Juan,

Cas will create IdP metadata and certificates if they do not exist (save them 
for future deploys). For your dev setup, you will have to add them to the 
directory before cas starts; either COPY into your container image or mount the 
volume when the container starts. If you use a traditional deployment (jenkins 
etc) let the tool install them.

Ray

On Wed, 2024-10-09 at 17:53 -0700, Juan Fernando Rivera wrote:
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Hi, reading your post I think the problem is that the files in "/etc/cas/saml" 
(idp-encryption.*, idp-signing.*) are created every time CAS is restarted. I 
know that in a production environment this won't be an issue, but right now it 
is.

Is there a way to prevent these files to recreating everytime my CAS container 
is restarted?

Thanks in advance.

On Monday, October 7, 2024 at 12:43:28 PM UTC-6 Ray Bon wrote:
Juan,

Can you clarify your description of the certificates and metadata?

Liferay will create SP metadata with encryption certificate (and maybe signing 
too); you will create IdP metadata (cas will do this if it does not exist) with 
signing and encryption certificates. You point cas config at the certificates 
that you (or cas) created. Liferay SP certificates should be different from 
your IdP certificates.

Ray

On Sun, 2024-10-06 at 14:53 -0700, Juan Fernando Rivera wrote:
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Hi, I'm following the guidelines of configuring a SAML service in CAS, but I'm 
having trouble connecting to Liferay portal.

In Liferay were created the certificates and imported in the idp-metadata file 
which was sent back to Liferay and imported. Everything runs fine, BUT after 
entering the credentials in CAS, this error (or similar) appears in Liferay 
logs:

2024-10-04 21:51:11.830 DEBUG 
[http-nio-0.0.0.0-9444-exec-4][ApacheSantuarioSignatureValidationProviderImpl:65]
 Validating signature with signature algorithm 
URI:http://www.w3.org/2001/04/xmldsig-more#rsa-sha256
2024-10-04 21:51:11.830 DEBUG 
[http-nio-0.0.0.0-9444-exec-4][ApacheSantuarioSignatureValidationProviderImpl:66]
 Validation credential key algorithm 'RSA', key instance class 
'sun.security.rsa.RSAPublicKeyImpl'
2024-10-04 21:51:11.831 WARN  [http-nio-0.0.0.0-9444-exec-4][XMLSignature:891] 
Signature verification failed.
2024-10-04 21:51:11.831 DEBUG 
[http-nio-0.0.0.0-9444-exec-4][ApacheSantuarioSignatureValidationProviderImpl:78]
 Signature cryptographic validation not successful
2024-10-04 21:51:11.831 DEBUG 
[http-nio-0.0.0.0-9444-exec-4][BaseSignatureTrustEngine:244] Signature 
validation using candidate validation credential failed
org.opensaml.xmlsec.signature.support.SignatureException: Signature 
cryptographic validation not successful
.....
2024-10-04 21:51:11.832 DEBUG 
[http-nio-0.0.0.0-9444-exec-4][ExplicitKeySignatureTrustEngine:124] Failed to 
verify signature using either KeyInfo-derived or directly trusted credentials
2024-10-04 21:51:11.833 DEBUG 
[http-nio-0.0.0.0-9444-exec-4][SAMLProtocolMessageXMLSignatureSecurityHandler:142]
 Message Handler:  Validation of protocol message signature failed for context 
issuer 'ENTITY_ID', message type: {urn:oasis:names:tc:SAML:2.0:protocol}Response
2024-10-04 21:51:11.833 DEBUG 
[http-nio-0.0.0.0-9444-exec-4][WebSsoProfileImpl:210] Validation of protocol 
message signature failed
.....

According to the Liferay admin, the main issue may come from CAS, because is 
not using the right key to generate the values in the SAML Response. Other 
reason may be encryption or signature.
I have tried both encryption and signature options in service.json file, but no 
avail, the errors are th same.
How can I verify this suspicions of Liferay admin? how can I force CAS to use a 
certain private key to generate the data in SAML response?

Thanks in advance.


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