Mercurial > hg > early-roguelike
annotate rogue4/xcrypt.c @ 215:1b73a8641b37
rogue4: fix most GCC5 warnings.
Converting all function definitions to ANSI style accounts for most of
the change. This has exposed other problems, such as daemons not
actually being their stated type, that will require more careful
solutions.
author | John "Elwin" Edwards |
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date | Wed, 27 Jan 2016 19:41:05 -0500 |
parents | 9535a08ddc39 |
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rev | line source |
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12
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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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|
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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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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|
400 for (round = 0; round < 16; round++) { |
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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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|
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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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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|
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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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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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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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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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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|
457 } |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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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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diff
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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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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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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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diff
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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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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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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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diff
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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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diff
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|
487 /* |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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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:
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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)
edwarj4
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
changeset
|
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]] |
9535a08ddc39
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
changeset
|
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:
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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
changeset
|
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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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
changeset
|
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); |
9535a08ddc39
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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
changeset
|
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); |
9535a08ddc39
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 } |
9535a08ddc39
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
changeset
|
585 */ |
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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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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
changeset
|
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
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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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diff
changeset
|
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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|
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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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 /* |
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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)
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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)
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parents:
diff
changeset
|
621 return(NULL); |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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diff
changeset
|
622 } |
9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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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
changeset
|
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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Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
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683 return((char *)output); |
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684 } |