1 | /* md4.c
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2 | *
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3 | * Copyright (C) 2006-2015 wolfSSL Inc.
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4 | *
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5 | * This file is part of wolfSSL. (formerly known as CyaSSL)
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6 | *
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7 | * wolfSSL is free software; you can redistribute it and/or modify
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8 | * it under the terms of the GNU General Public License as published by
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9 | * the Free Software Foundation; either version 2 of the License, or
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10 | * (at your option) any later version.
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11 | *
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12 | * wolfSSL is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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20 | */
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21 |
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22 | #ifdef HAVE_CONFIG_H
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23 | #include <config.h>
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24 | #endif
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25 |
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26 | #include <wolfssl/wolfcrypt/settings.h>
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27 |
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28 | #ifndef NO_MD4
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29 |
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30 | #include <wolfssl/wolfcrypt/md4.h>
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31 | #ifdef NO_INLINE
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32 | #include <wolfssl/wolfcrypt/misc.h>
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33 | #else
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34 | #include <wolfcrypt/src/misc.c>
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35 | #endif
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36 |
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37 |
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38 | #ifdef min
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39 | #define WOLFSSL_HAVE_MIN
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40 | #endif
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41 | #ifndef WOLFSSL_HAVE_MIN
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42 | #define WOLFSSL_HAVE_MIN
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43 |
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44 | static INLINE word32 min(word32 a, word32 b)
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45 | {
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46 | return a > b ? b : a;
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47 | }
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48 |
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49 | #endif /* WOLFSSL_HAVE_MIN */
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50 |
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51 |
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52 | void wc_InitMd4(Md4* md4)
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53 | {
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54 | md4->digest[0] = 0x67452301L;
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55 | md4->digest[1] = 0xefcdab89L;
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56 | md4->digest[2] = 0x98badcfeL;
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57 | md4->digest[3] = 0x10325476L;
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58 |
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59 | md4->buffLen = 0;
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60 | md4->loLen = 0;
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61 | md4->hiLen = 0;
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62 | }
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63 |
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64 |
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65 | static void Transform(Md4* md4)
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66 | {
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67 | #define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
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68 | #define G(x, y, z) (((x) & (y)) | ((x) & (z)) | ((y) & (z)))
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69 | #define H(x, y, z) ((x) ^ (y) ^ (z))
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70 |
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71 | /* Copy context->state[] to working vars */
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72 | word32 A = md4->digest[0];
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73 | word32 B = md4->digest[1];
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74 | word32 C = md4->digest[2];
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75 | word32 D = md4->digest[3];
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76 |
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77 | #define function(a,b,c,d,k,s) a=rotlFixed(a+F(b,c,d)+md4->buffer[k],s);
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78 | function(A,B,C,D, 0, 3);
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79 | function(D,A,B,C, 1, 7);
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80 | function(C,D,A,B, 2,11);
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81 | function(B,C,D,A, 3,19);
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82 | function(A,B,C,D, 4, 3);
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83 | function(D,A,B,C, 5, 7);
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84 | function(C,D,A,B, 6,11);
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85 | function(B,C,D,A, 7,19);
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86 | function(A,B,C,D, 8, 3);
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87 | function(D,A,B,C, 9, 7);
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88 | function(C,D,A,B,10,11);
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89 | function(B,C,D,A,11,19);
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90 | function(A,B,C,D,12, 3);
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91 | function(D,A,B,C,13, 7);
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92 | function(C,D,A,B,14,11);
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93 | function(B,C,D,A,15,19);
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94 |
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95 | #undef function
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96 | #define function(a,b,c,d,k,s) \
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97 | a=rotlFixed(a+G(b,c,d)+md4->buffer[k]+0x5a827999,s);
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98 |
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99 | function(A,B,C,D, 0, 3);
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100 | function(D,A,B,C, 4, 5);
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101 | function(C,D,A,B, 8, 9);
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102 | function(B,C,D,A,12,13);
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103 | function(A,B,C,D, 1, 3);
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104 | function(D,A,B,C, 5, 5);
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105 | function(C,D,A,B, 9, 9);
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106 | function(B,C,D,A,13,13);
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107 | function(A,B,C,D, 2, 3);
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108 | function(D,A,B,C, 6, 5);
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109 | function(C,D,A,B,10, 9);
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110 | function(B,C,D,A,14,13);
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111 | function(A,B,C,D, 3, 3);
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112 | function(D,A,B,C, 7, 5);
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113 | function(C,D,A,B,11, 9);
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114 | function(B,C,D,A,15,13);
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115 |
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116 | #undef function
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117 | #define function(a,b,c,d,k,s) \
