Mercurial > hg > early-roguelike
annotate rogue4/xcrypt.c @ 248:182e26224f92 rel2016.06
README.txt: additions and clarifications.
author | John "Elwin" Edwards |
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date | Sun, 29 May 2016 17:05:38 -0400 |
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rev | line source |
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1 /* |
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2 * FreeSec: libcrypt |
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3 * |
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4 * Copyright (C) 1994 David Burren |
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5 * All rights reserved. |
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6 * |
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7 * Redistribution and use in source and binary forms, with or without |
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8 * modification, are permitted provided that the following conditions |
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9 * are met: |
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10 * 1. Redistributions of source code must retain the above copyright |
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11 * notice, this list of conditions and the following disclaimer. |
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12 * 2. Redistributions in binary form must reproduce the above copyright |
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13 * notice, this list of conditions and the following disclaimer in the |
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14 * documentation and/or other materials provided with the distribution. |
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15 * 3. Neither the name(s) of the author(s) nor the names of other contributors |
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16 * may be used to endorse or promote products derived from this software |
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17 * without specific prior written permission. |
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18 * |
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19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTORS ``AS IS'' AND |
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20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTORS BE LIABLE |
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23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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29 * SUCH DAMAGE. |
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30 * |
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31 * |
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32 * This is an original implementation of the DES and the crypt(3) interfaces |
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33 * by David Burren <davidb@werj.com.au>. |
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34 * |
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35 * An excellent reference on the underlying algorithm (and related |
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36 * algorithms) is: |
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37 * |
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38 * B. Schneier, Applied Cryptography: protocols, algorithms, |
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39 * and source code in C, John Wiley & Sons, 1994. |
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40 * |
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41 * Note that in that book's description of DES the lookups for the initial, |
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42 * pbox, and final permutations are inverted (this has been brought to the |
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43 * attention of the author). A list of errata for this book has been |
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44 * posted to the sci.crypt newsgroup by the author and is available for FTP. |
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45 * |
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46 * NOTE: |
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47 * This file has a static version of des_setkey() so that crypt.o exports |
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48 * only the crypt() interface. This is required to make binaries linked |
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49 * against crypt.o exportable or re-exportable from the USA. |
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50 */ |
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51 |
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52 #include <sys/types.h> |
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53 #include <string.h> |
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54 |
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55 extern unsigned long int md_ntohl(unsigned long int x); |
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56 extern unsigned long int md_htonl(unsigned long int x); |
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57 |
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58 #define _PASSWORD_EFMT1 '_' |
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59 |
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60 static unsigned char IP[64] = { |
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61 58, 50, 42, 34, 26, 18, 10, 2, 60, 52, 44, 36, 28, 20, 12, 4, |
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62 62, 54, 46, 38, 30, 22, 14, 6, 64, 56, 48, 40, 32, 24, 16, 8, |
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63 57, 49, 41, 33, 25, 17, 9, 1, 59, 51, 43, 35, 27, 19, 11, 3, |
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64 61, 53, 45, 37, 29, 21, 13, 5, 63, 55, 47, 39, 31, 23, 15, 7 |
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65 }; |
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66 |
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67 static unsigned char inv_key_perm[64]; |
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68 static unsigned char key_perm[56] = { |
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69 57, 49, 41, 33, 25, 17, 9, 1, 58, 50, 42, 34, 26, 18, |
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70 10, 2, 59, 51, 43, 35, 27, 19, 11, 3, 60, 52, 44, 36, |
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71 63, 55, 47, 39, 31, 23, 15, 7, 62, 54, 46, 38, 30, 22, |
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72 14, 6, 61, 53, 45, 37, 29, 21, 13, 5, 28, 20, 12, 4 |
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73 }; |
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74 |
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75 static unsigned char key_shifts[16] = { |
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76 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 |
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77 }; |
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78 |
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79 static unsigned char inv_comp_perm[56]; |
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80 static unsigned char comp_perm[48] = { |
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81 14, 17, 11, 24, 1, 5, 3, 28, 15, 6, 21, 10, |
