How to convert a "binary string" to base64?

Question

I've followed this: https://dev.twitter.com/docs/auth/creating-signature

to the end but I can't find how to encode a "binary string" to base64(at the end). I wanted to try online converters first but they don't give the string the show "tnnArxj06cWHq44gCs1OSKk/jLY="

Tried this: http://www.motobit.com/util/base64-decoder-encoder.asp

and

http://www.hash-cracker.com/base64.php#anchor

and

http://www.opinionatedgeek.com/dotnet/tools/Base64Encode/

and none give that string.

I'm going to be using java. But I think all those java tools I search for will give the same result as the online converters. What has to be done to encode a "binary string" to base64?

Solution

The problem of using those online tools isn't going to be in the base64 conversion - it's going to be parsing the hex string into a byte array to start with. In your real code that won't be a problem, as it'll be the output of another stage. Just to prove that, here's some sample Java code, using a public domain base64 encoder:

public class Test {
    public static void main(String[] args) throws Exception {
        byte[] data = { (byte) 0xB6, (byte) 0x79, (byte) 0xC0, (byte) 0xAF, 
                (byte) 0x18, (byte) 0xF4, (byte) 0xE9, (byte) 0xC5, 
                (byte) 0x87, (byte) 0xAB, (byte) 0x8E, (byte) 0x20, 
                (byte) 0x0A, (byte) 0xCD, (byte) 0x4E, (byte) 0x48, 
                (byte) 0xA9, (byte) 0x3F, (byte) 0x8C, (byte) 0xB6 };

        String text = Base64.encodeBytes(data);
        System.out.println(text);
    }
}

Output: tnnArxj06cWHq44gCs1OSKk/jLY=

Comments

[Dave]

Okay. I get it. Thanks. So here: ostermiller.org/calc/encode.html I go from "b679c0af18f4e9c587ab8e200acd4e48a93f8cb6" to decode hex. Then Encode base64 and it came out right "tnnArxj06cWHq44gCs1OSKk/jLY=". One thing I wasn't seeing was the hex thing.

[Yunnosch]

I do not see how this answers the question at the top of this page, but it should. Please edit according to How to Answer or delete the answer. Otherwise it risks being flagged as "not an answer" and being deleted.