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| 1 | <?php |
| 2 | /** |
| 3 | * Pop PHP Framework (http://www.popphp.org/) |
| 4 | * |
| 5 | * @link https://github.com/popphp/popphp-framework |
| 6 | * @author Nick Sagona, III <dev@nolainteractive.com> |
| 7 | * @copyright Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
| 8 | * @license http://www.popphp.org/license New BSD License |
| 9 | */ |
| 10 | |
| 11 | /** |
| 12 | * @namespace |
| 13 | */ |
| 14 | namespace Pop\Acl; |
| 15 | |
| 16 | use Pop\Acl\Assertion\AssertionInterface; |
| 17 | use InvalidArgumentException; |
| 18 | |
| 19 | /** |
| 20 | * ACL class |
| 21 | * |
| 22 | * @category Pop |
| 23 | * @package Pop\Acl |
| 24 | * @author Nick Sagona, III <dev@nolainteractive.com> |
| 25 | * @copyright Copyright (c) 2009-2024 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
| 26 | * @license http://www.popphp.org/license New BSD License |
| 27 | * @version 4.0.0 |
| 28 | */ |
| 29 | class Acl |
| 30 | { |
| 31 | |
| 32 | /** |
| 33 | * Array of roles |
| 34 | * @var array |
| 35 | */ |
| 36 | protected array $roles = []; |
| 37 | |
| 38 | /** |
| 39 | * Array of resources |
| 40 | * @var array |
| 41 | */ |
| 42 | protected array $resources = []; |
| 43 | |
| 44 | /** |
| 45 | * Array of allowed roles, resources and permissions |
| 46 | * @var array |
| 47 | */ |
| 48 | protected array $allowed = []; |
| 49 | |
| 50 | /** |
| 51 | * Array of denied roles, resources and permissions |
| 52 | * @var array |
| 53 | */ |
| 54 | protected array $denied = []; |
| 55 | |
| 56 | /** |
| 57 | * Array of assertions |
| 58 | * @var array |
| 59 | */ |
| 60 | protected array $assertions = [ |
| 61 | 'allowed' => [], |
| 62 | 'denied' => [] |
| 63 | ]; |
| 64 | |
| 65 | /** |
| 66 | * Array of policies |
| 67 | * @var array |
| 68 | */ |
| 69 | protected array $policies = []; |
| 70 | |
| 71 | /** |
| 72 | * Strict flag |
| 73 | * @var bool |
| 74 | */ |
| 75 | protected bool $strict = false; |
| 76 | |
| 77 | /** |
| 78 | * Multi strict flag |
| 79 | * @var bool |
| 80 | */ |
| 81 | protected bool $multiStrict = false; |
| 82 | |
| 83 | /** |
| 84 | * Parent strict flag |
| 85 | * @var bool |
| 86 | */ |
| 87 | protected bool $parentStrict = false; |
| 88 | |
| 89 | /** |
| 90 | * Constructor |
| 91 | * |
| 92 | * Instantiate the ACL object |
| 93 | */ |
| 94 | public function __construct() |
| 95 | { |
| 96 | $args = func_get_args(); |
| 97 | |
| 98 | foreach ($args as $arg) { |
| 99 | if (is_array($arg)) { |
| 100 | foreach ($arg as $a) { |
| 101 | if ($a instanceof AclRole) { |
| 102 | $this->addRole($a); |
| 103 | } else if ($a instanceof AclResource) { |
| 104 | $this->addResource($a); |
| 105 | } |
| 106 | } |
| 107 | } else if ($arg instanceof AclRole) { |
| 108 | $this->addRole($arg); |
| 109 | } else if ($arg instanceof AclResource) { |
| 110 | $this->addResource($arg); |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * Get a role |
| 117 | * |
| 118 | * @param string $role |
| 119 | * @return AclRole|null |
| 120 | */ |
| 121 | public function getRole(string $role): AclRole|null |
| 122 | { |
| 123 | return $this->roles[$role] ?? null; |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Get roles |
| 128 | * |
| 129 | * @return array |
| 130 | */ |
| 131 | public function getRoles(): array |
| 132 | { |
| 133 | return $this->roles; |
| 134 | } |
| 135 | |
| 136 | /** |
| 137 | * See if a role has been added |
| 138 | * |
| 139 | * @param string $role |
| 140 | * @return bool |
| 141 | */ |
| 142 | public function hasRole(string $role): bool |
| 143 | { |
| 144 | return (isset($this->roles[$role])); |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Add a role |
| 149 | * |
| 150 | * @param AclRole $role |
| 151 | * @return Acl |
| 152 | */ |
| 153 | public function addRole(AclRole $role): Acl |
| 154 | { |
| 155 | if (!isset($this->roles[$role->getName()])) { |
| 156 | $this->roles[$role->getName()] = $role; |
| 157 | |
| 158 | // Traverse up if role has parents |
| 159 | while ($role->hasParent()) { |
