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<?php |
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declare(strict_types = 1); |
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namespace Sop\CryptoTypes\Asymmetric; |
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use Sop\CryptoEncoding\PEM; |
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use Sop\CryptoTypes\AlgorithmIdentifier\Feature\AlgorithmIdentifierType; |
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/** |
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* Base class for private keys. |
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*/ |
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abstract class PrivateKey |
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{ |
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/** |
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* Get the private key algorithm identifier. |
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* |
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* @return AlgorithmIdentifierType |
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*/ |
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abstract public function algorithmIdentifier(): AlgorithmIdentifierType; |
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/** |
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* Get public key component of the asymmetric key pair. |
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* |
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* @return PublicKey |
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*/ |
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abstract public function publicKey(): PublicKey; |
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/** |
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* Get DER encoding of the private key. |
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* |
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* @return string |
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*/ |
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abstract public function toDER(): string; |
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/** |
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* Get the private key as a PEM. |
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* |
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* @return PEM |
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*/ |
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abstract public function toPEM(): PEM; |
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/** |
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* Get the private key as a PrivateKeyInfo type. |
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* |
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* @return PrivateKeyInfo |
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*/ |
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public function privateKeyInfo(): PrivateKeyInfo |
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{ |
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return PrivateKeyInfo::fromPrivateKey($this); |
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} |
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/** |
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* Initialize private key from PEM. |
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* |
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* @param PEM $pem |
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* |
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* @throws \UnexpectedValueException |
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* |
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* @return PrivateKey |
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*/ |
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public static function fromPEM(PEM $pem) |
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{ |
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switch ($pem->type()) { |
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case PEM::TYPE_RSA_PRIVATE_KEY: |
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return RSA\RSAPrivateKey::fromDER($pem->data()); |
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case PEM::TYPE_EC_PRIVATE_KEY: |
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return EC\ECPrivateKey::fromDER($pem->data()); |
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case PEM::TYPE_PRIVATE_KEY: |
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return PrivateKeyInfo::fromDER($pem->data())->privateKey(); |
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} |
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throw new \UnexpectedValueException( |
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'PEM type ' . $pem->type() . ' is not a valid private key.'); |
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} |
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} |
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sop /
crypto-types
