// Client.java
import java.io.*;
import javax.crypto.*;
import java.security.*;
import java.util.*;
import javax.crypto.spec.*;
import java.net.*;
class client
{
public static void main(String[] arr) throws Exception
{
int i;
Key k;
Cipher c;
KeyGenerator kg;
FileOutputStream fos;
CipherInputStream cis;
Scanner input = new Scanner(System.in);
Socket cs = new Socket("localhost",1987);
ObjectOutputStream oos = new ObjectOutputStream(cs.getOutputStream());
c = Cipher.getInstance("DES");
kg = KeyGenerator.getInstance("DES");
k = kg.generateKey();
c.init(Cipher.ENCRYPT_MODE,k);
cis = new CipherInputStream(new FileInputStream(new File("my.jpg")),c);
int j=0;
oos.writeObject(k);
while((i=cis.read())!=-1)
{
oos.writeInt(i);
oos.flush();
}
cs.close();
}
}
// server.java
import java.io.*;
import javax.crypto.*;
import java.security.*;
import java.util.*;
import javax.crypto.spec.*;
import java.net.*;
class myserver implements Runnable
{
Socket cs;
Thread t;
Cipher c;
KeyGenerator kg;
myserver(Socket cs)
{
this.cs=cs;
try
{
}catch(Exception e)
{
}
t = new Thread(this);
t.start();
}
public void run()
{
try
{
c = Cipher.getInstance("DES");
ObjectInputStream ois = new ObjectInputStream(cs.getInputStream());
FileOutputStream fos = new FileOutputStream("myenc.jpg");
Key k = (Key) ois.readObject();
c.init(Cipher.DECRYPT_MODE,k);
int i;
while((i=ois.readInt())!=-1)
{
fos.write(i);
}
}
catch(Exception e)
{
}
try
{
CipherInputStream cis = new CipherInputStream(new FileInputStream(new File("myenc.jpg")),c);
FileOutputStream fos1 = new FileOutputStream("again.jpg");
int j;
while((j=cis.read())!=-1)
fos1.write(j);
fos1.close();
}
catch(Exception e)
{
}
}
}
class server
{
public static void main(String[] arr) throws Exception
{
Socket cs;
ServerSocket ss = new ServerSocket(1987);
while(true)
{
cs = ss.accept();
new myserver(cs);
}
}
}
import java.io.*;
import javax.crypto.*;
import java.security.*;
import java.util.*;
import javax.crypto.spec.*;
import java.net.*;
class client
{
public static void main(String[] arr) throws Exception
{
int i;
Key k;
Cipher c;
KeyGenerator kg;
FileOutputStream fos;
CipherInputStream cis;
Scanner input = new Scanner(System.in);
Socket cs = new Socket("localhost",1987);
ObjectOutputStream oos = new ObjectOutputStream(cs.getOutputStream());
c = Cipher.getInstance("DES");
kg = KeyGenerator.getInstance("DES");
k = kg.generateKey();
c.init(Cipher.ENCRYPT_MODE,k);
cis = new CipherInputStream(new FileInputStream(new File("my.jpg")),c);
int j=0;
oos.writeObject(k);
while((i=cis.read())!=-1)
{
oos.writeInt(i);
oos.flush();
}
cs.close();
}
}
// server.java
import java.io.*;
import javax.crypto.*;
import java.security.*;
import java.util.*;
import javax.crypto.spec.*;
import java.net.*;
class myserver implements Runnable
{
Socket cs;
Thread t;
Cipher c;
KeyGenerator kg;
myserver(Socket cs)
{
this.cs=cs;
try
{
}catch(Exception e)
{
}
t = new Thread(this);
t.start();
}
public void run()
{
try
{
c = Cipher.getInstance("DES");
ObjectInputStream ois = new ObjectInputStream(cs.getInputStream());
FileOutputStream fos = new FileOutputStream("myenc.jpg");
Key k = (Key) ois.readObject();
c.init(Cipher.DECRYPT_MODE,k);
int i;
while((i=ois.readInt())!=-1)
{
fos.write(i);
}
}
catch(Exception e)
{
}
try
{
CipherInputStream cis = new CipherInputStream(new FileInputStream(new File("myenc.jpg")),c);
FileOutputStream fos1 = new FileOutputStream("again.jpg");
int j;
while((j=cis.read())!=-1)
fos1.write(j);
fos1.close();
}
catch(Exception e)
{
}
}
}
class server
{
public static void main(String[] arr) throws Exception
{
Socket cs;
ServerSocket ss = new ServerSocket(1987);
while(true)
{
cs = ss.accept();
new myserver(cs);
}
}
}
how to execute tis program???
ReplyDeleteusing command Prompt
ReplyDelete--------------------
start java server
start java client
you can find one encrypted file at sibling location of original image file.
give me the java source code for hiding message using hiding key in an image , pls reply soon i need it immediately
ReplyDeleteHi can you just describe the code. What code does in each special line? Because I want convert this Decryption part to android.
ReplyDeleteThank you