1 /* $NetBSD: isakmp_xauth.c,v 1.11.6.2 2009/04/20 13:35:36 tteras Exp $ */ 2 3 /* Id: isakmp_xauth.c,v 1.38 2006/08/22 18:17:17 manubsd Exp */ 4 5 /* 6 * Copyright (C) 2004-2005 Emmanuel Dreyfus 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "config.h" 35 36 #include <sys/types.h> 37 #include <sys/param.h> 38 #include <sys/socket.h> 39 #include <sys/queue.h> 40 41 #include <netinet/in.h> 42 43 #include <stdlib.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include <errno.h> 47 #include <pwd.h> 48 #include <grp.h> 49 #if TIME_WITH_SYS_TIME 50 # include <sys/time.h> 51 # include <time.h> 52 #else 53 # if HAVE_SYS_TIME_H 54 # include <sys/time.h> 55 # else 56 # include <time.h> 57 # endif 58 #endif 59 #include <netdb.h> 60 #ifdef HAVE_UNISTD_H 61 #include <unistd.h> 62 #endif 63 #include <ctype.h> 64 #include <resolv.h> 65 66 #ifdef HAVE_SHADOW_H 67 #include <shadow.h> 68 #endif 69 70 #include "var.h" 71 #include "misc.h" 72 #include "vmbuf.h" 73 #include "plog.h" 74 #include "sockmisc.h" 75 #include "schedule.h" 76 #include "debug.h" 77 78 #include "crypto_openssl.h" 79 #include "isakmp_var.h" 80 #include "isakmp.h" 81 #include "admin.h" 82 #include "privsep.h" 83 #include "evt.h" 84 #include "handler.h" 85 #include "throttle.h" 86 #include "remoteconf.h" 87 #include "isakmp_inf.h" 88 #include "isakmp_xauth.h" 89 #include "isakmp_unity.h" 90 #include "isakmp_cfg.h" 91 #include "strnames.h" 92 #include "ipsec_doi.h" 93 #include "remoteconf.h" 94 #include "localconf.h" 95 96 #ifdef HAVE_LIBRADIUS 97 #include <radlib.h> 98 99 struct rad_handle *radius_auth_state = NULL; 100 struct rad_handle *radius_acct_state = NULL; 101 #endif 102 103 #ifdef HAVE_LIBPAM 104 #include <security/pam_appl.h> 105 106 static char *PAM_usr = NULL; 107 static char *PAM_pwd = NULL; 108 static int PAM_conv(int, const struct pam_message **, 109 struct pam_response **, void *); 110 static struct pam_conv PAM_chat = { &PAM_conv, NULL }; 111 #endif 112 113 #ifdef HAVE_LIBLDAP 114 #include "ldap.h" 115 #include <arpa/inet.h> 116 struct xauth_ldap_config xauth_ldap_config; 117 #endif 118 119 void 120 xauth_sendreq(iph1) 121 struct ph1handle *iph1; 122 { 123 vchar_t *buffer; 124 struct isakmp_pl_attr *attr; 125 struct isakmp_data *typeattr; 126 struct isakmp_data *usrattr; 127 struct isakmp_data *pwdattr; 128 struct xauth_state *xst = &iph1->mode_cfg->xauth; 129 size_t tlen; 130 131 /* Status checks */ 132 if (iph1->status != PHASE1ST_ESTABLISHED) { 133 plog(LLV_ERROR, LOCATION, NULL, 134 "Xauth request while phase 1 is not completed\n"); 135 return; 136 } 137 138 if (xst->status != XAUTHST_NOTYET) { 139 plog(LLV_ERROR, LOCATION, NULL, 140 "Xauth request whith Xauth state %d\n", xst->status); 141 return; 142 } 143 144 plog(LLV_INFO, LOCATION, NULL, "Sending Xauth request\n"); 145 146 tlen = sizeof(*attr) + 147 + sizeof(*typeattr) + 148 + sizeof(*usrattr) + 149 + sizeof(*pwdattr); 150 151 if ((buffer = vmalloc(tlen)) == NULL) { 152 plog(LLV_ERROR, LOCATION, NULL, "Cannot allocate buffer\n"); 153 return; 154 } 155 156 attr = (struct isakmp_pl_attr *)buffer->v; 157 memset(attr, 0, tlen); 158 159 attr->h.len = htons(tlen); 160 attr->type = ISAKMP_CFG_REQUEST; 161 attr->id = htons(eay_random()); 162 163 typeattr = (struct isakmp_data *)(attr + 1); 164 typeattr->type = htons(XAUTH_TYPE | ISAKMP_GEN_TV); 165 typeattr->lorv = htons(XAUTH_TYPE_GENERIC); 166 167 usrattr = (struct isakmp_data *)(typeattr + 1); 168 usrattr->type = htons(XAUTH_USER_NAME | ISAKMP_GEN_TLV); 169 usrattr->lorv = htons(0); 170 171 pwdattr = (struct isakmp_data *)(usrattr + 1); 172 pwdattr->type = htons(XAUTH_USER_PASSWORD | ISAKMP_GEN_TLV); 173 pwdattr->lorv = htons(0); 174 175 isakmp_cfg_send(iph1, buffer, 176 ISAKMP_NPTYPE_ATTR, ISAKMP_FLAG_E, 1); 177 178 vfree(buffer); 179 180 xst->status = XAUTHST_REQSENT; 181 182 return; 183 } 184 185 int 186 xauth_attr_reply(iph1, attr, id) 187 struct ph1handle *iph1; 188 struct isakmp_data *attr; 189 int id; 190 { 191 char **outlet = NULL; 192 size_t alen = 0; 193 int type; 194 struct xauth_state *xst = &iph1->mode_cfg->xauth; 195 196 if ((iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) == 0) { 197 plog(LLV_ERROR, LOCATION, NULL, 198 "Xauth reply but peer did not declare " 199 "itself as Xauth capable\n"); 200 return -1; 201 } 202 203 if (xst->status != XAUTHST_REQSENT) { 204 plog(LLV_ERROR, LOCATION, NULL, 205 "Xauth reply while Xauth state is %d\n", xst->status); 206 return -1; 207 } 208 209 type = ntohs(attr->type) & ~ISAKMP_GEN_MASK; 210 switch (type) { 211 case XAUTH_TYPE: 212 switch (ntohs(attr->lorv)) { 213 case XAUTH_TYPE_GENERIC: 214 xst->authtype = XAUTH_TYPE_GENERIC; 215 break; 216 default: 217 plog(LLV_WARNING, LOCATION, NULL, 218 "Unexpected authentication type %d\n", 219 ntohs(type)); 220 return -1; 221 } 222 break; 223 224 case XAUTH_USER_NAME: 225 outlet = &xst->authdata.generic.usr; 226 break; 227 228 case XAUTH_USER_PASSWORD: 229 outlet = &xst->authdata.generic.pwd; 230 break; 231 232 default: 233 plog(LLV_WARNING, LOCATION, NULL, 234 "ignored Xauth attribute %d\n", type); 235 break; 236 } 237 238 if (outlet != NULL) { 239 alen = ntohs(attr->lorv); 240 241 if ((*outlet = racoon_malloc(alen + 1)) == NULL) { 242 plog(LLV_ERROR, LOCATION, NULL, 243 "Cannot allocate memory for Xauth Data\n"); 244 return -1; 245 } 246 247 memcpy(*outlet, attr + 1, alen); 248 (*outlet)[alen] = '\0'; 249 outlet = NULL; 250 } 251 252 253 if ((xst->authdata.generic.usr != NULL) && 254 (xst->authdata.generic.pwd != NULL)) { 255 int port; 256 int res; 257 char *usr = xst->authdata.generic.usr; 258 char *pwd = xst->authdata.generic.pwd; 259 time_t throttle_delay = 0; 260 261 #if 0 /* Real debug, don't do that at home */ 262 plog(LLV_DEBUG, LOCATION, NULL, 263 "Got username \"%s\", password \"%s\"\n", usr, pwd); 264 #endif 265 strncpy(iph1->mode_cfg->login, usr, LOGINLEN); 266 iph1->mode_cfg->login[LOGINLEN] = '\0'; 267 268 res = -1; 269 if ((port = isakmp_cfg_getport(iph1)) == -1) { 270 plog(LLV_ERROR, LOCATION, NULL, 271 "Port pool depleted\n"); 272 goto skip_auth; 273 } 274 275 switch (isakmp_cfg_config.authsource) { 276 case ISAKMP_CFG_AUTH_SYSTEM: 277 res = privsep_xauth_login_system(usr, pwd); 278 break; 279 #ifdef HAVE_LIBRADIUS 280 case ISAKMP_CFG_AUTH_RADIUS: 281 res = xauth_login_radius(iph1, usr, pwd); 282 break; 283 #endif 284 #ifdef HAVE_LIBPAM 285 case ISAKMP_CFG_AUTH_PAM: 286 res = privsep_xauth_login_pam(iph1->mode_cfg->port, 287 iph1->remote, usr, pwd); 288 break; 289 #endif 290 #ifdef HAVE_LIBLDAP 291 case ISAKMP_CFG_AUTH_LDAP: 292 res = xauth_login_ldap(iph1, usr, pwd); 293 break; 294 #endif 295 default: 296 plog(LLV_ERROR, LOCATION, NULL, 297 "Unexpected authentication source\n"); 298 res = -1; 299 break; 300 } 301 302 /* 303 * Optional group authentication 304 */ 305 if (!res && (isakmp_cfg_config.groupcount)) 306 res = group_check(iph1, 307 isakmp_cfg_config.grouplist, 308 isakmp_cfg_config.groupcount); 309 310 /* 311 * On failure, throttle the connexion for the remote host 312 * in order to make password attacks more difficult. 313 */ 314 throttle_delay = throttle_host(iph1->remote, res) - time(NULL); 315 if (throttle_delay > 0) { 316 char *str; 317 318 str = saddrwop2str(iph1->remote); 319 320 plog(LLV_ERROR, LOCATION, NULL, 321 "Throttling in action for %s: delay %lds\n", 322 str, (unsigned long)throttle_delay); 323 res = -1; 324 } else { 325 throttle_delay = 0; 326 } 327 328 skip_auth: 329 if (throttle_delay != 0) { 330 struct xauth_reply_arg *xra; 331 332 if ((xra = racoon_malloc(sizeof(*xra))) == NULL) { 333 plog(LLV_ERROR, LOCATION, NULL, 334 "malloc failed, bypass throttling\n"); 335 return xauth_reply(iph1, port, id, res); 336 } 337 338 /* 339 * We need to store the ph1, but it might have 340 * disapeared when xauth_reply is called, so 341 * store the index instead. 342 */ 343 xra->index = iph1->index; 344 xra->port = port; 345 xra->id = id; 346 xra->res = res; 347 sched_new(throttle_delay, xauth_reply_stub, xra); 348 } else { 349 return xauth_reply(iph1, port, id, res); 350 } 351 } 352 353 return 0; 354 } 355 356 void 357 xauth_reply_stub(args) 358 void *args; 359 { 360 struct xauth_reply_arg *xra = (struct xauth_reply_arg *)args; 361 struct ph1handle *iph1; 362 363 if ((iph1 = getph1byindex(&xra->index)) != NULL) 364 (void)xauth_reply(iph1, xra->port, xra->id, xra->res); 365 else 366 plog(LLV_ERROR, LOCATION, NULL, 367 "Delayed Xauth reply: phase 1 no longer exists.\n"); 368 369 racoon_free(xra); 370 return; 371 } 372 373 int 374 xauth_reply(iph1, port, id, res) 375 struct ph1handle *iph1; 376 int port; 377 int id; 378 { 379 struct xauth_state *xst = &iph1->mode_cfg->xauth; 380 char *usr = xst->authdata.generic.usr; 381 382 if (res != 0) { 383 if (port != -1) 384 isakmp_cfg_putport(iph1, port); 385 386 plog(LLV_INFO, LOCATION, NULL, 387 "login failed for user \"%s\"\n", usr); 388 389 xauth_sendstatus(iph1, XAUTH_STATUS_FAIL, id); 390 xst->status = XAUTHST_NOTYET; 391 392 /* Delete Phase 1 SA */ 393 if (iph1->status == PHASE1ST_ESTABLISHED) 394 isakmp_info_send_d1(iph1); 395 remph1(iph1); 396 delph1(iph1); 397 398 return -1; 399 } 400 401 xst->status = XAUTHST_OK; 402 plog(LLV_INFO, LOCATION, NULL, 403 "login succeeded for user \"%s\"\n", usr); 404 405 xauth_sendstatus(iph1, XAUTH_STATUS_OK, id); 406 407 return 0; 408 } 409 410 void 411 xauth_sendstatus(iph1, status, id) 412 struct ph1handle *iph1; 413 int status; 414 int id; 415 { 416 vchar_t *buffer; 417 struct isakmp_pl_attr *attr; 418 struct isakmp_data *stattr; 419 size_t tlen; 420 421 tlen = sizeof(*attr) + 422 + sizeof(*stattr); 423 424 if ((buffer = vmalloc(tlen)) == NULL) { 425 plog(LLV_ERROR, LOCATION, NULL, "Cannot allocate buffer\n"); 426 return; 427 } 428 429 attr = (struct isakmp_pl_attr *)buffer->v; 430 memset(attr, 0, tlen); 431 432 attr->h.len = htons(tlen); 433 attr->type = ISAKMP_CFG_SET; 434 attr->id = htons(id); 435 436 stattr = (struct isakmp_data *)(attr + 1); 437 stattr->type = htons(XAUTH_STATUS | ISAKMP_GEN_TV); 438 stattr->lorv = htons(status); 439 440 isakmp_cfg_send(iph1, buffer, 441 ISAKMP_NPTYPE_ATTR, ISAKMP_FLAG_E, 1); 442 443 vfree(buffer); 444 445 return; 446 } 447 448 #ifdef HAVE_LIBRADIUS 449 int 450 xauth_radius_init(void) 451 { 452 /* For first time use, initialize Radius */ 453 if ((isakmp_cfg_config.authsource == ISAKMP_CFG_AUTH_RADIUS) && 454 (radius_auth_state == NULL)) { 455 if ((radius_auth_state = rad_auth_open()) == NULL) { 456 plog(LLV_ERROR, LOCATION, NULL, 457 "Cannot init libradius\n"); 458 return -1; 459 } 460 461 if (rad_config(radius_auth_state, NULL) != 0) { 462 plog(LLV_ERROR, LOCATION, NULL, 463 "Cannot open librarius config file: %s\n", 464 