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1 /* crypto/des/set_key.c */ |
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2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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3 * All rights reserved. |
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4 * |
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5 * This package is an SSL implementation written |
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6 * by Eric Young (eay@cryptsoft.com). |
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7 * The implementation was written so as to conform with Netscapes SSL. |
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8 * |
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9 * This library is free for commercial and non-commercial use as long as |
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10 * the following conditions are aheared to. The following conditions |
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11 * apply to all code found in this distribution, be it the RC4, RSA, |
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12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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13 * included with this distribution is covered by the same copyright terms |
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14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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15 * |
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16 * Copyright remains Eric Young's, and as such any Copyright notices in |
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17 * the code are not to be removed. |
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18 * If this package is used in a product, Eric Young should be given attribution |
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19 * as the author of the parts of the library used. |
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20 * This can be in the form of a textual message at program startup or |
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21 * in documentation (online or textual) provided with the package. |
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22 * |
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23 * Redistribution and use in source and binary forms, with or without |
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24 * modification, are permitted provided that the following conditions |
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25 * are met: |
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26 * 1. Redistributions of source code must retain the copyright |
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27 * notice, this list of conditions and the following disclaimer. |
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28 * 2. Redistributions in binary form must reproduce the above copyright |
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29 * notice, this list of conditions and the following disclaimer in the |
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30 * documentation and/or other materials provided with the distribution. |
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31 * 3. All advertising materials mentioning features or use of this software |
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32 * must display the following acknowledgement: |
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33 * "This product includes cryptographic software written by |
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34 * Eric Young (eay@cryptsoft.com)" |
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35 * The word 'cryptographic' can be left out if the rouines from the library |
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36 * being used are not cryptographic related :-). |
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37 * 4. If you include any Windows specific code (or a derivative thereof) from |
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38 * the apps directory (application code) you must include an acknowledgement: |
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39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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40 * |
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41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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51 * SUCH DAMAGE. |
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52 * |
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53 * The licence and distribution terms for any publically available version or |
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54 * derivative of this code cannot be changed. i.e. this code cannot simply be |
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55 * copied and put under another distribution licence |
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56 * [including the GNU Public Licence.] |
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57 */ |
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58 /* |
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59 © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
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60 */ |
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61 |
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62 |
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63 |
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64 /* set_key.c v 1.4 eay 24/9/91 |
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65 * 1.4 Speed up by 400% :-) |
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66 * 1.3 added register declarations. |
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67 * 1.2 unrolled make_key_sched a bit more |
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68 * 1.1 added norm_expand_bits |
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69 * 1.0 First working version |
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70 */ |
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71 #include "des_locl.h" |
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72 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__))) |
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73 #include "libcrypto_wsd_macros.h" |
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74 #include "libcrypto_wsd.h" |
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75 #endif |
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76 |
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77 #ifndef EMULATOR |
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78 OPENSSL_IMPLEMENT_GLOBAL(int,DES_check_key); /* defaults to false */ |
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79 #else |
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80 #define DES_check_key libcrypto_ImpurePtr()->_shadow_DES_check_key |
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81 #endif |
