package test;



import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 *
 * @author tom
 *
 */
public class CrackMyEclipse6 {

	/**
	 *
	 *	获取用户输入
	 *
	 */
	private static String inputString() {
		BufferedReader bufferedreader = new BufferedReader(
				new InputStreamReader(System.in));
		String s = null;
		try {
			s = bufferedreader.readLine();
		} catch (IOException ioexception) {
			ioexception.printStackTrace();
		}
		return s;
	}


	static String License_Name = " License Name  :";
	static String License_Key =  " License Key   :";
	static String MyEclipse_Version_6_0 = "6.0";

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		String username = "abc";

		System.out.println(" /////////////////////////////////////////");
		System.out.println(" //                                     //");
		System.out.println(" // My Eclipse IDE v0.10 Keygen For 6.0 //");
		System.out.println(" // Version: 0.10                       //");
		System.out.println(" // Author tom                          //");
		System.out.println(" // Tools: Eclipse3.3                   //");
		System.out.println(" //                                     //");
		System.out.println(" /////////////////////////////////////////");

		while( true ){

			System.out.print(License_Name);
			username = inputString();
			if(username==null || username.trim().equals("")){
			    System.out.println("\"" + License_Name.substring(0,License_Name.length()-1).trim()  + "\" "+ "is Empty. Please input again(input 'exit' Program is End.).");
			}else{
			       if(username.trim().equalsIgnoreCase("exit")){
			         System.out.println(" Exit... ... ");
			         System.exit( 0 );
			       }else
			         break;
			}
		}

		/**
		 * FIXME
		 * Ver0.5中将加入对6.0以下版本的支持
		 */
		License_Key += getLicenseKey( MyEclipse_Version_6_0,username );
		System.out.println( License_Key );

	}


	/**
	 * 将字符转换成[0~9][a~z][A~Z]的ASCII码
	 * @param s
	 * @return
	 */
    private static String convert(String s)
    {
        if(s == null || s.length() == 0)
            return s;
        byte abyte0[] = s.getBytes();
        char ac[] = new char[s.length()];
        int i = 0;
        for(int k = abyte0.length; i < k; i++){
            int j = abyte0[i];
            if(j >= 48 && j <= 57)
                j = ((j - 48) + 5) % 10 + 48;
            else
            if(j >= 65 && j <= 90)
                j = ((j - 65) + 13) % 26 + 65;
            else
            if(j >= 97 && j <= 122)
                j = ((j - 97) + 13) % 26 + 97;
            ac[i] = (char)j;
        }
        return String.valueOf(ac);
    }

    /**
     * 计算字符串散列值
     * @param s
     * @return
     */
    private static int CalculateHash(String s)
    {
        int i = 0;
        char ac[] = s.toCharArray();
        int j = 0;
        for(int k = ac.length; j < k; j++)
            i = 31 * i + ac[j];
        return Math.abs(i);
    }

    private static String getLicenseKey( String MyeclipseVersion,String username )
    {
    	String key = "";
		String strCode = "";
		if( MyeclipseVersion.equals( MyEclipse_Version_6_0 )){
			strCode = username.substring(0,1);
			strCode += "Y";  // "T"为试用版   "Y"为专业版
			strCode += "E3MP"; // E3MP针对Eclipse3   E2MY 针对Eclipse2
			strCode += "10" ; //>3
			strCode += "12-456"; //填写任意数字，但第三个字符位应该为"-"
			strCode += "121231 "; //有效期《20090903》 随意填<例如：990903>    格式<XX年XX月XX日>最后一定加一个空格
			int j = CalculateHash((new StringBuilder(String.valueOf(strCode))).append("Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.").append(username).toString());
			strCode = strCode + Integer.toString( j );
			key = convert( strCode );
		}
		return key;
    }
}

//flowbyte.cn
//sLR8ZC-855575-66525457680638618