If you are using Oracle JDK you may need to install strong encryption.
http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html
Hi,I have wildfly 10 installed using nginx as https proxy server [1, standalone-full.xml]. Works great when using weak ciphers in nginx. In that case keycloak can connect back to the app after authentication (redirect SSL). When using strong ciphers in nginx [2] is fails the ssl handshake [4]. JCE seems enabled since the deployed app reports 2016-04-13 21:41:33,304 INFO [stdout] (ServerService Thread Pool -- 83) max allowed keylength = 2147483647My question is: does keycloak use a limited set of ciphers? SNI works fine according to the log. I was digging in the code, but could not find something obvious [5]Best regards, Jazz[1] wildfly standalone-full.xml<subsystem xmlns="urn:jboss:domain:undertow:3.0"> <buffer-cache name="default"/> <server name="default-server"> <http-listener name="default" proxy-address-forwarding="true" socket-binding="http" redirect-socket="proxy-https"/>
[... snip ...]<socket-binding-group name="standard-sockets" default-interface="public" port-offset="${jboss.socket.binding.port-offset:0}"><socket-binding name="management-http" interface="management" port="${jboss.management.http.port:9990}"/><socket-binding name="management-https" interface="management" port="${jboss.management.https.port:9993}"/><socket-binding name="http" port="${jboss.http.port:8080}"/><socket-binding name="https" port="${jboss.https.port:8444}"/><socket-binding name="proxy-https" port="443"/>[2] nginx ssl.confssl_protocols TLSv1 TLSv1.1 TLSv1.2;ssl_prefer_server_ciphers on;ssl_session_timeout 5m;ssl_ciphers ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256;[3] wildfly ssl debug enabled in /etc/systemd/system/wildfly.service[4]2016-04-13 21:41:46,495 INFO [stdout] (default task-7) default task-7, setSoTimeout(0) called2016-04-13 21:41:46,498 INFO [stdout] (default task-7) Allow unsafe renegotiation: false2016-04-13 21:41:46,500 INFO [stdout] (default task-7) Allow legacy hello messages: true2016-04-13 21:41:46,502 INFO [stdout] (default task-7) Is initial handshake: true2016-04-13 21:41:46,503 INFO [stdout] (default task-7) Is secure renegotiation: false2016-04-13 21:41:46,505 INFO [stdout] (default task-7) Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv12016-04-13 21:41:46,506 INFO [stdout] (default task-7) Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv12016-04-13 21:41:46,508 INFO [stdout] (default task-7) Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv12016-04-13 21:41:46,509 INFO [stdout] (default task-7) Ignoring unsupported cipher suite: TLS_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.12016-04-13 21:41:46,511 INFO [stdout] (default task-7) Ignoring unsupported cipher suite: TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 for TLSv1.12016-04-13 21:41:46,512 INFO [stdout] (default task-7) Ignoring unsupported cipher suite: TLS_DHE_DSS_WITH_AES_256_CBC_SHA256 for TLSv1.12016-04-13 21:41:46,514 INFO [stdout] (default task-7) %% No cached client session2016-04-13 21:41:46,518 INFO [stdout] (default task-7) *** ClientHello, TLSv1.22016-04-13 21:41:46,522 INFO [stdout] (default task-7) RandomCookie: GMT: 1460510714 bytes = { 151, 73, 204, 252, 103, 130, 99, 194, 229, 121, 137, 218, 8, 134, 230, 194, 64, 147, 182, 180, 12, 171, 41, 74, 46, 186, 180, 88 }2016-04-13 21:41:46,523 INFO [stdout] (default task-7) Session ID: {}2016-04-13 21:41:46,525 INFO [stdout] (default task-7) Cipher Suites: [TLS_RSA_WITH_AES_256_CBC_SHA256, TLS_DHE_RSA_WITH_AES_256_CBC_SHA256, TLS_DHE_DSS_WITH_AES_256_CBC_SHA256, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, TLS_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_RSA_WITH_AES_128_CBC_SHA256, TLS_DHE_DSS_WITH_AES_128_CBC_SHA256, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_RSA_WITH_AES_256_GCM_SHA384, TLS_DHE_DSS_WITH_AES_256_GCM_SHA384, TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_RSA_WITH_AES_128_GCM_SHA256, TLS_DHE_DSS_WITH_AES_128_GCM_SHA256, SSL_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]2016-04-13 