| 1 | /* |
| 2 | ** Copyright 2016 Double Precision, Inc. See COPYING for |
| 3 | ** distribution information. |
| 4 | */ |
| 5 | |
| 6 | #if HAVE_CONFIG_H |
| 7 | #include "courier_auth_config.h" |
| 8 | #endif |
| 9 | #include <string> |
| 10 | #include <sstream> |
| 11 | #include <map> |
| 12 | #include <vector> |
| 13 | #include <algorithm> |
| 14 | #include <cctype> |
| 15 | |
| 16 | #if HAVE_LBER_H |
| 17 | #include <lber.h> |
| 18 | #endif |
| 19 | #if HAVE_LDAP_H |
| 20 | #include <ldap.h> |
| 21 | #endif |
| 22 | #include <pwd.h> |
| 23 | #include <grp.h> |
| 24 | #include <errno.h> |
| 25 | #include <time.h> |
| 26 | #if HAVE_SYS_TIME_H |
| 27 | #include <sys/time.h> |
| 28 | #endif |
| 29 | #if HAVE_SYS_STAT_H |
| 30 | #include <sys/stat.h> |
| 31 | #endif |
| 32 | |
| 33 | extern "C" { |
| 34 | #include "authldap.h" |
| 35 | #include "auth.h" |
| 36 | #include "authldaprc.h" |
| 37 | #include "courierauthdebug.h" |
| 38 | }; |
| 39 | |
| 40 | #include "authconfigfile.h" |
| 41 | #include <stdio.h> |
| 42 | |
| 43 | #ifndef LDAP_OPT_SUCCESS |
| 44 | #define LDAP_OPT_SUCCESS LDAP_SUCCESS |
| 45 | #endif |
| 46 | |
| 47 | /* |
| 48 | ** Main connection to the LDAP server, and a separate connection for the |
| 49 | ** LDAP_AUTHBIND option. |
| 50 | */ |
| 51 | |
| 52 | class ldap_connection { |
| 53 | |
| 54 | public: |
| 55 | LDAP *connection; |
| 56 | |
| 57 | ldap_connection() : connection(0) {} |
| 58 | ~ldap_connection() { disconnect(); } |
| 59 | |
| 60 | bool connected() const { return connection != 0; } |
| 61 | |
| 62 | bool connect(); |
| 63 | void disconnect(); |
| 64 | void close(); |
| 65 | |
| 66 | private: |
| 67 | bool enable_tls(); |
| 68 | |
| 69 | public: |
| 70 | |
| 71 | static bool ok(const char *method, int rc) |
| 72 | { |
| 73 | if (rc == 0 || LDAP_NAME_ERROR(rc)) |
| 74 | return true; |
| 75 | |
| 76 | courier_auth_err("%s failed: %s", method, |
| 77 | ldap_err2string(rc)); |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | bool bind(const std::string &userid, |
| 82 | const std::string &password) |
| 83 | { |
| 84 | std::vector<char> buffer(password.begin(), password.end()); |
| 85 | struct berval cred; |
| 86 | |
| 87 | cred.bv_len=buffer.size(); |
| 88 | cred.bv_val=&buffer[0]; |
| 89 | |
| 90 | if (connect() && |
| 91 | ok("ldap_sasl_bind_s", |
| 92 | ldap_sasl_bind_s(connection, userid.c_str(), |
| 93 | NULL, &cred, |
| 94 | NULL, NULL, NULL))) |
| 95 | return true; |
| 96 | |
| 97 | disconnect(); |
| 98 | return connect() && |
| 99 | ok("ldap_sasl_bind_s", |
| 100 | ldap_sasl_bind_s(connection, userid.c_str(), |
| 101 | NULL, &cred, |
| 102 | NULL, NULL, NULL)); |
| 103 | } |
| 104 | }; |
| 105 | |
| 106 | ldap_connection main_connection, bind_connection; |
| 107 | |
| 108 | |
| 109 | // Loaded and parsed authldaprc configuration file. |
| 110 | |
| 111 | class authldaprc_file : public courier::auth::config_file { |
| 112 | |
| 113 | public: |
| 114 | |
| 115 | int protocol_version; |
| 116 | int timeout; |
| 117 | int authbind; |
| 118 | int initbind; |
| 119 | int tls; |
| 120 | uid_t uid; |
| 121 | gid_t gid; |
| 122 | |
| 123 | std::string ldap_uri, ldap_binddn, ldap_bindpw, ldap_basedn; |
| 124 | int ldap_deref; |
| 125 | |
| 126 | std::vector<std::string> auxoptions, auxnames; |
| 127 | |
| 128 | authldaprc_file(); |
| 129 | |
| 130 | private: |
| 131 | bool do_load(); |
| 132 | void do_reload(); |
| 133 | public: |
| 134 | }; |
| 135 | |
| 136 | /* |
| 137 | ** There's a memory leak in OpenLDAP 1.2.11, presumably in earlier versions |
| 138 | ** too. See http://www.OpenLDAP.org/its/index.cgi?findid=864 for more |
| 139 | ** information. To work around the bug, the first time a connection fails |
| 140 | ** we stop trying for 60 seconds. After 60 seconds we kill the process, |
| 141 | ** and let the parent process restart it. |
| 142 | ** |
| 143 | ** We'll control this behavior via LDAP_MEMORY_LEAK. Set it to ZERO to turn |
| 144 | ** off this behavior (whenever OpenLDAP gets fixed). |
| 145 | */ |
| 146 | |
| 147 | static time_t ldapfailflag=0; |
| 148 | |
| 149 | static void ldapconnfailure() |
| 150 | { |
| 151 | const char *p=getenv("LDAP_MEMORY_LEAK"); |
| 152 | |
| 153 | if (!p) |
| 154 | { |
| 155 | #ifdef LDAP_VENDOR_NAME |
| 156 | #ifdef LDAP_VENDOR_VERSION |
| 157 | #define DO_OPENLDAP_CHECK |
| 158 | #endif |
| 159 | #endif |
| 160 | |
| 161 | #ifdef DO_OPENLDAP_CHECK |
| 162 | |
| 163 | /* It's supposed to be fixed in 20019 */ |
| 164 | |
| 165 | if (strcmp(LDAP_VENDOR_NAME, "OpenLDAP") == 0 && |
| 166 | LDAP_VENDOR_VERSION < 20019) |
| 167 | p="1"; |
| 168 | else |
| 169 | p="0"; |
| 170 | #else |
| 171 | p="0"; |
| 172 | #endif |
| 173 | } |
| 174 | |
| 175 | if (atoi(p) && !ldapfailflag) |
| 176 | { |
| 177 | time(&ldapfailflag); |
| 178 | ldapfailflag += 60; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | static int ldapconncheck() |
| 183 | { |
| 184 | time_t t; |
| 185 | |
| 186 | if (!ldapfailflag) |
| 187 | return (0); |
| 188 | |
| 189 | time(&t); |
| 190 | |
| 191 | if (t >= ldapfailflag) |
| 192 | exit(0); |
| 193 | return (1); |
| 194 | } |
| 195 | |
| 196 | authldaprc_file::authldaprc_file() |
| 197 | : config_file(AUTHLDAPRC) |
| 198 | { |
| 199 | } |
| 200 | |
| 201 | bool authldaprc_file::do_load() |
| 202 | { |
| 203 | bool loaded=true; |
| 204 | |
| 205 | // Frequently-accessed variables. |
| 206 | |
| 207 | if (!config("LDAP_TIMEOUT", timeout, false, "5") || |
| 208 | !config("LDAP_TLS", tls, false, "0")) |
| 209 | { |
| 210 | loaded=false; |
| 211 | } |
| 212 | |
| 213 | if (!config("LDAP_URI", ldap_uri, true)) |
| 214 | { |
| 215 | loaded=false; |
| 216 | } |
| 217 | |
| 218 | ldap_deref=0; |
| 219 | |
| 220 | std::string deref_setting; |
| 221 | |
