[ANY] Add OpenID auth module (#709)

Co-authored-by: d3coder <admin@xakeps.dk>

LaunchServer/build.gradle

@@ -88,6 +88,7 @@ pack project(':LauncherModernCore')
     bundle group: 'org.slf4j', name: 'slf4j-api', version: rootProject['verSlf4j']
     bundle group: 'com.mysql', name: 'mysql-connector-j', version: rootProject['verMySQLConn']
     bundle group: 'org.postgresql', name: 'postgresql', version: rootProject['verPostgreSQLConn']
+    bundle group: 'com.h2database', name: 'h2', version: rootProject['verH2Conn']
     bundle group: 'com.guardsquare', name: 'proguard-base', version: rootProject['verProguard']
     bundle group: 'org.apache.logging.log4j', name: 'log4j-core', version: rootProject['verLog4j']
     bundle group: 'org.apache.logging.log4j', name: 'log4j-slf4j-impl', version: rootProject['verLog4j']

LaunchServer/src/main/java/pro/gravit/launchserver/auth/AuthException.java

@@ -16,6 +16,10 @@ public AuthException(String message) {
         super(message);
     }
 
+    public AuthException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
     public static AuthException need2FA() {
         return new AuthException(AuthRequestEvent.TWO_FACTOR_NEED_ERROR_MESSAGE);
     }

LaunchServer/src/main/java/pro/gravit/launchserver/auth/HikariSQLSourceConfig.java

@@ -0,0 +1,50 @@
+package pro.gravit.launchserver.auth;
+
+import com.zaxxer.hikari.HikariConfig;
+import com.zaxxer.hikari.HikariDataSource;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.util.Properties;
+import java.util.function.Consumer;
+
+public class HikariSQLSourceConfig implements SQLSourceConfig {
+    private transient HikariDataSource dataSource;
+    private String dsClass;
+    private Properties dsProps;
+    private String driverClass;
+    private String jdbcUrl;
+    private String username;
+    private String password;
+
+    public void init() {
+        if (dataSource != null) {
+            return;
+        }
+        HikariConfig config = new HikariConfig();
+        consumeIfNotNull(config::setDataSourceClassName, dsClass);
+        consumeIfNotNull(config::setDataSourceProperties, dsProps);
+        consumeIfNotNull(config::setDriverClassName, driverClass);
+        consumeIfNotNull(config::setJdbcUrl, jdbcUrl);
+        consumeIfNotNull(config::setUsername, username);
+        consumeIfNotNull(config::setPassword, password);
+
+        this.dataSource = new HikariDataSource(config);
+    }
+
+    @Override
+    public Connection getConnection() throws SQLException {
+        return dataSource.getConnection();
+    }
+
+    @Override
+    public void close() {
+        dataSource.close();
+    }
+
+    private static <T> void consumeIfNotNull(Consumer<T> consumer, T val) {
+        if (val != null) {
+            consumer.accept(val);
+        }
+    }
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/AuthCoreProvider.java

@@ -16,6 +16,7 @@
 import pro.gravit.launchserver.auth.core.interfaces.provider.AuthSupportGetAllUsers;
 import pro.gravit.launchserver.auth.core.interfaces.provider.AuthSupportHardware;
 import pro.gravit.launchserver.auth.core.interfaces.provider.AuthSupportRegistration;
+import pro.gravit.launchserver.auth.core.openid.OpenIDAuthCoreProvider;
 import pro.gravit.launchserver.manangers.AuthManager;
 import pro.gravit.launchserver.socket.Client;
 import pro.gravit.launchserver.socket.response.auth.AuthResponse;
@@ -45,6 +46,7 @@ public static void registerProviders() {
             providers.register("postgresql", PostgresSQLCoreProvider.class);
             providers.register("memory", MemoryAuthCoreProvider.class);
             providers.register("merge", MergeAuthCoreProvider.class);
+            providers.register("openid", OpenIDAuthCoreProvider.class);
             registredProviders = true;
         }
     }

