mirror of
https://github.com/GeyserMC/Geyser.git
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329 lines
15 KiB
Java
329 lines
15 KiB
Java
/*
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* Copyright (c) 2019-2021 GeyserMC. http://geysermc.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @author GeyserMC
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* @link https://github.com/GeyserMC/Geyser
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*/
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package org.geysermc.geyser.util;
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import com.fasterxml.jackson.databind.DeserializationFeature;
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import com.fasterxml.jackson.databind.JsonNode;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.node.JsonNodeType;
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import com.github.steveice10.mc.auth.service.MsaAuthenticationService;
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import com.nimbusds.jose.JWSObject;
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import com.nimbusds.jose.shaded.json.JSONObject;
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import com.nimbusds.jose.shaded.json.JSONValue;
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import com.nukkitx.network.util.Preconditions;
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import com.nukkitx.protocol.bedrock.packet.LoginPacket;
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import com.nukkitx.protocol.bedrock.packet.ServerToClientHandshakePacket;
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import com.nukkitx.protocol.bedrock.util.EncryptionUtils;
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import org.geysermc.geyser.GeyserImpl;
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import org.geysermc.geyser.configuration.GeyserConfiguration;
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import org.geysermc.geyser.session.GeyserSession;
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import org.geysermc.geyser.session.auth.AuthData;
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import org.geysermc.geyser.session.auth.BedrockClientData;
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import org.geysermc.cumulus.CustomForm;
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import org.geysermc.cumulus.ModalForm;
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import org.geysermc.cumulus.SimpleForm;
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import org.geysermc.cumulus.response.CustomFormResponse;
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import org.geysermc.cumulus.response.ModalFormResponse;
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import org.geysermc.cumulus.response.SimpleFormResponse;
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import org.geysermc.geyser.text.GeyserLocale;
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import javax.crypto.SecretKey;
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import java.io.IOException;
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import java.net.URI;
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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import java.security.PublicKey;
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import java.security.interfaces.ECPublicKey;
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import java.security.spec.ECGenParameterSpec;
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import java.util.Iterator;
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import java.util.UUID;
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public class LoginEncryptionUtils {
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private static final ObjectMapper JSON_MAPPER = new ObjectMapper().disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
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private static boolean HAS_SENT_ENCRYPTION_MESSAGE = false;
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private static boolean validateChainData(JsonNode data) throws Exception {
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if (data.size() != 3) {
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return false;
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}
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ECPublicKey lastKey = null;
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boolean mojangSigned = false;
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Iterator<JsonNode> iterator = data.iterator();
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while (iterator.hasNext()) {
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JsonNode node = iterator.next();
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JWSObject jwt = JWSObject.parse(node.asText());
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// x509 cert is expected in every claim
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URI x5u = jwt.getHeader().getX509CertURL();
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if (x5u == null) {
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return false;
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}
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ECPublicKey expectedKey = EncryptionUtils.generateKey(jwt.getHeader().getX509CertURL().toString());
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// First key is self-signed
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if (lastKey == null) {
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lastKey = expectedKey;
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} else if (!lastKey.equals(expectedKey)) {
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return false;
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}
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if (!EncryptionUtils.verifyJwt(jwt, lastKey)) {
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return false;
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}
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if (mojangSigned) {
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return !iterator.hasNext();
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}
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if (lastKey.equals(EncryptionUtils.getMojangPublicKey())) {
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mojangSigned = true;
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}
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Object payload = JSONValue.parse(jwt.getPayload().toString());
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Preconditions.checkArgument(payload instanceof JSONObject, "Payload is not an object");
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Object identityPublicKey = ((JSONObject) payload).get("identityPublicKey");
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Preconditions.checkArgument(identityPublicKey instanceof String, "identityPublicKey node is missing in chain");
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lastKey = EncryptionUtils.generateKey((String) identityPublicKey);
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}
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return mojangSigned;
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}
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public static void encryptPlayerConnection(GeyserSession session, LoginPacket loginPacket) {
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JsonNode certData;
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try {
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certData = JSON_MAPPER.readTree(loginPacket.getChainData().toByteArray());
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} catch (IOException ex) {
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throw new RuntimeException("Certificate JSON can not be read.");
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}
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JsonNode certChainData = certData.get("chain");
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if (certChainData.getNodeType() != JsonNodeType.ARRAY) {