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82 23, 19, 12, 4, 26, 8, 16, 7, 27, 20, 13, 2, |
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83 41, 52, 31, 37, 47, 55, 30, 40, 51, 45, 33, 48, |
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84 44, 49, 39, 56, 34, 53, 46, 42, 50, 36, 29, 32 |
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85 }; |
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86 |
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87 /* |
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88 * No E box is used, as it's replaced by some ANDs, shifts, and ORs. |
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89 */ |
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90 |
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91 static unsigned char u_sbox[8][64]; |
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92 static unsigned char sbox[8][64] = { |
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93 { |
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94 14, 4, 13, 1, 2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7, |
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95 0, 15, 7, 4, 14, 2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8, |
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96 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 5, 0, |
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97 15, 12, 8, 2, 4, 9, 1, 7, 5, 11, 3, 14, 10, 0, 6, 13 |
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98 }, |
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99 { |
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100 15, 1, 8, 14, 6, 11, 3, 4, 9, 7, 2, 13, 12, 0, 5, 10, |
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101 3, 13, 4, 7, 15, 2, 8, 14, 12, 0, 1, 10, 6, 9, 11, 5, |
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102 0, 14, 7, 11, 10, 4, 13, 1, 5, 8, 12, 6, 9, 3, 2, 15, |
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103 13, 8, 10, 1, 3, 15, 4, 2, 11, 6, 7, 12, 0, 5, 14, 9 |
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104 }, |
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105 { |
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106 10, 0, 9, 14, 6, 3, 15, 5, 1, 13, 12, 7, 11, 4, 2, 8, |
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107 13, 7, 0, 9, 3, 4, 6, 10, 2, 8, 5, 14, 12, 11, 15, 1, |
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108 13, 6, 4, 9, 8, 15, 3, 0, 11, 1, 2, 12, 5, 10, 14, 7, |
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109 1, 10, 13, 0, 6, 9, 8, 7, 4, 15, 14, 3, 11, 5, 2, 12 |
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110 }, |
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111 { |
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112 7, 13, 14, 3, 0, 6, 9, 10, 1, 2, 8, 5, 11, 12, 4, 15, |
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113 13, 8, 11, 5, 6, 15, 0, 3, 4, 7, 2, 12, 1, 10, 14, 9, |
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114 10, 6, 9, 0, 12, 11, 7, 13, 15, 1, 3, 14, 5, 2, 8, 4, |
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115 3, 15, 0, 6, 10, 1, 13, 8, 9, 4, 5, 11, 12, 7, 2, 14 |
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116 }, |
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117 { |
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118 2, 12, 4, 1, 7, 10, 11, 6, 8, 5, 3, 15, 13, 0, 14, 9, |
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119 14, 11, 2, 12, 4, 7, 13, 1, 5, 0, 15, 10, 3, 9, 8, 6, |
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120 4, 2, 1, 11, 10, 13, 7, 8, 15, 9, 12, 5, 6, 3, 0, 14, |
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121 11, 8, 12, 7, 1, 14, 2, 13, 6, 15, 0, 9, 10, 4, 5, 3 |
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122 }, |
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123 { |
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124 12, 1, 10, 15, 9, 2, 6, 8, 0, 13, 3, 4, 14, 7, 5, 11, |
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125 10, 15, 4, 2, 7, 12, 9, 5, 6, 1, 13, 14, 0, 11, 3, 8, |
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126 9, 14, 15, 5, 2, 8, 12, 3, 7, 0, 4, 10, 1, 13, 11, 6, |
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127 4, 3, 2, 12, 9, 5, 15, 10, 11, 14, 1, 7, 6, 0, 8, 13 |
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128 }, |
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129 { |
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130 4, 11, 2, 14, 15, 0, 8, 13, 3, 12, 9, 7, 5, 10, 6, 1, |
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131 13, 0, 11, 7, 4, 9, 1, 10, 14, 3, 5, 12, 2, 15, 8, 6, |
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132 1, 4, 11, 13, 12, 3, 7, 14, 10, 15, 6, 8, 0, 5, 9, 2, |
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133 6, 11, 13, 8, 1, 4, 10, 7, 9, 5, 0, 15, 14, 2, 3, 12 |
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134 }, |
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135 { |
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136 13, 2, 8, 4, 6, 15, 11, 1, 10, 9, 3, 14, 5, 0, 12, 7, |
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137 1, 15, 13, 8, 10, 3, 7, 4, 12, 5, 6, 11, 0, 14, 9, 2, |
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138 7, 11, 4, 1, 9, 12, 14, 2, 0, 6, 10, 13, 15, 3, 5, 8, |
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139 2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11 |
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140 } |
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141 }; |
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142 |
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143 static unsigned char un_pbox[32]; |
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144 static unsigned char pbox[32] = { |
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145 16, 7, 20, 21, 29, 12, 28, 17, 1, 15, 23, 26, 5, 18, 31, 10, |
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146 2, 8, 24, 14, 32, 27, 3, 9, 19, 13, 30, 6, 22, 11, 4, 25 |
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147 }; |
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148 |
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149 static unsigned int bits32[32] = |
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150 { |
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151 0x80000000, 0x40000000, 0x20000000, 0x10000000, |
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152 0x08000000, 0x04000000, 0x02000000, 0x01000000, |
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153 0x00800000, 0x00400000, 0x00200000, 0x00100000, |
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154 0x00080000, 0x00040000, 0x00020000, 0x00010000, |
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155 0x00008000, 0x00004000, 0x00002000, 0x00001000, |
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156 0x00000800, 0x00000400, 0x00000200, 0x00000100, |
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157 0x00000080, 0x00000040, 0x00000020, 0x00000010, |
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158 0x00000008, 0x00000004, 0x00000002, 0x00000001 |
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159 }; |
