1 | //FIXME Not checked on threadsafety yet; after checking please remove this line
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2 | /*
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3 | * MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm
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4 | *
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5 | * Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
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6 | * rights reserved.
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7 | *
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8 | * License to copy and use this software is granted provided that it
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9 | * is identified as the "RSA Data Security, Inc. MD5 Message-Digest
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10 | * Algorithm" in all material mentioning or referencing this software
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11 | * or this function.
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12 | *
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13 | * License is also granted to make and use derivative works provided
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14 | * that such works are identified as "derived from the RSA Data
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15 | * Security, Inc. MD5 Message-Digest Algorithm" in all material
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16 | * mentioning or referencing the derived work.
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17 | *
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18 | * RSA Data Security, Inc. makes no representations concerning either
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19 | * the merchantability of this software or the suitability of this
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20 | * software for any particular purpose. It is provided "as is"
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21 | * without express or implied warranty of any kind.
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22 | *
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23 | * These notices must be retained in any copies of any part of this
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24 | * documentation and/or software.
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25 | *
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26 | * $FreeBSD: src/lib/libmd/md5c.c,v 1.9.2.1 1999/08/29 14:57:12 peter Exp $
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27 | *
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28 | * This code is the same as the code published by RSA Inc. It has been
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29 | * edited for clarity and style only.
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30 | *
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31 | * ----------------------------------------------------------------------------
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32 | * The md5_crypt() function was taken from freeBSD's libcrypt and contains
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33 | * this license:
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34 | * "THE BEER-WARE LICENSE" (Revision 42):
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35 | * <phk@login.dknet.dk> wrote this file. As long as you retain this notice you
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36 | * can do whatever you want with this stuff. If we meet some day, and you think
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37 | * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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38 | *
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39 | * $FreeBSD: src/lib/libcrypt/crypt.c,v 1.7.2.1 1999/08/29 14:56:33 peter Exp $
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40 | *
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41 | * ----------------------------------------------------------------------------
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42 | * On April 19th, 2001 md5_crypt() was modified to make it reentrant
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43 | * by Erik Andersen <andersen@uclibc.org>
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44 | *
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45 | *
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46 | * June 28, 2001 Manuel Novoa III
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47 | *
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48 | * "Un-inlined" code using loops and static const tables in order to
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49 | * reduce generated code size (on i386 from approx 4k to approx 2.5k).
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50 | *
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51 | * June 29, 2001 Manuel Novoa III
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52 | *
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53 | * Completely removed static PADDING array.
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54 | *
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55 | * Reintroduced the loop unrolling in MD5_Transform and added the
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56 | * MD5_SIZE_OVER_SPEED option for configurability. Define below as:
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57 | * 0 fully unrolled loops
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58 | * 1 partially unrolled (4 ops per loop)
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59 | * 2 no unrolling -- introduces the need to swap 4 variables (slow)
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60 | * 3 no unrolling and all 4 loops merged into one with switch
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61 | * in each loop (glacial)
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62 | * On i386, sizes are roughly (-Os -fno-builtin):
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63 | * 0: 3k 1: 2.5k 2: 2.2k 3: 2k
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64 | *
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65 | *
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66 | * Since SuSv3 does not require crypt_r, modified again August 7, 2002
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67 | * by Erik Andersen to remove reentrance stuff...
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68 | */
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69 |
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70 | /*
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71 | * Valid values are 1 (fastest/largest) to 3 (smallest/slowest).
