Sergey Pastor / 1

Webserver+3d print

Dependents:   Nucleo

cyclone_crypto/sha224.c@0:8918a71cdbe9, 2017-02-04 (annotated)

Committer:
Sergunb
Date:
Sat Feb 04 18:15:49 2017 +0000
Revision:
0:8918a71cdbe9
nothing else

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sergunb 0:8918a71cdbe9 1 /**
Sergunb 0:8918a71cdbe9 2 * @file sha224.c
Sergunb 0:8918a71cdbe9 3 * @brief SHA-224 (Secure Hash Algorithm 224)
Sergunb 0:8918a71cdbe9 4 *
Sergunb 0:8918a71cdbe9 5 * @section License
Sergunb 0:8918a71cdbe9 6 *
Sergunb 0:8918a71cdbe9 7 * Copyright (C) 2010-2017 Oryx Embedded SARL. All rights reserved.
Sergunb 0:8918a71cdbe9 8 *
Sergunb 0:8918a71cdbe9 9 * This file is part of CycloneCrypto Open.
Sergunb 0:8918a71cdbe9 10 *
Sergunb 0:8918a71cdbe9 11 * This program is free software; you can redistribute it and/or
Sergunb 0:8918a71cdbe9 12 * modify it under the terms of the GNU General Public License
Sergunb 0:8918a71cdbe9 13 * as published by the Free Software Foundation; either version 2
Sergunb 0:8918a71cdbe9 14 * of the License, or (at your option) any later version.
Sergunb 0:8918a71cdbe9 15 *
Sergunb 0:8918a71cdbe9 16 * This program is distributed in the hope that it will be useful,
Sergunb 0:8918a71cdbe9 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
Sergunb 0:8918a71cdbe9 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Sergunb 0:8918a71cdbe9 19 * GNU General Public License for more details.
Sergunb 0:8918a71cdbe9 20 *
Sergunb 0:8918a71cdbe9 21 * You should have received a copy of the GNU General Public License
Sergunb 0:8918a71cdbe9 22 * along with this program; if not, write to the Free Software Foundation,
Sergunb 0:8918a71cdbe9 23 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Sergunb 0:8918a71cdbe9 24 *
Sergunb 0:8918a71cdbe9 25 * @section Description
Sergunb 0:8918a71cdbe9 26 *
Sergunb 0:8918a71cdbe9 27 * SHA-224 is a secure hash algorithm for computing a condensed representation
Sergunb 0:8918a71cdbe9 28 * of an electronic message. Refer to FIPS 180-4 for more details
Sergunb 0:8918a71cdbe9 29 *
Sergunb 0:8918a71cdbe9 30 * @author Oryx Embedded SARL (www.oryx-embedded.com)
Sergunb 0:8918a71cdbe9 31 * @version 1.7.6
Sergunb 0:8918a71cdbe9 32 **/
Sergunb 0:8918a71cdbe9 33
Sergunb 0:8918a71cdbe9 34 //Switch to the appropriate trace level
Sergunb 0:8918a71cdbe9 35 #define TRACE_LEVEL CRYPTO_TRACE_LEVEL
Sergunb 0:8918a71cdbe9 36
Sergunb 0:8918a71cdbe9 37 //Dependencies
Sergunb 0:8918a71cdbe9 38 #include <string.h>
Sergunb 0:8918a71cdbe9 39 #include "crypto.h"
Sergunb 0:8918a71cdbe9 40 #include "sha224.h"
Sergunb 0:8918a71cdbe9 41
Sergunb 0:8918a71cdbe9 42 //Check crypto library configuration
Sergunb 0:8918a71cdbe9 43 #if (SHA224_SUPPORT == ENABLED)
