(PureBasic) Verify Multiple Signatures in XML

Demonstrates how to verify multiple signatures within a single XML document.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkHttp.pb"
IncludeFile "CkStringBuilder.pb"
IncludeFile "CkXmlDSig.pb"
IncludeFile "CkXml.pb"

Procedure ChilkatExample()

    ; This example requires the Chilkat API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.

    ; A sample XML file containing multiple signatures is available at:
    ; https://www.chilkatsoft.com/exampleData/document.signed.bes.cs.xml

    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    sbXml.i = CkStringBuilder::ckCreate()
    If sbXml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkHttp::ckQuickGetSb(http,"https://www.chilkatsoft.com/exampleData/document.signed.bes.cs.xml",sbXml)
    If success <> 1
        Debug CkHttp::ckLastErrorText(http)
        CkHttp::ckDispose(http)
        CkStringBuilder::ckDispose(sbXml)
        ProcedureReturn
    EndIf

    ; Load the XML containing the signature to be verified.
    verifier.i = CkXmlDSig::ckCreate()
    If verifier.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkXmlDSig::ckLoadSignatureSb(verifier,sbXml)
    If success <> 1
        Debug CkXmlDSig::ckLastErrorText(verifier)
        CkHttp::ckDispose(http)
        CkStringBuilder::ckDispose(sbXml)
        CkXmlDSig::ckDispose(verifier)
        ProcedureReturn
    EndIf

    ; How many Signatures exist in this XML?
    Debug "Number of XML signatures = " + Str(CkXmlDSig::ckNumSignatures(verifier))

    ; Let's show the XML nicely indented, so we can make sense of it.
    ; Loading the XML into an XML parser and re-emitting with nice formatting
    ; changes whitespace that breaks the signatures.  We're only doing this
    ; for the example to examine this XML, which contains 2 ds:Signature's
    ; and each signature has multiple references.

    ; This is what we have:
    ; (scroll down to continue with this example..)