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82 static const unsigned char odd_parity[256]={ |
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83 1, 1, 2, 2, 4, 4, 7, 7, 8, 8, 11, 11, 13, 13, 14, 14, |
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84 16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31, |
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85 32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47, |
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86 49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62, |
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87 64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79, |
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88 81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94, |
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89 97, 97, 98, 98,100,100,103,103,104,104,107,107,109,109,110,110, |
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90 112,112,115,115,117,117,118,118,121,121,122,122,124,124,127,127, |
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91 128,128,131,131,133,133,134,134,137,137,138,138,140,140,143,143, |
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92 145,145,146,146,148,148,151,151,152,152,155,155,157,157,158,158, |
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93 161,161,162,162,164,164,167,167,168,168,171,171,173,173,174,174, |
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94 176,176,179,179,181,181,182,182,185,185,186,186,188,188,191,191, |
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95 193,193,194,194,196,196,199,199,200,200,203,203,205,205,206,206, |
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96 208,208,211,211,213,213,214,214,217,217,218,218,220,220,223,223, |
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97 224,224,227,227,229,229,230,230,233,233,234,234,236,236,239,239, |
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98 241,241,242,242,244,244,247,247,248,248,251,251,253,253,254,254}; |
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99 |
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100 EXPORT_C void DES_set_odd_parity(DES_cblock *key) |
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101 { |
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102 unsigned int i; |
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103 |
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104 for (i=0; i<DES_KEY_SZ; i++) |
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105 (*key)[i]=odd_parity[(*key)[i]]; |
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106 } |
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107 |
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108 EXPORT_C int DES_check_key_parity(const_DES_cblock *key) |
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109 { |
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110 unsigned int i; |
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111 |
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112 for (i=0; i<DES_KEY_SZ; i++) |
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113 { |
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114 if ((*key)[i] != odd_parity[(*key)[i]]) |
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115 return(0); |
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116 } |
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117 return(1); |
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118 } |
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119 |
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120 /* Weak and semi week keys as take from |
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121 * %A D.W. Davies |
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122 * %A W.L. Price |
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123 * %T Security for Computer Networks |
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124 * %I John Wiley & Sons |
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125 * %D 1984 |
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126 * Many thanks to smb@ulysses.att.com (Steven Bellovin) for the reference |
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127 * (and actual cblock values). |
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128 */ |
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129 #define NUM_WEAK_KEY 16 |
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130 #ifndef EMULATOR |
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131 static DES_cblock weak_keys[NUM_WEAK_KEY]={ |
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132 /* weak keys */ |
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133 {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01}, |
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134 {0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE}, |
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135 {0x1F,0x1F,0x1F,0x1F,0x0E,0x0E,0x0E,0x0E}, |
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136 {0xE0,0xE0,0xE0,0xE0,0xF1,0xF1,0xF1,0xF1}, |
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137 /* semi-weak keys */ |
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138 {0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE}, |
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139 {0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01}, |
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140 {0x1F,0xE0,0x1F,0xE0,0x0E,0xF1,0x0E,0xF1}, |
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141 {0xE0,0x1F,0xE0,0x1F,0xF1,0x0E,0xF1,0x0E}, |
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142 {0x01,0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1}, |
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143 {0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1,0x01}, |
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144 {0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E,0xFE}, |
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145 {0xFE,0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E}, |
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146 {0x01,0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E}, |
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147 {0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E,0x01}, |
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148 {0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1,0xFE}, |
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149 {0xFE,0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1}}; |
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150 #else |
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151 const DES_cblock temp_weak_keys[NUM_WEAK_KEY]={ |
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152 /* weak keys */ |
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153 {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01}, |
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154 {0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE}, |
