Encrypt AES-256 in Boo

encrypt.boo

# AES-256 with key encryption function Boo Lang

public static def encrypt(cleartext as (byte), key as string) as (byte):
        using aesAlg = Aes.Create():
            salt = array(byte,[0x12,0x35,0x56,0x78,0x90,0xAB,0xAD,0xEF,0xDD,0x31])
            rfc = Rfc2898DeriveBytes(key,salt)
            aesAlg.Padding = PaddingMode.PKCS7
            aesAlg.KeySize = 256
            aesAlg.Key = rfc.GetBytes(32)
            aesAlg.IV = rfc.GetBytes(16)

            encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV)

            using encryptedData = MemoryStream():
                using cryptoStream = CryptoStream(encryptedData, encryptor, CryptoStreamMode.Write):
                    cryptoStream.Write(cleartext, 0, cleartext.Length)
                    cryptoStream.FlushFinalBlock()
                    return encryptedData.ToArray()