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annotate src/md5/md5c.c @ 203:45acc5727493

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removed --with-glib-static configure option linking glib statically is interesting if no other program uses it on today's systems glib is widely used if one cares on linking statically, he can link everything statically the special case for glib will not get special care anymore
author meillo@marmaro.de
date Fri, 16 Jul 2010 14:48:17 +0200
parents 26e34ae9a3e3
children
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1 /* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
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2 */
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3
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4 /* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
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5 rights reserved.
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6
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7 License to copy and use this software is granted provided that it
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8 is identified as the "RSA Data Security, Inc. MD5 Message-Digest
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9 Algorithm" in all material mentioning or referencing this software
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10 or this function.
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11
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12 License is also granted to make and use derivative works provided
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13 that such works are identified as "derived from the RSA Data
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14 Security, Inc. MD5 Message-Digest Algorithm" in all material
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15 mentioning or referencing the derived work.
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16
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17 RSA Data Security, Inc. makes no representations concerning either
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18 the merchantability of this software or the suitability of this
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19 software for any particular purpose. It is provided "as is"
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20 without express or implied warranty of any kind.
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21
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22 These notices must be retained in any copies of any part of this
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23 documentation and/or software.
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24 */
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25
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26 #include "global.h"
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27 #include "md5.h"
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28
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29 /* Constants for MD5Transform routine.
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30 */
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31 #define S11 7
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32 #define S12 12
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33 #define S13 17
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34 #define S14 22
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35 #define S21 5
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36 #define S22 9
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37 #define S23 14
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38 #define S24 20
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39 #define S31 4
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40 #define S32 11
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41 #define S33 16
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42 #define S34 23
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43 #define S41 6
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44 #define S42 10
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45 #define S43 15
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46 #define S44 21
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47
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48 static void MD5Transform PROTO_LIST((UINT4[4], unsigned char[64]));
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49 static void Encode PROTO_LIST((unsigned char *, UINT4 *, unsigned int));
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50 static void Decode PROTO_LIST((UINT4 *, unsigned char *, unsigned int));
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51 static void MD5_memcpy PROTO_LIST((POINTER, POINTER, unsigned int));
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52 static void MD5_memset PROTO_LIST((POINTER, int, unsigned int));
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53
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54 static unsigned char PADDING[64] = {
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55 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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57 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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58 };
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59
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60 /* F, G, H and I are basic MD5 functions.
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61 */
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62 #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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63 #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
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64 #define H(x, y, z) ((x) ^ (y) ^ (z))
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65 #define I(x, y, z) ((y) ^ ((x) | (~z)))
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66
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67 /* ROTATE_LEFT rotates x left n bits.
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68 */
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69 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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70
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71 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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72 Rotation is separate from addition to prevent recomputation.
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73 */
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74 #define FF(a, b, c, d, x, s, ac) { \
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75 (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
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76 (a) = ROTATE_LEFT ((a), (s)); \
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77 (a) += (b); \
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78 }
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79 #define GG(a, b, c, d, x, s, ac) { \
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80 (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
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81 (a) = ROTATE_LEFT ((a), (s)); \
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82 (a) += (b); \
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83 }
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84 #define HH(a, b, c, d, x, s, ac) { \
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85 (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
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86 (a) = ROTATE_LEFT ((a), (s)); \
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87 (a) += (b); \
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88 }
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89 #define II(a, b, c, d, x, s, ac) { \
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90 (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
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91 (a) = ROTATE_LEFT ((a), (s)); \
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92 (a) += (b); \
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93 }
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94
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95 /* MD5 initialization. Begins an MD5 operation, writing a new context.
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96 */
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97 void
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98 MD5Init(context)
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99 MD5_CTX *context; /* context */
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100 {
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101 context->count[0] = context->count[1] = 0;
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102 /* Load magic initialization constants. */
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103 context->state[0] = 0x67452301;
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104 context->state[1] = 0xefcdab89;
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105 context->state[2] = 0x98badcfe;
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106 context->state[3] = 0x10325476;
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107 }
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108
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109 /* MD5 block update operation. Continues an MD5 message-digest
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110 operation, processing another message block, and updating the
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111 context.
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112 */
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113 void
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114 MD5Update(context, input, inputLen)
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115 MD5_CTX *context; /* context */
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116 unsigned char *input; /* input block */
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117 unsigned int inputLen; /* length of input block */
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118 {
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119 unsigned int i, index, partLen;
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120
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121 /* Compute number of bytes mod 64 */
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122 index = (unsigned int) ((context->count[0] >> 3) & 0x3F);
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123
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124 /* Update number of bits */
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125 if ((context->count[0] += ((UINT4) inputLen << 3)) < ((UINT4) inputLen << 3))
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126 context->count[1]++;
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127 context->count[1] += ((UINT4) inputLen >> 29);
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128
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129 partLen = 64 - index;
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130
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131 /* Transform as many times as possible.
