[xmlsec] WSSE signature validation fails

[Tomer Azran]

Hello,

We are trying to use xmlsec1 utility in order to verify a soap response with a <Signature xmlns="http://www.w3.org/2000/09/xmldsig#"> element.
This is the KeyInfo element in the soap envelope (I removed the actual key identifier data):

<KeyInfo>
                <wsse:SecurityTokenReference xmlns="">
                                <wsse:KeyIdentifier ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509SubjectKeyIdentifier" EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary">[BASE64 STRING]</wsse:KeyIdentifier>
                </wsse:SecurityTokenReference>
</KeyInfo>

I'm running the following command in order to verify the signature:
/usr/bin/xmlsec1 --verify answer.xml

Getting the following error:

func=xmlSecXPathDataExecute:file=xpath.c:line=273:obj=unknown:subj=xmlXPtrEval:error=5:libxml2 library function failed:expr=xpointer(id('Id-c96770b6-807c-44e5-b070-9a01f2fcf9ef'))
func=xmlSecXPathDataListExecute:file=xpath.c:line=373:obj=unknown:subj=xmlSecXPathDataExecute:error=1:xmlsec library function failed:
func=xmlSecTransformXPathExecute:file=xpath.c:line=483:obj=xpointer:subj=xmlSecXPathDataExecute:error=1:xmlsec library function failed:
func=xmlSecTransformDefaultPushXml:file=transforms.c:line=2405:obj=xpointer:subj=xmlSecTransformExecute:error=1:xmlsec library function failed:
func=xmlSecTransformCtxXmlExecute:file=transforms.c:line=1236:obj=unknown:subj=xmlSecTransformPushXml:error=1:xmlsec library function failed:transform=xpointer
func=xmlSecTransformCtxExecute:file=transforms.c:line=1296:obj=unknown:subj=xmlSecTransformCtxXmlExecute:error=1:xmlsec library function failed:
func=xmlSecDSigReferenceCtxProcessNode:file=xmldsig.c:line=1571:obj=unknown:subj=xmlSecTransformCtxExecute:error=1:xmlsec library function failed:
func=xmlSecDSigCtxProcessSignedInfoNode:file=xmldsig.c:line=804:obj=unknown:subj=xmlSecDSigReferenceCtxProcessNode:error=1:xmlsec library function failed:node=Reference
func=xmlSecDSigCtxProcessSignatureNode:file=xmldsig.c:line=547:obj=unknown:subj=xmlSecDSigCtxProcessSignedInfoNode:error=1:xmlsec library function failed:
func=xmlSecDSigCtxVerify:file=xmldsig.c:line=366:obj=unknown:subj=xmlSecDSigCtxSignatureProcessNode:error=1:xmlsec library function failed:
Error: signature failed
ERROR
SignedInfo References (ok/all): 0/1
Manifests References (ok/all): 0/0
Error: failed to verify file "answer.xml"

Can you please advise?

Tomer.
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