    ; <?xml version="1.0" encoding="UTF-8" ?>
    ; <collection Id="root">
    ;     <album>
    ;         <title>Questions, unanswered</title>
    ;         <artist>Steve and the flubberblubs</artist>
    ;         <year>1989</year>
    ;         <t:tracks xmlns:t="http://test.xades4j/tracks">
    ;             <t:song length="4:05" tracknumber="1">
    ;                 <t:title>What do you know?</t:title>
    ;                 <t:artist>Steve and the flubberblubs</t:artist>
    ;                 <t:lastplayed>2006-10-17-08:31</t:lastplayed>
    ;             </t:song>
    ;             <t:song length="3:45" tracknumber="2">
    ;                 <t:title>Who do you know?</t:title>
    ;                 <t:artist>Steve and the flubberblubs</t:artist>
    ;                 <t:lastplayed>2006-10-17-08:35</t:lastplayed>
    ;             </t:song>
    ;             <t:song length="5:14" tracknumber="3">
    ;                 <t:title>When do you know?</t:title>
    ;                 <t:artist>Steve and the flubberblubs</t:artist>
    ;                 <t:lastplayed>2006-10-17-08:39</t:lastplayed>
    ;             </t:song>
    ;             <t:song length="4:19" tracknumber="4">
    ;                 <t:title>Do you know?</t:title>
    ;                 <t:artist>Steve and the flubberblubs</t:artist>
    ;                 <t:lastplayed>2006-10-17-08:44</t:lastplayed>
    ;             </t:song>
    ;         </t:tracks>
    ;     </album>
    ;     <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad">
    ;         <ds:SignedInfo>
    ;             <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
    ;             <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />
    ;             <ds:Reference Id="xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-ref0" URI="#root">
    ;                 <ds:Transforms>
    ;                     <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature" />
    ;                 </ds:Transforms>
    ;                 <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                 <ds:DigestValue>rD/g8soqKz8EiPUBhEWfcQacS0ta4ULHX3dKMEH6ZoQ=</ds:DigestValue>
    ;             </ds:Reference>
    ;             <ds:Reference Type="http://uri.etsi.org/01903#SignedProperties" URI="#xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-signedprops">
    ;                 <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                 <ds:DigestValue>pfrrRjkGNPiRF2Bjuj3IJTGSEFYc2PDs6FCNAUJOu8E=</ds:DigestValue>
    ;             </ds:Reference>
    ;         </ds:SignedInfo>
    ;         <ds:SignatureValue Id="xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-sigvalue">Vb/2ay4rX9cytiRCmBkgRkE4d0E05nkM412CwOHvTagCXPZZ2B2ifbmrQznTEU6Jz0dF65j5kU7C
    ; bYK+9fMKB0lmqx2kUdWeBa30Rl/3ELKWKOLeDFN91zC3q4a6dtzQGwBidWex+2dO8Z69sBd2aTS6
    ; S6nyGs53kTspDHfBeyg=</ds:SignatureValue>
    ;         <ds:KeyInfo>
    ;             <ds:X509Data>
    ;                 <ds:X509Certificate>MIICbTCCAdqgAwIBAgIQpkK0uals+ItHxBlpJuypOTAJBgUrDgMCHQUAMD8xCzAJBgNVBAYTAlBU
    ; MQ0wCwYDVQQKEwRJU0VMMQswCQYDVQQLEwJDQzEUMBIGA1UEAxMLSXRlcm1lZGlhdGUwHhcNMTAw
    ; NjI1MTc1ODQ5WhcNMzkxMjMxMjM1OTU5WjBCMQswCQYDVQQGEwJQVDENMAsGA1UEChMESVNFTDEL
    ; MAkGA1UECxMCQ0MxFzAVBgNVBAMTDkx1aXMgR29uY2FsdmVzMIGfMA0GCSqGSIb3DQEBAQUAA4GN
    ; ADCBiQKBgQCpP9acMX69Dbg9ciMLFc5dm1tlpTY9OTNZ/EaCYoGVhh/3+DFgyIbEer6SA24hpREm
    ; AhNG9+Ca0AurDPPgb3aKWFY9pj1WcOctis0VsR0YvzqP+2IGFqKDCd7bXFvv2tI0dEvpdc0oO6PF
    ; Q02xvJG0kxQf44XljOCjUBU43jkJawIDAQABo28wbTBrBgNVHQEEZDBigBBdbbL4pDKLT56PpOpA
    ; /56toTwwOjELMAkGA1UEBhMCUFQxDTALBgNVBAoTBElTRUwxCzAJBgNVBAsTAkNDMQ8wDQYDVQQD
    ; EwZUZXN0Q0GCEN00x9qe7SuWQvpLK0/oay8wCQYFKw4DAh0FAAOBgQBSma8g9dQjiQo4WUljRRuG
    ; yMUVRyCqW/9oRz8+0EoLNR/AhrIlGqdNbqQ1BkncgNNdqMAus5VD34v/EhgrkgWN5fZajMpYsmcR
    ; Ahu4PzJ6hggAlWWMy245JwIYuV0s1Oi39GVTxVNOBIX//AONZlGWO4S2Psb1mqdZ99b/MugsaA==</ds:X509Certificate>
    ;             </ds:X509Data>
    ;         </ds:KeyInfo>
    ;         <ds:Object>
    ;             <xades:QualifyingProperties xmlns:xades="http://uri.etsi.org/01903/v1.3.2#" xmlns:xades141="http://uri.etsi.org/01903/v1.4.1#" Target="#xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad">
    ;                 <xades:SignedProperties Id="xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-signedprops">
    ;                     <xades:SignedSignatureProperties>
    ;                         <xades:SigningCertificate>
    ;                             <xades:Cert>
    ;                                 <xades:CertDigest>
    ;                                     <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                                     <ds:DigestValue>4btVb5gQ5cdcNhGpvDSWQZabPQrR9jf1x8e3YF9Ajss=</ds:DigestValue>
    ;                                 </xades:CertDigest>
    ;                                 <xades:IssuerSerial>
    ;                                     <ds:X509IssuerName>CN=Itermediate,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    ;                                     <ds:X509SerialNumber>-119284162484605703133798696662099777223</ds:X509SerialNumber>
    ;                                 </xades:IssuerSerial>
    ;                             </xades:Cert>
    ;                             <xades:Cert>
    ;                                 <xades:CertDigest>
    ;                                     <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                                     <ds:DigestValue>vm5QpbblsWV7fCYXotPhNTeCt4nk8cLFuF36L5RJ4Ok=</ds:DigestValue>
    ;                                 </xades:CertDigest>
    ;                                 <xades:IssuerSerial>
    ;                                     <ds:X509IssuerName>CN=TestCA,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    ;                                     <ds:X509SerialNumber>-46248926895392336918291885380930606289</ds:X509SerialNumber>
    ;                                 </xades:IssuerSerial>
    ;                             </xades:Cert>
    ;                             <xades:Cert>
    ;                                 <xades:CertDigest>
    ;                                     <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                                     <ds:DigestValue>AUaN+IdhKQqxIVmEOrFwq+Dn22ebTkXJqD3BoOP/x8E=</ds:DigestValue>
    ;                                 </xades:CertDigest>
    ;                                 <xades:IssuerSerial>
    ;                                     <ds:X509IssuerName>CN=TestCA,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    ;                                     <ds:X509SerialNumber>-99704378678639105802976522062798066869</ds:X509SerialNumber>
    ;                                 </xades:IssuerSerial>
    ;                             </xades:Cert>
    ;                         </xades:SigningCertificate>
    ;                         <xades:SignerRole>
    ;                             <xades:ClaimedRoles>
    ;                                 <xades:ClaimedRole>CounterSignature maniac</xades:ClaimedRole>
    ;                             </xades:ClaimedRoles>
    ;                         </xades:SignerRole>
    ;                     </xades:SignedSignatureProperties>
    ;                 </xades:SignedProperties>
    ;                 <xades:UnsignedProperties>
    ;                     <xades:UnsignedSignatureProperties>
    ;                         <xades:CounterSignature>
