| 1 | /* |
| 2 | ** Copyright 2016 Double Precision, Inc. See COPYING for |
| 3 | ** distribution information. |
| 4 | */ |
| 5 | |
| 6 | #include <stdio.h> |
| 7 | #include <stdlib.h> |
| 8 | #include <string.h> |
| 9 | #include <unistd.h> |
| 10 | #include <ctype.h> |
| 11 | #include <sys/types.h> |
| 12 | #include <sys/stat.h> |
| 13 | #include <time.h> |
| 14 | |
| 15 | extern "C" { |
| 16 | #include "authsqliterc.h" |
| 17 | #include "auth.h" |
| 18 | #include "courierauthdebug.h" |
| 19 | } |
| 20 | |
| 21 | #include <string> |
| 22 | #include <sstream> |
| 23 | #include "authsqlite.h" |
| 24 | #include "authconfigfile.h" |
| 25 | |
| 26 | #define err courier_auth_err |
| 27 | |
| 28 | #define GET(c) ((c) < (n) && columns[(c)] ? columns[(c)]:"") |
| 29 | |
| 30 | class authsqlite_connection { |
| 31 | |
| 32 | public: |
| 33 | sqlite3 *dbh; |
| 34 | |
| 35 | class authsqliterc_vars { |
| 36 | public: |
| 37 | std::string database; |
| 38 | std::string select_clause, defdomain; |
| 39 | std::string user_table, crypt_field, clear_field, |
| 40 | name_field, uid_field, gid_field, login_field, |
| 41 | home_field, maildir_field, defaultdelivery_field, |
| 42 | quota_field, options_field, |
| 43 | where_clause, chpass_clause, enumerate_clause; |
| 44 | |
| 45 | }; |
| 46 | |
| 47 | class authsqliterc_file : public courier::auth::config_file, |
| 48 | public authsqliterc_vars { |
| 49 | |
| 50 | authsqlite_connection &conn; |
| 51 | |
| 52 | public: |
| 53 | |
| 54 | authsqliterc_file &operator=(const authsqliterc_file &o); |
| 55 | authsqliterc_file(authsqlite_connection &connArg); |
| 56 | ~authsqliterc_file(); |
| 57 | |
| 58 | bool do_load(); |
| 59 | void do_reload(); |
| 60 | }; |
| 61 | |
| 62 | authsqliterc_file config_file; |
| 63 | |
| 64 | authsqlite_connection() : dbh(NULL), config_file(*this) |
| 65 | { |
| 66 | } |
| 67 | |
| 68 | ~authsqlite_connection() |
| 69 | { |
| 70 | disconnect(); |
| 71 | } |
| 72 | |
| 73 | void disconnect() |
| 74 | { |
| 75 | if (dbh) |
| 76 | { |
| 77 | sqlite3_close(dbh); |
| 78 | dbh=NULL; |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | std::string escape(const std::string &s); |
| 83 | |
| 84 | sqlite3 *do_connect(); |
| 85 | |
| 86 | static authsqlite_connection *singleton; |
| 87 | |
| 88 | static authsqlite_connection *connect(); |
| 89 | |
| 90 | bool getuserinfo(const char *username, |
| 91 | const char *service, |
| 92 | authsqliteuserinfo &ui); |
| 93 | |
| 94 | void enumerate( void(*cb_func)(const char *name, |
| 95 | uid_t uid, |
| 96 | gid_t gid, |
| 97 | const char *homedir, |
| 98 | const char *maildir, |
| 99 | const char *options, |
| 100 | void *void_arg), |
| 101 | void *void_arg); |
| 102 | |
| 103 | bool setpass(const char *user, const char *pass, |
| 104 | const char *oldpass); |
| 105 | }; |
| 106 | |
| 107 | |
| 108 | authsqlite_connection::authsqliterc_file |
| 109 | &authsqlite_connection::authsqliterc_file |
| 110 | ::operator=(const authsqlite_connection::authsqliterc_file &o) |