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160 |
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161 static unsigned char bits8[8] = { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 }; |
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162 |
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163 static unsigned int saltbits; |
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164 static int old_salt; |
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165 static unsigned int *bits28, *bits24; |
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166 static unsigned char init_perm[64], final_perm[64]; |
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167 static unsigned int en_keysl[16], en_keysr[16]; |
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168 static unsigned int de_keysl[16], de_keysr[16]; |
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169 static int des_initialised = 0; |
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170 static unsigned char m_sbox[4][4096]; |
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171 static unsigned int psbox[4][256]; |
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172 static unsigned int ip_maskl[8][256], ip_maskr[8][256]; |
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173 static unsigned int fp_maskl[8][256], fp_maskr[8][256]; |
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174 static unsigned int key_perm_maskl[8][128], key_perm_maskr[8][128]; |
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175 static unsigned int comp_maskl[8][128], comp_maskr[8][128]; |
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176 static unsigned int old_rawkey0, old_rawkey1; |
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177 |
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178 static unsigned char ascii64[] = |
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179 "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; |
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180 /* 0000000000111111111122222222223333333333444444444455555555556666 */ |
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181 /* 0123456789012345678901234567890123456789012345678901234567890123 */ |
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182 |
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183 static __inline int |
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184 ascii_to_bin(char ch) |
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185 { |
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186 if (ch > 'z') |
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187 return(0); |
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188 if (ch >= 'a') |
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189 return(ch - 'a' + 38); |
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190 if (ch > 'Z') |
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191 return(0); |
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192 if (ch >= 'A') |
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193 return(ch - 'A' + 12); |
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194 if (ch > '9') |
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195 return(0); |
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196 if (ch >= '.') |
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197 return(ch - '.'); |
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198 return(0); |
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199 } |
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200 |
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201 static void |
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202 des_init() |
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203 { |
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204 int i, j, b, k, inbit, obit; |
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205 unsigned int *p, *il, *ir, *fl, *fr; |
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206 |
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207 old_rawkey0 = old_rawkey1 = 0; |
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208 saltbits = 0; |
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209 old_salt = 0; |
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210 bits24 = (bits28 = bits32 + 4) + 4; |
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211 |
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212 /* |
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213 * Invert the S-boxes, reordering the input bits. |
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214 */ |
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215 for (i = 0; i < 8; i++) |
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216 for (j = 0; j < 64; j++) { |
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217 b = (j & 0x20) | ((j & 1) << 4) | ((j >> 1) & 0xf); |
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218 u_sbox[i][j] = sbox[i][b]; |
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219 } |
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220 |
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221 /* |
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222 * Convert the inverted S-boxes into 4 arrays of 8 bits. |
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223 * Each will handle 12 bits of the S-box input. |
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224 */ |
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225 for (b = 0; b < 4; b++) |
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226 for (i = 0; i < 64; i++) |
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227 for (j = 0; j < 64; j++) |
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228 m_sbox[b][(i << 6) | j] = |
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229 (u_sbox[(b << 1)][i] << 4) | |
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230 u_sbox[(b << 1) + 1][j]; |
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231 |
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232 /* |
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233 * Set up the initial & final permutations into a useful form, and |
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234 * initialise the inverted key permutation. |
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235 */ |
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236 for (i = 0; i < 64; i++) { |
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237 init_perm[final_perm[i] = IP[i] - 1] = i; |
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238 inv_key_perm[i] = 255; |
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239 } |
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240 |
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241 /* |
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242 * Invert the key permutation and initialise the inverted key |
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243 * compression permutation. |
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244 */ |
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245 for (i = 0; i < 56; i++) { |
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246 inv_key_perm[key_perm[i] - 1] = i; |
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247 inv_comp_perm[i] = 255; |