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/AccessTokenResponse.java

@@ -0,0 +1,14 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import com.google.gson.annotations.SerializedName;
+
+public record AccessTokenResponse(@SerializedName("access_token") String accessToken,
+                                  @SerializedName("expires_in") Long expiresIn,
+                                  @SerializedName("refresh_expires_in") Long refreshExpiresIn,
+                                  @SerializedName("refresh_token") String refreshToken,
+                                  @SerializedName("token_type") String tokenType,
+                                  @SerializedName("id_token") String idToken,
+                                  @SerializedName("not-before-policy") Integer notBeforePolicy,
+                                  @SerializedName("session_state") String sessionState,
+                                  @SerializedName("scope") String scope) {
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/OpenIDAuthCoreProvider.java

@@ -0,0 +1,178 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import io.jsonwebtoken.JwtException;
+import io.jsonwebtoken.Jwts;
+import pro.gravit.launcher.ClientPermissions;
+import pro.gravit.launcher.events.request.GetAvailabilityAuthRequestEvent;
+import pro.gravit.launcher.request.auth.AuthRequest;
+import pro.gravit.launcher.request.auth.password.AuthCodePassword;
+import pro.gravit.launchserver.LaunchServer;
+import pro.gravit.launchserver.auth.AuthException;
+import pro.gravit.launchserver.auth.HikariSQLSourceConfig;
+import pro.gravit.launchserver.auth.core.AuthCoreProvider;
+import pro.gravit.launchserver.auth.core.User;
+import pro.gravit.launchserver.auth.core.UserSession;
+import pro.gravit.launchserver.manangers.AuthManager;
+import pro.gravit.launchserver.socket.Client;
+import pro.gravit.launchserver.socket.response.auth.AuthResponse;
+import pro.gravit.utils.helper.LogHelper;
+
+import java.io.IOException;
+import java.time.Instant;
+import java.time.temporal.ChronoUnit;
+import java.util.Date;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+public class OpenIDAuthCoreProvider extends AuthCoreProvider {
+    private transient SQLUserStore sqlUserStore;
+    private transient SQLServerSessionStore sqlSessionStore;
+    private transient OpenIDAuthenticator openIDAuthenticator;
+    private transient LaunchServer server;
+
+    private OpenIDConfig openIDConfig;
+    private HikariSQLSourceConfig sqlSourceConfig;
+
+    @Override
+    public List<GetAvailabilityAuthRequestEvent.AuthAvailabilityDetails> getDetails(Client client) {
+        return openIDAuthenticator.getDetails();
+    }
+
+    @Override
+    public User getUserByUsername(String username) {
+        return sqlUserStore.getByUsername(username);
+    }
+
+    @Override
+    public User getUserByUUID(UUID uuid) {
+        return sqlUserStore.getUserByUUID(uuid);
+    }
+
+    @Override
+    public UserSession getUserSessionByOAuthAccessToken(String accessToken) throws OAuthAccessTokenExpired {
+        return openIDAuthenticator.getUserSessionByOAuthAccessToken(accessToken);
+    }
+
+    @Override
+    public AuthManager.AuthReport refreshAccessToken(String oldRefreshToken, AuthResponse.AuthContext context) {
+        var tokens = openIDAuthenticator.refreshAccessToken(oldRefreshToken);
+        var accessToken = tokens.accessToken();
+        var refreshToken = tokens.refreshToken();
+        long expiresIn = TimeUnit.SECONDS.toMillis(tokens.accessTokenExpiresIn());
+
+        UserSession session;
+        try {
+            session = openIDAuthenticator.getUserSessionByOAuthAccessToken(accessToken);
+        } catch (OAuthAccessTokenExpired e) {
+            throw new RuntimeException("invalid token", e);
+        }
+
+
+        return AuthManager.AuthReport.ofOAuth(accessToken, refreshToken,
+                expiresIn, session);
+    }
+
+    @Override
