1 | /*
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2 | * This version has been further modified by Rich Felker, primary author
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3 | * and maintainer of musl libc, to remove table generation code and
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4 | * replaced all runtime-generated constant tables with static-initialized
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5 | * tables in the binary, in the interest of minimizing non-shareable
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6 | * memory usage and stack size requirements.
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7 | */
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8 | /*
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9 | * This version is derived from the original implementation of FreeSec
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10 | * (release 1.1) by David Burren. I've made it reentrant, reduced its memory
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11 | * usage from about 70 KB to about 7 KB (with only minimal performance impact
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12 | * and keeping code size about the same), made the handling of invalid salts
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13 | * mostly UFC-crypt compatible, added a quick runtime self-test (which also
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14 | * serves to zeroize the stack from sensitive data), and added optional tests.
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15 | * - Solar Designer <solar at openwall.com>
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16 | */
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17 |
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18 | /*
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19 | * FreeSec: libcrypt for NetBSD
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20 | *
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21 | * Copyright (c) 1994 David Burren
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22 | * Copyright (c) 2000,2002,2010,2012 Solar Designer
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23 | * All rights reserved.
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24 | *
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25 | * Redistribution and use in source and binary forms, with or without
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26 | * modification, are permitted provided that the following conditions
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27 | * are met:
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28 | * 1. Redistributions of source code must retain the above copyright
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29 | * notice, this list of conditions and the following disclaimer.
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30 | * 2. Redistributions in binary form must reproduce the above copyright
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31 | * notice, this list of conditions and the following disclaimer in the
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32 | * documentation and/or other materials provided with the distribution.
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33 | * 3. Neither the name of the author nor the names of other contributors
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34 | * may be used to endorse or promote products derived from this software
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35 | * without specific prior written permission.
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36 | *
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37 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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38 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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39 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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40 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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41 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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42 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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43 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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44 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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45 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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46 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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47 | * SUCH DAMAGE.
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48 | *
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49 | * $Owl: Owl/packages/glibc/crypt_freesec.c,v 1.6 2010/02/20 14:45:06 solar Exp $
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50 | * $Id$
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51 | *
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52 | * This is an original implementation of the DES and the crypt(3) interfaces
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53 | * by David Burren. It has been heavily re-worked by Solar Designer.
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54 | */
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55 |
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56 | #include <stdint.h>
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57 | #include <string.h>
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58 |
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59 | struct expanded_key {
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60 | uint32_t l[16], r[16];
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61 | };
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62 |
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63 | #define _PASSWORD_EFMT1 '_'
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64 |
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65 | static const unsigned char key_shifts[16] = {
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66 | 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
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67 | };
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68 |
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69 | static const uint32_t psbox[8][64] = {
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70 | {
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71 | 0x00808200,0x00000000,0x00008000,0x00808202,
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72 | 0x00808002,0x00008202,0x00000002,0x00008000,
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73 | 0x00000200,0x00808200,0x00808202,0x00000200,
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74 | 0x00800202,0x00808002,0x00800000,0x00000002,
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75 | 0x00000202,0x00800200,0x00800200,0x00008200,
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76 | 0x00008200,0x00808000,0x00808000,0x00800202,
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77 | 0x00008002,0x00800002,0x00800002,0x00008002,
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78 | 0x00000000,0x00000202,0x00008202,0x00800000,
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79 | 0x00008000,0x00808202,0x00000002,0x00808000,
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80 | 0x00808200,0x00800000,0x00800000,0x00000200,
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81 | 0x00808002,0x00008000,0x00008200,0x00800002,
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82 | 0x00000200,0x00000002,0x00800202,0x00008202,
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83 | 0x00808202,0x00008002,0x00808000,0x00800202,
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84 | 0x00800002,0x00000202,0x00008202,0x00808200,
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85 | 0x00000202,0x00800200,0x00800200,0x00000000,