rad_strerror(radius_auth_state)); 465 rad_close(radius_auth_state); 466 radius_auth_state = NULL; 467 return -1; 468 } 469 } 470 471 if ((isakmp_cfg_config.accounting == ISAKMP_CFG_ACCT_RADIUS) && 472 (radius_acct_state == NULL)) { 473 if ((radius_acct_state = rad_acct_open()) == NULL) { 474 plog(LLV_ERROR, LOCATION, NULL, 475 "Cannot init libradius\n"); 476 return -1; 477 } 478 479 if (rad_config(radius_acct_state, NULL) != 0) { 480 plog(LLV_ERROR, LOCATION, NULL, 481 "Cannot open librarius config file: %s\n", 482 rad_strerror(radius_acct_state)); 483 rad_close(radius_acct_state); 484 radius_acct_state = NULL; 485 return -1; 486 } 487 } 488 489 return 0; 490 } 491 492 int 493 xauth_login_radius(iph1, usr, pwd) 494 struct ph1handle *iph1; 495 char *usr; 496 char *pwd; 497 { 498 int res; 499 const void *data; 500 size_t len; 501 int type; 502 503 if (rad_create_request(radius_auth_state, RAD_ACCESS_REQUEST) != 0) { 504 plog(LLV_ERROR, LOCATION, NULL, 505 "rad_create_request failed: %s\n", 506 rad_strerror(radius_auth_state)); 507 return -1; 508 } 509 510 if (rad_put_string(radius_auth_state, RAD_USER_NAME, usr) != 0) { 511 plog(LLV_ERROR, LOCATION, NULL, 512 "rad_put_string failed: %s\n", 513 rad_strerror(radius_auth_state)); 514 return -1; 515 } 516 517 if (rad_put_string(radius_auth_state, RAD_USER_PASSWORD, pwd) != 0) { 518 plog(LLV_ERROR, LOCATION, NULL, 519 "rad_put_string failed: %s\n", 520 rad_strerror(radius_auth_state)); 521 return -1; 522 } 523 524 if (isakmp_cfg_radius_common(radius_auth_state, iph1->mode_cfg->port) != 0) 525 return -1; 526 527 switch (res = rad_send_request(radius_auth_state)) { 528 case RAD_ACCESS_ACCEPT: 529 while ((type = rad_get_attr(radius_auth_state, &data, &len)) != 0) { 530 switch (type) { 531 case RAD_FRAMED_IP_ADDRESS: 532 iph1->mode_cfg->addr4 = rad_cvt_addr(data); 533 iph1->mode_cfg->flags 534 |= ISAKMP_CFG_ADDR4_EXTERN; 535 break; 536 537 case RAD_FRAMED_IP_NETMASK: 538 iph1->mode_cfg->mask4 = rad_cvt_addr(data); 539 iph1->mode_cfg->flags 540 |= ISAKMP_CFG_MASK4_EXTERN; 541 break; 542 543 default: 544 plog(LLV_INFO, LOCATION, NULL, 545 "Unexpected attribute: %d\n", type); 546 break; 547 } 548 } 549 550 return 0; 551 break; 552 553 case RAD_ACCESS_REJECT: 554 return -1; 555 break; 556 557 case -1: 558 plog(LLV_ERROR, LOCATION, NULL, 559 "rad_send_request failed: %s\n", 560 rad_strerror(radius_auth_state)); 561 return -1; 562 break; 563 default: 564 plog(LLV_ERROR, LOCATION, NULL, 565 "rad_send_request returned %d\n", res); 566 return -1; 567 break; 568 } 569 570 return -1; 571 } 572 #endif 573 574 #ifdef HAVE_LIBPAM 575 static int 576 PAM_conv(msg_count, msg, rsp, dontcare) 577 int msg_count; 578 const struct pam_message **msg; 579 struct pam_response **rsp; 580 void *dontcare; 581 { 582 int i; 583 int replies = 0; 584 struct pam_response *reply = NULL; 585 586 if ((reply = racoon_malloc(sizeof(*reply) * msg_count)) == NULL) 587 return PAM_CONV_ERR; 588 bzero(reply, sizeof(*reply) * msg_count); 589 590 for (i = 0; i < msg_count; i++) { 591 switch (msg[i]->msg_style) { 592 case PAM_PROMPT_ECHO_ON: 593 /* Send the username, libpam frees resp */ 594 reply[i].resp_retcode = PAM_SUCCESS; 595 if ((reply[i].resp = strdup(PAM_usr)) == NULL) { 596 plog(LLV_ERROR, LOCATION, 597 NULL, "strdup failed\n"); 598 exit(1); 599 } 600 break; 601 602 case PAM_PROMPT_ECHO_OFF: 603 /* Send the password, libpam frees resp */ 604 reply[i].resp_retcode = PAM_SUCCESS; 605 if ((reply[i].resp = strdup(PAM_pwd)) == NULL) { 606 plog(LLV_ERROR, LOCATION, 607 NULL, "strdup failed\n"); 608 exit(1); 609 } 610 break; 611 612 case PAM_TEXT_INFO: 613 case PAM_ERROR_MSG: 614 reply[i].resp_retcode = PAM_SUCCESS; 615 reply[i].resp = NULL; 616 break; 617 618 default: 619 if (reply != NULL) 620 racoon_free(reply); 621 return PAM_CONV_ERR; 622 break; 623 } 624 } 625 626 if (reply != NULL) 627 *rsp = reply; 628 629 return PAM_SUCCESS; 630 } 631 632 int 633 xauth_login_pam(port, raddr, usr, pwd) 634 int port; 635 struct sockaddr *raddr; 636 char *usr; 637 char *pwd; 638 { 639 int error; 640 int res; 641 const void *data; 642 size_t len; 643 int type; 644 char *remote = NULL; 645 pam_handle_t *pam = NULL; 646 647 if (isakmp_cfg_config.port_pool == NULL) { 648 plog(LLV_ERROR, LOCATION, NULL, 649 "isakmp_cfg_config.port_pool == NULL\n"); 650 return -1; 651 } 652 653 if ((error = pam_start("racoon", usr, 654 &PAM_chat, &isakmp_cfg_config.port_pool[port].pam)) != 0) { 655 if (isakmp_cfg_config.port_pool[port].pam == NULL) { 656 plog(LLV_ERROR, LOCATION, NULL, "pam_start failed\n"); 657 return -1; 658 } else { 659 plog(LLV_ERROR, LOCATION, NULL, 660 "pam_start failed: %s\n", 661 pam_strerror(isakmp_cfg_config.port_pool[port].pam, 662 error)); 663 goto out; 664 } 665 } 666 pam = isakmp_cfg_config.port_pool[port].pam; 667 668 if ((remote = strdup(saddrwop2str(raddr))) == NULL) { 669 plog(LLV_ERROR, LOCATION, NULL, 670 "cannot allocate memory: %s\n", strerror(errno)); 671 goto out; 672 } 673 674 if ((error = pam_set_item(pam, PAM_RHOST, remote)) != 0) { 675 plog(LLV_ERROR, LOCATION, NULL, 676 "pam_set_item failed: %s\n", 677 pam_strerror(pam, error)); 678 goto out; 679 } 680 681 PAM_usr = usr; 682 PAM_pwd = pwd; 683 error = pam_authenticate(pam, 0); 684 PAM_usr = NULL; 685 PAM_pwd = NULL; 686 if (error != 0) { 687 plog(LLV_ERROR, LOCATION, NULL, 688 "pam_authenticate