| 222 | config("LDAP_DEREF", deref_setting, false, ""); |
| 223 | |
| 224 | for (std::string::iterator p=deref_setting.begin(); |
| 225 | p != deref_setting.end(); ++p) |
| 226 | *p=std::tolower(*p); |
| 227 | |
| 228 | #ifdef LDAP_OPT_DEREF |
| 229 | |
| 230 | ldap_deref=LDAP_DEREF_NEVER; |
| 231 | |
| 232 | if (deref_setting == "never") |
| 233 | ldap_deref = LDAP_DEREF_NEVER; |
| 234 | else if (deref_setting == "searching") |
| 235 | ldap_deref = LDAP_DEREF_SEARCHING; |
| 236 | else if (deref_setting == "finding") |
| 237 | ldap_deref = LDAP_DEREF_FINDING; |
| 238 | else if (deref_setting == "always") |
| 239 | ldap_deref = LDAP_DEREF_ALWAYS; |
| 240 | else if (deref_setting != "") |
| 241 | { |
| 242 | loaded=false; |
| 243 | courier_auth_err("authldap: INVALID LDAP_OPT_DEREF"); |
| 244 | } |
| 245 | #endif |
| 246 | uid=0; |
| 247 | gid=0; |
| 248 | |
| 249 | std::string uid_str, gid_str; |
| 250 | |
| 251 | config("LDAP_GLOB_UID", uid_str, false); |
| 252 | config("LDAP_GLOB_GID", gid_str, false); |
| 253 | |
| 254 | if (!uid_str.empty()) |
| 255 | { |
| 256 | std::istringstream i(uid_str); |
| 257 | |
| 258 | i >> uid; |
| 259 | |
| 260 | if (i.fail()) |
| 261 | { |
| 262 | struct passwd *pwent=getpwnam(uid_str.c_str()); |
| 263 | |
| 264 | if (!pwent) |
| 265 | { |
| 266 | courier_auth_err("authldap: INVALID LDAP_GLOB_UID"); |
| 267 | loaded=false; |
| 268 | } |
| 269 | else |
| 270 | { |
| 271 | uid=pwent->pw_uid; |
| 272 | } |
| 273 | } |
| 274 | } |
| 275 | |
| 276 | if (!gid_str.empty()) |
| 277 | { |
| 278 | std::istringstream i(uid_str); |
| 279 | |
| 280 | i >> gid; |
| 281 | |
| 282 | if (i.fail()) |
| 283 | { |
| 284 | struct group *grent=getgrnam(gid_str.c_str()); |
| 285 | |
| 286 | if (!grent) |
| 287 | { |
| 288 | courier_auth_err("authldap: INVALID LDAP_GLOB_GID"); |
| 289 | loaded=false; |
| 290 | } |
| 291 | else |
| 292 | { |
| 293 | gid=grent->gr_gid; |
| 294 | } |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | if (!config("LDAP_AUTHBIND", authbind, false, "0") |
| 299 | || !config("LDAP_INITBIND", initbind, false, "0") |
| 300 | || !config("LDAP_BASEDN", ldap_basedn, true)) |
| 301 | loaded=false; |
| 302 | |
| 303 | if (initbind) |
| 304 | { |
| 305 | if (!config("LDAP_BINDDN", ldap_binddn, true) || |
| 306 | !config("LDAP_BINDPW", ldap_bindpw, true)) |
| 307 | loaded=false; |
| 308 | } |
| 309 | |
| 310 | if (!config("LDAP_PROTOCOL_VERSION", protocol_version, false, "0")) |
| 311 | loaded=false; |
| 312 | |
| 313 | if (protocol_version) |
| 314 | { |
| 315 | #ifndef LDAP_OPT_PROTOCOL_VERSION |
| 316 | courier_auth_err("authldaplib: LDAP_OPT_PROTOCOL_VERSION ignored"); |
| 317 | loaded=false; |
| 318 | #endif |
| 319 | if (0 |
| 320 | #ifdef LDAP_VERSION_MIN |
| 321 | || protocol_version < LDAP_VERSION_MIN |
| 322 | #endif |
| 323 | #ifdef LDAP_VERSION_MAX |
| 324 | || protocol_version > LDAP_VERSION_MAX |
| 325 | #endif |
| 326 | ) |
| 327 | { |
| 328 | protocol_version=0; |
| 329 | courier_auth_err("authldaplib: LDAP_PROTOCOL_VERSION not supported"); |
| 330 | loaded=false; |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | std::string auxoptions_str; |
| 335 | |
| 336 | config("LDAP_AUXOPTIONS", auxoptions_str, ""); |
| 337 | |
| 338 | std::string::iterator p=auxoptions_str.begin(); |
| 339 | |
| 340 | while (p != auxoptions_str.end()) |
| 341 | { |
| 342 | if (*p == ',') |
| 343 | { |
| 344 | ++p; |
| 345 | continue; |
| 346 | } |
| 347 | |
| 348 | std::string::iterator q=p; |
| 349 | |
| 350 | p=std::find(p, auxoptions_str.end(), ','); |
| 351 | |
| 352 | std::string auxoption(q, p); |
| 353 | std::string auxname; |
| 354 | |
| 355 | q=std::find(auxoption.begin(), auxoption.end(), '='); |
| 356 | |
| 357 | if (q != auxoption.end()) |
| 358 | { |
| 359 | auxname=std::string(q+1, auxoption.end()); |
| 360 | auxoption=std::string(auxoption.begin(), q); |
| 361 | } |
| 362 | |
| 363 | auxoptions.push_back(auxoption); |
| 364 | auxnames.push_back(auxname); |
| 365 | } |
| 366 | |
| 367 | return loaded; |
| 368 | } |
| 369 | |
| 370 | void authldaprc_file::do_reload() |
| 371 | { |
| 372 | // File changed, try to load it again. |
| 373 | |
| 374 | authldaprc_file new_file; |
| 375 | |
| 376 | if (new_file.load(true)) |
| 377 | { |
| 378 | *this=new_file; |
| 379 | DPRINTF("authldap: reloaded %s", filename); |
| 380 | |
| 381 | // If we reloaded the file, close the |
| 382 | // connections, so they can be reopened using |
| 383 | // the new config. |
| 384 | |
| 385 | main_connection.close(); |
| 386 | bind_connection.close(); |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | static authldaprc_file authldaprc; |
| 391 | |
| 392 | #if HAVE_LDAP_TLS |
| 393 | bool ldap_connection::enable_tls() |
| 394 | { |
| 395 | int version; |
| 396 | |
| 397 | if (!ok("ldap_get_option", |
| 398 | ldap_get_option(connection, LDAP_OPT_PROTOCOL_VERSION, |
| 399 | &version))) |
| 400 | return false; |
| 401 | |
| 402 | if (version < LDAP_VERSION3) |
| 403 | { |
| 404 | version = LDAP_VERSION3; |
| 405 | (void)ldap_set_option (connection, |
| 406 | LDAP_OPT_PROTOCOL_VERSION, |
| 407 | &version); |
| 408 | } |
| 409 | |
| 410 | if (!ok("ldap_start_tls_s", |
| 411 | ldap_start_tls_s(connection, NULL, NULL))) |
| 412 | return false; |
| 413 | |
| 414 | return true; |
| 415 | } |
| 416 | |
| 417 | #else |
| 418 | |
| 419 | bool ldap_connection::enable_tls() |
| 420 | { |
| 421 | courier_auth_err("authldaplib: TLS not available"); |
| 422 | return (-1); |
| 423 | } |
| 424 | #endif |
| 425 | |
| 426 | bool ldap_connection::connect() |
| 427 | { |
| 428 | if (connected()) return true; |
| 429 | |
| 430 | DPRINTF("authldaplib: connecting to %s", authldaprc.ldap_uri.c_str()); |
| 431 | |
| 432 | if (ldapconncheck()) |
| 433 | { |
