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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Acl
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Acl.php 18951 2009-11-12 16:26:19Z alexander $
*/
/**
* @see Zend_Acl_Resource_Interface
*/
require_once 'Zend/Acl/Resource/Interface.php';
/**
* @see Zend_Acl_Role_Registry
*/
require_once 'Zend/Acl/Role/Registry.php';
/**
* @see Zend_Acl_Assert_Interface
*/
require_once 'Zend/Acl/Assert/Interface.php';
/**
* @category Zend
* @package Zend_Acl
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Acl
{
/**
* Rule type: allow
*/
const TYPE_ALLOW = 'TYPE_ALLOW';
/**
* Rule type: deny
*/
const TYPE_DENY = 'TYPE_DENY';
/**
* Rule operation: add
*/
const OP_ADD = 'OP_ADD';
/**
* Rule operation: remove
*/
const OP_REMOVE = 'OP_REMOVE';
/**
* Role registry
*
* @var Zend_Acl_Role_Registry
*/
protected $_roleRegistry = null;
/**
* Resource tree
*
* @var array
*/
protected $_resources = array();
/**
* @var Zend_Acl_Role_Interface
*/
protected $_isAllowedRole = null;
/**
* @var Zend_Acl_Resource_Interface
*/
protected $_isAllowedResource = null;
/**
* ACL rules; whitelist (deny everything to all) by default
*
* @var array
*/
protected $_rules = array(
'allResources' => array(
'allRoles' => array(
'allPrivileges' => array(
'type' => self::TYPE_DENY,
'assert' => null
),
'byPrivilegeId' => array()
),
'byRoleId' => array()
),
'byResourceId' => array()
);
/**
* Adds a Role having an identifier unique to the registry
*
* The $parents parameter may be a reference to, or the string identifier for,
* a Role existing in the registry, or $parents may be passed as an array of
* these - mixing string identifiers and objects is ok - to indicate the Roles
* from which the newly added Role will directly inherit.
*
* In order to resolve potential ambiguities with conflicting rules inherited
* from different parents, the most recently added parent takes precedence over
* parents that were previously added. In other words, the first parent added
* will have the least priority, and the last parent added will have the
* highest priority.
*
* @param Zend_Acl_Role_Interface $role
* @param Zend_Acl_Role_Interface|string|array $parents
* @uses Zend_Acl_Role_Registry::add()
* @return Zend_Acl Provides a fluent interface
*/
public function addRole($role, $parents = null)
{
if (is_string($role)) {
$role = new Zend_Acl_Role($role);
}
if (!$role instanceof Zend_Acl_Role_Interface) {
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception('addRole() expects $role to be of type Zend_Acl_Role_Interface');
}
$this->_getRoleRegistry()->add($role, $parents);
return $this;
}
/**
* Returns the identified Role
*
* The $role parameter can either be a Role or Role identifier.
*
* @param Zend_Acl_Role_Interface|string $role
* @uses Zend_Acl_Role_Registry::get()
* @return Zend_Acl_Role_Interface
*/
public function getRole($role)
{
return $this->_getRoleRegistry()->get($role);
}
/**
* Returns true if and only if the Role exists in the registry
*
* The $role parameter can either be a Role or a Role identifier.
*
* @param Zend_Acl_Role_Interface|string $role
* @uses Zend_Acl_Role_Registry::has()
* @return boolean
*/
public function hasRole($role)
{
return $this->_getRoleRegistry()->has($role);
}
/**
* Returns true if and only if $role inherits from $inherit
*
* Both parameters may be either a Role or a Role identifier. If
* $onlyParents is true, then $role must inherit directly from
* $inherit in order to return true. By default, this method looks
* through the entire inheritance DAG to determine whether $role
* inherits from $inherit through its ancestor Roles.
*
* @param Zend_Acl_Role_Interface|string $role
* @param Zend_Acl_Role_Interface|string $inherit
* @param boolean $onlyParents
* @uses Zend_Acl_Role_Registry::inherits()
* @return boolean
*/
public function inheritsRole($role, $inherit, $onlyParents = false)
{
return $this->_getRoleRegistry()->inherits($role, $inherit, $onlyParents);
}
/**
* Removes the Role from the registry
*
* The $role parameter can either be a Role or a Role identifier.
