/**
* @param JWAInterface $algorithm
*
* @return self
*/
public function addAlgorithm(JWAInterface $algorithm)
{
if (!$this->isAlgorithmSupported($algorithm->getAlgorithmName())) {
$this->algorithms[$algorithm->getAlgorithmName()] = $algorithm;
}
return $this;
}
/**
* @param \Jose\JWAInterface $key_encryption_algorithm
* @param \Jose\Operation\ContentEncryptionInterface $content_encryption_algorithm
* @param \Jose\JWKInterface $key
* @param string|null $encrypted_cek
* @param array $header
*
* @return string
*/
public function getCEK(JWAInterface $key_encryption_algorithm, ContentEncryptionInterface $content_encryption_algorithm, JWKInterface $key, $encrypted_cek, array $header)
{
if ($key_encryption_algorithm instanceof DirectEncryptionInterface) {
return $key_encryption_algorithm->getCEK($key, $header);
} elseif ($key_encryption_algorithm instanceof KeyAgreementInterface) {
return $key_encryption_algorithm->getAgreementKey($content_encryption_algorithm->getCEKSize(), $key, null, $header);
} elseif ($key_encryption_algorithm instanceof KeyAgreementWrappingInterface) {
return $key_encryption_algorithm->unwrapAgreementKey($key, $encrypted_cek, $content_encryption_algorithm->getCEKSize(), $header);
} elseif ($key_encryption_algorithm instanceof KeyEncryptionInterface) {
return $key_encryption_algorithm->decryptKey($key, $encrypted_cek, $header);
} else {
throw new \RuntimeException('Unsupported CEK generation');
}
}