| 434 | DPRINTF("authldaplib: timing out after failed connection"); |
| 435 | return (false); |
| 436 | } |
| 437 | |
| 438 | ldap_initialize(&connection, authldaprc.ldap_uri.c_str()); |
| 439 | |
| 440 | if (connection==NULL) |
| 441 | { |
| 442 | courier_auth_err("cannot connect to LDAP server (%s): %s", |
| 443 | authldaprc.ldap_uri.c_str(), strerror(errno)); |
| 444 | ldapconnfailure(); |
| 445 | } |
| 446 | #ifdef LDAP_OPT_NETWORK_TIMEOUT |
| 447 | else if (authldaprc.timeout > 0) |
| 448 | { |
| 449 | DPRINTF("timeout set to %d", authldaprc.timeout); |
| 450 | ldap_set_option (connection, LDAP_OPT_NETWORK_TIMEOUT, &authldaprc.timeout); |
| 451 | #endif |
| 452 | } |
| 453 | |
| 454 | #ifdef LDAP_OPT_PROTOCOL_VERSION |
| 455 | |
| 456 | if (authldaprc.protocol_version && |
| 457 | !ok("ldap_set_option", |
| 458 | ldap_set_option(connection, |
| 459 | LDAP_OPT_PROTOCOL_VERSION, |
| 460 | (void *) &authldaprc.protocol_version))) |
| 461 | { |
| 462 | disconnect(); |
| 463 | return false; |
| 464 | } |
| 465 | |
| 466 | if (authldaprc.protocol_version) |
| 467 | { |
| 468 | DPRINTF("selected ldap protocol version %d", authldaprc.protocol_version); |
| 469 | } |
| 470 | #endif |
| 471 | |
| 472 | if (authldaprc.tls && !enable_tls()) |
| 473 | { |
| 474 | disconnect(); |
| 475 | return false; |
| 476 | } |
| 477 | |
| 478 | #ifdef LDAP_OPT_DEREF |
| 479 | if (!ok("ldap_set_option", |
| 480 | ldap_set_option(connection, LDAP_OPT_DEREF, |
| 481 | (void *)&authldaprc.ldap_deref))) |
| 482 | { |
| 483 | disconnect(); |
| 484 | return (false); |
| 485 | } |
| 486 | #else |
| 487 | if (!deref_setting.empty()) |
| 488 | { |
| 489 | courier_auth_err("authldaplib: LDAP_OPT_DEREF not available, ignored"); |
| 490 | } |
| 491 | #endif |
| 492 | |
| 493 | return true; |
| 494 | } |
| 495 | |
| 496 | void ldap_connection::disconnect() |
| 497 | { |
| 498 | close(); |
| 499 | ldapconnfailure(); |
| 500 | } |
| 501 | |
| 502 | void ldap_connection::close() |
| 503 | { |
| 504 | if (connection == NULL) |
| 505 | return; |
| 506 | |
| 507 | ldap_unbind_ext(connection, 0, 0); |
| 508 | connection=NULL; |
| 509 | } |
| 510 | |
| 511 | static int ldapopen() |
| 512 | { |
| 513 | if (main_connection.connected()) return 0; |
| 514 | |
| 515 | if (!main_connection.connect()) |
| 516 | return 1; |
| 517 | |
| 518 | if (authldaprc.initbind) |
| 519 | { |
| 520 | /* Bind to server */ |
| 521 | if (courier_authdebug_login_level >= 2) |
| 522 | { |
| 523 | DPRINTF("binding to LDAP server as DN '%s', password '%s'", |
| 524 | authldaprc.ldap_binddn.empty() ? "<null>" |
| 525 | : authldaprc.ldap_binddn.c_str(), |
| 526 | authldaprc.ldap_bindpw.empty() ? "<null>" |
| 527 | : authldaprc.ldap_bindpw.c_str()); |
| 528 | } |
| 529 | else |
| 530 | { |
| 531 | DPRINTF("binding to LDAP server as DN '%s'", |
| 532 | authldaprc.ldap_binddn.empty() ? "<null>" |
| 533 | : authldaprc.ldap_binddn.c_str()); |
| 534 | } |
| 535 | |
| 536 | if (!main_connection.bind(authldaprc.ldap_binddn, |
| 537 | authldaprc.ldap_bindpw)) |
| 538 | { |
| 539 | authldapclose(); |
| 540 | ldapconnfailure(); |
| 541 | return (-1); |
| 542 | } |
| 543 | } |
| 544 | return (0); |
| 545 | } |
| 546 | |
| 547 | class authldaprc_attributes { |
| 548 | |
| 549 | public: |
| 550 | |
| 551 | std::map<std::string, std::string *> attributes; |
| 552 | |
| 553 | std::string attribute(const char *name, |
| 554 | const char *default_value, |
| 555 | std::string &return_value) |
| 556 | { |
| 557 | std::string value; |
| 558 | |
| 559 | authldaprc.config(name, value, false, default_value); |
| 560 | |
| 561 | if (!value.empty()) |
| 562 | attributes[value]=&return_value; |
| 563 | return value; |
| 564 | } |
| 565 | }; |
| 566 | |
| 567 | class authldaprc_attribute_vector : public std::vector<std::string> { |
| 568 | |
| 569 | public: |
| 570 | |
| 571 | authldaprc_attribute_vector(const std::map<std::string, std::string *> |
| 572 | &attributes) |
| 573 | { |
| 574 | for (std::map<std::string, std::string *>::const_iterator |
| 575 | p=attributes.begin(); p != attributes.end(); ++p) |
| 576 | { |
| 577 | push_back(p->first); |
| 578 | } |
| 579 | } |
| 580 | }; |
| 581 | |
| 582 | class authldaprc_search_attributes { |
| 583 | |
| 584 | std::vector<std::string> copy_buffer; |
| 585 | |
| 586 | public: |
| 587 | |
| 588 | std::vector<char *> all_attributes_ptr; |
| 589 | |
| 590 | authldaprc_search_attributes(const std::vector<std::string> &attributes) |
| 591 | : copy_buffer(attributes) |
| 592 | { |
| 593 | for (std::vector<std::string>::iterator |
| 594 | p=copy_buffer.begin(); |
| 595 | p != copy_buffer.end(); ++p) |
| 596 | { |
| 597 | if (p->empty()) |
| 598 | continue; |
| 599 | |
| 600 | p->push_back(0); |
| 601 | all_attributes_ptr.push_back(& (*p)[0]); |
| 602 | } |
| 603 | |
| 604 | all_attributes_ptr.push_back(0); |
| 605 | } |
| 606 | |
| 607 | char **search_attributes() |
| 608 | { |
| 609 | return &all_attributes_ptr[0]; |
| 610 | } |
| 611 | }; |
| 612 | |
| 613 | class authldaprc_search_result : authldaprc_search_attributes { |
| 614 | |
| 615 | public: |
| 616 | |
| 617 | LDAPMessage *ptr; |
| 618 | bool finished; |
| 619 | |
| 620 | authldaprc_search_result(ldap_connection &conn, |
| 621 | const std::string &basedn, |
| 622 | const std::string &query, |
| 623 | const std::vector<std::string> &attributes, |
| 624 | const struct timeval &timeout) |
| 625 | : authldaprc_search_attributes(attributes), |
| 626 | ptr(NULL), finished(false) |
| 627 | { |
| 628 | struct timeval timeout_copy=timeout; |
| 629 | |
| 630 | if (!conn.connect() || |
| 631 | !conn.ok("ldap_search_ext_s", |
| 632 | ldap_search_ext_s(conn.connection, |
| 633 | basedn.c_str(), |
| 634 | LDAP_SCOPE_SUBTREE, |
| 635 | query.c_str(), |
