SRP6 Java Implementation

I was wondering if anyone knew how to implement the SRP6 protocol in Java. I know there's an impl of it in gnu-crypto, but i don't need all the extra stuff. I've been trying various combination's and none of them have worked. I'm comparing my results with the results from http://srp.stanford.edu/demo/demo.html , which i'm assuming are correct, due to the fact that it's written by the creator of the SRP protocol, I mean, I suppose it could be wrong, but then the site wouldn't be very effective then.
My biggest problem seems to be when hashing the salt with the hashed username and password.
SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
BigInteger salt = new BigInteger(random.generateSeed(32));
BigInteger innerHash = new BigInteger(SHA1.hash("zymus:apocalypse"));//According to many tested SHA1 impl's, this works correctly.
byte[] exp = new String(SHA1.hash(salt.toString(16) + innerHash.toString(16))).getBytes("UTF-8");;//This is where i believe I'm messing up. This is just one of the many combination's that i've tried.
System.out.println(salt.toString(16));
System.out.println(new BigInteger(exp).toString(16));Output:
>
8098f80df83b4f23d3f104acac3f6f165ae059ebe00966d1c3339afb37fe78c
20476ec2a3c2a9c2ad2ac3984f010769c3bec3b6e282ac11155fc2a71f
>
Expected output according to aforementioned site:
>
8098f80df83b4f23d3f104acac3f6f165ae059ebe00966d1c3339afb37fe78c
ffd90619e047303e3278be09314664b3557c89d5
>
As you can see, the hashed salt + pass doesn't compare. The protocol definition for hashing is:
x = SHA1(salt + SHA1(username + ":" + password));Any ideas?
Edited by: Zymus on Sep 3, 2010 7:20 AM
Edited by: Zymus on Sep 3, 2010 7:21 AM

check out this site www.sourceforge.net. There are a lot of free , opensource projects available for download. Try and search there. I am sure you'll get one.

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