| 111 | { |
| 112 | courier::auth::config_file::operator=(o); |
| 113 | authsqliterc_vars::operator=(o); |
| 114 | return *this; |
| 115 | } |
| 116 | |
| 117 | authsqlite_connection::authsqliterc_file |
| 118 | ::authsqliterc_file(authsqlite_connection &connArg) |
| 119 | : courier::auth::config_file(AUTHSQLITERC), |
| 120 | conn(connArg) |
| 121 | { |
| 122 | } |
| 123 | |
| 124 | authsqlite_connection::authsqliterc_file::~authsqliterc_file() |
| 125 | { |
| 126 | } |
| 127 | |
| 128 | bool authsqlite_connection::authsqliterc_file::do_load() |
| 129 | { |
| 130 | if (!config("SQLITE_DATABASE", database, true)) |
| 131 | return false; |
| 132 | |
| 133 | defdomain=config("DEFAULT_DOMAIN"); |
| 134 | |
| 135 | select_clause=config("SQLITE_SELECT_CLAUSE"); |
| 136 | chpass_clause=config("SQLITE_CHPASS_CLAUSE"); |
| 137 | enumerate_clause=config("SQLITE_ENUMERATE_CLAUSE"); |
| 138 | |
| 139 | if (select_clause.empty() || chpass_clause.empty() || |
| 140 | enumerate_clause.empty()) |
| 141 | { |
| 142 | if (!config("SQLITE_USER_TABLE", user_table, |
| 143 | true)) |
| 144 | return false; |
| 145 | |
| 146 | crypt_field=config("SQLITE_CRYPT_PWFIELD", "''"); |
| 147 | |
| 148 | clear_field=config("SQLITE_CLEAR_PWFIELD", "''"); |
| 149 | |
| 150 | if (crypt_field + clear_field == "''''") |
| 151 | { |
| 152 | err("SQLITE_CLEAR_PWFIELD and SQLITE_CLEAR_FIELD not set in " AUTHSQLITERC); |
| 153 | return false; |
| 154 | } |
| 155 | |
| 156 | name_field=config("SQLITE_NAME_FIELD", "''"); |
| 157 | |
| 158 | uid_field=config("SQLITE_UID_FIELD", "uid"); |
| 159 | gid_field=config("SQLITE_GID_FIELD", "gid"); |
| 160 | login_field=config("SQLITE_LOGIN_FIELD", "id"); |
| 161 | home_field=config("SQLITE_HOME_FIELD", "home"); |
| 162 | |
| 163 | maildir_field=config("SQLITE_MAILDIR_FIELD", "''"); |
| 164 | defaultdelivery_field=config("SQLITE_DEFAULTDELIVERY", "''"); |
| 165 | |
| 166 | quota_field=config("SQLITE_QUOTA_FIELD", "''"); |
| 167 | options_field=config("SQLITE_AUXOPTIONS_FIELD", "''"); |
| 168 | where_clause=config("SQLITE_WHERE_CLAUSE", "1=1"); |
| 169 | } |
| 170 | |
| 171 | return true; |
| 172 | } |
| 173 | |
| 174 | void authsqlite_connection::authsqliterc_file::do_reload() |
| 175 | { |
| 176 | authsqliterc_file new_file(conn); |
| 177 | |
| 178 | if (new_file.load(true)) |
| 179 | { |
| 180 | *this=new_file; |
| 181 | DPRINTF("authsqlite: reloaded %s", filename); |
| 182 | |
| 183 | // Disconnect from the server, new login |
| 184 | // parameters, perhaps. |
| 185 | |
| 186 | conn.disconnect(); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | authsqlite_connection *authsqlite_connection::singleton=NULL; |
| 191 | |
| 192 | authsqlite_connection *authsqlite_connection::connect() |
| 193 | { |
| 194 | if (authsqlite_connection::singleton) |
| 195 | { |
| 196 | authsqlite_connection::singleton->config_file.load(true); |
| 197 | return authsqlite_connection::singleton; |
| 198 | } |
| 199 | |
