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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <nick@popphp.org> |
| 8 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Acl; |
| 16 | |
| 17 | use Pop\Acl\Assertion\AssertionInterface; |
| 18 | use InvalidArgumentException; |
| 19 | |
| 20 | /** |
| 21 | * ACL class |
| 22 | * |
| 23 | * @category Pop |
| 24 | * @package Pop\Acl |
| 25 | * @author Nick Sagona, III <nick@popphp.org> |
| 26 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 27 | * @license https://www.popphp.org/license New BSD License |
| 28 | * @version 5.0.0 |
| 29 | */ |
| 30 | class Acl |
| 31 | { |
| 32 | |
| 33 | /** |
| 34 | * Array of roles |
| 35 | * @var array |
| 36 | */ |
| 37 | protected array $roles = []; |
| 38 | |
| 39 | /** |
| 40 | * Array of resources |
| 41 | * @var array |
| 42 | */ |
| 43 | protected array $resources = []; |
| 44 | |
| 45 | /** |
| 46 | * Array of allowed roles, resources and permissions |
| 47 | * @var array |
| 48 | */ |
| 49 | protected array $allowed = []; |
| 50 | |
| 51 | /** |
| 52 | * Array of denied roles, resources and permissions |
| 53 | * @var array |
| 54 | */ |
| 55 | protected array $denied = []; |
| 56 | |
| 57 | /** |
| 58 | * Array of assertions |
| 59 | * @var array |
| 60 | */ |
| 61 | protected array $assertions = [ |
| 62 | 'allowed' => [], |
| 63 | 'denied' => [] |
| 64 | ]; |
| 65 | |
| 66 | /** |
| 67 | * Array of policies |
| 68 | * @var array |
| 69 | */ |
| 70 | protected array $policies = []; |
| 71 | |
| 72 | /** |
| 73 | * Strict flag |
| 74 | * @var bool |
| 75 | */ |
| 76 | protected bool $strict = false; |
| 77 | |
| 78 | /** |
| 79 | * Multi strict flag |
| 80 | * @var bool |
| 81 | */ |
| 82 | protected bool $multiStrict = false; |
| 83 | |
| 84 | /** |
| 85 | * Parent strict flag |
| 86 | * @var bool |
| 87 | */ |
| 88 | protected bool $parentStrict = false; |
| 89 | |
| 90 | /** |
| 91 | * Constructor |
| 92 | * |
| 93 | * Instantiate the ACL object |
| 94 | */ |
| 95 | public function __construct() |
| 96 | { |
| 97 | $args = func_get_args(); |
| 98 | |
| 99 | foreach ($args as $arg) { |
| 100 | if (is_array($arg)) { |
| 101 | foreach ($arg as $a) { |
| 102 | if ($a instanceof AclRole) { |
| 103 | $this->addRole($a); |
| 104 | } else if ($a instanceof AclResource) { |
| 105 | $this->addResource($a); |
| 106 | } |
| 107 | } |
| 108 | } else if ($arg instanceof AclRole) { |
| 109 | $this->addRole($arg); |
| 110 | } else if ($arg instanceof AclResource) { |
| 111 | $this->addResource($arg); |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * Get a role |
| 118 | * |
| 119 | * @param string $role |
| 120 | * @return AclRole|null |
| 121 | */ |
| 122 | public function getRole(string $role): AclRole|null |
| 123 | { |
| 124 | return $this->roles[$role] ?? null; |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * Get roles |
| 129 | * |
| 130 | * @return array |
| 131 | */ |
| 132 | public function getRoles(): array |
| 133 | { |
| 134 | return $this->roles; |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Has roles |
| 139 | * |
| 140 | * @return bool |
| 141 | */ |
| 142 | public function hasRoles(): bool |
| 143 | { |
| 144 | return !empty($this->roles); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * See if a role has been added |
| 149 | * |
| 150 | * @param string $role |
| 151 | * @return bool |
| 152 | */ |
| 153 | public function hasRole(string $role): bool |
| 154 | { |
| 155 | return (isset($this->roles[$role])); |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Add a role |
| 160 | * |
| 161 | * @param AclRole $role |
| 162 | * @return Acl |
| 163 | */ |
| 164 | public function addRole(AclRole $role): Acl |
| 165 | { |
| 166 | if (!isset($this->roles[$role->getName()])) { |
| 167 | $this->roles[$role->getName()] = $role; |
| 168 | |
| 169 | // Traverse up if role has parents |
| 170 | while ($role->hasParent()) { |
| 171 | $role = $role->getParent(); |
| 172 | $this->roles[$role->getName()] = $role; |
| 173 | } |
| 174 | |
| 175 | // Traverse down if the role has children |
| 176 | if ($role->hasChildren()) { |
| 177 | $this->traverseChildren($role->getChildren()); |
| 178 | } |
| 179 | } |
| 180 | return $this; |
| 181 | } |
| 182 | |
| 183 | /** |
| 184 | * Add roles |
| 185 | * |
| 186 | * @param array $roles |
| 187 | * @return Acl |
| 188 | */ |
| 189 | public function addRoles(array $roles): Acl |
| 190 | { |
| 191 | foreach ($roles as $role) { |
| 192 | $this->addRole($role); |
| 193 | } |
| 194 | |
| 195 | return $this; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * Remove a role |
| 200 | * |
| 201 | * Children are reparented onto the removed role's own parent (or become |
| 202 | * root roles if it had none). All allow/deny rules, assertions and |
| 203 | * policies referencing this role are purged. |
| 204 | * |
| 205 | * @param mixed $role |
| 206 | * @throws Exception |
