Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.security.MessageDigest;

public class Main {
    public static String sha1(String text) {
        MessageDigest md;
        try {
            md = MessageDigest.getInstance("SHA-1");
            byte[] sha1hash = new byte[40];
            md.update(text.getBytes("UTF-8"), 0, text.length());
            sha1hash = md.digest();
            return convertToHex(sha1hash);
        } catch (Exception e) {
        }

        return "";
    }

    private static String convertToHex(byte[] data) {
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < data.length; i++) {
            int halfbyte = (data[i] >>> 4) & 0x0F;
            int two_halfs = 0;
            do {
                if ((0 <= halfbyte) && (halfbyte <= 9))
                    buf.append((char) ('0' + halfbyte));
                else
                    buf.append((char) ('a' + (halfbyte - 10)));
                halfbyte = data[i] & 0x0F;
            } while (two_halfs++ < 1);
        }
        return buf.toString();
    }
}