1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2001,2003 Networks Associates Technology, Inc. 5 * Copyright (c) 2017 Dag-Erling Smørgrav 6 * Copyright (c) 2018 Thomas Munro 7 * All rights reserved. 8 * 9 * This software was developed for the FreeBSD Project by ThinkSec AS and 10 * NAI Labs, the Security Research Division of Network Associates, Inc. 11 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the 12 * DARPA CHATS research program. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. The name of the author may not be used to endorse or promote 23 * products derived from this software without specific prior written 24 * permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/types.h> 43 #include <sys/poll.h> 44 #include <sys/procdesc.h> 45 #include <sys/wait.h> 46 47 #include <errno.h> 48 #include <fcntl.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <unistd.h> 53 54 #include <security/pam_appl.h> 55 #include <security/pam_modules.h> 56 #include <security/openpam.h> 57 58 #define PAM_ITEM_ENV(n) { (n), #n } 59 static struct { 60 int item; 61 const char *name; 62 } pam_item_env[] = { 63 PAM_ITEM_ENV(PAM_SERVICE), 64 PAM_ITEM_ENV(PAM_USER), 65 PAM_ITEM_ENV(PAM_TTY), 66 PAM_ITEM_ENV(PAM_RHOST), 67 PAM_ITEM_ENV(PAM_RUSER), 68 }; 69 #define NUM_PAM_ITEM_ENV (sizeof(pam_item_env) / sizeof(pam_item_env[0])) 70 71 #define PAM_ERR_ENV_X(str, num) str "=" #num 72 #define PAM_ERR_ENV(pam_err) PAM_ERR_ENV_X(#pam_err, pam_err) 73 static const char *pam_err_env[] = { 74 PAM_ERR_ENV(PAM_SUCCESS), 75 PAM_ERR_ENV(PAM_OPEN_ERR), 76 PAM_ERR_ENV(PAM_SYMBOL_ERR), 77 PAM_ERR_ENV(PAM_SERVICE_ERR), 78 PAM_ERR_ENV(PAM_SYSTEM_ERR), 79 PAM_ERR_ENV(PAM_BUF_ERR), 80 PAM_ERR_ENV(PAM_CONV_ERR), 81 PAM_ERR_ENV(PAM_PERM_DENIED), 82 PAM_ERR_ENV(PAM_MAXTRIES), 83 PAM_ERR_ENV(PAM_AUTH_ERR), 84 PAM_ERR_ENV(PAM_NEW_AUTHTOK_REQD), 85 PAM_ERR_ENV(PAM_CRED_INSUFFICIENT), 86 PAM_ERR_ENV(PAM_AUTHINFO_UNAVAIL), 87 PAM_ERR_ENV(PAM_USER_UNKNOWN), 88 PAM_ERR_ENV(PAM_CRED_UNAVAIL), 89 PAM_ERR_ENV(PAM_CRED_EXPIRED), 90 PAM_ERR_ENV(PAM_CRED_ERR), 91 PAM_ERR_ENV(PAM_ACCT_EXPIRED), 92 PAM_ERR_ENV(PAM_AUTHTOK_EXPIRED), 93 PAM_ERR_ENV(PAM_SESSION_ERR), 94 PAM_ERR_ENV(PAM_AUTHTOK_ERR), 95 PAM_ERR_ENV(PAM_AUTHTOK_RECOVERY_ERR), 96 PAM_ERR_ENV(PAM_AUTHTOK_LOCK_BUSY), 97 PAM_ERR_ENV(PAM_AUTHTOK_DISABLE_AGING), 98 PAM_ERR_ENV(PAM_NO_MODULE_DATA), 99 PAM_ERR_ENV(PAM_IGNORE), 100 PAM_ERR_ENV(PAM_ABORT), 101 PAM_ERR_ENV(PAM_TRY_AGAIN), 102 PAM_ERR_ENV(PAM_MODULE_UNKNOWN), 103 PAM_ERR_ENV(PAM_DOMAIN_UNKNOWN), 104 PAM_ERR_ENV(PAM_NUM_ERR), 105 }; 106 #define NUM_PAM_ERR_ENV (sizeof(pam_err_env) / sizeof(pam_err_env[0])) 107 108 struct pe_opts { 109 int return_prog_exit_status; 110 int capture_stdout; 111 int capture_stderr; 112 int expose_authtok; 113 }; 114 115 static int 116 parse_options(const char *func, int *argc, const char **argv[], 117 struct pe_opts *options) 118 { 119 int i; 120 121 /* 122 * Parse options: 123 * return_prog_exit_status: 124 * use the program exit status as the return code of pam_exec 125 * --: 126 * stop options parsing; what follows is the command to execute 127 */ 128 memset(options, 0, sizeof(*options)); 129 130 for (i = 0; i < *argc; ++i) { 131 if (strcmp((*argv)[i], "debug") == 0 || 132 strcmp((*argv)[i], "no_warn") == 0) { 133 /* ignore */ 134 } else if (strcmp((*argv)[i], "capture_stdout") == 0) { 135 options->capture_stdout = 1; 136 } else if (strcmp((*argv)[i], "capture_stderr") == 0) { 137 options->capture_stderr = 1; 138 } else if (strcmp((*argv)[i], "return_prog_exit_status") == 0) { 139 options->return_prog_exit_status = 1; 140 } else if (strcmp((*argv)[i], "expose_authtok") == 0) { 141 options->expose_authtok = 1; 142 } else { 143 if (strcmp((*argv)[i], "--") == 0) { 144 (*argc)--; 145 (*argv)++; 146 } 147 break; 148 } 149 openpam_log(PAM_LOG_DEBUG, "%s: option \"%s\" enabled", 150 func, (*argv)[i]); 151 } 152 153 (*argc) -= i; 154 (*argv) += i; 155 156 return (0); 157 } 158 159 static int 160 _pam_exec(pam_handle_t *pamh, 161 const char *func, int flags __unused, int argc, const char *argv[], 162 struct pe_opts *options) 163 { 164 char buf[PAM_MAX_MSG_SIZE]; 165 struct pollfd pfd[4]; 166 const void *item; 167 char **envlist, *envstr, *resp, **tmp; 168 ssize_t rlen, wlen; 169 int envlen, extralen, i; 170 int pam_err, serrno, status; 171 int chin[2], chout[2], cherr[2], pd; 172 nfds_t nfds, nreadfds; 173 pid_t pid; 174 const char *authtok; 175 size_t authtok_size; 176 int rc; 177 178 pd = -1; 179 pid = 0; 180 chin[0] = chin[1] = chout[0] = chout[1] = cherr[0] = cherr[1] = -1; 181 envlist = NULL; 182 183 #define OUT(ret) do { pam_err = (ret); goto out; } while (0) 184 185 /* Check there's a program name left after parsing options. */ 186 if (argc < 1) { 187 openpam_log(PAM_LOG_ERROR, "%s: No program specified: aborting", 188 func); 189 OUT(PAM_SERVICE_ERR); 190 } 191 192 /* 193 * Set up the child's environment list. It consists of the PAM 194 * environment, a few hand-picked PAM items, the name of the 195 * service function, and if return_prog_exit_status is set, the 196 * numerical values of all PAM error codes. 197 */ 198 199 /* compute the final size of the environment. */ 200 envlist = pam_getenvlist(pamh); 201 for (envlen = 0; envlist[envlen] != NULL; ++envlen) 202 /* nothing */ ; 203 extralen = NUM_PAM_ITEM_ENV + 1; 204 if (options->return_prog_exit_status) 205 extralen += NUM_PAM_ERR_ENV; 206 tmp = reallocarray(envlist, envlen + extralen + 1, sizeof(*envlist)); 207 openpam_log(PAM_LOG_DEBUG, "envlen = %d extralen = %d tmp = %p", 208 envlen, extralen, tmp); 209 if (tmp == NULL) 210 OUT(PAM_BUF_ERR); 211 envlist = tmp; 212 extralen += envlen; 213 214 /* copy selected PAM items to the environment */ 215 for (i = 0; i < NUM_PAM_ITEM_ENV; ++i) { 216 pam_err = pam_get_item(pamh, pam_item_env[i].item, &item); 217 if (pam_err != PAM_SUCCESS || item == NULL) 218 continue; 219 if (asprintf(&envstr, "%s=%s", pam_item_env[i].name, item) < 0) 220 OUT(PAM_BUF_ERR); 221 envlist[envlen++] = envstr; 222 envlist[envlen] = NULL; 223 openpam_log(PAM_LOG_DEBUG, "setenv %s", envstr); 224 } 225 226 /* add the name of the service function to the environment */ 227 if (asprintf(&envstr, "PAM_SM_FUNC=%s", func) < 0) 228 OUT(PAM_BUF_ERR); 229 envlist[envlen++] = envstr; 230 envlist[envlen] = NULL; 231 232 /* add the PAM error codes to the environment. */ 233 if (options->return_prog_exit_status) { 234 for (i = 0; i < (int)NUM_PAM_ERR_ENV; ++i) { 235 if ((envstr = strdup(pam_err_env[i])) == NULL) 236 OUT(PAM_BUF_ERR); 237 envlist[envlen++] = envstr; 238 envlist[envlen] = NULL; 239 } 240 } 241 242 openpam_log(PAM_LOG_DEBUG, "envlen = %d extralen = %d envlist = %p", 243 envlen, extralen, envlist); 244 245 /* set up pipe and get authtok if requested */ 246 if (options->expose_authtok) { 247 if (pipe(chin) != 0) { 248 openpam_log(PAM_LOG_ERROR, "%s: pipe(): %m", func); 249 OUT(PAM_SYSTEM_ERR); 250 } 251 if (fcntl(chin[1], F_SETFL, O_NONBLOCK)) { 252 openpam_log(PAM_LOG_ERROR, "%s: fcntl(): %m", func); 253 OUT(PAM_SYSTEM_ERR); 254 } 255 rc = pam_get_authtok(pamh, PAM_AUTHTOK, &authtok, NULL); 256 if (rc == PAM_SUCCESS) { 257 authtok_size = strlen(authtok); 258 } else { 259 openpam_log(PAM_LOG_ERROR, "%s: pam_get_authtok(): %s", func, 260 pam_strerror(pamh, rc)); 261 OUT(PAM_SYSTEM_ERR); 262 } 263 } 264 /* set up pipes if capture was requested */ 265 if (options->capture_stdout) { 266 if (pipe(chout) != 0) { 267 openpam_log(PAM_LOG_ERROR, "%s: pipe(): %m", func); 268 OUT(PAM_SYSTEM_ERR); 269 } 270 if (fcntl(chout[0], F_SETFL, O_NONBLOCK) != 0) { 271 openpam_log(PAM_LOG_ERROR, "%s: fcntl(): %m", func); 272 OUT(PAM_SYSTEM_ERR); 273 } 274 } else { 275 if ((chout[1] = open("/dev/null", O_RDWR)) < 0) { 276 openpam_log(PAM_LOG_ERROR, "%s: /dev/null: %m", func); 277 OUT(PAM_SYSTEM_ERR); 278 } 279 } 280 if (options->capture_stderr) { 281 if (pipe(cherr) != 0) { 282 openpam_log(PAM_LOG_ERROR, "%s: pipe(): %m", func); 283 OUT(PAM_SYSTEM_ERR); 284 } 285 if (fcntl(cherr[0], F_SETFL, O_NONBLOCK) != 0) { 286 openpam_log(PAM_LOG_ERROR, "%s: fcntl(): %m", func); 287 OUT(PAM_SYSTEM_ERR); 288 } 289 } else { 290 if ((cherr[1] = open("/dev/null", O_RDWR)) < 0) { 291 openpam_log(PAM_LOG_ERROR, "%s: /dev/null: %m", func); 292 OUT(PAM_SYSTEM_ERR); 293 } 294 } 295 296 if ((pid = pdfork(&pd, 0)) == 0) { 297 /* child */ 298 if ((chin[1] >= 0 && close(chin[1]) != 0) || 299 (chout[0] >= 0 && close(chout[0]) != 0) || 300 (cherr[0] >= 0 && close(cherr[0]) != 0)) { 301 openpam_log(PAM_LOG_ERROR, "%s: close(): %m", func); 302 } else if (chin[0] >= 0 && 303 dup2(chin[0], STDIN_FILENO) != STDIN_FILENO) { 304 openpam_log(PAM_LOG_ERROR, "%s: dup2(): %m", func); 305 } else if (dup2(chout[1], STDOUT_FILENO) != STDOUT_FILENO || 306 dup2(cherr[1], STDERR_FILENO) != STDERR_FILENO) { 307 openpam_log(PAM_LOG_ERROR, "%s: dup2(): %m", func); 308 } else { 309 execve(argv[0], (char * const *)argv, 310 (char * const *)envlist); 311 openpam_log(PAM_LOG_ERROR, "%s: execve(%s): %m", 312 func, argv[0]); 313 } 314 _exit(1); 315 } 316 /* parent */ 317 if (pid == -1) { 318 openpam_log(PAM_LOG_ERROR, "%s: pdfork(): %m", func); 319 OUT(PAM_SYSTEM_ERR); 320 } 321 /* use poll() to watch the process and stdin / stdout / stderr */ 322 if (chin[0] >= 0) 323 close(chin[0]); 324 if (chout[1] >= 0) 325 close(chout[1]); 326 if (cherr[1] >= 0) 327 close(cherr[1]); 328 memset(pfd, 0, sizeof pfd); 329 pfd[0].fd = pd; 330 pfd[0].events = POLLHUP; 331 nfds = 1; 332 nreadfds = 0; 333 if (options->capture_stdout) { 334 pfd[nfds].fd = chout[0]; 335 pfd[nfds].events = POLLIN|POLLERR|POLLHUP; 336 nfds++; 337 nreadfds++; 338 } 339 if (options->capture_stderr) { 340 pfd[nfds].fd = cherr[0]; 341 pfd[nfds].events = POLLIN|POLLERR|POLLHUP; 342 nfds++; 343 nreadfds++; 344 } 345 if (options->expose_authtok) { 346 pfd[nfds].fd = chin[1]; 347 pfd[nfds].events = POLLOUT|POLLERR|POLLHUP; 348 nfds++; 349 } 350 351 /* loop until the process exits */ 352 do { 353 if (poll(pfd, nfds, INFTIM) < 0) { 354 openpam_log(PAM_LOG_ERROR, "%s: poll(): %m", func); 355 OUT(PAM_SYSTEM_ERR); 356 } 357 /* are the stderr / stdout pipes ready for reading? */ 358 for (i = 1; i < 1 + nreadfds; ++i) { 359 if ((pfd[i].revents & POLLIN) == 0) 360 continue; 361 if ((rlen = read(pfd[i].fd, buf, sizeof(buf) - 1)) < 0) { 362 openpam_log(PAM_LOG_ERROR, "%s: read(): %m", 363 func); 364 OUT(PAM_SYSTEM_ERR); 365 } else if (rlen == 0) { 366 continue; 367 } 368 buf[rlen] = '\0'; 369 (void)pam_prompt(pamh, pfd[i].fd == chout[0] ? 370 PAM_TEXT_INFO : PAM_ERROR_MSG, &resp, "%s", buf); 371 } 372 /* is the stdin pipe ready for writing? */ 373 if (options->expose_authtok && authtok_size > 0 && 374 (pfd[nfds - 1].revents & POLLOUT) != 0) { 375 if ((wlen = write(chin[1], authtok, authtok_size)) < 0) { 376 if (errno == EAGAIN) 377 continue; 378 openpam_log(PAM_LOG_ERROR, "%s: write(): %m", 379 func); 380 OUT(PAM_SYSTEM_ERR); 381 } else { 382 authtok += wlen; 383 authtok_size -= wlen; 384 if (authtok_size == 0) { 385 /* finished writing; close and forget the pipe */ 386 close(chin[1]); 387 chin[1] = -1; 388 nfds--; 389 } 390 } 391 } 392 } while (pfd[0].revents == 0); 393 394 /* the child process has exited */ 395 while (waitpid(pid, &status, 0) == -1) { 396 if (errno == EINTR) 397 continue; 398 openpam_log(PAM_LOG_ERROR, "%s: waitpid(): %m", func); 399 OUT(PAM_SYSTEM_ERR); 400 } 401 402 /* check exit code */ 403 if (WIFSIGNALED(status)) { 404 openpam_log(PAM_LOG_ERROR, "%s: %s caught signal %d%s", 405 func, argv[0], WTERMSIG(status), 406 WCOREDUMP(status) ? " (core dumped)" : ""); 407 OUT(PAM_SERVICE_ERR); 408 } 409 if (!WIFEXITED(status)) { 410 openpam_log(PAM_LOG_ERROR, "%s: unknown status 0x%x", 411 func, status); 412 OUT(PAM_SERVICE_ERR); 413 } 414 415 if (options->return_prog_exit_status) { 416 openpam_log(PAM_LOG_DEBUG, 417 "%s: Use program exit status as return value: %d", 418 func, WEXITSTATUS(status)); 419 OUT(WEXITSTATUS(status)); 420 } else { 421 