xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Copyright (c) 1997-2016 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <assert.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <stdint.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <rpc/rpc.h> |
| 26 | #include <rpcsvc/nis.h> |
| 27 | |
| 28 | #define DEFAULT_TTL 43200 |
| 29 | |
| 30 | /* |
| 31 | ** Some functions for parsing the -D param and NIS_DEFAULTS Environ |
| 32 | */ |
| 33 | static nis_name |
| 34 | searchXYX (char *str, const char *what) |
| 35 | { |
| 36 | assert (strlen (what) == 6); |
| 37 | assert (strncmp (str, what, 6) == 0); |
| 38 | str += 6; /* Points to the begin of the parameters. */ |
| 39 | |
| 40 | int i = 0; |
| 41 | while (str[i] != '\0' && str[i] != ':') |
| 42 | ++i; |
| 43 | if (i == 0) /* only "<WHAT>=" ? */ |
| 44 | return strdup (""); |
| 45 | |
| 46 | return strndup (str, i); |
| 47 | } |
| 48 | |
| 49 | |
| 50 | static nis_name |
| 51 | searchgroup (char *str) |
| 52 | { |
| 53 | return searchXYX (str, "group="); |
| 54 | } |
| 55 | |
| 56 | |
| 57 | static nis_name |
| 58 | searchowner (char *str) |
| 59 | { |
| 60 | return searchXYX (str, "owner="); |
| 61 | } |
| 62 | |
| 63 | |
| 64 | static uint32_t |
| 65 | searchttl (char *str) |
| 66 | { |
| 67 | char buf[strlen (str) + 1]; |
| 68 | char *cptr, *dptr; |
| 69 | uint32_t time; |
| 70 | int i; |
| 71 | |
| 72 | dptr = strstr (str, "ttl="); |
| 73 | if (dptr == NULL) /* should (could) not happen */ |
| 74 | return DEFAULT_TTL;; |
| 75 | |
| 76 | dptr += 4; /* points to the begin of the new ttl */ |
| 77 | i = 0; |
| 78 | while (dptr[i] != '\0' && dptr[i] != ':') |
| 79 | i++; |
| 80 | if (i == 0) /* only "ttl=" ? */ |
| 81 | return DEFAULT_TTL; |
| 82 | |
| 83 | strncpy (buf, dptr, i); |
| 84 | buf[i] = '\0'; |
| 85 | time = 0; |
| 86 | |
| 87 | dptr = buf; |
| 88 | cptr = strchr (dptr, 'd'); |
| 89 | if (cptr != NULL) |
| 90 | { |
| 91 | *cptr = '\0'; |
| 92 | cptr++; |
| 93 | time += atoi (dptr) * 60 * 60 * 24; |
| 94 | dptr = cptr; |
| 95 | } |
| 96 | |
| 97 | cptr = strchr (dptr, 'h'); |
| 98 | if (cptr != NULL) |
| 99 | { |
| 100 | *cptr = '\0'; |
| 101 | cptr++; |
| 102 | time += atoi (dptr) * 60 * 60; |
| 103 | dptr = cptr; |
| 104 | } |
| 105 | |
| 106 | cptr = strchr (dptr, 'm'); |
| 107 | if (cptr != NULL) |
| 108 | { |
| 109 | *cptr = '\0'; |
| 110 | cptr++; |
| 111 | time += atoi (dptr) * 60; |
| 112 | dptr = cptr; |
| 113 | } |
| 114 | |
| 115 | cptr = strchr (dptr, 's'); |
| 116 | if (cptr != NULL) |
| 117 | *cptr = '\0'; |
| 118 | |
| 119 | time += atoi (dptr); |
| 120 | |
| 121 | return time; |
| 122 | } |
| 123 | |
| 124 | static unsigned int |
| 125 | searchaccess (char *str, unsigned int access) |
| 126 | { |
| 127 | char buf[strlen (str) + 1]; |
| 128 | char *cptr; |
| 129 | unsigned int result = access; |
| 130 | int i; |
| 131 | int n, o, g, w; |
| 132 | |
| 133 | cptr = strstr (str, "access="); |
| 134 | if (cptr == NULL) |
| 135 | return 0; |
| 136 | |