failed: %s\n", 689 pam_strerror(pam, error)); 690 goto out; 691 } 692 693 if ((error = pam_acct_mgmt(pam, 0)) != 0) { 694 plog(LLV_ERROR, LOCATION, NULL, 695 "pam_acct_mgmt failed: %s\n", 696 pam_strerror(pam, error)); 697 goto out; 698 } 699 700 if ((error = pam_setcred(pam, 0)) != 0) { 701 plog(LLV_ERROR, LOCATION, NULL, 702 "pam_setcred failed: %s\n", 703 pam_strerror(pam, error)); 704 goto out; 705 } 706 707 if (remote != NULL) 708 free(remote); 709 710 return 0; 711 712 out: 713 pam_end(pam, error); 714 isakmp_cfg_config.port_pool[port].pam = NULL; 715 if (remote != NULL) 716 free(remote); 717 return -1; 718 } 719 #endif 720 721 #ifdef HAVE_LIBLDAP 722 int 723 xauth_ldap_init(void) 724 { 725 int tmplen; 726 int error = -1; 727 728 xauth_ldap_config.pver = 3; 729 xauth_ldap_config.host = NULL; 730 xauth_ldap_config.port = LDAP_PORT; 731 xauth_ldap_config.base = NULL; 732 xauth_ldap_config.subtree = 0; 733 xauth_ldap_config.bind_dn = NULL; 734 xauth_ldap_config.bind_pw = NULL; 735 xauth_ldap_config.auth_type = LDAP_AUTH_SIMPLE; 736 xauth_ldap_config.attr_user = NULL; 737 xauth_ldap_config.attr_addr = NULL; 738 xauth_ldap_config.attr_mask = NULL; 739 xauth_ldap_config.attr_group = NULL; 740 xauth_ldap_config.attr_member = NULL; 741 742 /* set default host */ 743 tmplen = strlen(LDAP_DFLT_HOST); 744 xauth_ldap_config.host = vmalloc(tmplen); 745 if (xauth_ldap_config.host == NULL) 746 goto out; 747 memcpy(xauth_ldap_config.host->v, LDAP_DFLT_HOST, tmplen); 748 749 /* set default user naming attribute */ 750 tmplen = strlen(LDAP_DFLT_USER); 751 xauth_ldap_config.attr_user = vmalloc(tmplen); 752 if (xauth_ldap_config.attr_user == NULL) 753 goto out; 754 memcpy(xauth_ldap_config.attr_user->v, LDAP_DFLT_USER, tmplen); 755 756 /* set default address attribute */ 757 tmplen = strlen(LDAP_DFLT_ADDR); 758 xauth_ldap_config.attr_addr = vmalloc(tmplen); 759 if (xauth_ldap_config.attr_addr == NULL) 760 goto out; 761 memcpy(xauth_ldap_config.attr_addr->v, LDAP_DFLT_ADDR, tmplen); 762 763 /* set default netmask attribute */ 764 tmplen = strlen(LDAP_DFLT_MASK); 765 xauth_ldap_config.attr_mask = vmalloc(tmplen); 766 if (xauth_ldap_config.attr_mask == NULL) 767 goto out; 768 memcpy(xauth_ldap_config.attr_mask->v, LDAP_DFLT_MASK, tmplen); 769 770 /* set default group naming attribute */ 771 tmplen = strlen(LDAP_DFLT_GROUP); 772 xauth_ldap_config.attr_group = vmalloc(tmplen); 773 if (xauth_ldap_config.attr_group == NULL) 774 goto out; 775 memcpy(xauth_ldap_config.attr_group->v, LDAP_DFLT_GROUP, tmplen); 776 777 /* set default member attribute */ 778 tmplen = strlen(LDAP_DFLT_MEMBER); 779 xauth_ldap_config.attr_member = vmalloc(tmplen); 780 if (xauth_ldap_config.attr_member == NULL) 781 goto out; 782 memcpy(xauth_ldap_config.attr_member->v, LDAP_DFLT_MEMBER, tmplen); 783 784 error = 0; 785 out: 786 if (error != 0) 787 plog(LLV_ERROR, LOCATION, NULL, "cannot allocate memory\n"); 788 789 return error; 790 } 791 792 int 793 xauth_login_ldap(iph1, usr, pwd) 794 struct ph1handle *iph1; 795 char *usr; 796 char *pwd; 797 { 798 int rtn = -1; 799 int res = -1; 800 LDAP *ld = NULL; 801 LDAPMessage *lr = NULL; 802 LDAPMessage *le = NULL; 803 struct berval cred; 804 struct berval **bv = NULL; 805 struct timeval timeout; 806 char *init = NULL; 807 char *filter = NULL; 808 char *atlist[3]; 809 char *basedn = NULL; 810 char *userdn = NULL; 811 int tmplen = 0; 812 int ecount = 0; 813 int scope = LDAP_SCOPE_ONE; 814 815 atlist[0] = NULL; 816 atlist[1] = NULL; 817 atlist[2] = NULL; 818 819 /* build our initialization url */ 820 tmplen = strlen("ldap://:") + 17; 821 tmplen += strlen(xauth_ldap_config.host->v); 822 init = racoon_malloc(tmplen); 823 if (init == NULL) { 824 plog(LLV_ERROR, LOCATION, NULL, 825 "unable to alloc ldap init url\n"); 826 goto ldap_end; 827 } 828 sprintf(init,"ldap://%s:%d", 829 xauth_ldap_config.host->v, 830 xauth_ldap_config.port ); 831 832 /* initialize the ldap handle */ 833 res = ldap_initialize(&ld, init); 834 if (res != LDAP_SUCCESS) { 835 plog(LLV_ERROR, LOCATION, NULL, 836 "ldap_initialize failed: %s\n", 837 ldap_err2string(res)); 838 goto ldap_end; 839 } 840 841 /* initialize the protocol version */ 842 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, 843 &xauth_ldap_config.pver); 844 845 /* 846 * attempt to bind to the ldap server. 847 * default to anonymous bind unless a 848 * user dn and password has been 849 * specified in our configuration 850 */ 851 if ((xauth_ldap_config.bind_dn != NULL)&& 852 (xauth_ldap_config.bind_pw != NULL)) 853 { 854 cred.bv_val = xauth_ldap_config.bind_pw->v; 855 cred.bv_len = strlen( cred.bv_val ); 856 res = ldap_sasl_bind_s(ld, 857 xauth_ldap_config.bind_dn->v, NULL, &cred, 858 NULL, NULL, NULL); 859 } 860 else 861 { 862 res = ldap_sasl_bind_s(ld, 863 NULL, NULL, NULL, 864 NULL, NULL, NULL); 865 } 866 867 if (res!