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86 | 0x00008002,0x00008200,0x00000000,0x00808002,
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87 | },{
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88 | 0x40084010,0x40004000,0x00004000,0x00084010,
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89 | 0x00080000,0x00000010,0x40080010,0x40004010,
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90 | 0x40000010,0x40084010,0x40084000,0x40000000,
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91 | 0x40004000,0x00080000,0x00000010,0x40080010,
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92 | 0x00084000,0x00080010,0x40004010,0x00000000,
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93 | 0x40000000,0x00004000,0x00084010,0x40080000,
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94 | 0x00080010,0x40000010,0x00000000,0x00084000,
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95 | 0x00004010,0x40084000,0x40080000,0x00004010,
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96 | 0x00000000,0x00084010,0x40080010,0x00080000,
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97 | 0x40004010,0x40080000,0x40084000,0x00004000,
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98 | 0x40080000,0x40004000,0x00000010,0x40084010,
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99 | 0x00084010,0x00000010,0x00004000,0x40000000,
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100 | 0x00004010,0x40084000,0x00080000,0x40000010,
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101 | 0x00080010,0x40004010,0x40000010,0x00080010,
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102 | 0x00084000,0x00000000,0x40004000,0x00004010,
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103 | 0x40000000,0x40080010,0x40084010,0x00084000,
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104 | },{
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105 | 0x00000104,0x04010100,0x00000000,0x04010004,
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106 | 0x04000100,0x00000000,0x00010104,0x04000100,
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107 | 0x00010004,0x04000004,0x04000004,0x00010000,
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108 | 0x04010104,0x00010004,0x04010000,0x00000104,
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109 | 0x04000000,0x00000004,0x04010100,0x00000100,
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110 | 0x00010100,0x04010000,0x04010004,0x00010104,
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111 | 0x04000104,0x00010100,0x00010000,0x04000104,
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112 | 0x00000004,0x04010104,0x00000100,0x04000000,
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113 | 0x04010100,0x04000000,0x00010004,0x00000104,
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114 | 0x00010000,0x04010100,0x04000100,0x00000000,
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115 | 0x00000100,0x00010004,0x04010104,0x04000100,
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116 | 0x04000004,0x00000100,0x00000000,0x04010004,
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117 | 0x04000104,0x00010000,0x04000000,0x04010104,
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118 | 0x00000004,0x00010104,0x00010100,0x04000004,
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119 | 0x04010000,0x04000104,0x00000104,0x04010000,
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120 | 0x00010104,0x00000004,0x04010004,0x00010100,
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121 | },{
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122 | 0x80401000,0x80001040,0x80001040,0x00000040,
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123 | 0x00401040,0x80400040,0x80400000,0x80001000,
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124 | 0x00000000,0x00401000,0x00401000,0x80401040,
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125 | 0x80000040,0x00000000,0x00400040,0x80400000,
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126 | 0x80000000,0x00001000,0x00400000,0x80401000,
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127 | 0x00000040,0x00400000,0x80001000,0x00001040,
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128 | 0x80400040,0x80000000,0x00001040,0x00400040,
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129 | 0x00001000,0x00401040,0x80401040,0x80000040,
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130 | 0x00400040,0x80400000,0x00401000,0x80401040,
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131 | 0x80000040,0x00000000,0x00000000,0x00401000,
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132 | 0x00001040,0x00400040,0x80400040,0x80000000,
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133 | 0x80401000,0x80001040,0x80001040,0x00000040,
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134 | 0x80401040,0x80000040,0x80000000,0x00001000,
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135 | 0x80400000,0x80001000,0x00401040,0x80400040,
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136 | 0x80001000,0x00001040,0x00400000,0x80401000,
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137 | 0x00000040,0x00400000,0x00001000,0x00401040,
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138 | },{
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139 | 0x00000080,0x01040080,0x01040000,0x21000080,
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140 | 0x00040000,0x00000080,0x20000000,0x01040000,
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141 | 0x20040080,0x00040000,0x01000080,0x20040080,
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142 | 0x21000080,0x21040000,0x00040080,0x20000000,
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143 | 0x01000000,0x20040000,0x20040000,0x00000000,
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144 | 0x20000080,0x21040080,0x21040080,0x01000080,
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145 | 0x21040000,0x20000080,0x00000000,0x21000000,
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146 | 0x01040080,0x01000000,0x21000000,0x00040080,
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147 | 0x00040000,0x21000080,0x00000080,0x01000000,
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148 | 0x20000000,0x01040000,0x21000080,0x20040080,
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149 | 0x01000080,0x20000000,0x21040000,0x01040080,
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150 | 0x20040080,0x00000080,0x01000000,0x21040000,
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151 | 0x21040080,0x00040080,0x21000000,0x21040080,
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152 | 0x01040000,0x00000000,0x20040000,0x21000000,
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153 | 0x00040080,0x01000080,0x20000080,0x00040000,
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154 | 0x00000000,0x20040000,0x01040080,0x20000080,
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155 | },{
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156 | 0x10000008,0x10200000,0x00002000,0x10202008,
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157 | 0x10200000,0x00000008,0x10202008,0x00200000,
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158 | 0x10002000,0x00202008,0x00200000,0x10000008,
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159 | 0x00200008,0x10002000,0x10000000,0x00002008,
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160 | 0x00000000,0x00200008,0x10002008,0x00002000,
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161 | 0x00202000,0x10002008,0x00000008,0x10200008,
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162 | 0x10200008,0x00000000,0x00202008,0x10202000,
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163 | 0x00002008,0x00202000,0x10202000,0x10000000,
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164 | 0x10002000,0x00000008,0x10200008,0x00202000,
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165 | 0x10202008,0x00200000,0x00002008,0x10000008,
