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<?php
/**
* Class for representing a SAML 2 error.
*
* @package simpleSAMLphp
* @version $Id$
*/
class sspmod_saml_Error extends SimpleSAML_Error_Exception {
/**
* The top-level status code.
*
* @var string
*/
private $status;
/**
* The second-level status code, or NULL if no second-level status code is defined.
*
* @var string|NULL
*/
private $subStatus;
/**
* The status message, or NULL if no status message is defined.
*
* @var string|NULL
*/
private $statusMessage;
/**
* Create a SAML 2 error.
*
* @param string $status The top-level status code.
* @param string|NULL $subStatus The second-level status code. Can be NULL, in which case there is no second-level status code.
* @param string|NULL $statusMessage The status message. Can be NULL, in which case there is no status message.
* @param Exception|NULL $cause The cause of this exception. Can be NULL.
*/
public function __construct($status, $subStatus = NULL, $statusMessage = NULL, Exception $cause = NULL) {
assert('is_string($status)');
assert('is_null($subStatus) || is_string($subStatus)');
assert('is_null($statusMessage) || is_string($statusMessage)');
$st = self::shortStatus($status);
if ($subStatus !== NULL) {
$st .= '/' . self::shortStatus($subStatus);
}
if ($statusMessage !== NULL) {
$st .= ': ' . $statusMessage;
}
parent::__construct($st, 0, $cause);
$this->status = $status;
$this->subStatus = $subStatus;
$this->statusMessage = $statusMessage;
}
/**
* Get the top-level status code.
*
* @return string The top-level status code.
*/
public function getStatus() {
return $this->status;
}
/**
* Get the second-level status code.
*
* @return string|NULL The second-level status code or NULL if no second-level status code is present.
*/
public function getSubStatus() {
return $this->subStatus;
}
/**
* Get the status message.
*
* @return string|NULL The status message or NULL if no status message is present.
*/
public function getStatusMessage() {
return $this->statusMessage;
}
/**
* Create a SAML2 error from an exception.
*
* This function attempts to create a SAML2 error with the appropriate
* status codes from an arbitrary exception.
*
* @param Exception $exception The original exception.
* @return sspmod_saml_Error The new exception.
*/
public static function fromException(Exception $exception) {
if ($exception instanceof sspmod_saml_Error) {
/* Return the original exception unchanged. */
return $exception;
} elseif ($exception instanceof SimpleSAML_Error_NoPassive) {
$e = new self(
SAML2_Const::STATUS_RESPONDER,
SAML2_Const::STATUS_NO_PASSIVE,
$exception->getMessage(),
$exception
);
} elseif ($exception instanceof SimpleSAML_Error_ProxyCountExceeded) {
$e = new self(
SAML2_Const::STATUS_RESPONDER,
SAML2_Const::STATUS_PROXY_COUNT_EXCEEDED,
$exception->getMessage(),
$exception
);
} else {
$e = new self(
SAML2_Const::STATUS_RESPONDER,
NULL,
get_class($exception) . ': ' . $exception->getMessage(),
$exception
);
}
return $e;
}
/**
* Create a normal exception from a SAML2 error.
*
* This function attempts to reverse the operation of the fromException() function.
* If it is unable to create a more specific exception, it will return the current
* object.
*
* @see sspmod_saml_Error::fromException()
*
* @return SimpleSAML_Error_Exception An exception representing this error.
*/
public function toException() {
if ($this->statusMessage !== NULL) {
$msg = $this->statusMessage;
} else {
$msg = '';
}
$e = NULL;
switch ($this->status) {
case SAML2_Const::STATUS_RESPONDER:
switch ($this->subStatus) {
case SAML2_Const::STATUS_NO_PASSIVE:
$e = new SimpleSAML_Error_NoPassive($this->statusMessage, 0, $this);
break;
}
break;
}
if ($e === NULL) {
return $this;
}
return $e;
}
/**
* Create a short version of the status code.
*
* Remove the 'urn:oasis:names:tc:SAML:2.0:status:'-prefix of status codes
* if it is present.
*
* @param string $status The status code.
* @return string A shorter version of the status code.
*/
private static function shortStatus($status) {
assert('is_string($status)');
$t = 'urn:oasis:names:tc:SAML:2.0:status:';
if (substr($status, 0, strlen($t)) === $t) {
return substr($status, strlen($t));
}
return $status;
}
}
?>
|
