// -*- go -*-
//
// Copyright (c) 2020-2021 Markku Rossi
//
// All rights reserved.
//

// Package aes implements the Advanced Encryption Standard (AES)
// block cipher operations.
package aes

// BlockSize defines the AES cipher block size in bytes.
const BlockSize = 16

// EncryptBlock encrypts one data block with the key. The key must be
// 16, 24, or 32 bytes long.
func EncryptBlock(key []byte, data [BlockSize]byte) [BlockSize]byte {
	enc := ExpandEncryptionKey(key)

	var dst [BlockSize]byte

	return EncryptBlockExpanded(enc, dst, data)
}

// DecryptBlock decrypts one data block with the key. The key must be
// 16, 24, or 32 bytes long.
func DecryptBlock(key []byte, data [BlockSize]byte) [BlockSize]byte {
	enc, dec := ExpandKey(key)

	var dst [BlockSize]byte

	return DecryptBlockExpanded(dec, dst, data)
}