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166 | 0x00200000,0x10002000,0x10000000,0x00002008,
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167 | 0x10000008,0x10202008,0x00202000,0x10200000,
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168 | 0x00202008,0x10202000,0x00000000,0x10200008,
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169 | 0x00000008,0x00002000,0x10200000,0x00202008,
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170 | 0x00002000,0x00200008,0x10002008,0x00000000,
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171 | 0x10202000,0x10000000,0x00200008,0x10002008,
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172 | },{
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173 | 0x00100000,0x02100001,0x02000401,0x00000000,
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174 | 0x00000400,0x02000401,0x00100401,0x02100400,
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175 | 0x02100401,0x00100000,0x00000000,0x02000001,
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176 | 0x00000001,0x02000000,0x02100001,0x00000401,
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177 | 0x02000400,0x00100401,0x00100001,0x02000400,
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178 | 0x02000001,0x02100000,0x02100400,0x00100001,
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179 | 0x02100000,0x00000400,0x00000401,0x02100401,
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180 | 0x00100400,0x00000001,0x02000000,0x00100400,
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181 | 0x02000000,0x00100400,0x00100000,0x02000401,
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182 | 0x02000401,0x02100001,0x02100001,0x00000001,
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183 | 0x00100001,0x02000000,0x02000400,0x00100000,
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184 | 0x02100400,0x00000401,0x00100401,0x02100400,
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185 | 0x00000401,0x02000001,0x02100401,0x02100000,
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186 | 0x00100400,0x00000000,0x00000001,0x02100401,
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187 | 0x00000000,0x00100401,0x02100000,0x00000400,
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188 | 0x02000001,0x02000400,0x00000400,0x00100001,
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189 | },{
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190 | 0x08000820,0x00000800,0x00020000,0x08020820,
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191 | 0x08000000,0x08000820,0x00000020,0x08000000,
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192 | 0x00020020,0x08020000,0x08020820,0x00020800,
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193 | 0x08020800,0x00020820,0x00000800,0x00000020,
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194 | 0x08020000,0x08000020,0x08000800,0x00000820,
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195 | 0x00020800,0x00020020,0x08020020,0x08020800,
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196 | 0x00000820,0x00000000,0x00000000,0x08020020,
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197 | 0x08000020,0x08000800,0x00020820,0x00020000,
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198 | 0x00020820,0x00020000,0x08020800,0x00000800,
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199 | 0x00000020,0x08020020,0x00000800,0x00020820,
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200 | 0x08000800,0x00000020,0x08000020,0x08020000,
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201 | 0x08020020,0x08000000,0x00020000,0x08000820,
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202 | 0x00000000,0x08020820,0x00020020,0x08000020,
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203 | 0x08020000,0x08000800,0x08000820,0x00000000,
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204 | 0x08020820,0x00020800,0x00020800,0x00000820,
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205 | 0x00000820,0x00020020,0x08000000,0x08020800,
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206 | },
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207 | };
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208 | static const uint32_t ip_maskl[16][16] = {
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209 | {
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210 | 0x00000000,0x00010000,0x00000000,0x00010000,
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211 | 0x01000000,0x01010000,0x01000000,0x01010000,
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212 | 0x00000000,0x00010000,0x00000000,0x00010000,
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213 | 0x01000000,0x01010000,0x01000000,0x01010000,
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214 | },{
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215 | 0x00000000,0x00000001,0x00000000,0x00000001,
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216 | 0x00000100,0x00000101,0x00000100,0x00000101,
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217 | 0x00000000,0x00000001,0x00000000,0x00000001,
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218 | 0x00000100,0x00000101,0x00000100,0x00000101,
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219 | },{
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220 | 0x00000000,0x00020000,0x00000000,0x00020000,
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221 | 0x02000000,0x02020000,0x02000000,0x02020000,
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222 | 0x00000000,0x00020000,0x00000000,0x00020000,
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223 | 0x02000000,0x02020000,0x02000000,0x02020000,
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224 | },{
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225 | 0x00000000,0x00000002,0x00000000,0x00000002,
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226 | 0x00000200,0x00000202,0x00000200,0x00000202,
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227 | 0x00000000,0x00000002,0x00000000,0x00000002,
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228 | 0x00000200,0x00000202,0x00000200,0x00000202,
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229 | },{
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230 | 0x00000000,0x00040000,0x00000000,0x00040000,
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231 | 0x04000000,0x04040000,0x04000000,0x04040000,
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232 | 0x00000000,0x00040000,0x00000000,0x00040000,
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233 | 0x04000000,0x04040000,0x04000000,0x04040000,
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234 | },{
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235 | 0x00000000,0x00000004,0x00000000,0x00000004,
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236 | 0x00000400,0x00000404,0x00000400,0x00000404,
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237 | 0x00000000,0x00000004,0x00000000,0x00000004,
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238 | 0x00000400,0x00000404,0x00000400,0x00000404,
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239 | },{
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240 | 0x00000000,0x00080000,0x00000000,0x00080000,
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241 | 0x08000000,0x08080000,0x08000000,0x08080000,
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242 | 0x00000000,0x00080000,0x00000000,0x00080000,
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243 | 0x08000000,0x08080000,0x08000000,0x08080000,
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244 | },{
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245 | 0x00000000,0x00000008,0x00000000,0x00000008,
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246 | 0x00000800,0x00000808,0x00000800,0x00000808,
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247 | 0x00000000,0x00000008,0x00000000,0x00000008,
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248 | 0x00000800,0x00000808,0x00000800,0x00000808,
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249 | },{