*
* @param Zend_Acl_Role_Interface|string $role
* @uses Zend_Acl_Role_Registry::remove()
* @return Zend_Acl Provides a fluent interface
*/
public function removeRole($role)
{
$this->_getRoleRegistry()->remove($role);
if ($role instanceof Zend_Acl_Role_Interface) {
$roleId = $role->getRoleId();
} else {
$roleId = $role;
}
foreach ($this->_rules['allResources']['byRoleId'] as $roleIdCurrent => $rules) {
if ($roleId === $roleIdCurrent) {
unset($this->_rules['allResources']['byRoleId'][$roleIdCurrent]);
}
}
foreach ($this->_rules['byResourceId'] as $resourceIdCurrent => $visitor) {
if (array_key_exists('byRoleId', $visitor)) {
foreach ($visitor['byRoleId'] as $roleIdCurrent => $rules) {
if ($roleId === $roleIdCurrent) {
unset($this->_rules['byResourceId'][$resourceIdCurrent]['byRoleId'][$roleIdCurrent]);
}
}
}
}
return $this;
}
/**
* Removes all Roles from the registry
*
* @uses Zend_Acl_Role_Registry::removeAll()
* @return Zend_Acl Provides a fluent interface
*/
public function removeRoleAll()
{
$this->_getRoleRegistry()->removeAll();
foreach ($this->_rules['allResources']['byRoleId'] as $roleIdCurrent => $rules) {
unset($this->_rules['allResources']['byRoleId'][$roleIdCurrent]);
}
foreach ($this->_rules['byResourceId'] as $resourceIdCurrent => $visitor) {
foreach ($visitor['byRoleId'] as $roleIdCurrent => $rules) {
unset($this->_rules['byResourceId'][$resourceIdCurrent]['byRoleId'][$roleIdCurrent]);
}
}
return $this;
}
/**
* Adds a Resource having an identifier unique to the ACL
*
* The $parent parameter may be a reference to, or the string identifier for,
* the existing Resource from which the newly added Resource will inherit.
*
* @param Zend_Acl_Resource_Interface|string $resource
* @param Zend_Acl_Resource_Interface|string $parent
* @throws Zend_Acl_Exception
* @return Zend_Acl Provides a fluent interface
*/
public function addResource($resource, $parent = null)
{
if (is_string($resource)) {
$resource = new Zend_Acl_Resource($resource);
}
if (!$resource instanceof Zend_Acl_Resource_Interface) {
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception('addResource() expects $resource to be of type Zend_Acl_Resource_Interface');
}
$resourceId = $resource->getResourceId();
if ($this->has($resourceId)) {
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception("Resource id '$resourceId' already exists in the ACL");
}
$resourceParent = null;
if (null !== $parent) {
try {
if ($parent instanceof Zend_Acl_Resource_Interface) {
$resourceParentId = $parent->getResourceId();
} else {
$resourceParentId = $parent;
}
$resourceParent = $this->get($resourceParentId);
} catch (Zend_Acl_Exception $e) {
throw new Zend_Acl_Exception("Parent Resource id '$resourceParentId' does not exist");
}
$this->_resources[$resourceParentId]['children'][$resourceId] = $resource;
}
$this->_resources[$resourceId] = array(
'instance' => $resource,
'parent' => $resourceParent,
'children' => array()
);
return $this;
}
/**
* Adds a Resource having an identifier unique to the ACL
*
* The $parent parameter may be a reference to, or the string identifier for,
* the existing Resource from which the newly added Resource will inherit.
*
* @deprecated in version 1.9.1 and will be available till 2.0. New code
* should use addResource() instead.
*
* @param Zend_Acl_Resource_Interface $resource
* @param Zend_Acl_Resource_Interface|string $parent
* @throws Zend_Acl_Exception
* @return Zend_Acl Provides a fluent interface
*/
public function add(Zend_Acl_Resource_Interface $resource, $parent = null)
{
return $this->addResource($resource, $parent);
}
/**
* Returns the identified Resource
*
* The $resource parameter can either be a Resource or a Resource identifier.
