保存为：KeyGen.java
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import java.math.BigInteger; import java.util.Date; import java.util.Random; import java.util.Scanner; import java.util.zip.CRC32; public class KeyGen { 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(); } 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(); } 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(); } 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] = 14; // 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){ System.out.println("请输入用户名:"); Scanner scanner = new Scanner(System.in); String username = scanner.next(); Random r = new Random(); System.out.println(MakeKey(username, 0, r.nextInt(100000))); } } |
然后：
javac KeyGen.java
java -classpath . KeyGen
输入用户名后，回车可生成注册码