Sergunb 0:8918a71cdbe9 44
Sergunb 0:8918a71cdbe9 45 //SHA-224 object identifier (2.16.840.1.101.3.4.2.4)
Sergunb 0:8918a71cdbe9 46 static const uint8_t sha224Oid[] = {0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x04};
Sergunb 0:8918a71cdbe9 47
Sergunb 0:8918a71cdbe9 48 //Common interface for hash algorithms
Sergunb 0:8918a71cdbe9 49 const HashAlgo sha224HashAlgo =
Sergunb 0:8918a71cdbe9 50 {
Sergunb 0:8918a71cdbe9 51 "SHA-224",
Sergunb 0:8918a71cdbe9 52 sha224Oid,
Sergunb 0:8918a71cdbe9 53 sizeof(sha224Oid),
Sergunb 0:8918a71cdbe9 54 sizeof(Sha224Context),
Sergunb 0:8918a71cdbe9 55 SHA224_BLOCK_SIZE,
Sergunb 0:8918a71cdbe9 56 SHA224_DIGEST_SIZE,
Sergunb 0:8918a71cdbe9 57 (HashAlgoCompute) sha224Compute,
Sergunb 0:8918a71cdbe9 58 (HashAlgoInit) sha224Init,
Sergunb 0:8918a71cdbe9 59 (HashAlgoUpdate) sha224Update,
Sergunb 0:8918a71cdbe9 60 (HashAlgoFinal) sha224Final
Sergunb 0:8918a71cdbe9 61 };
Sergunb 0:8918a71cdbe9 62
Sergunb 0:8918a71cdbe9 63
Sergunb 0:8918a71cdbe9 64 /**
Sergunb 0:8918a71cdbe9 65 * @brief Digest a message using SHA-224
Sergunb 0:8918a71cdbe9 66 * @param[in] data Pointer to the message being hashed
Sergunb 0:8918a71cdbe9 67 * @param[in] length Length of the message
Sergunb 0:8918a71cdbe9 68 * @param[out] digest Pointer to the calculated digest
Sergunb 0:8918a71cdbe9 69 * @return Error code
Sergunb 0:8918a71cdbe9 70 **/
Sergunb 0:8918a71cdbe9 71
Sergunb 0:8918a71cdbe9 72 error_t sha224Compute(const void *data, size_t length, uint8_t *digest)
Sergunb 0:8918a71cdbe9 73 {
Sergunb 0:8918a71cdbe9 74 //Allocate a memory buffer to hold the SHA-224 context
Sergunb 0:8918a71cdbe9 75 Sha224Context *context = cryptoAllocMem(sizeof(Sha224Context));
Sergunb 0:8918a71cdbe9 76 //Failed to allocate memory?
Sergunb 0:8918a71cdbe9 77 if(context == NULL)
Sergunb 0:8918a71cdbe9 78 return ERROR_OUT_OF_MEMORY;
Sergunb 0:8918a71cdbe9 79
Sergunb 0:8918a71cdbe9 80 //Initialize the SHA-224 context
Sergunb 0:8918a71cdbe9 81 sha224Init(context);
Sergunb 0:8918a71cdbe9 82 //Digest the message
Sergunb 0:8918a71cdbe9 83 sha224Update(context, data, length);
Sergunb 0:8918a71cdbe9 84 //Finalize the SHA-224 message digest
Sergunb 0:8918a71cdbe9 85 sha224Final(context, digest);
Sergunb 0:8918a71cdbe9 86
Sergunb 0:8918a71cdbe9 87 //Free previously allocated memory
Sergunb 0:8918a71cdbe9 88 cryptoFreeMem(context);
Sergunb 0:8918a71cdbe9 89 //Successful processing
Sergunb 0:8918a71cdbe9 90 return NO_ERROR;
Sergunb 0:8918a71cdbe9 91 }
Sergunb 0:8918a71cdbe9 92
Sergunb 0:8918a71cdbe9 93
Sergunb 0:8918a71cdbe9 94 /**
Sergunb 0:8918a71cdbe9 95 * @brief Initialize SHA-224 message digest context
Sergunb 0:8918a71cdbe9 96 * @param[in] context Pointer to the SHA-224 context to initialize