| 207 | * @return Acl |
| 208 | */ |
| 209 | public function removeRole(mixed $role): Acl |
| 210 | { |
| 211 | $this->verifyRole($role); |
| 212 | |
| 213 | $roleObj = $this->roles[(string)$role]; |
| 214 | $roleName = (string)$roleObj; |
| 215 | $parent = $roleObj->getParent(); |
| 216 | |
| 217 | foreach ($roleObj->getChildren() as $child) { |
| 218 | if ($parent !== null) { |
| 219 | $child->setParent($parent); |
| 220 | } else { |
| 221 | $child->clearParent(); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | if ($parent !== null) { |
| 226 | $parent->removeChild($roleObj); |
| 227 | } |
| 228 | |
| 229 | foreach (['allowed', 'denied'] as $type) { |
| 230 | if (isset($this->{$type}[$roleName])) { |
| 231 | foreach ($this->{$type}[$roleName] as $resourceName => $permissions) { |
| 232 | $this->deleteRuleAssertions($type, $roleName, $resourceName, $permissions); |
| 233 | } |
| 234 | unset($this->{$type}[$roleName]); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | $this->policies = array_values(array_filter( |
| 239 | $this->policies, |
| 240 | fn($policy) => (string)$policy['role'] !== $roleName |
| 241 | )); |
| 242 | |
| 243 | unset($this->roles[$roleName]); |
| 244 | |
| 245 | return $this; |
| 246 | } |
| 247 | |
| 248 | /** |
| 249 | * Get a resource |
| 250 | * |
| 251 | * @param string $resource |
| 252 | * @return AclResource|null |
| 253 | */ |
| 254 | public function getResource(string $resource): AclResource|null |
| 255 | { |
| 256 | return $this->resources[$resource] ?? null; |
| 257 | } |
| 258 | |
| 259 | /** |
| 260 | * See if a resource has been added |
| 261 | * |
| 262 | * @param string $resource |
| 263 | * @return bool |
| 264 | */ |
| 265 | public function hasResource(string $resource): bool |
| 266 | { |
| 267 | return (isset($this->resources[$resource])); |
| 268 | } |
| 269 | |
| 270 | /** |
| 271 | * Add a resource |
| 272 | * |
| 273 | * @param AclResource $resource |
| 274 | * @return Acl |
| 275 | */ |
| 276 | public function addResource(AclResource $resource): Acl |
| 277 | { |
| 278 | $this->resources[$resource->getName()] = $resource; |
| 279 | return $this; |
| 280 | } |
| 281 | |
| 282 | /** |
| 283 | * Get resources |
| 284 | * |
| 285 | * @return array |
| 286 | */ |
| 287 | public function getResources(): array |
| 288 | { |
| 289 | return $this->resources; |
| 290 | } |
| 291 | |
| 292 | /** |
| 293 | * Has resources |
| 294 | * |
| 295 | * @return bool |
| 296 | */ |
| 297 | public function hasResources(): bool |
| 298 | { |
| 299 | return !empty($this->resources); |
| 300 | } |
| 301 | |
| 302 | /** |
| 303 | * Add resources |
| 304 | * |
| 305 | * @param array $resources |
| 306 | * @return Acl |
| 307 | */ |
| 308 | public function addResources(array $resources): Acl |
| 309 | { |
| 310 | foreach ($resources as $resource) { |
| 311 | $this->addResource($resource); |
| 312 | } |
| 313 | |
| 314 | return $this; |
| 315 | } |
| 316 | |
| 317 | /** |
| 318 | * Remove a resource |
| 319 | * |
| 320 | * All allow/deny rules, assertions and policies referencing this |
| 321 | * resource (across every role) are purged. |
| 322 | * |
| 323 | * @param mixed $resource |
| 324 | * @throws Exception |
| 325 | * @return Acl |
| 326 | */ |
| 327 | public function removeResource(mixed $resource): Acl |
| 328 | { |
| 329 | $this->verifyResource($resource); |
| 330 | |
| 331 | $resourceObj = $this->resources[(string)$resource]; |
| 332 | $resourceName = (string)$resourceObj; |
| 333 | |
| 334 | foreach (['allowed', 'denied'] as $type) { |
| 335 | foreach ($this->{$type} as $roleName => $resources) { |
| 336 | if (isset($resources[$resourceName])) { |
| 337 | $this->deleteRuleAssertions($type, $roleName, $resourceName, $resources[$resourceName]); |
| 338 | unset($this->{$type}[$roleName][$resourceName]); |
| 339 | // Remove the role entry if it has no more resources |
| 340 | if (count($this->{$type}[$roleName]) === 0) { |
| 341 | unset($this->{$type}[$roleName]); |
| 342 | } |
| 343 | } |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | $this->policies = array_values(array_filter( |
| 348 | $this->policies, |
| 349 | fn($policy) => ($policy['resource'] === null) || ((string)$policy['resource'] !== $resourceName) |
| 350 | )); |
| 351 | |
| 352 | unset($this->resources[$resourceName]); |
| 353 | |
| 354 | return $this; |
| 355 | } |
| 356 | |
| 357 | /** |
| 358 | * Set strict |
| 359 | * |
| 360 | * @param bool $strict |
| 361 | * @param bool|null $multiStrict |
| 362 | * @return Acl |
| 363 | */ |
| 364 | public function setStrict(bool $strict = true, bool|null $multiStrict = null): Acl |
| 365 | { |
| 366 | $this->strict = $strict; |
| 367 | if ($multiStrict !== null) { |
| 368 | $this->multiStrict = $multiStrict; |
| 369 | } |
| 370 | return $this; |
| 371 | } |
| 372 | |
| 373 | /** |
| 374 | * See if ACL object is set to strict |
| 375 | * |
| 376 | * @return bool |
