From b1c0c9d40edcf1877698afb865f46c7f498ce7d7 Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <Jacek@jacekk.info>
Date: Thu, 27 Apr 2023 20:49:29 +0000
Subject: [PATCH] GitHub Actions: limit permissions of GITHUB_TOKEN

---
 src/main/java/org/keycloak/protocol/cas/endpoints/ValidateEndpoint.java |  183 ++-------------------------------------------
 1 files changed, 11 insertions(+), 172 deletions(-)

diff --git a/src/main/java/org/keycloak/protocol/cas/endpoints/ValidateEndpoint.java b/src/main/java/org/keycloak/protocol/cas/endpoints/ValidateEndpoint.java
index c250578..157142f 100644
--- a/src/main/java/org/keycloak/protocol/cas/endpoints/ValidateEndpoint.java
+++ b/src/main/java/org/keycloak/protocol/cas/endpoints/ValidateEndpoint.java
@@ -1,60 +1,30 @@
 package org.keycloak.protocol.cas.endpoints;
 
-import org.jboss.logging.Logger;
 import org.jboss.resteasy.annotations.cache.NoCache;
-import org.jboss.resteasy.spi.HttpRequest;
-import org.keycloak.common.ClientConnection;
-import org.keycloak.events.Details;
-import org.keycloak.events.Errors;
 import org.keycloak.events.EventBuilder;
 import org.keycloak.events.EventType;
-import org.keycloak.models.*;
+import org.keycloak.models.RealmModel;
 import org.keycloak.protocol.cas.CASLoginProtocol;
-import org.keycloak.protocol.cas.representations.CASErrorCode;
 import org.keycloak.protocol.cas.utils.CASValidationException;
-import org.keycloak.protocol.oidc.utils.RedirectUtils;
-import org.keycloak.services.managers.AuthenticationManager;
-import org.keycloak.services.managers.ClientSessionCode;
 
 import javax.ws.rs.GET;
-import javax.ws.rs.core.*;
-import java.lang.reflect.Method;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.MultivaluedMap;
+import javax.ws.rs.core.Response;
 
-public class ValidateEndpoint {
-    protected static final Logger logger = Logger.getLogger(ValidateEndpoint.class);
+public class ValidateEndpoint extends AbstractValidateEndpoint {
 
     private static final String RESPONSE_OK = "yes\n";
     private static final String RESPONSE_FAILED = "no\n";
 
-    @Context
-    protected KeycloakSession session;
-
-    @Context
-    protected ClientConnection clientConnection;
-
-    @Context
-    protected HttpRequest request;
-
-    @Context
-    protected HttpHeaders headers;
-
-    @Context
-    protected UriInfo uriInfo;
-
-    protected RealmModel realm;
-    protected EventBuilder event;
-    protected ClientModel client;
-    protected AuthenticatedClientSessionModel clientSession;
-
     public ValidateEndpoint(RealmModel realm, EventBuilder event) {
-        this.realm = realm;
-        this.event = event;
+        super(realm, event);
     }
 
     @GET
     @NoCache
     public Response build() {
-        MultivaluedMap<String, String> params = uriInfo.getQueryParameters();
+        MultivaluedMap<String, String> params = session.getContext().getUri().getQueryParameters();
         String service = params.getFirst(CASLoginProtocol.SERVICE_PARAM);
         String ticket = params.getFirst(CASLoginProtocol.TICKET_PARAM);
         boolean renew = params.containsKey(CASLoginProtocol.RENEW_PARAM);
@@ -76,145 +46,14 @@
     }
 
     protected Response successResponse() {
-        return Response.ok(RESPONSE_OK).type(MediaType.TEXT_PLAIN).build();
+        StringBuilder sb = new StringBuilder(RESPONSE_OK);
+        sb.append(clientSession.getUserSession().getUser().getUsername());
+        sb.append("\n");
+        return Response.ok(sb.toString()).type(MediaType.TEXT_PLAIN).build();
     }
 
     protected Response errorResponse(CASValidationException e) {
         return Response.status(e.getStatus()).entity(RESPONSE_FAILED).type(MediaType.TEXT_PLAIN).build();
     }
 