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248 } |
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249 |
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250 /* |
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251 * Invert the key compression permutation. |
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252 */ |
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253 for (i = 0; i < 48; i++) { |
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254 inv_comp_perm[comp_perm[i] - 1] = i; |
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255 } |
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256 |
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257 /* |
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258 * Set up the OR-mask arrays for the initial and final permutations, |
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259 * and for the key initial and compression permutations. |
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260 */ |
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261 for (k = 0; k < 8; k++) { |
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262 for (i = 0; i < 256; i++) { |
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263 *(il = &ip_maskl[k][i]) = 0; |
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264 *(ir = &ip_maskr[k][i]) = 0; |
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265 *(fl = &fp_maskl[k][i]) = 0; |
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266 *(fr = &fp_maskr[k][i]) = 0; |
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267 for (j = 0; j < 8; j++) { |
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268 inbit = 8 * k + j; |
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269 if (i & bits8[j]) { |
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270 if ((obit = init_perm[inbit]) < 32) |
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271 *il |= bits32[obit]; |
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272 else |
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273 *ir |= bits32[obit-32]; |
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274 if ((obit = final_perm[inbit]) < 32) |
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275 *fl |= bits32[obit]; |
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276 else |
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277 *fr |= bits32[obit - 32]; |
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278 } |
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279 } |
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280 } |
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281 for (i = 0; i < 128; i++) { |
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282 *(il = &key_perm_maskl[k][i]) = 0; |
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283 *(ir = &key_perm_maskr[k][i]) = 0; |
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284 for (j = 0; j < 7; j++) { |
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285 inbit = 8 * k + j; |
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286 if (i & bits8[j + 1]) { |
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287 if ((obit = inv_key_perm[inbit]) == 255) |
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288 continue; |
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289 if (obit < 28) |
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290 *il |= bits28[obit]; |
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291 else |
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292 *ir |= bits28[obit - 28]; |
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293 } |
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294 } |
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295 *(il = &comp_maskl[k][i]) = 0; |
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296 *(ir = &comp_maskr[k][i]) = 0; |
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297 for (j = 0; j < 7; j++) { |
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298 inbit = 7 * k + j; |
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299 if (i & bits8[j + 1]) { |
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300 if ((obit=inv_comp_perm[inbit]) == 255) |
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301 continue; |
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302 if (obit < 24) |
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303 *il |= bits24[obit]; |
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304 else |
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305 *ir |= bits24[obit - 24]; |
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306 } |
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307 } |
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308 } |
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309 } |
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310 |
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311 /* |
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312 * Invert the P-box permutation, and convert into OR-masks for |
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313 * handling the output of the S-box arrays setup above. |
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314 */ |
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315 for (i = 0; i < 32; i++) |
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316 un_pbox[pbox[i] - 1] = i; |
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317 |
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318 for (b = 0; b < 4; b++) |
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319 for (i = 0; i < 256; i++) { |
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320 *(p = &psbox[b][i]) = 0; |
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321 for (j = 0; j < 8; j++) { |
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322 if (i & bits8[j]) |
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323 *p |= bits32[un_pbox[8 * b + j]]; |
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324 } |
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325 } |
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326 |
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327 des_initialised = 1; |
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328 } |
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329 |
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330 static void |
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331 setup_salt(int salt) |
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332 { |
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333 unsigned int obit, saltbit; |
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334 int i; |
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335 |
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336 if (salt == old_salt) |
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337 return; |
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338 old_salt = salt; |
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339 |
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340 saltbits = 0; |
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341 saltbit = 1; |
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342 obit = 0x800000; |