*
* @param Zend_Acl_Resource_Interface|string $resource
* @throws Zend_Acl_Exception
* @return Zend_Acl_Resource_Interface
*/
public function get($resource)
{
if ($resource instanceof Zend_Acl_Resource_Interface) {
$resourceId = $resource->getResourceId();
} else {
$resourceId = (string) $resource;
}
if (!$this->has($resource)) {
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception("Resource '$resourceId' not found");
}
return $this->_resources[$resourceId]['instance'];
}
/**
* Returns true if and only if the Resource exists in the ACL
*
* The $resource parameter can either be a Resource or a Resource identifier.
*
* @param Zend_Acl_Resource_Interface|string $resource
* @return boolean
*/
public function has($resource)
{
if ($resource instanceof Zend_Acl_Resource_Interface) {
$resourceId = $resource->getResourceId();
} else {
$resourceId = (string) $resource;
}
return isset($this->_resources[$resourceId]);
}
/**
* Returns true if and only if $resource inherits from $inherit
*
* Both parameters may be either a Resource or a Resource identifier. If
* $onlyParent is true, then $resource must inherit directly from
* $inherit in order to return true. By default, this method looks
* through the entire inheritance tree to determine whether $resource
* inherits from $inherit through its ancestor Resources.
*
* @param Zend_Acl_Resource_Interface|string $resource
* @param Zend_Acl_Resource_Interface|string $inherit
* @param boolean $onlyParent
* @throws Zend_Acl_Resource_Registry_Exception
* @return boolean
*/
public function inherits($resource, $inherit, $onlyParent = false)
{
try {
$resourceId = $this->get($resource)->getResourceId();
$inheritId = $this->get($inherit)->getResourceId();
} catch (Zend_Acl_Exception $e) {
throw $e;
}
if (null !== $this->_resources[$resourceId]['parent']) {
$parentId = $this->_resources[$resourceId]['parent']->getResourceId();
if ($inheritId === $parentId) {
return true;
} else if ($onlyParent) {
return false;
}
} else {
return false;
}
while (null !== $this->_resources[$parentId]['parent']) {
$parentId = $this->_resources[$parentId]['parent']->getResourceId();
if ($inheritId === $parentId) {
return true;
}
}
return false;
}
/**
* Removes a Resource and all of its children
*
* The $resource parameter can either be a Resource or a Resource identifier.
*
* @param Zend_Acl_Resource_Interface|string $resource
* @throws Zend_Acl_Exception
* @return Zend_Acl Provides a fluent interface
*/
public function remove($resource)
{
try {
$resourceId = $this->get($resource)->getResourceId();
} catch (Zend_Acl_Exception $e) {
throw $e;
}
$resourcesRemoved = array($resourceId);
if (null !== ($resourceParent = $this->_resources[$resourceId]['parent'])) {
unset($this->_resources[$resourceParent->getResourceId()]['children'][$resourceId]);
}
foreach ($this->_resources[$resourceId]['children'] as $childId => $child) {
$this->remove($childId);
$resourcesRemoved[] = $childId;
}
foreach ($resourcesRemoved as $resourceIdRemoved) {
foreach ($this->_rules['byResourceId'] as $resourceIdCurrent => $rules) {
if ($resourceIdRemoved === $resourceIdCurrent) {
unset($this->_rules['byResourceId'][$resourceIdCurrent]);
}
}
}
unset($this->_resources[$resourceId]);
return $this;
}
/**
* Removes all Resources
*
* @return Zend_Acl Provides a fluent interface
*/
public function removeAll()
{
foreach ($this->_resources as $resourceId => $resource) {
foreach ($this->_rules['byResourceId'] as $resourceIdCurrent => $rules) {
if ($resourceId === $resourceIdCurrent) {
unset($this->_rules['byResourceId'][$resourceIdCurrent]);
}
}
}
$this->_resources = array();
return $this;
}
/**
* Adds an "allow" rule to the ACL
*
* @param Zend_Acl_Role_Interface|string|array $roles
