Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    static final byte[] HEX_CHAR_TABLE = { (byte) '0', (byte) '1', (byte) '2', (byte) '3', (byte) '4', (byte) '5',
            (byte) '6', (byte) '7', (byte) '8', (byte) '9', (byte) 'a', (byte) 'b', (byte) 'c', (byte) 'd',
            (byte) 'e', (byte) 'f' };

    public static String makeSHA1Hash(String text) {
        try {
            return makeSHA1Hash(text.getBytes("utf-8"));
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

    public static String makeSHA1Hash(byte[] bytes) {
        try {
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            md.update(bytes, 0, bytes.length);
            byte[] sha1hash = md.digest();
            return convertToHex(sha1hash);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

    private static String convertToHex(byte[] raw) throws UnsupportedEncodingException {
        StringBuilder sb = new StringBuilder(raw.length);
        for (byte b : raw) {
            int v = b & 0xFF;
            sb.append((char) HEX_CHAR_TABLE[v >>> 4]);
            sb.append((char) HEX_CHAR_TABLE[v & 0xF]);
        }
        return sb.toString();
    }
}