sha256.h File Reference

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

#include "config.h"
#include <stddef.h>
#include <stdint.h>

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

Functions
void	mbedtls_sha256_init (mbedtls_sha256_context *ctx)
	Initialize SHA-256 context. More...
void	mbedtls_sha256_free (mbedtls_sha256_context *ctx)
	Clear SHA-256 context. More...
void	mbedtls_sha256_clone (mbedtls_sha256_context *dst, const mbedtls_sha256_context *src)
	Clone (the state of) a SHA-256 context. More...
void	mbedtls_sha256_starts (mbedtls_sha256_context *ctx, int is224)
	SHA-256 context setup. More...
void	mbedtls_sha256_update (mbedtls_sha256_context *ctx, const unsigned char *input, size_t ilen)
	SHA-256 process buffer. More...
void	mbedtls_sha256_finish (mbedtls_sha256_context *ctx, unsigned char output[32])
	SHA-256 final digest. More...
void	mbedtls_sha256_process (mbedtls_sha256_context *ctx, const unsigned char data[64])
void	mbedtls_sha256 (const unsigned char *input, size_t ilen, unsigned char output[32], int is224)
	Output = SHA-256( input buffer ) More...
int	mbedtls_sha256_self_test (int verbose)
	Checkup routine. More...

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)

Function Documentation

mbedtls_sha256()

void mbedtls_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

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mbedtls_sha256_clone()

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

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

Parameters

dst	The destination context
src	The context to be cloned

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mbedtls_sha256_finish()

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

SHA-256 final digest.

Parameters

ctx	SHA-256 context
output	SHA-224/256 checksum result

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mbedtls_sha256_free()

void mbedtls_sha256_free

(

mbedtls_sha256_context *

ctx

)

Clear SHA-256 context.

Parameters

ctx	SHA-256 context to be cleared

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mbedtls_sha256_init()

void mbedtls_sha256_init

(

mbedtls_sha256_context *

ctx

)

Initialize SHA-256 context.

Parameters

ctx	SHA-256 context to be initialized

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mbedtls_sha256_process()

void mbedtls_sha256_process	(	mbedtls_sha256_context *	ctx,
		const unsigned char	data[64]
	)

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mbedtls_sha256_self_test()

int mbedtls_sha256_self_test

(

int

verbose

)

Checkup routine.

Returns

0 if successful, or 1 if the test failed

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mbedtls_sha256_starts()

void mbedtls_sha256_starts	(	mbedtls_sha256_context *	ctx,
		int	is224
	)

SHA-256 context setup.

Parameters

ctx	context to be initialized
is224	0 = use SHA256, 1 = use SHA224

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mbedtls_sha256_update()

void mbedtls_sha256_update	(	mbedtls_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

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