104 lines
5.2 KiB
Java
104 lines
5.2 KiB
Java
package cn.serendipityr.EndMinecraftPlusV2.ACProtocol;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufInputStream;
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import io.netty.buffer.ByteBufOutputStream;
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import io.netty.buffer.Unpooled;
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import org.spacehq.opennbt.NBTIO;
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import org.spacehq.opennbt.tag.builtin.ByteArrayTag;
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import org.spacehq.opennbt.tag.builtin.CompoundTag;
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import org.spacehq.opennbt.tag.builtin.ListTag;
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import javax.crypto.Cipher;
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import java.io.DataInputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.math.BigInteger;
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import java.security.KeyFactory;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.spec.RSAPrivateKeySpec;
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import java.security.spec.RSAPublicKeySpec;
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import java.util.HashSet;
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public class AnotherStarAntiCheat {
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private final RSAPublicKeySpec clientPublicKey;
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private final RSAPrivateKeySpec clientPrivateKey;
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private final RSAPrivateKeySpec serverPrivateKey;
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private final Cipher clientPublicCipher;
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private final Cipher clientPrivateCipher;
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{
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clientPublicKey = new RSAPublicKeySpec(new BigInteger("110765265706288445432931740098429930486184776709780238438557625017629729661573053311960037088088056476891441153774532896215697933861615265976216025080531157954939381061122847093245480153835410088489980899310444547515616362801564379991216339336084947840837937083577860481298666622413144703510357744423856873247"), new BigInteger("65537"));
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clientPrivateKey = new RSAPrivateKeySpec(new BigInteger("127165929499203230494093636558638013965252017663799535492473366241186172657381802456786953683177089298103209968185180374096740166047543803456852621212768600619629127825926162262624471403179175000577485553838478368190967564483813134073944752700839742123715548482599351441718070230200126591331603170595424433351"), new BigInteger("8120442115967552979504430611683477858989268564673406717365778685618263462946775764555188689810276923151226539464042905009305546407509816095746345114598417659887966619863710400187548253486545871530930302536230539029867970428580758154100440676071461522806034959078299053007522099777875429363283152166104624633"));
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serverPrivateKey = new RSAPrivateKeySpec(new BigInteger("110765265706288445432931740098429930486184776709780238438557625017629729661573053311960037088088056476891441153774532896215697933861615265976216025080531157954939381061122847093245480153835410088489980899310444547515616362801564379991216339336084947840837937083577860481298666622413144703510357744423856873247"), new BigInteger("46811199235043884723986609175064677734346396089701745030024727102450381043328026268845951862745851965156510759358732282931568208403881136178696846768321267356928789780189985031058525539943424151785807761491334305713351706700232920994479762308513198807509163912459260953727448797718901389753582140608347129153"));
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try {
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(clientPublicCipher = Cipher.getInstance("RSA")).init(1, KeyFactory.getInstance("RSA").generatePublic(clientPublicKey));
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(clientPrivateCipher = Cipher.getInstance("RSA")).init(2, KeyFactory.getInstance("RSA").generatePrivate(clientPrivateKey));
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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private void ctsEncode(ByteBuf buf, byte[][] md5s) {
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try {
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CompoundTag nbt = new CompoundTag("");
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ListTag strList = new ListTag("md5s", ByteArrayTag.class);
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for (final byte[] md5 : md5s) {
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strList.add(new ByteArrayTag("", md5));
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}
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nbt.put(strList);
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NBTIO.writeTag(new DataOutputStream(new ByteBufOutputStream(buf)), nbt);
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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private byte[] stcDecode(ByteBuf buf) {
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try {
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CompoundTag nbt = (CompoundTag) NBTIO.readTag(new DataInputStream(new ByteBufInputStream(buf)));
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return ((ByteArrayTag) nbt.get("salt")).getValue();
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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public byte[] encodeCPacket(String[] md5s, String salt) {
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try {
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HashSet<byte[]> rsaMd5s = new HashSet<byte[]>();
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for (String md5 : md5s) {
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rsaMd5s.add(clientPublicCipher.doFinal(md5(md5 + salt).getBytes()));
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}
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ByteBuf buf = Unpooled.buffer();
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buf.writeByte(1); // packet id
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ctsEncode(buf, rsaMd5s.toArray(new byte[0][]));
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return buf.array();
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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public String decodeSPacket(byte[] data) {
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try {
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ByteBuf buf = Unpooled.copiedBuffer(data);
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buf.readByte(); // packet id
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return new String(clientPrivateCipher.doFinal(stcDecode(buf)));
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} catch (Exception e) {
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throw new RuntimeException(e);
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}
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}
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public String md5(String str) {
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try {
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MessageDigest md = MessageDigest.getInstance("MD5");
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md.update(str.getBytes());
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byte[] digest = md.digest();
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return String.format("%0" + (digest.length << 1) + "x", new BigInteger(1, digest));
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} catch (NoSuchAlgorithmException e) {
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return null;
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}
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}
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}
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