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132 */
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133 if (inputLen >= partLen) {
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134 MD5_memcpy((POINTER) & context->buffer[index], (POINTER) input, partLen);
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135 MD5Transform(context->state, context->buffer);
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136
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137 for (i = partLen; i + 63 < inputLen; i += 64)
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138 MD5Transform(context->state, &input[i]);
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139
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140 index = 0;
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141 } else
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142 i = 0;
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143
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144 /* Buffer remaining input */
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145 MD5_memcpy((POINTER) & context->buffer[index], (POINTER) & input[i], inputLen - i);
0
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146 }
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147
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148 /* MD5 finalization. Ends an MD5 message-digest operation, writing the
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149 the message digest and zeroizing the context.
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150 */
10
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151 void
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152 MD5Final(digest, context)
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153 unsigned char digest[16]; /* message digest */
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154 MD5_CTX *context; /* context */
0
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155 {
10
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156 unsigned char bits[8];
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157 unsigned int index, padLen;
0
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158
10
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159 /* Save number of bits */
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160 Encode(bits, context->count, 8);
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161
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162 /* Pad out to 56 mod 64.
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163 */
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164 index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
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165 padLen = (index < 56) ? (56 - index) : (120 - index);
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166 MD5Update(context, PADDING, padLen);
0
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167
10
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168 /* Append length (before padding) */
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169 MD5Update(context, bits, 8);
0
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170
10
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171 /* Store state in digest */
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172 Encode(digest, context->state, 16);
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173
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174 /* Zeroize sensitive information.
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175 */
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176 MD5_memset((POINTER) context, 0, sizeof(*context));
0
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177 }
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178
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179 /* MD5 basic transformation. Transforms state based on block.
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180 */
10
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181 static void
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182 MD5Transform(state, block)
0
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183 UINT4 state[4];
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184 unsigned char block[64];
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185 {
10
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186 UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
0
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187
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188 Decode(x, block, 64);
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189
10
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190 /* Round 1 */
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191 FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
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192 FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
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193 FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
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194 FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
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195 FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
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196 FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
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197 FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
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198 FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
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199 FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
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200 FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
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201 FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
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202 FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
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203 FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
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204 FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
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205 FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
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206 FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
0
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207
10
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208 /* Round 2 */
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209 GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
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210 GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
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211 GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
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212 GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
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213 GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
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214 GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
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215 GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
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216 GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
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217 GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
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218 GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
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219 GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
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220 GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
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221 GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
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222 GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
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223 GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
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224 GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
0
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225
10
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226 /* Round 3 */
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227 HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
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228 HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
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229 HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
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230 HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
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231 HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
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232 HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
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233 HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
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234 HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
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235 HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
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236 HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
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237 HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
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238 HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
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239 HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
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240 HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
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241 HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
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242 HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
0
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243
10
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244 /* Round 4 */
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245 II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
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246 II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
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247 II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
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248 II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
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249 II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
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250 II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
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251 II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
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252 II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
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253 II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
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254 II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
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255 II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
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256 II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
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257 II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
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258 II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
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259 II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
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260 II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
0
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261
10
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262 state[0] += a;
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263 state[1] += b;
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264 state[2] += c;
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265 state[3] += d;
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266
10
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267 /* Zeroize sensitive information. */
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268 MD5_memset((POINTER) x, 0, sizeof(x));
0
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269 }
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270
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271 /* Encodes input (UINT4) into output (unsigned char). Assumes len is
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272 a multiple of 4.
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273 */
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274 static void
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275 Encode(output, input, len)
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276 unsigned char *output;
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277 UINT4 *input;
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278 unsigned int len;
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279 {
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280 unsigned int i, j;
0
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281
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282 for (i = 0, j = 0; j < len; i++, j += 4) {
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283 output[j] = (unsigned char) (input[i] & 0xff);
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284 output[j + 1] = (unsigned char) ((input[i] >> 8) & 0xff);
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285 output[j + 2] = (unsigned char) ((input[i] >> 16) & 0xff);
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286 output[j + 3] = (unsigned char) ((input[i] >> 24) & 0xff);
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287 }
0
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288 }
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289
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290 /* Decodes input (unsigned char) into output (UINT4). Assumes len is
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291 a multiple of 4.
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292 */
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293 static void
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294 Decode(output, input, len)
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295 UINT4 *output;
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296 unsigned char *input;
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297 unsigned int len;
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298 {
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299 unsigned int i, j;
0
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300
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301 for (i = 0, j = 0; j < len; i++, j += 4)
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302 output[i] = ((UINT4) input[j]) | (((UINT4) input[j + 1]) << 8) | (((UINT4) input[j + 2]) << 16) | (((UINT4) input[j + 3]) << 24);
0
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303 }
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304
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305 /* Note: Replace "for loop" with standard memcpy if possible.
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306 */
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307
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308 static void
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309 MD5_memcpy(output, input, len)
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310 POINTER output;
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311 POINTER input;
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312 unsigned int len;
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313 {
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314 unsigned int i;
0
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315
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316 for (i = 0; i < len; i++)
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317 output[i] = input[i];
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318 }
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319
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320 /* Note: Replace "for loop" with standard memset if possible.
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321 */
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322 static void
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323 MD5_memset(output, value, len)
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324 POINTER output;
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325 int value;
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326 unsigned int len;
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327 {
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328 unsigned int i;
0
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329
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330 for (i = 0; i < len; i++)
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331 ((char *) output)[i] = (char) value;
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332 }