146 lines
4.9 KiB
C
146 lines
4.9 KiB
C
/**
|
|
* \file sha256.h
|
|
*
|
|
* \brief This file contains SHA-224 and SHA-256 definitions and functions.
|
|
*
|
|
* The Secure Hash Algorithms 224 and 256 (SHA-224 and SHA-256) cryptographic
|
|
* hash functions are defined in <em>FIPS 180-4: Secure Hash Standard (SHS)</em>.
|
|
*/
|
|
/*
|
|
* Copyright (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved
|
|
* Copyright (C) 2018, Intel Corporation, 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)
|
|
*/
|
|
#ifndef MBEDTLS_SHA256_H
|
|
#define MBEDTLS_SHA256_H
|
|
|
|
#include <types.h>
|
|
|
|
/**
|
|
* \brief The SHA-256 context structure.
|
|
*
|
|
* The structure is used both for SHA-256 and for SHA-224
|
|
* checksum calculations. The choice between these two is
|
|
* made in the call to mbedtls_sha256_starts_ret().
|
|
*/
|
|
typedef struct
|
|
{
|
|
uint32_t total[2]; /*!< The number of Bytes processed. */
|
|
uint32_t state[8]; /*!< The intermediate digest state. */
|
|
uint8_t buffer[64]; /*!< The data block being processed. */
|
|
int32_t is224; /*!< Determines which function to use:
|
|
0: Use SHA-256, or 1: Use SHA-224. */
|
|
}
|
|
mbedtls_sha256_context;
|
|
|
|
/**
|
|
* \brief This function initializes a SHA-256 context.
|
|
*
|
|
* \param ctx The SHA-256 context to initialize.
|
|
*/
|
|
void mbedtls_sha256_init( mbedtls_sha256_context *ctx );
|
|
|
|
/**
|
|
* \brief This function clears a SHA-256 context.
|
|
*
|
|
* \param ctx The SHA-256 context to clear.
|
|
*/
|
|
void mbedtls_sha256_free( mbedtls_sha256_context *ctx );
|
|
|
|
/**
|
|
* \brief This function clones the state of a SHA-256 context.
|
|
*
|
|
* \param dst The destination context.
|
|
* \param src The context to clone.
|
|
*/
|
|
void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
|
|
const mbedtls_sha256_context *src );
|
|
|
|
/**
|
|
* \brief This function starts a SHA-224 or SHA-256 checksum
|
|
* calculation.
|
|
*
|
|
* \param ctx The context to initialize.
|
|
* \param is224 Determines which function to use:
|
|
* 0: Use SHA-256, or 1: Use SHA-224.
|
|
*
|
|
* \return \c 0 on success.
|
|
*/
|
|
int32_t mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int32_t is224 );
|
|
|
|
/**
|
|
* \brief This function feeds an input buffer into an ongoing
|
|
* SHA-256 checksum calculation.
|
|
*
|
|
* \param ctx The SHA-256 context.
|
|
* \param input The buffer holding the data.
|
|
* \param ilen The length of the input data.
|
|
*
|
|
* \return \c 0 on success.
|
|
*/
|
|
int32_t mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx,
|
|
const uint8_t *input,
|
|
size_t ilen );
|
|
|
|
/**
|
|
* \brief This function finishes the SHA-256 operation, and writes
|
|
* the result to the output buffer.
|
|
*
|
|
* \param ctx The SHA-256 context.
|
|
* \param output The SHA-224 or SHA-256 checksum result.
|
|
*
|
|
* \return \c 0 on success.
|
|
*/
|
|
int32_t mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
|
|
uint8_t output[32] );
|
|
|
|
/**
|
|
* \brief This function processes a single data block within
|
|
* the ongoing SHA-256 computation. This function is for
|
|
* internal use only.
|
|
*
|
|
* \param ctx The SHA-256 context.
|
|
* \param data The buffer holding one block of data.
|
|
*
|
|
* \return \c 0 on success.
|
|
*/
|
|
int32_t mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
|
|
const uint8_t data[64] );
|
|
|
|
/**
|
|
* \brief This function calculates the SHA-224 or SHA-256
|
|
* checksum of a buffer.
|
|
*
|
|
* The function allocates the context, performs the
|
|
* calculation, and frees the context.
|
|
*
|
|
* The SHA-256 result is calculated as
|
|
* output = SHA-256(input buffer).
|
|
*
|
|
* \param input The buffer holding the input data.
|
|
* \param ilen The length of the input data.
|
|
* \param output The SHA-224 or SHA-256 checksum result.
|
|
* \param is224 Determines which function to use:
|
|
* 0: Use SHA-256, or 1: Use SHA-224.
|
|
*/
|
|
int32_t mbedtls_sha256_ret( const uint8_t *input,
|
|
size_t ilen,
|
|
uint8_t output[32],
|
|
int32_t is224 );
|
|
|
|
#endif /* mbedtls_sha256.h */
|