| 377 | */ |
| 378 | public function isStrict(): bool |
| 379 | { |
| 380 | return $this->strict; |
| 381 | } |
| 382 | |
| 383 | /** |
| 384 | * Set multi strict |
| 385 | * |
| 386 | * @param bool $multiStrict |
| 387 | * @return Acl |
| 388 | */ |
| 389 | public function setMultiStrict(bool $multiStrict = true): Acl |
| 390 | { |
| 391 | $this->multiStrict = $multiStrict; |
| 392 | return $this; |
| 393 | } |
| 394 | |
| 395 | /** |
| 396 | * See if ACL object is set to multi strict |
| 397 | * |
| 398 | * @return bool |
| 399 | */ |
| 400 | public function isMultiStrict(): bool |
| 401 | { |
| 402 | return $this->multiStrict; |
| 403 | } |
| 404 | |
| 405 | /** |
| 406 | * Set parent strict |
| 407 | * |
| 408 | * @param bool $parentStrict |
| 409 | * @return Acl |
| 410 | */ |
| 411 | public function setParentStrict(bool $parentStrict = true): Acl |
| 412 | { |
| 413 | $this->parentStrict = $parentStrict; |
| 414 | return $this; |
| 415 | } |
| 416 | |
| 417 | /** |
| 418 | * See if ACL object is set to parent strict |
| 419 | * |
| 420 | * @return bool |
| 421 | */ |
| 422 | public function isParentStrict(): bool |
| 423 | { |
| 424 | return $this->parentStrict; |
| 425 | } |
| 426 | |
| 427 | /** |
| 428 | * Allow a role permission to a resource or resources |
| 429 | * |
| 430 | * @param mixed $role |
| 431 | * @param mixed $resource |
| 432 | * @param mixed $permission |
| 433 | * @param ?AssertionInterface $assertion |
| 434 | * @throws Exception |
| 435 | * @return Acl |
| 436 | */ |
| 437 | public function allow( |
| 438 | mixed $role, mixed $resource = null, mixed $permission = null, ?AssertionInterface $assertion = null |
| 439 | ): Acl |
| 440 | { |
| 441 | return $this->setRule('allowed', $role, $resource, $permission, $assertion); |
| 442 | } |
| 443 | |
| 444 | /** |
| 445 | * Remove an allow rule |
| 446 | * |
| 447 | * @param mixed $role |
| 448 | * @param mixed $resource |
| 449 | * @param mixed $permission |
| 450 | * @throws Exception |
| 451 | * @return Acl |
| 452 | */ |
| 453 | public function removeAllowRule(mixed $role, mixed $resource = null, mixed $permission = null): Acl |
| 454 | { |
| 455 | return $this->removeRule('allowed', $role, $resource, $permission); |
| 456 | } |
| 457 | |
| 458 | /** |
| 459 | * Deny a role permission to a resource or resources |
| 460 | * |
| 461 | * @param mixed $role |
| 462 | * @param mixed $resource |
| 463 | * @param mixed $permission |
| 464 | * @param ?AssertionInterface $assertion |
| 465 | * @throws Exception |
| 466 | * @return Acl |
| 467 | */ |
| 468 | public function deny( |
| 469 | mixed $role, mixed $resource = null, mixed $permission = null, ?AssertionInterface $assertion = null |
| 470 | ): Acl |
| 471 | { |
| 472 | return $this->setRule('denied', $role, $resource, $permission, $assertion); |
| 473 | } |
| 474 | |
| 475 | /** |
| 476 | * Shared implementation for allow()/deny() |
| 477 | * |
| 478 | * @param string $type |
| 479 | * @param mixed $role |
| 480 | * @param mixed $resource |
| 481 | * @param mixed $permission |
| 482 | * @param ?AssertionInterface $assertion |
| 483 | * @throws Exception |
| 484 | * @return Acl |
| 485 | */ |
| 486 | protected function setRule( |
| 487 | string $type, mixed $role, mixed $resource = null, mixed $permission = null, ?AssertionInterface $assertion = null |
| 488 | ): Acl |
| 489 | { |
| 490 | if ($this->verifyRole($role)) { |
| 491 | $role = $this->roles[(string)$role]; |
| 492 | |
| 493 | if (!isset($this->{$type}[(string)$role])) { |
| 494 | $this->{$type}[(string)$role] = []; |
| 495 | } |
| 496 | |
| 497 | if (($resource !== null) && ($this->verifyResource($resource))) { |
| 498 | $resource = $this->resources[(string)$resource]; |
| 499 | |
| 500 | if (!isset($this->{$type}[(string)$role][(string)$resource])) { |
| 501 | $this->{$type}[(string)$role][(string)$resource] = []; |
| 502 | } |
| 503 | if ($permission !== null) { |
| 504 | if (!is_array($permission)) { |
| 505 | $permission = [$permission]; |
| 506 | } |
| 507 | foreach ($permission as $perm) { |
| 508 | $this->{$type}[(string)$role][(string)$resource][] = $perm; |
| 509 | if ($assertion !== null) { |
| 510 | $this->createAssertion($assertion, $type, $role, $resource, $perm); |
| 511 | } |
| 512 | } |
| 513 | } else { |
| 514 | if ($assertion !== null) { |
| 515 | $this->createAssertion($assertion, $type, $role, $resource); |
| 516 | } |
| 517 | } |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | return $this; |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * Remove a deny rule |
| 526 | * |
| 527 | * @param mixed $role |
| 528 | * @param mixed $resource |
| 529 | * @param mixed $permission |
| 530 | * @throws Exception |
| 531 | * @return Acl |
| 532 | */ |
| 533 | public function removeDenyRule(mixed $role, mixed $resource = null, mixed $permission = null): Acl |
| 534 | { |
| 535 | return $this->removeRule('denied', $role, $resource, $permission); |