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155 {0x1F,0x1F,0x1F,0x1F,0x0E,0x0E,0x0E,0x0E}, |
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156 {0xE0,0xE0,0xE0,0xE0,0xF1,0xF1,0xF1,0xF1}, |
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157 /* semi-weak keys */ |
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158 {0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE}, |
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159 {0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01}, |
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160 {0x1F,0xE0,0x1F,0xE0,0x0E,0xF1,0x0E,0xF1}, |
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161 {0xE0,0x1F,0xE0,0x1F,0xF1,0x0E,0xF1,0x0E}, |
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162 {0x01,0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1}, |
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163 {0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1,0x01}, |
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164 {0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E,0xFE}, |
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165 {0xFE,0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E}, |
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166 {0x01,0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E}, |
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167 {0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E,0x01}, |
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168 {0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1,0xFE}, |
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169 {0xFE,0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1}}; |
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170 |
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171 GET_STATIC_ARRAY_FROM_TLS(weak_keys,set_key_c,DES_cblock) |
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172 #define weak_keys (GET_WSD_VAR_NAME(weak_keys,set_key_c, s)()) |
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173 #endif |
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174 |
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175 EXPORT_C int DES_is_weak_key(const_DES_cblock *key) |
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176 { |
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177 int i; |
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178 |
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179 for (i=0; i<NUM_WEAK_KEY; i++) |
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180 /* Added == 0 to comparison, I obviously don't run |
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181 * this section very often :-(, thanks to |
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182 * engineering@MorningStar.Com for the fix |
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183 * eay 93/06/29 |
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184 * Another problem, I was comparing only the first 4 |
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185 * bytes, 97/03/18 */ |
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186 if (memcmp(weak_keys[i],key,sizeof(DES_cblock)) == 0) return(1); |
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187 return(0); |
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188 } |
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189 |
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190 /* NOW DEFINED IN des_local.h |
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191 * See ecb_encrypt.c for a pseudo description of these macros. |
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192 * #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ |
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193 * (b)^=(t),\ |
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194 * (a)=((a)^((t)<<(n)))) |
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195 */ |
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196 |
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197 #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ |
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198 (a)=(a)^(t)^(t>>(16-(n)))) |
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199 |
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200 static const DES_LONG des_skb[8][64]={ |
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201 { |
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202 /* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */ |
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203 0x00000000L,0x00000010L,0x20000000L,0x20000010L, |
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204 0x00010000L,0x00010010L,0x20010000L,0x20010010L, |
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205 0x00000800L,0x00000810L,0x20000800L,0x20000810L, |
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206 0x00010800L,0x00010810L,0x20010800L,0x20010810L, |
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207 0x00000020L,0x00000030L,0x20000020L,0x20000030L, |
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208 0x00010020L,0x00010030L,0x20010020L,0x20010030L, |
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209 0x00000820L,0x00000830L,0x20000820L,0x20000830L, |
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210 0x00010820L,0x00010830L,0x20010820L,0x20010830L, |
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211 0x00080000L,0x00080010L,0x20080000L,0x20080010L, |
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212 0x00090000L,0x00090010L,0x20090000L,0x20090010L, |
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213 0x00080800L,0x00080810L,0x20080800L,0x20080810L, |
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214 0x00090800L,0x00090810L,0x20090800L,0x20090810L, |
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215 0x00080020L,0x00080030L,0x20080020L,0x20080030L, |
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216 0x00090020L,0x00090030L,0x20090020L,0x20090030L, |
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217 0x00080820L,0x00080830L,0x20080820L,0x20080830L, |
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218 0x00090820L,0x00090830L,0x20090820L,0x20090830L, |
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219 },{ |
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220 /* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */ |
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221 0x00000000L,0x02000000L,0x00002000L,0x02002000L, |
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222 0x00200000L,0x02200000L,0x00202000L,0x02202000L, |
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223 0x00000004L,0x02000004L,0x00002004L,0x02002004L, |
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224 0x00200004L,0x02200004L,0x00202004L,0x02202004L, |
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225 0x00000400L,0x02000400L,0x00002400L,0x02002400L, |
