reactos/sdk/include/reactos/libs/mbedtls/sha256.h

   1 /**
   2  * \file sha256.h
   3  *
   4  * \brief SHA-224 and SHA-256 cryptographic hash function
   5  *
   6  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
   7  *  SPDX-License-Identifier: Apache-2.0
   8  *
   9  *  Licensed under the Apache License, Version 2.0 (the "License"); you may
  10  *  not use this file except in compliance with the License.
  11  *  You may obtain a copy of the License at
  12  *
  13  *  http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  *  Unless required by applicable law or agreed to in writing, software
  16  *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
  17  *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  *  See the License for the specific language governing permissions and
  19  *  limitations under the License.
  20  *
  21  *  This file is part of mbed TLS (https://tls.mbed.org)
  22  */
  23 #ifndef MBEDTLS_SHA256_H
  24 #define MBEDTLS_SHA256_H
  25
  26 #if !defined(MBEDTLS_CONFIG_FILE)
  27 #include "config.h"
  28 #else
  29 #include MBEDTLS_CONFIG_FILE
  30 #endif
  31
  32 #include <stddef.h>
  33 #include <stdint.h>
  34
  35 #if !defined(MBEDTLS_SHA256_ALT)
  36 // Regular implementation
  37 //
  38
  39 #ifdef __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 /**
  44  * \brief          SHA-256 context structure
  45  */
  46 typedef struct
  47 {
  48     uint32_t total[2];          /*!< number of bytes processed  */
  49     uint32_t state[8];          /*!< intermediate digest state  */
  50     unsigned char buffer[64];   /*!< data block being processed */
  51     int is224;                  /*!< 0 => SHA-256, else SHA-224 */
  52 }
  53 mbedtls_sha256_context;
  54
  55 /**
  56  * \brief          Initialize SHA-256 context
  57  *
  58  * \param ctx      SHA-256 context to be initialized
  59  */
  60 void mbedtls_sha256_init( mbedtls_sha256_context *ctx );
  61
  62 /**
  63  * \brief          Clear SHA-256 context
  64  *
  65  * \param ctx      SHA-256 context to be cleared
  66  */
  67 void mbedtls_sha256_free( mbedtls_sha256_context *ctx );
  68
  69 /**
  70  * \brief          Clone (the state of) a SHA-256 context
  71  *
  72  * \param dst      The destination context
  73  * \param src      The context to be cloned
  74  */
  75 void mbedtls_sha256_clone( mbedtls_sha256_context *dst,
  76                            const mbedtls_sha256_context *src );
  77
  78 /**
  79  * \brief          SHA-256 context setup
  80  *
  81  * \param ctx      context to be initialized
  82  * \param is224    0 = use SHA256, 1 = use SHA224
  83  */
  84 void mbedtls_sha256_starts( mbedtls_sha256_context *ctx, int is224 );
  85
  86 /**
  87  * \brief          SHA-256 process buffer
  88  *
  89  * \param ctx      SHA-256 context
  90  * \param input    buffer holding the  data
  91  * \param ilen     length of the input data
  92  */
  93 void mbedtls_sha256_update( mbedtls_sha256_context *ctx, const unsigned char *input,
  94                     size_t ilen );
  95
  96 /**
  97  * \brief          SHA-256 final digest
  98  *
  99  * \param ctx      SHA-256 context
 100  * \param output   SHA-224/256 checksum result
 101  */
 102 void mbedtls_sha256_finish( mbedtls_sha256_context *ctx, unsigned char output[32] );
 103
 104 /* Internal use */
 105 void mbedtls_sha256_process( mbedtls_sha256_context *ctx, const unsigned char data[64] );
 106
 107 #ifdef __cplusplus
 108 }
 109 #endif
 110
 111 #else  /* MBEDTLS_SHA256_ALT */
 112 #include "sha256_alt.h"
 113 #endif /* MBEDTLS_SHA256_ALT */
 114
 115 #ifdef __cplusplus
 116 extern "C" {
 117 #endif
 118
 119 /**
 120  * \brief          Output = SHA-256( input buffer )
 121  *
 122  * \param input    buffer holding the  data
 123  * \param ilen     length of the input data
 124  * \param output   SHA-224/256 checksum result
 125  * \param is224    0 = use SHA256, 1 = use SHA224
 126  */
 127 void mbedtls_sha256( const unsigned char *input, size_t ilen,
 128            unsigned char output[32], int is224 );
 129
 130 /**
 131  * \brief          Checkup routine
 132  *
 133  * \return         0 if successful, or 1 if the test failed
 134  */
 135 int mbedtls_sha256_self_test( int verbose );
 136
 137 #ifdef __cplusplus
 138 }
 139 #endif
 140
 141 #endif /* mbedtls_sha256.h */