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annotate deps/Platinum/ThirdParty/Neptune/ThirdParty/axTLS/crypto/md2.c @ 0:3425707ddbf6

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Initial import (hopefully this mercurial stuff works...)
author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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1 /*
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2 * Copyright (c) 2007, Cameron Rich
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3 *
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4 * All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * * Redistributions of source code must retain the above copyright notice,
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10 * this list of conditions and the following disclaimer.
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11 * * Redistributions in binary form must reproduce the above copyright notice,
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12 * this list of conditions and the following disclaimer in the documentation
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13 * and/or other materials provided with the distribution.
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14 * * Neither the name of the axTLS project nor the names of its contributors
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15 * may be used to endorse or promote products derived from this software
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16 * without specific prior written permission.
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17 *
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18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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25 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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26 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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27 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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28 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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29 */
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30
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31 /*
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32 * RFC 1115/1319 compliant MD2 implementation
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33 * The MD2 algorithm was designed by Ron Rivest in 1989.
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34 *
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35 * http://www.ietf.org/rfc/rfc1115.txt
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36 * http://www.ietf.org/rfc/rfc1319.txt
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37 */
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38
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39 #include <string.h>
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40 #include <stdio.h>
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41
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42 #include "crypto.h"
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43
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44 /**
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45 * This code is only here to enable the verification of Verisign root
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46 * certificates. So only enable it for verification mode.
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47 */
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48 #ifdef CONFIG_SSL_CERT_VERIFICATION
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49
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50 static const uint8_t PI_SUBST[256] =
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51 {
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52 0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
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53 0x54, 0xA1, 0xEC, 0xF0, 0x06, 0x13, 0x62, 0xA7, 0x05, 0xF3,
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54 0xC0, 0xC7, 0x73, 0x8C, 0x98, 0x93, 0x2B, 0xD9, 0xBC, 0x4C,
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55 0x82, 0xCA, 0x1E, 0x9B, 0x57, 0x3C, 0xFD, 0xD4, 0xE0, 0x16,
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56 0x67, 0x42, 0x6F, 0x18, 0x8A, 0x17, 0xE5, 0x12, 0xBE, 0x4E,
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57 0xC4, 0xD6, 0xDA, 0x9E, 0xDE, 0x49, 0xA0, 0xFB, 0xF5, 0x8E,
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58 0xBB, 0x2F, 0xEE, 0x7A, 0xA9, 0x68, 0x79, 0x91, 0x15, 0xB2,
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59 0x07, 0x3F, 0x94, 0xC2, 0x10, 0x89, 0x0B, 0x22, 0x5F, 0x21,
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60 0x80, 0x7F, 0x5D, 0x9A, 0x5A, 0x90, 0x32, 0x27, 0x35, 0x3E,
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61 0xCC, 0xE7, 0xBF, 0xF7, 0x97, 0x03, 0xFF, 0x19, 0x30, 0xB3,
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62 0x48, 0xA5, 0xB5, 0xD1, 0xD7, 0x5E, 0x92, 0x2A, 0xAC, 0x56,
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63 0xAA, 0xC6, 0x4F, 0xB8, 0x38, 0xD2, 0x96, 0xA4, 0x7D, 0xB6,
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64 0x76, 0xFC, 0x6B, 0xE2, 0x9C, 0x74, 0x04, 0xF1, 0x45, 0x9D,
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65 0x70, 0x59, 0x64, 0x71, 0x87, 0x20, 0x86, 0x5B, 0xCF, 0x65,
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66 0xE6, 0x2D, 0xA8, 0x02, 0x1B, 0x60, 0x25, 0xAD, 0xAE, 0xB0,
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67 0xB9, 0xF6, 0x1C, 0x46, 0x61, 0x69, 0x34, 0x40, 0x7E, 0x0F,
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68 0x55, 0x47, 0xA3, 0x23, 0xDD, 0x51, 0xAF, 0x3A, 0xC3, 0x5C,
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69 0xF9, 0xCE, 0xBA, 0xC5, 0xEA, 0x26, 0x2C, 0x53, 0x0D, 0x6E,
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70 0x85, 0x28, 0x84, 0x09, 0xD3, 0xDF, 0xCD, 0xF4, 0x41, 0x81,
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71 0x4D, 0x52, 0x6A, 0xDC, 0x37, 0xC8, 0x6C, 0xC1, 0xAB, 0xFA,
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72 0x24, 0xE1, 0x7B, 0x08, 0x0C, 0xBD, 0xB1, 0x4A, 0x78, 0x88,
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73 0x95, 0x8B, 0xE3, 0x63, 0xE8, 0x6D, 0xE9, 0xCB, 0xD5, 0xFE,
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74 0x3B, 0x00, 0x1D, 0x39, 0xF2, 0xEF, 0xB7, 0x0E, 0x66, 0x58,
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75 0xD0, 0xE4, 0xA6, 0x77, 0x72, 0xF8, 0xEB, 0x75, 0x4B, 0x0A,
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76 0x31, 0x44, 0x50, 0xB4, 0x8F, 0xED, 0x1F, 0x1A, 0xDB, 0x99,
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77 0x8D, 0x33, 0x9F, 0x11, 0x83, 0x14
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78 };
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79
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80 /*
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81 * MD2 context setup
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82 */
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83 EXP_FUNC void STDCALL MD2_Init(MD2_CTX *ctx)
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84 {
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85 memset(ctx, 0, sizeof *ctx);
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86 }
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87
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88 static void md2_process(MD2_CTX *ctx)
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89 {
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90 int i, j;
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91 uint8_t t = 0;
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92
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93 for (i = 0; i < 16; i++)
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94 {
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95 ctx->state[i + 16] = ctx->buffer[i];
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96 ctx->state[i + 32] = ctx->buffer[i] ^ ctx->state[i];
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97 }
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98
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99 for (i = 0; i < 18; i++)
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100 {
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101 for (j = 0; j < 48; j++)
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102 t = (ctx->state[j] ^= PI_SUBST[t]);
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103
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104 t = (t + i) & 0xFF;
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105 }
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106
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107 t = ctx->cksum[15];
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108
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109 for (i = 0; i < 16; i++)
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110 t = (ctx->cksum[i] ^= PI_SUBST[ctx->buffer[i] ^ t]);
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111 }
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112
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113 /*
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114 * MD2 process buffer
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115 */
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116 EXP_FUNC void STDCALL MD2_Update(MD2_CTX *ctx, const uint8_t *input, int ilen)
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117 {
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118 int fill;
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119
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120 while (ilen > 0)
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121 {
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122 if (ctx->left + ilen > 16)
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123 fill = 16 - ctx->left;
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124 else
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125 fill = ilen;
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126
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127 memcpy(ctx->buffer + ctx->left, input, fill);
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128
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129 ctx->left += fill;
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130 input += fill;
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131 ilen -= fill;
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132
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133 if (ctx->left == 16)
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134 {
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135 ctx->left = 0;
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136 md2_process(ctx);
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137 }
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138 }
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139 }
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140
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141 /*
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142 * MD2 final digest
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143 */
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144 EXP_FUNC void STDCALL MD2_Final(uint8_t *output, MD2_CTX *ctx)
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145 {
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146 int i;
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147 uint8_t x;
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148
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149 x = (uint8_t)(16 - ctx->left);
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150
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151 for (i = ctx->left; i < 16; i++)
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152 ctx->buffer[i] = x;
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153
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154 md2_process(ctx);
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155
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156 memcpy(ctx->buffer, ctx->cksum, 16);
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157 md2_process(ctx);
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158
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159 memcpy(output, ctx->state, 16);
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160 }
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161
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162 #endif