/* mbed Microcontroller Library
* Copyright (c) 2006-2020 ARM Limited
*
* 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.
*/
/****************************************************************************
*
* Copyright 2020 Samsung Electronics 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.
*
****************************************************************************/
#ifndef MBEDTLS_SHA256_ALT_H
#define MBEDTLS_SHA256_ALT_H
#include "mbedtls/sha256.h"
#if defined(MBEDTLS_SHA256_ALT)
#include "sss_common.h"
#ifdef __cplusplus
extern "C" {
#endif
#define ST_SHA256_BUF_SIZE ((size_t) 256)
struct mbedtls_sha256_context_s;
/**
* \brief SHA-256 context structure
*/
typedef struct mbedtls_sha256_context_s {
/* for S/W SHA-224 */
uint32_t total[2]; /*!< The number of Bytes processed. */
uint32_t state[8]; /*!< The intermediate digest state. */
unsigned char buffer[64]; /*!< The data block being processed. */
int is224; /*!< Determines which function to use:
0: Use SHA-256, or 1: Use SHA-224. */
/* for H/W SHA-256 */
uint32_t totals;
uint32_t hw;
unsigned char sbuf[ST_SHA256_BUF_SIZE]; /*!< ST_SHA256_BLOCK_SIZE buffer to store values so that algorithm is called once the buffer is filled */
stOCTET_STRING pstMessage;
stOCTET_STRING pstDigest;
}
mbedtls_sha256_context;
/**
* \brief Initialize SHA-256 context
*
* \param ctx SHA-256 context to be initialized
*/
void mbedtls_sha256_init(mbedtls_sha256_context *ctx);
/**
* \brief Clear SHA-256 context
*
* \param ctx SHA-256 context to be cleared
*/
void mbedtls_sha256_free(mbedtls_sha256_context *ctx);
/**
* \brief Clone (the state of) a SHA-256 context
*
* \param dst The destination context
* \param src The context to be cloned
*/
void mbedtls_sha256_clone(mbedtls_sha256_context *dst,
const mbedtls_sha256_context *src);
/**
* \brief SHA-256 context setup
*
* \param ctx context to be initialized
* \param is224 0 = use SHA256, 1 = use SHA224
*
* \returns error code
*/
int mbedtls_sha256_starts_ret(mbedtls_sha256_context *ctx, int is224);
/**
* \brief SHA-256 process buffer
*
* \param ctx SHA-256 context
* \param input buffer holding the data
* \param ilen length of the input data
*
* \returns error code
*/
int mbedtls_sha256_update_ret(mbedtls_sha256_context *ctx, const unsigned char *input,
size_t ilen);
/**
* \brief SHA-256 final digest
*
* \param ctx SHA-256 context
* \param output SHA-224/256 checksum result
*
* \returns error code
*/
int mbedtls_sha256_finish_ret(mbedtls_sha256_context *ctx, unsigned char output[32]);
/* Internal use */
int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx, const unsigned char data[64]);
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
* \brief This function starts a SHA-256 checksum calculation.
*
* \deprecated Superseded by mbedtls_sha256_starts_ret() in 2.7.0.
*
* \param ctx The SHA-256 context to initialize.
* \param is224 Determines which function to use.
* <ul><li>0: Use SHA-256.</li>
* <li>1: Use SHA-224.</li></ul>
*/
MBEDTLS_DEPRECATED void mbedtls_sha256_starts(mbedtls_sha256_context *ctx,
int is224);
/**
* \brief This function feeds an input buffer into an ongoing
* SHA-256 checksum calculation.
*
* \deprecated Superseded by mbedtls_sha256_update_ret() in 2.7.0.
*
* \param ctx The SHA-256 context to initialize.
* \param input The buffer holding the data.
* \param ilen The length of the input data.
*/
MBEDTLS_DEPRECATED void mbedtls_sha256_update(mbedtls_sha256_context *ctx,
const unsigned char *input,
size_t ilen);
/**
* \brief This function finishes the SHA-256 operation, and writes
* the result to the output buffer.
*
* \deprecated Superseded by mbedtls_sha256_finish_ret() in 2.7.0.
*
* \param ctx The SHA-256 context.
* \param output The SHA-224or SHA-256 checksum result.
*/
MBEDTLS_DEPRECATED void mbedtls_sha256_finish(mbedtls_sha256_context *ctx,
unsigned char output[32]);
/**
* \brief This function processes a single data block within
* the ongoing SHA-256 computation. This function is for
* internal use only.
*
* \deprecated Superseded by mbedtls_internal_sha256_process() in 2.7.0.
*
* \param ctx The SHA-256 context.
* \param data The buffer holding one block of data.
*/
MBEDTLS_DEPRECATED void mbedtls_sha256_process(mbedtls_sha256_context *ctx,
const unsigned char data[64]);
#undef MBEDTLS_DEPRECATED
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
#ifdef __cplusplus
}
#endif
#endif /* MBEDTLS_SHA256_ALT */
#endif /* sha256_alt.h */
