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(Tcl) XML Signature Multiple External ReferencesDemonstrates how to add multiple external references to an XML digital signature.
load ./chilkat.dll # This example requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. # This example creates the following signed XML with multiple external references: # <?xml version="1.0" encoding="UTF-8"?> # <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4"> # <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-2dde88a8-def0-43e4-8570-b031015a46b4-ref0" URI="https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456"> # <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> # <ds:DigestValue>...</ds:DigestValue> # </ds:Reference> # <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1" URI="https://isus.ezdrowie.gov.pl/fhir/Encounter/124/_history/22"> # <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> # <ds:DigestValue>...</ds:DigestValue> # </ds:Reference> # <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2" URI="https://isus.ezdrowie.gov.pl/fhir/Condition/125/_history/1"> # <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> # <ds:DigestValue>...</ds:DigestValue> # </ds:Reference> # <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3" URI="https://isus.ezdrowie.gov.pl/fhir/Procedure/126/_history/1"> # <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> # <ds:DigestValue>...</ds:DigestValue> # </ds:Reference> # <ds:Reference Type="http://uri.etsi.org/01903#SignedProperties" URI="#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops"> # <ds:Transforms> # <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/> # </ds:Transforms> # <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> # <ds:DigestValue>...</ds:DigestValue> # </ds:Reference> # </ds:SignedInfo> # <ds:SignatureValue Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue">...</ds:SignatureValue> # <ds:KeyInfo> # <ds:X509Data> # <ds:X509Certificate>...</ds:X509Certificate> # <ds:X509SubjectName>...</ds:X509SubjectName> # <ds:X509IssuerSerial> # <ds:X509IssuerName>...</ds:X509IssuerName> # <ds:X509SerialNumber>...</ds:X509SerialNumber> # </ds:X509IssuerSerial> # </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-2dde88a8-def0-43e4-8570-b031015a46b4"> # <xades:SignedProperties Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops"> # <xades:SignedSignatureProperties> # <xades:SigningTime>2021-06-02T07:10:13.306+02:00</xades:SigningTime> # <xades:SigningCertificate> # <xades:Cert> # <xades:CertDigest> # <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> # <ds:DigestValue>...</ds:DigestValue> # </xades:CertDigest> # <xades:IssuerSerial> # <ds:X509IssuerName>...</ds:X509IssuerName> # <ds:X509SerialNumber>...</ds:X509SerialNumber> # </xades:IssuerSerial> # </xades:Cert> # <xades:Cert> # <xades:CertDigest> # <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> # <ds:DigestValue>...</ds:DigestValue> # </xades:CertDigest> # <xades:IssuerSerial> # <ds:X509IssuerName>...</ds:X509IssuerName> # <ds:X509SerialNumber>...</ds:X509SerialNumber> # </xades:IssuerSerial> # </xades:Cert> # <xades:Cert> # <xades:CertDigest> # <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> # <ds:DigestValue>...</ds:DigestValue> # </xades:CertDigest> # <xades:IssuerSerial> # <ds:X509IssuerName>...</ds:X509IssuerName> # <ds:X509SerialNumber>...</ds:X509SerialNumber> # </xades:IssuerSerial> # </xades:Cert> # </xades:SigningCertificate> # </xades:SignedSignatureProperties> # </xades:SignedProperties> # </xades:QualifyingProperties> # </ds:Object> # </ds:Signature> # set success 1 set gen [new_CkXmlDSigGen] CkXmlDSigGen_put_SigLocation $gen "" CkXmlDSigGen_put_SigLocationMod $gen 0 # Note: ID's simply need to be unique values in the signed XML document. They don't necessarily need to be GUID/UUID formatted. CkXmlDSigGen_put_SigId $gen "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4" CkXmlDSigGen_put_SigNamespacePrefix $gen "ds" CkXmlDSigGen_put_SigNamespaceUri $gen "http://www.w3.org/2000/09/xmldsig#" CkXmlDSigGen_put_SigValueId $gen "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue" CkXmlDSigGen_put_SignedInfoCanonAlg $gen "C14N" CkXmlDSigGen_put_SignedInfoDigestMethod $gen "sha256" # Create an Object to be added to the Signature. set object1 [new_CkXml] CkXml_put_Tag $object1 "xades:QualifyingProperties" CkXml_AddAttribute $object1 "xmlns:xades" "http://uri.etsi.org/01903/v1.3.2#" CkXml_AddAttribute $object1 "xmlns:xades141" "http://uri.etsi.org/01903/v1.4.1#" CkXml_AddAttribute $object1 "Target" "#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4" CkXml_UpdateAttrAt $object1 "xades:SignedProperties" 1 "Id" "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime" "TO BE GENERATED BY CHILKAT" # This assumes there are 3 certs in the certificate chain: The signing certificate, an intermediate root, and the root CA. # Remove the lines with "Cert[2]" if there is no intermediate root... CkXml_UpdateAttrAt $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod" 1 "Algorithm" "http://www.w3.org/2001/04/xmlenc#sha256" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue" "TO BE GENERATED BY