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throw new RuntimeException("Certificate data is not valid");
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}
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encryptConnectionWithCert(session, loginPacket.getSkinData().toString(), certChainData);
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}
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private static void encryptConnectionWithCert(GeyserSession session, String clientData, JsonNode certChainData) {
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try {
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GeyserImpl geyser = session.getGeyser();
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boolean validChain = validateChainData(certChainData);
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geyser.getLogger().debug(String.format("Is player data valid? %s", validChain));
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if (!validChain && !session.getGeyser().getConfig().isEnableProxyConnections()) {
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session.disconnect(GeyserLocale.getLocaleStringLog("geyser.network.remote.invalid_xbox_account"));
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return;
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}
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JWSObject jwt = JWSObject.parse(certChainData.get(certChainData.size() - 1).asText());
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JsonNode payload = JSON_MAPPER.readTree(jwt.getPayload().toBytes());
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if (payload.get("extraData").getNodeType() != JsonNodeType.OBJECT) {
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throw new RuntimeException("AuthData was not found!");
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}
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JsonNode extraData = payload.get("extraData");
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session.setAuthenticationData(new AuthData(
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extraData.get("displayName").asText(),
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UUID.fromString(extraData.get("identity").asText()),
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extraData.get("XUID").asText(),
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certChainData, clientData
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));
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if (payload.get("identityPublicKey").getNodeType() != JsonNodeType.STRING) {
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throw new RuntimeException("Identity Public Key was not found!");
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}
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ECPublicKey identityPublicKey = EncryptionUtils.generateKey(payload.get("identityPublicKey").textValue());
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JWSObject clientJwt = JWSObject.parse(clientData);
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EncryptionUtils.verifyJwt(clientJwt, identityPublicKey);
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JsonNode clientDataJson = JSON_MAPPER.readTree(clientJwt.getPayload().toBytes());
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BedrockClientData data = JSON_MAPPER.convertValue(clientDataJson, BedrockClientData.class);
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session.setClientData(data);
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if (EncryptionUtils.canUseEncryption()) {
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try {
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LoginEncryptionUtils.startEncryptionHandshake(session, identityPublicKey);
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} catch (Throwable e) {
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// An error can be thrown on older Java 8 versions about an invalid key
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if (geyser.getConfig().isDebugMode()) {
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e.printStackTrace();
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}
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sendEncryptionFailedMessage(geyser);
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}
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} else {
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sendEncryptionFailedMessage(geyser);
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}
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} catch (Exception ex) {
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session.disconnect("disconnectionScreen.internalError.cantConnect");
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throw new RuntimeException("Unable to complete login", ex);
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}
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}
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private static void startEncryptionHandshake(GeyserSession session, PublicKey key) throws Exception {
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KeyPairGenerator generator = KeyPairGenerator.getInstance("EC");
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generator.initialize(new ECGenParameterSpec("secp384r1"));
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KeyPair serverKeyPair = generator.generateKeyPair();
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byte[] token = EncryptionUtils.generateRandomToken();
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SecretKey encryptionKey = EncryptionUtils.getSecretKey(serverKeyPair.getPrivate(), key, token);
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session.getUpstream().getSession().enableEncryption(encryptionKey);
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ServerToClientHandshakePacket packet = new ServerToClientHandshakePacket();
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packet.setJwt(EncryptionUtils.createHandshakeJwt(serverKeyPair, token).serialize());
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session.sendUpstreamPacketImmediately(packet);
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}
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private static void sendEncryptionFailedMessage(GeyserImpl geyser) {
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if (!HAS_SENT_ENCRYPTION_MESSAGE) {
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geyser.getLogger().warning(GeyserLocale.getLocaleStringLog("geyser.network.encryption.line_1"));
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geyser.getLogger().warning(GeyserLocale.getLocaleStringLog("geyser.network.encryption.line_2", "https://geysermc.org/supported_java"));
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HAS_SENT_ENCRYPTION_MESSAGE = true;
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}
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}
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public static void buildAndShowLoginWindow(GeyserSession session) {
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// Set DoDaylightCycle to false so the time doesn't accelerate while we're here
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session.setDaylightCycle(false);
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GeyserConfiguration config = session.getGeyser().getConfig();
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boolean isPasswordAuthEnabled = config.getRemote().isPasswordAuthentication();
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session.sendForm(
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SimpleForm.builder()
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.translator(GeyserLocale::getPlayerLocaleString, session.getLocale())
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.title("geyser.auth.login.form.notice.title")
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.content("geyser.auth.login.form.notice.desc")
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.optionalButton("geyser.auth.login.form.notice.btn_login.mojang", isPasswordAuthEnabled)
