131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
/**
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* \file sha256.h
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*
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* \brief SHA-224 and SHA-256 cryptographic hash function
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#ifndef MBEDTLS_SHA256_H
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#define MBEDTLS_SHA256_H
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#include <stddef.h>
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#include <stdint.h>
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// Regular implementation
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//
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief SHA-256 context structure
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*/
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typedef struct
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{
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uint32_t total[2]; /*!< number of bytes processed */
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uint32_t state[8]; /*!< intermediate digest state */
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unsigned char buffer[64]; /*!< data block being processed */
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int is224; /*!< 0 => SHA-256, else SHA-224 */
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}
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mbedtls_sha256_context;
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/**
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* \brief Initialize SHA-256 context
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*
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* \param ctx SHA-256 context to be initialized
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*/
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void mbedtls_sha256_init( mbedtls_sha256_context *ctx );
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/**
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* \brief Clear SHA-256 context
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*
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* \param ctx SHA-256 context to be cleared
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*/
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void mbedtls_sha256_free( mbedtls_sha256_context *ctx );
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/**
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* \brief Clone (the state of) a SHA-256 context
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*
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* \param dst The destination context
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* \param src The context to be cloned
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*/
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void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
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const mbedtls_sha256_context *src );
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/**
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* \brief SHA-256 context setup
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*
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* \param ctx context to be initialized
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* \param is224 0 = use SHA256, 1 = use SHA224
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*/
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void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 );
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/**
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* \brief SHA-256 process buffer
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*
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* \param ctx SHA-256 context
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* \param input buffer holding the data
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* \param ilen length of the input data
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*/
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void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
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size_t ilen );
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/**
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* \brief SHA-256 final digest
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*
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* \param ctx SHA-256 context
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* \param output SHA-224/256 checksum result
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*/
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void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] );
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/* Internal use */
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void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] );
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#ifdef __cplusplus
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}
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \brief Output = SHA-256( input buffer )
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*
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* \param input buffer holding the data
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* \param ilen length of the input data
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* \param output SHA-224/256 checksum result
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* \param is224 0 = use SHA256, 1 = use SHA224
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*/
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void mbedtls_sha256( const unsigned char *input, size_t ilen,
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unsigned char output[32], int is224 );
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/**
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* \brief Checkup routine
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*
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* \return 0 if successful, or 1 if the test failed
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*/
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int mbedtls_sha256_self_test( int verbose );
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#ifdef __cplusplus
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}
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#endif
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#endif /* mbedtls_sha256.h */
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