cheman
-
Modifié par crapoulou le 19/03/2017 à 17:17
cheman -
19 mars 2017 à 18:18
Salut, j’aimerais faire un programme de chiffrement et de déchiffrement Elgamal en java en utilisant GUI j'ai des soucis a le compile
voile le code source
package projet.java.cryptographie;
/* @author pc */
import java.io.Serializable;
import java.math.BigInteger;
import java.security.SecureRandom;
public class essai {
public static void main (String[] args ){
class chiffre {
public BigInteger p,g,a,h,d;
SecureRandom sr = new SecureRandom ();
chiffre (BigInteger p,BigInteger g,BigInteger a,BigInteger h, BigInteger d ){
this p= p;
this g = g;
this a= a;
this h= h;
this d= d;
}
public BigInteger[] cle1(){
p = BigInteger.probablePrime(1024, sr);
d =p.subtract(java.math.BigInteger.ONE);
do{
g=new java.math.BigInteger (64,sr);
}
while(g.modPow(d,p).intValue() != 1);
a=new BigInteger(512,sr);
h=g.modPow(a, p);
BigInteger k = new BigInteger (128,sr);
BigInteger c1=g.modPow(k,p);
BigInteger c2= (h.modPow(k, p).mod(p));
BigInteger [] c = { c1 , c2 };
return c;
}
}
public class essai extends javax.swing.JPanel {
}
/* Creates new form essai */
/* This method is called from within the constructor to initialize the form.
WARNING: Do NOT modify this code. The content of this method is always
regenerated by the Form Editor. */
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jScrollPane1.setViewportView(jTextArea1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(53, 53, 53)
.addComponent(jButton1))
.addGroup(layout.createSequentialGroup()
.addGap(29, 29, 29)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addContainerGap(205, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(3, 3, 3)
.addComponent(jButton1)
.addContainerGap(163, Short.MAX_VALUE))
);
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
cle1();
String mess = jTextArea1.getText();
BigInteger m = new BigInteger(mess.getBytes());
cle chiffre = new chiffre;
chiffre = c[1].multiply(m);
c2 = c2.mod(p);
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea jTextArea1;
// End of variables declaration
}
EDIT : Ajout des balises de code (la coloration syntaxique). Explications disponibles ici : ICI
Modifié par KX le 19/03/2017 à 18:20
import java.math.BigInteger; import java.security.SecureRandom; import java.util.Scanner; /** * * @author pc */ public class ELGamal1 { public static void main (String[] args ){ SecureRandom sr = new SecureRandom (); BigInteger p,g,a,h,d; p=BigInteger.probablePrime(1024, sr); d =p.subtract(BigInteger.ONE); do{ g=new BigInteger (64,sr); } while(g.modPow(d,p).intValue() != 1); a=new BigInteger(512,sr); h=g.modPow(a, p); Scanner sc = new Scanner(System.in); System.out.println("entre le message"); String mess = sc.nextLine(); BigInteger m = new BigInteger(mess.getBytes()); BigInteger k = new BigInteger(128,sr); BigInteger c1=g.modPow(k,p); BigInteger c2= m.multiply(h.modPow(k, p).mod(p)); BigInteger dechiffre = c1.modPow(d.subtract(a), p).multiply(c2).mod(p); System.out.println("le message chiffre est :"+new String(c2.toByteArray())); System.out.println("le dechiffre est :"+new String(dechiffre.toByteArray())); } }