| 636 | search_attributes(), |
| 637 | 0, |
| 638 | NULL, NULL, |
| 639 | &timeout_copy, |
| 640 | 100, &ptr))) |
| 641 | { |
| 642 | ptr=NULL; |
| 643 | conn.disconnect(); |
| 644 | if (!conn.connect() |
| 645 | || !conn.ok("ldap_search_ext_s", |
| 646 | ldap_search_ext_s(conn.connection, |
| 647 | basedn.c_str(), |
| 648 | LDAP_SCOPE_SUBTREE, |
| 649 | query.c_str(), |
| 650 | search_attributes(), |
| 651 | 0, |
| 652 | NULL, NULL, |
| 653 | &timeout_copy, |
| 654 | 100, &ptr))) |
| 655 | { |
| 656 | ptr=NULL; |
| 657 | } |
| 658 | } |
| 659 | } |
| 660 | |
| 661 | authldaprc_search_result(ldap_connection &conn, |
| 662 | int msgid, |
| 663 | bool all, |
| 664 | const struct timeval &timeout) |
| 665 | :authldaprc_search_attributes(std::vector<std::string>()), |
| 666 | ptr(NULL), finished(false) |
| 667 | { |
| 668 | while (1) |
| 669 | { |
| 670 | struct timeval timeout_copy=timeout; |
| 671 | |
| 672 | int rc=ldap_result(conn.connection, msgid, all ? 1:0, |
| 673 | &timeout_copy, |
| 674 | &ptr); |
| 675 | |
| 676 | switch (rc) |
| 677 | { |
| 678 | case -1: |
| 679 | DPRINTF("ldap_result() failed"); |
| 680 | ldap_msgfree(ptr); |
| 681 | ptr=NULL; |
| 682 | return; |
| 683 | case 0: |
| 684 | DPRINTF("ldap_result() timed out"); |
| 685 | ldap_msgfree(ptr); |
| 686 | ptr=NULL; |
| 687 | return; |
| 688 | case LDAP_RES_SEARCH_ENTRY: |
| 689 | break; /* deal with below */ |
| 690 | case LDAP_RES_SEARCH_RESULT: |
| 691 | if (ldap_parse_result(conn.connection, ptr, |
| 692 | &rc, |
| 693 | NULL, NULL, NULL, NULL, |
| 694 | 0) != LDAP_SUCCESS) |
| 695 | { |
| 696 | DPRINTF("ldap_parse_result failed"); |
| 697 | ldap_msgfree(ptr); |
| 698 | ptr=NULL; |
| 699 | return; |
| 700 | } |
| 701 | ldap_msgfree(ptr); |
| 702 | ptr=NULL; |
| 703 | if (rc != LDAP_SUCCESS) |
| 704 | { |
| 705 | DPRINTF("search failed: %s", |
| 706 | ldap_err2string(rc)); |
| 707 | return; |
| 708 | } |
| 709 | finished=true; |
| 710 | return; |
| 711 | default: |
| 712 | DPRINTF("ldap_result(): ignored 0x%02X status", |
| 713 | rc); |
| 714 | ldap_msgfree(ptr); |
| 715 | ptr=NULL; |
| 716 | continue; |
| 717 | } |
| 718 | break; |
| 719 | } |
| 720 | } |
| 721 | |
| 722 | bool operator!() const |
| 723 | { |
| 724 | return ptr == NULL; |
| 725 | } |
| 726 | |
| 727 | operator bool() const |
| 728 | { |
| 729 | return ptr != NULL; |
| 730 | } |
| 731 | |
| 732 | ~authldaprc_search_result() |
| 733 | { |
| 734 | if (ptr) |
| 735 | ldap_msgfree(ptr); |
| 736 | } |
| 737 | }; |
| 738 | |
| 739 | static std::vector<std::string> |
| 740 | authldap_entry_values(LDAP *connection, LDAPMessage *msg, |
| 741 | const std::string &attrname) |
| 742 | { |
| 743 | std::vector<std::string> values; |
| 744 | |
| 745 | struct berval **p=ldap_get_values_len(connection, msg, |
| 746 | attrname.c_str()); |
| 747 | |
| 748 | if (p) |
| 749 | { |
| 750 | |
| 751 | size_t n=ldap_count_values_len(p); |
| 752 | |
| 753 | values.reserve(n); |
| 754 | |
| 755 | for (size_t i=0; i<n; i++) |
| 756 | { |
| 757 | const char *ptr= |
| 758 | reinterpret_cast<const char *>(p[i]->bv_val); |
| 759 | |
| 760 | values.push_back(std::string(ptr, ptr+p[i]->bv_len)); |
| 761 | } |
| 762 | |
| 763 | ldap_value_free_len(p); |
| 764 | } |
| 765 | return values; |
| 766 | } |
| 767 | |
| 768 | class authldap_get_values { |
| 769 | |
| 770 | LDAP *connection; |
| 771 | LDAPMessage *entry; |
| 772 | std::string context; |
| 773 | |
| 774 | public: |
| 775 | |
| 776 | authldap_get_values(LDAP *connectionArg, |
| 777 | LDAPMessage *entryArg, |
| 778 | const std::string &contextArg) |
| 779 | : connection(connectionArg), |
| 780 | entry(entryArg), |
| 781 | context(contextArg) |
| 782 | { |
| 783 | } |
| 784 | |
| 785 | bool operator()(const std::string &attrname, |
| 786 | std::string &value) |
| 787 | { |
| 788 | std::vector<std::string> values= |
| 789 | authldap_entry_values(connection, entry, attrname); |
| 790 | |
| 791 | if (values.empty()) |
| 792 | return false; |
| 793 | |
| 794 | if (values.size() > 1) |
| 795 | { |
| 796 | fprintf(stderr, |
| 797 | "WARN: authldaplib: duplicate attribute %s for %s\n", |
| 798 | attrname.c_str(), |
| 799 | context.c_str()); |
| 800 | } |
| 801 | |
| 802 | value=values[0]; |
| 803 | return true; |
| 804 | } |
| 805 | |
| 806 | std::string options() |
| 807 | { |
| 808 | size_t i; |
| 809 | |
| 810 | std::ostringstream options; |
| 811 | const char *options_sep=""; |
| 812 | |
| 813 | for (i=0; i<authldaprc.auxoptions.size(); ++i) |
| 814 | { |
| 815 | std::string value; |
| 816 | |
| 817 | if (operator()(authldaprc.auxoptions[i], value) |
| 818 | && !value.empty()) |
| 819 | { |
| 820 | options << options_sep |
| 821 | << authldaprc.auxnames[i] |
| 822 | << "=" |
| 823 | << value; |
| 824 | options_sep=","; |
| 825 | } |
| 826 | } |
| 827 | return options.str(); |
| 828 | } |
| 829 | }; |
| 830 | |
| 831 | static void cpp_auth_ldap_enumerate( void(*cb_func)(const char *name, |
| 832 | uid_t uid, |
| 833 | gid_t gid, |
| 834 | const char *homedir, |
| 835 | const char *maildir, |
| 836 | const char *options, |
| 837 | void *void_arg), |
| 838 | void *void_arg) |
| 839 | { |
| 840 | int msgid; |
| 841 | |
| 842 | if (ldapopen()) |
| 843 | { |
| 844 | (*cb_func)(NULL, 0, 0, NULL, NULL, NULL, void_arg); |
| 845 | return; |
| 846 | } |
| 847 | |
| 848 | std::string mail_field, uid_field, gid_field, |
| 849 | homedir_field, maildir_field; |
| 850 | |
| 851 | authldaprc.config("LDAP_MAIL", mail_field, false, "mail"); |
| 852 | authldaprc.config("LDAP_UID", uid_field, false); |
| 853 | authldaprc.config("LDAP_GID", gid_field, false); |
| 854 | authldaprc.config("LDAP_HOMEDIR", homedir_field, false, "homeDir"); |
| 855 | authldaprc.config("LDAP_MAILDIR", maildir_field, false); |
| 856 | |