Sergunb 0:8918a71cdbe9 97 **/
Sergunb 0:8918a71cdbe9 98
Sergunb 0:8918a71cdbe9 99 void sha224Init(Sha224Context *context)
Sergunb 0:8918a71cdbe9 100 {
Sergunb 0:8918a71cdbe9 101 //Set initial hash value
Sergunb 0:8918a71cdbe9 102 context->h[0] = 0xC1059ED8;
Sergunb 0:8918a71cdbe9 103 context->h[1] = 0x367CD507;
Sergunb 0:8918a71cdbe9 104 context->h[2] = 0x3070DD17;
Sergunb 0:8918a71cdbe9 105 context->h[3] = 0xF70E5939;
Sergunb 0:8918a71cdbe9 106 context->h[4] = 0xFFC00B31;
Sergunb 0:8918a71cdbe9 107 context->h[5] = 0x68581511;
Sergunb 0:8918a71cdbe9 108 context->h[6] = 0x64F98FA7;
Sergunb 0:8918a71cdbe9 109 context->h[7] = 0xBEFA4FA4;
Sergunb 0:8918a71cdbe9 110
Sergunb 0:8918a71cdbe9 111 //Number of bytes in the buffer
Sergunb 0:8918a71cdbe9 112 context->size = 0;
Sergunb 0:8918a71cdbe9 113 //Total length of the message
Sergunb 0:8918a71cdbe9 114 context->totalSize = 0;
Sergunb 0:8918a71cdbe9 115 }
Sergunb 0:8918a71cdbe9 116
Sergunb 0:8918a71cdbe9 117
Sergunb 0:8918a71cdbe9 118 /**
Sergunb 0:8918a71cdbe9 119 * @brief Update the SHA-224 context with a portion of the message being hashed
Sergunb 0:8918a71cdbe9 120 * @param[in] context Pointer to the SHA-224 context
Sergunb 0:8918a71cdbe9 121 * @param[in] data Pointer to the buffer being hashed
Sergunb 0:8918a71cdbe9 122 * @param[in] length Length of the buffer
Sergunb 0:8918a71cdbe9 123 **/
Sergunb 0:8918a71cdbe9 124
Sergunb 0:8918a71cdbe9 125 void sha224Update(Sha224Context *context, const void *data, size_t length)
Sergunb 0:8918a71cdbe9 126 {
Sergunb 0:8918a71cdbe9 127 //The function is defined in the exact same manner as SHA-256
Sergunb 0:8918a71cdbe9 128 sha256Update(context, data, length);
Sergunb 0:8918a71cdbe9 129 }
Sergunb 0:8918a71cdbe9 130
Sergunb 0:8918a71cdbe9 131
Sergunb 0:8918a71cdbe9 132 /**
Sergunb 0:8918a71cdbe9 133 * @brief Finish the SHA-224 message digest
Sergunb 0:8918a71cdbe9 134 * @param[in] context Pointer to the SHA-224 context
Sergunb 0:8918a71cdbe9 135 * @param[out] digest Calculated digest (optional parameter)
Sergunb 0:8918a71cdbe9 136 **/
Sergunb 0:8918a71cdbe9 137
Sergunb 0:8918a71cdbe9 138 void sha224Final(Sha224Context *context, uint8_t *digest)
Sergunb 0:8918a71cdbe9 139 {
Sergunb 0:8918a71cdbe9 140 //The function is defined in the exact same manner as SHA-256
Sergunb 0:8918a71cdbe9 141 sha256Final(context, NULL);
Sergunb 0:8918a71cdbe9 142
Sergunb 0:8918a71cdbe9 143 //Copy the resulting digest
Sergunb 0:8918a71cdbe9 144 if(digest != NULL)
Sergunb 0:8918a71cdbe9 145 memcpy(digest, context->digest, SHA224_DIGEST_SIZE);
Sergunb 0:8918a71cdbe9 146 }
Sergunb 0:8918a71cdbe9 147
Sergunb 0:8918a71cdbe9 148 #endif
Sergunb 0:8918a71cdbe9 149