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343 for (i = 0; i < 24; i++) { |
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344 if (salt & saltbit) |
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345 saltbits |= obit; |
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346 saltbit <<= 1; |
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347 obit >>= 1; |
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348 } |
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349 } |
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350 |
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351 static int |
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352 des_setkey(const unsigned char *key) |
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353 { |
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354 unsigned int k0, k1, rawkey0, rawkey1; |
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355 int shifts, round; |
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|
356 |
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357 if (!des_initialised) |
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358 des_init(); |
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359 |
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360 rawkey0 = md_ntohl(*(unsigned int *) key); |
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361 rawkey1 = md_ntohl(*(unsigned int *) (key + 4)); |
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362 |
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363 if ((rawkey0 | rawkey1) |
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364 && rawkey0 == old_rawkey0 |
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365 && rawkey1 == old_rawkey1) { |
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366 /* |
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367 * Already setup for this key. |
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368 * This optimisation fails on a zero key (which is weak and |
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369 * has bad parity anyway) in order to simplify the starting |
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370 * conditions. |
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371 */ |
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372 return(0); |
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373 } |
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374 old_rawkey0 = rawkey0; |
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375 old_rawkey1 = rawkey1; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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376 |
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377 /* |
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378 * Do key permutation and split into two 28-bit subkeys. |
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|
379 */ |
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|
380 k0 = key_perm_maskl[0][rawkey0 >> 25] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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381 | key_perm_maskl[1][(rawkey0 >> 17) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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382 | key_perm_maskl[2][(rawkey0 >> 9) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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383 | key_perm_maskl[3][(rawkey0 >> 1) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
384 | key_perm_maskl[4][rawkey1 >> 25] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
385 | key_perm_maskl[5][(rawkey1 >> 17) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
386 | key_perm_maskl[6][(rawkey1 >> 9) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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387 | key_perm_maskl[7][(rawkey1 >> 1) & 0x7f]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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388 k1 = key_perm_maskr[0][rawkey0 >> 25] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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389 | key_perm_maskr[1][(rawkey0 >> 17) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
390 | key_perm_maskr[2][(rawkey0 >> 9) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
391 | key_perm_maskr[3][(rawkey0 >> 1) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
392 | key_perm_maskr[4][rawkey1 >> 25] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
393 | key_perm_maskr[5][(rawkey1 >> 17) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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394 | key_perm_maskr[6][(rawkey1 >> 9) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
395 | key_perm_maskr[7][(rawkey1 >> 1) & 0x7f]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
396 /* |
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|
397 * Rotate subkeys and do compression permutation. |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
398 */ |
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|
399 shifts = 0; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
400 for (round = 0; round < 16; round++) { |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
401 unsigned int t0, t1; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
402 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
403 shifts += key_shifts[round]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
404 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
405 t0 = (k0 << shifts) | (k0 >> (28 - shifts)); |
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|
406 t1 = (k1 << shifts) | (k1 >> (28 - shifts)); |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
407 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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408 de_keysl[15 - round] = |
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409 en_keysl[round] = comp_maskl[0][(t0 >> 21) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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410 | comp_maskl[1][(t0 >> 14) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
411 | comp_maskl[2][(t0 >> 7) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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412 | comp_maskl[3][t0 & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
413 | comp_maskl[4][(t1 >> 21) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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414 | comp_maskl[5][(t1 >> 14) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
415 | comp_maskl[6][(t1 >> 7) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
416 | comp_maskl[7][t1 & 0x7f]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
417 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
418 de_keysr[15 - round] = |
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419 en_keysr[round] = comp_maskr[0][(t0 >> 21) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
420 | comp_maskr[1][(t0 >> 14) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
421 | comp_maskr[2][(t0 >> 7) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