* @param Zend_Acl_Resource_Interface|string|array $resources
* @param string|array $privileges
* @param Zend_Acl_Assert_Interface $assert
* @uses Zend_Acl::setRule()
* @return Zend_Acl Provides a fluent interface
*/
public function allow($roles = null, $resources = null, $privileges = null, Zend_Acl_Assert_Interface $assert = null)
{
return $this->setRule(self::OP_ADD, self::TYPE_ALLOW, $roles, $resources, $privileges, $assert);
}
/**
* Adds a "deny" rule to the ACL
*
* @param Zend_Acl_Role_Interface|string|array $roles
* @param Zend_Acl_Resource_Interface|string|array $resources
* @param string|array $privileges
* @param Zend_Acl_Assert_Interface $assert
* @uses Zend_Acl::setRule()
* @return Zend_Acl Provides a fluent interface
*/
public function deny($roles = null, $resources = null, $privileges = null, Zend_Acl_Assert_Interface $assert = null)
{
return $this->setRule(self::OP_ADD, self::TYPE_DENY, $roles, $resources, $privileges, $assert);
}
/**
* Removes "allow" permissions from the ACL
*
* @param Zend_Acl_Role_Interface|string|array $roles
* @param Zend_Acl_Resource_Interface|string|array $resources
* @param string|array $privileges
* @uses Zend_Acl::setRule()
* @return Zend_Acl Provides a fluent interface
*/
public function removeAllow($roles = null, $resources = null, $privileges = null)
{
return $this->setRule(self::OP_REMOVE, self::TYPE_ALLOW, $roles, $resources, $privileges);
}
/**
* Removes "deny" restrictions from the ACL
*
* @param Zend_Acl_Role_Interface|string|array $roles
* @param Zend_Acl_Resource_Interface|string|array $resources
* @param string|array $privileges
* @uses Zend_Acl::setRule()
* @return Zend_Acl Provides a fluent interface
*/
public function removeDeny($roles = null, $resources = null, $privileges = null)
{
return $this->setRule(self::OP_REMOVE, self::TYPE_DENY, $roles, $resources, $privileges);
}
/**
* Performs operations on ACL rules
*
* The $operation parameter may be either OP_ADD or OP_REMOVE, depending on whether the
* user wants to add or remove a rule, respectively:
*
* OP_ADD specifics:
*
* A rule is added that would allow one or more Roles access to [certain $privileges
* upon] the specified Resource(s).
*
* OP_REMOVE specifics:
*
* The rule is removed only in the context of the given Roles, Resources, and privileges.
* Existing rules to which the remove operation does not apply would remain in the
* ACL.
*
* The $type parameter may be either TYPE_ALLOW or TYPE_DENY, depending on whether the
* rule is intended to allow or deny permission, respectively.
*
* The $roles and $resources parameters may be references to, or the string identifiers for,
* existing Resources/Roles, or they may be passed as arrays of these - mixing string identifiers
* and objects is ok - to indicate the Resources and Roles to which the rule applies. If either
* $roles or $resources is null, then the rule applies to all Roles or all Resources, respectively.
* Both may be null in order to work with the default rule of the ACL.
*
* The $privileges parameter may be used to further specify that the rule applies only
* to certain privileges upon the Resource(s) in question. This may be specified to be a single
* privilege with a string, and multiple privileges may be specified as an array of strings.
*
* If $assert is provided, then its assert() method must return true in order for
* the rule to apply. If $assert is provided with $roles, $resources, and $privileges all
* equal to null, then a rule having a type of:
*
* TYPE_ALLOW will imply a type of TYPE_DENY, and
*
* TYPE_DENY will imply a type of TYPE_ALLOW
*
* when the rule's assertion fails. This is because the ACL needs to provide expected
* behavior when an assertion upon the default ACL rule fails.
