Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

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

public class Main {
    public static byte[] computeSHA1(byte[] convertme, int offset, int len) {
        try {
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            md.update(convertme, offset, len);
            return md.digest();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return new byte[20];
    }

    public static byte[] computeSHA1(ByteBuffer convertme, int offset, int len) {
        int oldp = convertme.position();
        int oldl = convertme.limit();
        try {
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            convertme.position(offset);
            convertme.limit(len);
            md.update(convertme);
            return md.digest();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            convertme.limit(oldl);
            convertme.position(oldp);
        }
        return new byte[20];
    }

    public static byte[] computeSHA1(ByteBuffer convertme) {
        return computeSHA1(convertme, 0, convertme.limit());
    }

    public static byte[] computeSHA1(byte[] convertme) {
        return computeSHA1(convertme, 0, convertme.length);
    }
}