| 160 | $role = $role->getParent(); |
| 161 | $this->roles[$role->getName()] = $role; |
| 162 | } |
| 163 | |
| 164 | // Traverse down if the role has children |
| 165 | if ($role->hasChildren()) { |
| 166 | $this->traverseChildren($role->getChildren()); |
| 167 | } |
| 168 | } |
| 169 | return $this; |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Add roles |
| 174 | * |
| 175 | * @param array $roles |
| 176 | * @return Acl |
| 177 | */ |
| 178 | public function addRoles(array $roles): Acl |
| 179 | { |
| 180 | foreach ($roles as $role) { |
| 181 | $this->addRole($role); |
| 182 | } |
| 183 | |
| 184 | return $this; |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Get a resource |
| 189 | * |
| 190 | * @param string $resource |
| 191 | * @return AclResource|null |
| 192 | */ |
| 193 | public function getResource(string $resource): AclResource|null |
| 194 | { |
| 195 | return $this->resources[$resource] ?? null; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * See if a resource has been added |
| 200 | * |
| 201 | * @param string $resource |
| 202 | * @return bool |
| 203 | */ |
| 204 | public function hasResource(string $resource): bool |
| 205 | { |
| 206 | return (isset($this->resources[$resource])); |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Add a resource |
| 211 | * |
| 212 | * @param AclResource $resource |
| 213 | * @return Acl |
| 214 | */ |
| 215 | public function addResource(AclResource $resource): Acl |
| 216 | { |
| 217 | $this->resources[$resource->getName()] = $resource; |
| 218 | return $this; |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Get resources |
| 223 | * |
| 224 | * @return array |
| 225 | */ |
| 226 | public function getResources(): array |
| 227 | { |
| 228 | return $this->resources; |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Add resources |
| 233 | * |
| 234 | * @param array $resources |
| 235 | * @return Acl |
| 236 | */ |
| 237 | public function addResources(array $resources): Acl |
| 238 | { |
| 239 | foreach ($resources as $resource) { |
| 240 | $this->addResource($resource); |
| 241 | } |
| 242 | |
| 243 | return $this; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Set strict |
| 248 | * |
| 249 | * @param bool $strict |
| 250 | * @param bool|null $multiStrict |
| 251 | * @return Acl |
| 252 | */ |
| 253 | public function setStrict(bool $strict = true, bool|null $multiStrict = null): Acl |
| 254 | { |
| 255 | $this->strict = $strict; |
| 256 | if ($multiStrict !== null) { |
| 257 | $this->multiStrict = $multiStrict; |
| 258 | } |
| 259 | return $this; |
| 260 | } |
| 261 | |
| 262 | /** |
| 263 | * See if ACL object is set to strict |
| 264 | * |
| 265 | * @return bool |
| 266 | */ |
| 267 | public function isStrict(): bool |
| 268 | { |
| 269 | return $this->strict; |
| 270 | } |
| 271 | |
| 272 | /** |
| 273 | * Set multi strict |
| 274 | * |
| 275 | * @param bool $multiStrict |
| 276 | * @return Acl |
| 277 | */ |
| 278 | public function setMultiStrict(bool $multiStrict = true): Acl |
| 279 | { |
| 280 | $this->multiStrict = $multiStrict; |
| 281 | return $this; |
| 282 | } |
| 283 | |
| 284 | /** |
| 285 | * See if ACL object is set to multi strict |
| 286 | * |
| 287 | * @return bool |
| 288 | */ |
| 289 | public function isMultiStrict(): bool |
| 290 | { |
| 291 | return $this->multiStrict; |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * Set parent strict |
| 296 | * |
| 297 | * @param bool $parentStrict |
| 298 | * @return Acl |
| 299 | */ |
| 300 | public function setParentStrict(bool $parentStrict = true): Acl |
| 301 | { |
| 302 | $this->parentStrict = $parentStrict; |
| 303 | return $this; |
| 304 | } |
| 305 | |
| 306 | /** |
| 307 | * See if ACL object is set to parent strict |
| 308 | * |
| 309 | * @return bool |
| 310 | */ |
| 311 | public function isParentStrict(): bool |
| 312 | { |
| 313 | return $this->parentStrict; |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * Allow a role permission to a resource or resources |
| 318 | * |
| 319 | * @param mixed $role |