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72 | */
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73 | #define MD5_SIZE_OVER_SPEED 3
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74 |
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75 | /**********************************************************************/
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76 |
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77 | #include <sys/types.h>
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78 | #include <string.h>
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79 | #include <unistd.h>
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80 | #include <stdio.h>
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81 | //#include <crypt.h>
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82 | #include "cscrypt.h"
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83 |
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84 | /* MD5 context. */
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85 | struct MD5Context {
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86 | u_int32_t state[4]; /* state (ABCD) */
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87 | u_int32_t count[2]; /* number of bits, modulo 2^64 (lsb first) */
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88 | unsigned char buffer[64]; /* input buffer */
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89 | };
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90 |
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91 | static void __md5_Init (struct MD5Context *);
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92 | static void __md5_Update (struct MD5Context *, const unsigned char *, unsigned int);
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93 | static void __md5_Pad (struct MD5Context *);
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94 | static void __md5_Final (unsigned char [16], struct MD5Context *);
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95 | static void __md5_Transform __P((u_int32_t [4], const unsigned char [64]));
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96 |
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97 |
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98 | static const char __md5__magic[] = "$1$"; /* This string is magic for this algorithm. Having
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99 | it this way, we can get better later on */
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100 | static const unsigned char __md5_itoa64[] = /* 0 ... 63 => ascii - 64 */
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101 | "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
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102 |
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103 |
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104 |
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105 | #ifdef i386
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106 | #define __md5_Encode memcpy
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107 | #define __md5_Decode memcpy
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108 | #else /* i386 */
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109 |
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110 | /*
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111 | * __md5_Encodes input (u_int32_t) into output (unsigned char). Assumes len is
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112 | * a multiple of 4.
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113 | */
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114 |
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115 | static void
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116 | __md5_Encode (output, input, len)
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117 | unsigned char *output;
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118 | u_int32_t *input;
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119 | unsigned int len;
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120 | {
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121 | unsigned int i, j;
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122 |
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123 | for (i = 0, j = 0; j < len; i++, j += 4) {
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124 | output[j] = (unsigned char)(input[i] & 0xff);
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125 | output[j+1] = (unsigned char)((input[i] >> 8) & 0xff);
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126 | output[j+2] = (unsigned char)((input[i] >> 16) & 0xff);
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127 | output[j+3] = (unsigned char)((input[i] >> 24) & 0xff);
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128 | }
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129 | }
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130 |
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131 | /*
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132 | * __md5_Decodes input (unsigned char) into output (u_int32_t). Assumes len is
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133 | * a multiple of 4.
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134 | */
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135 |
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136 | static void
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137 | __md5_Decode (output, input, len)
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138 | u_int32_t *output;
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139 | const unsigned char *input;
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140 | unsigned int len;
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141 | {
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142 | unsigned int i, j;
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143 |
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144 | for (i = 0, j = 0; j < len; i++, j += 4)
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145 | output[i] = ((u_int32_t)input[j]) | (((u_int32_t)input[j+1]) << 8) |
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146 | (((u_int32_t)input[j+2]) << 16) | (((u_int32_t)input[j+3]) << 24);
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147 | }
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148 | #endif /* i386 */
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149 |
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150 | /* F, G, H and I are basic MD5 functions. */
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151 | #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
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152 | #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
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153 | #define H(x, y, z) ((x) ^ (y) ^ (z))
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154 | #define I(x, y, z) ((y) ^ ((x) | (~z)))
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155 |
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156 | /* ROTATE_LEFT rotates x left n bits. */
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157 | #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
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158 |
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159 | /*
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160 | * FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
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161 | * Rotation is separate from addition to prevent recomputation.
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162 | */
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163 | #define FF(a, b, c, d, x, s, ac) { \
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164 | (a) += F ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
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165 | (a) = ROTATE_LEFT ((a), (s)); \
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166 | (a) += (b); \
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167 | }
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168 | #define GG(a, b, c, d, x, s, ac) { \
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169 | (a) += G ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
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170 | (a) = ROTATE_LEFT ((a), (s)); \
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171 | (a) += (b); \
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172 | }
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173 | #define HH(a, b, c, d, x, s, ac) { \
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174 | (a) += H ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
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175 | (a) = ROTATE_LEFT ((a), (s)); \
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176 | (a) += (b); \
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177 | }
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178 | #define II(a, b, c, d, x, s, ac) { \
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179 | (a) += I ((b), (c), (d)) + (x) + (u_int32_t)(ac); \
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180 | (a) = ROTATE_LEFT ((a), (s)); \
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181 | (a) += (b); \
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182 | }
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183 |
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184 | /* MD5 initialization. Begins an MD5 operation, writing a new context. */
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185 |
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186 | static void __md5_Init (struct MD5Context *context)
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187 | {
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188 | context->count[0] = context->count[1] = 0;
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189 |
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190 | /* Load magic initialization constants. */
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191 | context->state[0] = 0x67452301;
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192 | context->state[1] = 0xefcdab89;
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193 | context->state[2] = 0x98badcfe;
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194 | context->state[3] = 0x10325476;
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195 | }
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196 |
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197 | /*
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198 | * MD5 block update operation. Continues an MD5 message-digest
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199 | * operation, processing another message block, and updating the
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200 | * context.
