unable to verify message signature with supplied trust engine

[Peter Schober]

* Sam Jacob <skjacob at gmail.com> [2014-02-28 18:50]:
> 2014-02-28 10:31:46 ERROR OpenSAML.SecurityPolicyRule.XMLSigning [24]:
> unable to verify message signature with supplied trust engine
> 2014-02-28 10:31:46 WARN Shibboleth.SSO.SAML2 [24]: detected a problem with
> assertion: Message was signed, but signature could not be verified.

Second entry on: Shib wiki -> Troubleshoot -> SP Common Errors:
https://wiki.shibboleth.net/confluence/display/SHIB2/NativeSPTroubleshootingCommonErrors#NativeSPTroubleshootingCommonErrors-Messagewassigned,butsignaturecouldnotbeverified.

HTH,
-peter