OUT(WEXITSTATUS(status) == 0 ? PAM_SUCCESS : PAM_PERM_DENIED); 422 } 423 /* unreachable */ 424 out: 425 serrno = errno; 426 if (pd >= 0) 427 close(pd); 428 if (chin[0] >= 0) 429 close(chin[0]); 430 if (chin[1] >= 0) 431 close(chin[1]); 432 if (chout[0] >= 0) 433 close(chout[0]); 434 if (chout[1] >= 0) 435 close(chout[1]); 436 if (cherr[0] >= 0) 437 close(cherr[0]); 438 if (cherr[0] >= 0) 439 close(cherr[1]); 440 if (envlist != NULL) 441 openpam_free_envlist(envlist); 442 errno = serrno; 443 return (pam_err); 444 } 445 446 PAM_EXTERN int 447 pam_sm_authenticate(pam_handle_t *pamh, int flags, 448 int argc, const char *argv[]) 449 { 450 int ret; 451 struct pe_opts options; 452 453 ret = parse_options(__func__, &argc, &argv, &options); 454 if (ret != 0) 455 return (PAM_SERVICE_ERR); 456 457 ret = _pam_exec(pamh, __func__, flags, argc, argv, &options); 458 459 /* 460 * We must check that the program returned a valid code for this 461 * function. 462 */ 463 switch (ret) { 464 case PAM_SUCCESS: 465 case PAM_ABORT: 466 case PAM_AUTHINFO_UNAVAIL: 467 case PAM_AUTH_ERR: 468 case PAM_BUF_ERR: 469 case PAM_CONV_ERR: 470 case PAM_CRED_INSUFFICIENT: 471 case PAM_IGNORE: 472 case PAM_MAXTRIES: 473 case PAM_PERM_DENIED: 474 case PAM_SERVICE_ERR: 475 case PAM_SYSTEM_ERR: 476 case PAM_USER_UNKNOWN: 477 break; 478 default: 479 openpam_log(PAM_LOG_ERROR, "%s returned invalid code %d", 480 argv[0], ret); 481 ret = PAM_SERVICE_ERR; 482 } 483 484 return (ret); 485 } 486 487 PAM_EXTERN int 488 pam_sm_setcred(pam_handle_t *pamh, int flags, 489 int argc, const char *argv[]) 490 { 491 int ret; 492 struct pe_opts options; 493 494 ret = parse_options(__func__, &argc, &argv, &options); 495 if (ret != 0) 496 return (PAM_SERVICE_ERR); 497 498 ret = _pam_exec(pamh, __func__, flags, argc, argv, &options); 499 500 /* 501 * We must check that the program returned a valid code for this 502 * function. 503 */ 504 switch (ret) { 505 case PAM_SUCCESS: 506 case PAM_ABORT: 507 case PAM_BUF_ERR: 508 case PAM_CONV_ERR: 509 case PAM_CRED_ERR: 510 case PAM_CRED_EXPIRED: 511 case PAM_CRED_UNAVAIL: 512 case PAM_IGNORE: 513 case PAM_PERM_DENIED: 514 case PAM_SERVICE_ERR: 515 case PAM_SYSTEM_ERR: 516 case PAM_USER_UNKNOWN: 517 break; 518 default: 519 openpam_log(PAM_LOG_ERROR, "%s returned invalid code %d", 520 argv[0], ret); 521 ret = PAM_SERVICE_ERR; 522 } 523 524 return (ret); 525 } 526 527 PAM_EXTERN int 528 pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, 529 int argc, const char *argv[]) 530 { 531 int ret; 532 struct pe_opts options; 533 534 ret = parse_options(__func__, &argc, &argv, &options); 535 if (ret != 0) 536 return (PAM_SERVICE_ERR); 537 538 ret = _pam_exec(pamh, __func__, flags, argc, argv, &options); 539 540 /* 541 * We must check that the program returned a valid code for this 542 * function. 