| 857 | std::vector<std::string> attribute_vector; |
| 858 | |
| 859 | attribute_vector.push_back(mail_field); |
| 860 | attribute_vector.push_back(uid_field); |
| 861 | attribute_vector.push_back(gid_field); |
| 862 | attribute_vector.push_back(homedir_field); |
| 863 | attribute_vector.push_back(maildir_field); |
| 864 | |
| 865 | for (size_t i=0; i<authldaprc.auxoptions.size(); i++) |
| 866 | { |
| 867 | attribute_vector.push_back(authldaprc.auxoptions[i]); |
| 868 | } |
| 869 | |
| 870 | std::string enumerate_filter; |
| 871 | |
| 872 | authldaprc.config("LDAP_ENUMERATE_FILTER", enumerate_filter, false); |
| 873 | |
| 874 | if (enumerate_filter.empty()) |
| 875 | { |
| 876 | std::string filter; |
| 877 | |
| 878 | authldaprc.config("LDAP_FILTER", filter, false); |
| 879 | |
| 880 | if (!filter.empty()) |
| 881 | { |
| 882 | enumerate_filter=filter; |
| 883 | } |
| 884 | else |
| 885 | { |
| 886 | std::string s; |
| 887 | |
| 888 | authldaprc.config("LDAP_MAIL", s, false); |
| 889 | |
| 890 | enumerate_filter = s + "=*"; |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | DPRINTF("ldap_search: basedn='%s', filter='%s'", |
| 895 | authldaprc.ldap_basedn.c_str(), enumerate_filter.c_str()); |
| 896 | |
| 897 | authldaprc_search_attributes search_attributes(attribute_vector); |
| 898 | |
| 899 | struct timeval tv; |
| 900 | tv.tv_sec=60*60; |
| 901 | tv.tv_usec=0; |
| 902 | |
| 903 | if (ldap_search_ext(main_connection.connection, |
| 904 | authldaprc.ldap_basedn.c_str(), |
| 905 | LDAP_SCOPE_SUBTREE, |
| 906 | enumerate_filter.c_str(), |
| 907 | search_attributes.search_attributes(), |
| 908 | 0, |
| 909 | NULL, NULL, &tv, 1000000, &msgid) < 0) |
| 910 | { |
| 911 | DPRINTF("ldap_search_ext failed"); |
| 912 | return; |
| 913 | } |
| 914 | |
| 915 | /* Process results */ |
| 916 | |
| 917 | while (1) |
| 918 | { |
| 919 | struct timeval timeout; |
| 920 | LDAPMessage *entry; |
| 921 | |
| 922 | timeout.tv_sec=authldaprc.timeout; |
| 923 | timeout.tv_usec=0; |
| 924 | |
| 925 | authldaprc_search_result search_result(main_connection, |
| 926 | msgid, |
| 927 | false, |
| 928 | timeout); |
| 929 | |
| 930 | if (search_result.finished) |
| 931 | break; |
| 932 | |
| 933 | if (!search_result) |
| 934 | return; |
| 935 | |
| 936 | entry = ldap_first_entry(main_connection.connection, search_result.ptr); |
| 937 | |
| 938 | while (entry) |
| 939 | { |
| 940 | std::vector<std::string> |
| 941 | names=authldap_entry_values(main_connection.connection, |
| 942 | entry, |
| 943 | mail_field); |
| 944 | |
| 945 | if (names.empty()) |
| 946 | { |
| 947 | entry = ldap_next_entry(main_connection.connection, entry); |
| 948 | continue; |
| 949 | } |
| 950 | |
| 951 | size_t n=names.size(); |
| 952 | |
| 953 | if (n > 0) |
| 954 | { |
| 955 | std::string uid_s, gid_s, homedir, maildir; |
| 956 | uid_t uid=authldaprc.uid; |
| 957 | gid_t gid=authldaprc.gid; |
| 958 | |
| 959 | authldap_get_values |
| 960 | get_value(main_connection.connection, entry, |
| 961 | names[0]); |
| 962 | |
| 963 | if (!uid_field.empty()) |
| 964 | get_value(uid_field, uid_s); |
| 965 | |
| 966 | if (!gid_field.empty()) |
| 967 | { |
| 968 | get_value(gid_field, gid_s); |
| 969 | } |
| 970 | |
| 971 | get_value(homedir_field, homedir); |
| 972 | get_value(maildir_field, maildir); |
| 973 | |
| 974 | if (!uid_s.empty()) |
| 975 | std::istringstream(uid_s) |
| 976 | >> uid; |
| 977 | |
| 978 | if (!gid_s.empty()) |
| 979 | std::istringstream(gid_s) |
| 980 | >> gid; |
| 981 | |
| 982 | std::string options=get_value.options(); |
| 983 | |
| 984 | for (size_t j=0; j < n; j++) |
| 985 | { |
| 986 | if (!homedir.empty()) |
| 987 | (*cb_func)(names[j].c_str(), |
| 988 | uid, gid, |
| 989 | homedir.c_str(), |
| 990 | maildir.empty() |
| 991 | ? 0:maildir.c_str(), |
| 992 | options.empty() |
| 993 | ? 0:options.c_str(), |
| 994 | void_arg); |
| 995 | } |
| 996 | } |
| 997 | |
| 998 | entry = ldap_next_entry(main_connection.connection, entry); |
| 999 | } |
| 1000 | } |
| 1001 | |
| 1002 | /* Success */ |
| 1003 | (*cb_func)(NULL, 0, 0, NULL, NULL, NULL, void_arg); |
| 1004 | } |
| 1005 | |
| 1006 | static void cpp_authldapclose() |
| 1007 | { |
| 1008 | main_connection.disconnect(); |
| 1009 | bind_connection.disconnect(); |
| 1010 | } |
| 1011 | |
| 1012 | class authldap_lookup : private authldaprc_attributes { |
| 1013 | |
| 1014 | struct authinfo auth; |
| 1015 | const char *service; |
| 1016 | std::string attrname; |
| 1017 | std::string user; |
| 1018 | const char *pass; |
| 1019 | const char *newpass; |
| 1020 | const char *authaddr; |
| 1021 | |
| 1022 | public: |
| 1023 | authldap_lookup(const char *serviceArg, |
| 1024 | const std::string &attrnameArg, |
| 1025 | const std::string &userArg, |
| 1026 | const char *passArg, |
| 1027 | const char *newpassArg, |
| 1028 | const char *authaddrArg); |
| 1029 | |
| 1030 | int operator()(int (*callback)(struct authinfo *, void *), void *arg); |
| 1031 | |
| 1032 | private: |
| 1033 | int verify_password(const std::string &dn); |
| 1034 | int verify_password_myself(const std::string &dn); |
| 1035 | int verify_password_authbind(const std::string &dn); |
| 1036 | }; |
| 1037 | |
| 1038 | authldap_lookup::authldap_lookup(const char *serviceArg, |
| 1039 | const std::string &attrnameArg, |
| 1040 | const std::string &userArg, |
| 1041 | const char *passArg, |
| 1042 | const char *newpassArg, |
| 1043 | const char *authaddrArg) |
| 1044 | : service(serviceArg), |
| 1045 | attrname(attrnameArg), |
| 1046 | user(userArg), |
| 1047 | pass(passArg), |
| 1048 | newpass(newpassArg), |
| 1049 | authaddr(authaddrArg) |
| 1050 | { |
| 1051 | } |
| 1052 | |
| 1053 | int authldap_lookup::operator()(int (*callback)(struct authinfo *, void *), |
| 1054 | void *arg) |
