Keycloak identity brokering (to Azure AD) blocked by corporate proxy on authorization_code exchange

7
votes

I have AzureAD as external OIDC provider registered at Keycloak. Keycloak redirects client authorization requests to AzureAD for providing the authorization. Keycloak is running on my workstation behind a corporate proxy, the corresponding Azure AD is hosted in the public internet. I'm able to connect to Azure AD with Postman from my local workstation.

enter image description here

The authorization via AzureAD works as expected (The user is prompted to put in her/his credentials and accept the consent). After successful authorization AzureAD responds with an authorization_code to the defined Keycloak return-url:

http://localhost:5000/auth/realms/lsp-api/broker/ms-azure-ad/endpoint?code=AQABAAIAAADX8GCi6Js6SK82TsD2Pb7rL__pDRDcKAqDqyTeTdzmbC9n3kcz5flc0q7zDRbK-WVLUpcUU65tWSh9C-opFiwtMZOACwGLQDgh4y4ScLW-dUGN7g3Ad3_aBqK-uHPgS3uKM1OlAIeSw3NSl1DMTKhH7SGQRGITP6ARIrCL9snqNRDUbHvhfKVlLMxmJTUk0bKDIT3PzM4nBSd1NwdXc9VZ9cCFnRMjlKfpRUx3guo-58tgSL5Vsaf8TvKg8B5TSYbiDzS49epFsU0Eg_PBs1JU4Q-8vOrN_wlV1zs1IUDYbUv8EdlMdqJkaT-nBTv-4Ab2Jf3X39u4m666kvcWmezGJ-NkjPqaOSK6eglWJfjW_z9-vHFQl6F9JxdCIlGbolyZyUpo0-a0LlnVVg2gyl1wJEOSnv5RvhmTZOqa1qWxZNsyG15JeQBkcK-J0XzWmn8CaeqzsJwFlNwkpzK_XaZW-KIsWayZ0Rz2HdDYh3Mre2I4uRmDyoQLiP60lYDaYowZZ11jSBy_87vFL2alK-5sGyUajs6kODfsoSlEGHhWJeHMiC2-jYm0gMNTQIvUMYpLJRpgKX6v3n-E3Q7ZlYD_VAWOnDZBCR5iaTsUOxuXN6CiC4p01N47c4QG4Y8A9lTbVXDvVcxSBz8H7uM5DfawFGUKpSCobI9V1XKnyw1R8UXTObqmEq8gA4jBzaRZb89qAnlZ6X-w39LbLWE7MUlL0Ok8LP-7omQlVei6AdEMfrIaHNIBUFimHLgKjiqcG2ogAA&state=FevrPXHHXkICQjFEYJ_3ZyvfZ2Y9E6iM5foCcOvk5C8.jXAAgdz4mnA.lsp-api&session_state=8cb0539a-b775-4de6-b334-5cb24caeb685

enter image description here

This response is sent with the status code 502, Bad Gateway. Furthermore the error-msg "Unexpected error when authenticating with Identity Provider" is displayed.

I already tried to send the returned authorization_code manually to the AzureAD /token endpoint and I received the access_token and the id_token back. So the problem seems to be the response-handling on the Keycloak-side.

Expected behavior would have been:

  1. AzureAD responds to Keycloak with the authorization_code
  2. Keycloak is able to exchange the authorization_code for an access_token (mb. in addition an id_token)

What does not work:

Keycloak is not able to exchange the authorization_code for an access_token, but throws the "Unexpected error when authenticating with Identity Provider" error-message.

Keycloak setup:

Keycloak Version: 4.1.0.Final

enter image description here

The AzureAD Reply-URL is set to http://localhost:5000/auth/realms/lsp-api/broker/ms-azure-ad/endpoint .

Edit

I did some more research and found out that this is probably a corporate proxy issue. The proxy is situated between Keycloak (running on my machines localhost) and AzureAD. So how do I set the proxy for Keycloaks Identity Brokering? The relevant Keycloak logs:

org.keycloak.broker.oidc.AbstractOAuth2IdentityProvider] (default task-122) Failed to make identity provider oauth callback: org.apache.http.conn.HttpHostConnectException: Connect to login.microsoftonline.com:443 [login.microsoftonline.com/40.112.64.25, login.microsoftonline.com/104.41.216.18, login.microsoftonline.com/104.41.216.16] failed: Connection refused: connect
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:158)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184)
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
    at org.keycloak.broker.provider.util.SimpleHttp.makeRequest(SimpleHttp.java:185)
    at org.keycloak.broker.provider.util.SimpleHttp.asResponse(SimpleHttp.java:154)
    at org.keycloak.broker.provider.util.SimpleHttp.asString(SimpleHttp.java:146)
    at org.keycloak.broker.oidc.AbstractOAuth2IdentityProvider$Endpoint.authResponse(AbstractOAuth2IdentityProvider.java:405)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:140)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:295)
    at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:249)
    at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:138)
    at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:107)
    at org.jboss.resteasy.core.ResourceLocatorInvoker.invokeOnTargetObject(ResourceLocatorInvoker.java:133)
    at org.jboss.resteasy.core.ResourceLocatorInvoker.invoke(ResourceLocatorInvoker.java:101)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:406)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:213)
    at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:228)
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
    at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
    at org.keycloak.services.filters.KeycloakSessionServletFilter.doFilter(KeycloakSessionServletFilter.java:90)
    at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)
    at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
    at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
    at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
    at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
    at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
    at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
    at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
    at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
    at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
    at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
    at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at org.wildfly.extension.undertow.deployment.GlobalRequestControllerHandler.handleRequest(GlobalRequestControllerHandler.java:68)
    at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
    at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:292)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$100(ServletInitialHandler.java:81)
    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:138)
    at io.undertow.servlet.handlers.ServletInitialHandler$2.call(ServletInitialHandler.java:135)
    at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:48)
    at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
    at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
    at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
    at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:272)
    at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
    at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:104)
    at io.undertow.server.Connectors.executeRootHandler(Connectors.java:326)
    at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:812)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.ConnectException: Connection refused: connect
    at java.net.TwoStacksPlainSocketImpl.socketConnect(Native Method)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:337)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:141)
    ... 74 more
2
proxyoauth-2.0azure-active-directoryopenid-connectkeycloak
Not related, answer maybe here: stackoverflow.com/a/51787942/3797368 Can You please provide example how are you mapping claims ? And how is your client in keycloak set ? I am trying to map groups from JWT to Keycloak Thanks – MUHAHA
In the Keycloak admin console you just have to go to your registered identity broker and create a new claims-mapper there. It is documented here: keycloak.org/docs/3.0/server_admin/topics/identity-broker/… – git-flo
have you resolved it? Can you please share How you have configured AzureAD as external OIDC provider at Keycloak – vishal munde
I was not able to solve the issue yet. You can follow the Keycloak doc on how to configure an identity broker: keycloak.org/docs/latest/server_admin/… – git-flo
I have the similar issue (login with google). I think it related to proxy. Did you have a solution now? – Kaman Wu

2 Answers

0
votes

This exception means that there is no service listening on the IP/port you are trying to connect to:

  1. You are trying to connect to the wrong IP/port.
  2. You have not started your server.
  3. Your server is not listening for connections.
  4. On Windows servers, the listen backlog queue is full.

You can try to replace the localhost with your IP address. Also do ensure there's no firewall blocking the connection.

0
votes

You should be able to set proxy for JVM like

-Dhttp.proxyHost=proxy.example.com -Dhttp.proxyPort=3128