*
* @param string $operation
* @param string $type
* @param Zend_Acl_Role_Interface|string|array $roles
* @param Zend_Acl_Resource_Interface|string|array $resources
* @param string|array $privileges
* @param Zend_Acl_Assert_Interface $assert
* @throws Zend_Acl_Exception
* @uses Zend_Acl_Role_Registry::get()
* @uses Zend_Acl::get()
* @return Zend_Acl Provides a fluent interface
*/
public function setRule($operation, $type, $roles = null, $resources = null, $privileges = null,
Zend_Acl_Assert_Interface $assert = null)
{
// ensure that the rule type is valid; normalize input to uppercase
$type = strtoupper($type);
if (self::TYPE_ALLOW !== $type && self::TYPE_DENY !== $type) {
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception("Unsupported rule type; must be either '" . self::TYPE_ALLOW . "' or '"
. self::TYPE_DENY . "'");
}
// ensure that all specified Roles exist; normalize input to array of Role objects or null
if (!is_array($roles)) {
$roles = array($roles);
} else if (0 === count($roles)) {
$roles = array(null);
}
$rolesTemp = $roles;
$roles = array();
foreach ($rolesTemp as $role) {
if (null !== $role) {
$roles[] = $this->_getRoleRegistry()->get($role);
} else {
$roles[] = null;
}
}
unset($rolesTemp);
// ensure that all specified Resources exist; normalize input to array of Resource objects or null
if (!is_array($resources)) {
$resources = array($resources);
} else if (0 === count($resources)) {
$resources = array(null);
}
$resourcesTemp = $resources;
$resources = array();
foreach ($resourcesTemp as $resource) {
if (null !== $resource) {
$resources[] = $this->get($resource);
} else {
$resources[] = null;
}
}
unset($resourcesTemp);
// normalize privileges to array
if (null === $privileges) {
$privileges = array();
} else if (!is_array($privileges)) {
$privileges = array($privileges);
}
switch ($operation) {
// add to the rules
case self::OP_ADD:
foreach ($resources as $resource) {
foreach ($roles as $role) {
$rules =& $this->_getRules($resource, $role, true);
if (0 === count($privileges)) {
$rules['allPrivileges']['type'] = $type;
$rules['allPrivileges']['assert'] = $assert;
if (!isset($rules['byPrivilegeId'])) {
$rules['byPrivilegeId'] = array();
}
} else {
foreach ($privileges as $privilege) {
$rules['byPrivilegeId'][$privilege]['type'] = $type;
$rules['byPrivilegeId'][$privilege]['assert'] = $assert;
}
}
}
}
break;
// remove from the rules
case self::OP_REMOVE:
foreach ($resources as $resource) {
foreach ($roles as $role) {
$rules =& $this->_getRules($resource, $role);
if (null === $rules) {
continue;
}
if (0 === count($privileges)) {
if (null === $resource && null === $role) {
if ($type === $rules['allPrivileges']['type']) {
$rules = array(
'allPrivileges' => array(
'type' => self::TYPE_DENY,
'assert' => null
),
'byPrivilegeId' => array()
);
}
continue;
}
if ($type === $rules['allPrivileges']['type']) {
unset($rules['allPrivileges']);
}
} else {
foreach ($privileges as $privilege) {
if (isset($rules['byPrivilegeId'][$privilege]) &&
$type === $rules['byPrivilegeId'][$privilege]['type']) {
unset($rules['byPrivilegeId'][$privilege]);
}
}
}
}
}
break;
default:
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception("Unsupported operation; must be either '" . self::OP_ADD . "' or '"
. self::OP_REMOVE . "'");
}
return $this;
}
/**
* Returns true if and only if the Role has access to the Resource
*
* The $role and $resource parameters may be references to, or the string identifiers for,
* an existing Resource and Role combination.
*
* If either $role or $resource is null, then the query applies to all Roles or all Resources,
* respectively. Both may be null to query whether the ACL has a "blacklist" rule
* (allow everything to all). By default, Zend_Acl creates a "whitelist" rule (deny
* everything to all), and this method would return false unless this default has
* been overridden (i.e., by executing $acl->allow()).
*
* If a $privilege is not provided, then this method returns false if and only if the
* Role is denied access to at least one privilege upon the Resource. In other words, this
* method returns true if and only if the Role is allowed all privileges on the Resource.
*
* This method checks Role inheritance using a depth-first traversal of the Role registry.
* The highest priority parent (i.e., the parent most recently added) is checked first,
* and its respective parents are checked similarly before the lower-priority parents of
* the Role are checked.
