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sha256.h File Reference
Data Structures | Functions

sha256.h File Reference

SHA-224 and SHA-256 cryptographic hash function. More...

Go to the source code of this file.

Data Structures

struct  mbedtls_sha256_context
 SHA-256 context structure. More...

Functions

void mbedtls_sha256_init (mbedtls_sha256_context *ctx)
 Initialize SHA-256 context.
void mbedtls_sha256_free (mbedtls_sha256_context *ctx)
 Clear SHA-256 context.
void mbedtls_sha256_clone (mbedtls_sha256_context *dst, const mbedtls_sha256_context *src)
 Clone (the state of) a SHA-256 context.
void mbedtls_sha256_starts (mbedtls_sha256_context *ctx, int is224)
 SHA-256 context setup.
void mbedtls_sha256_update (mbedtls_sha256_context *ctx, const unsigned char *input, size_t ilen)
 SHA-256 process buffer.
void mbedtls_sha256_finish (mbedtls_sha256_context *ctx, unsigned char output[32])
 SHA-256 final digest.
void mbedtls_sha256 (const unsigned char *input, size_t ilen, unsigned char output[32], int is224)
 Output = SHA-256( input buffer )
int mbedtls_sha256_self_test (int verbose)
 Checkup routine.

Detailed Description

SHA-224 and SHA-256 cryptographic hash function.

Copyright (C) 2006-2015, ARM Limited, All Rights Reserved SPDX-License-Identifier: Apache-2.0

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This file is part of mbed TLS (https://tls.mbed.org)

Definition in file sha256.h.

Function Documentation

void mbedtls_sha256 ( const unsigned char *  input,
size_t  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

Definition at line 326 of file sha256.c.

void mbedtls_sha256_clone ( mbedtls_sha256_context *  dst,
const mbedtls_sha256_context *  src 
)

Clone (the state of) a SHA-256 context.

Parameters:
dstThe destination context
srcThe context to be cloned

Definition at line 94 of file sha256.c.

void mbedtls_sha256_finish ( mbedtls_sha256_context *  ctx,
unsigned char  output[32] 
)

SHA-256 final digest.

Parameters:
ctxSHA-256 context
outputSHA-224/256 checksum result

SHA-256 final digest.

Parameters:
ctxThe SHA-256 context.
outputThe SHA-224or SHA-256 checksum result.

SHA-256 final digest.

Parameters:
ctxThe SHA-256 context.
outputThe SHA-224or SHA-256 checksum result.

Definition at line 290 of file sha256.c.

void mbedtls_sha256_free ( mbedtls_sha256_context *  ctx )

Clear SHA-256 context.

Parameters:
ctxSHA-256 context to be cleared

Definition at line 86 of file sha256.c.

void mbedtls_sha256_init ( mbedtls_sha256_context *  ctx )

Initialize SHA-256 context.

Parameters:
ctxSHA-256 context to be initialized

Definition at line 81 of file sha256.c.

int mbedtls_sha256_self_test ( int  verbose )

Checkup routine.

Returns:
0 if successful, or 1 if the test failed

Definition at line 392 of file sha256.c.

void mbedtls_sha256_starts ( mbedtls_sha256_context *  ctx,
int  is224 
)

SHA-256 context setup.

Parameters:
ctxcontext to be initialized
is2240 = use SHA256, 1 = use SHA224

SHA-256 context setup.

Parameters:
ctxThe SHA-256 context to initialize.
is224Determines which function to use.

  • 0: Use SHA-256.
  • 1: Use SHA-224.

SHA-256 context setup.

Parameters:
ctxThe SHA-256 context to initialize.
is224Determines which function to use.

  • 0: Use SHA-256.
  • 1: Use SHA-224.

Definition at line 103 of file sha256.c.

void mbedtls_sha256_update ( mbedtls_sha256_context *  ctx,
const unsigned char *  input,
size_t  ilen 
)

SHA-256 process buffer.

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

SHA-256 process buffer.

Parameters:
ctxThe SHA-256 context to initialize.
inputThe buffer holding the data.
ilenThe length of the input data.

SHA-256 process buffer.

Parameters:
ctxThe SHA-256 context to initialize.
inputThe buffer holding the data.
ilenThe length of the input data.

Definition at line 241 of file sha256.c.

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