543 */ 544 switch (ret) { 545 case PAM_SUCCESS: 546 case PAM_ABORT: 547 case PAM_ACCT_EXPIRED: 548 case PAM_AUTH_ERR: 549 case PAM_BUF_ERR: 550 case PAM_CONV_ERR: 551 case PAM_IGNORE: 552 case PAM_NEW_AUTHTOK_REQD: 553 case PAM_PERM_DENIED: 554 case PAM_SERVICE_ERR: 555 case PAM_SYSTEM_ERR: 556 case PAM_USER_UNKNOWN: 557 break; 558 default: 559 openpam_log(PAM_LOG_ERROR, "%s returned invalid code %d", 560 argv[0], ret); 561 ret = PAM_SERVICE_ERR; 562 } 563 564 return (ret); 565 } 566 567 PAM_EXTERN int 568 pam_sm_open_session(pam_handle_t *pamh, int flags, 569 int argc, const char *argv[]) 570 { 571 int ret; 572 struct pe_opts options; 573 574 ret = parse_options(__func__, &argc, &argv, &options); 575 if (ret != 0) 576 return (PAM_SERVICE_ERR); 577 578 ret = _pam_exec(pamh, __func__, flags, argc, argv, &options); 579 580 /* 581 * We must check that the program returned a valid code for this 582 * function. 583 */ 584 switch (ret) { 585 case PAM_SUCCESS: 586 case PAM_ABORT: 587 case PAM_BUF_ERR: 588 case PAM_CONV_ERR: 589 case PAM_IGNORE: 590 case PAM_PERM_DENIED: 591 case PAM_SERVICE_ERR: 592 case PAM_SESSION_ERR: 593 case PAM_SYSTEM_ERR: 594 break; 595 default: 596 openpam_log(PAM_LOG_ERROR, "%s returned invalid code %d", 597 argv[0], ret); 598 ret = PAM_SERVICE_ERR; 599 } 600 601 return (ret); 602 } 603 604 PAM_EXTERN int 605 pam_sm_close_session(pam_handle_t *pamh, int flags, 606 int argc, const char *argv[]) 607 { 608 int ret; 609 struct pe_opts options; 610 611 ret = parse_options(__func__, &argc, &argv, &options); 612 if (ret != 0) 613 return (PAM_SERVICE_ERR); 614 615 ret = _pam_exec(pamh, __func__, flags, argc, argv, &options); 616 617 /* 618 * We must check that the program returned a valid code for this 619 * function. 620 */ 621 switch (ret) { 622 case PAM_SUCCESS: 623 case PAM_ABORT: 624 case PAM_BUF_ERR: 625 case PAM_CONV_ERR: 626 case PAM_IGNORE: 627 case PAM_PERM_DENIED: 628 case PAM_SERVICE_ERR: 629 case PAM_SESSION_ERR: 630 case PAM_SYSTEM_ERR: 631 break; 632 default: 633 openpam_log(PAM_LOG_ERROR, "%s returned invalid code %d", 634 argv[0], ret); 635 ret = PAM_SERVICE_ERR; 636 } 637 638 return (ret); 639 } 640 641 PAM_EXTERN int 642 pam_sm_chauthtok(pam_handle_t *pamh, int flags, 643 int argc, const char *argv[]) 644 { 645 int ret; 646 struct pe_opts options; 647 648 ret = parse_options(__func__, &argc, &argv, &options); 649 if (ret != 0) 650 return (PAM_SERVICE_ERR); 651 652 ret = _pam_exec(pamh, __func__, flags, argc, argv, &options); 653 654 /* 655 * We must check that the program returned a valid code for this 656 * function. 657 */ 658 switch (ret) { 659 case PAM_SUCCESS: 660 case PAM_ABORT: 661 case PAM_AUTHTOK_DISABLE_AGING: 662 case PAM_AUTHTOK_ERR: 663 case PAM_AUTHTOK_LOCK_BUSY: 664 case PAM_AUTHTOK_RECOVERY_ERR: 665 case PAM_BUF_ERR: 666 case PAM_CONV_ERR: 667 case PAM_IGNORE: 668 case PAM_PERM_DENIED: 669 case PAM_SERVICE_ERR: 670 case PAM_SYSTEM_ERR: 671 case PAM_TRY_AGAIN: 672 break; 673 default: 674 openpam_log(PAM_LOG_ERROR, "%s returned invalid code %d", 675 argv[0], ret); 676 ret = PAM_SERVICE_ERR; 677 } 678 679 return (ret); 680 } 681 682 PAM_MODULE_ENTRY("pam_exec"); 683