21:41:46,526 INFO [stdout] (default task-7) Compression Methods: { 0 }2016-04-13 21:41:46,527 INFO [stdout] (default task-7) Extension signature_algorithms, signature_algorithms: SHA512withECDSA, SHA512withRSA, SHA384withECDSA, SHA384withRSA, SHA256withECDSA, SHA256withRSA, SHA224withECDSA, SHA224withRSA, SHA1withECDSA, SHA1withRSA, SHA1withDSA2016-04-13 21:41:46,529 INFO [stdout] (default task-7) Extension server_name, server_name: [type=host_name (0), value=keycloak.example.com]2016-04-13 21:41:46,530 INFO [stdout] (default task-7) ***2016-04-13 21:41:46,531 INFO [stdout] (default task-7) default task-7, WRITE: TLSv1.2 Handshake, length = 1382016-04-13 21:41:46,533 INFO [stdout] (default task-7) default task-7, READ: TLSv1.2 Alert, length = 22016-04-13 21:41:46,534 INFO [stdout] (default task-7) default task-7, RECV TLSv1.2 ALERT: fatal, handshake_failure2016-04-13 21:41:46,535 INFO [stdout] (default task-7) default task-7, called closeSocket()2016-04-13 21:41:46,536 INFO [stdout] (default task-7) default task-7, handling exception: javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure2016-04-13 21:41:46,537 INFO [stdout] (default task-7) default task-7, called close()2016-04-13 21:41:46,538 INFO [stdout] (default task-7) default task-7, called closeInternal(true)2016-04-13 21:41:46,539 ERROR [org.keycloak.adapters.OAuthRequestAuthenticator] (default task-7) failed to turn code into token: javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failureat sun.security.ssl.Alerts.getSSLException(Alerts.java:192)at sun.security.ssl.Alerts.getSSLException(Alerts.java:154)at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:2023)at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1125)at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:543)at org.keycloak.adapters.SniSSLSocketFactory.connectSocket(SniSSLSocketFactory.java:109)at org.apache.http.conn.ssl.SSLSocketFactory.connectSocket(SSLSocketFactory.java:409)at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144)at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:131)at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:882)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.adapters.ServerRequest.invokeAccessCodeToToken(ServerRequest.java:107)at org.keycloak.adapters.OAuthRequestAuthenticator.resolveCode(OAuthRequestAuthenticator.java:314)at org.keycloak.adapters.OAuthRequestAuthenticator.authenticate(OAuthRequestAuthenticator.java:260)at org.keycloak.adapters.RequestAuthenticator.authenticate(RequestAuthenticator.java:112)at org.keycloak.adapters.undertow.AbstractUndertowKeycloakAuthMech.keycloakAuthenticate(AbstractUndertowKeycloakAuthMech.java:110)at org.keycloak.adapters.undertow.ServletKeycloakAuthMech.authenticate(ServletKeycloakAuthMech.java:92)at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:233)at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.transition(SecurityContextImpl.java:250)at io.undertow.security.impl.SecurityContextImpl$AuthAttempter.access$100(SecurityContextImpl.java:219)at io.undertow.security.impl.SecurityContextImpl.attemptAuthentication(SecurityContextImpl.java:121)at io.undertow.security.impl.SecurityContextImpl.authTransition(SecurityContextImpl.java:96)at io.undertow.security.impl.SecurityContextImpl.authenticate(SecurityContextImpl.java:89)at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:55)at io.undertow.server.handlers.DisableCacheHandler.handleRequest(DisableCacheHandler.java:33)at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)at io.undertow.security.handlers.AuthenticationConstraintHandler.handleRequest(AuthenticationConstraintHandler.java:51)at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)at io.undertow.servlet.handlers.security.ServletSecurityConstraintHandler.handleRequest(ServletSecurityConstraintHandler.java:56)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.keycloak.adapters.undertow.ServletPreAuthActionsHandler.handleRequest(ServletPreAuthActionsHandler.java:69)at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)at java.lang.Thread.run(Thread.java:745)