    ;                             <ds:Signature Id="xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c" xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
    ;                                 <ds:SignedInfo>
    ;                                     <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
    ;                                     <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256" />
    ;                                     <ds:Reference Id="xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-ref0" URI="#xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-sigvalue">
    ;                                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                                         <ds:DigestValue>Nr5JKCScyqjKWneJw2AC6YmdU/2JZA5Pj40fkVCFbL4=</ds:DigestValue>
    ;                                     </ds:Reference>
    ;                                     <ds:Reference Type="http://uri.etsi.org/01903#SignedProperties" URI="#xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-signedprops">
    ;                                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                                         <ds:DigestValue>PJWDlPFdx4TJ5AXT3nIbFa2euboYGM7bpuBmol4nKSQ=</ds:DigestValue>
    ;                                     </ds:Reference>
    ;                                 </ds:SignedInfo>
    ;                                 <ds:SignatureValue Id="xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-sigvalue">MCcli4l5rAsGeJX2gOmoYDIAXnbszmRwOH94y7kHnpxCwGwoVrCaLSONtgKEy8mj9Ehqa/R5Dj5g
    ; DgC77VkNIaRKD613JMnbsaqZ7PD0iVivLvBkasTch4PX92UEbk8EvCgzxvhlgN+L6zSLsv65sFcR
    ; lFUGluMtzrqlDKvts38=</ds:SignatureValue>
    ;                                 <ds:KeyInfo>
    ;                                     <ds:X509Data>
    ;                                         <ds:X509Certificate>MIICbTCCAdqgAwIBAgIQpkK0uals+ItHxBlpJuypOTAJBgUrDgMCHQUAMD8xCzAJBgNVBAYTAlBU
    ; MQ0wCwYDVQQKEwRJU0VMMQswCQYDVQQLEwJDQzEUMBIGA1UEAxMLSXRlcm1lZGlhdGUwHhcNMTAw
    ; NjI1MTc1ODQ5WhcNMzkxMjMxMjM1OTU5WjBCMQswCQYDVQQGEwJQVDENMAsGA1UEChMESVNFTDEL
    ; MAkGA1UECxMCQ0MxFzAVBgNVBAMTDkx1aXMgR29uY2FsdmVzMIGfMA0GCSqGSIb3DQEBAQUAA4GN
    ; ADCBiQKBgQCpP9acMX69Dbg9ciMLFc5dm1tlpTY9OTNZ/EaCYoGVhh/3+DFgyIbEer6SA24hpREm
    ; AhNG9+Ca0AurDPPgb3aKWFY9pj1WcOctis0VsR0YvzqP+2IGFqKDCd7bXFvv2tI0dEvpdc0oO6PF
    ; Q02xvJG0kxQf44XljOCjUBU43jkJawIDAQABo28wbTBrBgNVHQEEZDBigBBdbbL4pDKLT56PpOpA
    ; /56toTwwOjELMAkGA1UEBhMCUFQxDTALBgNVBAoTBElTRUwxCzAJBgNVBAsTAkNDMQ8wDQYDVQQD
    ; EwZUZXN0Q0GCEN00x9qe7SuWQvpLK0/oay8wCQYFKw4DAh0FAAOBgQBSma8g9dQjiQo4WUljRRuG
    ; yMUVRyCqW/9oRz8+0EoLNR/AhrIlGqdNbqQ1BkncgNNdqMAus5VD34v/EhgrkgWN5fZajMpYsmcR
    ; Ahu4PzJ6hggAlWWMy245JwIYuV0s1Oi39GVTxVNOBIX//AONZlGWO4S2Psb1mqdZ99b/MugsaA==</ds:X509Certificate>
    ;                                     </ds:X509Data>
    ;                                 </ds:KeyInfo>
    ;                                 <ds:Object>
    ;                                     <xades:QualifyingProperties Target="#xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c" xmlns:xades="http://uri.etsi.org/01903/v1.3.2#" xmlns:xades141="http://uri.etsi.org/01903/v1.4.1#">
    ;                                         <xades:SignedProperties Id="xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-signedprops">
    ;                                             <xades:SignedSignatureProperties>
    ;                                                 <xades:SigningTime>2012-10-13T14:26:18.783+01:00</xades:SigningTime>
    ;                                                 <xades:SigningCertificate>
    ;                                                     <xades:Cert>
    ;                                                         <xades:CertDigest>
    ;                                                             <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                                                             <ds:DigestValue>4btVb5gQ5cdcNhGpvDSWQZabPQrR9jf1x8e3YF9Ajss=</ds:DigestValue>
    ;                                                         </xades:CertDigest>
    ;                                                         <xades:IssuerSerial>
    ;                                                             <ds:X509IssuerName>CN=Itermediate,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    ;                                                             <ds:X509SerialNumber>-119284162484605703133798696662099777223</ds:X509SerialNumber>
    ;                                                         </xades:IssuerSerial>
    ;                                                     </xades:Cert>
    ;                                                     <xades:Cert>
    ;                                                         <xades:CertDigest>
    ;                                                             <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                                                             <ds:DigestValue>vm5QpbblsWV7fCYXotPhNTeCt4nk8cLFuF36L5RJ4Ok=</ds:DigestValue>
    ;                                                         </xades:CertDigest>
    ;                                                         <xades:IssuerSerial>
    ;                                                             <ds:X509IssuerName>CN=TestCA,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    ;                                                             <ds:X509SerialNumber>-46248926895392336918291885380930606289</ds:X509SerialNumber>
    ;                                                         </xades:IssuerSerial>
    ;                                                     </xades:Cert>
    ;                                                     <xades:Cert>
    ;                                                         <xades:CertDigest>
    ;                                                             <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256" />
    ;                                                             <ds:DigestValue>AUaN+IdhKQqxIVmEOrFwq+Dn22ebTkXJqD3BoOP/x8E=</ds:DigestValue>
    ;                                                         </xades:CertDigest>
    ;                                                         <xades:IssuerSerial>
    ;                                                             <ds:X509IssuerName>CN=TestCA,OU=CC,O=ISEL,C=PT</ds:X509IssuerName>
    ;                                                             <ds:X509SerialNumber>-99704378678639105802976522062798066869</ds:X509SerialNumber>
    ;                                                         </xades:IssuerSerial>
    ;                                                     </xades:Cert>
    ;                                                 </xades:SigningCertificate>
    ;                                             </xades:SignedSignatureProperties>
    ;                                         </xades:SignedProperties>
    ;                                     </xades:QualifyingProperties>
    ;                                 </ds:Object>
    ;                             </ds:Signature>
    ;                         </xades:CounterSignature>
    ;                     </xades:UnsignedSignatureProperties>
    ;                 </xades:UnsignedProperties>
    ;             </xades:QualifyingProperties>
    ;         </ds:Object>
    ;     </ds:Signature>
    ; </collection>
    ; 