422 | comp_maskr[3][t0 & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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423 | comp_maskr[4][(t1 >> 21) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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424 | comp_maskr[5][(t1 >> 14) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
425 | comp_maskr[6][(t1 >> 7) & 0x7f] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
426 | comp_maskr[7][t1 & 0x7f]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
427 } |
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428 return(0); |
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429 } |
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430 |
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431 static int |
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432 do_des(unsigned int l_in, unsigned int r_in, unsigned int *l_out, |
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433 unsigned int *r_out, int count) |
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434 { |
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435 /* |
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436 * l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format. |
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437 */ |
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438 unsigned int l, r, *kl, *kr, *kl1, *kr1; |
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439 unsigned int f = 0, r48l, r48r; |
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440 int round; |
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441 |
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442 if (count == 0) { |
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443 return(1); |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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444 } else if (count > 0) { |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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445 /* |
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446 * Encrypting |
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447 */ |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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448 kl1 = en_keysl; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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449 kr1 = en_keysr; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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450 } else { |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
451 /* |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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452 * Decrypting |
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453 */ |
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454 count = -count; |
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455 kl1 = de_keysl; |
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|
456 kr1 = de_keysr; |
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|
457 } |
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|
458 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
459 /* |
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|
460 * Do initial permutation (IP). |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
461 */ |
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462 l = ip_maskl[0][l_in >> 24] |
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|
463 | ip_maskl[1][(l_in >> 16) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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464 | ip_maskl[2][(l_in >> 8) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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465 | ip_maskl[3][l_in & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
466 | ip_maskl[4][r_in >> 24] |
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467 | ip_maskl[5][(r_in >> 16) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
468 | ip_maskl[6][(r_in >> 8) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
469 | ip_maskl[7][r_in & 0xff]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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470 r = ip_maskr[0][l_in >> 24] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
471 | ip_maskr[1][(l_in >> 16) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
472 | ip_maskr[2][(l_in >> 8) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
473 | ip_maskr[3][l_in & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
474 | ip_maskr[4][r_in >> 24] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
475 | ip_maskr[5][(r_in >> 16) & 0xff] |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
476 | ip_maskr[6][(r_in >> 8) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
477 | ip_maskr[7][r_in & 0xff]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
478 |
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|
479 while (count--) { |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
480 /* |
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|
481 * Do each round. |
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diff
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|
482 */ |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
483 kl = kl1; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
484 kr = kr1; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
485 round = 16; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
486 while (round--) { |
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|
487 /* |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
488 * Expand R to 48 bits (simulate the E-box). |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
489 */ |
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|
490 r48l = ((r & 0x00000001) << 23) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
491 | ((r & 0xf8000000) >> 9) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
492 | ((r & 0x1f800000) >> 11) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
493 | ((r & 0x01f80000) >> 13) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
494 | ((r & 0x001f8000) >> 15); |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
495 |
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|
496 r48r = ((r & 0x0001f800) << 7) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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497 | ((r & 0x00001f80) << 5) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
498 | ((r & 0x000001f8) << 3) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
499 | ((r & 0x0000001f) << 1) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
500 | ((r & 0x80000000) >> 31); |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
501 /* |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
502 * Do salting for crypt() and friends, and |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
503 * XOR with the permuted key. |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
504 */ |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
changeset
|
505 f = (r48l ^ r48r) & saltbits; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
506 r48l ^= f ^ *kl++; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
507 r48r ^= f ^ *kr++; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
508 /* |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
509 * Do sbox lookups (which shrink it back to 32 bits) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