| 320 | * @param mixed $resource |
| 321 | * @param mixed $permission |
| 322 | * @param ?AssertionInterface $assertion |
| 323 | * @throws Exception |
| 324 | * @return Acl |
| 325 | */ |
| 326 | public function allow( |
| 327 | mixed $role, mixed $resource = null, mixed $permission = null, ?AssertionInterface $assertion = null |
| 328 | ): Acl |
| 329 | { |
| 330 | if ($this->verifyRole($role)) { |
| 331 | $role = $this->roles[(string)$role]; |
| 332 | |
| 333 | if (!isset($this->allowed[(string)$role])) { |
| 334 | $this->allowed[(string)$role] = []; |
| 335 | } |
| 336 | |
| 337 | if (($resource !== null) && ($this->verifyResource($resource))) { |
| 338 | $resource = $this->resources[(string)$resource]; |
| 339 | |
| 340 | if (!isset($this->allowed[(string)$role][(string)$resource])) { |
| 341 | $this->allowed[(string)$role][(string)$resource] = []; |
| 342 | } |
| 343 | if ($permission !== null) { |
| 344 | if (!is_array($permission)) { |
| 345 | $permission = [$permission]; |
| 346 | } |
| 347 | foreach ($permission as $perm) { |
| 348 | $this->allowed[(string)$role][(string)$resource][] = $perm; |
| 349 | if ($assertion !== null) { |
| 350 | $this->createAssertion($assertion, 'allowed', $role, $resource, $perm); |
| 351 | } |
| 352 | } |
| 353 | } else { |
| 354 | if ($assertion !== null) { |
| 355 | $this->createAssertion($assertion, 'allowed', $role, $resource); |
| 356 | } |
| 357 | } |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | return $this; |
| 362 | } |
| 363 | |
| 364 | /** |
| 365 | * Remove an allow rule |
| 366 | * |
| 367 | * @param mixed $role |
| 368 | * @param mixed $resource |
| 369 | * @param mixed $permission |
| 370 | * @throws Exception |
| 371 | * @return Acl |
| 372 | */ |
| 373 | public function removeAllowRule(mixed $role, mixed $resource = null, mixed $permission = null): Acl |
| 374 | { |
| 375 | if (($this->verifyRole($role)) && isset($this->allowed[(string)$role])) { |
| 376 | // If only role passed |
| 377 | if (($resource === null) && ($permission === null)) { |
| 378 | unset($this->allowed[(string)$role]); |
| 379 | $this->deleteAssertion('allowed', $role); |
| 380 | // If role & resource passed |
| 381 | } else if (($resource !== null) && ($permission === null) && ($this->verifyResource($resource)) && |
| 382 | isset($this->allowed[(string)$role][(string)$resource])) { |
| 383 | unset($this->allowed[(string)$role][(string)$resource]); |
| 384 | $this->deleteAssertion('allowed', $role, $resource); |
| 385 | // If role, resource & permission passed |
| 386 | } else { |
| 387 | if (!is_array($permission)) { |
| 388 | $permission = [$permission]; |
| 389 | } |
| 390 | foreach ($permission as $perm) { |
| 391 | if (($this->verifyResource($resource)) && isset($this->allowed[(string)$role][(string)$resource]) && |
| 392 | in_array($perm, $this->allowed[(string)$role][(string)$resource])) { |
| 393 | $key = array_search($perm, $this->allowed[(string)$role][(string)$resource]); |
| 394 | unset($this->allowed[(string)$role][(string)$resource][$key]); |
| 395 | } |
| 396 | $this->deleteAssertion('allowed', $role, $resource, $perm); |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | return $this; |
| 402 | } |
| 403 | |
| 404 | /** |
| 405 | * Deny a role permission to a resource or resources |
| 406 | * |
| 407 | * @param mixed $role |
| 408 | * @param mixed $resource |
| 409 | * @param mixed $permission |
| 410 | * @param ?AssertionInterface $assertion |
| 411 | * @throws Exception |
| 412 | * @return Acl |
| 413 | */ |
| 414 | public function deny( |
| 415 | mixed $role, mixed $resource = null, mixed $permission = null, ?AssertionInterface $assertion = null |
| 416 | ): Acl |
| 417 | { |
| 418 | if ($this->verifyRole($role)) { |
| 419 | $role = $this->roles[(string)$role]; |
| 420 | |
| 421 | if (!isset($this->denied[(string)$role])) { |
| 422 | $this->denied[(string)$role] = []; |
| 423 | } |
| 424 | |
| 425 | if (($resource !== null) && ($this->verifyResource($resource))) { |
| 426 | $resource = $this->resources[(string)$resource]; |
| 427 | |