-    private void checkSsl() {
-        if (!uriInfo.getBaseUri().getScheme().equals("https") && realm.getSslRequired().isRequired(clientConnection)) {
-            throw new CASValidationException(CASErrorCode.INVALID_REQUEST, "HTTPS required", Response.Status.FORBIDDEN);
-        }
-    }
-
-    private void checkRealm() {
-        if (!realm.isEnabled()) {
-            throw new CASValidationException(CASErrorCode.INTERNAL_ERROR, "Realm not enabled", Response.Status.FORBIDDEN);
-        }
-    }
-
-    private void checkClient(String service) {
-        if (service == null) {
-            event.error(Errors.INVALID_REQUEST);
-            throw new CASValidationException(CASErrorCode.INVALID_REQUEST, "Missing parameter: " + CASLoginProtocol.SERVICE_PARAM, Response.Status.BAD_REQUEST);
-        }
-
-        client = realm.getClients().stream()
-                .filter(c -> CASLoginProtocol.LOGIN_PROTOCOL.equals(c.getProtocol()))
-                .filter(c -> RedirectUtils.verifyRedirectUri(uriInfo, service, realm, c) != null)
-                .findFirst().orElse(null);
-        if (client == null) {
-            event.error(Errors.CLIENT_NOT_FOUND);
-            throw new CASValidationException(CASErrorCode.INVALID_SERVICE, "Client not found", Response.Status.BAD_REQUEST);
-        }
-
-        if (!client.isEnabled()) {
-            event.error(Errors.CLIENT_DISABLED);
-            throw new CASValidationException(CASErrorCode.INVALID_SERVICE, "Client disabled", Response.Status.BAD_REQUEST);
-        }
-
-        event.client(client.getClientId());
-
-        session.getContext().setClient(client);
-    }
-
-    private void checkTicket(String ticket, boolean requireReauth) {
-        if (ticket == null) {
-            event.error(Errors.INVALID_CODE);
-            throw new CASValidationException(CASErrorCode.INVALID_REQUEST, "Missing parameter: " + CASLoginProtocol.TICKET_PARAM, Response.Status.BAD_REQUEST);
-        }
-        if (!ticket.startsWith(CASLoginProtocol.SERVICE_TICKET_PREFIX)) {
-            event.error(Errors.INVALID_CODE);
-            throw new CASValidationException(CASErrorCode.INVALID_TICKET_SPEC, "Malformed service ticket", Response.Status.BAD_REQUEST);
-        }
-
-        String code = ticket.substring(CASLoginProtocol.SERVICE_TICKET_PREFIX.length());
-
-        String[] parts = code.split("\\.");
-        if (parts.length == 4) {
-            event.detail(Details.CODE_ID, parts[2]);
-        }
-
-        ClientSessionCode.ParseResult<AuthenticatedClientSessionModel> parseResult;
-        try {
-            // Keycloak >3.4 branch: Parameter event was added to ClientSessionCode.parseResult
-            Method parseResultMethod = ClientSessionCode.class.getMethod("parseResult",
-                    String.class, KeycloakSession.class, RealmModel.class, EventBuilder.class, Class.class);
-            parseResult = (ClientSessionCode.ParseResult<AuthenticatedClientSessionModel>) parseResultMethod.invoke(
-                    null, code, session, realm, event, AuthenticatedClientSessionModel.class);
-        } catch (ReflectiveOperationException e) {
-            // Keycloak <=3.3 branch
-            parseResult = ClientSessionCode.parseResult(code, session, realm, AuthenticatedClientSessionModel.class);
-        }
-        if (parseResult.isAuthSessionNotFound() || parseResult.isIllegalHash()) {
-            event.error(Errors.INVALID_CODE);
-
-            // Attempt to use same code twice should invalidate existing clientSession
-            AuthenticatedClientSessionModel clientSession = parseResult.getClientSession();
-            if (clientSession != null) {
-                clientSession.setUserSession(null);
-            }
-
-            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Code not valid", Response.Status.BAD_REQUEST);
-        }
-
-        clientSession = parseResult.getClientSession();
-
-        try {
-            // Keycloak >3.4 branch: Method isExpiredToken was added
-            Method isExpiredToken = ClientSessionCode.ParseResult.class.getMethod("isExpiredToken");
-            if ((Boolean) isExpiredToken.invoke(parseResult)) {
-                event.error(Errors.EXPIRED_CODE);
-                throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Code is expired", Response.Status.BAD_REQUEST);
-            }
-        } catch (ReflectiveOperationException e) {
-            // Keycloak <=3.3 branch
-            if (!parseResult.getCode().isValid(AuthenticatedClientSessionModel.Action.CODE_TO_TOKEN.name(), ClientSessionCode.ActionType.CLIENT)) {
-                event.error(Errors.INVALID_CODE);
-                throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Code is expired", Response.Status.BAD_REQUEST);
-            }
-
-            parseResult.getCode().setAction(null);
-        }
-
-        clientSession.setNote(CASLoginProtocol.SESSION_SERVICE_TICKET, ticket);
-
-        if (requireReauth && AuthenticationManager.isSSOAuthentication(clientSession)) {
-            event.error(Errors.SESSION_EXPIRED);
-            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Interactive authentication was requested but not performed", Response.Status.BAD_REQUEST);
-        }
-
-        UserSessionModel userSession = clientSession.getUserSession();
-
-        if (userSession == null) {
-            event.error(Errors.USER_SESSION_NOT_FOUND);
-            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "User session not found", Response.Status.BAD_REQUEST);
-        }
-
-        UserModel user = userSession.getUser();
-        if (user == null) {
-            event.error(Errors.USER_NOT_FOUND);
-            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "User not found", Response.Status.BAD_REQUEST);
-        }
-        if (!user.isEnabled()) {
-            event.error(Errors.USER_DISABLED);
-            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "User disabled", Response.Status.BAD_REQUEST);
-        }
-
-        event.user(userSession.getUser());
-        event.session(userSession.getId());
-
-        if (!client.getClientId().equals(clientSession.getClient().getClientId())) {
-            event.error(Errors.INVALID_CODE);
-            throw new CASValidationException(CASErrorCode.INVALID_SERVICE, "Auth error", Response.Status.BAD_REQUEST);
-        }
-
-        if (!AuthenticationManager.isSessionValid(realm, userSession)) {
-            event.error(Errors.USER_SESSION_NOT_FOUND);
-            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Session not active", Response.Status.BAD_REQUEST);
-        }
-
-    }
 }

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