public static function decodeCek($encryptionMaterials, $cekEncrypted)
{
$encrypKeyAlg = EncryptionUtil::getKeyEncryptionAlgm($encryptionMaterials);
if ($encrypKeyAlg === "AES") {
$secretKey = $encryptionMaterials;
$cek = EncryptionUtil::decode_AES_ECB($cekEncrypted, $secretKey);
if (empty($cek)) {
throw new Ks3ClientException("can not decode cek useing AES,secret key maybe not correct");
}
} else {
if ($encrypKeyAlg === "RSA") {
$cek = "";
openssl_private_decrypt($cekEncrypted, $cek, $encryptionMaterials[1]);
if (empty($cek)) {
throw new Ks3ClientException("can not decode cek useing RSA,public/private key pair maybe not correct");
}
}
}
return $cek;
}