| 200 | authsqlite_connection *new_conn=new authsqlite_connection; |
| 201 | |
| 202 | if (new_conn->config_file.load()) |
| 203 | { |
| 204 | authsqlite_connection::singleton=new_conn; |
| 205 | return new_conn; |
| 206 | } |
| 207 | |
| 208 | delete new_conn; |
| 209 | return NULL; |
| 210 | } |
| 211 | |
| 212 | sqlite3 *authsqlite_connection::do_connect() |
| 213 | { |
| 214 | const char *p; |
| 215 | |
| 216 | if (dbh) |
| 217 | return dbh; |
| 218 | |
| 219 | p=config_file.database.c_str(); |
| 220 | |
| 221 | if (sqlite3_open_v2(p, &dbh, SQLITE_OPEN_READWRITE, NULL) != SQLITE_OK) |
| 222 | { |
| 223 | if (dbh) |
| 224 | { |
| 225 | err("sqllite3_open(%s): %s", p, sqlite3_errmsg(dbh)); |
| 226 | sqlite3_close(dbh); |
| 227 | dbh=0; |
| 228 | } |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | return dbh; |
| 233 | } |
| 234 | |
| 235 | static void do_auth_sqlite_cleanup() |
| 236 | { |
| 237 | if (authsqlite_connection::singleton) |
| 238 | { |
| 239 | delete authsqlite_connection::singleton; |
| 240 | authsqlite_connection::singleton=NULL; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | std::string authsqlite_connection::escape(const std::string &s) |
| 245 | { |
| 246 | char *q=sqlite3_mprintf("%q", s.c_str()); |
| 247 | |
| 248 | std::string r(q); |
| 249 | sqlite3_free(q); |
| 250 | return r; |
| 251 | } |
| 252 | |
| 253 | |
| 254 | class select_callback_info { |
| 255 | public: |
| 256 | authsqliteuserinfo &ui; |
| 257 | int ui_cnt; |
| 258 | |
| 259 | select_callback_info(authsqliteuserinfo &uiArg) |
| 260 | : ui(uiArg), ui_cnt(0) |
| 261 | { |
| 262 | } |
| 263 | }; |
| 264 | |
| 265 | static int select_callback(void *dummy, int n, char **columns, char **names) |
| 266 | { |
| 267 | select_callback_info *cb= |
| 268 | reinterpret_cast<select_callback_info *>(dummy); |
| 269 | |
| 270 | if (cb->ui_cnt++) |
| 271 | { |
| 272 | err("Multiple rows returned"); |
| 273 | return -1; |
| 274 | } |
| 275 | |
| 276 | if (n < 6) |
| 277 | { |
| 278 | err("Query came back with fewer than 6 columns"); |
| 279 | return -1; |
| 280 | } |
| 281 | |
| 282 | cb->ui.username=GET(0); |
| 283 | cb->ui.cryptpw=GET(1); |
| 284 | cb->ui.clearpw=GET(2); |
| 285 | cb->ui.home=GET(5); |
| 286 | cb->ui.maildir=GET(6); |
| 287 | cb->ui.quota=GET(7); |
| 288 | cb->ui.fullname=GET(8); |
| 289 | cb->ui.options=GET(9); |
| 290 | |
| 291 | std::istringstream(GET(3)) >> cb->ui.uid; |
| 292 | std::istringstream(GET(4)) >> cb->ui.gid; |
| 293 | return 0; |
| 294 | } |
| 295 | |
| 296 | bool authsqlite_connection::getuserinfo(const char *username, |
| 297 | const char *service, |
| 298 | authsqliteuserinfo &ui) |
| 299 | { |
| 300 | char *errmsg; |
| 301 | |
| 302 | if (!do_connect()) |
| 303 | return false; |
| 304 | |
| 305 | std::string querybuf; |
| 306 | |
| 307 | if (config_file.select_clause.empty()) |
| 308 | { |
| 309 | std::ostringstream o; |
| 310 | |
| 311 | o << "SELECT " |
| 312 | << config_file.login_field << ", " |
