LISTING PROGRAM
Kode Program Class Enkrip
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Numerics; using System.IO; namespace test1 { class enkrip {public int[] cipher(int p, int ea, int[] arrayint) {
BigInteger e = 0;
//stringtochar arrchar = new stringtochar();
//char[] arraychar = arrchar.arrasci(text);
//int[] arrayint = new int[arraychar.Length];
int key = ea; int prime = p;
for (int i = 0; i <= arrayint.Length - 1; i++) {
// arrayint[i] = (int)arraychar[i];
e = BigInteger.ModPow(arrayint[i], key, prime); arrayint[i] = (int)e;
}
return arrayint; }
public void buatfiletextpengirim(string text, string filename) {
string direktoriawal = Directory.GetCurrentDirectory(); if (!Directory.Exists(direktoriawal + "/Pengirim")) {
Directory.CreateDirectory(direktoriawal + "/Pengirim"); }
System.IO.File.WriteAllText(direktoriawal + "/Pengirim/" + filename, text);
}
public void buatfiletextpenerima(string text, string filename) {
string direktoriawal = Directory.GetCurrentDirectory(); if (!Directory.Exists(direktoriawal + "/Penerima")) {
Directory.CreateDirectory(direktoriawal + "/Penerima"); }
System.IO.File.WriteAllText(direktoriawal + "/Penerima/" + filename, text);
} } }
Kode Program Class Dekrip
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Numerics; namespace test1 { class dekrip {public int[] plaintxt(int p, int[] enkripted, BigInteger da) {
BigInteger e = 0;
//enkrip ciphertext = new enkrip();
int[] arrayint = new int[enkripted.Length]; for (int i = 0; i <= enkripted.Length - 1; i++) {
arrayint[i] = (int)enkripted[i]; }
BigInteger key = da; int prime = p;
for (int i = 0; i <= arrayint.Length - 1; i++) {
e = BigInteger.ModPow(arrayint[i], key, prime); arrayint[i] = (int)e;
}
/*char[] hasildekrip = new char[arrayint.Length]; for (int j = 0; j <= arrayint.Length - 1; j++) {
hasildekrip[j] = (char)arrayint[j]; }
string result = string.Join("", hasildekrip);
System.IO.File.WriteAllText("C:/Users/Asus/Documents/Visual Studio 2012/Projects/test1/dekripted.txt", result);*/ return arrayint; } } }
Kode Program Class Embed
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Drawing; using System.Drawing.Imaging; namespace ConsoleApplication2 { class embed { int q = 0; int r = 0; int s = 0;convertbiner binertext = new convertbiner();
public string replacebit(string a, int posisi, string b) {
var aStringBuilder = new StringBuilder(a); aStringBuilder.Remove(posisi-1, 1);
aStringBuilder.Insert(posisi-1, b); return aStringBuilder.ToString(); }
public int tanambiner(string binaryawal, char rgb, string text) {
string[] binertexta = binertext.splittext(text); //int c = 0;
int i; ulang:
for ( i = q; i < binertexta[r].Length; i++) { string g; string d = binertexta[r].Substring(i, 1); if (rgb == 'r') { g = replacebit(binaryawal, 8, d); q = q + 1; } else if (rgb == 'g') { g = replacebit(binaryawal, 7, d); q = q + 1; } else { g = replacebit(binaryawal, 6, d); q = q + 1; } // a2 = a+1; return Convert.ToInt32(g, 2); } // if ((rgb == 'g') || (rgb == 'b')) // { if (r == binertexta.Length-1) { return Convert.ToInt32(binaryawal, 2); } q = 0; r++; goto ulang; // } /* else { return Convert.ToInt32(binaryawal, 2); } */ }
public int ubahalpha(int alpha, string text) {
int t = s;
string[] binertexta = binertext.splittext(text); if (t <= binertexta.Length-1) { s = s + 1; return ((binertexta[t].Length * 10) + 104); } else { s = s + 1; return 255; } }
public int menambahintensitas(int x) { if (x < 128) { x = x + 128; } return x; }
public int mengurangiintensitas(int colorawal, int x) { if (colorawal < 128) { x = x - 128; } return x; }
public int buatgambar(Bitmap img, string text, string filehasil) {
string r, g, b;
int nr, ng, nb, R, G, B, A; int na = 0;
//Bitmap img = new Bitmap(@"C:\Users\Asus\Documents\Visual Studio 2012\Projects\ls test\a.bmp");
Bitmap gr = new Bitmap(img.Width, img.Height);
for (int y = 0; y < img.Height; y++) {
for (int x = 0; x < img.Width; x++) {
//a = 0;
Color pixel = img.GetPixel(x, y); R = img.GetPixel(x, y).R; G = img.GetPixel(x, y).G; B = img.GetPixel(x, y).B; A = img.GetPixel(x, y).A; r = binertext.inttobiner(menambahintensitas(R)); g = binertext.inttobiner(menambahintensitas(G)); b = binertext.inttobiner(menambahintensitas(B)); //int s = 100;
