playfair1.java

Play Fair in java encrption and decryption file

    }//GEN-LAST:event_srcPathActionPerformed

    private void srcBrowseActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_srcBrowseActionPerformed

        srcInt=src.showOpenDialog(this);

        if(srcInt!=src.APPROVE_OPTION) {
            javax.swing.JOptionPane.showMessageDialog(this,"Please Rechoose Source File ","Bad Selection File",javax.swing.JOptionPane.ERROR_MESSAGE);
            return;
        }
        srcFile=src.getSelectedFile();
        srcPath.setText(srcFile.getPath());
}//GEN-LAST:event_srcBrowseActionPerformed

    private void desBrowseActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_desBrowseActionPerformed



        desInt=des.showSaveDialog(this);
        if(desInt!=des.APPROVE_OPTION) {
            javax.swing.JOptionPane.showMessageDialog(this,"Please Rechoose Destination File","Bad Selection File",javax.swing.JOptionPane.ERROR_MESSAGE);
            return;
        }
        desFile=des.getSelectedFile();
        desPath.setText(desFile.getPath());
}//GEN-LAST:event_desBrowseActionPerformed

    private void EncodeActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_EncodeActionPerformed


getkey();
        befor=after="";
        try {
            read=new java.io.FileInputStream(srcFile);
            
         char c[] = new char[100];
         char c1[]= new char[100];
        char c2[]= new char[100];
        int len = 0;
        int ch=-1;
            while((ch=read.read())!=-1)
            {
                befor+=(char)ch;
            }
            read.close();
            read=null;
            for(int i1=0;i1<befor.length();i1++) {
                 ch=(int)befor.charAt(i1);
             if(ch>='a' && ch<='z' ){
                c[len] =(char) ch;
                len++;
            }

       
        int flag = 0;
        int nx = 0;
        
        int size = len;
        System.out.println(size);
        for( int i = 0; i < size; i++){
             c1[i] =  c[i];
        }
        for( int i = 0; i < size/2; i++ ){
            if(flag != 0){
                i = 0;
                flag = 0;
            }
            if(c1[i*2]==c1[i*2+1] ){
                for(int j = size ;j>=i*2+1;j--){
                    System.out.println(j);
                    c1[j] = c1[j - 1];
                }
                    c1[i*2+1] = 'x';
                    nx++;
                    flag=1;
                    ++size;
            }
        }
        if( (size%2)!= 0){
            System.out.println(size);
            c1[size] = 'x';
            size=size + 1;
        }
        int r1 = 0, l1 = 0, r2 = 0, l2 = 0;
        for(int g = 0; g < size/2; g++){
            for(int i = 0; i < 5; i++){
                for(int j = 0; j < 5; j++){
                    if(c1[2*g] == key[i][j]){
                        r1 = i;
                        l1 = j;
                    }
                    if(c1[2*g+1]== key[i][j]){
                        r2 = i;
                        l2 = j;
                    }
                }
            }
            if(r2 == r1){
                c2[2*g] = key[r1][ (l1+1) % 5];
                c2[2*g+1]=key[r2][ (l2+1) % 5];
            }
            else if(l1 == l2){
                c2[2*g] = key[(r1+1) % 5][l1];
                c2[2*g+1]=key[(r2+1) % 5][l2];
            }
            else{
                c2[2*g] = key[r1][l2];
                c2[2*g+1]=key[r2][l1];
            }
        }
        char decode[] = new char[size];
        for(int i = 0; i < size; i++){
           //after+= (char)c2[i];
            decode[i] = c2[i];
             //after+=(char)decode[i];
        }
         after=new String(decode);
       
            }


            write=new java.io.FileOutputStream(desFile);
            for(int i=0;i<after.length();i++) {
                write.write(after.charAt(i));
            }
            write.close();
            write=null;