*
* @param Zend_Acl_Role_Interface|string $role
* @param Zend_Acl_Resource_Interface|string $resource
* @param string $privilege
* @uses Zend_Acl::get()
* @uses Zend_Acl_Role_Registry::get()
* @return boolean
*/
public function isAllowed($role = null, $resource = null, $privilege = null)
{
// reset role & resource to null
$this->_isAllowedRole = $this->_isAllowedResource = null;
if (null !== $role) {
// keep track of originally called role
$this->_isAllowedRole = $role;
$role = $this->_getRoleRegistry()->get($role);
if (!$this->_isAllowedRole instanceof Zend_Acl_Role_Interface) {
$this->_isAllowedRole = $role;
}
}
if (null !== $resource) {
// keep track of originally called resource
$this->_isAllowedResource = $resource;
$resource = $this->get($resource);
if (!$this->_isAllowedResource instanceof Zend_Acl_Resource_Interface) {
$this->_isAllowedResource = $resource;
}
}
if (null === $privilege) {
// query on all privileges
do {
// depth-first search on $role if it is not 'allRoles' pseudo-parent
if (null !== $role && null !== ($result = $this->_roleDFSAllPrivileges($role, $resource, $privilege))) {
return $result;
}
// look for rule on 'allRoles' psuedo-parent
if (null !== ($rules = $this->_getRules($resource, null))) {
foreach ($rules['byPrivilegeId'] as $privilege => $rule) {
if (self::TYPE_DENY === ($ruleTypeOnePrivilege = $this->_getRuleType($resource, null, $privilege))) {
return false;
}
}
if (null !== ($ruleTypeAllPrivileges = $this->_getRuleType($resource, null, null))) {
return self::TYPE_ALLOW === $ruleTypeAllPrivileges;
}
}
// try next Resource
$resource = $this->_resources[$resource->getResourceId()]['parent'];
} while (true); // loop terminates at 'allResources' pseudo-parent
} else {
// query on one privilege
do {
// depth-first search on $role if it is not 'allRoles' pseudo-parent
if (null !== $role && null !== ($result = $this->_roleDFSOnePrivilege($role, $resource, $privilege))) {
return $result;
}
// look for rule on 'allRoles' pseudo-parent
if (null !== ($ruleType = $this->_getRuleType($resource, null, $privilege))) {
return self::TYPE_ALLOW === $ruleType;
} else if (null !== ($ruleTypeAllPrivileges = $this->_getRuleType($resource, null, null))) {
return self::TYPE_ALLOW === $ruleTypeAllPrivileges;
}
// try next Resource
$resource = $this->_resources[$resource->getResourceId()]['parent'];
} while (true); // loop terminates at 'allResources' pseudo-parent
}
}
/**
* Returns the Role registry for this ACL
*
* If no Role registry has been created yet, a new default Role registry
* is created and returned.
*
* @return Zend_Acl_Role_Registry
*/
protected function _getRoleRegistry()
{
if (null === $this->_roleRegistry) {
$this->_roleRegistry = new Zend_Acl_Role_Registry();
}
return $this->_roleRegistry;
}
/**
* Performs a depth-first search of the Role DAG, starting at $role, in order to find a rule
* allowing/denying $role access to all privileges upon $resource
*
* This method returns true if a rule is found and allows access. If a rule exists and denies access,
* then this method returns false. If no applicable rule is found, then this method returns null.
*
* @param Zend_Acl_Role_Interface $role
* @param Zend_Acl_Resource_Interface $resource
* @return boolean|null
*/
protected function _roleDFSAllPrivileges(Zend_Acl_Role_Interface $role, Zend_Acl_Resource_Interface $resource = null)
{
$dfs = array(
'visited' => array(),
'stack' => array()
);
if (null !== ($result = $this->_roleDFSVisitAllPrivileges($role, $resource, $dfs))) {
return $result;
}
while (null !== ($role = array_pop($dfs['stack']))) {
if (!isset($dfs['visited'][$role->getRoleId()])) {
if (null !== ($result = $this->_roleDFSVisitAllPrivileges($role, $resource, $dfs))) {
return $result;
}
}
}
return null;
}
/**
* Visits an $role in order to look for a rule allowing/denying $role access to all privileges upon $resource
*
* This method returns true if a rule is found and allows access. If a rule exists and denies access,
* then this method returns false. If no applicable rule is found, then this method returns null.
