/**
* Is validator check valid?
* @see Zend_Validate_Interface::isValid()
*/
public function isValid($value, $context = null)
{
$context = array_change_key_case($context, CASE_LOWER);
switch ($this->hashAlgorithm) {
case WirecardCEE_Stdlib_Fingerprint::HASH_ALGORITHM_HMAC_SHA512:
case WirecardCEE_Stdlib_Fingerprint::HASH_ALGORITHM_SHA512:
$stringLength = 128;
break;
case WirecardCEE_Stdlib_Fingerprint::HASH_ALGORITHM_MD5:
$stringLength = 32;
break;
default:
throw new WirecardCEE_Stdlib_Exception_UnexpectedValueException(sprintf("Used hash algorithm '%s' is not supported. MD5, SHA512, or HMAC_SHA512 are currently supported.", $this->hashAlgorithm));
break;
}
if (strlen($value) != $stringLength) {
return false;
}
if ($this->fingerprintOrderType == self::TYPE_FIXED) {
$fingerprintOrder = $this->fingerprintOrder;
} else {
if (array_key_exists($this->fingerprintOrderField, $context)) {
$fingerprintOrder = new WirecardCEE_Stdlib_FingerprintOrder(strtolower($context[$this->fingerprintOrderField]));
} else {
$this->_error(self::FINGERPRINTORDER_MISSING);
return false;
}
}
$fingerprintOrder->setOrder(array_map('strtolower', $this->fingerprintOrder->__toArray()));
$fingerprintFields = array();
foreach ($fingerprintOrder as $fingerprintFieldKey) {
if ($fingerprintFieldKey == 'secret') {
$fingerprintFields[$fingerprintFieldKey] = $this->secret;
} else {
$fingerprintFields[$fingerprintFieldKey] = isset($context[$fingerprintFieldKey]) ? $context[$fingerprintFieldKey] : '';
}
}
if (!WirecardCEE_Stdlib_Fingerprint::compare($fingerprintFields, $fingerprintOrder, $value)) {
$this->_error(self::INVALID);
return false;
}
return true;
}
/**
* @dataProvider fingerprintProvider
*/
public function testFalseCompare($values, $fingerprintOrder, $hash)
{
$hash = md5($hash);
$this->assertFalse(WirecardCEE_Stdlib_Fingerprint::compare($values, new WirecardCEE_Stdlib_FingerprintOrder($fingerprintOrder), $hash));
}