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201 | */
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202 |
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203 | static void __md5_Update ( struct MD5Context *context, const unsigned char *input, unsigned int inputLen)
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204 | {
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205 | unsigned int i, index, partLen;
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206 |
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207 | /* Compute number of bytes mod 64 */
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208 | index = (unsigned int)((context->count[0] >> 3) & 0x3F);
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209 |
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210 | /* Update number of bits */
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211 | if ((context->count[0] += ((u_int32_t)inputLen << 3))
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212 | < ((u_int32_t)inputLen << 3))
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213 | context->count[1]++;
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214 | context->count[1] += ((u_int32_t)inputLen >> 29);
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215 |
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216 | partLen = 64 - index;
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217 |
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218 | /* Transform as many times as possible. */
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219 | if (inputLen >= partLen) {
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220 | memcpy((void *)&context->buffer[index], (const void *)input,
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221 | partLen);
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222 | __md5_Transform (context->state, context->buffer);
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223 |
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224 | for (i = partLen; i + 63 < inputLen; i += 64)
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225 | __md5_Transform (context->state, &input[i]);
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226 |
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227 | index = 0;
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228 | }
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229 | else
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230 | i = 0;
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231 |
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232 | /* Buffer remaining input */
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233 | memcpy ((void *)&context->buffer[index], (const void *)&input[i],
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234 | inputLen-i);
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235 | }
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236 |
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237 | /*
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238 | * MD5 padding. Adds padding followed by original length.
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239 | */
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240 |
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241 | static void __md5_Pad ( struct MD5Context *context)
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242 | {
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243 | unsigned char bits[8];
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244 | unsigned int index, padLen;
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245 | unsigned char PADDING[64];
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246 |
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247 | memset(PADDING, 0, sizeof(PADDING));
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248 | PADDING[0] = 0x80;
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249 |
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250 | /* Save number of bits */
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251 | __md5_Encode (bits, context->count, 8);
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252 |
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253 | /* Pad out to 56 mod 64. */
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254 | index = (unsigned int)((context->count[0] >> 3) & 0x3f);
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255 | padLen = (index < 56) ? (56 - index) : (120 - index);
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256 | __md5_Update (context, PADDING, padLen);
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257 |
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258 | /* Append length (before padding) */
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259 | __md5_Update (context, bits, 8);
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260 | }
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261 |
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262 | /*
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263 | * MD5 finalization. Ends an MD5 message-digest operation, writing the
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264 | * the message digest and zeroizing the context.
