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<?php |
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declare(strict_types = 1); |
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namespace Sop\JWX\JWK\RSA; |
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use Sop\CryptoEncoding\PEM; |
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use Sop\CryptoTypes\Asymmetric\PublicKeyInfo; |
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use Sop\CryptoTypes\Asymmetric\RSA\RSAPublicKey; |
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use Sop\JWX\JWK\Asymmetric\PublicKeyJWK; |
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use Sop\JWX\JWK\Parameter\ExponentParameter; |
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use Sop\JWX\JWK\Parameter\JWKParameter; |
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use Sop\JWX\JWK\Parameter\KeyTypeParameter; |
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use Sop\JWX\JWK\Parameter\ModulusParameter; |
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/** |
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* Class representing RSA public key as a JWK. |
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* |
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* @see https://tools.ietf.org/html/rfc7517#section-4 |
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* @see https://tools.ietf.org/html/rfc7518#section-6.3 |
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* @see https://tools.ietf.org/html/rfc7518#section-6.3.1 |
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*/ |
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class RSAPublicKeyJWK extends PublicKeyJWK |
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{ |
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/** |
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* Parameter names managed by this class. |
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* |
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* @internal |
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* |
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* @var string[] |
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*/ |
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public const MANAGED_PARAMS = [ |
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JWKParameter::PARAM_KEY_TYPE, |
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JWKParameter::PARAM_MODULUS, |
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JWKParameter::PARAM_EXPONENT, |
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]; |
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/** |
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* Constructor. |
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* |
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* @param JWKParameter ...$params |
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* |
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* @throws \UnexpectedValueException If missing required parameter |
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*/ |
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public function __construct(JWKParameter ...$params) |
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{ |
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parent::__construct(...$params); |
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foreach (self::MANAGED_PARAMS as $name) { |
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if (!$this->has($name)) { |
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throw new \UnexpectedValueException( |
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"Missing '{$name}' parameter."); |
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} |
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} |
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if (KeyTypeParameter::TYPE_RSA !== $this->keyTypeParameter()->value()) { |
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throw new \UnexpectedValueException('Invalid key type.'); |
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} |
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} |
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/** |
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* Initialize from RSAPublicKey. |
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*/ |
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public static function fromRSAPublicKey(RSAPublicKey $pk): self |
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{ |
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$n = ModulusParameter::fromNumber($pk->modulus()); |
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$e = ExponentParameter::fromNumber($pk->publicExponent()); |
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$key_type = new KeyTypeParameter(KeyTypeParameter::TYPE_RSA); |
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return new self($key_type, $n, $e); |
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} |
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/** |
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* Initialize from PEM. |
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*/ |
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public static function fromPEM(PEM $pem): self |
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{ |
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return self::fromRSAPublicKey(RSAPublicKey::fromPEM($pem)); |
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} |
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/** |
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* Convert JWK to PEM. |
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*/ |
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public function toPEM(): PEM |
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{ |
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$n = $this->modulusParameter()->number()->base10(); |
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$e = $this->exponentParameter()->number()->base10(); |
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$pk = new RSAPublicKey($n, $e); |
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return PublicKeyInfo::fromPublicKey($pk)->toPEM(); |
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} |
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} |
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sop /
jwx
