PH56076: SAML WEB SSO MIGHT 'FAIL WITH NO PRINCIPAL IN TRUST ASSOCIATION' ERROR

APAR status

• Closed as program error.

Error description

• When an application is protected by SAML Web SSO and the
  identity for the user in the SAML Assertion that is received
  from the IdP should come from an attribute, if there is no
  Subject/NameID element in the Assertion, the login fails with a
  "com.ibm.websphere.security.WebTrustAssociationFailedException:
  No principal in Trust Association Result" error.  You can find
  an FFDC similar to the following:
  
  [7/26/23 12:05:33:711 EDT]     FFDC Exception:com.ibm.websphere
  .security.WebTrustAssociationFailedExceptionSourceId:com.ibm.ws.
  eptor.invokeTAIbeforeSSOProbeId:649
  com.ibm.websphere.security.WebTrustAssociationFailedException:
  No principal in Trust Association Result
  	at com.ibm.ws.security.web.saml.ACSTrustAssociationInterceptor
  .createResult(ACSTrustAssociationInterceptor.java:1108)
  
  This issue only happens when the sso_(id).sp.idMap property is
  set to idAssertion (the default value).
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  IBM WebSphere Application Server users of   *
  *                  SAML                                        *
  *                  Web SSO                                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: "No principal in Trust Association      *
  *                      Result" is emitted from SAML Web SSO    *
  *                      when                                    *
  *                      user name is in an attribute.           *
  ****************************************************************
  * RECOMMENDATION:  Install a fix pack or interim fix that      *
  *                  contains this APAR.                         *
  ****************************************************************
  No principal in Trust Association Result
  at com.ibm.ws.security.web.saml.ACSTrustAssociationInterceptor
  .createResult(ACSTrustAssociationInterceptor.java:1108)
  is emitted from the SAML Web SSO TAI under the following
  conditions:
  * The identity for the user is obtained from a SAML
  attribribute.
  * sso_(id).sp.idMap=idAssertion
  * There is no Subject/NameID element in the Assertion.
  

Problem conclusion

• The SAML Web SSO TAI is updated to properly obtain the user
  name from a SAML attribute.
  
  The fix for this APAR is targeted for inclusion in fix packs
  8.5.5.25 and 9.0.5.19. For more information, see 'Recommended
  Updates for WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels