67 lines
1.8 KiB
PHP
67 lines
1.8 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Jose\Component\Encryption\Algorithm\KeyEncryption;
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use InvalidArgumentException;
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use Jose\Component\Core\JWK;
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use Jose\Component\Core\Util\RSAKey;
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use Jose\Component\Encryption\Algorithm\KeyEncryption\Util\RSACrypt;
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use Override;
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use function in_array;
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abstract readonly class RSA implements KeyEncryption
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{
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#[Override]
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public function allowedKeyTypes(): array
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{
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return ['RSA'];
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}
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/**
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* @param array<string, mixed> $completeHeader
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* @param array<string, mixed> $additionalHeader
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*/
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#[Override]
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public function encryptKey(JWK $key, string $cek, array $completeHeader, array &$additionalHeader): string
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{
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$this->checkKey($key);
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$pub = RSAKey::toPublic(RSAKey::createFromJWK($key));
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return RSACrypt::encrypt($pub, $cek, $this->getEncryptionMode(), $this->getHashAlgorithm());
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}
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/**
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* @param array<string, mixed> $header
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*/
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#[Override]
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public function decryptKey(JWK $key, string $encrypted_cek, array $header): string
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{
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$this->checkKey($key);
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if (! $key->has('d')) {
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throw new InvalidArgumentException('The key is not a private key');
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}
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$priv = RSAKey::createFromJWK($key);
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return RSACrypt::decrypt($priv, $encrypted_cek, $this->getEncryptionMode(), $this->getHashAlgorithm());
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}
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#[Override]
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public function getKeyManagementMode(): string
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{
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return self::MODE_ENCRYPT;
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}
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protected function checkKey(JWK $key): void
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{
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if (! in_array($key->get('kty'), $this->allowedKeyTypes(), true)) {
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throw new InvalidArgumentException('Wrong key type.');
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}
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}
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abstract protected function getEncryptionMode(): int;
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abstract protected function getHashAlgorithm(): ?string;
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}
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