| 137 | cptr += 7; /* points to the begin of the access string */ |
| 138 | i = 0; |
| 139 | while (cptr[i] != '\0' && cptr[i] != ':') |
| 140 | i++; |
| 141 | if (i == 0) /* only "access=" ? */ |
| 142 | return 0; |
| 143 | |
| 144 | strncpy (buf, cptr, i); |
| 145 | buf[i] = '\0'; |
| 146 | |
| 147 | n = o = g = w = 0; |
| 148 | cptr = buf; |
| 149 | if (*cptr == ',') /* Fix for stupid Solaris scripts */ |
| 150 | ++cptr; |
| 151 | while (*cptr != '\0') |
| 152 | { |
| 153 | switch (*cptr) |
| 154 | { |
| 155 | case 'n': |
| 156 | n = 1; |
| 157 | break; |
| 158 | case 'o': |
| 159 | o = 1; |
| 160 | break; |
| 161 | case 'g': |
| 162 | g = 1; |
| 163 | break; |
| 164 | case 'w': |
| 165 | w = 1; |
| 166 | break; |
| 167 | case 'a': |
| 168 | o = g = w = 1; |
| 169 | break; |
| 170 | case '-': |
| 171 | cptr++; /* Remove "-" from beginning */ |
| 172 | while (*cptr != '\0' && *cptr != ',') |
| 173 | { |
| 174 | switch (*cptr) |
| 175 | { |
| 176 | case 'r': |
| 177 | if (n) |
| 178 | result = result & ~(NIS_READ_ACC << 24); |
| 179 | if (o) |
| 180 | result = result & ~(NIS_READ_ACC << 16); |
| 181 | if (g) |
| 182 | result = result & ~(NIS_READ_ACC << 8); |
| 183 | if (w) |
| 184 | result = result & ~(NIS_READ_ACC); |
| 185 | break; |
| 186 | case 'm': |
| 187 | if (n) |
| 188 | result = result & ~(NIS_MODIFY_ACC << 24); |
| 189 | if (o) |
| 190 | result = result & ~(NIS_MODIFY_ACC << 16); |
| 191 | if (g) |
| 192 | result = result & ~(NIS_MODIFY_ACC << 8); |
| 193 | if (w) |
| 194 | result = result & ~(NIS_MODIFY_ACC); |
| 195 | break; |
| 196 | case 'c': |
| 197 | if (n) |
| 198 | result = result & ~(NIS_CREATE_ACC << 24); |
| 199 | if (o) |
| 200 | result = result & ~(NIS_CREATE_ACC << 16); |
| 201 | if (g) |
| 202 | result = result & ~(NIS_CREATE_ACC << 8); |
| 203 | if (w) |
| 204 | result = result & ~(NIS_CREATE_ACC); |
| 205 | break; |
| 206 | case 'd': |
| 207 | if (n) |
| 208 | result = result & ~(NIS_DESTROY_ACC << 24); |
| 209 | if (o) |
| 210 | result = result & ~(NIS_DESTROY_ACC << 16); |
| 211 | if (g) |
| 212 | result = result & ~(NIS_DESTROY_ACC << 8); |
| 213 | if (w) |
| 214 | result = result & ~(NIS_DESTROY_ACC); |
| 215 | break; |
| 216 | default: |
| 217 | return (~0U); |
| 218 | } |
| 219 | cptr++; |
| 220 | } |
| 221 | n = o = g = w = 0; |
| 222 | break; |
| 223 | case '+': |
| 224 | cptr++; /* Remove "+" from beginning */ |
| 225 | while (*cptr != '\0' && *cptr != ',') |
| 226 | { |
| 227 | switch (*cptr) |
| 228 | { |
| 229 | case 'r': |
| 230 | if (n) |
| 231 | result = result | (NIS_READ_ACC << 24); |
| 232 | if (o) |
| 233 | result = result | (NIS_READ_ACC << 16); |
| 234 | if (g) |
| 235 | result = result | (NIS_READ_ACC << 8); |
| 236 | if (w) |
| 237 | result = result | (NIS_READ_ACC); |
| 238 | break; |
| 239 | case 'm': |
| 240 | if (n) |
| 241 | result = result | (NIS_MODIFY_ACC << 24); |
| 242 | if (o) |
| 243 | result = result | (NIS_MODIFY_ACC << 16); |
| 244 | if (g) |
| 245 | result = result | (NIS_MODIFY_ACC << 8); |
