sha256.h

Go to the documentation of this file.

/*
 *  Copyright The Mbed TLS Contributors
 *  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_H
#define MBEDTLS_SHA256_H
#include "mbedtls/private_access.h"

#include "mbedtls/build_info.h"

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

#define MBEDTLS_ERR_SHA256_BAD_INPUT_DATA                 -0x0074

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(MBEDTLS_SHA256_ALT)
// Regular implementation
//

typedef struct mbedtls_sha256_context
{
    uint32_t MBEDTLS_PRIVATE(total)[2];          
    uint32_t MBEDTLS_PRIVATE(state)[8];          
    unsigned char MBEDTLS_PRIVATE(buffer)[64];   
    int MBEDTLS_PRIVATE(is224);                  
}
mbedtls_sha256_context;

#else  /* MBEDTLS_SHA256_ALT */
#include "sha256_alt.h"
#endif /* MBEDTLS_SHA256_ALT */

void mbedtls_sha256_init( mbedtls_sha256_context *ctx );

void mbedtls_sha256_free( mbedtls_sha256_context *ctx );

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

int mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 );

int mbedtls_sha256_update( mbedtls_sha256_context *ctx,
                           const unsigned char *input,
                           size_t ilen );

int mbedtls_sha256_finish( mbedtls_sha256_context *ctx,
                           unsigned char *output );

int mbedtls_internal_sha256_process( mbedtls_sha256_context *ctx,
                                     const unsigned char data[64] );

int mbedtls_sha256( const unsigned char *input,
                    size_t ilen,
                    unsigned char *output,
                    int is224 );

#if defined(MBEDTLS_SELF_TEST)

int mbedtls_sha256_self_test( int verbose );

#endif /* MBEDTLS_SELF_TEST */

#ifdef __cplusplus
}
#endif

#endif /* mbedtls_sha256.h */