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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * The Ldap class provides methods and functions for LDAP and/or Active Directory. |
| 5 | * |
| 6 | * This Source Code Form is subject to the terms of the Mozilla Public License, |
| 7 | * v. 2.0. If a copy of the MPL was not distributed with this file, You can |
| 8 | * obtain one at https://mozilla.org/MPL/2.0/. |
| 9 | * |
| 10 | * @package phpMyFAQ |
| 11 | * @author Adam Greene <phpmyfaq@skippy.fastmail.fm> |
| 12 | * @author Thorsten Rinne <thorsten@phpmyfaq.de> |
| 13 | * @author Alberto Cabello Sanchez <alberto@unex.es> |
| 14 | * @author Lars Scheithauer <larsscheithauer@googlemail.com> |
| 15 | * @copyright 2004-2026 phpMyFAQ Team |
| 16 | * @license https://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0 |
| 17 | * @link https://www.phpmyfaq.de |
| 18 | * @since 2004-12-16 |
| 19 | */ |
| 20 | |
| 21 | declare(strict_types=1); |
| 22 | |
| 23 | namespace phpMyFAQ; |
| 24 | |
| 25 | use LDAP\Connection; |
| 26 | use SensitiveParameter; |
| 27 | |
| 28 | /** |
| 29 | * Class Ldap |
| 30 | * |
| 31 | * @package phpMyFAQ |
| 32 | */ |
| 33 | class Ldap |
| 34 | { |
| 35 | /** |
| 36 | * Error. |
| 37 | */ |
| 38 | public ?string $error = null; |
| 39 | |
| 40 | /** |
| 41 | * LDAP error number. |
| 42 | */ |
| 43 | public ?int $errno = null; |
| 44 | |
| 45 | private readonly array $ldapConfig; |
| 46 | |
| 47 | /** |
| 48 | * The LDAP connection, present after a successful connect(). |
| 49 | */ |
| 50 | private ?Connection $ds = null; |
| 51 | |
| 52 | /** |
| 53 | * The LDAP base. |
| 54 | */ |
| 55 | private ?string $base = null; |
| 56 | |
| 57 | /** |
| 58 | * Constructor. |
| 59 | */ |
| 60 | public function __construct( |
| 61 | private readonly Configuration $configuration, |
| 62 | ) { |
| 63 | $this->ldapConfig = $this->configuration->getLdapConfig(); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Connects to a given LDAP server with given credentials. |
| 68 | */ |
| 69 | public function connect( |
| 70 | string $ldapServer, |
| 71 | int $ldapPort, |
| 72 | string $ldapBase, |
| 73 | string $ldapUser = '', |
| 74 | #[SensitiveParameter] |
| 75 | string $ldapPassword = '', |
| 76 | ): bool { |
| 77 | // Sanity checks |
| 78 | if ('' === $ldapServer || '' === $ldapBase) { |
| 79 | return false; |
| 80 | } |
| 81 | |
| 82 | $this->base = $ldapBase; |
| 83 | $connection = ldap_connect($ldapServer . ':' . $ldapPort); |
| 84 | |
| 85 | if (!$connection instanceof Connection) { |
| 86 | $this->error = 'Unable to connect to LDAP server'; |
| 87 | $this->ds = null; |
| 88 | |
| 89 | return false; |
| 90 | } |
| 91 | |
| 92 | $this->ds = $connection; |
| 93 | |
| 94 | // Set LDAP options |
| 95 | foreach ($this->configuration->getLdapOptions() as $key => $ldapOption) { |
| 96 | if (ldap_set_option($connection, (int) constant($key), $ldapOption)) { |
| 97 | continue; |
| 98 | } |
| 99 | |
| 100 | $this->errno = ldap_errno($connection); |
| 101 | $errorMessage = 'Unable to set LDAP option "%s" to "%s" (Error: %s).'; |
| 102 | $this->error = sprintf($errorMessage, $key, print_r($ldapOption, return: true), ldap_error($connection)); |
| 103 | |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | $ldapBind = match (true) { |
| 108 | true === $this->configuration->get(item: 'ldap.ldap_use_dynamic_login') => $this->bind( |