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265 | */
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266 |
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267 | static void __md5_Final ( unsigned char digest[16], struct MD5Context *context)
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268 | {
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269 | /* Do padding. */
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270 | __md5_Pad (context);
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271 |
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272 | /* Store state in digest */
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273 | __md5_Encode (digest, context->state, 16);
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274 |
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275 | /* Zeroize sensitive information. */
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276 | memset ((void *)context, 0, sizeof (*context));
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277 | }
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278 |
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279 | /* MD5 basic transformation. Transforms state based on block. */
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280 |
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281 | static void
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282 | __md5_Transform (state, block)
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283 | u_int32_t state[4];
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284 | const unsigned char block[64];
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285 | {
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286 | u_int32_t a, b, c, d, x[16];
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287 |
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288 | #if MD5_SIZE_OVER_SPEED > 1
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289 | u_int32_t temp;
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290 | const char *ps;
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291 |
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292 | static const char S[] = {
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293 | 7, 12, 17, 22,
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294 | 5, 9, 14, 20,
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295 | 4, 11, 16, 23,
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296 | 6, 10, 15, 21
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297 | };
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298 | #endif /* MD5_SIZE_OVER_SPEED > 1 */
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299 |
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300 | #if MD5_SIZE_OVER_SPEED > 0
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301 | const u_int32_t *pc;
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302 | const char *pp;
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303 | int i;
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304 |
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305 | static const u_int32_t C[] = {
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306 | /* round 1 */
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307 | 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
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308 | 0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
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309 | 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
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310 | 0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
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311 | /* round 2 */
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312 | 0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
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313 | 0xd62f105d, 0x2441453, 0xd8a1e681, 0xe7d3fbc8,
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314 | 0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
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315 | 0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
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316 | /* round 3 */
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317 | 0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
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318 | 0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
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319 | 0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x4881d05,
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320 | 0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
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321 | /* round 4 */
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322 | 0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
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323 | 0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
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324 | 0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
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325 | 0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
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326 | };
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327 |
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328 | static const char P[] = {
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329 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* 1 */
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330 | 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, /* 2 */
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331 | 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, /* 3 */
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332 | 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9 /* 4 */
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333 | };
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334 |
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335 | #endif /* MD5_SIZE_OVER_SPEED > 0 */
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336 |
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337 | __md5_Decode (x, block, 64);
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338 |
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339 | a = state[0]; b = state[1]; c = state[2]; d = state[3];
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340 |
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341 | #if MD5_SIZE_OVER_SPEED > 2
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342 | pc = C; pp = P; ps = S - 4;
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343 |
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344 | for ( i = 0 ; i < 64 ; i++ ) {
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345 | if ((i&0x0f) == 0) ps += 4;