| 1055 | { |
| 1056 | struct timeval timeout; |
| 1057 | |
| 1058 | LDAPMessage *entry; |
| 1059 | |
| 1060 | std::string dn; |
| 1061 | |
| 1062 | std::string homeDir, mailDir, userPassword, |
| 1063 | cryptPassword, |
| 1064 | cn, |
| 1065 | uidNumber, |
| 1066 | gidNumber, quota; |
| 1067 | |
| 1068 | uid_t au; |
| 1069 | gid_t ag; |
| 1070 | int rc; |
| 1071 | |
| 1072 | std::ostringstream query; |
| 1073 | |
| 1074 | std::string filter; |
| 1075 | |
| 1076 | authldaprc.config("LDAP_FILTER", filter, false); |
| 1077 | |
| 1078 | if (!filter.empty()) |
| 1079 | { |
| 1080 | query << "(&" << filter; |
| 1081 | } |
| 1082 | |
| 1083 | query << "(" << attrname << "=" << user; |
| 1084 | |
| 1085 | std::string domain; |
| 1086 | |
| 1087 | authldaprc.config("LDAP_DOMAIN", domain, false); |
| 1088 | |
| 1089 | if (!domain.empty() && |
| 1090 | std::find(user.begin(), user.end(), '@') == user.end()) |
| 1091 | query << "@" << domain; |
| 1092 | query << ")"; |
| 1093 | |
| 1094 | if (!filter.empty()) |
| 1095 | query << ")"; |
| 1096 | |
| 1097 | std::string query_str=query.str(); |
| 1098 | |
| 1099 | DPRINTF("Query: %s", query_str.c_str()); |
| 1100 | |
| 1101 | timeout.tv_sec=authldaprc.timeout; |
| 1102 | timeout.tv_usec=0; |
| 1103 | |
| 1104 | attribute("LDAP_HOMEDIR", "homeDir", homeDir); |
| 1105 | attribute(service && strcmp(service, "courier") == 0 |
| 1106 | ? "LDAP_DEFAULTDELIVERY":"LDAP_MAILDIR", 0, mailDir); |
| 1107 | attribute("LDAP_FULLNAME", 0, cn); |
| 1108 | std::string clearpw_value=attribute("LDAP_CLEARPW", 0, userPassword); |
| 1109 | std::string cryptpw_value=attribute("LDAP_CRYPTPW", 0, cryptPassword); |
| 1110 | attribute("LDAP_UID", 0, uidNumber); |
| 1111 | attribute("LDAP_GID", 0, gidNumber); |
| 1112 | attribute("LDAP_MAILDIRQUOTA", 0, quota); |
| 1113 | |
| 1114 | authldaprc_attribute_vector all_attributes(attributes); |
| 1115 | |
| 1116 | for (size_t i=0; i<authldaprc.auxoptions.size(); i++) |
| 1117 | { |
| 1118 | all_attributes.push_back(authldaprc.auxoptions[i]); |
| 1119 | } |
| 1120 | |
| 1121 | authldaprc_search_result result(main_connection, |
| 1122 | authldaprc.ldap_basedn, |
| 1123 | query_str, |
| 1124 | all_attributes, |
| 1125 | timeout); |
| 1126 | |
| 1127 | int n_entries=ldap_count_entries(main_connection.connection, result.ptr); |
| 1128 | |
| 1129 | if (n_entries != 1) |
| 1130 | { |
| 1131 | if (n_entries == 0) |
| 1132 | { |
| 1133 | DPRINTF("Not found"); |
| 1134 | } |
| 1135 | else |
| 1136 | { |
| 1137 | DPRINTF("Returned multiple entries (%d)", n_entries); |
| 1138 | } |
| 1139 | return -1; |
| 1140 | } |
| 1141 | |
| 1142 | char *dn_p = ldap_get_dn(main_connection.connection, result.ptr); |
| 1143 | |
| 1144 | DPRINTF("Returned DN: %s", dn_p ? dn_p : "<null>"); |
| 1145 | |
| 1146 | if (dn_p == NULL) |
| 1147 | { |
| 1148 | DPRINTF("ldap_get_dn failed"); |
| 1149 | return -1; |
| 1150 | } |
| 1151 | |
| 1152 | dn=dn_p; |
| 1153 | free(dn_p); |
| 1154 | |
| 1155 | /* Get the pointer on this result */ |
| 1156 | entry=ldap_first_entry(main_connection.connection, result.ptr); |
| 1157 | if (entry==NULL) |
| 1158 | { |
| 1159 | DPRINTF("ldap_first_entry failed"); |
| 1160 | return -1; |
| 1161 | } |
| 1162 | |
| 1163 | /* print all the raw attributes */ |
| 1164 | if (courier_authdebug_login_level >= 2) |
| 1165 | { |
| 1166 | BerElement *berptr = 0; |
| 1167 | char *attr= |
| 1168 | ldap_first_attribute(main_connection.connection, entry, &berptr); |
| 1169 | |
| 1170 | while (attr) |
| 1171 | { |
| 1172 | std::vector<std::string> |
| 1173 | values=authldap_entry_values(main_connection.connection, |
| 1174 | entry, |
| 1175 | attr); |
| 1176 | for (size_t i=0; i<values.size(); ++i) |
| 1177 | DPRINTF(" %s: %s", attr, values[i].c_str()); |
| 1178 | |
| 1179 | ldap_memfree(attr); |
| 1180 | attr = ldap_next_attribute(main_connection.connection, entry, |
| 1181 | berptr); |
| 1182 | } |
| 1183 | |
| 1184 | ber_free(berptr, 0); |
| 1185 | } |
| 1186 | |
| 1187 | authldap_get_values get_value(main_connection.connection, entry, dn.c_str()); |
| 1188 | |
| 1189 | for (std::map<std::string, std::string *>::iterator |
| 1190 | p=attributes.begin(); p != attributes.end(); ++p) |
| 1191 | { |
| 1192 | get_value(p->first, *p->second); |
| 1193 | } |
| 1194 | |
| 1195 | au=authldaprc.uid; |
| 1196 | ag=authldaprc.gid; |
| 1197 | if (!uidNumber.empty()) |
| 1198 | { |
| 1199 | std::istringstream(uidNumber) >> au; |
| 1200 | } |
| 1201 | |
| 1202 | if (!gidNumber.empty()) |
| 1203 | { |
| 1204 | std::istringstream(gidNumber) >> ag; |
| 1205 | } |
| 1206 | |
| 1207 | std::string mailroot; |
| 1208 | |
| 1209 | authldaprc.config("LDAP_MAILROOT", mailroot, false); |
| 1210 | |
| 1211 | if (!homeDir.empty() && !mailroot.empty()) |
| 1212 | { |
| 1213 | homeDir = mailroot + "/" + homeDir; |
| 1214 | } |
| 1215 | |
| 1216 | std::string options=get_value.options(); |
| 1217 | |
| 1218 | memset(&auth, 0, sizeof(auth)); |
| 1219 | |
| 1220 | auth.sysuserid= &au; |
| 1221 | auth.sysgroupid= ag; |
| 1222 | auth.homedir=homeDir.c_str(); |
| 1223 | auth.address=authaddr; |
| 1224 | auth.fullname=cn.c_str(); |
| 1225 | |
| 1226 | if (!mailDir.empty()) |
| 1227 | auth.maildir=mailDir.c_str(); |
| 1228 | |
| 1229 | if (!userPassword.empty()) |
| 1230 | auth.clearpasswd=userPassword.c_str(); |
| 1231 | |
| 1232 | if (!cryptPassword.empty()) |
| 1233 | auth.passwd=cryptPassword.c_str(); |
| 1234 | |
| 1235 | if (!quota.empty()) |
| 1236 | auth.quota=quota.c_str(); |
| 1237 | |
| 1238 | if (!options.empty()) |
| 1239 | auth.options=options.c_str(); |
| 1240 | |
| 1241 | rc=0; |
| 1242 | |
| 1243 | if (au == 0 || ag == 0) |
| 1244 | { |
| 1245 | courier_auth_err("authldaplib: refuse to authenticate %s: uid=%d, gid=%d (zero uid or gid not permitted)", |
