Samir :
Below is my code. when I try to print sealed object it only displays
"javax.crypto.SealedObject@34dac684"
private void encryptUserCodes(List<UserCode> userCodes) {
try {
// generate a secret key using the DES algorithm
key = KeyGenerator.getInstance("DES").generateKey();
ecipher = Cipher.getInstance("DES");
dcipher = Cipher.getInstance("DES");
// initialize the ciphers with the given key
ecipher.init(Cipher.ENCRYPT_MODE, key);
dcipher.init(Cipher.DECRYPT_MODE, key);
// create a sealed object
SealedObject sealed = new SealedObject((Serializable) userCodes, ecipher);
//PRINT SEALED OBJECT HERE
}
catch(Exception e){
e.printStackTrace();
}
}
zerocewl :
1. Encrypt:
Create Outputstreams and use Base64 Encoder to get the String.
2. Decrypt:
Create a new Cipher, Inputstreams and use Base 64 Decoder to get back your original String.
Fully working example (just copy and paste):
import javax.crypto.SecretKey;
import javax.crypto.KeyGenerator;
import javax.crypto.Cipher;
import javax.crypto.SealedObject;
import java.io.Serializable;
import java.io.ByteArrayOutputStream;
import javax.crypto.CipherOutputStream;
import java.io.ObjectOutputStream;
import java.io.ByteArrayInputStream;
import javax.crypto.CipherInputStream;
import java.io.ObjectInputStream;
import java.util.Base64;
public class MyClass {
public static void main(String args[]) {
OtherClass myObject = new OtherClass();
myObject.print();
}
}
// you can add other public classes to this editor in any order
class OtherClass
{
public void print() {
try {
String userCodes = "Test123";
// generate a secret key using the DES algorithm
SecretKey key = KeyGenerator.getInstance("DES").generateKey();
Cipher ecipher = Cipher.getInstance("DES");
// initialize the ciphers with the given key
ecipher.init(Cipher.ENCRYPT_MODE, key);
// create a sealed object
SealedObject sealed = new SealedObject((Serializable) userCodes, ecipher);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
CipherOutputStream cipherOutputStream = new CipherOutputStream(
outputStream, ecipher);
ObjectOutputStream oos = new ObjectOutputStream(cipherOutputStream);
oos.writeObject( sealed );
cipherOutputStream.close();
byte[] values = outputStream.toByteArray();
String base64encoded = Base64.getEncoder().encodeToString(values);
System.out.println(base64encoded);
// decrypt
Cipher fcipher = Cipher.getInstance("DES");
fcipher.init(Cipher.DECRYPT_MODE, key);
ByteArrayInputStream istream = new ByteArrayInputStream(Base64.getDecoder().decode(base64encoded));
CipherInputStream cipherInputStream = new CipherInputStream(istream, fcipher);
ObjectInputStream inputStream = new ObjectInputStream(cipherInputStream);
SealedObject sealdedObject = (SealedObject) inputStream.readObject();
System.out.println(sealdedObject.getObject(key));
}
catch(Exception e){
e.printStackTrace();
}
}
}