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346 | temp = a;
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347 | switch (i>>4) {
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348 | case 0:
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349 | temp += F(b,c,d);
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350 | break;
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351 | case 1:
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352 | temp += G(b,c,d);
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353 | break;
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354 | case 2:
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355 | temp += H(b,c,d);
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356 | break;
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357 | case 3:
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358 | temp += I(b,c,d);
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359 | break;
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360 | }
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361 | temp += x[(int)(*pp++)] + *pc++;
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362 | temp = ROTATE_LEFT(temp, ps[i&3]);
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363 | temp += b;
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364 | a = d; d = c; c = b; b = temp;
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365 | }
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366 | #elif MD5_SIZE_OVER_SPEED > 1
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367 | pc = C; pp = P; ps = S;
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368 |
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369 | /* Round 1 */
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370 | for ( i = 0 ; i < 16 ; i++ ) {
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371 | FF (a, b, c, d, x[(int)(*pp++)], ps[i&0x3], *pc++);
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372 | temp = d; d = c; c = b; b = a; a = temp;
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373 | }
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374 |
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375 | /* Round 2 */
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376 | ps += 4;
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377 | for ( ; i < 32 ; i++ ) {
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378 | GG (a, b, c, d, x[(int)(*pp++)], ps[i&0x3], *pc++);
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379 | temp = d; d = c; c = b; b = a; a = temp;
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380 | }
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381 | /* Round 3 */
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382 | ps += 4;
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383 | for ( ; i < 48 ; i++ ) {
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384 | HH (a, b, c, d, x[(int)(*pp++)], ps[i&0x3], *pc++);
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385 | temp = d; d = c; c = b; b = a; a = temp;
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386 | }
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387 |
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388 | /* Round 4 */
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389 | ps += 4;
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390 | for ( ; i < 64 ; i++ ) {
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391 | II (a, b, c, d, x[(int)(*pp++)], ps[i&0x3], *pc++);
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392 | temp = d; d = c; c = b; b = a; a = temp;
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393 | }
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394 | #elif MD5_SIZE_OVER_SPEED > 0
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395 | pc = C; pp = P;
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396 |
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397 | /* Round 1 */
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398 | for ( i = 0 ; i < 4 ; i++ ) {
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399 | FF (a, b, c, d, x[(int)(*pp++)], 7, *pc++);
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400 | FF (d, a, b, c, x[(int)(*pp++)], 12, *pc++);
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401 | FF (c, d, a, b, x[(int)(*pp++)], 17, *pc++);
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402 | FF (b, c, d, a, x[(int)(*pp++)], 22, *pc++);
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403 | }
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404 |
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405 | /* Round 2 */
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406 | for ( i = 0 ; i < 4 ; i++ ) {
|
---|
407 | GG (a, b, c, d, x[(int)(*pp++)], 5, *pc++);
|
---|
408 | GG (d, a, b, c, x[(int)(*pp++)], 9, *pc++);
|
---|
409 | GG (c, d, a, b, x[(int)(*pp++)], 14, *pc++);
|
---|
410 | GG (b, c, d, a, x[(int)(*pp++)], 20, *pc++);
|
---|
411 | }
|
---|
412 | /* Round 3 */
|
---|
413 | for ( i = 0 ; i < 4 ; i++ ) {
|
---|
414 | HH (a, b, c, d, x[(int)(*pp++)], 4, *pc++);
|
---|
415 | HH (d, a, b, c, x[(int)(*pp++)], 11, *pc++);
|
---|
416 | HH (c, d, a, b, x[(int)(*pp++)], 16, *pc++);
|
---|
417 | HH (b, c, d, a, x[(int)(*pp++)], 23, *pc++);
|
---|
418 | }
|
---|
419 |
|
---|
420 | /* Round 4 */
|
---|
421 | for ( i = 0 ; i < 4 ; i++ ) {
|
---|
422 | II (a, b, c, d, x[(int)(*pp++)], 6, *pc++);
|
---|
423 | II (d, a, b, c, x[(int)(*pp++)], 10, *pc++);
|
---|
424 | II (c, d, a, b, x[(int)(*pp++)], 15, *pc++);
|
---|
425 | II (b, c, d, a, x[(int)(*pp++)], 21, *pc++);
|
---|
426 | }
|
---|
427 | #else
|
---|
428 | /* Round 1 */
|
---|
429 | #define S11 7
|
---|
430 | #define S12 12
|
---|
431 | #define S13 17
|
---|
432 | #define S14 22
|
---|
433 | FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
|
---|
434 | FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
|
---|
435 | FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
|
---|
436 | FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
|
---|
437 | FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
|
---|
438 | FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
|
---|
439 | FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
|
---|
440 | FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
|
---|
441 | FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
|
---|
442 | FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
|
---|
443 | FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
|
---|
444 | FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
|
---|
445 | FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
|
---|
446 | FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
|
---|
447 | FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
|
---|
448 | FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
|
---|
449 |
|
---|
450 | /* Round 2 */
|
---|
451 | #define S21 5
|
---|
452 | #define S22 9
|