| 536 | } |
| 537 | |
| 538 | /** |
| 539 | * Shared implementation for removeAllowRule()/removeDenyRule() |
| 540 | * |
| 541 | * @param string $type |
| 542 | * @param mixed $role |
| 543 | * @param mixed $resource |
| 544 | * @param mixed $permission |
| 545 | * @throws Exception |
| 546 | * @return Acl |
| 547 | */ |
| 548 | protected function removeRule(string $type, mixed $role, mixed $resource = null, mixed $permission = null): Acl |
| 549 | { |
| 550 | if (($this->verifyRole($role)) && isset($this->{$type}[(string)$role])) { |
| 551 | // If only role passed |
| 552 | if (($resource === null) && ($permission === null)) { |
| 553 | unset($this->{$type}[(string)$role]); |
| 554 | $this->deleteAssertion($type, $role); |
| 555 | // If role & resource passed |
| 556 | } else if (($resource !== null) && ($permission === null) && ($this->verifyResource($resource)) && |
| 557 | isset($this->{$type}[(string)$role][(string)$resource])) { |
| 558 | unset($this->{$type}[(string)$role][(string)$resource]); |
| 559 | $this->deleteAssertion($type, $role, $resource); |
| 560 | // If role, resource & permission passed |
| 561 | } else { |
| 562 | if (!is_array($permission)) { |
| 563 | $permission = [$permission]; |
| 564 | } |
| 565 | foreach ($permission as $perm) { |
| 566 | if (($this->verifyResource($resource)) && isset($this->{$type}[(string)$role][(string)$resource]) && |
| 567 | in_array($perm, $this->{$type}[(string)$role][(string)$resource])) { |
| 568 | $key = array_search($perm, $this->{$type}[(string)$role][(string)$resource]); |
| 569 | unset($this->{$type}[(string)$role][(string)$resource][$key]); |
| 570 | } |
| 571 | $this->deleteAssertion($type, $role, $resource, $perm); |
| 572 | } |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | return $this; |
| 577 | } |
| 578 | |
| 579 | /** |
| 580 | * Determine if the role is allowed |
| 581 | * |
| 582 | * @param mixed $role |
| 583 | * @param mixed $resource |
| 584 | * @param mixed $permission |
| 585 | * @throws Exception |
| 586 | * @return bool |
| 587 | */ |
| 588 | public function isAllowed(mixed $role, mixed $resource = null, mixed $permission = null): bool |
| 589 | { |
| 590 | $result = false; |
| 591 | $isParent = false; |
| 592 | |
| 593 | // Evaluated once and shared with the internal deny check below, |
| 594 | // instead of letting isDenied() re-run evaluatePolicies() itself. |
| 595 | $policyResult = $this->hasPolicies() ? $this->evaluatePolicies($role, $resource, $permission) : null; |
| 596 | |
| 597 | if ($this->verifyRole($role)) { |
| 598 | if ($resource !== null) { |
| 599 | $this->verifyResource($resource); |
| 600 | } |
| 601 | |
| 602 | // If is not denied |
| 603 | if (!$this->resolveDenied($role, $resource, $permission, $policyResult)) { |
| 604 | // If not strict, pass |
| 605 | if ((!$this->strict) && (!$this->multiStrict)) { |
| 606 | $result = true; |
| 607 | // If strict, check for explicit allow rule |
| 608 | } else { |
| 609 | $roleToCheck = $this->roles[(string)$role]; |
| 610 | while ($roleToCheck !== null) { |
| 611 | if (isset($this->allowed[(string)$roleToCheck])) { |
| 612 | // No explicit resources or permissions |
| 613 | if (count($this->allowed[(string)$roleToCheck]) == 0) { |
| 614 | $result = true; |
| 615 | // Resource set, but no explicit permissions |
| 616 | } else if (($resource !== null) && isset($this->allowed[(string)$roleToCheck][(string)$resource]) && |
| 617 | (count($this->allowed[(string)$roleToCheck][(string)$resource]) == 0)) { |
| 618 | $result = true; |
| 619 | // Else, has resource and permissions set |
| 620 | } else if (($resource !== null) && ($permission !== null) && |
| 621 | isset($this->allowed[(string)$roleToCheck][(string)$resource]) && |
| 622 | (count($this->allowed[(string)$roleToCheck][(string)$resource]) > 0)) { |
| 623 | $permissionsToCheck = (!is_array($permission)) ? [$permission] : $permission; |
| 624 | $allowedPermissions = $this->allowed[(string)$roleToCheck][(string)$resource]; |
| 625 | $permissions = array_intersect($permissionsToCheck, $allowedPermissions); |
| 626 | |
| 627 | $result = ((($isParent) && (!$this->parentStrict)) || |
| 628 | (count($permissions) == count($permissionsToCheck)) || |
| 629 | in_array('*', $allowedPermissions, true)); |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | // Traverse up through the parent roles |
| 634 | $roleToCheck = $roleToCheck->getParent(); |
| 635 | $isParent = true; |
| 636 | } |
| 637 | } |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | // Check for assertions |
| 642 | if ($result) { |
| 643 | $assertionKey = $this->getAssertionKey('allowed', $role, $resource, $permission); |
| 644 | if ($assertionKey !== null) { |
| 645 | $assertionRole = $this->roles[(string)$role]; |
| 646 | $assertionResource = ($resource !== null) ? $this->resources[(string)$resource] : null; |
| 647 | $result = |
