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<?php |
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/** |
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* Copyright 2014 SURFnet bv |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace Surfnet\Stepup\Identity\Value; |
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use Surfnet\Stepup\Exception\InvalidArgumentException; |
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final class YubikeyPublicId implements SecondFactorIdentifier |
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{ |
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const UNKNOWN = '—'; |
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/** |
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* @var string |
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*/ |
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private $value; |
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public static function unknown() |
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{ |
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return new self(self::UNKNOWN); |
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} |
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public function __construct($value) |
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{ |
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if ($value === self::UNKNOWN) { |
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$this->value = $value; |
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return; |
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} |
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if (!is_string($value)) { |
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throw InvalidArgumentException::invalidType('string', 'value', $value); |
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} |
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// Numeric IDs must be left-padded with zeroes until eight characters. Longer IDs, up to twenty characters, may |
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// not be padded. |
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if (!preg_match('~^[0-9]{8,20}$~', $value)) { |
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throw new InvalidArgumentException('Given Yubikey public ID is not a string of 8 to 20 digits'); |
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} |
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if ($value !== sprintf('%08s', ltrim($value, '0'))) { |
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throw new InvalidArgumentException( |
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'Given Yubikey public ID is longer than 8 digits, yet left-padded with zeroes' |
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); |
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} |
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// Yubikey public IDs, in their (mod)hex format, may be up to sixteen characters in length. Thus, this is their |
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// maximum value. |
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if (gmp_cmp(gmp_init($value, 10), gmp_init('ffffffffffffffff', 16)) > 0) { |
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throw new InvalidArgumentException('Given Yubikey public ID is larger than 0xffffffffffffffff'); |
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} |
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$this->value = $value; |
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} |
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public function getValue() |
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{ |
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return $this->value; |
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} |
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public function __toString() |
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{ |
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return $this->value; |
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} |
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public function equals(SecondFactorIdentifier $other) |
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{ |
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return $other instanceof self && $this->value === $other->value; |
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} |
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public function jsonSerialize() |
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{ |
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return $this->value; |
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} |
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} |
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OpenConext /
Stepup-Middleware