+    public AuthManager.AuthReport authorize(String login, AuthResponse.AuthContext context, AuthRequest.AuthPasswordInterface password, boolean minecraftAccess) throws IOException {
+        if (password == null) {
+            throw AuthException.wrongPassword();
+        }
+        var authCodePassword = (AuthCodePassword) password;
+
+        var tokens = openIDAuthenticator.authorize(authCodePassword);
+
+        var accessToken = tokens.accessToken();
+        var refreshToken = tokens.refreshToken();
+        var user = openIDAuthenticator.createUserFromToken(accessToken);
+        long expiresIn = TimeUnit.SECONDS.toMillis(tokens.accessTokenExpiresIn());
+
+        sqlUserStore.createOrUpdateUser(user);
+
+        UserSession session;
+        try {
+            session = openIDAuthenticator.getUserSessionByOAuthAccessToken(accessToken);
+        } catch (OAuthAccessTokenExpired e) {
+            throw new AuthException("invalid token", e);
+        }
+
+        if (minecraftAccess) {
+            var minecraftToken = generateMinecraftToken(user);
+            return AuthManager.AuthReport.ofOAuthWithMinecraft(minecraftToken, accessToken, refreshToken,
+                    expiresIn, session);
+        } else {
+            return AuthManager.AuthReport.ofOAuth(accessToken, refreshToken,
+                    expiresIn, session);
+        }
+    }
+
+    private String generateMinecraftToken(User user) {
+        return Jwts.builder()
+                .issuer("LaunchServer")
+                .subject(user.getUUID().toString())
+                .claim("preferred_username", user.getUsername())
+                .expiration(Date.from(Instant.now().plus(24, ChronoUnit.HOURS)))
+                .signWith(server.keyAgreementManager.ecdsaPrivateKey)
+                .compact();
+    }
+
+    private User createUserFromMinecraftToken(String accessToken) throws AuthException {
+        try {
+            var parser = Jwts.parser()
+                    .requireIssuer("LaunchServer")
+                    .verifyWith(server.keyAgreementManager.ecdsaPublicKey)
+                    .build();
+            var claims = parser.parseSignedClaims(accessToken);
+            var username = claims.getPayload().get("preferred_username", String.class);
+            var uuid = UUID.fromString(claims.getPayload().getSubject());
+            return new UserEntity(username, uuid, new ClientPermissions());
+        } catch (JwtException e) {
+            throw new AuthException("Bad minecraft token", e);
+        }
+    }
+
+    @Override
+    public void init(LaunchServer server) {
+        this.server = server;
+        this.sqlSourceConfig.init();
+        this.sqlUserStore = new SQLUserStore(sqlSourceConfig);
+        this.sqlUserStore.init();
+        this.sqlSessionStore = new SQLServerSessionStore(sqlSourceConfig);
+        this.sqlSessionStore.init();
+        this.openIDAuthenticator = new OpenIDAuthenticator(openIDConfig);
+    }
+
+    @Override
+    public User checkServer(Client client, String username, String serverID) throws IOException {
+        var savedServerId = sqlSessionStore.getServerIdByUsername(username);
+        if (!serverID.equals(savedServerId)) {
+            return null;
+        }
+
+        return sqlUserStore.getByUsername(username);
+    }
+
+    @Override
+    public boolean joinServer(Client client, String username, UUID uuid, String accessToken, String serverID) throws IOException {
+        User user;
+        try {
+            user = createUserFromMinecraftToken(accessToken);
+        } catch (AuthException e) {
+            LogHelper.error(e);
+            return false;
+        }
+        if (!user.getUUID().equals(uuid)) {
+            return false;
+        }
+
+        sqlUserStore.createOrUpdateUser(user);
+
+        return sqlSessionStore.joinServer(user.getUUID(), user.getUsername(), serverID);
+    }
+
+    @Override
+    public void close() {
+        sqlSourceConfig.close();
+    }
+
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/OpenIDAuthenticator.java

