Beispiel #1
0
        public static void Bob()
        {
            var dh = new DiffieHellman();

            var input = Console.ReadLine();
            var gpA   = input.Split(' ');
            var g     = BigInteger.Parse(gpA[0]);
            var p     = BigInteger.Parse(gpA[1]);
            var A     = BigInteger.Parse(gpA[2]);

            var B = dh.BobPass((g, p, A));
            var k = dh.BobCulcK();

            Console.Write(B.ToString());

            input = Console.ReadLine();
            var gpy = input.Split(' ');

            g = BigInteger.Parse(gpy[0]);
            p = BigInteger.Parse(gpy[1]);
            var y = BigInteger.Parse(gpy[2]);

            var elg = new Elgamal(g, p, y);

            var reader = new BinaryReader(File.Open($"tests/tttt.txt", FileMode.Open));
            var bytes  = reader.ReadBytes((int)reader.BaseStream.Length);
            var ans    = bytes.Xor(k.ToByteArray());
            var r      = ans.Skip(32 * 3).Take(32).ToArray();
            var s      = ans.Skip(32 * 4).Take(32).ToArray();
            var m      = ans.Skip(32 * 5).ToArray();
            var f      = elg.Check(m, (new BigInteger(r), new BigInteger(s)));

            Console.Write(f);
        }
Beispiel #2
0
        public static void Alice()
        {
            var reader = new BinaryReader(File.Open($"tests/tt.txt", FileMode.Open));
            var writer = new BinaryWriter(File.Open($"tests/ttt.txt", FileMode.Create));

            var(n, e, d) = KeyGenerator.GetRsaKeys();
            var rsa = new Rsa(n, e, d);

            rsa.Encrypt(reader, writer);
            reader = new BinaryReader(File.Open($"tests/ttt.txt", FileMode.Open));
            var M  = reader.ReadBytes((int)reader.BaseStream.Length);
            var dh = new DiffieHellman();

            var(g, p, A) = dh.AlicePass();
            Console.WriteLine(g + " " + p + " " + A);
            var B = BigInteger.Parse(Console.ReadLine());

            dh.AliceSetB(B);
            var K       = dh.AliceCulcK();
            var elgamal = new Elgamal();

            Console.WriteLine(elgamal.g + " " + elgamal.p + " " + elgamal.y);
            var sha  = new SHA256Managed();
            var m    = sha.ComputeHash(M);
            var pack = elgamal.GetMessagePack(m);
            var res  = pack.Xor(K.ToByteArray());

            writer = new BinaryWriter(File.Open($"tests/tttt.txt", FileMode.Create));
            writer.Write(res);
            writer.Close();
        }