| 648 | $this->assertions['allowed'][$assertionKey]->assert($this, $assertionRole, $assertionResource, $permission); |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | // Check for policies |
| 653 | if ($policyResult !== null) { |
| 654 | $result = $policyResult; |
| 655 | } |
| 656 | |
| 657 | return $result; |
| 658 | } |
| 659 | |
| 660 | /** |
| 661 | * Determine if multiple roles are allowed |
| 662 | * |
| 663 | * @param array $roles |
| 664 | * @param mixed $resource |
| 665 | * @param mixed $permission |
| 666 | * @throws Exception |
| 667 | * @return bool |
| 668 | */ |
| 669 | public function isAllowedMulti(array $roles, mixed $resource = null, mixed $permission = null): bool |
| 670 | { |
| 671 | // If strict, all roles must be allowed |
| 672 | if ($this->multiStrict) { |
| 673 | $result = true; |
| 674 | foreach ($roles as $role) { |
| 675 | if (!$this->isAllowed($role, $resource, $permission)) { |
| 676 | $result = false; |
| 677 | break; |
| 678 | } |
| 679 | } |
| 680 | // Else, evaluate loosely |
| 681 | } else { |
| 682 | // Check for any explicitly set denied rules for any of the roles |
| 683 | foreach ($roles as $role) { |
| 684 | if ($this->isDenied($role, $resource, $permission)) { |
| 685 | return false; |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | // Else, evaluate if any of the roles are allowed |
| 690 | $result = false; |
| 691 | foreach ($roles as $role) { |
| 692 | if ($this->isAllowed($role, $resource, $permission)) { |
| 693 | $result = true; |
| 694 | break; |
| 695 | } |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | return $result; |
| 700 | } |
| 701 | |
| 702 | /** |
| 703 | * Determine if multiple roles are allowed using the strict parameter |
| 704 | * All of the roles must be allowed to return true, otherwise it will return false |
| 705 | * |
| 706 | * @param array $roles |
| 707 | * @param mixed $resource |
| 708 | * @param mixed $permission |
| 709 | * @throws Exception |
| 710 | * @return bool |
| 711 | */ |
| 712 | public function isAllowedMultiStrict(array $roles, mixed $resource = null, mixed $permission = null): bool |
| 713 | { |
| 714 | $this->multiStrict = true; |
| 715 | return $this->isAllowedMulti($roles, $resource, $permission); |
| 716 | } |
| 717 | |
| 718 | /** |
| 719 | * Determine if a role is denied |
| 720 | * |
| 721 | * @param mixed $role |
| 722 | * @param mixed $resource |
| 723 | * @param mixed $permission |
| 724 | * @throws Exception |
| 725 | * @return bool |
| 726 | */ |
| 727 | public function isDenied(mixed $role, mixed $resource = null, mixed $permission = null): bool |
| 728 | { |
| 729 | $policyResult = $this->hasPolicies() ? $this->evaluatePolicies($role, $resource, $permission) : null; |
| 730 | |
| 731 | return $this->resolveDenied($role, $resource, $permission, $policyResult); |
| 732 | } |
| 733 | |
| 734 | /** |
| 735 | * Shared deny evaluation used by isDenied() and, internally, isAllowed() |
| 736 | * (which passes in an already-evaluated policy result to avoid evaluating |
| 737 | * policies twice per isAllowed() call). |
| 738 | * |
| 739 | * @param mixed $role |
| 740 | * @param mixed $resource |
| 741 | * @param mixed $permission |
| 742 | * @param bool|null $policyResult |
| 743 | * @throws Exception |
| 744 | * @return bool |
| 745 | */ |
| 746 | protected function resolveDenied(mixed $role, mixed $resource, mixed $permission, bool|null $policyResult): bool |
| 747 | { |
| 748 | $result = false; |
| 749 | |
| 750 | if ($this->verifyRole($role)) { |
| 751 | if ($resource !== null) { |
| 752 | $this->verifyResource($resource); |
| 753 | } |
| 754 | |
| 755 | // Check if the user, resource and/or permission is denied |
| 756 | $roleToCheck = $this->roles[(string)$role]; |
| 757 | while ($roleToCheck !== null) { |
| 758 | if (isset($this->denied[(string)$roleToCheck])) { |
| 759 | if (count($this->denied[(string)$roleToCheck]) > 0) { |
| 760 | if (($resource !== null) && array_key_exists((string)$resource, $this->denied[(string)$roleToCheck])) { |
| 761 | if (count($this->denied[(string)$roleToCheck][(string)$resource]) > 0) { |
| 762 | if ($permission !== null) { |
| 763 | $deniedPermissions = $this->denied[(string)$roleToCheck][(string)$resource]; |
| 764 | if (in_array('*', $deniedPermissions, true)) { |
| 765 | $result = true; |
| 766 | } else { |
| 767 | $permissions = (!is_array($permission)) ? [$permission] : $permission; |
| 768 | foreach ($permissions as $p) { |
| 769 | if (in_array($p, $deniedPermissions)) { |
| 770 | $result = true; |
| 771 | } |
| 772 | } |
| 773 | } |
| 774 | } |
| 775 | } else { |
| 776 | $result = true; |
| 777 | } |
| 778 | } |
| 779 | } else { |
| 780 | $result = true; |
| 781 | } |
| 782 | } |
| 783 | $roleToCheck = $roleToCheck->getParent(); |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | // Check for assertions |
| 788 | $assertionKey = $this->getAssertionKey('denied', $role, $resource, $permission); |