| 428 | if (!isset($this->denied[(string)$role][(string)$resource])) { |
| 429 | $this->denied[(string)$role][(string)$resource] = []; |
| 430 | } |
| 431 | if ($permission !== null) { |
| 432 | if (!is_array($permission)) { |
| 433 | $permission = [$permission]; |
| 434 | } |
| 435 | foreach ($permission as $perm) { |
| 436 | $this->denied[(string)$role][(string)$resource][] = $perm; |
| 437 | if ($assertion !== null) { |
| 438 | $this->createAssertion($assertion, 'denied', $role, $resource, $perm); |
| 439 | } |
| 440 | } |
| 441 | } else { |
| 442 | if ($assertion !== null) { |
| 443 | $this->createAssertion($assertion, 'denied', $role, $resource); |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | return $this; |
| 450 | } |
| 451 | |
| 452 | /** |
| 453 | * Remove a deny rule |
| 454 | * |
| 455 | * @param mixed $role |
| 456 | * @param mixed $resource |
| 457 | * @param mixed $permission |
| 458 | * @throws Exception |
| 459 | * @return Acl |
| 460 | */ |
| 461 | public function removeDenyRule(mixed $role, mixed $resource = null, mixed $permission = null): Acl |
| 462 | { |
| 463 | if (($this->verifyRole($role)) && isset($this->denied[(string)$role])) { |
| 464 | // If only role passed |
| 465 | if (($resource === null) && ($permission === null)) { |
| 466 | unset($this->denied[(string)$role]); |
| 467 | $this->deleteAssertion('denied', $role); |
| 468 | // If role & resource passed |
| 469 | } else if (($resource !== null) && ($permission === null) && ($this->verifyResource($resource)) && |
| 470 | isset($this->denied[(string)$role][(string)$resource])) { |
| 471 | unset($this->denied[(string)$role][(string)$resource]); |
| 472 | $this->deleteAssertion('denied', $role, $resource); |
| 473 | // If role, resource & permission passed |
| 474 | } else { |
| 475 | if (!is_array($permission)) { |
| 476 | $permission = [$permission]; |
| 477 | } |
| 478 | foreach ($permission as $perm) { |
| 479 | if (($this->verifyResource($resource)) && isset($this->denied[(string)$role][(string)$resource]) && |
| 480 | in_array($perm, $this->denied[(string)$role][(string)$resource])) { |
| 481 | $key = array_search($perm, $this->denied[(string)$role][(string)$resource]); |
| 482 | unset($this->denied[(string)$role][(string)$resource][$key]); |
| 483 | } |
| 484 | $this->deleteAssertion('denied', $role, $resource, $perm); |
| 485 | } |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | return $this; |
| 490 | } |
| 491 | |
| 492 | /** |
| 493 | * Determine if the role is allowed |
| 494 | * |
| 495 | * @param mixed $role |
| 496 | * @param mixed $resource |
| 497 | * @param mixed $permission |
| 498 | * @throws Exception |
| 499 | * @return bool |
| 500 | */ |
| 501 | public function isAllowed(mixed $role, mixed $resource = null, mixed $permission = null): bool |
| 502 | { |
| 503 | $result = false; |
| 504 | $isParent = false; |
| 505 | |
| 506 | if ($this->verifyRole($role)) { |
| 507 | if ($resource !== null) { |
| 508 | $this->verifyResource($resource); |
| 509 | } |
| 510 | |
| 511 | // If is not denied |
| 512 | if (!$this->isDenied($role, $resource, $permission)) { |
| 513 | // If not strict, pass |
| 514 | if ((!$this->strict) && (!$this->multiStrict)) { |
| 515 | $result = true; |
| 516 | // If strict, check for explicit allow rule |
| 517 | } else { |
| 518 | $roleToCheck = $this->roles[(string)$role]; |
| 519 | while ($roleToCheck !== null) { |
| 520 | if (isset($this->allowed[(string)$roleToCheck])) { |
| 521 | // No explicit resources or permissions |
| 522 | if (count($this->allowed[(string)$roleToCheck]) == 0) { |
| 523 | $result = true; |
| 524 | // Resource set, but no explicit permissions |
| 525 | } else if (($resource !== null) && isset($this->allowed[(string)$roleToCheck][(string)$resource]) && |
| 526 | (count($this->allowed[(string)$roleToCheck][(string)$resource]) == 0)) { |
| 527 | $result = true; |
| 528 | // Else, has resource and permissions set |
| 529 | } else if (($resource !== null) && ($permission !== null) && |
| 530 | isset($this->allowed[(string)$roleToCheck][(string)$resource]) && |
