Hello,

I want to use SAML2 Delegated Authentication as explained in this
documentation :
https://fawnoos.com/2023/10/04/cas66-delegate-authn-saml2-idp/

Unfortunately, I'm encountering an error upon restarting the Tomcat service:
-----------------------------------------------------------------------------------------------------------
[2024-05-01 19:44:46] [info] #033[1;31m2024-05-01 19:44:46,585 ERROR
[net.shibboleth.utilities.java.support.xml.BasicParserPool] - <XML Parsing
Error>#033[m
[2024-05-01 19:44:46] [info] #033[1;31m2024-05-01 19:44:46,587 ERROR
[org.opensaml.saml.metadata.resolver.impl.AbstractReloadingMetadataResolver]
- <Metadata Resolver FilesystemMetadataResolver
org.opensaml.saml.metadata.resolver.impl.FilesystemMetadataResolver: Unable
to unmarshall metadata:
net.shibboleth.utilities.java.support.xml.XMLParserException: Unable to
parse inputstream, it contained invalid XML>#033[m
[2024-05-01 19:44:46] [info] #033[1;31m2024-05-01 19:44:46,588 ERROR
[org.opensaml.saml.metadata.resolver.impl.AbstractReloadingMetadataResolver]
- <Metadata Resolver FilesystemMetadataResolver
org.opensaml.saml.metadata.resolver.impl.FilesystemMetadataResolver: Error
occurred while attempting to refresh metadata from
'/tmp/samlSpMetadata6083509884623035039.xml'>#033[m
[2024-05-01 19:44:46] [info]
net.shibboleth.utilities.java.support.resolver.ResolverException: Unable to
unmarshall metadata
...
[2024-05-01 19:44:46] [info] #033[1;31m2024-05-01 19:44:46,595 ERROR
[org.opensaml.saml.metadata.resolver.impl.AbstractMetadataResolver] -
<Metadata Resolver FilesystemMetadataResolver
org.opensaml.saml.metadata.resolver.impl.FilesystemMetadataResolver:
Metadata provider failed to properly initialize, fail-fast=true,
halting>#033[m
[2024-05-01 19:44:46] [info] #033[33m2024-05-01 19:44:46,598 WARN
[org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext]
- <Exception encountered during context initialization - cancelling refresh
attempt: org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name 'identityProviderDiscoveryFeedController'
defined in class path resource
[org/apereo/cas/config/SamlIdentityProviderDiscoveryConfiguration.class]:
Unsatisfied dependency expressed through method
'identityProviderDiscoveryFeedController' parameter 1; nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException: Error
creating bean with name 'identityProviderDiscoveryFeedService' defined in
class path resource
[org/apereo/cas/config/SamlIdentityProviderDiscoveryConfiguration.class]:
Unsatisfied dependency expressed through method
'identityProviderDiscoveryFeedService' parameter 1; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'samlIdentityProviderEntityParser' defined in class path
resource
[org/apereo/cas/config/SamlIdentityProviderDiscoveryConfiguration.class]:
Bean instantiation via factory method failed; nested exception is
org.springframework.beans.BeanInstantiationException: Failed to instantiate
[org.apereo.cas.util.spring.beans.BeanContainer]: Factory method
'samlIdentityProviderEntityParser' threw exception; nested exception is
org.pac4j.saml.exceptions.SAMLException: Unable to generate metadata for
service provider>#033[m
[2024-05-01 19:44:51] [info] #033[1;31m2024-05-01 19:44:51,752 ERROR
[org.springframework.boot.SpringApplication] - <Application run
failed>#033[m
[2024-05-01 19:44:51] [info]
org.springframework.beans.factory.UnsatisfiedDependencyException: Error
creating bean with name 'identityProviderDiscoveryFeedController' defined
in class path resource
[org/apereo/cas/config/SamlIdentityProviderDiscoveryConfiguration.class]:
Unsatisfied dependency expressed through method
'identityProviderDiscoveryFeedController' parameter 1; nested exception is
org.springframework.beans.factory.UnsatisfiedDependencyException: Error
creating bean with name 'identityProviderDiscoveryFeedService' defined in
class path resource
[org/apereo/cas/config/SamlIdentityProviderDiscoveryConfiguration.class]:
Unsatisfied dependency expressed through method
'identityProviderDiscoveryFeedService' parameter 1; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'samlIdentityProviderEntityParser' defined in class path
resource
[org/apereo/cas/config/SamlIdentityProviderDiscoveryConfiguration.class]:
Bean instantiation via factory method failed; nested exception is
org.springframework.beans.BeanInstantiationException: Failed to instantiate
[org.apereo.cas.util.spring.beans.BeanContainer]: Factory method
'samlIdentityProviderEntityParser' threw exception; nested exception is
org.pac4j.saml.exceptions.SAMLException: Unable to generate metadata for
service provider
...
[2024-05-01 19:44:51] [info] Caused by: org.xml.sax.SAXParseException:
Premature end of file.
-----------------------------------------------------------------------------------------------------------

I checked the XML file with an online parser, and there are no errors. I've
tried with several IDPs (Shibboleth or CAS) with both a URL and a local
file, but the error remains the same. . However, if I use a file or URL
that doesn't exist, the error is quite different. I'm using Tomcat 9, Java
11 (from debian 11 apt) and CAS 6.6.15.

cas.properties :
-----------------------------------------------------------------------------------------------------------
cas.authn.pac4j.saml[0].keystore-password=xxxxxxxxxxxxxxxxxxxxxxx
cas.authn.pac4j.saml[0].private-key-password=xxxxxxxxxxxxxxx
cas.authn.pac4j.saml[0].service-provider-entity-id=
https://cas.domain.fr/cas/sp
cas.authn.pac4j.saml[0].keystore-path=/etc/cas/config/samlKeystore.jks
cas.authn.pac4j.saml[0].identity-provider-metadata-path=
https://idp.domain.fr/idp/shibboleth
cas.authn.pac4j.saml[0].destination-binding=urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect
cas.authn.pac4j.saml[0].client-name=TEST1
-----------------------------------------------------------------------------------------------------------

Would anyone have an idea of the origin of my issue, please?

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