@@ -0,0 +1,229 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import io.jsonwebtoken.*;
+import io.jsonwebtoken.security.Jwk;
+import io.jsonwebtoken.security.JwkSet;
+import io.jsonwebtoken.security.Jwks;
+import pro.gravit.launcher.ClientPermissions;
+import pro.gravit.launcher.Launcher;
+import pro.gravit.launcher.events.request.GetAvailabilityAuthRequestEvent;
+import pro.gravit.launcher.request.auth.details.AuthWebViewDetails;
+import pro.gravit.launcher.request.auth.password.AuthCodePassword;
+import pro.gravit.launchserver.auth.AuthException;
+import pro.gravit.launchserver.auth.core.AuthCoreProvider;
+import pro.gravit.launchserver.auth.core.User;
+import pro.gravit.launchserver.auth.core.UserSession;
+import pro.gravit.utils.helper.CommonHelper;
+import pro.gravit.utils.helper.QueryHelper;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.security.Key;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.UUID;
+import java.util.stream.Collectors;
+
+public class OpenIDAuthenticator {
+    private static final HttpClient CLIENT = HttpClient.newBuilder().build();
+    private final OpenIDConfig openIDConfig;
+    private final JwtParser jwtParser;
+
+    public OpenIDAuthenticator(OpenIDConfig openIDConfig) {
+        this.openIDConfig = openIDConfig;
+        var keyLocator = loadKeyLocator(openIDConfig);
+        this.jwtParser = Jwts.parser().keyLocator(keyLocator)
+                .build();
+    }
+
+    public List<GetAvailabilityAuthRequestEvent.AuthAvailabilityDetails> getDetails() {
+        var state = UUID.randomUUID().toString();
+        var uri = QueryBuilder.get(openIDConfig.authorizationEndpoint())
+                .addQuery("response_type", "code")
+                .addQuery("client_id", openIDConfig.clientId())
+                .addQuery("redirect_uri", openIDConfig.redirectUri())
+                .addQuery("scope", openIDConfig.scopes())
+                .addQuery("state", state)
+                .toUriString();
+
+        return List.of(new AuthWebViewDetails(uri, openIDConfig.redirectUri()));
+    }
+
+    public TokenResponse refreshAccessToken(String oldRefreshToken) {
+        var postBody = QueryBuilder.post()
+                .addQuery("grant_type", "refresh_token")
+                .addQuery("refresh_token", oldRefreshToken)
+                .addQuery("client_id", openIDConfig.clientId())
+                .addQuery("client_secret", openIDConfig.clientSecret())
+                .toString();
+
+        var accessTokenResponse = requestToken(postBody);
+        var accessToken = accessTokenResponse.accessToken();
+        var refreshToken = accessTokenResponse.refreshToken();
+
+        try {
+            readAndVerifyToken(accessToken);
+        } catch (AuthException e) {
+            throw new RuntimeException(e);
+        }
+
+        var accessTokenExpiresIn = Objects.requireNonNullElse(accessTokenResponse.expiresIn(), 0L);
+        var refreshTokenExpiresIn = Objects.requireNonNullElse(accessTokenResponse.refreshExpiresIn(), 0L);
+
+        return new TokenResponse(accessToken, accessTokenExpiresIn,
+                refreshToken, refreshTokenExpiresIn);
+    }
+
+    public UserSession getUserSessionByOAuthAccessToken(String accessToken) throws AuthCoreProvider.OAuthAccessTokenExpired {
+        Jws<Claims> token;
+        try {
+            token = readAndVerifyToken(accessToken);
+        } catch (AuthException e) {
+            throw new AuthCoreProvider.OAuthAccessTokenExpired("Can't read token", e);
+        }
+        var user = createUserFromToken(token);
+        long expiresIn = 0;
+        var expDate = token.getPayload().getExpiration();
+        if (expDate != null) {
+            expiresIn = expDate.toInstant().toEpochMilli();
+        }
+
+        return new OpenIDUserSession(user, accessToken, expiresIn);
+    }
+
+    public TokenResponse authorize(AuthCodePassword authCode) throws IOException {
+        var uri = URI.create(authCode.uri);
+        var queries = QueryHelper.splitUriQuery(uri);
+
+        String code = CommonHelper.multimapFirstOrNullValue("code", queries);
+        String error = CommonHelper.multimapFirstOrNullValue("error", queries);
+        String errorDescription = CommonHelper.multimapFirstOrNullValue("error_description", queries);
+
+        if (error != null && !error.isBlank()) {
+            throw new AuthException("Auth error. Error: %s, description: %s".formatted(error, errorDescription));