| 531 | (count($this->allowed[(string)$roleToCheck][(string)$resource]) > 0)) { |
| 532 | $permissionsToCheck = (!is_array($permission)) ? [$permission] : $permission; |
| 533 | $allowedPermissions = $this->allowed[(string)$roleToCheck][(string)$resource]; |
| 534 | $permissions = array_intersect($permissionsToCheck, $allowedPermissions); |
| 535 | |
| 536 | $result = ((($isParent) && (!$this->parentStrict)) || |
| 537 | (count($permissions) == count($permissionsToCheck))); |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | // Traverse up through the parent roles |
| 542 | $roleToCheck = $roleToCheck->getParent(); |
| 543 | $isParent = true; |
| 544 | } |
| 545 | } |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | // Check for assertions |
| 550 | if (($result) && ($this->hasAssertionKey('allowed', $role, $resource, $permission))) { |
| 551 | $assertionKey = $this->getAssertionKey('allowed', $role, $resource, $permission); |
| 552 | $assertionRole = $this->roles[(string)$role]; |
| 553 | $assertionResource = ($resource !== null) ? $this->resources[(string)$resource] : null; |
| 554 | $result = |
| 555 | $this->assertions['allowed'][$assertionKey]->assert($this, $assertionRole, $assertionResource, $permission); |
| 556 | } |
| 557 | |
| 558 | // Check for policies |
| 559 | if ($this->hasPolicies()) { |
| 560 | $result = $this->evaluatePolicies($role, $resource, $permission); |
| 561 | } |
| 562 | |
| 563 | return $result; |
| 564 | } |
| 565 | |
| 566 | /** |
| 567 | * Determine if multiple roles are allowed |
| 568 | * |
| 569 | * @param array $roles |
| 570 | * @param mixed $resource |
| 571 | * @param mixed $permission |
| 572 | * @throws Exception |
| 573 | * @return bool |
| 574 | */ |
| 575 | public function isAllowedMulti(array $roles, mixed $resource = null, mixed $permission = null): bool |
| 576 | { |
| 577 | // If strict, all roles must be allowed |
| 578 | if ($this->multiStrict) { |
| 579 | $result = true; |
| 580 | foreach ($roles as $role) { |
| 581 | if (!$this->isAllowed($role, $resource, $permission)) { |
| 582 | $result = false; |
| 583 | break; |
| 584 | } |
| 585 | } |
| 586 | // Else, evaluate loosely |
| 587 | } else { |
| 588 | // Check for any explicitly set denied rules for any of the roles |
| 589 | foreach ($roles as $role) { |
| 590 | if ($this->isDenied($role, $resource, $permission)) { |
| 591 | return false; |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | // Else, evaluate if any of the roles are allowed |
| 596 | $result = false; |
| 597 | foreach ($roles as $role) { |
| 598 | if ($this->isAllowed($role, $resource, $permission)) { |
| 599 | $result = true; |
| 600 | break; |
| 601 | } |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | return $result; |
| 606 | } |
| 607 | |
| 608 | /** |
| 609 | * Determine if multiple roles are allowed using the strict parameter |
| 610 | * All of the roles must be allowed to return true, otherwise it will return false |
| 611 | * |
| 612 | * @param array $roles |
| 613 | * @param mixed $resource |
| 614 | * @param mixed $permission |
| 615 | * @throws Exception |
| 616 | * @return bool |
| 617 | */ |
| 618 | public function isAllowedMultiStrict(array $roles, mixed $resource = null, mixed $permission = null): bool |
| 619 | { |
| 620 | $this->multiStrict = true; |
| 621 | return $this->isAllowedMulti($roles, $resource, $permission); |
| 622 | } |
| 623 | |
| 624 | /** |
| 625 | * Determine if a role is denied |
| 626 | * |
| 627 | * @param mixed $role |
| 628 | * @param mixed $resource |
| 629 | * @param mixed $permission |
| 630 | * @throws Exception |
| 631 | * @return bool |
| 632 | */ |
| 633 | public function isDenied(mixed $role, mixed $resource = null, mixed $permission = null): bool |
| 634 | { |
| 635 | $result = false; |
| 636 | |
| 637 | if ($this->verifyRole($role)) { |
| 638 | if ($resource !== null) { |
| 639 | $this->verifyResource($resource); |
| 640 | } |
| 641 | |
| 642 | // Check if the user, resource and/or permission is denied |
| 643 | $roleToCheck = $this->roles[(string)$role]; |