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250 | 0x00000000,0x00100000,0x00000000,0x00100000,
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251 | 0x10000000,0x10100000,0x10000000,0x10100000,
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252 | 0x00000000,0x00100000,0x00000000,0x00100000,
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253 | 0x10000000,0x10100000,0x10000000,0x10100000,
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254 | },{
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255 | 0x00000000,0x00000010,0x00000000,0x00000010,
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256 | 0x00001000,0x00001010,0x00001000,0x00001010,
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257 | 0x00000000,0x00000010,0x00000000,0x00000010,
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258 | 0x00001000,0x00001010,0x00001000,0x00001010,
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259 | },{
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260 | 0x00000000,0x00200000,0x00000000,0x00200000,
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261 | 0x20000000,0x20200000,0x20000000,0x20200000,
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262 | 0x00000000,0x00200000,0x00000000,0x00200000,
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263 | 0x20000000,0x20200000,0x20000000,0x20200000,
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264 | },{
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265 | 0x00000000,0x00000020,0x00000000,0x00000020,
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266 | 0x00002000,0x00002020,0x00002000,0x00002020,
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267 | 0x00000000,0x00000020,0x00000000,0x00000020,
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268 | 0x00002000,0x00002020,0x00002000,0x00002020,
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269 | },{
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270 | 0x00000000,0x00400000,0x00000000,0x00400000,
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271 | 0x40000000,0x40400000,0x40000000,0x40400000,
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272 | 0x00000000,0x00400000,0x00000000,0x00400000,
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273 | 0x40000000,0x40400000,0x40000000,0x40400000,
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274 | },{
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275 | 0x00000000,0x00000040,0x00000000,0x00000040,
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276 | 0x00004000,0x00004040,0x00004000,0x00004040,
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277 | 0x00000000,0x00000040,0x00000000,0x00000040,
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278 | 0x00004000,0x00004040,0x00004000,0x00004040,
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279 | },{
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280 | 0x00000000,0x00800000,0x00000000,0x00800000,
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281 | 0x80000000,0x80800000,0x80000000,0x80800000,
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282 | 0x00000000,0x00800000,0x00000000,0x00800000,
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283 | 0x80000000,0x80800000,0x80000000,0x80800000,
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284 | },{
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285 | 0x00000000,0x00000080,0x00000000,0x00000080,
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286 | 0x00008000,0x00008080,0x00008000,0x00008080,
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287 | 0x00000000,0x00000080,0x00000000,0x00000080,
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288 | 0x00008000,0x00008080,0x00008000,0x00008080,
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289 | },
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290 | };
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291 | static const uint32_t ip_maskr[16][16] = {
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292 | {
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293 | 0x00000000,0x00000000,0x00010000,0x00010000,
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294 | 0x00000000,0x00000000,0x00010000,0x00010000,
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295 | 0x01000000,0x01000000,0x01010000,0x01010000,
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296 | 0x01000000,0x01000000,0x01010000,0x01010000,
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297 | },{
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298 | 0x00000000,0x00000000,0x00000001,0x00000001,
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299 | 0x00000000,0x00000000,0x00000001,0x00000001,
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300 | 0x00000100,0x00000100,0x00000101,0x00000101,
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301 | 0x00000100,0x00000100,0x00000101,0x00000101,
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302 | },{
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303 | 0x00000000,0x00000000,0x00020000,0x00020000,
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304 | 0x00000000,0x00000000,0x00020000,0x00020000,
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305 | 0x02000000,0x02000000,0x02020000,0x02020000,
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306 | 0x02000000,0x02000000,0x02020000,0x02020000,
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307 | },{
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308 | 0x00000000,0x00000000,0x00000002,0x00000002,
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---|
309 | 0x00000000,0x00000000,0x00000002,0x00000002,
|
---|
310 | 0x00000200,0x00000200,0x00000202,0x00000202,
|
---|
311 | 0x00000200,0x00000200,0x00000202,0x00000202,
|
---|
312 | },{
|
---|
313 | 0x00000000,0x00000000,0x00040000,0x00040000,
|
---|
314 | 0x00000000,0x00000000,0x00040000,0x00040000,
|
---|
315 | 0x04000000,0x04000000,0x04040000,0x04040000,
|
---|
316 | 0x04000000,0x04000000,0x04040000,0x04040000,
|
---|
317 | },{
|
---|
318 | 0x00000000,0x00000000,0x00000004,0x00000004,
|
---|
319 | 0x00000000,0x00000000,0x00000004,0x00000004,
|
---|
320 | 0x00000400,0x00000400,0x00000404,0x00000404,
|
---|
321 | 0x00000400,0x00000400,0x00000404,0x00000404,
|
---|
322 | },{
|
---|
323 | 0x00000000,0x00000000,0x00080000,0x00080000,
|
---|
324 | 0x00000000,0x00000000,0x00080000,0x00080000,
|
---|
325 | 0x08000000,0x08000000,0x08080000,0x08080000,
|
---|
326 | 0x08000000,0x08000000,0x08080000,0x08080000,
|
---|
327 | },{
|
---|
328 | 0x00000000,0x00000000,0x00000008,0x00000008,
|
---|
329 | 0x00000000,0x00000000,0x00000008,0x00000008,
|
---|
330 | 0x00000800,0x00000800,0x00000808,0x00000808,
|
---|
331 | 0x00000800,0x00000800,0x00000808,0x00000808,
|
---|
332 | },{
|
---|
333 | 0x00000000,0x00000000,0x00100000,0x00100000,
|
---|
334 | 0x00000000,0x00000000,0x00100000,0x00100000,
|
---|
335 | 0x10000000,0x10000000,0x10100000,0x10100000,
|
---|
336 | 0x10000000,0x10000000,0x10100000,0x10100000,
|
---|
337 | },{
|
---|
338 | 0x00000000,0x00000000,0x00000010,0x00000010,
|
---|
339 | 0x00000000,0x00000000,0x00000010,0x00000010,
|
---|
340 | 0x00001000,0x00001000,0x00001010,0x00001010,
|
---|
341 | 0x00001000,0x00001000,0x00001010,0x00001010,
|
---|
342 | },{
|
---|
343 | 0x00000000,0x00000000,0x00200000,0x00200000,
|
---|
344 | 0x00000000,0x00000000,0x00200000,0x00200000,
|
---|
345 | 0x20000000,0x20000000,0x20200000,0x20200000,
|
---|
346 | 0x20000000,0x20000000,0x20200000,0x20200000,
|
---|
347 | },{
|
---|
348 | 0x00000000,0x00000000,0x00000020,0x00000020,
|
---|
349 | 0x00000000,0x00000000,0x00000020,0x00000020,
|
---|
350 | 0x00002000,0x00002000,0x00002020,0x00002020,
|
---|
351 | 0x00002000,0x00002000,0x00002020,0x00002020,
|
---|
352 | },{
|
---|
353 | 0x00000000,0x00000000,0x00400000,0x00400000,
|
---|
354 | 0x00000000,0x00000000,0x00400000,0x00400000,
|
---|
355 | 0x40000000,0x40000000,0x40400000,0x40400000,
|
---|
356 | 0x40000000,0x40000000,0x40400000,0x40400000,
|
---|
357 | },{
|
---|
358 | 0x00000000,0x00000000,0x00000040,0x00000040,
|
---|
359 | 0x00000000,0x00000000,0x00000040,0x00000040,
|
---|
360 | 0x00004000,0x00004000,0x00004040,0x00004040,