+        }
+
+
+        var postBody = QueryBuilder.post()
+                .addQuery("grant_type", "authorization_code")
+                .addQuery("code", code)
+                .addQuery("redirect_uri", openIDConfig.redirectUri())
+                .addQuery("client_id", openIDConfig.clientId())
+                .addQuery("client_secret", openIDConfig.clientSecret())
+                .toString();
+
+        var accessTokenResponse = requestToken(postBody);
+        var accessToken = accessTokenResponse.accessToken();
+        var refreshToken = accessTokenResponse.refreshToken();
+
+        readAndVerifyToken(accessToken);
+
+        var accessTokenExpiresIn = Objects.requireNonNullElse(accessTokenResponse.expiresIn(), 0L);
+        var refreshTokenExpiresIn = Objects.requireNonNullElse(accessTokenResponse.refreshExpiresIn(), 0L);
+
+        return new TokenResponse(accessToken, accessTokenExpiresIn,
+                refreshToken, refreshTokenExpiresIn);
+    }
+
+    public User createUserFromToken(String accessToken) throws AuthException {
+        return createUserFromToken(readAndVerifyToken(accessToken));
+    }
+
+    private Jws<Claims> readAndVerifyToken(String accessToken) throws AuthException {
+        if (accessToken == null) {
+            throw new AuthException("Token is null");
+        }
+
+        try {
+            return jwtParser.parseSignedClaims(accessToken);
+        } catch (JwtException e) {
+            throw new AuthException("Bad token", e);
+        }
+    }
+
+    private User createUserFromToken(Jws<Claims> token) {
+        var username = token.getPayload().get(openIDConfig.extractorConfig().usernameClaim(), String.class);
+        var uuidStr = token.getPayload().get(openIDConfig.extractorConfig().uuidClaim(), String.class);
+        var uuid = UUID.fromString(uuidStr);
+        return new UserEntity(username, uuid, new ClientPermissions());
+    }
+
+    private AccessTokenResponse requestToken(String postBody) {
+        var request = HttpRequest.newBuilder()
+                .uri(openIDConfig.tokenUri())
+                .header("Content-Type", "application/x-www-form-urlencoded")
+                .header("Accept", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(postBody))
+                .build();
+
+        HttpResponse<String> resp;
+        try {
+            resp = CLIENT.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (IOException | InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        return Launcher.gsonManager.gson.fromJson(resp.body(), AccessTokenResponse.class);
+    }
+
+    private static KeyLocator loadKeyLocator(OpenIDConfig openIDConfig) {
+        var request = HttpRequest.newBuilder(openIDConfig.jwksUri()).GET().build();
+        HttpResponse<String> response;
+        try {
+            response = CLIENT.send(request, HttpResponse.BodyHandlers.ofString());
+        } catch (IOException | InterruptedException e) {
+            throw new RuntimeException(e);
+        }
+        var jwks = Jwks.setParser().build().parse(response.body());
+        return new KeyLocator(jwks);
+    }
+
+    private static class KeyLocator extends LocatorAdapter<Key> {
+        private final Map<String, Key> keys;
+
+        public KeyLocator(JwkSet jwks) {
+            this.keys = jwks.getKeys().stream().collect(
+                    Collectors.toMap(jwk -> String.valueOf(jwk.get("kid")), Jwk::toKey));
+        }
+
+        @Override
+        protected Key locate(JweHeader header) {
+            return super.locate(header);
+        }
+
+        @Override
+        protected Key locate(JwsHeader header) {
+            return keys.get(header.getKeyId());
+        }
+
+        @Override
+        protected Key doLocate(Header header) {
+            return super.doLocate(header);
+        }
+    }
+
+    record OpenIDUserSession(User user, String token, long expiresIn) implements UserSession {
+        @Override
+        public String getID() {
+            return user.getUsername();
+        }
+
+        @Override
+        public User getUser() {
+            return user;
+        }
+
+        @Override
+        public String getMinecraftAccessToken() {
+            return token;
+        }
+
+        @Override
+        public long getExpireIn() {
+            return expiresIn;
+        }
+    }
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/OpenIDConfig.java

@@ -0,0 +1,9 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import java.net.URI;
+
+public record OpenIDConfig(URI tokenUri, String authorizationEndpoint, String clientId, String clientSecret,
+                           String redirectUri, URI jwksUri, String scopes, ClaimExtractorConfig extractorConfig) {
+
+    public record ClaimExtractorConfig(String usernameClaim, String uuidClaim) {}
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/QueryBuilder.java

@@ -0,0 +1,59 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
+/**
+ * @author Xakep_SDK
+ */
+public class QueryBuilder {
+    private final String uri;
+    private final StringBuilder query = new StringBuilder();
+
+    public QueryBuilder(String uri) {
+        this.uri = uri;
+    }
+
+    public static QueryBuilder get(String uri) {
+        Objects.requireNonNull(uri, "uri");
+        if (uri.endsWith("/")) {
+            uri = uri.substring(0, uri.length() - 1);
+        }
+        return new QueryBuilder(uri);
+    }
+
+    public static QueryBuilder post() {
+        return new QueryBuilder(null);
+    }
+
+    public QueryBuilder addQuery(String key, String value) {
+        if (!query.isEmpty()) {
+            query.append('&');
+        }
+        query.append(URLEncoder.encode(key, StandardCharsets.UTF_8))
+                .append('=')
+                .append(URLEncoder.encode(value, StandardCharsets.UTF_8));
+        return this;
+    }
+
+    public String toUriString() {
+        if (uri != null) {
+            if (query. isEmpty()) {
+                return uri;
+            }
+            return uri + '?' + query;
+        }
+        return toQueryString();
+    }
+
+    public String toQueryString() {
+        return query.toString();
+    }
+
+    @Override
+    public String toString() {
+        return toUriString();
+    }
+}
+