| 644 | while ($roleToCheck !== null) { |
| 645 | if (isset($this->denied[(string)$roleToCheck])) { |
| 646 | if (count($this->denied[(string)$roleToCheck]) > 0) { |
| 647 | if (($resource !== null) && array_key_exists((string)$resource, $this->denied[(string)$roleToCheck])) { |
| 648 | if (count($this->denied[(string)$roleToCheck][(string)$resource]) > 0) { |
| 649 | if ($permission !== null) { |
| 650 | $permissions = (!is_array($permission)) ? [$permission] : $permission; |
| 651 | foreach ($permissions as $p) { |
| 652 | if (in_array($p, $this->denied[(string)$roleToCheck][(string)$resource])) { |
| 653 | $result = true; |
| 654 | } |
| 655 | } |
| 656 | } |
| 657 | } else { |
| 658 | $result = true; |
| 659 | } |
| 660 | } |
| 661 | } else { |
| 662 | $result = true; |
| 663 | } |
| 664 | } |
| 665 | $roleToCheck = $roleToCheck->getParent(); |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | // Check for assertions |
| 670 | if ($this->hasAssertionKey('denied', $role, $resource, $permission)) { |
| 671 | $assertionKey = $this->getAssertionKey('denied', $role, $resource, $permission); |
| 672 | $assertionRole = $this->roles[(string)$role]; |
| 673 | $assertionResource = ($resource !== null) ? $this->resources[(string)$resource] : null; |
| 674 | $result = |
| 675 | $this->assertions['denied'][$assertionKey]->assert($this, $assertionRole, $assertionResource, $permission); |
| 676 | } |
| 677 | |
| 678 | // Check for policies |
| 679 | if ($this->hasPolicies()) { |
| 680 | $result = (!$this->evaluatePolicies($role, $resource, $permission)); |
| 681 | } |
| 682 | |
| 683 | return $result; |
| 684 | } |
| 685 | |
| 686 | /** |
| 687 | * Determine if multiple roles are denied |
| 688 | * |
| 689 | * @param array $roles |
| 690 | * @param mixed $resource |
| 691 | * @param mixed $permission |
| 692 | * @throws Exception |
| 693 | * @return bool |
| 694 | */ |
| 695 | public function isDeniedMulti(array $roles, mixed $resource = null, mixed $permission = null): bool |
| 696 | { |
| 697 | // If strict, all roles must be denied |
| 698 | if ($this->multiStrict) { |
| 699 | $result = true; |
| 700 | foreach ($roles as $role) { |
| 701 | if (!$this->isDenied($role, $resource, $permission)) { |
| 702 | $result = false; |
| 703 | break; |
| 704 | } |
| 705 | } |
| 706 | // Else, evaluate loosely |
| 707 | } else { |
| 708 | // Else, evaluate if any of the roles are denied |
| 709 | $result = false; |
| 710 | foreach ($roles as $role) { |
| 711 | if ($this->isDenied($role, $resource, $permission)) { |
| 712 | $result = true; |
| 713 | break; |
| 714 | } |
| 715 | } |
| 716 | } |
| 717 | |
| 718 | return $result; |
| 719 | } |
| 720 | |
| 721 | /** |
| 722 | * Determine if multiple roles are denied using the strict parameter |
| 723 | * All of the roles must be denied to return true, otherwise it will return false |
| 724 | * |
| 725 | * @param array $roles |
| 726 | * @param mixed $resource |
| 727 | * @param mixed $permission |
| 728 | * @return bool |
| 729 | *@throws Exception |
| 730 | */ |
| 731 | public function isDeniedMultiStrict(array $roles, mixed $resource = null, mixed $permission = null): bool |
| 732 | { |
| 733 | $this->multiStrict = true; |
| 734 | return $this->isDeniedMulti($roles, $resource, $permission); |
| 735 | } |
| 736 | |
| 737 | /** |
| 738 | * Create assertion |
| 739 | * |
| 740 | * @param AssertionInterface $assertion |
| 741 | * @param string $type |
| 742 | * @param mixed $role |
| 743 | * @param mixed $resource |
| 744 | * @param ?string $permission |
| 745 | * @throws InvalidArgumentException |
| 746 | * @return void |
| 747 | */ |
| 748 | public function createAssertion( |
| 749 | AssertionInterface $assertion, string $type, mixed $role, mixed $resource = null, ?string $permission = null |
| 750 | ): void |
| 751 | { |
| 752 | $key = $this->generateAssertionKey($role, $resource, $permission); |
| 753 | |
| 754 | if (($type != 'allowed') && ($type != 'denied')) { |
| 755 | throw new InvalidArgumentException("Error: The assertion type must be either 'allowed' or 'denied'."); |