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226 0x00200400L,0x02200400L,0x00202400L,0x02202400L, |
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227 0x00000404L,0x02000404L,0x00002404L,0x02002404L, |
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228 0x00200404L,0x02200404L,0x00202404L,0x02202404L, |
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229 0x10000000L,0x12000000L,0x10002000L,0x12002000L, |
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230 0x10200000L,0x12200000L,0x10202000L,0x12202000L, |
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231 0x10000004L,0x12000004L,0x10002004L,0x12002004L, |
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232 0x10200004L,0x12200004L,0x10202004L,0x12202004L, |
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233 0x10000400L,0x12000400L,0x10002400L,0x12002400L, |
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234 0x10200400L,0x12200400L,0x10202400L,0x12202400L, |
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235 0x10000404L,0x12000404L,0x10002404L,0x12002404L, |
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236 0x10200404L,0x12200404L,0x10202404L,0x12202404L, |
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237 },{ |
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238 /* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */ |
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239 0x00000000L,0x00000001L,0x00040000L,0x00040001L, |
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240 0x01000000L,0x01000001L,0x01040000L,0x01040001L, |
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241 0x00000002L,0x00000003L,0x00040002L,0x00040003L, |
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242 0x01000002L,0x01000003L,0x01040002L,0x01040003L, |
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243 0x00000200L,0x00000201L,0x00040200L,0x00040201L, |
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244 0x01000200L,0x01000201L,0x01040200L,0x01040201L, |
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245 0x00000202L,0x00000203L,0x00040202L,0x00040203L, |
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246 0x01000202L,0x01000203L,0x01040202L,0x01040203L, |
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247 0x08000000L,0x08000001L,0x08040000L,0x08040001L, |
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248 0x09000000L,0x09000001L,0x09040000L,0x09040001L, |
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249 0x08000002L,0x08000003L,0x08040002L,0x08040003L, |
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250 0x09000002L,0x09000003L,0x09040002L,0x09040003L, |
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251 0x08000200L,0x08000201L,0x08040200L,0x08040201L, |
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252 0x09000200L,0x09000201L,0x09040200L,0x09040201L, |
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253 0x08000202L,0x08000203L,0x08040202L,0x08040203L, |
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254 0x09000202L,0x09000203L,0x09040202L,0x09040203L, |
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255 },{ |
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256 /* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */ |
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257 0x00000000L,0x00100000L,0x00000100L,0x00100100L, |
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258 0x00000008L,0x00100008L,0x00000108L,0x00100108L, |
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259 0x00001000L,0x00101000L,0x00001100L,0x00101100L, |
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260 0x00001008L,0x00101008L,0x00001108L,0x00101108L, |
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261 0x04000000L,0x04100000L,0x04000100L,0x04100100L, |
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262 0x04000008L,0x04100008L,0x04000108L,0x04100108L, |
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263 0x04001000L,0x04101000L,0x04001100L,0x04101100L, |
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264 0x04001008L,0x04101008L,0x04001108L,0x04101108L, |
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265 0x00020000L,0x00120000L,0x00020100L,0x00120100L, |
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266 0x00020008L,0x00120008L,0x00020108L,0x00120108L, |
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267 0x00021000L,0x00121000L,0x00021100L,0x00121100L, |
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268 0x00021008L,0x00121008L,0x00021108L,0x00121108L, |
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269 0x04020000L,0x04120000L,0x04020100L,0x04120100L, |
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270 0x04020008L,0x04120008L,0x04020108L,0x04120108L, |
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271 0x04021000L,0x04121000L,0x04021100L,0x04121100L, |
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272 0x04021008L,0x04121008L,0x04021108L,0x04121108L, |
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273 },{ |
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274 /* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */ |
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275 0x00000000L,0x10000000L,0x00010000L,0x10010000L, |
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276 0x00000004L,0x10000004L,0x00010004L,0x10010004L, |
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277 0x20000000L,0x30000000L,0x20010000L,0x30010000L, |
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278 0x20000004L,0x30000004L,0x20010004L,0x30010004L, |
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279 0x00100000L,0x10100000L,0x00110000L,0x10110000L, |
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280 0x00100004L,0x10100004L,0x00110004L,0x10110004L, |
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281 0x20100000L,0x30100000L,0x20110000L,0x30110000L, |
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282 0x20100004L,0x30100004L,0x20110004L,0x30110004L, |
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283 0x00001000L,0x10001000L,0x00011000L,0x10011000L, |
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284 0x00001004L,0x10001004L,0x00011004L,0x10011004L, |
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285 0x20001000L,0x30001000L,0x20011000L,0x30011000L, |
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286 0x20001004L,0x30001004L,0x20011004L,0x30011004L, |
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287 0x00101000L,0x10101000L,0x00111000L,0x10111000L, |
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288 0x00101004L,0x10101004L,0x00111004L,0x10111004L, |
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289 0x20101000L,0x30101000L,0x20111000L,0x30111000L, |
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290 0x20101004L,0x30101004L,0x20111004L,0x30111004L, |
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291 },{ |
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292 /* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */ |
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293 0x00000000L,0x08000000L,0x00000008L,0x08000008L, |
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294 0x00000400L,0x08000400L,0x00000408L,0x08000408L, |
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295 0x00020000L,0x08020000L,0x00020008L,0x08020008L, |
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296 0x00020400L,0x08020400L,0x00020408L,0x08020408L, |
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297 0x00000001L,0x08000001L,0x00000009L,0x08000009L, |
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298 0x00000401L,0x08000401L,0x00000409L,0x08000409L, |
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299 0x00020001L,0x08020001L,0x00020009L,0x08020009L, |
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300 0x00020401L,0x08020401L,0x00020409L,0x08020409L, |
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301 0x02000000L,0x0A000000L,0x02000008L,0x0A000008L, |
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302 0x02000400L,0x0A000400L,0x02000408L,0x0A000408L, |
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303 0x02020000L,0x0A020000L,0x02020008L,0x0A020008L, |
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304 0x02020400L,0x0A020400L,0x02020408L,0x0A020408L, |
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305 0x02000001L,0x0A000001L,0x02000009L,0x0A000009L, |
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306 0x02000401L,0x0A000401L,0x02000409L,0x0A000409L, |
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307 0x02020001L,0x0A020001L,0x02020009L,0x0A020009L, |
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308 0x02020401L,0x0A020401L,0x02020409L,0x0A020409L, |
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309 },{ |
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310 /* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */ |
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311 0x00000000L,0x00000100L,0x00080000L,0x00080100L, |
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312 0x01000000L,0x01000100L,0x01080000L,0x01080100L, |
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313 0x00000010L,0x00000110L,0x00080010L,0x00080110L, |
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314 0x01000010L,0x01000110L,0x01080010L,0x01080110L, |
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315 0x00200000L,0x00200100L,0x00280000L,0x00280100L, |
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316 0x01200000L,0x01200100L,0x01280000L,0x01280100L, |
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317 0x00200010L,0x00200110L,0x00280010L,0x00280110L, |
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318 0x01200010L,0x01200110L,0x01280010L,0x01280110L, |
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319 0x00000200L,0x00000300L,0x00080200L,0x00080300L, |
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320 0x01000200L,0x01000300L,0x01080200L,0x01080300L, |
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321 0x00000210L,0x00000310L,0x00080210L,0x00080310L, |
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322 0x01000210L,0x01000310L,0x01080210L,0x01080310L, |
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323 0x00200200L,0x00200300L,0x00280200L,0x00280300L, |
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324 0x01200200L,0x01200300L,0x01280200L,0x01280300L, |
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325 0x00200210L,0x00200310L,0x00280210L,0x00280310L, |
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326 0x01200210L,0x01200310L,0x01280210L,0x01280310L, |
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327 },{ |
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328 /* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */ |
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329 0x00000000L,0x04000000L,0x00040000L,0x04040000L, |
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330 0x00000002L,0x04000002L,0x00040002L,0x04040002L, |
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331 0x00002000L,0x04002000L,0x00042000L,0x04042000L, |
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332 0x00002002L,0x04002002L,0x00042002L,0x04042002L, |
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333 0x00000020L,0x04000020L,0x00040020L,0x04040020L, |
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334 0x00000022L,0x04000022L,0x00040022L,0x04040022L, |
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335 0x00002020L,0x04002020L,0x00042020L,0x04042020L, |
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336 0x00002022L,0x04002022L,0x00042022L,0x04042022L, |
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337 0x00000800L,0x04000800L,0x00040800L,0x04040800L, |
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338 0x00000802L,0x04000802L,0x00040802L,0x04040802L, |
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339 0x00002800L,0x04002800L,0x00042800L,0x04042800L, |
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340 0x00002802L,0x04002802L,0x00042802L,0x04042802L, |
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341 0x00000820L,0x04000820L,0x00040820L,0x04040820L, |
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342 0x00000822L,0x04000822L,0x00040822L,0x04040822L, |
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343 0x00002820L,0x04002820L,0x00042820L,0x04042820L, |
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344 0x00002822L,0x04002822L,0x00042822L,0x04042822L, |
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345 }}; |
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346 |
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347 EXPORT_C int DES_set_key(const_DES_cblock *key, DES_key_schedule *schedule) |
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348 { |
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349 if (DES_check_key) |
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350 { |
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351 return DES_set_key_checked(key, schedule); |
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352 } |
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353 else |
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354 { |
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355 DES_set_key_unchecked(key, schedule); |
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356 return 0; |
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357 } |
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358 } |
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359 |
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360 /* return 0 if key parity is odd (correct), |
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361 * return -1 if key parity error, |
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362 * return -2 if illegal weak key. |
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363 */ |
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364 EXPORT_C int DES_set_key_checked(const_DES_cblock *key, DES_key_schedule *schedule) |
