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consolidate with existing utils class

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This commit is contained in:
Blue Kelp 2019-08-01 20:02:17 -07:00
parent 9bebfd5ded
commit 6f5c9a535e
3 changed files with 135 additions and 146 deletions
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8
connector/src/main/java/org/geysermc/connector/network/UpstreamPacketHandler.java
View file

@ -30,7 +30,7 @@ import com.nukkitx.protocol.bedrock.packet.*;
import org.geysermc.connector.GeyserConnector;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.network.translators.Registry;
import org.geysermc.connector.utils.AuthenticationUtils;
import org.geysermc.connector.utils.LoginEncryptionUtils;
public class UpstreamPacketHandler extends LoggingPacketHandler {
@ -52,7 +52,7 @@ public class UpstreamPacketHandler extends LoggingPacketHandler {
return true;
}
AuthenticationUtils.encryptPlayerConnection(connector, session, loginPacket);
LoginEncryptionUtils.encryptPlayerConnection(connector, session, loginPacket);
PlayStatusPacket playStatus = new PlayStatusPacket();
playStatus.setStatus(PlayStatusPacket.Status.LOGIN_SUCCESS);
@ -88,14 +88,14 @@ public class UpstreamPacketHandler extends LoggingPacketHandler {
@Override
public boolean handle(ModalFormResponsePacket packet) {
connector.getLogger().debug("Handled packet: " + packet.getClass().getSimpleName());
return AuthenticationUtils.authenticateFromForm(session, connector, packet.getFormData());
return LoginEncryptionUtils.authenticateFromForm(session, connector, packet.getFormData());
}
@Override
public boolean handle(MovePlayerPacket packet) {
connector.getLogger().debug("Handled packet: " + packet.getClass().getSimpleName());
if (!session.isLoggedIn()) {
AuthenticationUtils.showLoginWindow(session);
LoginEncryptionUtils.showLoginWindow(session);
return true;
}
return false;