|
---|
361 | 0x00004000,0x00004000,0x00004040,0x00004040,
|
---|
362 | },{
|
---|
363 | 0x00000000,0x00000000,0x00800000,0x00800000,
|
---|
364 | 0x00000000,0x00000000,0x00800000,0x00800000,
|
---|
365 | 0x80000000,0x80000000,0x80800000,0x80800000,
|
---|
366 | 0x80000000,0x80000000,0x80800000,0x80800000,
|
---|
367 | },{
|
---|
368 | 0x00000000,0x00000000,0x00000080,0x00000080,
|
---|
369 | 0x00000000,0x00000000,0x00000080,0x00000080,
|
---|
370 | 0x00008000,0x00008000,0x00008080,0x00008080,
|
---|
371 | 0x00008000,0x00008000,0x00008080,0x00008080,
|
---|
372 | },
|
---|
373 | };
|
---|
374 | static const uint32_t fp_maskl[8][16] = {
|
---|
375 | {
|
---|
376 | 0x00000000,0x40000000,0x00400000,0x40400000,
|
---|
377 | 0x00004000,0x40004000,0x00404000,0x40404000,
|
---|
378 | 0x00000040,0x40000040,0x00400040,0x40400040,
|
---|
379 | 0x00004040,0x40004040,0x00404040,0x40404040,
|
---|
380 | },{
|
---|
381 | 0x00000000,0x10000000,0x00100000,0x10100000,
|
---|
382 | 0x00001000,0x10001000,0x00101000,0x10101000,
|
---|
383 | 0x00000010,0x10000010,0x00100010,0x10100010,
|
---|
384 | 0x00001010,0x10001010,0x00101010,0x10101010,
|
---|
385 | },{
|
---|
386 | 0x00000000,0x04000000,0x00040000,0x04040000,
|
---|
387 | 0x00000400,0x04000400,0x00040400,0x04040400,
|
---|
388 | 0x00000004,0x04000004,0x00040004,0x04040004,
|
---|
389 | 0x00000404,0x04000404,0x00040404,0x04040404,
|
---|
390 | },{
|
---|
391 | 0x00000000,0x01000000,0x00010000,0x01010000,
|
---|
392 | 0x00000100,0x01000100,0x00010100,0x01010100,
|
---|
393 | 0x00000001,0x01000001,0x00010001,0x01010001,
|
---|
394 | 0x00000101,0x01000101,0x00010101,0x01010101,
|
---|
395 | },{
|
---|
396 | 0x00000000,0x80000000,0x00800000,0x80800000,
|
---|
397 | 0x00008000,0x80008000,0x00808000,0x80808000,
|
---|
398 | 0x00000080,0x80000080,0x00800080,0x80800080,
|
---|
399 | 0x00008080,0x80008080,0x00808080,0x80808080,
|
---|
400 | },{
|
---|
401 | 0x00000000,0x20000000,0x00200000,0x20200000,
|
---|
402 | 0x00002000,0x20002000,0x00202000,0x20202000,
|
---|
403 | 0x00000020,0x20000020,0x00200020,0x20200020,
|
---|
404 | 0x00002020,0x20002020,0x00202020,0x20202020,
|
---|
405 | },{
|
---|
406 | 0x00000000,0x08000000,0x00080000,0x08080000,
|
---|
407 | 0x00000800,0x08000800,0x00080800,0x08080800,
|
---|
408 | 0x00000008,0x08000008,0x00080008,0x08080008,
|
---|
409 | 0x00000808,0x08000808,0x00080808,0x08080808,
|
---|
410 | },{
|
---|
411 | 0x00000000,0x02000000,0x00020000,0x02020000,
|
---|
412 | 0x00000200,0x02000200,0x00020200,0x02020200,
|
---|
413 | 0x00000002,0x02000002,0x00020002,0x02020002,
|
---|
414 | 0x00000202,0x02000202,0x00020202,0x02020202,
|
---|
415 | },
|
---|
416 | };
|
---|
417 | static const uint32_t fp_maskr[8][16] = {
|
---|
418 | {
|
---|
419 | 0x00000000,0x40000000,0x00400000,0x40400000,
|
---|
420 | 0x00004000,0x40004000,0x00404000,0x40404000,
|
---|
421 | 0x00000040,0x40000040,0x00400040,0x40400040,
|
---|
422 | 0x00004040,0x40004040,0x00404040,0x40404040,
|
---|
423 | },{
|
---|
424 | 0x00000000,0x10000000,0x00100000,0x10100000,
|
---|
425 | 0x00001000,0x10001000,0x00101000,0x10101000,
|
---|
426 | 0x00000010,0x10000010,0x00100010,0x10100010,
|
---|
427 | 0x00001010,0x10001010,0x00101010,0x10101010,
|
---|
428 | },{
|
---|
429 | 0x00000000,0x04000000,0x00040000,0x04040000,
|
---|
430 | 0x00000400,0x04000400,0x00040400,0x04040400,
|
---|
431 | 0x00000004,0x04000004,0x00040004,0x04040004,
|
---|
432 | 0x00000404,0x04000404,0x00040404,0x04040404,
|
---|
433 | },{
|
---|
434 | 0x00000000,0x01000000,0x00010000,0x01010000,
|
---|
435 | 0x00000100,0x01000100,0x00010100,0x01010100,
|
---|
436 | 0x00000001,0x01000001,0x00010001,0x01010001,
|
---|
437 | 0x00000101,0x01000101,0x00010101,0x01010101,
|
---|
438 | },{
|
---|
439 | 0x00000000,0x80000000,0x00800000,0x80800000,
|
---|
440 | 0x00008000,0x80008000,0x00808000,0x80808000,
|
---|
441 | 0x00000080,0x80000080,0x00800080,0x80800080,
|
---|
442 | 0x00008080,0x80008080,0x00808080,0x80808080,
|
---|
443 | },{
|
---|
444 | 0x00000000,0x20000000,0x00200000,0x20200000,
|
---|
445 | 0x00002000,0x20002000,0x00202000,0x20202000,
|
---|
446 | 0x00000020,0x20000020,0x00200020,0x20200020,
|
---|
447 | 0x00002020,0x20002020,0x00202020,0x20202020,
|
---|
448 | },{
|
---|
449 | 0x00000000,0x08000000,0x00080000,0x08080000,
|
---|
450 | 0x00000800,0x08000800,0x00080800,0x08080800,
|
---|
451 | 0x00000008,0x08000008,0x00080008,0x08080008,
|
---|
452 | 0x00000808,0x08000808,0x00080808,0x08080808,
|
---|
453 | },{
|
---|
454 | 0x00000000,0x02000000,0x00020000,0x02020000,
|
---|
455 | 0x00000200,0x02000200,0x00020200,0x02020200,
|
---|
456 | 0x00000002,0x02000002,0x00020002,0x02020002,
|
---|
457 | 0x00000202,0x02000202,0x00020202,0x02020202,
|
---|
458 | },
|
---|
459 | };
|
---|
460 | static const uint32_t key_perm_maskl[8][16] = {
|
---|
461 | {
|
---|
462 | 0x00000000,0x00000000,0x00000010,0x00000010,
|
---|
463 | 0x00001000,0x00001000,0x00001010,0x00001010,
|
---|
464 | 0x00100000,0x00100000,0x00100010,0x00100010,
|
---|
465 | 0x00101000,0x00101000,0x00101010,0x00101010,
|
---|
466 | },{
|
---|
467 | 0x00000000,0x00000000,0x00000020,0x00000020,
|
---|
468 | 0x00002000,0x00002000,0x00002020,0x00002020,
|
---|
469 | 0x00200000,0x00200000,0x00200020,0x00200020,
|
---|
470 | 0x00202000,0x00202000,0x00202020,0x00202020,
|
---|
471 | },{
|
---|
472 | 0x00000000,0x00000000,0x00000040,0x00000040,
|
---|
473 | 0x00004000,0x00004000,0x00004040,0x00004040,
|
---|
474 | 0x00400000,0x00400000,0x00400040,0x00400040,
|
---|
475 | 0x00404000,0x00404000,0x00404040,0x00404040,
|
---|
476 | },{
|
---|
477 | 0x00000000,0x00000000,0x00000080,0x00000080,
|
---|
478 | 0x00008000,0x00008000,0x00008080,0x00008080,
|
---|
479 | 0x00800000,0x00800000,0x00800080,0x00800080,
|
---|
480 | 0x00808000,0x00808000,0x00808080,0x00808080,
|
---|
481 | },{
|
---|
482 | 0x00000000,0x00000001,0x00000100,0x00000101,
|
---|
483 | 0x00010000,0x00010001,0x00010100,0x00010101,
|
---|
484 | 0x01000000,0x01000001,0x01000100,0x01000101,
|
---|
485 | 0x01010000,0x01010001,0x01010100,0x01010101,
|
---|
486 | },{
|
---|
487 | 0x00000000,0x00000002,0x00000200,0x00000202,
|
---|
488 | 0x00020000,0x00020002,0x00020200,0x00020202,
|
---|
489 | 0x02000000,0x02000002,0x02000200,0x02000202,
|
---|
490 | 0x02020000,0x02020002,0x02020200,0x02020202,
|
---|
491 | },{
|
---|
492 | 0x00000000,0x00000004,0x00000400,0x00000404,
|
---|
493 | 0x00040000,0x00040004,0x00040400,0x00040404,
|
---|
494 | 0x04000000,0x04000004,0x04000400,0x04000404,
|
---|
495 | 0x04040000,0x04040004,0x04040400,0x04040404,
|
---|
496 | },{
|
---|
497 | 0x00000000,0x00000008,0x00000800,0x00000808,
|
---|
498 | 0x00080000,0x00080008,0x00080800,0x00080808,
|
---|
499 | 0x08000000,0x08000008,0x08000800,0x08000808,
|
---|
500 | 0x08080000,0x08080008,0x08080800,0x08080808,
|
---|
501 | },
|
---|
502 | };
|
---|
503 | static const uint32_t key_perm_maskr[12][16] = {
|
---|
504 | {
|
---|
505 | 0x00000000,0x00000001,0x00000000,0x00000001,
|
---|
506 | 0x00000000,0x00000001,0x00000000,0x00000001,
|
---|
507 | 0x00000000,0x00000001,0x00000000,0x00000001,
|
---|
508 | 0x00000000,0x00000001,0x00000000,0x00000001,
|
---|
509 | },{
|
---|
510 | 0x00000000,0x00000000,0x00100000,0x00100000,
|
---|
511 | 0x00001000,0x00001000,0x00101000,0x00101000,
|
---|
512 | 0x00000010,0x00000010,0x00100010,0x00100010,
|
---|
513 | 0x00001010,0x00001010,0x00101010,0x00101010,
|
---|
514 | },{
|
---|
515 | 0x00000000,0x00000002,0x00000000,0x00000002,
|
---|
516 | 0x00000000,0x00000002,0x00000000,0x00000002,
|
---|
517 | 0x00000000,0x00000002,0x00000000,0x00000002,
|
---|
518 | 0x00000000,0x00000002,0x00000000,0x00000002,
|
---|
519 | },{
|
---|
520 | 0x00000000,0x00000000,0x00200000,0x00200000,
|
---|
521 | 0x00002000,0x00002000,0x00202000,0x00202000,
|
---|
522 | 0x00000020,0x00000020,0x00200020,0x00200020,
|
---|
523 | 0x00002020,0x00002020,0x00202020,0x00202020,
|
---|
524 | },{
|
---|
525 | 0x00000000,0x00000004,0x00000000,0x00000004,
|
---|
526 | 0x00000000,0x00000004,0x00000000,0x00000004,
|
---|
527 | 0x00000000,0x00000004,0x00000000,0x00000004,
|
---|
528 | 0x00000000,0x00000004,0x00000000,0x00000004,
|
---|
529 | },{
|
---|