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118 | a=rotlFixed(a+H(b,c,d)+md4->buffer[k]+0x6ed9eba1,s);
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119 |
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120 | function(A,B,C,D, 0, 3);
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121 | function(D,A,B,C, 8, 9);
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122 | function(C,D,A,B, 4,11);
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123 | function(B,C,D,A,12,15);
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124 | function(A,B,C,D, 2, 3);
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125 | function(D,A,B,C,10, 9);
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126 | function(C,D,A,B, 6,11);
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127 | function(B,C,D,A,14,15);
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128 | function(A,B,C,D, 1, 3);
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129 | function(D,A,B,C, 9, 9);
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130 | function(C,D,A,B, 5,11);
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131 | function(B,C,D,A,13,15);
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132 | function(A,B,C,D, 3, 3);
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133 | function(D,A,B,C,11, 9);
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134 | function(C,D,A,B, 7,11);
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135 | function(B,C,D,A,15,15);
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136 |
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137 | /* Add the working vars back into digest state[] */
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138 | md4->digest[0] += A;
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139 | md4->digest[1] += B;
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140 | md4->digest[2] += C;
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141 | md4->digest[3] += D;
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142 | }
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143 |
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144 |
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145 | static INLINE void AddLength(Md4* md4, word32 len)
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146 | {
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147 | word32 tmp = md4->loLen;
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148 | if ( (md4->loLen += len) < tmp)
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149 | md4->hiLen++; /* carry low to high */
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150 | }
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151 |
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152 |
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153 | void wc_Md4Update(Md4* md4, const byte* data, word32 len)
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154 | {
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155 | /* do block size increments */
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156 | byte* local = (byte*)md4->buffer;
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157 |
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158 | while (len) {
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159 | word32 add = min(len, MD4_BLOCK_SIZE - md4->buffLen);
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160 | XMEMCPY(&local[md4->buffLen], data, add);
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161 |
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162 | md4->buffLen += add;
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163 | data += add;
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164 | len -= add;
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165 |
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166 | if (md4->buffLen == MD4_BLOCK_SIZE) {
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167 | #ifdef BIG_ENDIAN_ORDER
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168 | ByteReverseWords(md4->buffer, md4->buffer, MD4_BLOCK_SIZE);
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169 | #endif
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170 | Transform(md4);
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171 | AddLength(md4, MD4_BLOCK_SIZE);
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172 | md4->buffLen = 0;
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173 | }
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174 | }
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175 | }
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176 |
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177 |
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178 | void wc_Md4Final(Md4* md4, byte* hash)
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179 | {
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180 | byte* local = (byte*)md4->buffer;
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181 |
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182 | AddLength(md4, md4->buffLen); /* before adding pads */
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183 |
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184 | local[md4->buffLen++] = 0x80; /* add 1 */
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185 |
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186 | /* pad with zeros */
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187 | if (md4->buffLen > MD4_PAD_SIZE) {
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188 | XMEMSET(&local[md4->buffLen], 0, MD4_BLOCK_SIZE - md4->buffLen);
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189 | md4->buffLen += MD4_BLOCK_SIZE - md4->buffLen;
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190 |
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191 | #ifdef BIG_ENDIAN_ORDER
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192 | ByteReverseWords(md4->buffer, md4->buffer, MD4_BLOCK_SIZE);
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193 | #endif
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194 | Transform(md4);
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195 | md4->buffLen = 0;
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196 | }
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197 | XMEMSET(&local[md4->buffLen], 0, MD4_PAD_SIZE - md4->buffLen);
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198 |
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199 | /* put lengths in bits */
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200 | md4->hiLen = (md4->loLen >> (8*sizeof(md4->loLen) - 3)) +
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201 | (md4->hiLen << 3);
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202 | md4->loLen = md4->loLen << 3;
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203 |
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204 | /* store lengths */
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205 | #ifdef BIG_ENDIAN_ORDER
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206 | ByteReverseWords(md4->buffer, md4->buffer, MD4_BLOCK_SIZE);
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207 | #endif
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208 | /* ! length ordering dependent on digest endian type ! */
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209 | XMEMCPY(&local[MD4_PAD_SIZE], &md4->loLen, sizeof(word32));
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210 | XMEMCPY(&local[MD4_PAD_SIZE + sizeof(word32)], &md4->hiLen, sizeof(word32));
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211 |
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212 | Transform(md4);
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213 | #ifdef BIG_ENDIAN_ORDER
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214 | ByteReverseWords(md4->digest, md4->digest, MD4_DIGEST_SIZE);
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215 | #endif
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216 | XMEMCPY(hash, md4->digest, MD4_DIGEST_SIZE);
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217 |
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218 | wc_InitMd4(md4); /* reset state */
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219 | }
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220 |
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221 |
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222 | #endif /* NO_MD4 */
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223 |
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