CHILKAT" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName" "TO BE GENERATED BY CHILKAT" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber" "TO BE GENERATED BY CHILKAT" CkXml_UpdateAttrAt $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestMethod" 1 "Algorithm" "http://www.w3.org/2001/04/xmlenc#sha256" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestValue" "TO BE GENERATED BY CHILKAT" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509IssuerName" "TO BE GENERATED BY CHILKAT" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509SerialNumber" "TO BE GENERATED BY CHILKAT" CkXml_UpdateAttrAt $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestMethod" 1 "Algorithm" "http://www.w3.org/2001/04/xmlenc#sha256" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestValue" "TO BE GENERATED BY CHILKAT" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509IssuerName" "TO BE GENERATED BY CHILKAT" CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509SerialNumber" "TO BE GENERATED BY CHILKAT" CkXmlDSigGen_AddObject $gen "" [CkXml_getXml $object1] "" "" set http [new_CkHttp] set bd [new_CkBinData] set url "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456" set success [CkHttp_QuickGetBd $http $url $bd] if {$success != 1} then { puts [CkHttp_lastErrorText $http] delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd exit } # -------- Reference 1 -------- CkXmlDSigGen_AddExternalBinaryRef $gen $url $bd "sha256" "" CkXmlDSigGen_SetRefIdAttr $gen $url "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0" # -------- Reference 2 -------- CkBinData_Clear $bd set url "https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1" set success [CkHttp_QuickGetBd $http $url $bd] if {$success != 1} then { puts [CkHttp_lastErrorText $http] delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd exit } CkXmlDSigGen_AddExternalBinaryRef $gen $url $bd "sha256" "" CkXmlDSigGen_SetRefIdAttr $gen $url "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1" # -------- Reference 3 -------- CkBinData_Clear $bd set url "https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1" set success [CkHttp_QuickGetBd $http $url $bd] if {$success != 1} then { puts [CkHttp_lastErrorText $http] delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd exit } CkXmlDSigGen_AddExternalBinaryRef $gen $url $bd "sha256" "" CkXmlDSigGen_SetRefIdAttr $gen $url "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2" # -------- Reference 4 -------- CkBinData_Clear $bd set url "https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1" set success [CkHttp_QuickGetBd $http $url $bd] if {$success != 1} then { puts [CkHttp_lastErrorText $http] delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd exit } CkXmlDSigGen_AddExternalBinaryRef $gen $url $bd "sha256" "" CkXmlDSigGen_SetRefIdAttr $gen $url "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3" # -------- Reference 5 -------- CkXmlDSigGen_AddObjectRef $gen "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops" "sha256" "C14N" "" "http://uri.etsi.org/01903#SignedProperties" # Provide a certificate + private key. (PFX password is test123) set cert [new_CkCert] set success [CkCert_LoadPfxFile $cert "qa_data/pfx/cert_test123.pfx" "test123"] if {$success != 1} then { puts [CkCert_lastErrorText $cert] delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd delete_CkCert $cert exit } CkXmlDSigGen_SetX509Cert $gen $cert 1 CkXmlDSigGen_put_KeyInfoType $gen "X509Data" CkXmlDSigGen_put_X509Type $gen "IssuerSerial,SubjectName,Certificate" # This will be an enveloping signature where the Signature element # is the XML document root, the signed data is contained within Object # tag(s) within the Signature. # Therefore, pass an empty sbXml to CreateXmlDsigSb. set sbXml [new_CkStringBuilder] CkXmlDSigGen_put_Behaviors $gen "IndentedSignature" # Sign the XML... set success [CkXmlDSigGen_CreateXmlDSigSb $gen $sbXml] if {$success != 1} then { puts [CkXmlDSigGen_lastErrorText $gen] delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd delete_CkCert $cert delete_CkStringBuilder $sbXml exit } # ----------------------------------------------- # Save the signed XML to a file. set success [CkStringBuilder_WriteFile $sbXml "qa_output/signedXml.xml" "utf-8" 0] puts [CkStringBuilder_getAsString $sbXml] # ---------------------------------------- # Verify the signature we just produced... set verifier [new_CkXmlDSig] set success [CkXmlDSig_LoadSignatureSb $verifier $sbXml] if {$success != 1} then { puts [CkXmlDSig_lastErrorText $verifier] delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd delete_CkCert $cert delete_CkStringBuilder $sbXml delete_CkXmlDSig $verifier exit } set verified [CkXmlDSig_VerifySignature $verifier 1] if {$verified != 1} then { puts [CkXmlDSig_lastErrorText $verifier] delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd delete_CkCert $cert delete_CkStringBuilder $sbXml delete_CkXmlDSig $verifier exit } puts "This signature was successfully verified." delete_CkXmlDSigGen $gen delete_CkXml $object1 delete_CkHttp $http delete_CkBinData $bd delete_CkCert $cert delete_CkStringBuilder $sbXml delete_CkXmlDSig $verifier |
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