1 files changed, 293 insertions, 0 deletions
diff --git a/lib/prado/framework/Security/TAuthorizationRule.php b/lib/prado/framework/Security/TAuthorizationRule.php
new file mode 100644
index 0000000..1b86496
--- /dev/null
+++ b/lib/prado/framework/Security/TAuthorizationRule.php
@@ -0,0 +1,293 @@
+<?php
+/**
+ * TAuthorizationRule, TAuthorizationRuleCollection class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link https://github.com/pradosoft/prado
+ * @copyright Copyright &copy; 2005-2015 The PRADO Group
+ * @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
+ * @package System.Security
+ */
+/**
+ * TAuthorizationRule class
+ *
+ * TAuthorizationRule represents a single authorization rule.
+ * A rule is specified by an action (required), a list of users (optional),
+ * a list of roles (optional), a verb (optional), and a list of IP rules (optional).
+ * Action can be either 'allow' or 'deny'.
+ * Guest (anonymous, unauthenticated) users are represented by question mark '?'.
+ * All users (including guest users) are represented by asterisk '*'.
+ * Authenticated users are represented by '@'.
+ * Users/roles are case-insensitive.
+ * Different users/roles are separated by comma ','.
+ * Verb can be either 'get' or 'post'. If it is absent, it means both.
+ * IP rules are separated by comma ',' and can contain wild card in the rules (e.g. '192.132.23.33, 192.122.*.*')
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Security
+ * @since 3.0
+ */
+class TAuthorizationRule extends TComponent
+{
+	/**
+	 * @var string action, either 'allow' or 'deny'
+	 */
+	private $_action;
+	/**
+	 * @var array list of user IDs
+	 */
+	private $_users;
+	/**
+	 * @var array list of roles
+	 */
+	private $_roles;
+	/**
+	 * @var string verb, may be empty, 'get', or 'post'.
+	 */
+	private $_verb;
+	/**
+	 * @var string IP patterns
+	 */
+	private $_ipRules;
+	/**
+	 * @var boolean if this rule applies to everyone
+	 */
+	private $_everyone;
+	/**
+	 * @var boolean if this rule applies to guest user
+	 */
+	private $_guest;
+	/**
+	 * @var boolean if this rule applies to authenticated users
+	 */
+	private $_authenticated;
+
+	/**
+	 * Constructor.
+	 * @param string action, either 'deny' or 'allow'
+	 * @param string a comma separated user list
+	 * @param string a comma separated role list
+	 * @param string verb, can be empty, 'get', or 'post'
+	 * @param string IP rules (separated by comma, can contain wild card *)
+	 */
+	public function __construct($action,$users,$roles,$verb='',$ipRules='')
+	{
+		$action=strtolower(trim($action));
+		if($action==='allow' || $action==='deny')
+			$this->_action=$action;
+		else
+			throw new TInvalidDataValueException('authorizationrule_action_invalid',$action);
+		$this->_users=array();
+		$this->_roles=array();
+		$this->_ipRules=array();
+		$this->_everyone=false;
+		$this->_guest=false;
+		$this->_authenticated=false;
+
+		if(trim($users)==='')
+			$users='*';
+		foreach(explode(',',$users) as $user)
+		{
+			if(($user=trim(strtolower($user)))!=='')
+			{
+				if($user==='*')
+				{
+					$this->_everyone=true;
+					break;
+				}
+				else if($user==='?')
+					$this->_guest=true;
+				else if($user==='@')
+					$this->_authenticated=true;
+				else
+					$this->_users[]=$user;
+			}
+		}
+
+		if(trim($roles)==='')
+			$roles='*';
+		foreach(explode(',',$roles) as $role)
+		{
+			if(($role=trim(strtolower($role)))!=='')
+				$this->_roles[]=$role;
+		}
+
+		if(($verb=trim(strtolower($verb)))==='')
+			$verb='*';
+		if($verb==='*' || $verb==='get' || $verb==='post')
+			$this->_verb=$verb;
+		else
+			throw new TInvalidDataValueException('authorizationrule_verb_invalid',$verb);
+
+		if(trim($ipRules)==='')
+			$ipRules='*';
+		foreach(explode(',',$ipRules) as $ipRule)
+		{
+			if(($ipRule=trim($ipRule))!=='')
+				$this->_ipRules[]=$ipRule;
+		}
+	}
+
+	/**
+	 * @return string action, either 'allow' or 'deny'
+	 */
+	public function getAction()
+	{
+		return $this->_action;
+	}
+
+	/**
+	 * @return array list of user IDs
+	 */
+	public function getUsers()
+	{
+		return $this->_users;
+	}
+
+	/**
+	 * @return array list of roles
+	 */
+	public function getRoles()
+	{
+		return $this->_roles;
+	}
+
+	/**
+	 * @return string verb, may be empty, 'get', or 'post'.
