md5 algorithm

[kumar mdu]

Hi friends,

how to implement MD5 encrytion algorithm in Java ME?

thanks
kumar

[Walter Gabrielsen Iii]

Well, there are code examples of the Algorithm on Wikipedia : MD5 -- it looks like you would need to know Java bitwise to do it by hand.

There is also Fast MD5 Implementation in Java >> J2ME MIDP/CLDC Versions (Preliminary), but I have no idea if it works or not.

You might also try a search of the internet using terms: md5 (j2me OR "java me") -- the term "j2me" was the early name for "Java ME."

[kumar mdu]

I'm using this code for MD5 algorithm for encryption

String cipher = "";
        byte[] ab = null;

        try {
            MessageDigest md = MessageDigest.getInstance(MessageDigest.ALG_SHA, true);

            md.update(input.getBytes(), 0, input.length());

            System.out.println("in genHash method");
            System.out.println("\t" + input);
            System.out.println("\t" + md);

            short sh = md.doFinal(input.getBytes(), 0, input.length(), ab, 0);

            System.out.println("\tsh = " + sh);

        } catch (CryptoException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        cipher = bytesToHex(ab);

Showing error is as

C:\Documents and Settings\kumar\My Documents\NetBeansProjects\J2ME-MD5\source\src\md5\mdsMidlet.java:7: package com.sun.midp.ssl does not exist
import com.sun.midp.ssl.CryptoException;
C:\Documents and Settings\kumar\My Documents\NetBeansProjects\J2ME-MD5\source\src\md5\mdsMidlet.java:8: package com.sun.midp.ssl does not exist
import com.sun.midp.ssl.MessageDigest;

how can i solve this..?

kumar

[Walter Gabrielsen Iii]

Either the package "com.sun.midp.*" is part of an optional package (JSRs) or, if you downloaded an Md5 api from the internet, then I think, you need to register the package with your Netbeans application, but not just use import through code but actually include the library so that it's bundled with your application.