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<?php |
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declare(strict_types = 1); |
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namespace Sop\JWX\JWS\Algorithm; |
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use Sop\JWX\JWA\JWA; |
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use Sop\JWX\JWK\JWK; |
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use Sop\JWX\JWK\RSA\RSAPrivateKeyJWK; |
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use Sop\JWX\JWK\RSA\RSAPublicKeyJWK; |
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use Sop\JWX\JWS\SignatureAlgorithm; |
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use Sop\JWX\JWT\Header\Header; |
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use Sop\JWX\JWT\Parameter\AlgorithmParameter; |
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/** |
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* Base class for algorithms implementing signature with PKCS #1. |
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* |
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* @see https://tools.ietf.org/html/rfc7518#section-3.3 |
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*/ |
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abstract class RSASSAPKCS1Algorithm extends OpenSSLSignatureAlgorithm |
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{ |
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/** |
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* Mapping from algorithm name to class name. |
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* |
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* @internal |
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* |
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* @var array |
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*/ |
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const MAP_ALGO_TO_CLASS = [ |
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JWA::ALGO_RS256 => RS256Algorithm::class, |
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JWA::ALGO_RS384 => RS384Algorithm::class, |
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JWA::ALGO_RS512 => RS512Algorithm::class, |
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]; |
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/** |
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* Constructor. |
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* |
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* @param RSAPublicKeyJWK $pub_key |
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* @param RSAPrivateKeyJWK $priv_key |
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*/ |
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protected function __construct(RSAPublicKeyJWK $pub_key, |
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RSAPrivateKeyJWK $priv_key = null) |
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{ |
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$this->_publicKey = $pub_key; |
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$this->_privateKey = $priv_key; |
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} |
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/** |
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* Initialize from a public key. |
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* |
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* @param RSAPublicKeyJWK $jwk |
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* |
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* @return self |
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*/ |
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public static function fromPublicKey(RSAPublicKeyJWK $jwk): self |
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{ |
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return new static($jwk); |
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} |
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/** |
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* Initialize from a private key. |
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* |
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* @param RSAPrivateKeyJWK $jwk |
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* |
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* @return self |
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*/ |
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public static function fromPrivateKey(RSAPrivateKeyJWK $jwk): self |
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{ |
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return new static($jwk->publicKey(), $jwk); |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @return self |
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*/ |
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public static function fromJWK(JWK $jwk, Header $header): SignatureAlgorithm |
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{ |
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$alg = JWA::deriveAlgorithmName($header, $jwk); |
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if (!array_key_exists($alg, self::MAP_ALGO_TO_CLASS)) { |
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throw new \UnexpectedValueException("Unsupported algorithm '{$alg}'."); |
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} |
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$cls = self::MAP_ALGO_TO_CLASS[$alg]; |
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if ($jwk->has(...RSAPrivateKeyJWK::MANAGED_PARAMS)) { |
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return $cls::fromPrivateKey(RSAPrivateKeyJWK::fromJWK($jwk)); |
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} |
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return $cls::fromPublicKey(RSAPublicKeyJWK::fromJWK($jwk)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function headerParameters(): array |
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{ |
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return array_merge(parent::headerParameters(), |
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[AlgorithmParameter::fromAlgorithm($this)]); |
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} |
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} |
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sop /
jwx
