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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Manages user authentication with Keycloak via OIDC. |
| 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 Thorsten Rinne <thorsten@phpmyfaq.de> |
| 12 | * @copyright 2026 phpMyFAQ Team |
| 13 | * @license https://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0 |
| 14 | * @link https://www.phpmyfaq.de |
| 15 | * @since 2026-04-18 |
| 16 | */ |
| 17 | |
| 18 | declare(strict_types=1); |
| 19 | |
| 20 | namespace phpMyFAQ\Auth; |
| 21 | |
| 22 | use Closure; |
| 23 | use phpMyFAQ\Auth; |
| 24 | use phpMyFAQ\Auth\Oidc\OidcProviderConfig; |
| 25 | use phpMyFAQ\Configuration; |
| 26 | use phpMyFAQ\Core\Exception; |
| 27 | use phpMyFAQ\Enums\AuthenticationSourceType; |
| 28 | use phpMyFAQ\Permission\MediumPermission; |
| 29 | use phpMyFAQ\User; |
| 30 | use SensitiveParameter; |
| 31 | |
| 32 | class AuthKeycloak extends Auth implements AuthDriverInterface |
| 33 | { |
| 34 | /** @param array<string, mixed> $claims */ |
| 35 | public function __construct( |
| 36 | Configuration $configuration, |
| 37 | private readonly OidcProviderConfig $providerConfig, |
| 38 | private readonly array $claims, |
| 39 | private readonly string $resolvedLogin, |
| 40 | private readonly ?Closure $userFactory = null, |
| 41 | private readonly ?Closure $mediumPermissionFactory = null, |
| 42 | ) { |
| 43 | parent::__construct($configuration); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * @throws Exception |
| 48 | */ |
| 49 | public function create(string $login, #[SensitiveParameter] string $password, string $domain = ''): bool |
| 50 | { |
| 51 | $user = $this->createUser(); |
| 52 | |
| 53 | try { |
| 54 | $result = $user->createUser($login, '', $domain); |
| 55 | } catch (\Exception $exception) { |
| 56 | $this->configuration |
| 57 | ->getLogger() |
| 58 | ->error(sprintf( |
| 59 | 'Keycloak user creation failed for "%s": %s', |
| 60 | $this->redactIdentifier($login), |
| 61 | $exception->getMessage(), |
| 62 | )); |
| 63 | return false; |
| 64 | } |
| 65 | |
| 66 | if (!$result) { |
| 67 | return false; |
| 68 | } |
| 69 | |
| 70 | try { |
| 71 | $saved = $user->setUserData([ |
| 72 | 'display_name' => $this->getDisplayName(), |
| 73 | 'email' => $this->getEmail(), |
| 74 | 'keycloak_sub' => $this->getSubject(), |
| 75 | ]); |
| 76 | } catch (\Exception $exception) { |
| 77 | $this->configuration |
| 78 | ->getLogger() |
| 79 | ->error(sprintf( |
| 80 | 'Keycloak user data persistence failed for "%s": %s', |
| 81 | $this->redactIdentifier($login), |
| 82 | $exception->getMessage(), |
| 83 | )); |
| 84 | return false; |
| 85 | } |
| 86 | |
| 87 | if (!$saved) { |
| 88 | $this->configuration |
| 89 | ->getLogger() |
| 90 | ->error(sprintf( |
| 91 | 'Keycloak user data persistence returned false for "%s"', |
| 92 | $this->redactIdentifier($login), |
| 93 | )); |
| 94 | return false; |
| 95 | } |
| 96 | |
| 97 | $user->setStatus('active'); |
| 98 | $user->setAuthSource(AuthenticationSourceType::AUTH_KEYCLOAK->value); |
| 99 | |
| 100 | if ($this->shouldAssignGroups()) { |
| 101 | $this->assignUserToGroups($user->getUserId()); |
| 102 | } |
| 103 | |
| 104 | return true; |
| 105 | } |
| 106 | |
| 107 | public function update(string $login, #[SensitiveParameter] string $password): bool |
| 108 | { |
| 109 | return true; |
| 110 | } |
| 111 | |
| 112 | public function delete(string $login): bool |
| 113 | { |
| 114 | return true; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * @throws Exception |
| 119 | */ |
| 120 | public function checkCredentials( |
| 121 | string $login, |
| 122 | #[SensitiveParameter] |
| 123 | string $password, |
| 124 | ?array $optionalData = null, |
| 125 | ): bool { |
| 126 | if ($login !== $this->resolvedLogin) { |
| 127 | return false; |
| 128 | } |
| 129 | |
| 130 | $existingUser = $this->findUser($login); |
| 131 | if ($existingUser instanceof User) { |
| 132 | if ($this->shouldSynchronizeGroupsOnLogin()) { |
| 133 | $this->assignUserToGroups($existingUser->getUserId()); |
| 134 | } |
| 135 | |
| 136 | return true; |
| 137 | } |
| 138 | |
| 139 | if (!$this->providerConfig->autoProvision) { |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | return $this->create($login, ''); |
| 144 | } |
| 145 | |
| 146 | public function isValidLogin(string $login, ?array $optionalData = null): int |
| 147 | { |
| 148 | return $login === $this->resolvedLogin ? 1 : 0; |
| 149 | } |
| 150 | |
| 151 | private function getDisplayName(): string |
| 152 | { |
| 153 | $name = trim((string) ($this->claims['name'] ?? '')); |
| 154 | if ($name !== '') { |
| 155 | return $name; |
| 156 | } |
| 157 | |
| 158 | $preferredUsername = trim((string) ($this->claims['preferred_username'] ?? '')); |
| 159 | if ($preferredUsername !== '') { |
| 160 | return $preferredUsername; |
| 161 | } |
| 162 | |
| 163 | return $this->resolvedLogin; |
| 164 | } |
| 165 | |
| 166 | private function getEmail(): string |
| 167 | { |
| 168 | return trim((string) ($this->claims['email'] ?? '')); |
| 169 | } |
| 170 | |
| 171 | private function getSubject(): string |
| 172 | { |
| 173 | return trim((string) ($this->claims['sub'] ?? '')); |
| 174 | } |
| 175 | |
| 176 | private function findUser(string $login): ?User |
| 177 | { |
| 178 | $user = $this->createUser(); |
| 179 | return $user->getUserByLogin($login, false) ? $user : null; |
| 180 | } |
| 181 | |
| 182 | private function shouldAssignGroups(): bool |
| 183 | { |
| 184 | return ( |
| 185 | $this->toBool($this->configuration->get(item: 'keycloak.groupAutoAssign')) |
| 186 | && $this->configuration->get(item: 'security.permLevel') === 'medium' |
| 187 | ); |
| 188 | } |
| 189 | |
| 190 | private function assignUserToGroups(int $userId): void |
| 191 | { |
| 192 | if ($userId <= 0) { |
| 193 | return; |
| 194 | } |
| 195 | |
| 196 | $mediumPermission = $this->createMediumPermission(); |
| 197 | $groupMapping = $this->getGroupMapping(); |
| 198 | if ($groupMapping === []) { |
| 199 | return; |
| 200 | } |
| 201 | |
| 202 | $currentGroupIds = $mediumPermission->getUserGroups($userId); |
| 203 | $desiredGroupIds = []; |
| 204 | $roleNames = $this->extractRoleNames(); |
| 205 | |
| 206 | foreach ($roleNames as $roleName) { |
| 207 | if (!array_key_exists($roleName, $groupMapping)) { |
| 208 | continue; |
| 209 | } |
| 210 | $faqGroupName = $groupMapping[$roleName]; |
| 211 | $groupId = $mediumPermission->findOrCreateGroupByName($faqGroupName); |
| 212 | if ($groupId <= 0) { |
| 213 | continue; |
| 214 | } |
| 215 | |
| 216 | $desiredGroupIds[] = $groupId; |
| 217 | if (in_array($groupId, $currentGroupIds, strict: true)) { |
| 218 | continue; |
| 219 | } |
| 220 | |
| 221 | $mediumPermission->addToGroup($userId, $groupId); |
| 222 | $this->configuration |
| 223 | ->getLogger() |
| 224 | ->info(sprintf('Added Keycloak user #%d to group %s', $userId, $faqGroupName)); |
| 225 | } |
| 226 | |
| 227 | if (!$this->shouldSynchronizeGroupsOnLogin()) { |
| 228 | return; |
| 229 | } |
| 230 | |
| 231 | foreach (array_values(array_unique($groupMapping)) as $groupName) { |
| 232 | $groupId = $mediumPermission->getGroupId($groupName); |
| 233 | if ($groupId <= 0) { |
| 234 | continue; |
| 235 | } |
| 236 | |
| 237 | if ( |
| 238 | !in_array($groupId, $currentGroupIds, strict: true) |
| 239 | || in_array($groupId, $desiredGroupIds, strict: true) |
| 240 | ) { |
| 241 | continue; |
| 242 | } |
| 243 | |
| 244 | $mediumPermission->removeFromGroup($userId, $groupId); |
| 245 | $this->configuration |
