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<?php
/**
* Copyright 2014 SURFnet bv
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Surfnet\Stepup\Identity\Value;
use Surfnet\Stepup\Exception\InvalidArgumentException;
final class GssfId implements SecondFactorIdentifier
{
* @var string
private $gssfId;
public static function unknown()
return new self('—');
}
public function __construct($gssfId)
if (!is_string($gssfId) || trim($gssfId) === '') {
throw InvalidArgumentException::invalidType('non-empty string', 'gssfId', $gssfId);
$this->gssfId = trim($gssfId);
public function getValue()
return $this->gssfId;
public function __toString()
public function equals(SecondFactorIdentifier $other)
return $other instanceof self && $this->gssfId === $other->gssfId;
public function jsonSerialize()