=LDAP_SUCCESS) { 868 plog(LLV_ERROR, LOCATION, NULL, 869 "ldap_sasl_bind_s (search) failed: %s\n", 870 ldap_err2string(res)); 871 goto ldap_end; 872 } 873 874 /* build an ldap user search filter */ 875 tmplen = strlen(xauth_ldap_config.attr_user->v); 876 tmplen += 1; 877 tmplen += strlen(usr); 878 tmplen += 1; 879 filter = racoon_malloc(tmplen); 880 if (filter == NULL) { 881 plog(LLV_ERROR, LOCATION, NULL, 882 "unable to alloc ldap search filter buffer\n"); 883 goto ldap_end; 884 } 885 sprintf(filter, "%s=%s", 886 xauth_ldap_config.attr_user->v, usr); 887 888 /* build our return attribute list */ 889 tmplen = strlen(xauth_ldap_config.attr_addr->v) + 1; 890 atlist[0] = racoon_malloc(tmplen); 891 tmplen = strlen(xauth_ldap_config.attr_mask->v) + 1; 892 atlist[1] = racoon_malloc(tmplen); 893 if ((atlist[0] == NULL)||(atlist[1] == NULL)) { 894 plog(LLV_ERROR, LOCATION, NULL, 895 "unable to alloc ldap attrib list buffer\n"); 896 goto ldap_end; 897 } 898 strcpy(atlist[0],xauth_ldap_config.attr_addr->v); 899 strcpy(atlist[1],xauth_ldap_config.attr_mask->v); 900 901 /* attempt to locate the user dn */ 902 if (xauth_ldap_config.base != NULL) 903 basedn = xauth_ldap_config.base->v; 904 if (xauth_ldap_config.subtree) 905 scope = LDAP_SCOPE_SUBTREE; 906 timeout.tv_sec = 15; 907 timeout.tv_usec = 0; 908 res = ldap_search_ext_s(ld, basedn, scope, 909 filter, atlist, 0, NULL, NULL, 910 &timeout, 2, &lr); 911 if (res != LDAP_SUCCESS) { 912 plog(LLV_ERROR, LOCATION, NULL, 913 "ldap_search_ext_s failed: %s\n", 914 ldap_err2string(res)); 915 goto ldap_end; 916 } 917 918 /* check the number of ldap entries returned */ 919 ecount = ldap_count_entries(ld, lr); 920 if (ecount < 1) { 921 plog(LLV_WARNING, LOCATION, NULL, 922 "no ldap results for filter \'%s\'\n", 923 filter); 924 goto ldap_end; 925 } 926 if (ecount > 1) { 927 plog(LLV_WARNING, LOCATION, NULL, 928 "multiple (%i) ldap results for filter \'%s\'\n", 929 ecount, filter); 930 } 931 932 /* obtain the dn from the first result */ 933 le = ldap_first_entry(ld, lr); 934 if (le == NULL) { 935 plog(LLV_ERROR, LOCATION, NULL, 936 "ldap_first_entry failed: invalid entry returned\n"); 937 goto ldap_end; 938 } 939 userdn = ldap_get_dn(ld, le); 940 if (userdn == NULL) { 941 plog(LLV_ERROR, LOCATION, NULL, 942 "ldap_get_dn failed: invalid string returned\n"); 943 goto ldap_end; 944 } 945 946 /* cache the user dn in the xauth state */ 947 iph1->mode_cfg->xauth.udn = racoon_malloc(strlen(userdn)+1); 948 strcpy(iph1->mode_cfg->xauth.udn,userdn); 949 950 /* retrieve modecfg address */ 951 bv = ldap_get_values_len(ld, le, xauth_ldap_config.attr_addr->v); 952 if (bv != NULL) { 953 char tmpaddr[16]; 954 /* sanity check for address value */ 955 if ((bv[0]->bv_len < 7)||(bv[0]->bv_len > 15)) { 956 plog(LLV_DEBUG, LOCATION, NULL, 957 "ldap returned invalid modecfg address\n"); 958 ldap_value_free_len(bv); 959 goto ldap_end; 960 } 961 memcpy(tmpaddr,bv[0]->bv_val,bv[0]->bv_len); 962 tmpaddr[bv[0]->bv_len]=0; 963 iph1->mode_cfg->addr4.s_addr = inet_addr(tmpaddr); 964 iph1->mode_cfg->flags |= ISAKMP_CFG_ADDR4_EXTERN; 965 plog(LLV_INFO, LOCATION, NULL, 966 "ldap returned modecfg address %s\n", tmpaddr); 967 ldap_value_free_len(bv); 968 } 969 970 /* retrieve modecfg netmask */ 971 bv = ldap_get_values_len(ld, le, xauth_ldap_config.attr_mask->v); 972 if (bv != NULL) { 973 char tmpmask[16]; 974 /* sanity check for netmask value */ 975 if ((bv[0]->bv_len < 7)||(bv[0]->bv_len > 15)) { 976 plog(LLV_DEBUG, LOCATION, NULL, 977 "ldap returned invalid modecfg netmask\n"); 978 ldap_value_free_len(bv); 979 goto ldap_end; 980 } 981 memcpy(tmpmask,bv[0]->bv_val,bv[0]->bv_len); 982 tmpmask[bv[0]->bv_len]=0; 983 iph1->mode_cfg->mask4.s_addr = inet_addr(tmpmask); 984 iph1->mode_cfg->flags |= ISAKMP_CFG_MASK4_EXTERN; 985 plog(LLV_INFO, LOCATION, NULL, 986 "ldap returned modecfg netmask %s\n", tmpmask); 987 ldap_value_free_len(bv); 988 } 989 990 /* 991 * finally, use the dn and the xauth 992 * password to check the users given 993 * credentials by attempting to bind 994 * to the ldap server 995 */ 996 plog(LLV_INFO, LOCATION, NULL, 997 "attempting ldap bind for dn \'%s\'\n", userdn); 998 cred.bv_val = pwd; 999 cred.bv_len = strlen( cred.bv_val ); 1000 res = ldap_sasl_bind_s(ld, 1001 userdn, NULL, &cred, 1002 NULL, NULL, NULL); 1003 if(res==LDAP_SUCCESS) 1004 rtn = 0; 1005 1006 ldap_end: 1007 1008 /* free ldap resources */ 1009 if (userdn != NULL) 1010 ldap_memfree(userdn); 1011 if (atlist[0] != NULL) 1012 racoon_free(atlist[0]); 1013 if (atlist[1] != NULL) 1014 racoon_free(atlist[1]); 1015 if (filter != NULL) 1016 racoon_free(filter); 1017 if (lr != NULL) 1018 ldap_msgfree(lr); 1019 if (init != NULL) 1020 racoon_free(init); 1021 1022 ldap_unbind_ext_s(ld, NULL, NULL); 1023 1024 return rtn; 1025 } 1026 1027 int 1028 xauth_group_ldap(udn, grp) 1029 char * udn; 1030 char * grp; 1031 { 1032 int rtn = -1; 1033 int res = -1; 1034 LDAP *ld = NULL; 1035 LDAPMessage *lr = NULL; 1036 LDAPMessage *le = NULL; 1037 struct berval cred; 1038 struct timeval timeout; 1039 char *init = NULL; 1040 char *filter = NULL; 1041 char *basedn = NULL; 1042 char *groupdn = NULL; 1043 int tmplen = 0; 1044 int ecount = 0; 1045 int scope = LDAP_SCOPE_ONE; 1046 1047 /* build our initialization url */ 1048 tmplen = strlen("ldap://:") + 17; 1049 tmplen += strlen(xauth_ldap_config.host->v); 1050 init = racoon_malloc(tmplen); 1051 if (init == NULL) { 1052 plog(LLV_ERROR, LOCATION, NULL, 1053 "unable to alloc ldap init url\n"); 1054 goto ldap_group_end; 1055 } 1056 sprintf(init,"ldap://%s:%d", 1057 xauth_ldap_config.host->v, 1058 xauth_ldap_config.port ); 1059 1060 /* initialize the ldap handle */ 1061 res = ldap_initialize(&ld, init); 1062 if (res != LDAP_SUCCESS) { 1063 plog(LLV_ERROR, LOCATION, NULL, 1064 "ldap_initialize failed: %s\n", 1065 ldap_err2string(res)); 1066 goto ldap_group_end; 1067 } 1068 1069 /* initialize the protocol version */ 1070 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, 1071 &xauth_ldap_config.pver); 1072 1073 /* 1074 * attempt to bind to the ldap server. 