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/SQLServerSessionStore.java

@@ -0,0 +1,99 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import pro.gravit.launchserver.auth.SQLSourceConfig;
+import pro.gravit.utils.helper.LogHelper;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.sql.SQLException;
+import java.util.UUID;
+
+public class SQLServerSessionStore implements ServerSessionStore {
+    private static final String CREATE_TABLE = """
+            create table if not exists `gravit_server_session` (
+              id int auto_increment,
+              uuid varchar(36),
+              username varchar(255),
+              server_id varchar(41),
+              primary key (id),
+              unique (uuid),
+              unique (username)
+            );
+            """;
+    private static final String DELETE_SERVER_ID = """
+            delete from `gravit_server_session` where uuid = ?
+            """;
+    private static final String INSERT_SERVER_ID = """
+            insert into `gravit_server_session` (uuid, username, server_id) values (?, ?, ?)
+            """;
+    private static final String SELECT_SERVER_ID_BY_USERNAME = """
+            select server_id from `gravit_server_session` where username = ?
+            """;
+
+    private final SQLSourceConfig sqlSourceConfig;
+
+    public SQLServerSessionStore(SQLSourceConfig sqlSourceConfig) {
+        this.sqlSourceConfig = sqlSourceConfig;
+    }
+
+    @Override
+    public boolean joinServer(UUID uuid, String username, String serverId) {
+        try (var connection = sqlSourceConfig.getConnection()) {
+            connection.setAutoCommit(false);
+            var savepoint = connection.setSavepoint();
+            try (var deleteServerIdStmt = connection.prepareStatement(DELETE_SERVER_ID);
+                 var insertServerIdStmt = connection.prepareStatement(INSERT_SERVER_ID)) {
+                deleteServerIdStmt.setString(1, uuid.toString());
+                deleteServerIdStmt.execute();
+                insertServerIdStmt.setString(1, uuid.toString());
+                insertServerIdStmt.setString(2, username);
+                insertServerIdStmt.setString(3, serverId);
+                insertServerIdStmt.execute();
+                connection.commit();
+                return true;
+            } catch (Exception e) {
+                connection.rollback(savepoint);
+                throw e;
+            }
+        } catch (SQLException e) {
+            LogHelper.debug("Can't join server. Username: %s".formatted(username));
+            LogHelper.error(e);
+        }
+
+        return false;
+    }
+
+    @Override
+    public String getServerIdByUsername(String username) {
+        try (var connection = sqlSourceConfig.getConnection();
+             var selectServerId = connection.prepareStatement(SELECT_SERVER_ID_BY_USERNAME)) {
+            selectServerId.setString(1, username);
+            try (var rs = selectServerId.executeQuery()) {
+                if (!rs.next()) {
+                    return null;
+                }
+                return rs.getString("server_id");
+            }
+        } catch (SQLException e) {
+            LogHelper.debug("Can't find server id by username. Username: %s".formatted(username));
+            LogHelper.error(e);
+        }
+        return null;
+    }
+
+    public void init() {
+        try (var connection = sqlSourceConfig.getConnection()) {
+            connection.setAutoCommit(false);
+            var savepoint = connection.setSavepoint();
+            try (var createTableStmt = connection.prepareStatement(CREATE_TABLE)) {
+                createTableStmt.execute();
+                connection.commit();
+            } catch (Exception e) {
+                connection.rollback(savepoint);
+                throw e;
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/SQLUserStore.java