| 1246 | user.c_str(), au, ag); |
| 1247 | rc= 1; |
| 1248 | } |
| 1249 | |
| 1250 | courier_authdebug_authinfo("DEBUG: authldaplib: ", &auth, |
| 1251 | userPassword.c_str(), |
| 1252 | cryptPassword.c_str()); |
| 1253 | |
| 1254 | if (rc == 0) |
| 1255 | rc=verify_password(dn); |
| 1256 | |
| 1257 | std::string newpass_crypt; |
| 1258 | |
| 1259 | if (rc == 0 && newpass) |
| 1260 | { |
| 1261 | char *p=authcryptpasswd(newpass, auth.passwd); |
| 1262 | |
| 1263 | if (!p) |
| 1264 | rc=-1; |
| 1265 | else |
| 1266 | { |
| 1267 | newpass_crypt=p; |
| 1268 | free(p); |
| 1269 | } |
| 1270 | |
| 1271 | LDAPMod *mods[3]; |
| 1272 | int mod_index=0; |
| 1273 | |
| 1274 | LDAPMod mod_clear, mod_crypt; |
| 1275 | char *mod_clear_vals[2], *mod_crypt_vals[2]; |
| 1276 | |
| 1277 | std::vector<char> clearpw_buffer, cryptpw_buffer; |
| 1278 | |
| 1279 | if (!clearpw_value.empty() && auth.clearpasswd) |
| 1280 | { |
| 1281 | clearpw_buffer.insert(clearpw_buffer.end(), |
| 1282 | clearpw_value.begin(), |
| 1283 | clearpw_value.end()); |
| 1284 | |
| 1285 | clearpw_buffer.push_back(0); |
| 1286 | |
| 1287 | mods[mod_index]= &mod_clear; |
| 1288 | mod_clear.mod_op=LDAP_MOD_REPLACE; |
| 1289 | mod_clear.mod_type=&clearpw_buffer[0]; |
| 1290 | mod_clear.mod_values=mod_clear_vals; |
| 1291 | |
| 1292 | DPRINTF("Modify: %s", mod_clear.mod_type); |
| 1293 | |
| 1294 | mod_clear_vals[0]=(char *)newpass; |
| 1295 | mod_clear_vals[1]=NULL; |
| 1296 | ++mod_index; |
| 1297 | } |
| 1298 | |
| 1299 | if (!cryptpw_value.empty() && |
| 1300 | !newpass_crypt.empty() && auth.passwd) |
| 1301 | { |
| 1302 | cryptpw_buffer.insert(cryptpw_buffer.end(), |
| 1303 | cryptpw_value.begin(), |
| 1304 | cryptpw_value.end()); |
| 1305 | |
| 1306 | cryptpw_buffer.push_back(0); |
| 1307 | |
| 1308 | mods[mod_index]= &mod_crypt; |
| 1309 | mod_crypt.mod_op=LDAP_MOD_REPLACE; |
| 1310 | mod_crypt.mod_type=&cryptpw_buffer[0]; |
| 1311 | mod_crypt.mod_values=mod_crypt_vals; |
| 1312 | |
| 1313 | DPRINTF("Modify: %s", mod_crypt.mod_type); |
| 1314 | |
| 1315 | newpass_crypt.push_back(0); |
| 1316 | mod_crypt_vals[0]=&newpass_crypt[0]; |
| 1317 | mod_crypt_vals[1]=NULL; |
| 1318 | ++mod_index; |
| 1319 | } |
| 1320 | if (mod_index == 0) |
| 1321 | rc= -1; |
| 1322 | else |
| 1323 | { |
| 1324 | mods[mod_index]=0; |
| 1325 | |
| 1326 | /* |
| 1327 | ** Use the user connection for updating the password. |
| 1328 | */ |
| 1329 | |
| 1330 | int ld_errno= |
| 1331 | ldap_modify_ext_s(bind_connection.connected() |
| 1332 | ? bind_connection.connection |
| 1333 | : main_connection.connection, |
| 1334 | dn.c_str(), mods, |
| 1335 | NULL, NULL); |
| 1336 | |
| 1337 | if (ld_errno != LDAP_SUCCESS) |
| 1338 | { |
| 1339 | rc= -1; |
| 1340 | DPRINTF("Password update failed: %s", |
| 1341 | ldap_err2string(ld_errno)); |
| 1342 | } |
| 1343 | } |
| 1344 | } |
| 1345 | |
| 1346 | if (rc == 0 && callback) |
| 1347 | { |
| 1348 | if (!auth.clearpasswd) |
| 1349 | auth.clearpasswd=pass; |
| 1350 | rc= (*callback)(&auth, arg); |
| 1351 | } |
| 1352 | |
| 1353 | return (rc); |
| 1354 | } |
| 1355 | |
| 1356 | int authldap_lookup::verify_password(const std::string &dn) |
| 1357 | { |
| 1358 | if (!pass) |
| 1359 | return 0; |
| 1360 | |
| 1361 | if (authldaprc.authbind) |
| 1362 | return verify_password_authbind(dn); |
| 1363 | |
| 1364 | return verify_password_myself(dn); |
| 1365 | } |
| 1366 | |
| 1367 | int authldap_lookup::verify_password_authbind(const std::string &dn) |
| 1368 | { |
| 1369 | if (!bind_connection.connect()) |
| 1370 | return 1; |
| 1371 | |
| 1372 | if (!bind_connection.bind(dn, pass)) |
| 1373 | { |
| 1374 | bind_connection.close(); |
| 1375 | return 1; |
| 1376 | } |
| 1377 | |
| 1378 | if (authldaprc.protocol_version == 2) |
| 1379 | { |
| 1380 | // protocol version 2 does not allow rebinds. |
| 1381 | |
| 1382 | bind_connection.close(); |
| 1383 | } |
| 1384 | |
| 1385 | return 0; |
| 1386 | } |
| 1387 | |
| 1388 | int authldap_lookup::verify_password_myself(const std::string &dn) |
| 1389 | { |
| 1390 | if (auth.clearpasswd) |
| 1391 | { |
| 1392 | if (strcmp(pass, auth.clearpasswd)) |
| 1393 | { |
| 1394 | if (courier_authdebug_login_level >= 2) |
| 1395 | { |
| 1396 | DPRINTF("Password for %s: '%s' does not match clearpasswd '%s'", |
| 1397 | dn.c_str(), pass, auth.clearpasswd); |
| 1398 | } |
| 1399 | else |
| 1400 | { |
| 1401 | DPRINTF("Password for %s does not match", |
| 1402 | dn.c_str()); |
| 1403 | } |
| 1404 | return -1; |
| 1405 | } |
| 1406 | } |
| 1407 | else |
| 1408 | { |
| 1409 | const char *p=auth.passwd; |
| 1410 | |
| 1411 | if (!p) |
| 1412 | { |
| 1413 | DPRINTF("Missing password in LDAP!"); |
| 1414 | return -1; |
| 1415 | } |
| 1416 | |
| 1417 | if (authcheckpassword(pass, p)) |
| 1418 | { |
| 1419 | DPRINTF("Password for %s does not match", |
| 1420 | dn.c_str()); |
| 1421 | return -1; |
| 1422 | } |
| 1423 | } |
| 1424 | |
| 1425 | return 0; |
| 1426 | } |
| 1427 | |
| 1428 | /* |
| 1429 | ** Replace keywords in the emailmap string. |
| 1430 | */ |
| 1431 | |
| 1432 | static std::string emailmap_replace(const char *str, |
| 1433 | const std::string &user_value, |
| 1434 | const std::string &realm_value) |
| 1435 | { |
| 1436 | std::ostringstream o; |
| 1437 | |
| 1438 | while (*str) |
| 1439 | { |
| 1440 | const char *p=str; |
| 1441 | |
| 1442 | while (*str && *str != '@') |
| 1443 | ++str; |
| 1444 | |
| 1445 | o << std::string(p, str); |
| 1446 | |
| 1447 | if (*str != '@') |
| 1448 | continue; |
| 1449 | |
| 1450 | ++str; |
| 1451 | |
| 1452 | p=str; |
| 1453 | while (*str && *str != '@') |
| 1454 | ++str; |
| 1455 | |
| 1456 | std::string key(p, str); |
| 1457 | |
| 1458 | if (*str) |
| 1459 | ++str; |
| 1460 | |
| 1461 | if (key == "user") |