1075 * default to anonymous bind unless a 1076 * user dn and password has been 1077 * specified in our configuration 1078 */ 1079 if ((xauth_ldap_config.bind_dn != NULL)&& 1080 (xauth_ldap_config.bind_pw != NULL)) 1081 { 1082 cred.bv_val = xauth_ldap_config.bind_pw->v; 1083 cred.bv_len = strlen( cred.bv_val ); 1084 res = ldap_sasl_bind_s(ld, 1085 xauth_ldap_config.bind_dn->v, NULL, &cred, 1086 NULL, NULL, NULL); 1087 } 1088 else 1089 { 1090 res = ldap_sasl_bind_s(ld, 1091 NULL, NULL, NULL, 1092 NULL, NULL, NULL); 1093 } 1094 1095 if (res!=LDAP_SUCCESS) { 1096 plog(LLV_ERROR, LOCATION, NULL, 1097 "ldap_sasl_bind_s (search) failed: %s\n", 1098 ldap_err2string(res)); 1099 goto ldap_group_end; 1100 } 1101 1102 /* build an ldap group search filter */ 1103 tmplen = strlen("(&(=)(=))") + 1; 1104 tmplen += strlen(xauth_ldap_config.attr_group->v); 1105 tmplen += strlen(grp); 1106 tmplen += strlen(xauth_ldap_config.attr_member->v); 1107 tmplen += strlen(udn); 1108 filter = racoon_malloc(tmplen); 1109 if (filter == NULL) { 1110 plog(LLV_ERROR, LOCATION, NULL, 1111 "unable to alloc ldap search filter buffer\n"); 1112 goto ldap_group_end; 1113 } 1114 sprintf(filter, "(&(%s=%s)(%s=%s))", 1115 xauth_ldap_config.attr_group->v, grp, 1116 xauth_ldap_config.attr_member->v, udn); 1117 1118 /* attempt to locate the group dn */ 1119 if (xauth_ldap_config.base != NULL) 1120 basedn = xauth_ldap_config.base->v; 1121 if (xauth_ldap_config.subtree) 1122 scope = LDAP_SCOPE_SUBTREE; 1123 timeout.tv_sec = 15; 1124 timeout.tv_usec = 0; 1125 res = ldap_search_ext_s(ld, basedn, scope, 1126 filter, NULL, 0, NULL, NULL, 1127 &timeout, 2, &lr); 1128 if (res != LDAP_SUCCESS) { 1129 plog(LLV_ERROR, LOCATION, NULL, 1130 "ldap_search_ext_s failed: %s\n", 1131 ldap_err2string(res)); 1132 goto ldap_group_end; 1133 } 1134 1135 /* check the number of ldap entries returned */ 1136 ecount = ldap_count_entries(ld, lr); 1137 if (ecount < 1) { 1138 plog(LLV_WARNING, LOCATION, NULL, 1139 "no ldap results for filter \'%s\'\n", 1140 filter); 1141 goto ldap_group_end; 1142 } 1143 1144 /* success */ 1145 rtn = 0; 1146 1147 /* obtain the dn from the first result */ 1148 le = ldap_first_entry(ld, lr); 1149 if (le == NULL) { 1150 plog(LLV_ERROR, LOCATION, NULL, 1151 "ldap_first_entry failed: invalid entry returned\n"); 1152 goto ldap_group_end; 1153 } 1154 groupdn = ldap_get_dn(ld, le); 1155 if (groupdn == NULL) { 1156 plog(LLV_ERROR, LOCATION, NULL, 1157 "ldap_get_dn failed: invalid string returned\n"); 1158 goto ldap_group_end; 1159 } 1160 1161 plog(LLV_INFO, LOCATION, NULL, 1162 "ldap membership group returned \'%s\'\n", groupdn); 1163 ldap_group_end: 1164 1165 /* free ldap resources */ 1166 if (groupdn != NULL) 1167 ldap_memfree(groupdn); 1168 if (filter != NULL) 1169 racoon_free(filter); 1170 if (lr != NULL) 1171 ldap_msgfree(lr); 1172 if (init != NULL) 1173 racoon_free(init); 1174 1175 ldap_unbind_ext_s(ld, NULL, NULL); 1176 1177 return rtn; 1178 } 1179 1180 #endif 1181 1182 #ifndef ANDROID_PATCHED 1183 1184 int 1185 xauth_login_system(usr, pwd) 1186 char *usr; 1187 char *pwd; 1188 { 1189 struct passwd *pw; 1190 char *cryptpwd; 1191 char *syscryptpwd; 1192 #ifdef HAVE_SHADOW_H 1193 struct spwd *spw; 1194 1195 if ((spw = getspnam(usr)) == NULL) 1196 return -1; 1197 1198 syscryptpwd = spw->sp_pwdp; 1199 #endif 1200 1201 if ((pw = getpwnam(usr)) == NULL) 1202 return -1; 1203 1204 #ifndef HAVE_SHADOW_H 1205 syscryptpwd = pw->pw_passwd; 1206 #endif 1207 1208 /* No root login. Ever. */ 1209 if (pw->pw_uid == 0) 1210 return -1; 1211 1212 if ((cryptpwd = crypt(pwd, syscryptpwd)) == NULL) 1213 return -1; 1214 1215 if (strcmp(cryptpwd, syscryptpwd) == 0) 1216 return 0; 1217 1218 return -1; 1219 } 1220 1221 #endif 1222 1223 int 1224 xauth_group_system(usr, grp) 1225 char * usr; 1226 char * grp; 1227 { 1228 struct group * gr; 1229 char * member; 1230 int index = 0; 1231 1232 gr = getgrnam(grp); 1233 if (gr == NULL) { 1234 plog(LLV_ERROR, LOCATION, NULL, 1235 "the system group name \'%s\' is unknown\n", 1236 grp); 1237 return -1; 1238 } 1239 1240 while ((member = gr->gr_mem[index++])!=NULL) { 1241 if (!strcmp(member,usr)) { 1242 plog(LLV_INFO, LOCATION, NULL, 1243 "membership validated\n"); 1244 return 0; 1245 } 1246 } 1247 1248 return -1; 1249 } 1250 1251 int 1252 xauth_check(iph1) 1253 struct ph1handle *iph1; 1254 { 1255 struct xauth_state *xst = &iph1->mode_cfg->xauth; 1256 1257 /* 1258 * Only the server side (edge device) really check for Xauth 1259 * status. It does it if the chose authmethod is using Xauth. 1260 * On the client side (roadwarrior), we don't check anything. 