| 789 | if ($assertionKey !== null) { |
| 790 | $assertionRole = $this->roles[(string)$role]; |
| 791 | $assertionResource = ($resource !== null) ? $this->resources[(string)$resource] : null; |
| 792 | $result = |
| 793 | $this->assertions['denied'][$assertionKey]->assert($this, $assertionRole, $assertionResource, $permission); |
| 794 | } |
| 795 | |
| 796 | // Check for policies |
| 797 | if ($policyResult !== null) { |
| 798 | $result = !$policyResult; |
| 799 | } |
| 800 | |
| 801 | return $result; |
| 802 | } |
| 803 | |
| 804 | /** |
| 805 | * Determine if multiple roles are denied |
| 806 | * |
| 807 | * @param array $roles |
| 808 | * @param mixed $resource |
| 809 | * @param mixed $permission |
| 810 | * @throws Exception |
| 811 | * @return bool |
| 812 | */ |
| 813 | public function isDeniedMulti(array $roles, mixed $resource = null, mixed $permission = null): bool |
| 814 | { |
| 815 | // If strict, all roles must be denied |
| 816 | if ($this->multiStrict) { |
| 817 | $result = true; |
| 818 | foreach ($roles as $role) { |
| 819 | if (!$this->isDenied($role, $resource, $permission)) { |
| 820 | $result = false; |
| 821 | break; |
| 822 | } |
| 823 | } |
| 824 | // Else, evaluate loosely |
| 825 | } else { |
| 826 | // Else, evaluate if any of the roles are denied |
| 827 | $result = false; |
| 828 | foreach ($roles as $role) { |
| 829 | if ($this->isDenied($role, $resource, $permission)) { |
| 830 | $result = true; |
| 831 | break; |
| 832 | } |
| 833 | } |
| 834 | } |
| 835 | |
| 836 | return $result; |
| 837 | } |
| 838 | |
| 839 | /** |
| 840 | * Determine if multiple roles are denied using the strict parameter |
| 841 | * All of the roles must be denied to return true, otherwise it will return false |
| 842 | * |
| 843 | * @param array $roles |
| 844 | * @param mixed $resource |
| 845 | * @param mixed $permission |
| 846 | * @return bool |
| 847 | *@throws Exception |
| 848 | */ |
| 849 | public function isDeniedMultiStrict(array $roles, mixed $resource = null, mixed $permission = null): bool |
| 850 | { |
| 851 | $this->multiStrict = true; |
| 852 | return $this->isDeniedMulti($roles, $resource, $permission); |
| 853 | } |
| 854 | |
| 855 | /** |
| 856 | * Get the effective allowed permissions for a role on a resource, |
| 857 | * merged with inheritance. Returns ['*'] if access is unrestricted |
| 858 | * (either via an explicit '*' permission or an empty permission list |
| 859 | * at any level of the role's parent chain), or [] if no rule exists. |
| 860 | * |
| 861 | * @param mixed $role |
| 862 | * @param mixed $resource |
| 863 | * @throws Exception |
| 864 | * @return array |
| 865 | */ |
| 866 | public function getAllowedPermissions(mixed $role, mixed $resource): array |
| 867 | { |
| 868 | return $this->getEffectivePermissions('allowed', $role, $resource); |
| 869 | } |
| 870 | |
| 871 | /** |
| 872 | * Get the effective denied permissions for a role on a resource, |
| 873 | * merged with inheritance. Returns ['*'] if denial is unrestricted |
| 874 | * (either via an explicit '*' permission or an empty permission list |
| 875 | * at any level of the role's parent chain), or [] if no rule exists. |
| 876 | * |
| 877 | * @param mixed $role |
| 878 | * @param mixed $resource |
| 879 | * @throws Exception |
| 880 | * @return array |
| 881 | */ |
| 882 | public function getDeniedPermissions(mixed $role, mixed $resource): array |
| 883 | { |
| 884 | return $this->getEffectivePermissions('denied', $role, $resource); |
| 885 | } |
| 886 | |
| 887 | /** |
| 888 | * Shared walk for getAllowedPermissions()/getDeniedPermissions() |
| 889 | * |
| 890 | * @param string $type |
| 891 | * @param mixed $role |
| 892 | * @param mixed $resource |
| 893 | * @throws Exception |
| 894 | * @return array |
| 895 | */ |
| 896 | protected function getEffectivePermissions(string $type, mixed $role, mixed $resource): array |
| 897 | { |
| 898 | $this->verifyRole($role); |
| 899 | $this->verifyResource($resource); |
| 900 | |
| 901 | $resourceName = (string)$this->resources[(string)$resource]; |
| 902 | $roleToCheck = $this->roles[(string)$role]; |
| 903 | $permissions = []; |
| 904 | |
| 905 | while ($roleToCheck !== null) { |
| 906 | $roleRules = $this->{$type}[(string)$roleToCheck] ?? null; |
| 907 | if ($roleRules !== null) { |
| 908 | if (array_key_exists($resourceName, $roleRules)) { |
| 909 | if (count($roleRules[$resourceName]) === 0) { |
| 910 | return ['*']; |
| 911 | } |
| 912 | $permissions = array_merge($permissions, $roleRules[$resourceName]); |
| 913 | } else if (count($roleRules) === 0) { |
| 914 | return ['*']; |
| 915 | } |
| 916 | } |
| 917 | $roleToCheck = $roleToCheck->getParent(); |
| 918 | } |
| 919 | |
| 920 | if (in_array('*', $permissions, true)) { |
| 921 | return ['*']; |
| 922 | } |
| 923 | |
| 924 | return array_values(array_unique($permissions)); |
| 925 | } |
