/*
 * Copyright 2024 Gonçalo Frade
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import Foundation
import JSONWebKey

/// `KeyUnwrapping` is a protocol defining functionality for decrypting (unwrapping) an encrypted content encryption key (CEK).
public protocol KeyUnwrapping {
    /// Decrypts (unwraps) an encrypted content encryption key using a specified JSON Web Key (JWK) and additional arguments.
    /// - Parameters:
    ///   - encryptedKey: The encrypted content encryption key to be decrypted (unwrapped).
    ///   - using: The `JWK` used for the decryption process.
    ///   - arguments: An array of `KeyEncryptionArguments` providing additional information required for decryption.
    /// - Returns: The decrypted content encryption key as `Data`.
    /// - Throws: An error if key unwrapping fails. This could be due to incorrect keys, incompatible arguments, or other cryptographic issues.
    func contentKeyDecrypt(
        encryptedKey: Data,
        using: JWK,
        arguments: [KeyEncryptionArguments]
    ) throws -> Data
}