139
connector/src/main/java/org/geysermc/connector/utils/AuthenticationUtils.java
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@ -1,139 +0,0 @@
package org.geysermc.connector.utils;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.JsonNodeType;
import com.nimbusds.jose.JWSObject;
import com.nukkitx.protocol.bedrock.packet.LoginPacket;
import com.nukkitx.protocol.bedrock.packet.ServerToClientHandshakePacket;
import com.nukkitx.protocol.bedrock.util.EncryptionUtils;
import net.minidev.json.JSONObject;
import org.geysermc.api.events.player.PlayerFormResponseEvent;
import org.geysermc.api.window.CustomFormBuilder;
import org.geysermc.api.window.CustomFormWindow;
import org.geysermc.api.window.FormWindow;
import org.geysermc.api.window.component.InputComponent;
import org.geysermc.api.window.component.LabelComponent;
import org.geysermc.api.window.response.CustomFormResponse;
import org.geysermc.connector.GeyserConnector;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.network.session.auth.BedrockAuthData;
import org.geysermc.connector.network.session.cache.WindowCache;
import javax.crypto.SecretKey;
import java.io.IOException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PublicKey;
import java.security.interfaces.ECPublicKey;
import java.security.spec.ECGenParameterSpec;
import java.util.UUID;
public class AuthenticationUtils {
public static void encryptPlayerConnection(GeyserConnector connector, GeyserSession session, LoginPacket loginPacket) {
JsonNode certData;
try {
certData = LoginEncryptionUtils.JSON_MAPPER.readTree(loginPacket.getChainData().toByteArray());
} catch (IOException ex) {
throw new RuntimeException("Certificate JSON can not be read.");
}
JsonNode certChainData = certData.get("chain");
if (certChainData.getNodeType() != JsonNodeType.ARRAY) {
throw new RuntimeException("Certificate data is not valid");
}
encryptConnectionWithCert(connector, session, loginPacket.getSkinData().toString(), certData);
}
private static void encryptConnectionWithCert(GeyserConnector connector, GeyserSession session, String playerSkin, JsonNode certChainData) {
try {
boolean validChain = LoginEncryptionUtils.validateChainData(certChainData);
connector.getLogger().debug(String.format("Is player data valid? %s", validChain));
JWSObject jwt = JWSObject.parse(certChainData.get(certChainData.size() - 1).asText());
JsonNode payload = LoginEncryptionUtils.JSON_MAPPER.readTree(jwt.getPayload().toBytes());
if (payload.get("extraData").getNodeType() != JsonNodeType.OBJECT) {
throw new RuntimeException("AuthData was not found!");
}
JSONObject extraData = (JSONObject) jwt.getPayload().toJSONObject().get("extraData");
session.setAuthenticationData(new BedrockAuthData(extraData.getAsString("displayName"), UUID.fromString(extraData.getAsString("identity")), extraData.getAsString("XUID")));
if (payload.get("identityPublicKey").getNodeType() != JsonNodeType.STRING) {
throw new RuntimeException("Identity Public Key was not found!");
}
ECPublicKey identityPublicKey = EncryptionUtils.generateKey(payload.get("identityPublicKey").textValue());
JWSObject clientJwt = JWSObject.parse(playerSkin);
EncryptionUtils.verifyJwt(clientJwt, identityPublicKey);
if (EncryptionUtils.canUseEncryption()) {
AuthenticationUtils.startEncryptionHandshake(session, identityPublicKey);
}
} catch (Exception ex) {
session.disconnect("disconnectionScreen.internalError.cantConnect");
throw new RuntimeException("Unable to complete login", ex);
}
}
private static void startEncryptionHandshake(GeyserSession session, PublicKey key) throws Exception {
KeyPairGenerator generator = KeyPairGenerator.getInstance("EC");
generator.initialize(new ECGenParameterSpec("secp384r1"));
KeyPair serverKeyPair = generator.generateKeyPair();
byte[] token = EncryptionUtils.generateRandomToken();
SecretKey encryptionKey = EncryptionUtils.getSecretKey(serverKeyPair.getPrivate(), key, token);
session.getUpstream().enableEncryption(encryptionKey);
ServerToClientHandshakePacket packet = new ServerToClientHandshakePacket();
packet.setJwt(EncryptionUtils.createHandshakeJwt(serverKeyPair, token).serialize());
session.getUpstream().sendPacketImmediately(packet);
}
private static int AUTH_FORM_ID = 1337;
public static void showLoginWindow(GeyserSession session) {
CustomFormWindow window = new CustomFormBuilder("Login")
.addComponent(new LabelComponent("Minecraft: Java Edition account authentication."))
.addComponent(new LabelComponent("Enter the credentials for your Minecraft: Java Edition account below."))
.addComponent(new InputComponent("Email/Username", "account@geysermc.org", ""))
.addComponent(new InputComponent("Password", "123456", ""))
.build();
session.sendForm(window, AUTH_FORM_ID);
}
public static boolean authenticateFromForm(GeyserSession session, GeyserConnector connector, String formData) {
WindowCache windowCache = session.getWindowCache();
if (!windowCache.getWindows().containsKey(AUTH_FORM_ID))
return false;
FormWindow window = windowCache.getWindows().remove(AUTH_FORM_ID);
window.setResponse(formData.trim());
if (session.isLoggedIn()) {
PlayerFormResponseEvent event = new PlayerFormResponseEvent(session, AUTH_FORM_ID, window);
connector.getPluginManager().runEvent(event);
} else {
if (window instanceof CustomFormWindow) {
CustomFormWindow customFormWindow = (CustomFormWindow) window;
if (!customFormWindow.getTitle().equals("Login"))
return false;
CustomFormResponse response = (CustomFormResponse) customFormWindow.getResponse();
String username = response.getInputResponses().get(2);
String password = response.getInputResponses().get(3);
session.authenticate(username, password);
// TODO should we clear the window cache in all cases or just if not already logged in?
// Clear windows so authentication data isn't accidentally cached
windowCache.getWindows().clear();
}
}
return true;
}
}

134
connector/src/main/java/org/geysermc/connector/utils/LoginEncryptionUtils.java
View file