| 756 | } |
| 757 | $this->assertions[$type][$key] = $assertion; |
| 758 | } |
| 759 | |
| 760 | /** |
| 761 | * Delete assertion |
| 762 | * |
| 763 | * @param string $type |
| 764 | * @param mixed $role |
| 765 | * @param mixed $resource |
| 766 | * @param ?string $permission |
| 767 | * @return void |
| 768 | */ |
| 769 | public function deleteAssertion(string $type, mixed $role, mixed $resource = null, ?string $permission = null): void |
| 770 | { |
| 771 | $key = $this->generateAssertionKey($role, $resource, $permission); |
| 772 | |
| 773 | if (isset($this->assertions[$type][$key])) { |
| 774 | unset($this->assertions[$type][$key]); |
| 775 | } |
| 776 | } |
| 777 | |
| 778 | /** |
| 779 | * Has assertion key |
| 780 | * |
| 781 | * @param string $type |
| 782 | * @param mixed $role |
| 783 | * @param mixed $resource |
| 784 | * @param ?string $permission |
| 785 | * @throws InvalidArgumentException |
| 786 | * @return bool |
| 787 | */ |
| 788 | public function hasAssertionKey(string $type, mixed $role, mixed $resource = null, ?string $permission = null): bool |
| 789 | { |
| 790 | $key = $this->generateAssertionKey($role, $resource, $permission); |
| 791 | |
| 792 | if (($type != 'allowed') && ($type != 'denied')) { |
| 793 | throw new InvalidArgumentException("Error: The assertion type must be either 'allowed' or 'denied'."); |
| 794 | } |
| 795 | |
| 796 | return (isset($this->assertions[$type][$key])); |
| 797 | } |
| 798 | |
| 799 | /** |
| 800 | * Get assertion key |
| 801 | * |
| 802 | * @param string $type |
| 803 | * @param mixed $role |
| 804 | * @param mixed $resource |
| 805 | * @param ?string $permission |
| 806 | * @throws InvalidArgumentException |
| 807 | * @return string|null |
| 808 | */ |
| 809 | public function getAssertionKey(string $type, mixed $role, mixed $resource = null, ?string $permission = null): string|null |
| 810 | { |
| 811 | $key = $this->generateAssertionKey($role, $resource, $permission); |
| 812 | |
| 813 | if (($type != 'allowed') && ($type != 'denied')) { |
| 814 | throw new InvalidArgumentException("Error: The assertion type must be either 'allowed' or 'denied'."); |
| 815 | } |
| 816 | |
| 817 | return (isset($this->assertions[$type][$key])) ? $key : null; |
| 818 | } |
| 819 | |
| 820 | /** |
| 821 | * Add policy |
| 822 | * |
| 823 | * @param string $method |
| 824 | * @param mixed $role |
| 825 | * @param mixed $resource |
| 826 | * @return Acl |
| 827 | */ |
| 828 | public function addPolicy(string $method, mixed $role, mixed $resource = null): Acl |
| 829 | { |
| 830 | $this->policies[] = [ |
| 831 | 'method' => $method, |
| 832 | 'role' => $role, |
| 833 | 'resource' => $resource |
| 834 | ]; |
| 835 | |
| 836 | return $this; |
| 837 | } |
| 838 | |
| 839 | /** |
| 840 | * Has policies |
| 841 | * |
| 842 | * @return bool |
| 843 | */ |
| 844 | public function hasPolicies(): bool |
| 845 | { |
| 846 | return (count($this->policies) > 0); |
| 847 | } |
| 848 | |
| 849 | /** |
| 850 | * Evaluate policies |
| 851 | * |
| 852 | * @param mixed $role |
| 853 | * @param mixed $resource |
| 854 | * @param mixed $permission |
| 855 | * @throws Exception |
| 856 | * @return bool|null |
| 857 | */ |
| 858 | public function evaluatePolicies(mixed $role = null, mixed $resource = null, mixed $permission = null): bool|null |
| 859 | { |
| 860 | $result = null; |
| 861 | |
| 862 | if (($role === null) && ($resource === null) && ($permission === null)) { |
| 863 | foreach ($this->policies as $policy) { |
| 864 | $result = $this->evaluatePolicy($policy['method'], $policy['role'], $policy['resource']); |
| 865 | if ($result === false) { |
| 866 | return false; |
| 867 | } |
| 868 | } |
| 869 | } else { |
| 870 | $policyRole = null; |
| 871 | $policyResource = null; |
| 872 | $policyMethod = ($permission !== null) ? $permission : null; |
| 873 | |
| 874 | if ($role !== null) { |
| 875 | $this->verifyRole($role); |
| 876 | $policyRole = ($role instanceof AclRole) ? $role->getName() : $role; |
| 877 | } |