| 926 | |
| 927 | /** |
| 928 | * Create assertion |
| 929 | * |
| 930 | * @param AssertionInterface $assertion |
| 931 | * @param string $type |
| 932 | * @param mixed $role |
| 933 | * @param mixed $resource |
| 934 | * @param ?string $permission |
| 935 | * @throws InvalidArgumentException |
| 936 | * @return void |
| 937 | */ |
| 938 | public function createAssertion( |
| 939 | AssertionInterface $assertion, string $type, mixed $role, mixed $resource = null, ?string $permission = null |
| 940 | ): void |
| 941 | { |
| 942 | $key = $this->generateAssertionKey($role, $resource, $permission); |
| 943 | |
| 944 | if (($type != 'allowed') && ($type != 'denied')) { |
| 945 | throw new InvalidArgumentException("Error: The assertion type must be either 'allowed' or 'denied'."); |
| 946 | } |
| 947 | $this->assertions[$type][$key] = $assertion; |
| 948 | } |
| 949 | |
| 950 | /** |
| 951 | * Delete assertion |
| 952 | * |
| 953 | * @param string $type |
| 954 | * @param mixed $role |
| 955 | * @param mixed $resource |
| 956 | * @param ?string $permission |
| 957 | * @return void |
| 958 | */ |
| 959 | public function deleteAssertion(string $type, mixed $role, mixed $resource = null, ?string $permission = null): void |
| 960 | { |
| 961 | $key = $this->generateAssertionKey($role, $resource, $permission); |
| 962 | |
| 963 | if (isset($this->assertions[$type][$key])) { |
| 964 | unset($this->assertions[$type][$key]); |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | /** |
| 969 | * Delete the assertions for a role/resource's full permission set, |
| 970 | * shared by removeRole() and removeResource() |
| 971 | * |
| 972 | * @param string $type |
| 973 | * @param string $roleName |
| 974 | * @param string $resourceName |
| 975 | * @param array $permissions |
| 976 | * @return void |
| 977 | */ |
| 978 | protected function deleteRuleAssertions(string $type, string $roleName, string $resourceName, array $permissions): void |
| 979 | { |
| 980 | if (count($permissions) === 0) { |
| 981 | $this->deleteAssertion($type, $roleName, $resourceName); |
| 982 | } else { |
| 983 | foreach ($permissions as $perm) { |
| 984 | $this->deleteAssertion($type, $roleName, $resourceName, $perm); |
| 985 | } |
| 986 | } |
| 987 | } |
| 988 | |
| 989 | /** |
| 990 | * Has assertion key |
| 991 | * |
| 992 | * @param string $type |
| 993 | * @param mixed $role |
| 994 | * @param mixed $resource |
| 995 | * @param mixed $permission |
| 996 | * @throws InvalidArgumentException |
| 997 | * @return bool |
| 998 | */ |
| 999 | public function hasAssertionKey(string $type, mixed $role, mixed $resource = null, mixed $permission = null): bool |
| 1000 | { |
| 1001 | return ($this->getAssertionKey($type, $role, $resource, $permission) !== null); |
| 1002 | } |
| 1003 | |
| 1004 | /** |
| 1005 | * Get assertion key |
| 1006 | * |
| 1007 | * @param string $type |
| 1008 | * @param mixed $role |
| 1009 | * @param mixed $resource |
| 1010 | * @param mixed $permission |
| 1011 | * @throws InvalidArgumentException |
| 1012 | * @return string|null |
| 1013 | */ |
| 1014 | public function getAssertionKey(string $type, mixed $role, mixed $resource = null, mixed $permission = null): string|null |
| 1015 | { |
| 1016 | $key = $this->generateAssertionKey($role, $resource, $permission); |
| 1017 | |
| 1018 | if (($type != 'allowed') && ($type != 'denied')) { |
| 1019 | throw new InvalidArgumentException("Error: The assertion type must be either 'allowed' or 'denied'."); |
| 1020 | } |
| 1021 | |
| 1022 | return (isset($this->assertions[$type][$key])) ? $key : null; |
| 1023 | } |
| 1024 | |
| 1025 | /** |
| 1026 | * Add policy |
| 1027 | * |
| 1028 | * @param string $method |
| 1029 | * @param mixed $role |
| 1030 | * @param mixed $resource |
| 1031 | * @return Acl |
| 1032 | */ |
| 1033 | public function addPolicy(string $method, mixed $role, mixed $resource = null): Acl |
| 1034 | { |
| 1035 | $this->policies[] = [ |
| 1036 | 'method' => $method, |
| 1037 | 'role' => $role, |
| 1038 | 'resource' => $resource |
| 1039 | ]; |
| 1040 | |
| 1041 | return $this; |
| 1042 | } |
| 1043 | |
| 1044 | /** |
| 1045 | * Has policies |
| 1046 | * |
| 1047 | * @return bool |
| 1048 | */ |
| 1049 | public function hasPolicies(): bool |
| 1050 | { |
| 1051 | return (count($this->policies) > 0); |
| 1052 | } |
| 1053 | |
| 1054 | /** |
| 1055 | * Evaluate policies |
| 1056 | * |
| 1057 | * @param mixed $role |
| 1058 | * @param mixed $resource |
| 1059 | * @param mixed $permission |
| 1060 | * @throws Exception |
| 1061 | * @throws \Pop\Acl\Policy\Exception if a policy method isn't callable on the role |
| 1062 | * @return bool|null |
| 1063 | */ |
| 1064 | public function evaluatePolicies(mixed $role = null, mixed $resource = null, mixed $permission = null): bool|null |
| 1065 | { |
| 1066 | $result = null; |
| 1067 | |
| 1068 | if (($role === null) && ($resource === null) && ($permission === null)) { |
