Password based encryption using AES in java 5 (JCE only)

Question

I would like to use AES (192 or 256 bits), but am stuck on how to generate a key from a user supplied password.

I have gone through this thread, and am able to run the program in Java 6. However, I need to run the same program in Java 5, and SecretKeyFactory for PBKDF2WithHmacSHA1 is not available in JDK 5.

So, essentially, I need to generate 192 or 256 bits for a SecretKey based on users password, and I would like a secure way to do that in java 5.

Help appreciated!

EDIT #1 Just to avoid getting stuck, I am now using 128 bits from MD5(user-entered-password + fixed-salt) as the key to AES. I know it sucks, and will change it the moment I figure out a good way to generate the key.

Answer 1

Is there a reason you want PBKDF2WithHmacSHA1?

SecretKeyFactory existed in 1.4.2, so you might look here.