| 109 | (string) $this->configuration->get(item: 'ldap.ldap_dynamic_login_attribute') |
| 110 | . '=' |
| 111 | . $ldapUser |
| 112 | . ',' |
| 113 | . $ldapBase, |
| 114 | $ldapPassword, |
| 115 | ), |
| 116 | true === $this->configuration->get(item: 'ldap.ldap_use_anonymous_login') => $this->bind(), |
| 117 | default => $this->bind($ldapUser, $ldapPassword), |
| 118 | }; |
| 119 | |
| 120 | if (false === $ldapBind) { |
| 121 | $this->errno = ldap_errno($connection); |
| 122 | $this->error = sprintf('Unable to bind to LDAP server (Error: %s).', ldap_error($connection)); |
| 123 | $this->ds = null; |
| 124 | |
| 125 | return false; |
| 126 | } |
| 127 | |
| 128 | return true; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Binds to the LDAP directory with specified RDN and password. |
| 133 | */ |
| 134 | /* @mago-expect lint:no-error-control-operator - ldap_bind raises warnings instead of exceptions; the boolean result is the error signal */ |
| 135 | public function bind(string $rdn = '', #[SensitiveParameter] string $password = ''): bool |
| 136 | { |
| 137 | if (!$this->ds instanceof Connection) { |
| 138 | $this->error = 'The LDAP connection handler is not a valid resource.'; |
| 139 | |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | if ('' === $rdn && '' === $password) { |
| 144 | return @ldap_bind($this->ds, dn: null, password: null); |
| 145 | } |
| 146 | |
| 147 | return @ldap_bind($this->ds, $rdn, $password); |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Returns the user's email address from LDAP. |
| 152 | * |
| 153 | * @param string $username Username |
| 154 | */ |
| 155 | public function getMail(string $username): bool|string |
| 156 | { |
| 157 | return $this->getLdapData($username, data: 'mail'); |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Returns specific data from LDAP. |
| 162 | * |
| 163 | * @param string $username Username |
| 164 | * @param string $data MapKey |
| 165 | */ |
| 166 | /* @mago-expect lint:no-error-control-operator - ldap_search raises warnings instead of exceptions; failures are reported via $this->error */ |
| 167 | private function getLdapData(string $username, string $data): bool|string |
| 168 | { |
| 169 | $connection = $this->ds; |
| 170 | if (!$connection instanceof Connection) { |
| 171 | $this->error = 'The LDAP connection handler is not a valid resource.'; |
| 172 | |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | $base = $this->base; |
| 177 | if ($base === null || $base === '') { |
| 178 | $this->error = 'LDAP base DN is not configured.'; |
| 179 | |
| 180 | return false; |
| 181 | } |
| 182 | |
| 183 | $mapping = $this->ldapConfig['ldap_mapping'] ?? null; |
| 184 | if (!is_array($mapping) || !array_key_exists($data, $mapping)) { |
| 185 | $errorMessage = 'The requested data field "%s" does not exist in LDAP mapping configuration.'; |
| 186 | $this->error = sprintf($errorMessage, $data); |
| 187 | |
| 188 | return false; |
| 189 | } |
| 190 | |
| 191 | $comparison = '(%s=%s)'; |
| 192 | $filter = sprintf( |
| 193 | $comparison, |
| 194 | (string) $this->configuration->get(item: 'ldap.ldap_mapping.username'), |
| 195 | $this->quote($username), |
| 196 | ); |
| 197 | |
| 198 | if ($this->configuration->get(item: 'ldap.ldap_use_memberOf')) { |
| 199 | $comparison = '(&%s(memberOf:1.2.840.113556.1.4.1941:=%s))'; |
| 200 | $filter = sprintf( |