*
* This method is used by the internal depth-first search algorithm and may modify the DFS data structure.
*
* @param Zend_Acl_Role_Interface $role
* @param Zend_Acl_Resource_Interface $resource
* @param array $dfs
* @return boolean|null
* @throws Zend_Acl_Exception
*/
protected function _roleDFSVisitAllPrivileges(Zend_Acl_Role_Interface $role, Zend_Acl_Resource_Interface $resource = null,
&$dfs = null)
{
if (null === $dfs) {
/**
* @see Zend_Acl_Exception
*/
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception('$dfs parameter may not be null');
}
if (null !== ($rules = $this->_getRules($resource, $role))) {
foreach ($rules['byPrivilegeId'] as $privilege => $rule) {
if (self::TYPE_DENY === ($ruleTypeOnePrivilege = $this->_getRuleType($resource, $role, $privilege))) {
return false;
}
}
if (null !== ($ruleTypeAllPrivileges = $this->_getRuleType($resource, $role, null))) {
return self::TYPE_ALLOW === $ruleTypeAllPrivileges;
}
}
$dfs['visited'][$role->getRoleId()] = true;
foreach ($this->_getRoleRegistry()->getParents($role) as $roleParentId => $roleParent) {
$dfs['stack'][] = $roleParent;
}
return null;
}
/**
* Performs a depth-first search of the Role DAG, starting at $role, in order to find a rule
* allowing/denying $role access to a $privilege upon $resource
*
* This method returns true if a rule is found and allows access. If a rule exists and denies access,
* then this method returns false. If no applicable rule is found, then this method returns null.
*
* @param Zend_Acl_Role_Interface $role
* @param Zend_Acl_Resource_Interface $resource
* @param string $privilege
* @return boolean|null
* @throws Zend_Acl_Exception
*/
protected function _roleDFSOnePrivilege(Zend_Acl_Role_Interface $role, Zend_Acl_Resource_Interface $resource = null,
$privilege = null)
{
if (null === $privilege) {
/**
* @see Zend_Acl_Exception
*/
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception('$privilege parameter may not be null');
}
$dfs = array(
'visited' => array(),
'stack' => array()
);
if (null !== ($result = $this->_roleDFSVisitOnePrivilege($role, $resource, $privilege, $dfs))) {
return $result;
}
while (null !== ($role = array_pop($dfs['stack']))) {
if (!isset($dfs['visited'][$role->getRoleId()])) {
if (null !== ($result = $this->_roleDFSVisitOnePrivilege($role, $resource, $privilege, $dfs))) {
return $result;
}
}
}
return null;
}
/**
* Visits an $role in order to look for a rule allowing/denying $role access to a $privilege upon $resource
*
* This method returns true if a rule is found and allows access. If a rule exists and denies access,
* then this method returns false. If no applicable rule is found, then this method returns null.
*
* This method is used by the internal depth-first search algorithm and may modify the DFS data structure.
*
* @param Zend_Acl_Role_Interface $role
* @param Zend_Acl_Resource_Interface $resource
* @param string $privilege
* @param array $dfs
* @return boolean|null
* @throws Zend_Acl_Exception
*/
protected function _roleDFSVisitOnePrivilege(Zend_Acl_Role_Interface $role, Zend_Acl_Resource_Interface $resource = null,
$privilege = null, &$dfs = null)
{
if (null === $privilege) {
/**
* @see Zend_Acl_Exception
*/
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception('$privilege parameter may not be null');
}
if (null === $dfs) {
/**
* @see Zend_Acl_Exception
*/
require_once 'Zend/Acl/Exception.php';
throw new Zend_Acl_Exception('$dfs parameter may not be null');
}
if (null !== ($ruleTypeOnePrivilege = $this->_getRuleType($resource, $role, $privilege))) {
return self::TYPE_ALLOW === $ruleTypeOnePrivilege;
} else if (null !== ($ruleTypeAllPrivileges = $this->_getRuleType($resource, $role, null))) {
return self::TYPE_ALLOW === $ruleTypeAllPrivileges;
}
$dfs['visited'][$role->getRoleId()] = true;
foreach ($this->_getRoleRegistry()->getParents($role) as $roleParentId => $roleParent) {
$dfs['stack'][] = $roleParent;
}
return null;
}
/**
* Returns the rule type associated with the specified Resource, Role, and privilege
* combination.