510 * and do the pbox permutation at the same time. |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
511 */ |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
512 f = psbox[0][m_sbox[0][r48l >> 12]] |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
513 | psbox[1][m_sbox[1][r48l & 0xfff]] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
514 | psbox[2][m_sbox[2][r48r >> 12]] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
515 | psbox[3][m_sbox[3][r48r & 0xfff]]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
516 /* |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
517 * Now that we've permuted things, complete f(). |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
518 */ |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
519 f ^= l; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
520 l = r; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
521 r = f; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
522 } |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
523 r = l; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
524 l = f; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
525 } |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
526 /* |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
527 * Do final permutation (inverse of IP). |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
528 */ |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
529 *l_out = fp_maskl[0][l >> 24] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
530 | fp_maskl[1][(l >> 16) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
531 | fp_maskl[2][(l >> 8) & 0xff] |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
532 | fp_maskl[3][l & 0xff] |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
533 | fp_maskl[4][r >> 24] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
534 | fp_maskl[5][(r >> 16) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
535 | fp_maskl[6][(r >> 8) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
536 | fp_maskl[7][r & 0xff]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
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|
537 *r_out = fp_maskr[0][l >> 24] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
538 | fp_maskr[1][(l >> 16) & 0xff] |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
539 | fp_maskr[2][(l >> 8) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
540 | fp_maskr[3][l & 0xff] |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
541 | fp_maskr[4][r >> 24] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
542 | fp_maskr[5][(r >> 16) & 0xff] |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
543 | fp_maskr[6][(r >> 8) & 0xff] |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
544 | fp_maskr[7][r & 0xff]; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
545 return(0); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
546 } |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
547 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
548 static int |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
549 des_cipher(const unsigned char *in, unsigned char *out, int salt, int count) |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
550 { |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
551 unsigned int l_out, r_out, rawl, rawr; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
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|
552 unsigned int x[2]; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
553 int retval; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
554 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
555 if (!des_initialised) |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
556 des_init(); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
557 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
558 setup_salt(salt); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
559 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
560 memcpy(x, in, sizeof x); |
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edwarj4
parents:
diff
changeset
|
561 rawl = md_ntohl(x[0]); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
562 rawr = md_ntohl(x[1]); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
563 retval = do_des(rawl, rawr, &l_out, &r_out, count); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
564 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
565 x[0] = md_htonl(l_out); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
566 x[1] = md_htonl(r_out); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
567 memcpy(out, x, sizeof x); |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
568 return(retval); |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
569 } |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
570 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
571 char * |
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parents:
diff
changeset
|
572 xcrypt(const char *key, const char *setting) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
573 { |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
574 int i; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
575 unsigned int count, salt, l, r0, r1, keybuf[2]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
576 unsigned char *p, *q; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
577 static unsigned char output[21]; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
578 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
579 if (!des_initialised) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
580 des_init(); |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
581 |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
582 /* |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
583 * Copy the key, shifting each character up by one bit |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
584 * and padding with zeros. |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
585 */ |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
586 q = (unsigned char *) keybuf; |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
587 while ((q - (unsigned char *) keybuf) < sizeof(keybuf)) { |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
588 if ((*q++ = *key << 1)) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
changeset
|
589 key++; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
590 } |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
591 if (des_setkey((unsigned char *) keybuf)) |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
592 return(NULL); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
593 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
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|
594 if (*setting == _PASSWORD_EFMT1) { |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
595 /* |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
596 * "new"-style: |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
597 * setting - underscore, 4 bytes of count, 4 bytes of salt |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
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|
598 * key - unlimited characters |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
599 */ |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
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changeset