| 246 | if (w) |
| 247 | result = result | (NIS_MODIFY_ACC); |
| 248 | break; |
| 249 | case 'c': |
| 250 | if (n) |
| 251 | result = result | (NIS_CREATE_ACC << 24); |
| 252 | if (o) |
| 253 | result = result | (NIS_CREATE_ACC << 16); |
| 254 | if (g) |
| 255 | result = result | (NIS_CREATE_ACC << 8); |
| 256 | if (w) |
| 257 | result = result | (NIS_CREATE_ACC); |
| 258 | break; |
| 259 | case 'd': |
| 260 | if (n) |
| 261 | result = result | (NIS_DESTROY_ACC << 24); |
| 262 | if (o) |
| 263 | result = result | (NIS_DESTROY_ACC << 16); |
| 264 | if (g) |
| 265 | result = result | (NIS_DESTROY_ACC << 8); |
| 266 | if (w) |
| 267 | result = result | (NIS_DESTROY_ACC); |
| 268 | break; |
| 269 | default: |
| 270 | return (~0U); |
| 271 | } |
| 272 | cptr++; |
| 273 | } |
| 274 | n = o = g = w = 0; |
| 275 | break; |
| 276 | case '=': |
| 277 | cptr++; /* Remove "=" from beginning */ |
| 278 | /* Clear */ |
| 279 | if (n) |
| 280 | result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC + |
| 281 | NIS_CREATE_ACC + NIS_DESTROY_ACC) << 24); |
| 282 | |
| 283 | if (o) |
| 284 | result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC + |
| 285 | NIS_CREATE_ACC + NIS_DESTROY_ACC) << 16); |
| 286 | if (g) |
| 287 | result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC + |
| 288 | NIS_CREATE_ACC + NIS_DESTROY_ACC) << 8); |
| 289 | if (w) |
| 290 | result = result & ~(NIS_READ_ACC + NIS_MODIFY_ACC + |
| 291 | NIS_CREATE_ACC + NIS_DESTROY_ACC); |
| 292 | while (*cptr != '\0' && *cptr != ',') |
| 293 | { |
| 294 | switch (*cptr) |
| 295 | { |
| 296 | case 'r': |
| 297 | if (n) |
| 298 | result = result | (NIS_READ_ACC << 24); |
| 299 | if (o) |
| 300 | result = result | (NIS_READ_ACC << 16); |
| 301 | if (g) |
| 302 | result = result | (NIS_READ_ACC << 8); |
| 303 | if (w) |
| 304 | result = result | (NIS_READ_ACC); |
| 305 | break; |
| 306 | case 'm': |
| 307 | if (n) |
| 308 | result = result | (NIS_MODIFY_ACC << 24); |
| 309 | if (o) |
| 310 | result = result | (NIS_MODIFY_ACC << 16); |
| 311 | if (g) |
| 312 | result = result | (NIS_MODIFY_ACC << 8); |
| 313 | if (w) |
| 314 | result = result | (NIS_MODIFY_ACC); |
| 315 | break; |
| 316 | case 'c': |
| 317 | if (n) |
| 318 | result = result | (NIS_CREATE_ACC << 24); |
| 319 | if (o) |
| 320 | result = result | (NIS_CREATE_ACC << 16); |
| 321 | if (g) |
| 322 | result = result | (NIS_CREATE_ACC << 8); |
| 323 | if (w) |
| 324 | result = result | (NIS_CREATE_ACC); |
| 325 | break; |
| 326 | case 'd': |
| 327 | if (n) |
| 328 | result = result | (NIS_DESTROY_ACC << 24); |
| 329 | if (o) |
| 330 | result = result | (NIS_DESTROY_ACC << 16); |
| 331 | if (g) |
| 332 | result = result | (NIS_DESTROY_ACC << 8); |
| 333 | if (w) |
| 334 | result = result | (NIS_DESTROY_ACC); |
| 335 | break; |
| 336 | default: |
| 337 | return result = (~0U); |
| 338 | } |
| 339 | cptr++; |
| 340 | } |
| 341 | n = o = g = w = 0; |
| 342 | break; |
| 343 | default: |
| 344 | return result = (~0U); |
| 345 | } |
| 346 | if (*cptr != '\0') |
| 347 | cptr++; |
| 348 | } |
| 349 | |
| 350 | return result; |
| 351 | } |
| 352 | |
| 353 | |
| 354 | nis_name |
| 355 | __nis_default_owner (char *defaults) |
| 356 | { |
| 357 | char *default_owner = NULL; |
| 358 | |
| 359 | char *cptr = defaults; |
| 360 | if (cptr == NULL) |
| 361 | cptr = getenv ("NIS_DEFAULTS"); |
| 362 | |
| 363 | if (cptr != NULL) |
| 364 | { |
| 365 | char *dptr = strstr (cptr, "owner="); |
| 366 | if (dptr != NULL) |
| 367 | { |
| 368 | char *p = searchowner (dptr); |
| 369 | if (p == NULL) |
| 370 | return NULL; |
| 371 | default_owner = strdupa (p); |
| 372 | free (p); |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | return strdup (default_owner ?: nis_local_principal ()); |
| 377 | } |
| 378 | libnsl_hidden_def (__nis_default_owner) |
| 379 | |
| 380 | |
| 381 | nis_name |
| 382 | __nis_default_group (char *defaults) |
| 383 | { |
| 384 | char *default_group = NULL; |
| 385 | |
| 386 | char *cptr = defaults; |
| 387 | if (cptr == NULL) |
| 388 | cptr = getenv ("NIS_DEFAULTS"); |
| 389 | |
| 390 | if (cptr != NULL) |
| 391 | { |
| 392 | char *dptr = strstr (cptr, "group="); |
| 393 | if (dptr != NULL) |
| 394 | { |
| 395 | char *p = searchgroup (dptr); |
| 396 | if (p == NULL) |
| 397 | return NULL; |
| 398 | default_group = strdupa (p); |
| 399 | free (p); |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | return strdup (default_group ?: nis_local_group ()); |
| 404 | } |
| 405 | libnsl_hidden_def (__nis_default_group) |
| 406 | |
| 407 | |
| 408 | uint32_t |
| 409 | __nis_default_ttl (char *defaults) |
| 410 | { |
| 411 | char *cptr, *dptr; |
| 412 | |
| 413 | if (defaults != NULL) |
| 414 | { |
| 415 | dptr = strstr (defaults, "ttl="); |
| 416 | if (dptr != NULL) |
| 417 | return searchttl (defaults); |
| 418 | } |
| 419 | |
| 420 | cptr = getenv ("NIS_DEFAULTS"); |
| 421 | if (cptr == NULL) |
| 422 | return DEFAULT_TTL; |
| 423 | |
| 424 | dptr = strstr (cptr, "ttl="); |
| 425 | if (dptr == NULL) |
| 426 | return DEFAULT_TTL; |
| 427 | |
| 428 | return searchttl (cptr); |
| 429 | } |
| 430 | |
| 431 | /* Default access rights are ----rmcdr---r---, but we could change |
| 432 | this with the NIS_DEFAULTS variable. */ |
| 433 | unsigned int |
| 434 | __nis_default_access (char *param, unsigned int defaults) |
| 435 | { |
| 436 | unsigned int result; |
| 437 | char *cptr; |
| 438 | |
| 439 | if (defaults == 0) |
| 440 | result = 0 | OWNER_DEFAULT | GROUP_DEFAULT | WORLD_DEFAULT; |
| 441 | else |
| 442 | result = defaults; |
| 443 | |
| 444 | if (param != NULL && strstr (param, "access=") != NULL) |
| 445 | result = searchaccess (param, result); |
| 446 | else |
| 447 | { |
| 448 | cptr = getenv ("NIS_DEFAULTS"); |
| 449 | if (cptr != NULL && strstr (cptr, "access=") != NULL) |
| 450 | result = searchaccess (cptr, result); |
| 451 | } |
| 452 | |
| 453 | return result; |
| 454 | } |
| 455 | libnsl_hidden_def (__nis_default_access) |