530 | 0x00000000,0x00000000,0x00400000,0x00400000,
|
---|
531 | 0x00004000,0x00004000,0x00404000,0x00404000,
|
---|
532 | 0x00000040,0x00000040,0x00400040,0x00400040,
|
---|
533 | 0x00004040,0x00004040,0x00404040,0x00404040,
|
---|
534 | },{
|
---|
535 | 0x00000000,0x00000008,0x00000000,0x00000008,
|
---|
536 | 0x00000000,0x00000008,0x00000000,0x00000008,
|
---|
537 | 0x00000000,0x00000008,0x00000000,0x00000008,
|
---|
538 | 0x00000000,0x00000008,0x00000000,0x00000008,
|
---|
539 | },{
|
---|
540 | 0x00000000,0x00000000,0x00800000,0x00800000,
|
---|
541 | 0x00008000,0x00008000,0x00808000,0x00808000,
|
---|
542 | 0x00000080,0x00000080,0x00800080,0x00800080,
|
---|
543 | 0x00008080,0x00008080,0x00808080,0x00808080,
|
---|
544 | },{
|
---|
545 | 0x00000000,0x00000000,0x01000000,0x01000000,
|
---|
546 | 0x00010000,0x00010000,0x01010000,0x01010000,
|
---|
547 | 0x00000100,0x00000100,0x01000100,0x01000100,
|
---|
548 | 0x00010100,0x00010100,0x01010100,0x01010100,
|
---|
549 | },{
|
---|
550 | 0x00000000,0x00000000,0x02000000,0x02000000,
|
---|
551 | 0x00020000,0x00020000,0x02020000,0x02020000,
|
---|
552 | 0x00000200,0x00000200,0x02000200,0x02000200,
|
---|
553 | 0x00020200,0x00020200,0x02020200,0x02020200,
|
---|
554 | },{
|
---|
555 | 0x00000000,0x00000000,0x04000000,0x04000000,
|
---|
556 | 0x00040000,0x00040000,0x04040000,0x04040000,
|
---|
557 | 0x00000400,0x00000400,0x04000400,0x04000400,
|
---|
558 | 0x00040400,0x00040400,0x04040400,0x04040400,
|
---|
559 | },{
|
---|
560 | 0x00000000,0x00000000,0x08000000,0x08000000,
|
---|
561 | 0x00080000,0x00080000,0x08080000,0x08080000,
|
---|
562 | 0x00000800,0x00000800,0x08000800,0x08000800,
|
---|
563 | 0x00080800,0x00080800,0x08080800,0x08080800,
|
---|
564 | },
|
---|
565 | };
|
---|
566 | static const uint32_t comp_maskl0[4][8] = {
|
---|
567 | {
|
---|
568 | 0x00000000,0x00020000,0x00000001,0x00020001,
|
---|
569 | 0x00080000,0x000a0000,0x00080001,0x000a0001,
|
---|
570 | },{
|
---|
571 | 0x00000000,0x00001000,0x00000000,0x00001000,
|
---|
572 | 0x00000040,0x00001040,0x00000040,0x00001040,
|
---|
573 | },{
|
---|
574 | 0x00000000,0x00400000,0x00000020,0x00400020,
|
---|
575 | 0x00008000,0x00408000,0x00008020,0x00408020,
|
---|
576 | },{
|
---|
577 | 0x00000000,0x00100000,0x00000800,0x00100800,
|
---|
578 | 0x00000000,0x00100000,0x00000800,0x00100800,
|
---|
579 | },
|
---|
580 | };
|
---|
581 | static const uint32_t comp_maskr0[4][8] = {
|
---|
582 | {
|
---|
583 | 0x00000000,0x00200000,0x00020000,0x00220000,
|
---|
584 | 0x00000002,0x00200002,0x00020002,0x00220002,
|
---|
585 | },{
|
---|
586 | 0x00000000,0x00000000,0x00100000,0x00100000,
|
---|
587 | 0x00000004,0x00000004,0x00100004,0x00100004,
|
---|
588 | },{
|
---|
589 | 0x00000000,0x00004000,0x00000800,0x00004800,
|
---|
590 | 0x00000000,0x00004000,0x00000800,0x00004800,
|
---|
591 | },{
|
---|
592 | 0x00000000,0x00400000,0x00008000,0x00408000,
|
---|
593 | 0x00000008,0x00400008,0x00008008,0x00408008,
|
---|
594 | },
|
---|
595 | };
|
---|
596 | static const uint32_t comp_maskl1[4][16] = {
|
---|
597 | {
|
---|
598 | 0x00000000,0x00000010,0x00004000,0x00004010,
|
---|
599 | 0x00040000,0x00040010,0x00044000,0x00044010,
|
---|
600 | 0x00000100,0x00000110,0x00004100,0x00004110,
|
---|
601 | 0x00040100,0x00040110,0x00044100,0x00044110,
|
---|
602 | },{
|
---|
603 | 0x00000000,0x00800000,0x00000002,0x00800002,
|
---|
604 | 0x00000200,0x00800200,0x00000202,0x00800202,
|
---|
605 | 0x00200000,0x00a00000,0x00200002,0x00a00002,
|
---|
606 | 0x00200200,0x00a00200,0x00200202,0x00a00202,
|
---|
607 | },{
|
---|
608 | 0x00000000,0x00002000,0x00000004,0x00002004,
|
---|
609 | 0x00000400,0x00002400,0x00000404,0x00002404,
|
---|
610 | 0x00000000,0x00002000,0x00000004,0x00002004,
|
---|
611 | 0x00000400,0x00002400,0x00000404,0x00002404,
|
---|
612 | },{
|
---|
613 | 0x00000000,0x00010000,0x00000008,0x00010008,
|
---|
614 | 0x00000080,0x00010080,0x00000088,0x00010088,
|
---|
615 | 0x00000000,0x00010000,0x00000008,0x00010008,
|
---|
616 | 0x00000080,0x00010080,0x00000088,0x00010088,
|
---|
617 | },
|
---|
618 | };
|
---|
619 | static const uint32_t comp_maskr1[4][16] = {
|
---|
620 | {
|
---|
621 | 0x00000000,0x00000000,0x00000080,0x00000080,
|
---|
622 | 0x00002000,0x00002000,0x00002080,0x00002080,
|
---|
623 | 0x00000001,0x00000001,0x00000081,0x00000081,
|
---|
624 | 0x00002001,0x00002001,0x00002081,0x00002081,
|
---|
625 | },{
|
---|
626 | 0x00000000,0x00000010,0x00800000,0x00800010,
|
---|
627 | 0x00010000,0x00010010,0x00810000,0x00810010,
|
---|
628 | 0x00000200,0x00000210,0x00800200,0x00800210,
|
---|
629 | 0x00010200,0x00010210,0x00810200,0x00810210,
|
---|
630 | },{
|
---|
631 | 0x00000000,0x00000400,0x00001000,0x00001400,
|
---|
632 | 0x00080000,0x00080400,0x00081000,0x00081400,
|
---|
633 | 0x00000020,0x00000420,0x00001020,0x00001420,
|
---|
634 | 0x00080020,0x00080420,0x00081020,0x00081420,
|
---|
635 | },{
|
---|
636 | 0x00000000,0x00000100,0x00040000,0x00040100,
|
---|
637 | 0x00000000,0x00000100,0x00040000,0x00040100,
|
---|
638 | 0x00000040,0x00000140,0x00040040,0x00040140,
|
---|
639 | 0x00000040,0x00000140,0x00040040,0x00040140,
|
---|
640 | },
|
---|
641 | };
|
---|
642 |
|
---|
643 | static const unsigned char ascii64[] =
|
---|
644 | "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
|
---|
645 | /* 0000000000111111111122222222223333333333444444444455555555556666 */
|
---|
646 | /* 0123456789012345678901234567890123456789012345678901234567890123 */
|
---|
647 |
|
---|
648 | /*
|
---|
649 | * We match the behavior of UFC-crypt on systems where "char" is signed by
|
---|
650 | * default (the majority), regardless of char's signedness on our system.
|
---|
651 | */
|
---|
652 | static uint32_t ascii_to_bin(int ch)
|
---|
653 | {
|
---|
654 | int sch = (ch < 0x80) ? ch : -(0x100 - ch);
|
---|
655 | int retval;
|
---|
656 |
|
---|
657 | retval = sch - '.';
|
---|
658 | if (sch >= 'A') {
|
---|
659 | retval = sch - ('A' - 12);
|
---|
660 | if (sch >= 'a')
|
---|
661 | retval = sch - ('a' - 38);
|
---|
662 | }
|
---|
663 | retval &= 0x3f;
|
---|
664 |
|
---|
665 | return retval;
|
---|
666 | }
|
---|
667 |
|
---|
668 | /*
|
---|
669 | * When we choose to "support" invalid salts, nevertheless disallow those
|
---|
670 | * containing characters that would violate the passwd file format.
|
---|
671 | */
|
---|
672 | static inline int ascii_is_unsafe(unsigned char ch)
|
---|
673 | {
|
---|
674 | return !ch || ch == '\n' || ch == ':';
|
---|
675 | }
|
---|
676 |
|
---|
677 | static uint32_t setup_salt(uint32_t salt)
|
---|
678 | {
|
---|
679 | uint32_t obit, saltbit, saltbits;
|
---|
680 | unsigned int i;
|
---|
681 |
|
---|
682 | saltbits = 0;
|
---|
683 | saltbit = 1;
|
---|
684 | obit = 0x800000;
|
---|
685 | for (i = 0; i < 24; i++) {
|
---|
686 | if (salt & saltbit)
|
---|
687 | saltbits |= obit;
|
---|
688 | saltbit <<= 1;
|
---|
689 | obit >>= 1;
|
---|
690 | }
|
---|
691 |
|
---|
692 | return saltbits;
|
---|
693 | }
|
---|
694 |
|
---|
695 | void __des_setkey(const unsigned char *key, struct expanded_key *ekey)
|
---|
696 | {
|
---|
697 | uint32_t k0, k1, rawkey0, rawkey1;
|
---|
698 | unsigned int shifts, round, i, ibit;
|
---|
699 |
|
---|
700 | rawkey0 =
|
---|
701 | (uint32_t)key[3] |
|
---|
702 | ((uint32_t)key[2] << 8) |
|
---|
703 | ((uint32_t)key[1] << 16) |
|
---|
704 | ((uint32_t)key[0] << 24);
|
---|
705 | rawkey1 =
|
---|
706 | (uint32_t)key[7] |
|
---|
707 | ((uint32_t)key[6] << 8) |
|
---|
708 | ((uint32_t)key[5] << 16) |
|
---|
709 | ((uint32_t)key[4] << 24);
|
---|
710 |
|
---|
711 | /*
|
---|
712 | * Do key permutation and split into two 28-bit subkeys.
|
---|
713 | */
|
---|
714 | k0 = k1 = 0;
|
---|
715 | for (i = 0, ibit = 28; i < 4; i++, ibit -= 4) {
|
---|
716 | unsigned int j = i << 1;
|
---|
717 | k0 |= key_perm_maskl[i][(rawkey0 >> ibit) & 0xf] |
|
---|
718 | key_perm_maskl[i + 4][(rawkey1 >> ibit) & 0xf];
|
---|
719 | k1 |= key_perm_maskr[j][(rawkey0 >> ibit) & 0xf];
|
---|
720 | ibit -= 4;
|
---|
721 | k1 |= key_perm_maskr[j + 1][(rawkey0 >> ibit) & 0xf] |
|
---|
722 | key_perm_maskr[i + 8][(rawkey1 >> ibit) & 0xf];
|
---|
723 | }
|
---|
724 |
|
---|
725 | /*
|
---|
726 | * Rotate subkeys and do compression permutation.
