找了一个 Intellij Idea 13 的注册机

package com.doscala;

import java.math.BigInteger;
import java.util.Date;
import java.util.Random;
import java.util.zip.CRC32;

public class keygen
{
    /**
     * @param s
     * @param i
     * @param bytes
     * @return
     */
    public static short getCRC(String s, int i, byte bytes[])
    {
        CRC32 crc32 = new CRC32();
        if (s != null)
        {
            for (int j = 0; j < s.length(); j++)             {                 char c = s.charAt(j);                 crc32.update(c);             }         }         crc32.update(i);         crc32.update(i >> 8);
        crc32.update(i >> 16);
        crc32.update(i >> 24);
        for (int k = 0; k < bytes.length - 2; k++)         {             byte byte0 = bytes[k];             crc32.update(byte0);         }         return (short) (int) crc32.getValue();     }     /**      * @param biginteger      * @return String      */     public static String encodeGroups(BigInteger biginteger)     {         BigInteger beginner1 = BigInteger.valueOf(0x39aa400L);         StringBuilder sb = new StringBuilder();         for (int i = 0; biginteger.compareTo(BigInteger.ZERO) != 0; i++)         {             int j = biginteger.mod(beginner1).intValue();             String s1 = encodeGroup(j);             if (i > 0)
            {
                sb.append("-");
            }
            sb.append(s1);
            biginteger = biginteger.divide(beginner1);
        }
        return sb.toString();
    }

    /**
     * @param i
     * @return
     */
    public static String encodeGroup(int i)
    {
        StringBuilder sb = new StringBuilder();
        for (int j = 0; j < 5; j++)
        {
            int k = i % 36;
            char c;
            if (k < 10)             {                 c = (char) (48 + k);             }             else             {                 c = (char) ((65 + k) - 10);             }             sb.append(c);             i /= 36;         }         return sb.toString();     }     /**      * @param name      * @param days      * @param id      * @return      */     public static String MakeKey(String name, int days, int id)     {         id %= 100000;         byte bkey[] = new byte[12];         bkey[0] = (byte) 1; // Product type: IntelliJ IDEA is 1         bkey[1] = 13; // version         Date d = new Date();         long ld = (d.getTime() >> 16);
        bkey[2] = (byte) (ld & 255);
        bkey[3] = (byte) ((ld >> 8) & 255);
        bkey[4] = (byte) ((ld >> 16) & 255);
        bkey[5] = (byte) ((ld >> 24) & 255);
        days &= 0xffff;
        bkey[6] = (byte) (days & 255);
        bkey[7] = (byte) ((days >> 8) & 255);
        bkey[8] = 105;
        bkey[9] = -59;
        bkey[10] = 0;
        bkey[11] = 0;
        int w = getCRC(name, id % 100000, bkey);
        bkey[10] = (byte) (w & 255);
        bkey[11] = (byte) ((w >> 8) & 255);
        BigInteger pow = new BigInteger("89126272330128007543578052027888001981", 10);
        BigInteger mod = new BigInteger("86f71688cdd2612ca117d1f54bdae029", 16);
        BigInteger k0 = new BigInteger(bkey);
        BigInteger k1 = k0.modPow(pow, mod);
        String s0 = Integer.toString(id);
        String sz = "0";
        while (s0.length() != 5)
        {
            s0 = sz.concat(s0);
        }
        s0 = s0.concat("-");
        String s1 = encodeGroups(k1);
        s0 = s0.concat(s1);
        return s0;
    }

    public static void main(String[] args)
    {
        if (args.length == 0)
        {
            System.err.printf("*** Usage: %s name%n", keygen.class.getCanonicalName());
            System.exit(1);
        }
        Random r = new Random();
        System.out.println(MakeKey(args[0], 0, r.nextInt(100000)));
    }
}

找了一个 Intellij Idea 13 的注册机》上有2条评论

  1. Cassandra

    69% qui répondent non, je trouve tout de même que les Français sont lucides. Question de lecture. L&1ve#7;in82rse eut été sujet à réaction mais là…Je ne pense pas qu’on puisse dire qu’un Français n’a aucune chance de gagner.Peu de chances, mais aucune, non.

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