| 313 | << config_file.crypt_field << ", " |
| 314 | << config_file.clear_field << ", " |
| 315 | << config_file.uid_field << ", " |
| 316 | << config_file.gid_field << ", " |
| 317 | << config_file.home_field << ", " |
| 318 | << (strcmp(service, "courier") == 0 ? |
| 319 | config_file.defaultdelivery_field: |
| 320 | config_file.maildir_field) << ", " |
| 321 | << config_file.quota_field << ", " |
| 322 | << config_file.name_field << ", " |
| 323 | << config_file.options_field |
| 324 | << " FROM " << config_file.user_table |
| 325 | << " WHERE " << config_file.login_field |
| 326 | << " = '" << escape(username); |
| 327 | |
| 328 | if (strchr(username, '@') == NULL && |
| 329 | !config_file.defdomain.empty()) |
| 330 | { |
| 331 | o << "@" << config_file.defdomain; |
| 332 | } |
| 333 | |
| 334 | o << "' AND (" << config_file.where_clause << ")"; |
| 335 | |
| 336 | querybuf=o.str(); |
| 337 | } |
| 338 | else |
| 339 | { |
| 340 | std::map<std::string, std::string> parameters; |
| 341 | |
| 342 | parameters["service"]=service; |
| 343 | |
| 344 | querybuf=config_file |
| 345 | .parse_custom_query(config_file.select_clause, |
| 346 | escape(username), |
| 347 | config_file.defdomain, |
| 348 | parameters); |
| 349 | } |
| 350 | |
| 351 | DPRINTF("SQL query: %s", querybuf.c_str()); |
| 352 | errmsg=0; |
| 353 | |
| 354 | select_callback_info info(ui); |
| 355 | if (sqlite3_exec(dbh, querybuf.c_str(), select_callback, |
| 356 | reinterpret_cast<void *>(&info), &errmsg) != SQLITE_OK) |
| 357 | { |
| 358 | if (errmsg) |
| 359 | { |
| 360 | err(errmsg); |
| 361 | sqlite3_free(errmsg); |
| 362 | } |
| 363 | return false; |
| 364 | } |
| 365 | |
| 366 | if (errmsg) |
| 367 | { |
| 368 | err(errmsg); |
| 369 | sqlite3_free(errmsg); |
| 370 | } |
| 371 | |
| 372 | return true; |
| 373 | } |
| 374 | |
| 375 | static int dummy_callback(void *dummy, int n, char **columns, char **names) |
| 376 | { |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | bool authsqlite_connection::setpass(const char *user, const char *pass, |
| 381 | const char *oldpass) |
| 382 | { |
| 383 | char *errmsg; |
| 384 | bool rc=true; |
| 385 | |
| 386 | if (!do_connect()) return false; |
| 387 | |
| 388 | std::string newpass_crypt; |
| 389 | |
| 390 | { |
| 391 | char *p; |
| 392 | |
| 393 | if (!(p=authcryptpasswd(pass, oldpass))) |
| 394 | return false; |
| 395 | |
| 396 | newpass_crypt=p; |
| 397 | free(p); |
| 398 | } |
| 399 | |
| 400 | std::string clear_escaped=escape(pass); |
| 401 | |
| 402 | std::string crypt_escaped=escape(newpass_crypt); |
| 403 | |
| 404 | std::string sql_buf; |
| 405 | |
| 406 | if (config_file.chpass_clause.size() == 0) |
| 407 | { |
| 408 | std::string username_escaped=escape(user); |
| 409 | |
| 410 | bool has_domain=strchr(user, '@') != NULL; |
| 411 | |
| 412 | std::ostringstream o; |
| 413 | |
| 414 | o << "UPDATE " << config_file.user_table << " SET "; |
| 415 | |
| 416 | if (config_file.clear_field != "''") |
| 417 | o << config_file.clear_field << "='" |