|
---|
727 | */
|
---|
728 | shifts = 0;
|
---|
729 | for (round = 0; round < 16; round++) {
|
---|
730 | uint32_t t0, t1;
|
---|
731 | uint32_t kl, kr;
|
---|
732 |
|
---|
733 | shifts += key_shifts[round];
|
---|
734 |
|
---|
735 | t0 = (k0 << shifts) | (k0 >> (28 - shifts));
|
---|
736 | t1 = (k1 << shifts) | (k1 >> (28 - shifts));
|
---|
737 |
|
---|
738 | kl = kr = 0;
|
---|
739 | ibit = 25;
|
---|
740 | for (i = 0; i < 4; i++) {
|
---|
741 | kl |= comp_maskl0[i][(t0 >> ibit) & 7];
|
---|
742 | kr |= comp_maskr0[i][(t1 >> ibit) & 7];
|
---|
743 | ibit -= 4;
|
---|
744 | kl |= comp_maskl1[i][(t0 >> ibit) & 0xf];
|
---|
745 | kr |= comp_maskr1[i][(t1 >> ibit) & 0xf];
|
---|
746 | ibit -= 3;
|
---|
747 | }
|
---|
748 | ekey->l[round] = kl;
|
---|
749 | ekey->r[round] = kr;
|
---|
750 | }
|
---|
751 | }
|
---|
752 |
|
---|
753 | /*
|
---|
754 | * l_in, r_in, l_out, and r_out are in pseudo-"big-endian" format.
|
---|
755 | */
|
---|
756 | void __do_des(uint32_t l_in, uint32_t r_in,
|
---|
757 | uint32_t *l_out, uint32_t *r_out,
|
---|
758 | uint32_t count, uint32_t saltbits, const struct expanded_key *ekey)
|
---|
759 | {
|
---|
760 | uint32_t l, r;
|
---|
761 |
|
---|
762 | /*
|
---|
763 | * Do initial permutation (IP).
|
---|
764 | */
|
---|
765 | l = r = 0;
|
---|
766 | if (l_in | r_in) {
|
---|
767 | unsigned int i, ibit;
|
---|
768 | for (i = 0, ibit = 28; i < 8; i++, ibit -= 4) {
|
---|
769 | l |= ip_maskl[i][(l_in >> ibit) & 0xf] |
|
---|
770 | ip_maskl[i + 8][(r_in >> ibit) & 0xf];
|
---|
771 | r |= ip_maskr[i][(l_in >> ibit) & 0xf] |
|
---|
772 | ip_maskr[i + 8][(r_in >> ibit) & 0xf];
|
---|
773 | }
|
---|
774 | }
|
---|
775 |
|
---|
776 | while (count--) {
|
---|
777 | /*
|
---|
778 | * Do each round.
|
---|
779 | */
|
---|
780 | unsigned int round = 16;
|
---|
781 | const uint32_t *kl = ekey->l;
|
---|
782 | const uint32_t *kr = ekey->r;
|
---|
783 | uint32_t f;
|
---|
784 | while (round--) {
|
---|
785 | uint32_t r48l, r48r;
|
---|
786 | /*
|
---|
787 | * Expand R to 48 bits (simulate the E-box).
|
---|
788 | */
|
---|
789 | r48l = ((r & 0x00000001) << 23)
|
---|
790 | | ((r & 0xf8000000) >> 9)
|
---|
791 | | ((r & 0x1f800000) >> 11)
|
---|
792 | | ((r & 0x01f80000) >> 13)
|
---|
793 | | ((r & 0x001f8000) >> 15);
|
---|
794 |
|
---|
795 | r48r = ((r & 0x0001f800) << 7)
|
---|
796 | | ((r & 0x00001f80) << 5)
|
---|
797 | | ((r & 0x000001f8) << 3)
|
---|
798 | | ((r & 0x0000001f) << 1)
|
---|
799 | | ((r & 0x80000000) >> 31);
|
---|
800 | /*
|
---|
801 | * Do salting for crypt() and friends, and
|
---|
802 | * XOR with the permuted key.
|
---|
803 | */
|
---|
804 | f = (r48l ^ r48r) & saltbits;
|
---|
805 | r48l ^= f ^ *kl++;
|
---|
806 | r48r ^= f ^ *kr++;
|
---|
807 | /*
|
---|
808 | * Do S-box lookups (which shrink it back to 32 bits)
|
---|
809 | * and do the P-box permutation at the same time.
|
---|
810 | */
|
---|
811 | f = psbox[0][r48l >> 18]
|
---|
812 | | psbox[1][(r48l >> 12) & 0x3f]
|
---|
813 | | psbox[2][(r48l >> 6) & 0x3f]
|
---|
814 | | psbox[3][r48l & 0x3f]
|
---|
815 | | psbox[4][r48r >> 18]
|
---|
816 | | psbox[5][(r48r >> 12) & 0x3f]
|
---|
817 | | psbox[6][(r48r >> 6) & 0x3f]
|
---|
818 | | psbox[7][r48r & 0x3f];
|
---|
819 | /*
|
---|
820 | * Now that we've permuted things, complete f().
|
---|
821 | */
|
---|
822 | f ^= l;
|
---|
823 | l = r;
|
---|
824 | r = f;
|
---|
825 | }
|
---|
826 | r = l;
|
---|
827 | l = f;
|
---|
828 | }
|
---|
829 |
|
---|
830 | /*
|
---|
831 | * Do final permutation (inverse of IP).
|
---|
832 | */
|
---|
833 | {
|
---|
834 | unsigned int i, ibit;
|
---|
835 | uint32_t lo, ro;
|
---|
836 | lo = ro = 0;
|
---|
837 | for (i = 0, ibit = 28; i < 4; i++, ibit -= 4) {
|
---|
838 | ro |= fp_maskr[i][(l >> ibit) & 0xf] |
|
---|
839 | fp_maskr[i + 4][(r >> ibit) & 0xf];
|
---|
840 | ibit -= 4;
|
---|
841 | lo |= fp_maskl[i][(l >> ibit) & 0xf] |
|
---|
842 | fp_maskl[i + 4][(r >> ibit) & 0xf];
|
---|
843 | }
|
---|
844 | *l_out = lo;
|
---|
845 | *r_out = ro;
|
---|
846 | }
|
---|
847 | }
|
---|
848 |
|
---|
849 | static void des_cipher(const unsigned char *in, unsigned char *out,
|
---|
850 | uint32_t count, uint32_t saltbits, const struct expanded_key *ekey)
|
---|
851 | {
|
---|
852 | uint32_t l_out, r_out, rawl, rawr;
|
---|
853 |
|
---|
854 | rawl =
|
---|
855 | (uint32_t)in[3] |
|
---|
856 | ((uint32_t)in[2] << 8) |
|
---|
857 | ((uint32_t)in[1] << 16) |
|
---|
858 | ((uint32_t)in[0] << 24);
|
---|
859 | rawr =
|
---|
860 | (uint32_t)in[7] |
|
---|
861 | ((uint32_t)in[6] << 8) |
|
---|
862 | ((uint32_t)in[5] << 16) |
|
---|
863 | ((uint32_t)in[4] << 24);
|
---|
864 |
|
---|
865 | __do_des(rawl, rawr, &l_out, &r_out, count, saltbits, ekey);
|
---|
866 |
|
---|
867 | out[0] = l_out >> 24;
|
---|
868 | out[1] = l_out >> 16;
|
---|
869 | out[2] = l_out >> 8;
|
---|
870 | out[3] = l_out;
|
---|
871 | out[4] = r_out >> 24;
|
---|
872 | out[5] = r_out >> 16;
|
---|
873 | out[6] = r_out >> 8;
|
---|
874 | out[7] = r_out;
|
---|
875 | }
|
---|
876 |
|
---|
877 | static char *_crypt_extended_r_uut(const char *_key, const char *_setting, char *output)
|
---|
878 | {
|
---|
879 | const unsigned char *key = (const unsigned char *)_key;
|
---|
880 | const unsigned char *setting = (const unsigned char *)_setting;
|
---|
881 | struct expanded_key ekey;
|
---|
882 | unsigned char keybuf[8];
|
---|
883 | unsigned char *p, *q;
|
---|
884 | uint32_t count, salt, l, r0, r1;
|
---|
885 | unsigned int i;
|
---|
886 |
|
---|
887 | /*
|
---|
888 | * Copy the key, shifting each character left by one bit and padding
|
---|
889 | * with zeroes.