---|
453 | #define S23 14
|
---|
454 | #define S24 20
|
---|
455 | GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
|
---|
456 | GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
|
---|
457 | GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
|
---|
458 | GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
|
---|
459 | GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
|
---|
460 | GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */
|
---|
461 | GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
|
---|
462 | GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
|
---|
463 | GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
|
---|
464 | GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
|
---|
465 | GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
|
---|
466 | GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
|
---|
467 | GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
|
---|
468 | GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
|
---|
469 | GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
|
---|
470 | GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
|
---|
471 |
|
---|
472 | /* Round 3 */
|
---|
473 | #define S31 4
|
---|
474 | #define S32 11
|
---|
475 | #define S33 16
|
---|
476 | #define S34 23
|
---|
477 | HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
|
---|
478 | HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
|
---|
479 | HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
|
---|
480 | HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
|
---|
481 | HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
|
---|
482 | HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
|
---|
483 | HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
|
---|
484 | HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
|
---|
485 | HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
|
---|
486 | HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
|
---|
487 | HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
|
---|
488 | HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
|
---|
489 | HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
|
---|
490 | HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
|
---|
491 | HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
|
---|
492 | HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
|
---|
493 |
|
---|
494 | /* Round 4 */
|
---|
495 | #define S41 6
|
---|
496 | #define S42 10
|
---|
497 | #define S43 15
|
---|
498 | #define S44 21
|
---|
499 | II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
|
---|
500 | II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
|
---|
501 | II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
|
---|
502 | II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
|
---|
503 | II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
|
---|
504 | II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
|
---|
505 | II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
|
---|
506 | II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
|
---|
507 | II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
|
---|
508 | II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
|
---|
509 | II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
|
---|
510 | II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
|
---|
511 | II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
|
---|
512 | II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
|
---|
513 | II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
|
---|
514 | II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
|
---|
515 | #endif
|
---|
516 |
|
---|
517 | state[0] += a;
|
---|
518 | state[1] += b;
|
---|
519 | state[2] += c;
|
---|
520 | state[3] += d;
|
---|
521 |
|
---|
522 | /* Zeroize sensitive information. */
|
---|
523 | memset ((void *)x, 0, sizeof (x));
|
---|
524 | }
|
---|
525 |
|
---|
526 |
|
---|
527 | static void __md5_to64( char *s, unsigned long v, int n)
|
---|
528 | {
|
---|
529 | while (--n >= 0) {
|
---|
530 | *s++ = __md5_itoa64[v&0x3f];
|
---|
531 | v >>= 6;
|
---|
532 | }
|
---|
533 | }
|
---|
534 |
|
---|
535 | /*
|
---|
536 | * UNIX password
|
---|
537 | *
|
---|
538 | * Use MD5 for what it is best at...
|
---|
539 | */
|
---|
540 |
|
---|
541 | char * __md5_crypt( const char *pw, const char *salt, char *passwd )
|
---|
542 | {
|
---|
543 | /* Static stuff */
|
---|
544 | static const char *sp, *ep;
|
---|
545 | static char *p;
|
---|
546 |
|
---|
547 | unsigned char final[17]; /* final[16] exists only to aid in looping */
|
---|
548 | int sl,pl,i,__md5__magic_len,pw_len;
|
---|
549 | struct MD5Context ctx,ctx1;
|
---|
550 | unsigned long l;
|
---|
551 |
|
---|
552 | /* Refine the Salt first */
|
---|
553 | sp = salt;
|
---|
554 |
|
---|
555 | /* If it starts with the magic string, then skip that */
|
---|
556 | __md5__magic_len = strlen(__md5__magic);
|
---|
557 | if(!strncmp(sp,__md5__magic,__md5__magic_len))
|
---|
558 | sp += __md5__magic_len;
|
---|
559 |
|
---|
560 | /* It stops at the first '$', max 8 chars */
|
---|
561 | for(ep=sp;*ep && *ep != '$' && ep < (sp+8);ep++)
|
---|
562 | continue;
|
---|
563 |
|
---|
564 | /* get the length of the true salt */
|
---|
565 | sl = ep - sp;
|
---|
566 |
|
---|
567 | __md5_Init(&ctx);
|
---|
568 |
|
---|
569 | /* The password first, since that is what is most unknown */
|
---|
570 | pw_len = strlen(pw);
|
---|
571 | __md5_Update(&ctx,(const unsigned char *)pw,pw_len);
|
---|
572 |
|
---|
573 | /* Then our magic string */
|
---|
574 | __md5_Update(&ctx,(const unsigned char *)__md5__magic,__md5__magic_len);
|
---|
575 |
|
---|
576 | /* Then the raw salt */
|
---|
577 | __md5_Update(&ctx,(const unsigned char *)sp,sl);
|
---|
578 |
|
---|
579 | /* Then just as many characters of the MD5(pw,salt,pw) */
|
---|
580 | __md5_Init(&ctx1);
|
---|
581 | __md5_Update(&ctx1,(const unsigned char *)pw,pw_len);
|
---|
582 | __md5_Update(&ctx1,(const unsigned char *)sp,sl);
|
---|
583 | __md5_Update(&ctx1,(const unsigned char *)pw,pw_len);
|
---|
584 | __md5_Final(final,&ctx1);
|
---|
585 | for(pl = pw_len; pl > 0; pl -= 16)
|
---|
586 | __md5_Update(&ctx,(const unsigned char *)final,pl>16 ? 16 : pl);
|
---|
587 |
|
---|
588 | /* Don't leave anything around in vm they could use. */
|
---|
589 | memset(final,0,sizeof final);
|
---|
590 |
|
---|
591 | /* Then something really weird... */
|
---|
592 | for (i = pw_len; i ; i >>= 1) {
|
---|
593 | __md5_Update(&ctx, ((i&1) ? final : (const unsigned char *) pw), 1);
|
---|
594 | }
|
---|
595 |
|
---|
596 | /* Now make the output string */
|
---|
597 | strcpy(passwd,__md5__magic);
|
---|
598 | strncat(passwd,sp,sl);
|
---|
599 | strcat(passwd,"$");
|
---|
600 |
|
---|
601 | __md5_Final(final,&ctx);
|
---|
602 |
|
---|
603 | /*
|
---|
604 | * and now, just to make sure things don't run too fast
|
---|
605 | * On a 60 Mhz Pentium this takes 34 msec, so you would
|
---|
606 | * need 30 seconds to build a 1000 entry dictionary...
