Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.io.*;

import java.nio.ByteBuffer;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    public static byte[] createAuthenticationDigest(String passcode, long t1, double q1)
            throws IOException, NoSuchAlgorithmException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream(512);
        DataOutputStream out = new DataOutputStream(baos);
        byte[] digest = createDigest(passcode, t1, q1);
        out.writeLong(t1);
        out.writeDouble(q1);
        out.writeInt(digest.length);
        out.write(digest);
        out.flush();
        return baos.toByteArray();
    }

    public static byte[] createDigest(String passcode, long t1, double q1)
            throws IOException, NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance("SHA");
        md.update(passcode.getBytes());
        ByteBuffer bb = ByteBuffer.allocate(16); //8 bytes for long and double each
        bb.putLong(t1);
        bb.putDouble(q1);
        md.update(bb);
        return md.digest();
    }
}