    ; When I look at the complicated XML above, there are specific things I look at to get a handle
    ; on the situation.
    ; 
    ; 1) Does the signature already embed the public keys required for verification?  
    ;    Within each <ds:Signature>, look for the <ds:KeyInfo>.  In this case, I can see that
    ;    each signature contains the full X.509 certificate needed to verify (<ds:KeyInfo><ds:X509Data><ds:X509Certificate>).
    ;    This means that Chilkat will automatically use the public keys contained within the base64 certificates
    ;    already present in the signature. 
    ; 
    ;  2) Look at each <ds:Reference> within each <ds:Signature>.  Do the URI attribute values begin with "#"?
    ;     If so, then these are same-document references, and there's no need to explicitly fetch external data for reference verification.
    ;     Chilkat can automatically validate each same-document Reference.
    ; 
    ; So it turns out that this seemingly formidable XML document is easy to verify...
    ; Here we go...

    i.i = 0
    While i < CkXmlDSig::ckNumSignatures(verifier)
        ; The Selector property is used to set our context to the Nth signature.
        ; For example, if VerifySignature is called when Selector = 0, then the 1st signature is verified.
        ; If VerifySignature is called when Selector = 1, then the 2nd signature is verified, and so on.
        CkXmlDSig::setCkSelector(verifier, i)