*
* If a rule does not exist or its attached assertion fails, which means that
* the rule is not applicable, then this method returns null. Otherwise, the
* rule type applies and is returned as either TYPE_ALLOW or TYPE_DENY.
*
* If $resource or $role is null, then this means that the rule must apply to
* all Resources or Roles, respectively.
*
* If $privilege is null, then the rule must apply to all privileges.
*
* If all three parameters are null, then the default ACL rule type is returned,
* based on whether its assertion method passes.
*
* @param Zend_Acl_Resource_Interface $resource
* @param Zend_Acl_Role_Interface $role
* @param string $privilege
* @return string|null
*/
protected function _getRuleType(Zend_Acl_Resource_Interface $resource = null, Zend_Acl_Role_Interface $role = null,
$privilege = null)
{
// get the rules for the $resource and $role
if (null === ($rules = $this->_getRules($resource, $role))) {
return null;
}
// follow $privilege
if (null === $privilege) {
if (isset($rules['allPrivileges'])) {
$rule = $rules['allPrivileges'];
} else {
return null;
}
} else if (!isset($rules['byPrivilegeId'][$privilege])) {
return null;
} else {
$rule = $rules['byPrivilegeId'][$privilege];
}
// check assertion first
if ($rule['assert']) {
$assertion = $rule['assert'];
$assertionValue = $assertion->assert(
$this,
($this->_isAllowedRole instanceof Zend_Acl_Role_Interface) ? $this->_isAllowedRole : $role,
($this->_isAllowedResource instanceof Zend_Acl_Resource_Interface) ? $this->_isAllowedResource : $resource,
$privilege
);
}
if (null === $rule['assert'] || $assertionValue) {
return $rule['type'];
} else if (null !== $resource || null !== $role || null !== $privilege) {
return null;
} else if (self::TYPE_ALLOW === $rule['type']) {
return self::TYPE_DENY;
} else {
return self::TYPE_ALLOW;
}
}
/**
* Returns the rules associated with a Resource and a Role, or null if no such rules exist
*
* If either $resource or $role is null, this means that the rules returned are for all Resources or all Roles,
* respectively. Both can be null to return the default rule set for all Resources and all Roles.
*
* If the $create parameter is true, then a rule set is first created and then returned to the caller.
*
* @param Zend_Acl_Resource_Interface $resource
* @param Zend_Acl_Role_Interface $role
* @param boolean $create
* @return array|null
*/
protected function &_getRules(Zend_Acl_Resource_Interface $resource = null, Zend_Acl_Role_Interface $role = null,
$create = false)
{
// create a reference to null
$null = null;
$nullRef =& $null;
// follow $resource
do {
if (null === $resource) {
$visitor =& $this->_rules['allResources'];
break;
}
$resourceId = $resource->getResourceId();
if (!isset($this->_rules['byResourceId'][$resourceId])) {
if (!$create) {
return $nullRef;
}
$this->_rules['byResourceId'][$resourceId] = array();
}
$visitor =& $this->_rules['byResourceId'][$resourceId];
} while (false);
// follow $role
if (null === $role) {
if (!isset($visitor['allRoles'])) {
if (!$create) {
return $nullRef;
}
$visitor['allRoles']['byPrivilegeId'] = array();
}
return $visitor['allRoles'];
}
$roleId = $role->getRoleId();
if (!isset($visitor['byRoleId'][$roleId])) {
if (!$create) {
return $nullRef;
}
$visitor['byRoleId'][$roleId]['byPrivilegeId'] = array();
}
return $visitor['byRoleId'][$roleId];
}
/**
* @return array of registered roles
*
*/
public function getRegisteredRoles()
{
return $this->_getRoleRegistry()->getRoles();
}
}
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