Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();

    private static String sha1Hash(String toHash) {
        String hash = null;
        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-1");
            byte[] bytes = toHash.getBytes("UTF-8");
            digest.update(bytes, 0, bytes.length);
            bytes = digest.digest();

            // This is ~55x faster than looping and String.formating()
            hash = bytesToHex(bytes);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return hash;
    }

    public static String bytesToHex(byte[] bytes) {
        char[] hexChars = new char[bytes.length * 2];
        for (int j = 0; j < bytes.length; j++) {
            int v = bytes[j] & 0xFF;
            hexChars[j * 2] = hexArray[v >>> 4];
            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
        }
        return new String(hexChars);
    }
}