That should not be your problem:
http://code.google.com/appengine/docs/java/jrewhitelist.html

I am using MD5 in AppEngine without issues.

On Jun 10, 3:17 pm, Michael <mrher...@gmail.com> wrote:
> Hi,
>
> I am pretty new to app engine (and Java) and I am seem to have run in
> to a wall.  I want to do an MD5 hash and I was trying to use the
> java.security package, but I get:
>  [ERROR] Line 3: The import java.security cannot be resolved
>
> I am thinking that it is because app engine can't use java.security?
>
> Here is the MD5 code I have
>
> import java.security.MessageDigest;
> import java.security.NoSuchAlgorithmException;
> ...
> try {
> MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
> digest.update("test".getBytes());
> PW = digest.digest().toString();
>
> } catch (NoSuchAlgorithmException e) {
> }
>
> Am I doing something wrong, or is there a different way to get a MD5
> hash?  I also need to do the same thing client side using GWT if their
> is any advice for that too.
>
> Thanks
> Michael

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