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.button("geyser.auth.login.form.notice.btn_login.microsoft")
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.button("geyser.auth.login.form.notice.btn_disconnect")
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.responseHandler((form, responseData) -> {
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SimpleFormResponse response = form.parseResponse(responseData);
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if (!response.isCorrect()) {
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buildAndShowLoginWindow(session);
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return;
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}
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if (isPasswordAuthEnabled && response.getClickedButtonId() == 0) {
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session.setMicrosoftAccount(false);
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buildAndShowLoginDetailsWindow(session);
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return;
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}
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if (isPasswordAuthEnabled && response.getClickedButtonId() == 1) {
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session.setMicrosoftAccount(true);
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buildAndShowMicrosoftAuthenticationWindow(session);
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return;
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}
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if (response.getClickedButtonId() == 0) {
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// Just show the OAuth code
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session.authenticateWithMicrosoftCode();
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return;
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}
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session.disconnect(GeyserLocale.getPlayerLocaleString("geyser.auth.login.form.disconnect", session.getLocale()));
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}));
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}
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public static void buildAndShowLoginDetailsWindow(GeyserSession session) {
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session.sendForm(
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CustomForm.builder()
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.translator(GeyserLocale::getPlayerLocaleString, session.getLocale())
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.title("geyser.auth.login.form.details.title")
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.label("geyser.auth.login.form.details.desc")
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.input("geyser.auth.login.form.details.email", "account@geysermc.org", "")
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.input("geyser.auth.login.form.details.pass", "123456", "")
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.responseHandler((form, responseData) -> {
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CustomFormResponse response = form.parseResponse(responseData);
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if (!response.isCorrect()) {
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buildAndShowLoginDetailsWindow(session);
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return;
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}
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session.authenticate(response.next(), response.next());
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}));
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}
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/**
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* Prompts the user between either OAuth code login or manual password authentication
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*/
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public static void buildAndShowMicrosoftAuthenticationWindow(GeyserSession session) {
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session.sendForm(
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SimpleForm.builder()
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.translator(GeyserLocale::getPlayerLocaleString, session.getLocale())
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.title("geyser.auth.login.form.notice.btn_login.microsoft")
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.button("geyser.auth.login.method.browser")
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.button("geyser.auth.login.method.password")
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.button("geyser.auth.login.form.notice.btn_disconnect")
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.responseHandler((form, responseData) -> {
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SimpleFormResponse response = form.parseResponse(responseData);
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if (!response.isCorrect()) {
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buildAndShowLoginWindow(session);
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return;
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}
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if (response.getClickedButtonId() == 0) {
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session.authenticateWithMicrosoftCode();
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} else if (response.getClickedButtonId() == 1) {
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buildAndShowLoginDetailsWindow(session);
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} else {
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session.disconnect(GeyserLocale.getPlayerLocaleString("geyser.auth.login.form.disconnect", session.getLocale()));
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}
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}));
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}
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/**
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* Shows the code that a user must input into their browser
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*/
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public static void buildAndShowMicrosoftCodeWindow(GeyserSession session, MsaAuthenticationService.MsCodeResponse msCode) {
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session.sendForm(
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ModalForm.builder()
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.title("%xbox.signin")
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.content("%xbox.signin.website\n%xbox.signin.url\n%xbox.signin.enterCode\n" + msCode.user_code)
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.button1("%gui.done")
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.button2("%menu.disconnect")
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.responseHandler((form, responseData) -> {
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ModalFormResponse response = form.parseResponse(responseData);
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if (!response.isCorrect()) {
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buildAndShowMicrosoftAuthenticationWindow(session);
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return;
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}
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if (response.getClickedButtonId() == 1) {
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session.disconnect(GeyserLocale.getPlayerLocaleString("geyser.auth.login.form.disconnect", session.getLocale()));
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}
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})
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);
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}
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}
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