Base64Encode ==

Question

Hello.
Just a quick question on Base64Encoding and MD5.
I'm hashing passwords, then encoding to stuff into DB. All of my encoded data ends in '=='
example:
LN2vQZp6JLpt+b3xFInn2A==
Can anyone tell me why they all end in '==' ?
Thanks in advance.
Vic.

Answer 1

I have a question I am currently using MD5 to hash passwords and Base64Encoder to encode the string before inserting it in the database. I have a probelm though, I used UTF-8 to make the password platform independent for both Java on Windows and Java on Unix. However, it is not working...when the user creates a user on the Unix platform and tries to log in with that userid/password which was hashed/encoded on Unix platform, in a Windows platform, the password is different from what was stored on the Unix platform and what is passed in from the user hashed and encoded on the Windows platform. Do you have a solution for this. Here is my code below. Please HELP! Thanks so much!
public String doIt(String test) {
try {
sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();
secret = new String(encrypt(test));
//System.out.println("the encrypted result : " + secret);
encoded=encoder.encode(secret.getBytes());
System.out.print("Here is the encoded string in LIMDBO" + encoded);
boolean ok = true;
//String s = "";
} catch (Exception e) {
e.printStackTrace();
return encoded;
static byte[] encrypt(String x) throws Exception {
java.security.MessageDigest d = null; //comment
d = java.security.MessageDigest.getInstance("MD5"); //comment when released
// d = java.security.MessageDigest.getInstance("SHA"); uncomment when released
d.reset();
d.update(x.getBytes("UTF-8"));
return d.digest();
}