Org.BouncyCastle.Crypto.Engines.VmpcEngine.Init C# (CSharp) Метод

        public virtual void Init(
            bool				forEncryption,
            ICipherParameters	parameters)
        {
            if (!(parameters is ParametersWithIV))
                throw new ArgumentException("VMPC Init parameters must include an IV");

            ParametersWithIV ivParams = (ParametersWithIV) parameters;

            if (!(ivParams.Parameters is KeyParameter))
                throw new ArgumentException("VMPC Init parameters must include a key");

            KeyParameter key = (KeyParameter)ivParams.Parameters;

            this.workingIV = ivParams.GetIV();

            if (workingIV == null || workingIV.Length < 1 || workingIV.Length > 768)
                throw new ArgumentException("VMPC requires 1 to 768 bytes of IV");

            this.workingKey = key.GetKey();

            InitKey(this.workingKey, this.workingIV);
        }

		public override void PerformTest()
		{
			byte[] key = Hex.Decode("9661410AB797D8A9EB767C21172DF6C7");
			byte[] iv = Hex.Decode("4B5C2F003E67F39557A8D26F3DA2B155");
			ICipherParameters kp = new KeyParameter(key);
			ICipherParameters kpwiv = new ParametersWithIV(kp, iv);

			VmpcEngine engine = new VmpcEngine();

			try
			{
				engine.Init(true, kp);
				Fail("Init failed to throw expected exception");
			}
			catch (ArgumentException)
			{
				// Expected
			}

			engine.Init(true, kpwiv);
			checkEngine(engine);

			engine.Reset();
			byte[] output = checkEngine(engine);

			engine.Init(false, kpwiv);
			byte[] recovered = new byte[output.Length];
			engine.ProcessBytes(output, 0, output.Length, recovered, 0);

			if (!Arrays.AreEqual(input, recovered))
			{
				Fail("decrypted bytes differ from original bytes");
			}
		}