@@ -0,0 +1,124 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import pro.gravit.launcher.ClientPermissions;
+import pro.gravit.launchserver.auth.HikariSQLSourceConfig;
+import pro.gravit.launchserver.auth.core.User;
+import pro.gravit.utils.helper.LogHelper;
+
+import java.sql.SQLException;
+import java.util.UUID;
+
+public class SQLUserStore implements UserStore {
+    private static final String CREATE_USER_TABLE = """
+            create table if not exists `gravit_user` (
+              id int auto_increment,
+              uuid varchar(36),
+              username varchar(255),
+              primary key (id),
+              unique (uuid),
+              unique (username)
+            )
+            """;
+    private static final String INSERT_USER = """
+            insert into `gravit_user` (uuid, username) values (?, ?)
+            """;
+    private static final String DELETE_USER_BY_NAME = """
+            delete `gravit_user` where username = ?
+            """;
+    private static final String SELECT_USER_BY_NAME = """
+            select uuid, username from `gravit_user` where username = ?
+            """;
+    private static final String SELECT_USER_BY_UUID = """
+            select uuid, username from `gravit_user` where uuid = ?
+            """;
+
+    private final HikariSQLSourceConfig sqlSourceConfig;
+
+    public SQLUserStore(HikariSQLSourceConfig sqlSourceConfig) {
+        this.sqlSourceConfig = sqlSourceConfig;
+    }
+
+    @Override
+    public User getByUsername(String username) {
+        try (var connection = sqlSourceConfig.getConnection();
+             var selectUserStmt = connection.prepareStatement(SELECT_USER_BY_NAME)) {
+            selectUserStmt.setString(1, username);
+            try (var rs = selectUserStmt.executeQuery()) {
+                if (!rs.next()) {
+                    LogHelper.debug("User not found, username: %s".formatted(username));
+                    return null;
+                }
+                return new UserEntity(rs.getString("username"),
+                        UUID.fromString(rs.getString("uuid")),
+                        new ClientPermissions());
+            }
+        } catch (SQLException e) {
+            LogHelper.error(e);
+        }
+
+        return null;
+    }
+
+    @Override
+    public User getUserByUUID(UUID uuid) {
+        try (var connection = sqlSourceConfig.getConnection();
+             var selectUserStmt = connection.prepareStatement(SELECT_USER_BY_UUID)) {
+            selectUserStmt.setString(1, uuid.toString());
+            try (var rs = selectUserStmt.executeQuery()) {
+                if (!rs.next()) {
+                    LogHelper.debug("User not found, UUID: %s".formatted(uuid));
+                    return null;
+                }
+                return new UserEntity(rs.getString("username"),
+                        UUID.fromString(rs.getString("uuid")),
+                        new ClientPermissions());
+            }
+        } catch (SQLException e) {
+            LogHelper.error(e);
+        }
+
+        return null;
+    }
+
+    @Override
+    public void createOrUpdateUser(User user) {
+        try (var connection = sqlSourceConfig.getConnection()) {
+            connection.setAutoCommit(false);
+            var savepoint = connection.setSavepoint();
+            try (var deleteUserStmt = connection.prepareStatement(DELETE_USER_BY_NAME);
+                 var insertUserStmt = connection.prepareStatement(INSERT_USER)) {
+                deleteUserStmt.setString(1, user.getUsername());
+                deleteUserStmt.execute();
+                insertUserStmt.setString(1, user.getUUID().toString());
+                insertUserStmt.setString(2, user.getUsername());
+                insertUserStmt.execute();
+                connection.commit();
+                LogHelper.debug("User saved. UUID: %s, username: %s".formatted(user.getUUID(), user.getUsername()));
+            } catch (Exception e) {
+                connection.rollback(savepoint);
+                throw e;
+            }
+        } catch (SQLException e) {
+            LogHelper.debug("Failed to save user");
+            LogHelper.error(e);
+            throw new RuntimeException("Failed to save user", e);
+        }
+    }
+
+    public void init() {
+        try (var connection = sqlSourceConfig.getConnection()) {
+            connection.setAutoCommit(false);
+            var savepoint = connection.setSavepoint();
+            try (var createUserTableStmt = connection.prepareStatement(CREATE_USER_TABLE)) {
+                createUserTableStmt.execute();
+                connection.commit();
+            } catch (Exception e) {
+                connection.rollback(savepoint);
+                throw e;
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/ServerSessionStore.java

@@ -0,0 +1,8 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import java.util.UUID;
+
+public interface ServerSessionStore {
+    boolean joinServer(UUID uuid, String username, String serverId);
+    String getServerIdByUsername(String username);
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/TokenResponse.java

@@ -0,0 +1,5 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+public record TokenResponse(String accessToken, long accessTokenExpiresIn,
+                            String refreshToken, long refreshTokenExpiresIn) {
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/UserEntity.java

@@ -0,0 +1,23 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import pro.gravit.launcher.ClientPermissions;
+import pro.gravit.launchserver.auth.core.User;
+
+import java.util.UUID;
+
+record UserEntity(String username, UUID uuid, ClientPermissions permissions) implements User {
+    @Override
+    public String getUsername() {
+        return username;
+    }
+
+    @Override
+    public UUID getUUID() {
+        return uuid;
+    }
+
+    @Override
+    public ClientPermissions getPermissions() {
+        return permissions;
+    }
+}

LaunchServer/src/main/java/pro/gravit/launchserver/auth/core/openid/UserStore.java

@@ -0,0 +1,13 @@
+package pro.gravit.launchserver.auth.core.openid;
+
+import pro.gravit.launchserver.auth.core.User;
+
+import java.util.UUID;
+
+public interface UserStore {
+    User getByUsername(String username);
+
+    User getUserByUUID(UUID uuid);
+
+    void createOrUpdateUser(User user);
+}

props.gradle

@@ -14,6 +14,7 @@
     verLog4j = '2.20.0'
     verMySQLConn = '8.3.0'
     verPostgreSQLConn = '42.7.1'
+    verH2Conn = '2.2.224'
     verProguard = '7.4.1'
     verLaunch4j = '3.50'
 }