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365 { |
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366 if (!DES_check_key_parity(key)) |
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367 return(-1); |
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368 if (DES_is_weak_key(key)) |
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369 return(-2); |
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370 DES_set_key_unchecked(key, schedule); |
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371 return 0; |
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372 } |
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373 |
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374 EXPORT_C void DES_set_key_unchecked(const_DES_cblock *key, DES_key_schedule *schedule) |
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375 { |
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376 #ifndef EMULATOR |
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377 static int shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0}; |
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378 #else |
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379 static const int shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0}; |
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380 #endif |
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381 register DES_LONG c,d,t,s,t2; |
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382 register const unsigned char *in; |
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383 register DES_LONG *k; |
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384 register int i; |
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385 |
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386 #ifdef OPENBSD_DEV_CRYPTO |
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387 memcpy(schedule->key,key,sizeof schedule->key); |
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388 schedule->session=NULL; |
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389 #endif |
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390 k = &schedule->ks->deslong[0]; |
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391 in = &(*key)[0]; |
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392 |
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393 c2l(in,c); |
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394 c2l(in,d); |
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395 |
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396 /* do PC1 in 47 simple operations :-) |
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397 * Thanks to John Fletcher (john_fletcher@lccmail.ocf.llnl.gov) |
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398 * for the inspiration. :-) */ |
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399 PERM_OP (d,c,t,4,0x0f0f0f0fL); |
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400 HPERM_OP(c,t,-2,0xcccc0000L); |
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401 HPERM_OP(d,t,-2,0xcccc0000L); |
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402 PERM_OP (d,c,t,1,0x55555555L); |
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403 PERM_OP (c,d,t,8,0x00ff00ffL); |
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404 PERM_OP (d,c,t,1,0x55555555L); |
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405 d= (((d&0x000000ffL)<<16L)| (d&0x0000ff00L) | |
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406 ((d&0x00ff0000L)>>16L)|((c&0xf0000000L)>>4L)); |
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407 c&=0x0fffffffL; |
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408 |
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409 for (i=0; i<ITERATIONS; i++) |
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410 { |
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411 if (shifts2[i]) |
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412 { c=((c>>2L)|(c<<26L)); d=((d>>2L)|(d<<26L)); } |
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413 else |
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414 { c=((c>>1L)|(c<<27L)); d=((d>>1L)|(d<<27L)); } |
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415 c&=0x0fffffffL; |
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416 d&=0x0fffffffL; |
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417 /* could be a few less shifts but I am to lazy at this |
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418 * point in time to investigate */ |
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419 s= des_skb[0][ (c )&0x3f ]| |
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420 des_skb[1][((c>> 6L)&0x03)|((c>> 7L)&0x3c)]| |
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421 des_skb[2][((c>>13L)&0x0f)|((c>>14L)&0x30)]| |
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422 des_skb[3][((c>>20L)&0x01)|((c>>21L)&0x06) | |
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423 ((c>>22L)&0x38)]; |
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424 t= des_skb[4][ (d )&0x3f ]| |
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425 des_skb[5][((d>> 7L)&0x03)|((d>> 8L)&0x3c)]| |
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426 des_skb[6][ (d>>15L)&0x3f ]| |
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427 des_skb[7][((d>>21L)&0x0f)|((d>>22L)&0x30)]; |
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428 |
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429 /* table contained 0213 4657 */ |
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430 t2=((t<<16L)|(s&0x0000ffffL))&0xffffffffL; |
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431 *(k++)=ROTATE(t2,30)&0xffffffffL; |
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432 |
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433 t2=((s>>16L)|(t&0xffff0000L)); |
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434 *(k++)=ROTATE(t2,26)&0xffffffffL; |
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435 } |
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436 } |
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437 |
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438 EXPORT_C int DES_key_sched(const_DES_cblock *key, DES_key_schedule *schedule) |
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439 { |
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440 return(DES_set_key(key,schedule)); |
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441 } |
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442 /* |
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443 #undef des_fixup_key_parity |
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444 void des_fixup_key_parity(des_cblock *key) |
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445 { |
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446 des_set_odd_parity(key); |
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447 } |
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448 */ |