| 1069 | foreach ($this->policies as $policy) { |
| 1070 | $result = $this->evaluatePolicy($policy['method'], $policy['role'], $policy['resource']); |
| 1071 | if ($result === false) { |
| 1072 | return false; |
| 1073 | } |
| 1074 | } |
| 1075 | } else { |
| 1076 | $policyRole = null; |
| 1077 | $policyResource = null; |
| 1078 | $policyMethod = ($permission !== null) ? $permission : null; |
| 1079 | |
| 1080 | if ($role !== null) { |
| 1081 | $this->verifyRole($role); |
| 1082 | $policyRole = ($role instanceof AclRole) ? $role->getName() : $role; |
| 1083 | } |
| 1084 | if ($resource !== null) { |
| 1085 | $this->verifyResource($resource); |
| 1086 | $policyResource = ($resource instanceof AclResource) ? $resource->getName() : $resource; |
| 1087 | } |
| 1088 | |
| 1089 | foreach ($this->policies as $policy) { |
| 1090 | if ((($policyRole === null) || ($policyRole == $policy['role'])) && |
| 1091 | (($policyResource === null) || ($policyResource == $policy['resource'])) && |
| 1092 | (($policyMethod === null) || ($policyMethod == $policy['method']))) { |
| 1093 | $result = $this->evaluatePolicy($policy['method'], $policy['role'], $policy['resource']); |
| 1094 | if ($result === false) { |
| 1095 | return false; |
| 1096 | } |
| 1097 | } |
| 1098 | } |
| 1099 | } |
| 1100 | |
| 1101 | return $result; |
| 1102 | } |
| 1103 | |
| 1104 | /** |
| 1105 | * Evaluate policy |
| 1106 | * |
| 1107 | * @param string $method |
| 1108 | * @param mixed $role |
| 1109 | * @param mixed $resource |
| 1110 | * @throws Exception |
| 1111 | * @throws \Pop\Acl\Policy\Exception if a policy method isn't callable on the role |
| 1112 | * @return bool|null |
| 1113 | */ |
| 1114 | public function evaluatePolicy(string $method, mixed $role, mixed $resource = null): bool|null |
| 1115 | { |
| 1116 | if (is_string($role) && ($this->verifyRole($role))) { |
| 1117 | $role = $this->roles[(string)$role]; |
| 1118 | } |
| 1119 | |
| 1120 | if (!in_array('Pop\Acl\Policy\PolicyTrait', class_uses($role))) { |
| 1121 | throw new Exception('Error: The role must use Pop\Acl\Policy\PolicyTrait.'); |
| 1122 | } |
| 1123 | |
| 1124 | if ($resource !== null) { |
| 1125 | $this->verifyResource($resource); |
| 1126 | $resource = $this->resources[(string)$resource]; |
| 1127 | } |
| 1128 | |
| 1129 | return $role->can($method, $resource); |
| 1130 | } |
| 1131 | |
| 1132 | /** |
| 1133 | * Verify role |
| 1134 | * |
| 1135 | * @param mixed $role |
| 1136 | * @throws Exception |
| 1137 | * @return bool |
| 1138 | */ |
| 1139 | protected function verifyRole(mixed $role): bool |
| 1140 | { |
| 1141 | if (!is_string($role) && !($role instanceof AclRole)) { |
| 1142 | throw new \InvalidArgumentException('Error: The role must be a string or an instance of Role.'); |
| 1143 | } |
| 1144 | if (!isset($this->roles[(string)$role])) { |
| 1145 | throw new Exception("Error: The role '" . (string)$role . "' has not been added."); |
| 1146 | } |
| 1147 | |
| 1148 | return true; |
| 1149 | } |
| 1150 | |
| 1151 | /** |
| 1152 | * Verify resource |
| 1153 | * |
| 1154 | * @param mixed $resource |
| 1155 | * @throws Exception |
| 1156 | * @return bool |
| 1157 | */ |
| 1158 | protected function verifyResource(mixed $resource): bool |
| 1159 | { |
| 1160 | if (!is_string($resource) && !($resource instanceof AclResource)) { |
| 1161 | throw new \InvalidArgumentException('Error: The resource must be a string or an instance of Resource.'); |
| 1162 | } |
| 1163 | if (!isset($this->resources[(string)$resource])) { |
| 1164 | throw new Exception("Error: The resource '" . (string)$resource . "' has not been added."); |
| 1165 | } |
| 1166 | |
| 1167 | return true; |
| 1168 | } |
| 1169 | |
| 1170 | /** |
| 1171 | * Generate assertion key |
| 1172 | * |
| 1173 | * @param mixed $role |
| 1174 | * @param mixed $resource |
| 1175 | * @param mixed $permission |
| 1176 | * @return string |
| 1177 | */ |
| 1178 | protected function generateAssertionKey(mixed $role, mixed $resource = null, mixed $permission = null): string |
| 1179 | { |
| 1180 | $key = (string)$role; |
| 1181 | |
| 1182 | if ($resource !== null) { |
| 1183 | $key .= '-' . (string)$resource; |
| 1184 | } |
| 1185 | if ($permission !== null) { |
| 1186 | $key .= '-' . (is_array($permission) ? implode(',', $permission) : (string)$permission); |
| 1187 | } |
| 1188 | |
| 1189 | return $key; |
| 1190 | } |
| 1191 | |
| 1192 | /** |
| 1193 | * Traverse child roles to add them to the ACL object |
| 1194 | * |
| 1195 | * @param array $childRoles |
| 1196 | * @return void |
| 1197 | */ |
| 1198 | protected function traverseChildren(array $childRoles): void |
| 1199 | { |
| 1200 | foreach ($childRoles as $childRole) { |
| 1201 | $this->addRole($childRole); |
| 1202 | if ($childRole->hasChildren()) { |
| 1203 | $this->traverseChildren($childRole->getChildren()); |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | } |