Xbase++
Xbase++
XML Signature Multiple External References
See more XML Digital Signatures Examples
Demonstrates how to add multiple external references to an XML digital signature.Chilkat Xbase++ Downloads
LOCAL nSuccess
LOCAL oGen
LOCAL oObject1
LOCAL oHttp
LOCAL oBd
LOCAL cUrl
LOCAL oCert
LOCAL oSbXml
LOCAL oVerifier
LOCAL nVerified
nSuccess := 0
// 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>
//
nSuccess := 1
oGen := CreateObject("Chilkat.XmlDSigGen")
oGen:SigLocation := ""
oGen:SigLocationMod := 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.
oGen:SigId := "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4"
oGen:SigNamespacePrefix := "ds"
oGen:SigNamespaceUri := "http://www.w3.org/2000/09/xmldsig#"
oGen:SigValueId := "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue"
oGen:SignedInfoCanonAlg := "C14N"
oGen:SignedInfoDigestMethod := "sha256"
// Create an Object to be added to the Signature.
oObject1 := CreateObject("Chilkat.Xml")
oObject1:Tag := "xades:QualifyingProperties"
oObject1:AddAttribute("xmlns:xades", "http://uri.etsi.org/01903/v1.3.2#")
oObject1:AddAttribute("xmlns:xades141", "http://uri.etsi.org/01903/v1.4.1#")
oObject1:AddAttribute("Target", "#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4")
oObject1:UpdateAttrAt("xades:SignedProperties", 1, "Id", "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops")
oObject1:UpdateChildContent("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...
oObject1:UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod", 1, "Algorithm", "http://www.w3.org/2001/04/xmlenc#sha256")
oObject1:UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue", "TO BE GENERATED BY CHILKAT")
oObject1:UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2", "TO BE GENERATED BY CHILKAT")
oGen:AddObject("", oObject1:GetXml(), "", "")
oHttp := CreateObject("Chilkat.Http")
oBd := CreateObject("Chilkat.BinData")
cUrl := "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456"
nSuccess := oHttp:QuickGetBd(cUrl, oBd)
IF (nSuccess != 1)
? oHttp:LastErrorText
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
RETURN
ENDIF
// -------- Reference 1 --------
oGen:AddExternalBinaryRef(cUrl, oBd, "sha256", "")
oGen:SetRefIdAttr(cUrl, "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0")
// -------- Reference 2 --------
oBd:Clear()
cUrl := "https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1"
nSuccess := oHttp:QuickGetBd(cUrl, oBd)
IF (nSuccess != 1)
? oHttp:LastErrorText
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
RETURN
ENDIF
oGen:AddExternalBinaryRef(cUrl, oBd, "sha256", "")
oGen:SetRefIdAttr(cUrl, "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1")
// -------- Reference 3 --------
oBd:Clear()
cUrl := "https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1"
nSuccess := oHttp:QuickGetBd(cUrl, oBd)
IF (nSuccess != 1)
? oHttp:LastErrorText
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
RETURN
ENDIF
oGen:AddExternalBinaryRef(cUrl, oBd, "sha256", "")
oGen:SetRefIdAttr(cUrl, "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2")
// -------- Reference 4 --------
oBd:Clear()
cUrl := "https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1"
nSuccess := oHttp:QuickGetBd(cUrl, oBd)
IF (nSuccess != 1)
? oHttp:LastErrorText
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
RETURN
ENDIF
oGen:AddExternalBinaryRef(cUrl, oBd, "sha256", "")
oGen:SetRefIdAttr(cUrl, "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3")
// -------- Reference 5 --------
oGen:AddObjectRef("xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops", "sha256", "C14N", "", "http://uri.etsi.org/01903#SignedProperties")
// Provide a certificate + private key. (PFX password is test123)
oCert := CreateObject("Chilkat.Cert")
nSuccess := oCert:LoadPfxFile("qa_data/pfx/cert_test123.pfx", "test123")
IF (nSuccess != 1)
? oCert:LastErrorText
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
oCert:destroy()
RETURN
ENDIF
oGen:SetX509Cert(oCert, 1)
oGen:KeyInfoType := "X509Data"
oGen:X509Type := "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.
oSbXml := CreateObject("Chilkat.StringBuilder")
oGen:Behaviors := "IndentedSignature"
// Sign the XML...
nSuccess := oGen:CreateXmlDSigSb(oSbXml)
IF (nSuccess != 1)
? oGen:LastErrorText
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
oCert:destroy()
oSbXml:destroy()
RETURN
ENDIF
// -----------------------------------------------
// Save the signed XML to a file.
nSuccess := oSbXml:WriteFile("qa_output/signedXml.xml", "utf-8", 0)
? oSbXml:GetAsString()
// ----------------------------------------
// Verify the signature we just produced...
oVerifier := CreateObject("Chilkat.XmlDSig")
nSuccess := oVerifier:LoadSignatureSb(oSbXml)
IF (nSuccess != 1)
? oVerifier:LastErrorText
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
oCert:destroy()
oSbXml:destroy()
oVerifier:destroy()
RETURN
ENDIF
nVerified := oVerifier:VerifySignature(1)
IF (nVerified != 1)
? oVerifier:LastErrorText
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
oCert:destroy()
oSbXml:destroy()
oVerifier:destroy()
RETURN
ENDIF
? "This signature was successfully verified."
oGen:destroy()
oObject1:destroy()
oHttp:destroy()
oBd:destroy()
oCert:destroy()
oSbXml:destroy()
oVerifier:destroy()