Encrypt a hex string in java.
- by twintwins
I would like to ask for any suggestions about my problem. I need to encrypt a hexadecimal string. I must not to use the built-in functions of java because it doesn't work in my server. In short, I have to hard code an algorithm or any means of encrypting the message. Anyone who could help me with this? thanks a lot!
here is the code.
public Encrypt(SecretKey key, String algorithm) {
try {
ecipher = Cipher.getInstance(algorithm);
dcipher = Cipher.getInstance(algorithm);
ecipher.init(Cipher.ENCRYPT_MODE, key);
dcipher.init(Cipher.DECRYPT_MODE, key);
} catch (NoSuchPaddingException e) {
System.out.println("EXCEPTION: NoSuchPaddingException");
} catch (NoSuchAlgorithmException e) {
System.out.println("EXCEPTION: NoSuchAlgorithmException");
} catch (InvalidKeyException e) {
System.out.println("EXCEPTION: InvalidKeyException");
}
}
public void useSecretKey(String secretString) {
try {
SecretKey desKey = KeyGenerator.getInstance("DES").generateKey();
SecretKey blowfishKey = KeyGenerator.getInstance("Blowfish").generateKey();
SecretKey desedeKey = KeyGenerator.getInstance("DESede").generateKey();
Encrypt desEncrypter = new Encrypt(desKey, desKey.getAlgorithm());
Encrypt blowfishEncrypter = new Encrypt(blowfishKey, blowfishKey.getAlgorithm());
Encrypt desedeEncrypter = new Encrypt(desedeKey, desedeKey.getAlgorithm());
desEncrypted = desEncrypter.encrypt(secretString);
blowfishEncrypted = blowfishEncrypter.encrypt(secretString);
desedeEncrypted = desedeEncrypter.encrypt(secretString);
} catch (NoSuchAlgorithmException e) {}
}
those are the methods i used. no problem if it is run as an application but then when i put it to my server which is the glassfish server an exception occured and it says no such algorithm.