| 878 | if ($resource !== null) { |
| 879 | $this->verifyResource($resource); |
| 880 | $policyResource = ($resource instanceof AclResource) ? $resource->getName() : $resource; |
| 881 | } |
| 882 | |
| 883 | foreach ($this->policies as $policy) { |
| 884 | if ((($policyRole === null) || ($policyRole == $policy['role'])) && |
| 885 | (($policyResource === null) || ($policyResource == $policy['resource'])) && |
| 886 | (($policyMethod === null) || ($policyMethod == $policy['method']))) { |
| 887 | $result = $this->evaluatePolicy($policy['method'], $policy['role'], $policy['resource']); |
| 888 | if ($result === false) { |
| 889 | return false; |
| 890 | } |
| 891 | } |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | return $result; |
| 896 | } |
| 897 | |
| 898 | /** |
| 899 | * Evaluate policy |
| 900 | * |
| 901 | * @param string $method |
| 902 | * @param mixed $role |
| 903 | * @param mixed $resource |
| 904 | * @throws Exception |
| 905 | * @return bool|null |
| 906 | */ |
| 907 | public function evaluatePolicy(string $method, mixed $role, mixed $resource = null): bool|null |
| 908 | { |
| 909 | if (is_string($role) && ($this->verifyRole($role))) { |
| 910 | $role = $this->roles[(string)$role]; |
| 911 | } |
| 912 | |
| 913 | if (!in_array('Pop\Acl\Policy\PolicyTrait', class_uses($role))) { |
| 914 | throw new Exception('Error: The role must use Pop\Acl\Policy\PolicyTrait.'); |
| 915 | } |
| 916 | |
| 917 | if ($resource !== null) { |
| 918 | $this->verifyResource($resource); |
| 919 | $resource = $this->resources[(string)$resource]; |
| 920 | } |
| 921 | |
| 922 | return $role->can($method, $resource); |
| 923 | } |
| 924 | |
| 925 | /** |
| 926 | * Verify role |
| 927 | * |
| 928 | * @param mixed $role |
| 929 | * @throws Exception |
| 930 | * @return bool |
| 931 | */ |
| 932 | protected function verifyRole(mixed $role): bool |
| 933 | { |
| 934 | if (!is_string($role) && !($role instanceof AclRole)) { |
| 935 | throw new \InvalidArgumentException('Error: The role must be a string or an instance of Role.'); |
| 936 | } |
| 937 | if (!isset($this->roles[(string)$role])) { |
| 938 | throw new Exception("Error: The role '" . (string)$role . "' has not been added."); |
| 939 | } |
| 940 | |
| 941 | return true; |
| 942 | } |
| 943 | |
| 944 | /** |
| 945 | * Verify resource |
| 946 | * |
| 947 | * @param mixed $resource |
| 948 | * @throws Exception |
| 949 | * @return bool |
| 950 | */ |
| 951 | protected function verifyResource(mixed $resource): bool |
| 952 | { |
| 953 | if (!is_string($resource) && !($resource instanceof AclResource)) { |
| 954 | throw new \InvalidArgumentException('Error: The resource must be a string or an instance of Resource.'); |
| 955 | } |
| 956 | if (!isset($this->resources[(string)$resource])) { |
| 957 | throw new Exception("Error: The resource '" . (string)$resource . "' has not been added."); |
| 958 | } |
| 959 | |
| 960 | return true; |
| 961 | } |
| 962 | |
| 963 | /** |
| 964 | * Generate assertion key |
| 965 | * |
| 966 | * @param mixed $role |
| 967 | * @param mixed $resource |
| 968 | * @param ?string $permission |
| 969 | * @return string |
| 970 | */ |
| 971 | protected function generateAssertionKey(mixed $role, mixed $resource = null, ?string $permission = null): string |
| 972 | { |
| 973 | $key = (string)$role; |
| 974 | |
| 975 | if ($resource !== null) { |
| 976 | $key .= '-' . (string)$resource; |
| 977 | } |
| 978 | if ($permission !== null) { |
| 979 | $key .= '-' . (string)$permission; |
| 980 | } |
| 981 | |
| 982 | return $key; |
| 983 | } |
| 984 | |
| 985 | /** |
| 986 | * Traverse child roles to add them to the ACL object |
| 987 | * |
| 988 | * @param array $childRoles |
| 989 | * @return void |
| 990 | */ |
| 991 | protected function traverseChildren(array $childRoles): void |
| 992 | { |
| 993 | foreach ($childRoles as $childRole) { |
| 994 | $this->addRole($childRole); |
| 995 | if ($childRole->hasChildren()) { |
| 996 | $this->traverseChildren($childRole->getChildren()); |
| 997 | } |
| 998 | } |
| 999 | } |
| 1000 | |
| 1001 | } |