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| 1 /* |
| 2 * This version has been further modified by Rich Felker, primary author |
| 3 * and maintainer of musl libc, to remove table generation code and |
| 4 * replaced all runtime-generated constant tables with static-initialized |
| 5 * tables in the binary, in the interest of minimizing non-shareable |
| 6 * memory usage and stack size requirements. |
| 7 */ |
| 8 /* |
| 9 * This version is derived from the original implementation of FreeSec |
| 10 * (release 1.1) by David Burren. I've made it reentrant, reduced its memory |
| 11 * usage from about 70 KB to about 7 KB (with only minimal performance impact |
| 12 * and keeping code size about the same), made the handling of invalid salts |
| 13 * mostly UFC-crypt compatible, added a quick runtime self-test (which also |
| 14 * serves to zeroize the stack from sensitive data), and added optional tests. |
| 15 * - Solar Designer <solar at openwall.com> |
| 16 */ |
| 17 |
| 18 /* |
| 19 * FreeSec: libcrypt for NetBSD |
| 20 * |
| 21 * Copyright (c) 1994 David Burren |
| 22 * Copyright (c) 2000,2002,2010,2012 Solar Designer |
| 23 * All rights reserved. |
| 24 * |
| 25 * Redistribution and use in source and binary forms, with or without |
| 26 * modification, are permitted provided that the following conditions |
| 27 * are met: |
| 28 * 1. Redistributions of source code must retain the above copyright |
| 29 * notice, this list of conditions and the following disclaimer. |
| 30 * 2. Redistributions in binary form must reproduce the above copyright |
| 31 * notice, this list of conditions and the following disclaimer in the |
| 32 * documentation and/or other materials provided with the distribution. |
| 33 * 3. Neither the name of the author nor the names of other contributors |
| 34 * may be used to endorse or promote products derived from this software |
| 35 * without specific prior written permission. |
| 36 * |
| 37 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 38 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 40 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 43 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 45 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 46 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 47 * SUCH DAMAGE. |
| 48 * |
| 49 * $Owl: Owl/packages/glibc/crypt_freesec.c,v 1.6 2010/02/20 14:45:06 solar
Exp $ |
| 50 * $Id: crypt.c,v 1.15 1994/09/13 04:58:49 davidb Exp $ |
| 51 * |
| 52 * This is an original implementation of the DES and the crypt(3) interfaces |
| 53 * by David Burren. It has been heavily re-worked by Solar Designer. |
| 54 */ |
| 55 |
| 56 #include <stdint.h> |
| 57 #include <string.h> |
| 58 |
| 59 struct expanded_key { |
| 60 uint32_t l[16], r[16]; |
| 61 }; |
| 62 |
| 63 #define _PASSWORD_EFMT1 '_' |
| 64 |
| 65 static const unsigned char key_shifts[16] = { |
| 66 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 |
| 67 }; |
| 68 |
| 69 static const uint32_t psbox[8][64] = { |
| 70 { |
| 71 0x00808200,0x00000000,0x00008000,0x00808202, |
| 72 0x00808002,0x00008202,0x00000002,0x00008000, |
| 73 0x00000200,0x00808200,0x00808202,0x00000200, |
| 74 0x00800202,0x00808002,0x00800000,0x00000002, |
| 75 0x00000202,0x00800200,0x00800200,0x00008200, |
| 76 0x00008200,0x00808000,0x00808000,0x00800202, |
| 77 0x00008002,0x00800002,0x00800002,0x00008002, |
| 78 0x00000000,0x00000202,0x00008202,0x00800000, |
| 79 0x00008000,0x00808202,0x00000002,0x00808000, |
| 80 0x00808200,0x00800000,0x00800000,0x00000200, |
| 81 0x00808002,0x00008000,0x00008200,0x00800002, |
| 82 0x00000200,0x00000002,0x00800202,0x00008202, |
| 83 0x00808202,0x00008002,0x00808000,0x00800202, |
| 84 0x00800002,0x00000202,0x00008202,0x00808200, |
| 85 0x00000202,0x00800200,0x00800200,0x00000000, |
| 86 0x00008002,0x00008200,0x00000000,0x00808002, |
| 87 },{ |
| 88 0x40084010,0x40004000,0x00004000,0x00084010, |
| 89 0x00080000,0x00000010,0x40080010,0x40004010, |
| 90 0x40000010,0x40084010,0x40084000,0x40000000, |
| 91 0x40004000,0x00080000,0x00000010,0x40080010, |
| 92 0x00084000,0x00080010,0x40004010,0x00000000, |
| 93 0x40000000,0x00004000,0x00084010,0x40080000, |
| 94 0x00080010,0x40000010,0x00000000,0x00084000, |
| 95 0x00004010,0x40084000,0x40080000,0x00004010, |
| 96 0x00000000,0x00084010,0x40080010,0x00080000, |
| 97 0x40004010,0x40080000,0x40084000,0x00004000, |
| 98 0x40080000,0x40004000,0x00000010,0x40084010, |
| 99 0x00084010,0x00000010,0x00004000,0x40000000, |
| 100 0x00004010,0x40084000,0x00080000,0x40000010, |
| 101 0x00080010,0x40004010,0x40000010,0x00080010, |
| 102 0x00084000,0x00000000,0x40004000,0x00004010, |
| 103 0x40000000,0x40080010,0x40084010,0x00084000, |
| 104 },{ |
| 105 0x00000104,0x04010100,0x00000000,0x04010004, |
| 106 0x04000100,0x00000000,0x00010104,0x04000100, |
| 107 0x00010004,0x04000004,0x04000004,0x00010000, |
| 108 0x04010104,0x00010004,0x04010000,0x00000104, |
| 109 0x04000000,0x00000004,0x04010100,0x00000100, |
| 110 0x00010100,0x04010000,0x04010004,0x00010104, |
| 111 0x04000104,0x00010100,0x00010000,0x04000104, |
| 112 0x00000004,0x04010104,0x00000100,0x04000000, |
| 113 0x04010100,0x04000000,0x00010004,0x00000104, |
| 114 0x00010000,0x04010100,0x04000100,0x00000000, |
| 115 0x00000100,0x00010004,0x04010104,0x04000100, |
| 116 0x04000004,0x00000100,0x00000000,0x04010004, |
| 117 0x04000104,0x00010000,0x04000000,0x04010104, |
| 118 0x00000004,0x00010104,0x00010100,0x04000004, |
| 119 0x04010000,0x04000104,0x00000104,0x04010000, |
| 120 0x00010104,0x00000004,0x04010004,0x00010100, |
| 121 },{ |
| 122 0x80401000,0x80001040,0x80001040,0x00000040, |
| 123 0x00401040,0x80400040,0x80400000,0x80001000, |
| 124 0x00000000,0x00401000,0x00401000,0x80401040, |
| 125 0x80000040,0x00000000,0x00400040,0x80400000, |
| 126 0x80000000,0x00001000,0x00400000,0x80401000, |
| 127 0x00000040,0x00400000,0x80001000,0x00001040, |
| 128 0x80400040,0x80000000,0x00001040,0x00400040, |
| 129 0x00001000,0x00401040,0x80401040,0x80000040, |
| 130 0x00400040,0x80400000,0x00401000,0x80401040, |
| 131 0x80000040,0x00000000,0x00000000,0x00401000, |
| 132 0x00001040,0x00400040,0x80400040,0x80000000, |
| 133 0x80401000,0x80001040,0x80001040,0x00000040, |
| 134 0x80401040,0x80000040,0x80000000,0x00001000, |
| 135 0x80400000,0x80001000,0x00401040,0x80400040, |
| 136 0x80001000,0x00001040,0x00400000,0x80401000, |
| 137 0x00000040,0x00400000,0x00001000,0x00401040, |
| 138 },{ |
| 139 0x00000080,0x01040080,0x01040000,0x21000080, |
| 140 0x00040000,0x00000080,0x20000000,0x01040000, |
| 141 0x20040080,0x00040000,0x01000080,0x20040080, |
| 142 0x21000080,0x21040000,0x00040080,0x20000000, |
| 143 0x01000000,0x20040000,0x20040000,0x00000000, |
| 144 0x20000080,0x21040080,0x21040080,0x01000080, |
| 145 0x21040000,0x20000080,0x00000000,0x21000000, |
| 146 0x01040080,0x01000000,0x21000000,0x00040080, |
| 147 0x00040000,0x21000080,0x00000080,0x01000000, |
| 148 0x20000000,0x01040000,0x21000080,0x20040080, |
| 149 0x01000080,0x20000000,0x21040000,0x01040080, |
| 150 0x20040080,0x00000080,0x01000000,0x21040000, |
| 151 0x21040080,0x00040080,0x21000000,0x21040080, |
| 152 0x01040000,0x00000000,0x20040000,0x21000000, |
| 153 0x00040080,0x01000080,0x20000080,0x00040000, |
| 154 0x00000000,0x20040000,0x01040080,0x20000080, |
| 155 },{ |
| 156 0x10000008,0x10200000,0x00002000,0x10202008, |
| 157 0x10200000,0x00000008,0x10202008,0x00200000, |
| 158 0x10002000,0x00202008,0x00200000,0x10000008, |
| 159 0x00200008,0x10002000,0x10000000,0x00002008, |
| 160 0x00000000,0x00200008,0x10002008,0x00002000, |
| 161 0x00202000,0x10002008,0x00000008,0x10200008, |
| 162 0x10200008,0x00000000,0x00202008,0x10202000, |
| 163 0x00002008,0x00202000,0x10202000,0x10000000, |
| 164 0x10002000,0x00000008,0x10200008,0x00202000, |
| 165 0x10202008,0x00200000,0x00002008,0x10000008, |
| 166 0x00200000,0x10002000,0x10000000,0x00002008, |
| 167 0x10000008,0x10202008,0x00202000,0x10200000, |
| 168 0x00202008,0x10202000,0x00000000,0x10200008, |
| 169 0x00000008,0x00002000,0x10200000,0x00202008, |
| 170 0x00002000,0x00200008,0x10002008,0x00000000, |
| 171 0x10202000,0x10000000,0x00200008,0x10002008, |
| 172 },{ |
| 173 0x00100000,0x02100001,0x02000401,0x00000000, |
| 174 0x00000400,0x02000401,0x00100401,0x02100400, |
| 175 0x02100401,0x00100000,0x00000000,0x02000001, |
| 176 0x00000001,0x02000000,0x02100001,0x00000401, |
| 177 0x02000400,0x00100401,0x00100001,0x02000400, |
| 178 0x02000001,0x02100000,0x02100400,0x00100001, |
| 179 0x02100000,0x00000400,0x00000401,0x02100401, |
| 180 0x00100400,0x00000001,0x02000000,0x00100400, |
| 181 0x02000000,0x00100400,0x00100000,0x02000401, |
| 182 0x02000401,0x02100001,0x02100001,0x00000001, |
| 183 0x00100001,0x02000000,0x02000400,0x00100000, |
| 184 0x02100400,0x00000401,0x00100401,0x02100400, |
| 185 0x00000401,0x02000001,0x02100401,0x02100000, |
| 186 0x00100400,0x00000000,0x00000001,0x02100401, |
| 187 0x00000000,0x00100401,0x02100000,0x00000400, |
| 188 0x02000001,0x02000400,0x00000400,0x00100001, |
| 189 },{ |
| 190 0x08000820,0x00000800,0x00020000,0x08020820, |
| 191 0x08000000,0x08000820,0x00000020,0x08000000, |
| 192 0x00020020,0x08020000,0x08020820,0x00020800, |
| 193 0x08020800,0x00020820,0x00000800,0x00000020, |
| 194 0x08020000,0x08000020,0x08000800,0x00000820, |
| 195 0x00020800,0x00020020,0x08020020,0x08020800, |
| 196 0x00000820,0x00000000,0x00000000,0x08020020, |
| 197 0x08000020,0x08000800,0x00020820,0x00020000, |
| 198 0x00020820,0x00020000,0x08020800,0x00000800, |
| 199 0x00000020,0x08020020,0x00000800,0x00020820, |
| 200 0x08000800,0x00000020,0x08000020,0x08020000, |
| 201 0x08020020,0x08000000,0x00020000,0x08000820, |
| 202 0x00000000,0x08020820,0x00020020,0x08000020, |
| 203 0x08020000,0x08000800,0x08000820,0x00000000, |
| 204 0x08020820,0x00020800,0x00020800,0x00000820, |
| 205 0x00000820,0x00020020,0x08000000,0x08020800, |
| 206 }, |
| 207 }; |
| 208 static const uint32_t ip_maskl[16][16] = { |
| 209 { |
| 210 0x00000000,0x00010000,0x00000000,0x00010000, |
| 211 0x01000000,0x01010000,0x01000000,0x01010000, |
| 212 0x00000000,0x00010000,0x00000000,0x00010000, |
| 213 0x01000000,0x01010000,0x01000000,0x01010000, |
| 214 },{ |
| 215 0x00000000,0x00000001,0x00000000,0x00000001, |
| 216 0x00000100,0x00000101,0x00000100,0x00000101, |
| 217 0x00000000,0x00000001,0x00000000,0x00000001, |
| 218 0x00000100,0x00000101,0x00000100,0x00000101, |
| 219 },{ |
| 220 0x00000000,0x00020000,0x00000000,0x00020000, |
| 221 0x02000000,0x02020000,0x02000000,0x02020000, |
| 222 0x00000000,0x00020000,0x00000000,0x00020000, |
| 223 0x02000000,0x02020000,0x02000000,0x02020000, |
| 224 },{ |
| 225 0x00000000,0x00000002,0x00000000,0x00000002, |
| 226 0x00000200,0x00000202,0x00000200,0x00000202, |
| 227 0x00000000,0x00000002,0x00000000,0x00000002, |
| 228 0x00000200,0x00000202,0x00000200,0x00000202, |
| 229 },{ |
| 230 0x00000000,0x00040000,0x00000000,0x00040000, |
| 231 0x04000000,0x04040000,0x04000000,0x04040000, |
| 232 0x00000000,0x00040000,0x00000000,0x00040000, |
| 233 0x04000000,0x04040000,0x04000000,0x04040000, |
| 234 },{ |
| 235 0x00000000,0x00000004,0x00000000,0x00000004, |
| 236 0x00000400,0x00000404,0x00000400,0x00000404, |
| 237 0x00000000,0x00000004,0x00000000,0x00000004, |
| 238 0x00000400,0x00000404,0x00000400,0x00000404, |
| 239 },{ |
| 240 0x00000000,0x00080000,0x00000000,0x00080000, |
| 241 0x08000000,0x08080000,0x08000000,0x08080000, |
| 242 0x00000000,0x00080000,0x00000000,0x00080000, |
| 243 0x08000000,0x08080000,0x08000000,0x08080000, |
| 244 },{ |
| 245 0x00000000,0x00000008,0x00000000,0x00000008, |
| 246 0x00000800,0x00000808,0x00000800,0x00000808, |
| 247 0x00000000,0x00000008,0x00000000,0x00000008, |
| 248 0x00000800,0x00000808,0x00000800,0x00000808, |
| 249 },{ |
| 250 0x00000000,0x00100000,0x00000000,0x00100000, |
| 251 0x10000000,0x10100000,0x10000000,0x10100000, |
| 252 0x00000000,0x00100000,0x00000000,0x00100000, |
| 253 0x10000000,0x10100000,0x10000000,0x10100000, |
| 254 },{ |
| 255 0x00000000,0x00000010,0x00000000,0x00000010, |
| 256 0x00001000,0x00001010,0x00001000,0x00001010, |
| 257 0x00000000,0x00000010,0x00000000,0x00000010, |
| 258 0x00001000,0x00001010,0x00001000,0x00001010, |
| 259 },{ |
| 260 0x00000000,0x00200000,0x00000000,0x00200000, |
| 261 0x20000000,0x20200000,0x20000000,0x20200000, |
| 262 0x00000000,0x00200000,0x00000000,0x00200000, |
| 263 0x20000000,0x20200000,0x20000000,0x20200000, |
| 264 },{ |
| 265 0x00000000,0x00000020,0x00000000,0x00000020, |
| 266 0x00002000,0x00002020,0x00002000,0x00002020, |
| 267 0x00000000,0x00000020,0x00000000,0x00000020, |
| 268 0x00002000,0x00002020,0x00002000,0x00002020, |
| 269 },{ |
| 270 0x00000000,0x00400000,0x00000000,0x00400000, |
| 271 0x40000000,0x40400000,0x40000000,0x40400000, |
| 272 0x00000000,0x00400000,0x00000000,0x00400000, |
| 273 0x40000000,0x40400000,0x40000000,0x40400000, |
| 274 },{ |
| 275 0x00000000,0x00000040,0x00000000,0x00000040, |
| 276 0x00004000,0x00004040,0x00004000,0x00004040, |
| 277 0x00000000,0x00000040,0x00000000,0x00000040, |
| 278 0x00004000,0x00004040,0x00004000,0x00004040, |
| 279 },{ |
| 280 0x00000000,0x00800000,0x00000000,0x00800000, |
| 281 0x80000000,0x80800000,0x80000000,0x80800000, |
| 282 0x00000000,0x00800000,0x00000000,0x00800000, |
| 283 0x80000000,0x80800000,0x80000000,0x80800000, |
| 284 },{ |
| 285 0x00000000,0x00000080,0x00000000,0x00000080, |
| 286 0x00008000,0x00008080,0x00008000,0x00008080, |
| 287 0x00000000,0x00000080,0x00000000,0x00000080, |
| 288 0x00008000,0x00008080,0x00008000,0x00008080, |
| 289 }, |
| 290 }; |
| 291 static const uint32_t ip_maskr[16][16] = { |
| 292 { |
| 293 0x00000000,0x00000000,0x00010000,0x00010000, |
| 294 0x00000000,0x00000000,0x00010000,0x00010000, |
| 295 0x01000000,0x01000000,0x01010000,0x01010000, |
| 296 0x01000000,0x01000000,0x01010000,0x01010000, |
| 297 },{ |
| 298 0x00000000,0x00000000,0x00000001,0x00000001, |
| 299 0x00000000,0x00000000,0x00000001,0x00000001, |
| 300 0x00000100,0x00000100,0x00000101,0x00000101, |
| 301 0x00000100,0x00000100,0x00000101,0x00000101, |
| 302 },{ |
| 303 0x00000000,0x00000000,0x00020000,0x00020000, |
| 304 0x00000000,0x00000000,0x00020000,0x00020000, |
| 305 0x02000000,0x02000000,0x02020000,0x02020000, |
| 306 0x02000000,0x02000000,0x02020000,0x02020000, |
| 307 },{ |
| 308 0x00000000,0x00000000,0x00000002,0x00000002, |
| 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 } |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1573973002:
Add a "fork" of musl as //fusl. (Closed)
Base URL: https://github.com/domokit/mojo.git@master