hraskeygenerator.java~

文件加密解密程序。内含公开暗号（RAS）加解密工具

                privatekey = i;
                jTextArea1.append("p = " + p + ",\tq = " + q + "\n");
                jTextArea1.append("Public key is\t" + publickey + "\nPrivate key is\t" + privatekey + "\nModulus is\t" + modulus + "\n\n");
                return;
            }
        }
        jTextArea1.append("Could not find a private key in [ 0 - " + maximum + " ]\n"); 
    }//GEN-LAST:event_jButton3ActionPerformed

    private void jCheckBox1StateChanged(javax.swing.event.ChangeEvent evt) {//GEN-FIRST:event_jCheckBox1StateChanged
        // 張棟僐乕僪傪偙偙偵捛壛偟傑偡:
        // Random status changed
        if (jCheckBox1.isSelected()){
            this.jTextField1.setText("3");
            this.jTextField2.setText("300");
            this.jLabel1.setText("From");
            this.jLabel2.setText("To");
        }else{
            this.jTextField1.setText("");
            this.jTextField2.setText("");
            this.jLabel1.setText("Origin1");
            this.jLabel2.setText("Origin2");
        }
    }//GEN-LAST:event_jCheckBox1StateChanged

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        // 張棟僐乕僪傪偙偙偵捛壛偟傑偡:
        // Run
        jComboBox1.setEditable(false);
        this.jComboBox1.removeAllItems();
        boolean rand = jCheckBox1.isSelected();
        this.p = -1;
        this.q = -1;
        this.publickey = -1;
        this.privatekey = -1;
        try{
            maximum = Integer.valueOf(jTextField5.getText()).intValue();
        }catch(Exception e){
            jTextField5.setText("");
            jTextArea1.append("Must be a number value. \n");
            return;
        }
        int from,to;
        try{
            from = Integer.valueOf(jTextField1.getText()).intValue();
        }catch(Exception e){
            jTextField1.setText("");
            jTextArea1.append("Must be a number value. \n");
            return;
        }
        try{
            to = Integer.valueOf(jTextField2.getText()).intValue();
        }catch(Exception e){
            jTextField2.setText("");
            jTextArea1.append("Must be a number value. \n");
            return;
        }
        if (from >= to){
            jTextField2.setText("");
            return;
        }
        if (to >= limit){
            HUtil.HDialog.HYNDialog yndialog = new HUtil.HDialog.HYNDialog(this, true);
            yndialog.setTitle("Continue ?");
            yndialog.setMsgText("Warning: \n'" + to + "' is so large, the calculation maybe \ntake uncanny long time. ");
            yndialog.show();
            if (!yndialog.getResult()){
                return;
            }
        }
        if (rand){
            //random
            boolean b = false;
            for (int i=0;i<this.maximum;i++){
                p = rand(from,to);
                if(isPrime(p)){
                    break;
                }
            }
            //jTextArea1.append("p = " + p + " \n"); 
            for (int i=0;i<this.maximum;i++){
                q = rand(from,to);
                if((p!=q)&&(isPrime(q))){
                    b = true;
                    break;
                }
            }
            //jTextArea1.append("q = " + q + " \n"); 
            if (!b){
                jTextArea1.append("Could not find p and q in [ 0 - " + this.maximum + " ]\n"); 
                return;
            }
        }else{
            //not random
            if (this.isPrime(from)){
                p = from;
            }else{
                jTextField1.setText("");
                jTextArea1.append("Must be a prime number. \n");
                return;
            }
            if (this.isPrime(to)){
                q = to;;
            }else{
                jTextField2.setText("");
                jTextArea1.append("Must be a prime number. \n");
                return;
            }
            
        }
        modulus = p*q;
        //get modulus
        this.jTextField3.setText(modulus+"");
        //get public key
        //ArrayList arrPublicKey = new ArrayList();
        int[] pf = getPrimeFactor((p-1)*(q-1));
        for (int i=3;i<modulus;i++){
            if (!hasCommonPrimeFactor(i, pf)){
                //arrPublicKey.add(new Integer(i));
                this.jComboBox1.addItem(i+""); 
            }
        }
        //if (jComboBox1.countComponents()>0){
        //    jComboBox1.setEditable(true);
        //}
    }//GEN-LAST:event_jButton1ActionPerformed
    
    public boolean isPrivateKey(int p, int q, int publickey, int privatekey){
        if ((publickey*privatekey)%((p-1)*(q-1))==1){
            return true;
        }else{
            return false;
        }
    }
    
    public boolean hasCommonPrimeFactor(int in, int[] primeFactor){
        boolean result = false;
        for(int i=0;i<primeFactor.length;i++){
            if (in%primeFactor[i]==0){
                result = true;
            }
        }
        return result;
    }
        
    public int[] getPrimeFactor(int in){
        int[] temp = new int[in];
        int[] result;
        int cnt = -1;
        for (int i=2;i<in;i++){
            if (isPrime(i)||(i==2)){
                if (in%i==0){
                    cnt ++;
                    temp[cnt] = i;
                }
            }
        }
        result = new int[cnt+1];
        for(int i=0;i<=cnt;i++){
            result[i] = temp[i];
        }
        return result;
    }
        
    public boolean isPrime(int in){
        boolean result = true;
        for (int i=2;i<in;i++){
            if (in%i == 0){
                result = false;
                break;
            }
        }
        return result;
    }
    
    public int rand(int from, int to){
        int result;
        result = from + (int)(Math.random() * (Math.abs(to - from)));
        return result;
    }
    
    /** Exit the Application */
    private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
        System.exit(0);
    }//GEN-LAST:event_exitForm
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        new HRasKeyGenerator().show();
    }
    
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JLabel jLabel4;
    private javax.swing.JButton jButton2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JPanel jPanel4;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JTextField jTextField3;
    private javax.swing.JLabel jLabe6;
    private javax.swing.JPanel jPanel3;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JButton jButton1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JButton jButton3;
    private javax.swing.JPanel jPanel5;
    private javax.swing.JTextField jTextField5;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JPanel jPanel7;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JPanel jPanel6;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JCheckBox jCheckBox1;
    private javax.swing.JTextField jTextField4;
    private javax.swing.JLabel jLabel5;
    // End of variables declaration//GEN-END:variables
    
}