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<?php |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2016 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace Jose\Object; |
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use Assert\Assertion; |
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use Jose\Factory\JWKFactory; |
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/** |
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* Class RotatableJWK. |
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*/ |
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final class RotatableJWK implements JWKInterface |
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{ |
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/** |
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* @var \Jose\Object\JWKInterface |
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*/ |
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private $jwk; |
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/** |
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* @var string |
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*/ |
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private $filename; |
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/** |
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* @var int |
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*/ |
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private $ttl; |
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/** |
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* @var int|null |
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*/ |
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private $expires_at = 0; |
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/** |
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* @var array |
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*/ |
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private $parameters; |
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/** |
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* RotatableJWK constructor. |
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* |
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* @param string $filename |
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* @param array $parameters |
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* @param int $ttl |
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*/ |
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public function __construct($filename, array $parameters, $ttl = 0) |
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{ |
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Assertion::directory(dirname($filename), 'The selected directory does not exist.'); |
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Assertion::writeable(dirname($filename), 'The selected directory is not writable.'); |
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Assertion::integer($ttl, 'The parameter must an integer'); |
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Assertion::greaterOrEqualThan($ttl, 0, 'The parameter must be at least 0'); |
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$this->filename = $filename; |
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$this->parameters = $parameters; |
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$this->ttl = $ttl; |
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} |
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/** |
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* @return \Jose\Object\JWKInterface |
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*/ |
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private function getJWK() |
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{ |
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if (null === $this->jwk) { |
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$this->loadJWK(); |
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} |
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if (0 !== $this->expires_at && $this->expires_at < time()) { |
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$this->createJWK(); |
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} |
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return $this->jwk; |
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} |
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private function loadJWK() |
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{ |
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if (file_exists($this->filename)) { |
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$content = file_get_contents($this->filename); |
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if (false === $content) { |
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$this->createJWK(); |
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} |
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$content = json_decode($content, true); |
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if (!is_array($content) || !array_key_exists('expires_at', $content) || !array_key_exists('jwk', $content)) { |
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$this->createJWK(); |
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} |
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if (0 !== $content['expires_at'] && $content['expires_at'] < time()) { |
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$this->createJWK(); |
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} |
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$this->jwk = new JWK($content['jwk']); |
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} else { |
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$this->createJWK(); |
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} |
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} |
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private function createJWK() |
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{ |
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$this->jwk = JWKFactory::createKey($this->parameters); |
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if (0 !== $this->ttl) { |
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$this->expires_at = time() + $this->ttl; |
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} |
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file_put_contents( |
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$this->filename, |
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json_encode([ |
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'expires_at' => $this->expires_at, |
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'jwk' => $this->jwk, |
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]) |
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); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getAll() |
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{ |
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return $this->getJWK()->getAll(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function get($key) |
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{ |
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return $this->getJWK()->get($key); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function has($key) |
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{ |
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return $this->getJWK()->has($key); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function thumbprint($hash_algorithm) |
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{ |
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return $this->getJWK()->thumbprint($hash_algorithm); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function toPublic() |
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{ |
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return $this->getJWK()->toPublic(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function jsonSerialize() |
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{ |
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return $this->getJWK()->jsonSerialize(); |
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} |
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} |
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Spomky-Labs /
jose