| 246 | ->getLogger() |
| 247 | ->info(sprintf('Removed Keycloak user #%d from group %s', $userId, $groupName)); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * @return array<string> |
| 253 | */ |
| 254 | private function extractRoleNames(): array |
| 255 | { |
| 256 | $roleNames = []; |
| 257 | |
| 258 | $realmRoles = $this->claims['realm_access']['roles'] ?? []; |
| 259 | if (is_array($realmRoles)) { |
| 260 | foreach ($realmRoles as $realmRole) { |
| 261 | if (!is_string($realmRole) || $realmRole === '') { |
| 262 | continue; |
| 263 | } |
| 264 | |
| 265 | $roleNames[] = $realmRole; |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | $clientId = trim((string) $this->configuration->get(item: 'keycloak.clientId')); |
| 270 | if ($clientId !== '') { |
| 271 | $clientRoles = $this->claims['resource_access'][$clientId]['roles'] ?? []; |
| 272 | if (is_array($clientRoles)) { |
| 273 | foreach ($clientRoles as $clientRole) { |
| 274 | if (!is_string($clientRole) || $clientRole === '') { |
| 275 | continue; |
| 276 | } |
| 277 | |
| 278 | $roleNames[] = $clientRole; |
| 279 | } |
| 280 | } |
| 281 | } |
| 282 | |
| 283 | return array_values(array_unique($roleNames)); |
| 284 | } |
| 285 | |
| 286 | /** |
| 287 | * @return array<string, string> |
| 288 | */ |
| 289 | private function getGroupMapping(): array |
| 290 | { |
| 291 | $groupMapping = $this->configuration->get(item: 'keycloak.groupMapping'); |
| 292 | if (!is_string($groupMapping) || trim($groupMapping) === '') { |
| 293 | return []; |
| 294 | } |
| 295 | |
| 296 | $decoded = json_decode($groupMapping, associative: true); |
| 297 | if (!is_array($decoded)) { |
| 298 | return []; |
| 299 | } |
| 300 | |
| 301 | $mapping = []; |
| 302 | foreach ($decoded as $keycloakGroup => $faqGroup) { |
| 303 | if (!is_string($faqGroup)) { |
| 304 | continue; |
| 305 | } |
| 306 | |
| 307 | $mapping[(string) $keycloakGroup] = $faqGroup; |
| 308 | } |
| 309 | |
| 310 | return $mapping; |
| 311 | } |
| 312 | |
| 313 | private function toBool(mixed $value): bool |
| 314 | { |
| 315 | return filter_var($value, FILTER_VALIDATE_BOOLEAN); |
| 316 | } |
| 317 | |
| 318 | private function shouldSynchronizeGroupsOnLogin(): bool |
| 319 | { |
| 320 | return ( |
| 321 | $this->toBool($this->configuration->get(item: 'keycloak.groupSyncOnLogin')) |
| 322 | && $this->configuration->get(item: 'security.permLevel') === 'medium' |
| 323 | ); |
| 324 | } |
| 325 | |
| 326 | private function redactIdentifier(string $identifier): string |
| 327 | { |
| 328 | if (str_contains($identifier, '@')) { |
| 329 | [$local, $domain] = explode('@', string: $identifier, limit: 2); |
| 330 | return $local[0] . '***@' . $domain; |
| 331 | } |
| 332 | |
| 333 | if (mb_strlen($identifier) <= 3) { |
| 334 | return str_repeat('*', mb_strlen($identifier)); |
| 335 | } |
| 336 | |
| 337 | return mb_substr($identifier, start: 0, length: 3) . '…'; |
| 338 | } |
| 339 | |
| 340 | /** |
| 341 | * @throws Exception |
| 342 | */ |
| 343 | private function createUser(): User |
| 344 | { |
| 345 | if ($this->userFactory instanceof Closure) { |
| 346 | $user = ($this->userFactory)(); |
| 347 | if ($user instanceof User) { |
| 348 | return $user; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | return new User($this->configuration); |
| 353 | } |
| 354 | |
| 355 | private function createMediumPermission(): MediumPermission |
| 356 | { |
| 357 | if ($this->mediumPermissionFactory instanceof Closure) { |
| 358 | $mediumPermission = ($this->mediumPermissionFactory)(); |
| 359 | if ($mediumPermission instanceof MediumPermission) { |
| 360 | return $mediumPermission; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | return new MediumPermission($this->configuration); |
| 365 | } |
| 366 | } |