# AES-256 with key decryption function Boo Lang

public static def decrypt(ciphertext 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)

            decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV)

            using decryptedData = MemoryStream():
                using cryptoStream = CryptoStream(decryptedData, decryptor, CryptoStreamMode.Write):
                    cryptoStream.Write(ciphertext, 0, ciphertext.Length)
                    cryptoStream.FlushFinalBlock()
                    return decryptedData.ToArray()