1261 */ 1262 switch (AUTHMETHOD(iph1)) { 1263 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_R: 1264 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_R: 1265 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_PSKEY_R: 1266 /* The following are not yet implemented */ 1267 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_R: 1268 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_R: 1269 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_R: 1270 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_R: 1271 if ((iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) == 0) { 1272 plog(LLV_ERROR, LOCATION, NULL, 1273 "Hybrid auth negotiated but peer did not " 1274 "announced as Xauth capable\n"); 1275 return -1; 1276 } 1277 1278 if (xst->status != XAUTHST_OK) { 1279 plog(LLV_ERROR, LOCATION, NULL, 1280 "Hybrid auth negotiated but peer did not " 1281 "succeed Xauth exchange\n"); 1282 return -1; 1283 } 1284 1285 return 0; 1286 break; 1287 default: 1288 return 0; 1289 break; 1290 } 1291 1292 return 0; 1293 } 1294 1295 int 1296 group_check(iph1, grp_list, grp_count) 1297 struct ph1handle *iph1; 1298 char **grp_list; 1299 int grp_count; 1300 { 1301 int res = -1; 1302 int grp_index = 0; 1303 char * usr = NULL; 1304 1305 /* check for presence of modecfg data */ 1306 1307 if(iph1->mode_cfg == NULL) { 1308 plog(LLV_ERROR, LOCATION, NULL, 1309 "xauth group specified but modecfg not found\n"); 1310 return res; 1311 } 1312 1313 /* loop through our group list */ 1314 1315 for(; grp_index < grp_count; grp_index++) { 1316 1317 /* check for presence of xauth data */ 1318 1319 usr = iph1->mode_cfg->xauth.authdata.generic.usr; 1320 1321 if(usr == NULL) { 1322 plog(LLV_ERROR, LOCATION, NULL, 1323 "xauth group specified but xauth not found\n"); 1324 return res; 1325 } 1326 1327 /* call appropriate group validation funtion */ 1328 1329 switch (isakmp_cfg_config.groupsource) { 1330 1331 case ISAKMP_CFG_GROUP_SYSTEM: 1332 res = xauth_group_system( 1333 usr, 1334 grp_list[grp_index]); 1335 break; 1336 1337 #ifdef HAVE_LIBLDAP 1338 case ISAKMP_CFG_GROUP_LDAP: 1339 res = xauth_group_ldap( 1340 iph1->mode_cfg->xauth.udn, 1341 grp_list[grp_index]); 1342 break; 1343 #endif 1344 1345 default: 1346 /* we should never get here */ 1347 plog(LLV_ERROR, LOCATION, NULL, 1348 "Unknown group auth source\n"); 1349 break; 1350 } 1351 1352 if( !res ) { 1353 plog(LLV_INFO, LOCATION, NULL, 1354 "user \"%s\" is a member of group \"%s\"\n", 1355 usr, 1356 grp_list[grp_index]); 1357 break; 1358 } else { 1359 plog(LLV_INFO, LOCATION, NULL, 1360 "user \"%s\" is not a member of group \"%s\"\n", 1361 usr, 1362 grp_list[grp_index]); 1363 } 1364 } 1365 1366 return res; 1367 } 1368 1369 vchar_t * 1370 isakmp_xauth_req(iph1, attr) 1371 struct ph1handle *iph1; 1372 struct isakmp_data *attr; 1373 { 1374 int type; 1375 size_t dlen = 0; 1376 int ashort = 0; 1377 int value = 0; 1378 vchar_t *buffer = NULL; 1379 char *mraw = NULL, *mdata; 1380 char *data; 1381 vchar_t *usr = NULL; 1382 vchar_t *pwd = NULL; 1383 size_t skip = 0; 1384 int freepwd = 0; 1385 1386 if ((iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) == 0) { 1387 plog(LLV_ERROR, LOCATION, NULL, 1388 "Xauth mode config request but peer " 1389 "did not declare itself as Xauth capable\n"); 1390 return NULL; 1391 } 1392 1393 type = ntohs(attr->type) & ~ISAKMP_GEN_MASK; 1394 1395 /* Sanity checks */ 1396 switch(type) { 1397 case XAUTH_TYPE: 1398 if ((ntohs(attr->type) & ISAKMP_GEN_TV) == 0) { 1399 plog(LLV_ERROR, LOCATION, NULL, 1400 "Unexpected long XAUTH_TYPE attribute\n"); 1401 return NULL; 1402 } 1403 if (ntohs(attr->lorv) != XAUTH_TYPE_GENERIC) { 1404 plog(LLV_ERROR, LOCATION, NULL, 1405 "Unsupported Xauth authentication %d\n", 1406 ntohs(attr->lorv)); 1407 return NULL; 1408 } 1409 ashort = 1; 1410 dlen = 0; 1411 value = XAUTH_TYPE_GENERIC; 1412 break; 1413 1414 case XAUTH_USER_NAME: 1415 if (!iph1->rmconf->xauth || !iph1->rmconf->xauth->login) { 1416 plog(LLV_ERROR, LOCATION, NULL, "Xauth performed " 1417 "with no login supplied\n"); 1418 return NULL; 1419 } 1420 1421 dlen = iph1->rmconf->xauth->login->l - 1; 1422 iph1->rmconf->xauth->state |= XAUTH_SENT_USERNAME; 1423 break; 1424 1425 #ifdef ANDROID_PATCHED 1426 case XAUTH_PASSCODE: 1427 #endif 1428 case XAUTH_USER_PASSWORD: 1429 if (!iph1->rmconf->xauth || !iph1->rmconf->xauth->login) 1430 return NULL; 1431 1432 skip = sizeof(struct ipsecdoi_id_b); 1433 usr = vmalloc(iph1->rmconf->xauth->login->l - 1 + skip); 1434 if (usr == NULL) { 1435 plog(LLV_ERROR, LOCATION, NULL, 1436 "Cannot allocate memory\n"); 1437 return NULL; 1438 } 1439 memset(usr->v, 0, skip); 1440 memcpy(usr->v + skip, 1441 iph1->rmconf->xauth->login->v, 1442 iph1->rmconf->xauth->login->l - 1); 1443 1444 if (iph1->rmconf->xauth->pass) { 1445 /* A key given through racoonctl */ 1446 pwd = iph1->rmconf->xauth->pass; 1447 } else { 1448 if ((pwd = getpskbyname(usr)) == NULL) { 1449 plog(LLV_ERROR, LOCATION, NULL, 1450 "No password was found for login %s\n", 1451 iph1->rmconf->xauth->login->v); 1452 vfree(usr); 1453 return NULL; 1454 } 1455 /* We have to free it before returning */ 1456 freepwd = 1; 1457 } 1458 vfree(usr); 1459 1460 iph1->rmconf->xauth->state |= XAUTH_SENT_PASSWORD; 1461 dlen = pwd->l; 1462 1463 break; 1464 case XAUTH_MESSAGE: 1465 if ((ntohs(attr->type) & ISAKMP_GEN_TV) == 0) { 1466 dlen = ntohs(attr->lorv); 1467 if (dlen > 0) { 1468 mraw = (char*)(attr + 1); 1469 mdata = binsanitize(mraw, dlen); 1470 if (mdata == NULL) { 1471 plog(LLV_ERROR, LOCATION, iph1->remote, 1472 "Cannot allocate memory\n"); 1473 return NULL; 1474 } 1475 plog(LLV_NOTIFY,LOCATION, iph1->remote, 1476 "XAUTH Message: '%s'.