        } catch(java.io.IOException e) {
            javax.swing.JOptionPane.showMessageDialog(this,e,"Bad Selection File",javax.swing.JOptionPane.ERROR_MESSAGE);
            javax.swing.JOptionPane.showMessageDialog(this,"Process completed UnSuccessfully","Process message",javax.swing.JOptionPane.INFORMATION_MESSAGE);
            return;
        }
        javax.swing.JOptionPane.showMessageDialog(this,"Process completed Successfully","Process message",javax.swing.JOptionPane.INFORMATION_MESSAGE);
}//GEN-LAST:event_EncodeActionPerformed

    private void DecodeActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_DecodeActionPerformed
getkey();
        befor=after="";
        try {
            read=new java.io.FileInputStream(srcFile);
            char c[] = new char[100];
            char c1[]= new char[100];
int len=0;
      

            int ch=-1;// used in reading from file Process
            while((ch=read.read())!=-1) {

                befor+=(char)ch;
            }
            read.close();
            read=null;

            for(int i1=0;i1<befor.length();i1++) {

                ch=(int)befor.charAt(i1);
                 if(ch>='a' && ch<='z' ){
                c[len] =(char) ch;
                len++;
            }

                int size = befor.length();
                 for( int i = 0; i < size; i++){
             c1[i] =  c[i];
        }
        int r1 = 0, l1 = 0, r2 = 0, l2 = 0;
        for(int n = 0; n < size/2; n++){
            for(int i = 0; i < 5; i++){
                for(int j = 0; j < 5; j++){
                    if(c[2*n] == key[i][j]){
                        r1 = i;
                        l1 = j;
                    }
                    if(c[2*n + 1] == key[i][j]){
                        r2 = i;
                        l2 = j;
                    }
                }
            }
           
            if(r1 == r2){
                if(l1 == 0 ){ l1 = 5;}
                c1[2*n] = key[r1][(l1 - 1)%5];
                if(l2 == 0 ){ l2 = 5;}
                c1[2*n  + 1] = key[r2][(l2 - 1)%5];
            }
            else if(l1 == l2){
                if(r1 == 0){ r1 = 5;}
                c1[2*n] = key[(r1 - 1)%5][l1];
                if(r2 == 0){ r2 = 5;}
                c1[2*n + 1] = key[(r2 - 1)%5][l2];
            }
            else{
            c1[2*n] = key[r1][l2];
            c1[2*n + 1] = key[r2][l1];
            }
        }

        char c2[]= new char[size];
        for(int j = 0; j < size; j++ ){
            c2[j] = c1[j];
        }
       
        int n0=0,count0=0;
        for(int i=1;i<c2.length-1;i++){
           if(c2[i]=='x'){
               if(c2[i-1]==c2[i+1])
               count0++;
           }}
       if(c2[c2.length-1]=='x')
           count0++;
        char[]c3=new char[c2.length-count0];
c3[n0++]=c2[0];
       for(int i=1;i<c2.length-1;i++){
           if(c2[i]!='x')
               c3[n0++]=c2[i];
           else
            if(c2[i-1]!=c2[i+1]){
           c3[n0++]=c2[i];


           }
       }
       if(c2[c2.length-1]!='x')
           c3[n0++]=c2[c2.length-1];

        
after=new String(c3);

            
            }

            write=new java.io.FileOutputStream(desFile);
            for(int i=0;i<after.length();i++) {
                write.write(after.charAt(i));
            }
            write.close();
            write=null;
        } catch(java.io.IOException e) {
            javax.swing.JOptionPane.showMessageDialog(this,e,"Bad Selection File",javax.swing.JOptionPane.ERROR_MESSAGE);
            javax.swing.JOptionPane.showMessageDialog(this,"Process completed UnSuccessfully","Process message",javax.swing.JOptionPane.INFORMATION_MESSAGE);
            return;
        }
        javax.swing.JOptionPane.showMessageDialog(this,"Process completed Successfully","Process message",javax.swing.JOptionPane.INFORMATION_MESSAGE);
    }//GEN-LAST:event_DecodeActionPerformed

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new playfair1().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton Decode;
    private javax.swing.JButton Encode;
    private javax.swing.JButton desBrowse;
    private javax.swing.JTextField desPath;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JButton srcBrowse;
    private javax.swing.JTextField srcPath;
    private javax.swing.JTextField txtKey;
    // End of variables declaration//GEN-END:variables

}