Sha1 to base64 key format needed

Question

Hello All,
I am new to Java and trying to get my arms around the various places to find new classes for various functions.
I am trying to find a class that will convert a seed string using SHA1 into a base64 string. I have done some heavy trolling through many google pointers but I have not found exactly what I am looking for.
In perl I would use something like the following two lines:
use Digest::SHA1 qw(sha1_base64);
$base64digeststring = sha1_base64("foobar");
Does anybody have any stubs of code for this?
Thanks,
Mark

Answer 1

I java it is two seperate steps. The first is to SHA-1 digest the input and then to base64 encode the resulting digest.
MessageDigest md = MessageDigest.getInstance("SHA1");
byte[] digest = md.digest(input.getBytes("ASCII"));
String enc = Base64.encode(digest);
The above example assumes you have a Base64.class which you probably don't. MessageDigest on the other hand is included in the base jdk and jre so that line should work fine for you out of the box. So in short what you really need to find is a Base64 encoder/decoder class(es).
There is one that is packaged with Sun's JDK in the sun.misc package. Problem with using that is that it only exists on Sun's JVMs (aka IBM jvm would result in your app failing). However, if you search for Base64 and Java you should find numerous open source impls you can use..
Enjoy..