Example #1
0
        public void Encrypt()
        {
            List <char> seed = new List <char>();

            for (int i = 0; i < StringSeed.Count(); i++)
            {
                //seed.Add(int.Parse(StringSeed[i].ToString()));
                seed.Add(StringSeed[i]);
            }

            foreach (string stream in Bytes)
            {
                //List<int> x = new List<int>();
                //List<int> y = new List<int>();
                //List<int> seed = new List<int>();

                string outByte = "";

                /*
                 * for (int i = 0; i < stream.Count(); i++)
                 * {
                 *  x.Add(int.Parse(stream[i].ToString()));
                 *  //y.Add(0);
                 * }
                 */

                for (int i = 0; i < stream.Count(); i++)
                {
                    int xorCounter = 0;

                    for (int j = 0; j < Polynomial.Count(); j++)
                    {
                        if (Polynomial[j] == '1' && seed[j] == '1')
                        {
                            xorCounter++;
                        }
                    }

                    if (stream[i] == '1')
                    {
                        xorCounter++;
                    }
                    //y[i] = (x[i] + y[i]) % 2;
                    outByte += xorCounter % 2;

                    for (int j = seed.Count() - 1; j > 0; j--)
                    {
                        seed[j] = seed[j - 1];
                    }
                    seed[0] = outByte[i];
                }
                output.Add(outByte);
            }
        }
Example #2
0
        public void Decrypt()
        {
            List <int> seed = new List <int>();

            for (int i = 0; i < StringSeed.Count(); i++)
            {
                seed.Add(int.Parse(StringSeed[i].ToString()));
            }

            foreach (string stream in Bytes)
            {
                List <int> x = new List <int>();
                List <int> y = new List <int>();

                for (int i = 0; i < stream.Count(); i++)
                {
                    x.Add(int.Parse(stream[i].ToString()));
                    y.Add(0);
                }

                for (int i = 0; i < x.Count(); i++)
                {
                    for (int j = 0; j < F.Count(); j++)
                    {
                        if (F[j] == 1)
                        {
                            y[i] += seed[j];
                        }
                    }

                    y[i] = (x[i] + (y[i] % 2)) % 2;

                    for (int j = seed.Count() - 1; j > 0; j--)
                    {
                        seed[j] = seed[j - 1];
                    }
                    seed[0] = x[i];
                }
                output.Add(ByteToString(y));
            }
        }