@ -6,15 +6,35 @@ import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.JsonNodeType;
import com.nimbusds.jose.JWSObject;
import com.nukkitx.network.util.Preconditions;
import com.nukkitx.protocol.bedrock.packet.LoginPacket;
import com.nukkitx.protocol.bedrock.packet.ServerToClientHandshakePacket;
import com.nukkitx.protocol.bedrock.util.EncryptionUtils;
import net.minidev.json.JSONObject;
import org.geysermc.api.events.player.PlayerFormResponseEvent;
import org.geysermc.api.window.CustomFormBuilder;
import org.geysermc.api.window.CustomFormWindow;
import org.geysermc.api.window.FormWindow;
import org.geysermc.api.window.component.InputComponent;
import org.geysermc.api.window.component.LabelComponent;
import org.geysermc.api.window.response.CustomFormResponse;
import org.geysermc.connector.GeyserConnector;
import org.geysermc.connector.network.session.GeyserSession;
import org.geysermc.connector.network.session.auth.BedrockAuthData;
import org.geysermc.connector.network.session.cache.WindowCache;
import javax.crypto.SecretKey;
import java.io.IOException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PublicKey;
import java.security.interfaces.ECPublicKey;
import java.security.spec.ECGenParameterSpec;
import java.util.UUID;
public class LoginEncryptionUtils {
private static final ObjectMapper JSON_MAPPER = new ObjectMapper().disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
public static final ObjectMapper JSON_MAPPER = new ObjectMapper().disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
public static boolean validateChainData(JsonNode data) throws Exception {
private static boolean validateChainData(JsonNode data) throws Exception {
ECPublicKey lastKey = null;
boolean validChain = false;
for (JsonNode node : data) {
@ -35,4 +55,112 @@ public class LoginEncryptionUtils {
}
return validChain;
}
public static void encryptPlayerConnection(GeyserConnector connector, GeyserSession session, LoginPacket loginPacket) {
JsonNode certData;
try {
certData = JSON_MAPPER.readTree(loginPacket.getChainData().toByteArray());
} catch (IOException ex) {
throw new RuntimeException("Certificate JSON can not be read.");
}
JsonNode certChainData = certData.get("chain");
if (certChainData.getNodeType() != JsonNodeType.ARRAY) {
throw new RuntimeException("Certificate data is not valid");
}
encryptConnectionWithCert(connector, session, loginPacket.getSkinData().toString(), certData);
}
private static void encryptConnectionWithCert(GeyserConnector connector, GeyserSession session, String playerSkin, JsonNode certChainData) {
try {
boolean validChain = validateChainData(certChainData);
connector.getLogger().debug(String.format("Is player data valid? %s", validChain));
JWSObject jwt = JWSObject.parse(certChainData.get(certChainData.size() - 1).asText());
JsonNode payload = JSON_MAPPER.readTree(jwt.getPayload().toBytes());
if (payload.get("extraData").getNodeType() != JsonNodeType.OBJECT) {
throw new RuntimeException("AuthData was not found!");
}
JSONObject extraData = (JSONObject) jwt.getPayload().toJSONObject().get("extraData");
session.setAuthenticationData(new BedrockAuthData(extraData.getAsString("displayName"), UUID.fromString(extraData.getAsString("identity")), extraData.getAsString("XUID")));
if (payload.get("identityPublicKey").getNodeType() != JsonNodeType.STRING) {
throw new RuntimeException("Identity Public Key was not found!");
}
ECPublicKey identityPublicKey = EncryptionUtils.generateKey(payload.get("identityPublicKey").textValue());
JWSObject clientJwt = JWSObject.parse(playerSkin);
EncryptionUtils.verifyJwt(clientJwt, identityPublicKey);
if (EncryptionUtils.canUseEncryption()) {
LoginEncryptionUtils.startEncryptionHandshake(session, identityPublicKey);
}
} catch (Exception ex) {
session.disconnect("disconnectionScreen.internalError.cantConnect");
throw new RuntimeException("Unable to complete login", ex);
}
}
private static void startEncryptionHandshake(GeyserSession session, PublicKey key) throws Exception {
KeyPairGenerator generator = KeyPairGenerator.getInstance("EC");
generator.initialize(new ECGenParameterSpec("secp384r1"));
KeyPair serverKeyPair = generator.generateKeyPair();
byte[] token = EncryptionUtils.generateRandomToken();
SecretKey encryptionKey = EncryptionUtils.getSecretKey(serverKeyPair.getPrivate(), key, token);
session.getUpstream().enableEncryption(encryptionKey);
ServerToClientHandshakePacket packet = new ServerToClientHandshakePacket();
packet.setJwt(EncryptionUtils.createHandshakeJwt(serverKeyPair, token).serialize());
session.getUpstream().sendPacketImmediately(packet);
}
private static int AUTH_FORM_ID = 1337;
public static void showLoginWindow(GeyserSession session) {
CustomFormWindow window = new CustomFormBuilder("Login")
.addComponent(new LabelComponent("Minecraft: Java Edition account authentication."))
.addComponent(new LabelComponent("Enter the credentials for your Minecraft: Java Edition account below."))
.addComponent(new InputComponent("Email/Username", "account@geysermc.org", ""))
.addComponent(new InputComponent("Password", "123456", ""))
.build();
session.sendForm(window, AUTH_FORM_ID);
}
public static boolean authenticateFromForm(GeyserSession session, GeyserConnector connector, String formData) {
WindowCache windowCache = session.getWindowCache();
if (!windowCache.getWindows().containsKey(AUTH_FORM_ID))
return false;
FormWindow window = windowCache.getWindows().remove(AUTH_FORM_ID);
window.setResponse(formData.trim());
if (session.isLoggedIn()) {
PlayerFormResponseEvent event = new PlayerFormResponseEvent(session, AUTH_FORM_ID, window);
connector.getPluginManager().runEvent(event);
} else {
if (window instanceof CustomFormWindow) {
CustomFormWindow customFormWindow = (CustomFormWindow) window;
if (!customFormWindow.getTitle().equals("Login"))
return false;
CustomFormResponse response = (CustomFormResponse) customFormWindow.getResponse();
String username = response.getInputResponses().get(2);
String password = response.getInputResponses().get(3);
session.authenticate(username, password);
// TODO should we clear the window cache in all cases or just if not already logged in?
// Clear windows so authentication data isn't accidentally cached
windowCache.getWindows().clear();
}
}
return true;
}
}