| /** |
| * \file mbedtls_sha256.h |
| * |
| * \brief SHA-224 and SHA-256 cryptographic hash function |
| * |
| * Copyright (C) 2006-2015, ARM Limited, 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 |
| |
| #if !defined(MBEDTLS_CONFIG_FILE) |
| #include "config.h" |
| #else |
| #include MBEDTLS_CONFIG_FILE |
| #endif |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #if !defined(MBEDTLS_SHA256_ALT) |
| // Regular implementation |
| // |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief SHA-256 context structure |
| */ |
| typedef struct |
| { |
| uint32_t total[2]; /*!< number of bytes processed */ |
| uint32_t state[8]; /*!< intermediate digest state */ |
| unsigned char buffer[64]; /*!< data block being processed */ |
| int is224; /*!< 0 => SHA-256, else SHA-224 */ |
| } |
| 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 |
| */ |
| void mbedtls_sha256_starts( 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 |
| */ |
| void mbedtls_sha256_update( 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 |
| */ |
| void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] ); |
| |
| /* Internal use */ |
| void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #else /* MBEDTLS_SHA256_ALT */ |
| #include "sha256_alt.h" |
| #endif /* MBEDTLS_SHA256_ALT */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief Output = SHA-256( input buffer ) |
| * |
| * \param input buffer holding the data |
| * \param ilen length of the input data |
| * \param output SHA-224/256 checksum result |
| * \param is224 0 = use SHA256, 1 = use SHA224 |
| */ |
| void mbedtls_sha256( const unsigned char *input, size_t ilen, |
| unsigned char output[32], int is224 ); |
| |
| /** |
| * \brief Checkup routine |
| * |
| * \return 0 if successful, or 1 if the test failed |
| */ |
| int mbedtls_sha256_self_test( int verbose ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* mbedtls_sha256.h */ |