UUID interop with c# code

Question

Can c# donet generate same UUID for following java code? if so how? i tried GUID but didn\'t work!

Text:

String cleartext = \"CN=CompanyName;mac=some mac         


        

Answer 1

If you want interoperability don't depend on code that's not under your control. It could change with each Java version or implementation.

You could take the way that is used

/**
 * Static factory to retrieve a type 3 (name based) {@code UUID} based on
 * the specified byte array.
 *
 * @param  name
 *         A byte array to be used to construct a {@code UUID}
 *
 * @return  A {@code UUID} generated from the specified array
 */
public static UUID nameUUIDFromBytes(byte[] name) {
    MessageDigest md;
    try {
        md = MessageDigest.getInstance("MD5");
    } catch (NoSuchAlgorithmException nsae) {
        throw new InternalError("MD5 not supported");
    }
    byte[] md5Bytes = md.digest(name);
    md5Bytes[6]  &= 0x0f;  /* clear version        */
    md5Bytes[6]  |= 0x30;  /* set to version 3     */
    md5Bytes[8]  &= 0x3f;  /* clear variant        */
    md5Bytes[8]  |= 0x80;  /* set to IETF variant  */
    return new UUID(md5Bytes);
}

source

and copy it into your code. Create exactly that in other languages as well and your problem should be gone.

In case "type 3 (name based) UUID" is a standard where the result is exactly specified, you could skip copying it in Java since implementation should never return a different result. It's likely that you will find implementations for other languages as well and don't need to port it by hand.