| 201 | $comparison, |
| 202 | $filter, |
| 203 | (string) $this->configuration->get(item: 'ldap.ldap_mapping.memberOf'), |
| 204 | ); |
| 205 | } |
| 206 | |
| 207 | $field = (string) $mapping[$data]; |
| 208 | |
| 209 | $searchResult = @ldap_search($connection, $base, $filter, [$field]); |
| 210 | |
| 211 | if (!$searchResult || is_array($searchResult)) { |
| 212 | $errorMessage = 'Unable to search for "%s" (Error: %s)'; |
| 213 | $this->error = sprintf($errorMessage, $username, ldap_error($connection)); |
| 214 | |
| 215 | return false; |
| 216 | } |
| 217 | |
| 218 | $entryId = ldap_first_entry($connection, $searchResult); |
| 219 | |
| 220 | if (!$entryId) { |
| 221 | $this->errno = ldap_errno($connection); |
| 222 | $this->error = sprintf('Cannot get the value(s). Error: %s', ldap_error($connection)); |
| 223 | |
| 224 | return false; |
| 225 | } |
| 226 | |
| 227 | $entries = ldap_get_entries($connection, $searchResult); |
| 228 | if ($entries === false) { |
| 229 | return false; |
| 230 | } |
| 231 | |
| 232 | for ($i = 0; $i < (int) $entries['count']; ++$i) { |
| 233 | if ( |
| 234 | !array_key_exists($i, $entries) |
| 235 | || !is_array($entries[$i]) |
| 236 | || !array_key_exists($field, $entries[$i]) |
| 237 | || !is_array($entries[$i][$field]) |
| 238 | || !array_key_exists(0, $entries[$i][$field]) |
| 239 | ) { |
| 240 | continue; |
| 241 | } |
| 242 | |
| 243 | return (string) $entries[$i][$field][0]; |
| 244 | } |
| 245 | |
| 246 | return false; |
| 247 | } |
| 248 | |
| 249 | /** |
| 250 | * Quotes LDAP strings in accordance with the RFC 2254. |
| 251 | */ |
| 252 | public function quote(string $string): string |
| 253 | { |
| 254 | return str_replace(['\\', ' ', '*', '(', ')'], ['\\5c', '\\20', '\\2a', '\\28', '\\29'], $string); |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Returns the user's DN. |
| 259 | * |
| 260 | * @param string $username Username |
| 261 | */ |
| 262 | public function getDn(string $username): bool|string |
| 263 | { |
| 264 | return $this->getLdapDn($username); |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * Returns the DN from LDAP. |
| 269 | * |
| 270 | * @param string $username Username |
| 271 | */ |
| 272 | /* @mago-expect lint:no-error-control-operator - ldap_search raises warnings instead of exceptions; failures are reported via $this->error */ |
| 273 | private function getLdapDn(string $username): string|false |
| 274 | { |
| 275 | $connection = $this->ds; |
| 276 | if (!$connection instanceof Connection) { |
| 277 | $this->error = 'The LDAP connection handler is not a valid resource.'; |
| 278 | |
| 279 | return false; |
| 280 | } |
| 281 | |
| 282 | $base = $this->base; |
| 283 | if ($base === null || $base === '') { |
| 284 | $this->error = 'LDAP base DN is not configured.'; |
| 285 | |
| 286 | return false; |
| 287 | } |
| 288 | |
| 289 | $comparison = '(%s=%s)'; |
| 290 | $filter = sprintf( |
| 291 | $comparison, |
| 292 | (string) $this->configuration->get(item: 'ldap.ldap_mapping.username'), |
| 293 | $this->quote($username), |
| 294 | ); |
| 295 | $sr = @ldap_search($connection, $base, $filter); |
| 296 | |
| 297 | if (false === $sr || is_array($sr)) { |
| 298 | $errorMessage = 'Unable to search for "%s" (Error: %s)'; |
| 299 | $this->error = sprintf($errorMessage, $username, ldap_error($connection)); |
| 300 | |
| 301 | return false; |
| 302 | } |
| 303 | |
