigned char *input, size_t ilen, unsigned char output[32], int is224)
Output = SHA-256( input buffer )
int sha256_file (const char *path, unsigned char output[32], int is224)
Output = SHA-256( file contents )
void sha256_hmac_starts (sha256_context *ctx, const unsigned char *key, size_t keylen, int is224)
SHA-256 HMAC context setup.
void sha256_hmac_update (sha256_context *ctx, const unsigned char *input, size_t ilen)
SHA-256 HMAC process buffer.
void sha256_hmac_finish (sha256_context *ctx, unsigned char output[32])
SHA-256 HMAC final digest.
void sha256_hmac_reset (sha256_context *ctx)
SHA-256 HMAC context reset.
void sha256_hmac (const unsigned char *key, size_t keylen, const unsigned char *input, size_t ilen, unsigned char output[32], int is224)
Output = HMAC-SHA-256( hmac key, input buffer )
int sha256_self_test (int verbose)
Checkup routine.
Detailed Description
SHA-224 and SHA-256 cryptographic hash function.
Copyright (C) 2006-2014, ARM Limited, All Rights Reserved
This file is part of mbed TLS (https://tls.mbed.org )
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.
Definition in file sha256.h .
Function Documentation
void sha256
(
const unsigned char *
input ,
size_t
ilen ,
unsigned char
output [32],
int
is224
)
Output = SHA-256( input buffer )
Parameters:
input buffer holding the data
ilen length of the input data
output SHA-224/256 checksum result
is224 0 = use SHA256, 1 = use SHA224
Definition at line 351 of file sha256.c .
int sha256_file
(
const char *
path ,
unsigned char
output [32],
int
is224
)
Output = SHA-256( file contents )
Parameters:
path input file name
output SHA-224/256 checksum result
is224 0 = use SHA256, 1 = use SHA224
Returns: 0 if successful, or POLARSSL_ERR_SHA256_FILE_IO_ERROR
Definition at line 367 of file sha256.c .
SHA-256 final digest.
Parameters:
ctx SHA-256 context
output SHA-224/256 checksum result
Definition at line 315 of file sha256.c .
Clear SHA-256 context.
Parameters:
ctx SHA-256 context to be cleared
Definition at line 88 of file sha256.c .
void sha256_hmac
(
const unsigned char *
key ,
size_t
keylen ,
const unsigned char *
input ,
size_t
ilen ,
unsigned char
output [32],
int
is224
)
Output = HMAC-SHA-256( hmac key, input buffer )
Parameters:
key HMAC secret key
keylen length of the HMAC key
input buffer holding the data
ilen length of the input data
output HMAC-SHA-224/256 result
is224 0 = use SHA256, 1 = use SHA224
Definition at line 469 of file sha256.c .
void sha256_hmac_finish
(
sha256_context *
ctx ,
unsigned char
output [32]
)
SHA-256 HMAC final digest.
Parameters:
ctx HMAC context
output SHA-224/256 HMAC checksum result
Definition at line 440 of file sha256.c .
SHA-256 HMAC context reset.
Parameters:
ctx HMAC context to be reset
Definition at line 460 of file sha256.c .
void sha256_hmac_starts
(
sha256_context *
ctx ,
const unsigned char *
key ,
size_t
keylen ,
int
is224
)
SHA-256 HMAC context setup.
Parameters:
ctx HMAC context to be initialized
key HMAC secret key
keylen length of the HMAC key
is224 0 = use SHA256, 1 = use SHA224
Definition at line 400 of file sha256.c .
void sha256_hmac_update
(
sha256_context *
ctx ,
const unsigned char *
input ,
size_t
ilen
)
SHA-256 HMAC process buffer.
Parameters:
ctx HMAC context
input buffer holding the data
ilen length of the input data
Definition at line 431 of file sha256.c .
Initialize SHA-256 context.
Parameters:
ctx SHA-256 context to be initialized
Definition at line 83 of file sha256.c .
int sha256_self_test
(
int
verbose )
Checkup routine.
Returns: 0 if successful, or 1 if the test failed
Definition at line 648 of file sha256.c .
SHA-256 context setup.
Parameters:
ctx context to be initialized
is224 0 = use SHA256, 1 = use SHA224
Definition at line 99 of file sha256.c .
void sha256_update
(
sha256_context *
ctx ,
const unsigned char *
input ,
size_t
ilen
)
SHA-256 process buffer.
Parameters:
ctx SHA-256 context
input buffer holding the data
ilen length of the input data
Definition at line 266 of file sha256.c .