mirror of https://github.com/ARMmbed/mbed-os.git
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
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* sha256_alt.h
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*
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* Copyright (C) 2018, 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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*/
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#ifndef __SHA256_ALT__
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#define __SHA256_ALT__
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#if defined(MBEDTLS_SHA256_ALT)
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#include "crys_hash.h"
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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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CRYS_HASHUserContext_t crys_hash_ctx;
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} mbedtls_sha256_context;
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/**
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* \brief This function initializes a SHA-256 context.
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*
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* \param ctx The SHA-256 context to initialize.
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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 This function clears a SHA-256 context.
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*
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* \param ctx The SHA-256 context to clear.
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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 This function clones 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 clone.
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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 This function starts a SHA-224 or SHA-256 checksum
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* calculation.
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*
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* \param ctx The context to initialize.
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* \param is224 Determines which function to use.
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* <ul><li>0: Use SHA-256.</li>
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* <li>1: Use SHA-224.</li></ul>
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*
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* \return \c 0 on success.
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*/
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int mbedtls_sha256_starts_ret( mbedtls_sha256_context *ctx, int is224 );
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/**
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* \brief This function feeds an input buffer into an ongoing
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* SHA-256 checksum calculation.
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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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* \return \c 0 on success.
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*/
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int mbedtls_sha256_update_ret( mbedtls_sha256_context *ctx,
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const unsigned char *input,
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size_t ilen );
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/**
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* \brief This function finishes the SHA-256 operation, and writes
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* the result to the output buffer.
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*
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* \param ctx The SHA-256 context.
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* \param output The SHA-224 or SHA-256 checksum result.
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*
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* \return \c 0 on success.
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*/
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int mbedtls_sha256_finish_ret( mbedtls_sha256_context *ctx,
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unsigned char output[32] );
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/**
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* \brief This function processes a single data block within
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* the ongoing SHA-256 computation. This function is for
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* internal use only.
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*
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* \param ctx The SHA-256 context.
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* \param data The buffer holding one block of data.
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*
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* \return \c 0 on success.
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*/
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int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
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const unsigned char data[64] );
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#ifdef __cplusplus
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}
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#endif
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#endif // MBEDTLS_SHA256_ALT__
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#endif //__SHA256_ALT__
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