|
---|
607 | */
|
---|
608 | for(i=0;i<1000;i++) {
|
---|
609 | __md5_Init(&ctx1);
|
---|
610 | if(i & 1)
|
---|
611 | __md5_Update(&ctx1,(const unsigned char *)pw,pw_len);
|
---|
612 | else
|
---|
613 | __md5_Update(&ctx1,(const unsigned char *)final,16);
|
---|
614 |
|
---|
615 | if(i % 3)
|
---|
616 | __md5_Update(&ctx1,(const unsigned char *)sp,sl);
|
---|
617 |
|
---|
618 | if(i % 7)
|
---|
619 | __md5_Update(&ctx1,(const unsigned char *)pw,pw_len);
|
---|
620 |
|
---|
621 | if(i & 1)
|
---|
622 | __md5_Update(&ctx1,(const unsigned char *)final,16);
|
---|
623 | else
|
---|
624 | __md5_Update(&ctx1,(const unsigned char *)pw,pw_len);
|
---|
625 | __md5_Final(final,&ctx1);
|
---|
626 | }
|
---|
627 |
|
---|
628 | p = passwd + strlen(passwd);
|
---|
629 |
|
---|
630 | final[16] = final[5];
|
---|
631 | for ( i=0 ; i < 5 ; i++ ) {
|
---|
632 | l = (final[i]<<16) | (final[i+6]<<8) | final[i+12];
|
---|
633 | __md5_to64(p,l,4); p += 4;
|
---|
634 | }
|
---|
635 | l = final[11];
|
---|
636 | __md5_to64(p,l,2); p += 2;
|
---|
637 | *p = '\0';
|
---|
638 |
|
---|
639 | /* Don't leave anything around in vm they could use. */
|
---|
640 | memset(final,0,sizeof final);
|
---|
641 |
|
---|
642 | return passwd;
|
---|
643 | }
|
---|
644 |
|
---|
645 | unsigned char *MD5(const unsigned char *d, unsigned long n, unsigned char *md)
|
---|
646 | {
|
---|
647 | struct MD5Context c;
|
---|
648 | static unsigned char m[MD5_DIGEST_LENGTH];
|
---|
649 |
|
---|
650 | if (md == NULL) md=m;
|
---|
651 | __md5_Init(&c);
|
---|
652 | #ifndef CHARSET_EBCDIC
|
---|
653 | __md5_Update(&c,d,n);
|
---|
654 | #else
|
---|
655 | {
|
---|
656 | char temp[1024];
|
---|
657 | unsigned long chunk;
|
---|
658 |
|
---|
659 | while (n > 0)
|
---|
660 | {
|
---|
661 | chunk = (n > sizeof(temp)) ? sizeof(temp) : n;
|
---|
662 | ebcdic2ascii(temp, d, chunk);
|
---|
663 | __md5_Update(&c,d,n);
|
---|
664 | n -= chunk;
|
---|
665 | d += chunk;
|
---|
666 | }
|
---|
667 | }
|
---|
668 | #endif
|
---|
669 | __md5_Final(md,&c);
|
---|
670 | memset(&c,0,sizeof(c)); /* security consideration */
|
---|
671 | return(md);
|
---|
672 | }
|
---|
673 |
|
---|