| 304 | $entryId = ldap_first_entry($connection, $sr); |
| 305 | |
| 306 | if (false === $entryId) { |
| 307 | $this->error = sprintf('Cannot get the value(s). Error: %s', ldap_error($connection)); |
| 308 | |
| 309 | return false; |
| 310 | } |
| 311 | |
| 312 | return ldap_get_dn($connection, $entryId); |
| 313 | } |
| 314 | |
| 315 | /** |
| 316 | * Returns the user's full name from LDAP. |
| 317 | * |
| 318 | * @param string $username Username |
| 319 | */ |
| 320 | public function getCompleteName(string $username): bool|string |
| 321 | { |
| 322 | return $this->getLdapData($username, data: 'name'); |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * Returns the user's AD group memberships. |
| 327 | * |
| 328 | * @param string $username Username |
| 329 | * @return array<string>|false Array of group DNs or false on error |
| 330 | */ |
| 331 | /* @mago-expect lint:no-error-control-operator - ldap_search raises warnings instead of exceptions; failures are reported via $this->error */ |
| 332 | public function getGroupMemberships(string $username): array|false |
| 333 | { |
| 334 | $connection = $this->ds; |
| 335 | if (!$connection instanceof Connection) { |
| 336 | $this->error = 'The LDAP connection handler is not a valid resource.'; |
| 337 | return false; |
| 338 | } |
| 339 | |
| 340 | $base = $this->base; |
| 341 | if ($base === null || $base === '') { |
| 342 | $this->error = 'LDAP base DN is not configured.'; |
| 343 | return false; |
| 344 | } |
| 345 | |
| 346 | $comparison = '(%s=%s)'; |
| 347 | $filter = sprintf( |
| 348 | $comparison, |
| 349 | (string) $this->configuration->get(item: 'ldap.ldap_mapping.username'), |
| 350 | $this->quote($username), |
| 351 | ); |
| 352 | |
| 353 | $fields = ['memberOf']; |
| 354 | |
| 355 | $searchResult = @ldap_search($connection, $base, $filter, $fields); |
| 356 | |
| 357 | if (!$searchResult || is_array($searchResult)) { |
| 358 | $errorMessage = 'Unable to search for "%s" (Error: %s)'; |
| 359 | $this->error = sprintf($errorMessage, $username, ldap_error($connection)); |
| 360 | |
| 361 | return false; |
| 362 | } |
| 363 | |
| 364 | $entryId = ldap_first_entry($connection, $searchResult); |
| 365 | |
| 366 | if (!$entryId) { |
| 367 | $this->errno = ldap_errno($connection); |
| 368 | $this->error = sprintf('Cannot get the value(s). Error: %s', ldap_error($connection)); |
| 369 | |
| 370 | return false; |
| 371 | } |
| 372 | |
| 373 | $entries = ldap_get_entries($connection, $searchResult); |
| 374 | $groups = []; |
| 375 | if ($entries === false) { |
| 376 | return $groups; |
| 377 | } |
| 378 | |
| 379 | $memberOf = $entries[0]['memberof'] ?? null; |
| 380 | if ((int) $entries['count'] > 0 && is_array($memberOf)) { |
| 381 | $memberOfCount = (int) ($memberOf['count'] ?? 0); |
| 382 | for ($i = 0; $i < $memberOfCount; $i++) { |
| 383 | $groups[] = (string) $memberOf[$i]; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | return $groups; |
| 388 | } |
| 389 | |
| 390 | /** |
| 391 | * Returns the LDAP error message of the last LDAP command. |
| 392 | */ |
| 393 | public function error(?Connection $ds = null): string |
| 394 | { |
| 395 | $connection = $ds ?? $this->ds; |
| 396 | if (!$connection instanceof Connection) { |
| 397 | return 'The LDAP connection handler is not a valid resource.'; |
| 398 | } |
| 399 | |
| 400 | return ldap_error($connection); |
| 401 | } |
| 402 | } |