nr = mengurangiintensitas( R, tanambiner(r, 'r', text)); ng = mengurangiintensitas( G, tanambiner(g, 'g', text)); nb = mengurangiintensitas( B, tanambiner(b, 'b', text)); na = ubahalpha(A, text);
gr.SetPixel(x, y, Color.FromArgb(na, nr, ng, nb)); // using (Graphics gfx = Graphics.FromImage(bitmap)
//buat gambar } }
//img.DrawToImage(img, new Rectangle(0, 0, img.Width, img.Height));
//gr.Save("c:/temp/hasil.bmp", ImageFormat.Bmp); gr.Save(filehasil); return 0; } } }
Kode Program Class Ekstrak
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Drawing; namespace ConsoleApplication2 { class ekstrak {//Bitmap img = new Bitmap(@"C:\Users\Asus\Documents\Visual Studio 2012\Projects\ls test\hasil.bmp");
convertbiner binertext = new convertbiner(); embed intensitas = new embed();
public string ambilbiner(string binary, char rgb) { string g; if (rgb == 'r') { g = binary.Substring(7, 1); return g; } else if (rgb == 'g') { g = binary.Substring(6, 1); return g; } else { g = binary.Substring(5, 1); return g; } }
public int ekstrakdata(Bitmap img, string filehasil) { int R, G, B, A; int a = 0; int i = 0; int j = 0; string r, g, b, fr, fg, fb; string q = ""; //int s = 0; //string stringa = "";
int[] stringa = new int[img.Height * img.Width]; for (int y = 0; y < img.Height; y++)
{
for (int x = 0; x < img.Width; x++) {
Color pixel = img.GetPixel(x, y); R = img.GetPixel(x, y).R; G = img.GetPixel(x, y).G; B = img.GetPixel(x, y).B; A = img.GetPixel(x, y).A; r = binertext.inttobiner(intensitas.menambahintensitas(R)); g = binertext.inttobiner(intensitas.menambahintensitas(G)); b = binertext.inttobiner(intensitas.menambahintensitas(B)); if ( A == 255) { stringa[i] = A; i++; } else { a = (A - 104) / 10; stringa[i] = a; i++; j++; } fr = ambilbiner(r, 'r'); fg = ambilbiner(g, 'g'); fb = ambilbiner(b, 'b'); //stringa[i] = a;
//stringa += string.Join("", a);
q += string.Join("", fr, fg, fb);
} }
// string[] stringb = stringa.Split(';');
int z; int v = 0;
int[] intrgb = new int[j];
for (int l = 0; l <= stringa.Length; l++) {
//z = Int32.Parse(stringb[i]);
z = stringa[l]; if (z == 255)
{ break; } intrgb[l] = Convert.ToInt32(q.Substring(v, z), 2); v += (z ); }
string result = string.Join(";", intrgb); // binary to int
// int to text file
System.IO.File.WriteAllText(filehasil, result); return 0; } } }
Kode Program Class Kripto
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Numerics; namespace test1 {public class kripto {
public string gettext(string path) {
return System.IO.File.ReadAllText(path); }
public int random(int a) {
Random rand = new Random(); if (a < 256) { int p = rand.Next(256, 25000); return p; } else { int p = rand.Next(a, 25000); return p; } }
public int rand(int b) {
Random rand = new Random(); int p = rand.Next(2, b); return p;
}
public bool test(int p, int b, double m) { int a = rand(p); int j = 0; double z = Math.Pow(a, m) % p; if ((z == 1) || (z == p - 1)) {
ulang4: if ((j > 0) && (z == 1)) { return false; } j = j + 1; if ((j < b) && (z != p -1)) { z = Math.Pow(z, 2) % p; goto ulang4; } if (z == p -1) { if ((j == b) && (z != p - 1)) { return false; } return true; } return true; } return false; }
public int prima(int textlenght) { ganjil: int cek = 0; int p =random(textlenght); if (p % 2 == 0) { if (p == 25000) { p--; } else p++; } if ((p % 3 == 0) || (p % 5 == 0) || (p % 7 == 0) || (p % 11 == 0) || (p % 13 == 0) || (p % 17 == 0) || (p % 19 == 0)) { goto ganjil; } int b = 0; double m = 0; do { b++; m = (p - 1) / Math.Pow(2, b); } while (m % 2 == 0); do { if (test(p, b, m) == true) { cek++; }
else goto ganjil; } while (cek <= 2000);
//Console.WriteLine("m ="+m);
return p; }
public int kea(int p) { int b = p - 1; int c = 0; int a = 0; int eA = 0; do { eA = rand(b); a = GCD(b,eA, c); } while (a != 1); return eA; }
public BigInteger kda(int p, int eA) {
BigInteger p1 = p - 1, eA1 = eA; BigInteger a = p1, da = 0, b = 1; while (eA1 > 0)
{
BigInteger t = a / eA1, x = eA1; eA1 = a % x; a = x; x = b; b = da - t * x; da = x; } da %= p1; if (da < 0) da = (da + p1) % p1; return da; }
public int GCD(int b, int A, int c) { c = b % A; while (c != 0) { b = A; A = c; c = b % A; } return A; } } }