+	 */
+	public function getVerb()
+	{
+		return $this->_verb;
+	}
+
+	/**
+	 * @return array list of IP rules.
+	 * @since 3.1.1
+	 */
+	public function getIPRules()
+	{
+		return $this->_ipRules;
+	}
+
+	/**
+	 * @return boolean if this rule applies to everyone
+	 */
+	public function getGuestApplied()
+	{
+		return $this->_guest || $this->_everyone;
+	}
+
+	/**
+	 * @return boolean if this rule applies to everyone
+	 */
+	public function getEveryoneApplied()
+	{
+		return $this->_everyone;
+	}
+
+	/**
+	 * @return boolean if this rule applies to authenticated users
+	 */
+	public function getAuthenticatedApplied()
+	{
+		return $this->_authenticated || $this->_everyone;
+	}
+
+	/**
+	 * @param IUser the user object
+	 * @param string the request verb (GET, PUT)
+	 * @param string the request IP address
+	 * @return integer 1 if the user is allowed, -1 if the user is denied, 0 if the rule does not apply to the user
+	 */
+	public function isUserAllowed(IUser $user,$verb,$ip)
+	{
+		if($this->isVerbMatched($verb) && $this->isIpMatched($ip) && $this->isUserMatched($user) && $this->isRoleMatched($user))
+			return ($this->_action==='allow')?1:-1;
+		else
+			return 0;
+	}
+
+	private function isIpMatched($ip)
+	{
+		if(empty($this->_ipRules))
+			return 1;
+		foreach($this->_ipRules as $rule)
+		{
+			if($rule==='*' || $rule===$ip || (($pos=strpos($rule,'*'))!==false && strncmp($ip,$rule,$pos)===0))
+				return 1;
+		}
+		return 0;
+	}
+
+	private function isUserMatched($user)
+	{
+		return ($this->_everyone || ($this->_guest && $user->getIsGuest()) || ($this->_authenticated && !$user->getIsGuest()) || in_array(strtolower($user->getName()),$this->_users));
+	}
+
+	private function isRoleMatched($user)
+	{
+		foreach($this->_roles as $role)
+		{
+			if($role==='*' || $user->isInRole($role))
+				return true;
+		}
+		return false;
+	}
+
+	private function isVerbMatched($verb)
+	{
+		return ($this->_verb==='*' || strcasecmp($verb,$this->_verb)===0);
+	}
+}
+
+
+/**
+ * TAuthorizationRuleCollection class.
+ * TAuthorizationRuleCollection represents a collection of authorization rules {@link TAuthorizationRule}.
+ * To check if a user is allowed, call {@link isUserAllowed}.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Security
+ * @since 3.0
+ */
+class TAuthorizationRuleCollection extends TList
+{
+	/**
+	 * @param IUser the user to be authorized
+	 * @param string verb, can be empty, 'post' or 'get'.
+	 * @param string the request IP address
+	 * @return boolean whether the user is allowed
+	 */
+	public function isUserAllowed($user,$verb,$ip)
+	{
+		if($user instanceof IUser)
+		{
+			$verb=strtolower(trim($verb));
+			foreach($this as $rule)
+			{
+				if(($decision=$rule->isUserAllowed($user,$verb,$ip))!==0)
+					return ($decision>0);
+			}
+			return true;
+		}
+		else
+			return false;
+	}
+
+	/**
+	 * Inserts an item at the specified position.
+	 * This overrides the parent implementation by performing additional
+	 * operations for each newly added TAuthorizationRule object.
+	 * @param integer the specified position.
+	 * @param mixed new item
+	 * @throws TInvalidDataTypeException if the item to be inserted is not a TAuthorizationRule object.
+	 */
+	public function insertAt($index,$item)
+	{
+		if($item instanceof TAuthorizationRule)
+			parent::insertAt($index,$item);
+		else
+			throw new TInvalidDataTypeException('authorizationrulecollection_authorizationrule_required');
+	}
+}
+