|
---|
890 | */
|
---|
891 | q = keybuf;
|
---|
892 | while (q <= &keybuf[sizeof(keybuf) - 1]) {
|
---|
893 | *q++ = *key << 1;
|
---|
894 | if (*key)
|
---|
895 | key++;
|
---|
896 | }
|
---|
897 | __des_setkey(keybuf, &ekey);
|
---|
898 |
|
---|
899 | if (*setting == _PASSWORD_EFMT1) {
|
---|
900 | /*
|
---|
901 | * "new"-style:
|
---|
902 | * setting - underscore, 4 chars of count, 4 chars of salt
|
---|
903 | * key - unlimited characters
|
---|
904 | */
|
---|
905 | for (i = 1, count = 0; i < 5; i++) {
|
---|
906 | uint32_t value = ascii_to_bin(setting[i]);
|
---|
907 | if (ascii64[value] != setting[i])
|
---|
908 | return NULL;
|
---|
909 | count |= value << (i - 1) * 6;
|
---|
910 | }
|
---|
911 | if (!count)
|
---|
912 | return NULL;
|
---|
913 |
|
---|
914 | for (i = 5, salt = 0; i < 9; i++) {
|
---|
915 | uint32_t value = ascii_to_bin(setting[i]);
|
---|
916 | if (ascii64[value] != setting[i])
|
---|
917 | return NULL;
|
---|
918 | salt |= value << (i - 5) * 6;
|
---|
919 | }
|
---|
920 |
|
---|
921 | while (*key) {
|
---|
922 | /*
|
---|
923 | * Encrypt the key with itself.
|
---|
924 | */
|
---|
925 | des_cipher(keybuf, keybuf, 1, 0, &ekey);
|
---|
926 | /*
|
---|
927 | * And XOR with the next 8 characters of the key.
|
---|
928 | */
|
---|
929 | q = keybuf;
|
---|
930 | while (q <= &keybuf[sizeof(keybuf) - 1] && *key)
|
---|
931 | *q++ ^= *key++ << 1;
|
---|
932 | __des_setkey(keybuf, &ekey);
|
---|
933 | }
|
---|
934 |
|
---|
935 | memcpy(output, setting, 9);
|
---|
936 | output[9] = '\0';
|
---|
937 | p = (unsigned char *)output + 9;
|
---|
938 | } else {
|
---|
939 | /*
|
---|
940 | * "old"-style:
|
---|
941 | * setting - 2 chars of salt
|
---|
942 | * key - up to 8 characters
|
---|
943 | */
|
---|
944 | count = 25;
|
---|
945 |
|
---|
946 | if (ascii_is_unsafe(setting[0]) || ascii_is_unsafe(setting[1]))
|
---|
947 | return NULL;
|
---|
948 |
|
---|
949 | salt = (ascii_to_bin(setting[1]) << 6)
|
---|
950 | | ascii_to_bin(setting[0]);
|
---|
951 |
|
---|
952 | output[0] = setting[0];
|
---|
953 | output[1] = setting[1];
|
---|
954 | p = (unsigned char *)output + 2;
|
---|
955 | }
|
---|
956 |
|
---|
957 | /*
|
---|
958 | * Do it.
|
---|
959 | */
|
---|
960 | __do_des(0, 0, &r0, &r1, count, setup_salt(salt), &ekey);
|
---|
961 |
|
---|
962 | /*
|
---|
963 | * Now encode the result...
|
---|
964 | */
|
---|
965 | l = (r0 >> 8);
|
---|
966 | *p++ = ascii64[(l >> 18) & 0x3f];
|
---|
967 | *p++ = ascii64[(l >> 12) & 0x3f];
|
---|
968 | *p++ = ascii64[(l >> 6) & 0x3f];
|
---|
969 | *p++ = ascii64[l & 0x3f];
|
---|
970 |
|
---|
971 | l = (r0 << 16) | ((r1 >> 16) & 0xffff);
|
---|
972 | *p++ = ascii64[(l >> 18) & 0x3f];
|
---|
973 | *p++ = ascii64[(l >> 12) & 0x3f];
|
---|
974 | *p++ = ascii64[(l >> 6) & 0x3f];
|
---|
975 | *p++ = ascii64[l & 0x3f];
|
---|
976 |
|
---|
977 | l = r1 << 2;
|
---|
978 | *p++ = ascii64[(l >> 12) & 0x3f];
|
---|
979 | *p++ = ascii64[(l >> 6) & 0x3f];
|
---|
980 | *p++ = ascii64[l & 0x3f];
|
---|
981 | *p = 0;
|
---|
982 |
|
---|
983 | return output;
|
---|
984 | }
|
---|
985 |
|
---|
986 | char *__crypt_des(const char *key, const char *setting, char *output)
|
---|
987 | {
|
---|
988 | const char *test_key = "\x80\xff\x80\x01 "
|
---|
989 | "\x7f\x81\x80\x80\x0d\x0a\xff\x7f \x81 test";
|
---|
990 | const char *test_setting = "_0.../9Zz";
|
---|
991 | const char *test_hash = "_0.../9ZzX7iSJNd21sU";
|
---|
992 | char test_buf[21];
|
---|
993 | char *retval;
|
---|
994 | const char *p;
|
---|
995 |
|
---|
996 | if (*setting != _PASSWORD_EFMT1) {
|
---|
997 | test_setting = "\x80x";
|
---|
998 | test_hash = "\x80x22/wK52ZKGA";
|
---|
999 | }
|
---|
1000 |
|
---|
1001 | /*
|
---|
1002 | * Hash the supplied password.
|
---|
1003 | */
|
---|
1004 | retval = _crypt_extended_r_uut(key, setting, output);
|
---|
1005 |
|
---|
1006 | /*
|
---|
1007 | * Perform a quick self-test. It is important that we make both calls
|
---|
1008 | * to _crypt_extended_r_uut() from the same scope such that they likely
|
---|
1009 | * use the same stack locations, which makes the second call overwrite
|
---|
1010 | * the first call's sensitive data on the stack and makes it more
|
---|
1011 | * likely that any alignment related issues would be detected.
|
---|
1012 | */
|
---|
1013 | p = _crypt_extended_r_uut(test_key, test_setting, test_buf);
|
---|
1014 | if (p && !strcmp(p, test_hash) && retval)
|
---|
1015 | return retval;
|
---|
1016 |
|
---|
1017 | return (setting[0]=='*') ? "x" : "*";
|
---|
1018 | }
|
---|