\n", 1477 mdata); 1478 racoon_free(mdata); 1479 } 1480 } 1481 return NULL; 1482 default: 1483 plog(LLV_WARNING, LOCATION, NULL, 1484 "Ignored attribute %s\n", s_isakmp_cfg_type(type)); 1485 return NULL; 1486 break; 1487 } 1488 1489 if ((buffer = vmalloc(sizeof(*attr) + dlen)) == NULL) { 1490 plog(LLV_ERROR, LOCATION, NULL, 1491 "Cannot allocate memory\n"); 1492 goto out; 1493 } 1494 1495 attr = (struct isakmp_data *)buffer->v; 1496 if (ashort) { 1497 attr->type = htons(type | ISAKMP_GEN_TV); 1498 attr->lorv = htons(value); 1499 goto out; 1500 } 1501 1502 attr->type = htons(type | ISAKMP_GEN_TLV); 1503 attr->lorv = htons(dlen); 1504 data = (char *)(attr + 1); 1505 1506 switch(type) { 1507 case XAUTH_USER_NAME: 1508 /* 1509 * iph1->rmconf->xauth->login->v is valid, 1510 * we just checked it in the previous switch case 1511 */ 1512 memcpy(data, iph1->rmconf->xauth->login->v, dlen); 1513 break; 1514 #ifdef ANDROID_PATCHED 1515 case XAUTH_PASSCODE: 1516 #endif 1517 case XAUTH_USER_PASSWORD: 1518 memcpy(data, pwd->v, dlen); 1519 break; 1520 default: 1521 break; 1522 } 1523 1524 out: 1525 if (freepwd) 1526 vfree(pwd); 1527 1528 return buffer; 1529 } 1530 1531 vchar_t * 1532 isakmp_xauth_set(iph1, attr) 1533 struct ph1handle *iph1; 1534 struct isakmp_data *attr; 1535 { 1536 int type; 1537 vchar_t *buffer = NULL; 1538 char *data; 1539 struct xauth_state *xst; 1540 size_t dlen = 0; 1541 char* mraw = NULL, *mdata; 1542 1543 if ((iph1->mode_cfg->flags & ISAKMP_CFG_VENDORID_XAUTH) == 0) { 1544 plog(LLV_ERROR, LOCATION, NULL, 1545 "Xauth mode config set but peer " 1546 "did not declare itself as Xauth capable\n"); 1547 return NULL; 1548 } 1549 1550 type = ntohs(attr->type) & ~ISAKMP_GEN_MASK; 1551 1552 switch(type) { 1553 case XAUTH_STATUS: 1554 /* 1555 * We should only receive ISAKMP mode_cfg SET XAUTH_STATUS 1556 * when running as a client (initiator). 1557 */ 1558 xst = &iph1->mode_cfg->xauth; 1559 switch(AUTHMETHOD(iph1)) { 1560 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_RSA_I: 1561 case FICTIVE_AUTH_METHOD_XAUTH_PSKEY_I: 1562 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSASIG_I: 1563 /* Not implemented ... */ 1564 case OAKLEY_ATTR_AUTH_METHOD_HYBRID_DSS_I: 1565 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_DSSSIG_I: 1566 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAENC_I: 1567 case OAKLEY_ATTR_AUTH_METHOD_XAUTH_RSAREV_I: 1568 break; 1569 default: 1570 plog(LLV_ERROR, LOCATION, NULL, 1571 "Unexpected XAUTH_STATUS_OK\n"); 1572 return NULL; 1573 break; 1574 } 1575 1576 /* If we got a failure, delete iph1 */ 1577 if (ntohs(attr->lorv) != XAUTH_STATUS_OK) { 1578 plog(LLV_ERROR, LOCATION, NULL, 1579 "Xauth authentication failed\n"); 1580 1581 EVT_PUSH(iph1->local, iph1->remote, 1582 EVTT_XAUTH_FAILED, NULL); 1583 1584 iph1->mode_cfg->flags |= ISAKMP_CFG_DELETE_PH1; 1585 } else { 1586 EVT_PUSH(iph1->local, iph1->remote, 1587 EVTT_XAUTH_SUCCESS, NULL); 1588 } 1589 1590 1591 /* We acknowledge it */ 1592 break; 1593 case XAUTH_MESSAGE: 1594 if ((ntohs(attr->type) & ISAKMP_GEN_TV) == 0) { 1595 dlen = ntohs(attr->lorv); 1596 if (dlen > 0) { 1597 mraw = (char*)(attr + 1); 1598 mdata = binsanitize(mraw, dlen); 1599 if (mdata == NULL) { 1600 plog(LLV_ERROR, LOCATION, iph1->remote, 1601 "Cannot allocate memory\n"); 1602 return NULL; 1603 } 1604 plog(LLV_NOTIFY,LOCATION, iph1->remote, 1605 "XAUTH Message: '%s'.\n", 1606 mdata); 1607 racoon_free(mdata); 1608 } 1609 } 1610 1611 default: 1612 plog(LLV_WARNING, LOCATION, NULL, 1613 "Ignored attribute %s\n", s_isakmp_cfg_type(type)); 1614 return NULL; 1615 break; 1616 } 1617 1618 if ((buffer = vmalloc(sizeof(*attr))) == NULL) { 1619 plog(LLV_ERROR, LOCATION, NULL, 1620 "Cannot allocate memory\n"); 1621 return NULL; 1622 } 1623 1624 attr = (struct isakmp_data *)buffer->v; 1625 attr->type = htons(type | ISAKMP_GEN_TV); 1626 attr->lorv = htons(0); 1627 1628 return buffer; 1629 } 1630 1631 1632 void 1633 xauth_rmstate(xst) 1634 struct xauth_state *xst; 1635 { 1636 switch (xst->authtype) { 1637 case XAUTH_TYPE_GENERIC: 1638 if (xst->authdata.generic.usr) 1639 racoon_free(xst->authdata.generic.usr); 1640 1641 if (xst->authdata.generic.pwd) 1642 racoon_free(xst->authdata.generic.pwd); 1643 1644 break; 1645 1646 case XAUTH_TYPE_CHAP: 1647 case XAUTH_TYPE_OTP: 1648 case XAUTH_TYPE_SKEY: 1649 plog(LLV_WARNING, LOCATION, NULL, 1650 "Unsupported authtype %d\n", xst->authtype); 1651 break; 1652 1653 default: 1654 plog(LLV_WARNING, LOCATION, NULL, 1655 "Unexpected authtype %d\n", xst->authtype); 1656 break; 1657 } 1658 1659 #ifdef HAVE_LIBLDAP 1660 if (xst->udn != NULL) 1661 racoon_free(xst->udn); 1662 #endif 1663 return; 1664 } 1665 1666 int 1667 xauth_rmconf_used(xauth_rmconf) 1668 struct xauth_rmconf **xauth_rmconf; 1669 { 1670 if (*xauth_rmconf == NULL) { 1671 *xauth_rmconf = racoon_malloc(sizeof(**xauth_rmconf)); 1672 if (*xauth_rmconf == NULL) { 1673 plog(LLV_ERROR, LOCATION, NULL, 1674 "xauth_rmconf_used: malloc failed\n"); 1675 return -1; 1676 } 1677 1678 (*xauth_rmconf)->login = NULL; 1679 (*xauth_rmconf)->pass = NULL; 1680 (*xauth_rmconf)->state = 0; 1681 } 1682 1683 return 0; 1684 } 1685 1686 void 1687 xauth_rmconf_delete(xauth_rmconf) 1688 struct xauth_rmconf **xauth_rmconf; 1689 { 1690 if (*xauth_rmconf != NULL) { 1691 if ((*xauth_rmconf)->login != NULL) 1692 vfree((*xauth_rmconf)->login); 1693 if ((*xauth_rmconf)->pass != NULL) 1694 vfree((*xauth_rmconf)->pass); 1695 1696 racoon_free(*xauth_rmconf); 1697 *xauth_rmconf = NULL; 1698 } 1699 1700 return; 1701 } 1702
