Using OpenShift generated certificates and client auth cause TLS errors ----------------------------------------------------------------------- Key: WFLY-11007 URL: https://issues.jboss.org/browse/WFLY-11007 Project: WildFly Issue Type: Bug Components: Security, Web (Undertow) Affects Versions: 13.0.0.Final Reporter: Sebastian Laskawiec Assignee: Stuart Douglas Priority: Major h2. Summary It seems that when using OpenShift generated certificates and client auth (with {{want-client-auth="true"}}) the TLS handshake fails with {{RECV TLSv1.2 ALERT: fatal, record_overflow}} message. h2. Explanation I'm using {{oc cluster up}} and deploying Keycloak (WF 13 based) on OpenShift local cluster using the (1) template. The service in the the template uses OpenShift generated certificates ({{"service.alpha.openshift.io/serving-cert-secret-name": "keycloak-x509-https-secret"}}). Both files are mounted in the Keycloak pod and translated into keystore and truststore (see the configuration after the transformation (2)). Once the pod is up and running, I'm issuing a {{curl}} command as shown in (3). {{curl}} fails saying that {{* error:1408F092:SSL routines:ssl3_get_record:data length too long}}. The server logs with TLS Handshake debugging turned on might be found here (4). As shown in the link, the server has written {{16384}} bytes. I also did a test with manually created certificates (5). The result might be found here (6). As shown in the link, we've written {{16050}} bytes instead of {{16384}} and the handshake was successful. h2. Possible solution Perhaps we should cut the list CAs transmitted by the server when asking for client auth when it exceeds certain number of bytes. It would be helpful to write a warn message too. Links: - (1) Keycloak OCP Template https://gist.github.com/slaskawi/57ed810a7109a02a9d884b61ce2e7f13 - (2) Transformed configuration https://gist.github.com/slaskawi/92aead6c519b867621129b640b4a3c88 - (3) curl command https://gist.github.com/slaskawi/3bc32b8e96c2499cb7b48c3c5cb28616 - (4) https://gist.github.com/slaskawi/b6477fe3cd65890c879cfe6f95359450#file-lo... - (5) Keycloak and OpenShift integration demo https://github.com/keycloak/openshift-integration/blob/master/install-key... - (6) https://gist.github.com/slaskawi/7fd87e1f2e6c4faf657d9e8289ed3392#file-lo...