| 1462 | o << user_value; |
| 1463 | else if (key == "realm") |
| 1464 | o << realm_value; |
| 1465 | } |
| 1466 | |
| 1467 | return o.str(); |
| 1468 | } |
| 1469 | |
| 1470 | static int auth_ldap_try(const char *service, |
| 1471 | const char *unquoted_user, const char *pass, |
| 1472 | int (*callback)(struct authinfo *, void *), |
| 1473 | void *arg, const char *newpass) |
| 1474 | { |
| 1475 | std::string user; |
| 1476 | |
| 1477 | { |
| 1478 | char *q=courier_auth_ldap_escape(unquoted_user); |
| 1479 | |
| 1480 | user=q; |
| 1481 | free(q); |
| 1482 | } |
| 1483 | |
| 1484 | if (ldapopen()) return (-1); |
| 1485 | |
| 1486 | std::string::iterator at=std::find(user.begin(), user.end(), '@'); |
| 1487 | |
| 1488 | std::string emailmap; |
| 1489 | |
| 1490 | authldaprc.config("LDAP_EMAILMAP", emailmap, false); |
| 1491 | |
| 1492 | std::string mail; |
| 1493 | |
| 1494 | if (!authldaprc.config("LDAP_MAIL", mail, false, "mail")) |
| 1495 | return -1; |
| 1496 | |
| 1497 | if (emailmap.empty() || at == user.end()) |
| 1498 | { |
| 1499 | authldap_lookup real_lookup(service, mail, user, pass, |
| 1500 | newpass, user.c_str()); |
| 1501 | |
| 1502 | return real_lookup(callback, arg); |
| 1503 | } |
| 1504 | |
| 1505 | std::string user_value(user.begin(), at); |
| 1506 | std::string realm_value(++at, user.end()); |
| 1507 | |
| 1508 | std::string query= |
| 1509 | emailmap_replace(emailmap.c_str(), user_value, realm_value); |
| 1510 | |
| 1511 | DPRINTF("using emailmap search: %s", query.c_str()); |
| 1512 | |
| 1513 | struct timeval tv; |
| 1514 | |
| 1515 | tv.tv_sec=authldaprc.timeout; |
| 1516 | tv.tv_usec=0; |
| 1517 | |
| 1518 | std::vector<std::string> attributes; |
| 1519 | |
| 1520 | attributes.push_back(""); |
| 1521 | |
| 1522 | authldaprc.config("LDAP_EMAILMAP_ATTRIBUTE", attributes[0], false); |
| 1523 | |
| 1524 | if (attributes[0].empty()) |
| 1525 | attributes[0]="handle"; |
| 1526 | |
| 1527 | std::string basedn; |
| 1528 | |
| 1529 | if (!authldaprc.config("LDAP_EMAILMAP_BASEDN", basedn, true)) |
| 1530 | return -1; |
| 1531 | |
| 1532 | authldaprc_search_result |
| 1533 | lookup(main_connection, |
| 1534 | basedn, |
| 1535 | query, |
| 1536 | attributes, |
| 1537 | tv); |
| 1538 | |
| 1539 | if (!lookup) |
| 1540 | { |
| 1541 | if (main_connection.connection) return (-1); |
| 1542 | return (1); |
| 1543 | } |
| 1544 | |
| 1545 | int cnt=ldap_count_entries(main_connection.connection, lookup.ptr); |
| 1546 | |
| 1547 | if (cnt != 1) |
| 1548 | { |
| 1549 | courier_auth_err("emailmap: %d entries returned from search %s (but we need exactly 1)", |
| 1550 | cnt, query.c_str()); |
| 1551 | return -1; |
| 1552 | } |
| 1553 | |
| 1554 | LDAPMessage *entry=ldap_first_entry(main_connection.connection, lookup.ptr); |
| 1555 | |
| 1556 | if (!entry) |
| 1557 | { |
| 1558 | courier_auth_err("authldap: unexpected NULL from ldap_first_entry"); |
| 1559 | return -1; |
| 1560 | } |
| 1561 | |
| 1562 | authldap_get_values get_value(main_connection.connection, entry, query); |
| 1563 | |
| 1564 | std::string v; |
| 1565 | |
| 1566 | get_value(attributes[0], v); |
| 1567 | |
| 1568 | if (v.empty()) |
| 1569 | { |
| 1570 | DPRINTF("emailmap: empty attribute"); |
| 1571 | return (-1); |
| 1572 | } |
| 1573 | |
| 1574 | |
| 1575 | std::string attrname; |
| 1576 | |
| 1577 | authldaprc.config("LDAP_EMAILMAP_MAIL", attrname, false); |
| 1578 | |
| 1579 | if (attrname.empty()) |
| 1580 | { |
| 1581 | attrname=mail; |
| 1582 | } |
| 1583 | |
| 1584 | DPRINTF("emailmap: attribute=%s, value=%s", attrname.c_str(), |
| 1585 | v.c_str()); |
| 1586 | |
| 1587 | authldap_lookup real_lookup(service, attrname, v.c_str(), pass, |
| 1588 | newpass, user.c_str()); |
| 1589 | |
| 1590 | return real_lookup(callback, arg); |
| 1591 | } |
| 1592 | |
| 1593 | // Try the query once. If there's a connection-level error, try again. |
| 1594 | |
| 1595 | static int auth_ldap_retry(const char *service, |
| 1596 | const char *unquoted_user, |
| 1597 | const char *pass, |
| 1598 | int (*callback)(struct authinfo *, void *), |
| 1599 | void *arg, const char *newpass) |
| 1600 | { |
| 1601 | int rc=auth_ldap_try(service, unquoted_user, pass, callback, arg, |
| 1602 | newpass); |
| 1603 | |
| 1604 | if (rc > 0) |
| 1605 | rc=auth_ldap_try(service, unquoted_user, pass, callback, arg, |
| 1606 | newpass); |
| 1607 | |
| 1608 | return rc; |
| 1609 | } |
| 1610 | |
| 1611 | extern "C" { |
| 1612 | |
| 1613 | #if 0 |
| 1614 | }; |
| 1615 | #endif |
| 1616 | |
| 1617 | int auth_ldap_changepw(const char *dummy, const char *user, |
| 1618 | const char *pass, |
| 1619 | const char *newpass) |
| 1620 | { |
| 1621 | if (!authldaprc.load()) |
| 1622 | return 1; |
| 1623 | |
| 1624 | return auth_ldap_retry("authlib", user, pass, NULL, NULL, newpass); |
| 1625 | } |
| 1626 | |
| 1627 | int authldapcommon(const char *service, |
| 1628 | const char *user, const char *pass, |
| 1629 | int (*callback)(struct authinfo *, void *), |
| 1630 | void *arg) |
| 1631 | { |
| 1632 | if (!authldaprc.load()) |
| 1633 | return 1; |
| 1634 | return (auth_ldap_retry(service, user, pass, callback, arg, NULL)); |
| 1635 | } |
| 1636 | |
| 1637 | void authldapclose() |
| 1638 | { |
| 1639 | cpp_authldapclose(); |
| 1640 | } |
| 1641 | |
| 1642 | void auth_ldap_enumerate( void(*cb_func)(const char *name, |
| 1643 | uid_t uid, |
| 1644 | gid_t gid, |
| 1645 | const char *homedir, |
| 1646 | const char *maildir, |
| 1647 | const char *options, |
| 1648 | void *void_arg), |
| 1649 | void *void_arg) |
| 1650 | { |
| 1651 | if (!authldaprc.load()) |
| 1652 | return; |
| 1653 | |
| 1654 | cpp_auth_ldap_enumerate(cb_func, void_arg); |
| 1655 | } |
| 1656 | |
| 1657 | #if 0 |
| 1658 | { |
| 1659 | #endif |
| 1660 | } |