//
//  CryptoSwift
//
//  Copyright (C) 2014-2017 Marcin Krzyżanowski <marcin@krzyzanowskim.com>
//  This software is provided 'as-is', without any express or implied warranty.
//
//  In no event will the authors be held liable for any damages arising from the use of this software.
//
//  Permission is granted to anyone to use this software for any purpose,including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
//
//  - The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation is required.
//  - Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
//  - This notice may not be removed or altered from any source or binary distribution.
//

public typealias CipherOperationOnBlock = (_ block: ArraySlice<UInt8>) -> Array<UInt8>?

public protocol BlockMode {
  var options: BlockModeOption { get }
  //TODO: doesn't have to be public
  @inlinable func worker(blockSize: Int, cipherOperation: @escaping CipherOperationOnBlock, encryptionOperation: @escaping CipherOperationOnBlock) throws -> CipherModeWorker

  var customBlockSize: Int? { get }
}

typealias StreamMode = BlockMode
