/*
 * Copyleft (c) 2014, 2025
 * -----------------------------------------------------------------------
 * Author   : quard@pediy
 *          : wangshy@pediy
 * Maintain : scz <cloudsky@gmail.com>
 *          : https://scz.617.cn/misc/201507251700.txt
 * Version  : 1.5.201408040(full)
 * Compile  : javac -g keygen.java
 * Run      : java keygen
 *          :
 * Create   : 2014-04-23 17:01
 * Modify   : 2015-07-28 17:25
 * -----------------------------------------------------------------------
 * The only thing they can't take from us are our minds. !H
 */
import java.io.*;
import java.lang.Runtime;
import java.util.Scanner;
import java.nio.*;
import java.security.*;
import java.math.*;

class keygen
{
    private static String License_GetSerialNumber ()
    {
        String          str1                = null;
        Runtime         localRuntime        = Runtime.getRuntime();
        Process         localProcess;

        try
        {
            String[]    localObject1    = { "wmic", "bios", "get", "serialnumber" };

            localProcess    = localRuntime.exec( localObject1 );
        }
        catch ( IOException localIOException1 )
        {
            return( null );
        }

        OutputStream    localOutputStream   = localProcess.getOutputStream();
        InputStream     localInputStream    = localProcess.getInputStream();

        try
        {
            localOutputStream.close();
        }
        catch ( IOException localIOException2 )
        {
            return( null );
        }

        Scanner         localObject1        = new Scanner( localInputStream );

        try
        {
            String  str2    = "SerialNumber";

            while ( localObject1.hasNext() )
            {
                String  str3    = localObject1.next();

                if ( str2.equals( str3 ) )
                {
                    str1    = localObject1.next().trim();
                    break;
                }
            }  /* end of while */
            localObject1.close();
        }
        finally
        {
            localObject1.close();
        }
        return( str1 );
    }  /* end of License_GetSerialNumber */

    private static int License_sum ( int paramInt )
    {
        int i   = 0;

        while ( paramInt > 0 )
        {
            i          += ( paramInt & 0xF );
            paramInt  >>= 4;
        }  /* end of while */
        return( i % 10 );
    }  /* end of License_sum */

    private static long License_GetMachineId ( String SerialNumber )
    {
        try
        {
            MessageDigest   localMessageDigest  = MessageDigest.getInstance( "MD5" );

            localMessageDigest.update( SerialNumber.getBytes() );

            byte[]          arrayOfByte         = localMessageDigest.digest();
            ByteBuffer      localByteBuffer     = ByteBuffer.wrap( arrayOfByte );

            localByteBuffer.order( ByteOrder.LITTLE_ENDIAN );
            return( localByteBuffer.getLong() & 0xFFFFFFFF );
        }
        catch ( NoSuchAlgorithmException localNoSuchAlgorithmException )
        {
            throw new RuntimeException( localNoSuchAlgorithmException );
        }
    }  /* end of License_GetMachineId */

    private static long License_GetMachineId_2 ( long MachineId )
    {
        int         i   = ( int )( MachineId & 0xFFFFFFFF );
        int         j   = ( int )( MachineId >> 32 & 0xFFFFFFFF );
        int         n   = i + 376273029 + 287454020 & 0xFFFFFFFF;
        int         i1  = j - 52416167 + 1432778632 & 0x7FFFFFFF;
        ByteBuffer  buf = ByteBuffer.allocateDirect( 8 );

        buf.putInt( i1 );
        buf.putInt( n );
        buf.rewind();
        return( buf.getLong() );
    }  /* end of License_GetMachineId_2 */

    private static String License_GenerateKey ( long MachineId, long time )
    {
        long    l = License_GetMachineId_2( MachineId );
        int     t = ( int )time ^ 0x56739ACD;
        return( String.format( "%dZ%d%d", l, t, License_sum( t ) ) );
    }  /* end of License_GenerateKey */

    public static void main ( String[] args )
    {
        String  SerialNumber    = License_GetSerialNumber();
        long    MachineId       = License_GetMachineId( SerialNumber );
        long    time            = System.currentTimeMillis() / 1000L + 86400 * 365 * 100;

        System.out.print
        (
            String.format
            (
                "SerialNumber    : %s\n" +
                "MachineId       : %x\n" +
                "MachineId_2     : %x\n" +
                "License key     : %s\n",
                SerialNumber,
                MachineId,
                License_GetMachineId_2( MachineId ),
                License_GenerateKey( MachineId, time )
            )
        );
        return;
    }  /* end of main */
}  /* end of class keygen */