Problem using java crypto class... Please help me

Question

Hi, i'm trying to do application that send information via socket, and i have to send the data encrypted,
i`m trying to implemented the RC4 algorithm.... I read an article that said that the java sdk 1.4 has already
implemented the securities classes. So I made this little program:
import javax.crypto.spec.*;
import javax.crypto.*;
import java.security.*;
import java.io.*;
public class MicroRC4
public void encriptaClavePublica(String trama)
Cipher rc4Cipher;
byte[] rc4KeyByte;
SecretKey rc4Key;
String keyStr;
String messageEncryp;
byte[] messageEncrypByte;
rc4Key = null;
messageEncryp = trama;
// Clave para encriptar el mensaje
keyStr = new String();
keyStr = "12345678";
rc4KeyByte = new byte[8];
messageEncrypByte = new byte[255];
for(int i=0; i < 8; i++)
rc4KeyByte[i] = (byte)keyStr.charAt(i);
try
for(int i=0; i < messageEncryp.length(); i++)
messageEncrypByte[i] = (byte)messageEncryp.charAt(i);
rc4Key = (SecretKey)new SecretKeySpec(rc4KeyByte, "RC4");
rc4Cipher = Cipher.getInstance("RC4");
rc4Cipher.init(Cipher.ENCRYPT_MODE, rc4Key);
byte[] result = null;
result = rc4Cipher.doFinal(messageEncrypByte);
System.out.println("Usage:"+result);
catch(Exception e)
System.out.println(" Error: " + e.getMessage());
System.out.println("\n........................................\n");
I don't know what is wrong but when i run the application it show me the following message :
Error: Algorithm RC4 not available
Does anybody know what is wrong ??
Does anybody can help me ??
or tell me when can i find some source code that implement de RC4 algorithm
Thank's in advance..
Alejandro.

Answer 1

Hi Alejandro,
In the ends i decided to implement the algorithm by
myself, i did it... any way thank's again.... If
anybody want to see the code, send me a mail......
AlejandroCan I also get the source code? my email id is [email protected]
Thanks a lot!
Srik.