        verifyReferenceDigests.i = 1

        ; The quick way to validate all references and the signature over the SignedInfo
        ; is to call VerifySignature with verifyReferenceDigests equal to 1.
        verified.i = CkXmlDSig::ckVerifySignature(verifier,verifyReferenceDigests)
        Debug "Signature " + Str(i + 1) + " and all reference digests verified = " + Str(verified)

        ; We can also get information about each signature.
        ; For example, we could get information about each Reference...
        ; The NumReferences property returns the number of references for the Signature indicated by the Selector property.
        numReferences.i = CkXmlDSig::ckNumReferences(verifier)
        Debug "  number of references: " + Str(numReferences)

        j.i = 0
        While j < numReferences
            ; Get information about the Jth reference in the Ith signature.
            Debug "  reference " + Str(j) + ":"
            ; Is this a same-document or external reference?
            Debug "      is external: " + Str(CkXmlDSig::ckIsReferenceExternal(verifier,j))
            ; For external references, the URI could be used by an application to fetch the referenced data...
            Debug "      uri: " + CkXmlDSig::ckReferenceUri(verifier,j)
            j = j + 1
        Wend

        ; We could also get the KeyInfo for each Signature, which might be needed if we need to 
        ; load and set a public key that is not physically present within the KeyInfo already.
        keyInfoXml.i = CkXmlDSig::ckGetKeyInfo(verifier)
        Debug "  key info: " + CkXml::ckGetXml(keyInfoXml)
        CkXml::ckDispose(keyInfoXml)

        i = i + 1

    Wend

    ; Here's the output of this example:

    ; Number of XML signatures = 2
    ; Signature 1 and all reference digests verified = True
    ;   number of references: 2
    ;   reference 0:
    ;       is external: False
    ;       uri: #root
    ;   reference 1:
    ;       is external: False
    ;       uri: #xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-signedprops
    ;   key info: 
    ; <ds:KeyInfo>
    ;     <ds:X509Data>
    ;         <ds:X509Certificate>
    ; MIICbTCCAdqgAwIBAgIQpkK0uals+ItHxBlpJuypOTAJBgUrDgMCHQUAMD8xCzAJBgNVBAYTAlBU
    ; MQ0wCwYDVQQKEwRJU0VMMQswCQYDVQQLEwJDQzEUMBIGA1UEAxMLSXRlcm1lZGlhdGUwHhcNMTAw
    ; NjI1MTc1ODQ5WhcNMzkxMjMxMjM1OTU5WjBCMQswCQYDVQQGEwJQVDENMAsGA1UEChMESVNFTDEL
    ; MAkGA1UECxMCQ0MxFzAVBgNVBAMTDkx1aXMgR29uY2FsdmVzMIGfMA0GCSqGSIb3DQEBAQUAA4GN
    ; ADCBiQKBgQCpP9acMX69Dbg9ciMLFc5dm1tlpTY9OTNZ/EaCYoGVhh/3+DFgyIbEer6SA24hpREm
    ; AhNG9+Ca0AurDPPgb3aKWFY9pj1WcOctis0VsR0YvzqP+2IGFqKDCd7bXFvv2tI0dEvpdc0oO6PF
    ; Q02xvJG0kxQf44XljOCjUBU43jkJawIDAQABo28wbTBrBgNVHQEEZDBigBBdbbL4pDKLT56PpOpA
    ; /56toTwwOjELMAkGA1UEBhMCUFQxDTALBgNVBAoTBElTRUwxCzAJBgNVBAsTAkNDMQ8wDQYDVQQD
    ; EwZUZXN0Q0GCEN00x9qe7SuWQvpLK0/oay8wCQYFKw4DAh0FAAOBgQBSma8g9dQjiQo4WUljRRuG
    ; yMUVRyCqW/9oRz8+0EoLNR/AhrIlGqdNbqQ1BkncgNNdqMAus5VD34v/EhgrkgWN5fZajMpYsmcR
    ; Ahu4PzJ6hggAlWWMy245JwIYuV0s1Oi39GVTxVNOBIX//AONZlGWO4S2Psb1mqdZ99b/MugsaA==
    ; </ds:X509Certificate>
    ;     </ds:X509Data>
    ; </ds:KeyInfo>
    ; 
    ; Signature 2 and all reference digests verified = True
    ;   number of references: 2
    ;   reference 0:
    ;       is external: False
    ;       uri: #xmldsig-ff7d9ad7-f36d-4af0-b21a-7db2e840efad-sigvalue
    ;   reference 1:
    ;       is external: False
    ;       uri: #xmldsig-7479045c-8083-49eb-9043-1ac2af4a759c-signedprops
    ;   key info: 
    ; <ds:KeyInfo>
    ;     <ds:X509Data>
    ;         <ds:X509Certificate>
    ; MIICbTCCAdqgAwIBAgIQpkK0uals+ItHxBlpJuypOTAJBgUrDgMCHQUAMD8xCzAJBgNVBAYTAlBU
    ; MQ0wCwYDVQQKEwRJU0VMMQswCQYDVQQLEwJDQzEUMBIGA1UEAxMLSXRlcm1lZGlhdGUwHhcNMTAw
    ; NjI1MTc1ODQ5WhcNMzkxMjMxMjM1OTU5WjBCMQswCQYDVQQGEwJQVDENMAsGA1UEChMESVNFTDEL
    ; MAkGA1UECxMCQ0MxFzAVBgNVBAMTDkx1aXMgR29uY2FsdmVzMIGfMA0GCSqGSIb3DQEBAQUAA4GN
    ; ADCBiQKBgQCpP9acMX69Dbg9ciMLFc5dm1tlpTY9OTNZ/EaCYoGVhh/3+DFgyIbEer6SA24hpREm
    ; AhNG9+Ca0AurDPPgb3aKWFY9pj1WcOctis0VsR0YvzqP+2IGFqKDCd7bXFvv2tI0dEvpdc0oO6PF
    ; Q02xvJG0kxQf44XljOCjUBU43jkJawIDAQABo28wbTBrBgNVHQEEZDBigBBdbbL4pDKLT56PpOpA
    ; /56toTwwOjELMAkGA1UEBhMCUFQxDTALBgNVBAoTBElTRUwxCzAJBgNVBAsTAkNDMQ8wDQYDVQQD
    ; EwZUZXN0Q0GCEN00x9qe7SuWQvpLK0/oay8wCQYFKw4DAh0FAAOBgQBSma8g9dQjiQo4WUljRRuG
    ; yMUVRyCqW/9oRz8+0EoLNR/AhrIlGqdNbqQ1BkncgNNdqMAus5VD34v/EhgrkgWN5fZajMpYsmcR
    ; Ahu4PzJ6hggAlWWMy245JwIYuV0s1Oi39GVTxVNOBIX//AONZlGWO4S2Psb1mqdZ99b/MugsaA==
    ; </ds:X509Certificate>
    ;     </ds:X509Data>
    ; </ds:KeyInfo>
    ; 
    ; 


    CkHttp::ckDispose(http)
    CkStringBuilder::ckDispose(sbXml)
    CkXmlDSig::ckDispose(verifier)


    ProcedureReturn
EndProcedure