| 418 | << clear_escaped << "'"; |
| 419 | |
| 420 | if (config_file.crypt_field != "''") |
| 421 | { |
| 422 | if (config_file.clear_field != "''") o << ", "; |
| 423 | o << config_file.crypt_field << "='" << crypt_escaped << "'"; |
| 424 | } |
| 425 | |
| 426 | o << " WHERE " << config_file.login_field << "='" |
| 427 | << username_escaped; |
| 428 | |
| 429 | if (!has_domain && config_file.defdomain.size()) |
| 430 | o << "@" << config_file.defdomain; |
| 431 | o << "'"; |
| 432 | |
| 433 | sql_buf=o.str(); |
| 434 | } |
| 435 | else |
| 436 | { |
| 437 | std::map<std::string, std::string> parameters; |
| 438 | |
| 439 | parameters["newpass"]=clear_escaped; |
| 440 | parameters["newpass_crypt"]=crypt_escaped; |
| 441 | |
| 442 | sql_buf=config_file |
| 443 | .parse_custom_query(config_file.chpass_clause, |
| 444 | user, |
| 445 | config_file.defdomain, |
| 446 | parameters); |
| 447 | } |
| 448 | |
| 449 | if (courier_authdebug_login_level >= 2) |
| 450 | { |
| 451 | DPRINTF("setpass SQL: %s", sql_buf.c_str()); |
| 452 | } |
| 453 | |
| 454 | errmsg=NULL; |
| 455 | |
| 456 | if (sqlite3_exec(dbh, sql_buf.c_str(), dummy_callback, |
| 457 | NULL, &errmsg) != SQLITE_OK) |
| 458 | { |
| 459 | rc=false; |
| 460 | } |
| 461 | else |
| 462 | { |
| 463 | if (sqlite3_changes(dbh) > 0) |
| 464 | { |
| 465 | DPRINTF("authsqllite: password updated"); |
| 466 | } |
| 467 | else |
| 468 | { |
| 469 | rc=false; |
| 470 | DPRINTF("authsqllite: password not updated"); |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | if (errmsg) |
| 475 | { |
| 476 | err(errmsg); |
| 477 | sqlite3_free(errmsg); |
| 478 | } |
| 479 | |
| 480 | return (rc); |
| 481 | } |
| 482 | |
| 483 | struct enumerate_user_cb { |
| 484 | |
| 485 | void (*cb_func)(const char *name, |
| 486 | uid_t uid, |
| 487 | gid_t gid, |
| 488 | const char *homedir, |
| 489 | const char *maildir, |
| 490 | const char *options, |
| 491 | void *void_arg); |
| 492 | void *void_arg; |
| 493 | }; |
| 494 | |
| 495 | static int enumerate_callback(void *closure, |
| 496 | int n, char **columns, char **names) |
| 497 | { |
| 498 | struct enumerate_user_cb *cb=(struct enumerate_user_cb *)closure; |
| 499 | |
| 500 | const char *username; |
| 501 | uid_t uid; |
| 502 | gid_t gid; |
| 503 | const char *homedir; |
| 504 | const char *maildir; |
| 505 | const char *options; |
| 506 | |
| 507 | username=GET(0); |
| 508 | uid=atol(GET(1)); /* FIXME use strtol to validate */ |
| 509 | gid=atol(GET(2)); |
| 510 | homedir=GET(3); |
| 511 | maildir=GET(4); |
| 512 | options=GET(5); |
| 513 | |
| 514 | if (maildir && !*maildir) |
| 515 | maildir=NULL; |
| 516 | |
| 517 | if (options && !*options) |
| 518 | options=NULL; |
| 519 | |
| 520 | (*cb->cb_func)(username, uid, gid, homedir, |
| 521 | maildir, options, cb->void_arg); |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | void authsqlite_connection::enumerate( void(*cb_func)(const char *name, |
| 526 | uid_t uid, |
| 527 | gid_t gid, |
| 528 | const char *homedir, |
| 529 | const char *maildir, |
| 530 | const char *options, |
| 531 | void *void_arg), |
| 532 | void *void_arg) |
| 533 | { |
| 534 | char *errmsg; |
| 535 | struct enumerate_user_cb cb; |
| 536 | std::string querybuf; |
| 537 | |
| 538 | cb.cb_func=cb_func; |
| 539 | cb.void_arg=void_arg; |
| 540 | |
| 541 | if (!do_connect()) return; |
| 542 | |
| 543 | if (config_file.enumerate_clause.empty()) |
| 544 | { |
| 545 | std::ostringstream o; |
| 546 | |
| 547 | o << "SELECT " |
| 548 | << config_file.login_field << ", " |
| 549 | << config_file.uid_field << ", " |
| 550 | << config_file.gid_field << ", " |
| 551 | << config_file.home_field << ", " |
| 552 | << config_file.maildir_field << ", " |
| 553 | << config_file.options_field |
| 554 | << " FROM " << config_file.user_table |
| 555 | << " WHERE " << config_file.where_clause; |
| 556 | |
| 557 | querybuf=o.str(); |
| 558 | } |
| 559 | else |
| 560 | { |
| 561 | std::map<std::string, std::string> parameters; |
| 562 | |
| 563 | parameters["service"]="enumerate"; |
| 564 | querybuf=config_file |
| 565 | .parse_custom_query(config_file.enumerate_clause, "*", |
| 566 | config_file.defdomain, parameters); |
| 567 | } |
| 568 | |
| 569 | DPRINTF("authsqlite: enumerate query: %s", querybuf.c_str()); |
| 570 | |
| 571 | errmsg=NULL; |
| 572 | |
| 573 | sqlite3_exec(dbh, querybuf.c_str(), enumerate_callback, |
| 574 | reinterpret_cast<void *>(&cb), &errmsg); |
| 575 | |
| 576 | if (errmsg) |
| 577 | { |
| 578 | err(errmsg); |
| 579 | sqlite3_free(errmsg); |
| 580 | } |
| 581 | |
| 582 | (*cb.cb_func)(NULL, 0, 0, NULL, NULL, NULL, cb.void_arg); |
| 583 | } |
| 584 | |
| 585 | ///////////////////////////////////////////////////////////////////////////// |
| 586 | |
| 587 | int auth_sqlite_setpass(const char *user, const char *pass, |
| 588 | const char *oldpass) |
| 589 | { |
| 590 | authsqlite_connection *conn=authsqlite_connection::connect(); |
| 591 | |
| 592 | if (conn && !conn->setpass(user, pass, oldpass)) |
| 593 | return -1; |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | void auth_sqlite_enumerate( void(*cb_func)(const char *name, |
| 598 | uid_t uid, |
| 599 | gid_t gid, |
| 600 | const char *homedir, |
| 601 | const char *maildir, |
| 602 | const char *options, |
| 603 | void *void_arg), |
| 604 | void *void_arg) |
| 605 | { |
| 606 | authsqlite_connection *conn=authsqlite_connection::connect(); |
| 607 | |
| 608 | if (conn) |
| 609 | conn->enumerate(cb_func, void_arg); |
| 610 | } |
| 611 | |
| 612 | bool auth_sqlite_getuserinfo(const char *username, |
| 613 | const char *service, |
| 614 | authsqliteuserinfo &ui) |
| 615 | { |
| 616 | authsqlite_connection *conn=authsqlite_connection::connect(); |
| 617 | |
| 618 | if (conn) |
| 619 | return conn->getuserinfo(username, service, ui); |
| 620 | return false; |
| 621 | |
| 622 | } |
| 623 | |
| 624 | void auth_sqlite_cleanup() |
| 625 | { |
| 626 | do_auth_sqlite_cleanup(); |
| 627 | } |