Grails 3 with SAML - authentication failure - grails

Question

I have created a Grails (v3.3.6) web app using the
Grails Spring Security SAML Plugin (v3.3.0).
Unfortunately, I am having trouble getting it
configured correctly. This is for a project called 'coworkers', so you
will see that name referenced in various places (below). We are using
PingFederate for our SAML authentication.
Problem: The authentication seems to working on the PingFederate side, but
then the browser is being sent into an infinite loop, going back and forth between my app and PingFederate (UPDATE: the infinite loop has
been fixed, but the source of the problem remains). Logs indicate a MetadataProviderException (see the end of the stacktrace below).
Any help is much appreciated!
Here is part of my application.yml config file:
---
grails:
plugin:
springsecurity:
saml:
active: true # false does not work as of saml plugin v3.3.0
afterLoginUrl: '/'
afterLogoutUrl: '/'
responseSkew: 300
signatureAlgorithm: 'rsa-sha256'
digestAlgorithm: 'sha256'
userGroupAttribute: 'roles'
autoCreate:
active: false # If you want the plugin to generate users in the DB as they are authenticated via SAML
key: 'id'
assignAuthorities: false # If you want the plugin to assign the authorities that come from the SAML message
metadata:
defaultIdp: 'fed.saml2' # 'coworkers' # #see https://github.com/jeffwils/grails-spring-security-saml/issues/34#issuecomment-396524285
url: '/saml/metadata'
providers:
ping: 'security/idp.xml'
sp:
file: 'security/sp.xml'
defaults:
local: false
entityId: 'coworkers'
alias: 'coworkers'
securityProfile: 'metaiop' # 'pkix' or 'metaiop'
signingKey: 'coworkers'
encryptionKey: 'coworkers'
tlsKey: 'coworkers'
requireArtifactResolveSigned: false
requireLogoutRequestSigned: false
requireLogoutResponseSigned: false
keyManager:
storeFile: 'classpath:security/mykeystore.jks'
storePass: 'mypassword'
passwords:
coworkers: 'mypassword'
defaultKey: ''
Here is my sp.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<md:EntityDescriptor entityID="coworkers" xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata">
<md:SPSSODescriptor AuthnRequestsSigned="true" WantAssertionsSigned="true" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
<md:Extensions>
<idpdisco:DiscoveryResponse xmlns:idpdisco="urn:oasis:names:tc:SAML:profiles:SSO:idp-discovery-protocol" Binding="urn:oasis:names:tc:SAML:profiles:SSO:idp-discovery-protocol" Location="http://myserver/login/auth/alias/coworkers?disco=false"/>
</md:Extensions>
<md:KeyDescriptor use="signing">
<ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:X509Data>
<ds:X509Certificate>CERTIFICATEREMOVED</ds:X509Certificate>
</ds:X509Data>
</ds:KeyInfo>
</md:KeyDescriptor>
<md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="http://myserver/saml/SingleLogout/alias/coworkers"/>
<md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="http://myserver/saml/SingleLogout/alias/coworkers"/>
<md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:SOAP" Location="http://myserver/saml/SingleLogout/alias/coworkers"/>
<md:NameIDFormat>urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress</md:NameIDFormat>
<md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</md:NameIDFormat>
<md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:persistent</md:NameIDFormat>
<md:NameIDFormat>urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified</md:NameIDFormat>
<md:NameIDFormat>urn:oasis:names:tc:SAML:1.1:nameid-format:X509SubjectName</md:NameIDFormat>
<md:AssertionConsumerService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="http://myserver/saml/SSO/alias/coworkers" index="0" isDefault="true"/>
<md:AssertionConsumerService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Artifact" Location="http://myserver/saml/SSO/alias/coworkers" index="1" isDefault="false"/>
<md:AssertionConsumerService Binding="urn:oasis:names:tc:SAML:2.0:bindings:PAOS" Location="http://myserver/saml/SSO/alias/coworkers" index="2" isDefault="false"/>
</md:SPSSODescriptor>
</md:EntityDescriptor>
Here is my idp.xml file:
<?xml version="1.0"?>
<md:EntityDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" ID="byhfqDHEyvF6TnZ1-nhQEyP0.kQ" cacheDuration="PT1440M" entityID="fed.saml2">
<md:IDPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol" WantAuthnRequestsSigned="true">
<md:KeyDescriptor use="signing">
<ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
<ds:X509Data>
<ds:X509Certificate>CERTIFICATEREMOVED</ds:X509Certificate>
</ds:X509Data>
</ds:KeyInfo>
</md:KeyDescriptor>
<md:NameIDFormat>urn:oasis:names:tc:SAML:1.1:nameid-format:unspecified</md:NameIDFormat>
<md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://fed/idp/SSO.saml2"/>
<md:SingleSignOnService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect" Location="https://fed/idp/SSO.saml2"/>
</md:IDPSSODescriptor>
</md:EntityDescriptor>
Here is the stacktrace from the logs:
2018-07-13 14:29:00.184 [] DEBUG --- [p-nio-80-exec-3] o.s.security.saml.SAMLProcessingFilter : Authentication request failed: org.springframework.security.authentication.AuthenticationServiceException: Error determining metadata contracts
org.springframework.security.authentication.AuthenticationServiceException: Error determining metadata contracts
at org.springframework.security.saml.SAMLProcessingFilter.attemptAuthentication(SAMLProcessingFilter.java:94)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.saml.metadata.MetadataDisplayFilter.doFilter(MetadataDisplayFilter.java:84)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.saml.SAMLEntryPoint.doFilter(SAMLEntryPoint.java:103)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at grails.plugin.springsecurity.web.SecurityRequestHolderFilter.doFilter(SecurityRequestHolderFilter.groovy:58)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.grails.web.servlet.mvc.GrailsWebRequestFilter.doFilterInternal(GrailsWebRequestFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.grails.web.filters.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:67)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.opensaml.saml2.metadata.provider.MetadataProviderException: No local entity found for alias coworkers, verify your configuration.
at org.springframework.security.saml.context.SAMLContextProviderImpl.populateLocalEntityId(SAMLContextProviderImpl.java:279)
at org.springframework.security.saml.context.SAMLContextProviderImpl.getLocalEntity(SAMLContextProviderImpl.java:106)
at org.springframework.security.saml.SAMLProcessingFilter.attemptAuthentication(SAMLProcessingFilter.java:79)
... 50 common frames omitted

Answer 1

I can see that in application.yml you have mentioned "entityId" as "https://coworkers/", but in your SP metadata file the entityId is "http://myserver/coworkers". Make both of them same and try again.

Answer 2

After lots of experimenting, I finally just tried setting the saml.metadata.sp.defaults.local to true. This seems to have fixed my problem! I obviously misunderstood the description of this setting. #Agam, I really appreciated your assistance.