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SSO fails with exception while validating SAML response



Using SSO and SAML 2.0 with PING identity, and trying to log in through SSO, it fails with an exception in logs.

Error Messages Caught Exception while validating SAML2 Authentication response protocol : For input string: ""
at com.pega.pegarules.integration.engine.internal.sso.saml.SAMLv2ResponseProtocolValidator.validate(
at com.pega.pegarules.integration.engine.internal.util.PRSAMLv2Utils.validateResponse(
at com.pega.pegarules.integration.engine.internal.util.PRSAMLv2Utils.processAuthenticationResponse(

Steps to Reproduce

Log in with SSO using SAML 2.0 with PING identity.

Root Cause

A third-party product issue: Weblogic 12.1.3 xml processing JARs are incompatible with opensaml 2.6.1.


Perform the following local-change: 

Use the custom xml-apis-1.0.b2.jar, xercesImpl-2.9.1.jar (downloaded from the associated open source project) that are compatible with opensaml 2.6.1.

1. Add the following segments to the weblogic-application.xml (normally under
archives\prpc\weblogic\ear\app\META-INF in the Pega official media).

2. Redeploy the Pega EAR as instructed by the official installation guide.
3. Restart the server instance.

Published January 31, 2016 - Updated October 8, 2020

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