|
600 for (i = 1, count = 0; i < 5; i++) |
9535a08ddc39
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diff
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|
601 count |= ascii_to_bin(setting[i]) << (i - 1) * 6; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
changeset
|
602 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
603 for (i = 5, salt = 0; i < 9; i++) |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
604 salt |= ascii_to_bin(setting[i]) << (i - 5) * 6; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
605 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
606 while (*key) { |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
607 /* |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
608 * Encrypt the key with itself. |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
609 */ |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
610 if (des_cipher((unsigned char*)keybuf, (unsigned char*)keybuf, 0, 1)) |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
611 return(NULL); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
612 /* |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
613 * And XOR with the next 8 characters of the key. |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
614 */ |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
615 q = (unsigned char *) keybuf; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
616 while (((q - (unsigned char *) keybuf) < sizeof(keybuf)) && |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
changeset
|
617 *key) |
9535a08ddc39
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|
618 *q++ ^= *key++ << 1; |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
619 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
620 if (des_setkey((unsigned char *) keybuf)) |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
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diff
changeset
|
621 return(NULL); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
622 } |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
changeset
|
623 strncpy((char *)output, setting, 9); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
624 |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
625 /* |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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parents:
diff
changeset
|
626 * Double check that we weren't given a short setting. |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
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|
627 * If we were, the above code will probably have created |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
changeset
|
628 * wierd values for count and salt, but we don't really care. |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
changeset
|
629 * Just make sure the output string doesn't have an extra |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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|
630 * NUL in it. |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
edwarj4
parents:
diff
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631 */ |
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632 output[9] = '\0'; |
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633 p = output + strlen((const char *)output); |
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634 } else { |
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635 /* |
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636 * "old"-style: |
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637 * setting - 2 bytes of salt |
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638 * key - up to 8 characters |
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639 */ |
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640 count = 25; |
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641 |
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642 salt = (ascii_to_bin(setting[1]) << 6) |
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643 | ascii_to_bin(setting[0]); |
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644 |
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645 output[0] = setting[0]; |
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646 /* |
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647 * If the encrypted password that the salt was extracted from |
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648 * is only 1 character long, the salt will be corrupted. We |
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649 * need to ensure that the output string doesn't have an extra |
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650 * NUL in it! |
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651 */ |
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652 output[1] = setting[1] ? setting[1] : output[0]; |
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653 |
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654 p = output + 2; |
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655 } |
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656 setup_salt(salt); |
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657 /* |
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658 * Do it. |
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659 */ |
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660 if (do_des(0, 0, &r0, &r1, count)) |
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661 return(NULL); |
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662 /* |
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663 * Now encode the result... |
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664 */ |
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665 l = (r0 >> 8); |
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666 *p++ = ascii64[(l >> 18) & 0x3f]; |
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667 *p++ = ascii64[(l >> 12) & 0x3f]; |
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668 *p++ = ascii64[(l >> 6) & 0x3f]; |
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669 *p++ = ascii64[l & 0x3f]; |
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670 |
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671 l = (r0 << 16) | ((r1 >> 16) & 0xffff); |
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672 *p++ = ascii64[(l >> 18) & 0x3f]; |
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673 *p++ = ascii64[(l >> 12) & 0x3f]; |
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674 *p++ = ascii64[(l >> 6) & 0x3f]; |
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675 *p++ = ascii64[l & 0x3f]; |
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676 |
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677 l = r1 << 2; |
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678 *p++ = ascii64[(l >> 12) & 0x3f]; |
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679 *p++ = ascii64[(l >> 6) & 0x3f]; |
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680 *p++ = ascii64[l & 0x3f]; |
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681 *p = 0; |
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682 |
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683 return((char *)output); |
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684 } |