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XML Signature Multiple External References
See more XML Digital Signatures Examples
Demonstrates how to add multiple external references to an XML digital signature.Chilkat Go Downloads
success := false
// 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>
//
success = true
gen := chilkat.NewXmlDSigGen()
gen.SetSigLocation("")
gen.SetSigLocationMod(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.
gen.SetSigId("xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4")
gen.SetSigNamespacePrefix("ds")
gen.SetSigNamespaceUri("http://www.w3.org/2000/09/xmldsig#")
gen.SetSigValueId("xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue")
gen.SetSignedInfoCanonAlg("C14N")
gen.SetSignedInfoDigestMethod("sha256")
// Create an Object to be added to the Signature.
object1 := chilkat.NewXml()
object1.SetTag("xades:QualifyingProperties")
object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#")
object1.AddAttribute("xmlns:xades141","http://uri.etsi.org/01903/v1.4.1#")
object1.AddAttribute("Target","#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4")
object1.UpdateAttrAt("xades:SignedProperties",true,"Id","xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops")
object1.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...
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod",true,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2","TO BE GENERATED BY CHILKAT")
gen.AddObject("",*object1.GetXml(),"","")
http := chilkat.NewHttp()
bd := chilkat.NewBinData()
url := "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456"
success = http.QuickGetBd(url,bd)
if success != true {
fmt.Println(http.LastErrorText())
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
return
}
// -------- Reference 1 --------
gen.AddExternalBinaryRef(url,bd,"sha256","")
gen.SetRefIdAttr(url,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0")
// -------- Reference 2 --------
bd.Clear()
url = "https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1"
success = http.QuickGetBd(url,bd)
if success != true {
fmt.Println(http.LastErrorText())
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
return
}
gen.AddExternalBinaryRef(url,bd,"sha256","")
gen.SetRefIdAttr(url,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1")
// -------- Reference 3 --------
bd.Clear()
url = "https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1"
success = http.QuickGetBd(url,bd)
if success != true {
fmt.Println(http.LastErrorText())
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
return
}
gen.AddExternalBinaryRef(url,bd,"sha256","")
gen.SetRefIdAttr(url,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2")
// -------- Reference 4 --------
bd.Clear()
url = "https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1"
success = http.QuickGetBd(url,bd)
if success != true {
fmt.Println(http.LastErrorText())
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
return
}
gen.AddExternalBinaryRef(url,bd,"sha256","")
gen.SetRefIdAttr(url,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3")
// -------- Reference 5 --------
gen.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)
cert := chilkat.NewCert()
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if success != true {
fmt.Println(cert.LastErrorText())
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
cert.DisposeCert()
return
}
gen.SetX509Cert(cert,true)
gen.SetKeyInfoType("X509Data")
gen.SetX509Type("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.
sbXml := chilkat.NewStringBuilder()
gen.SetBehaviors("IndentedSignature")
// Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
if success != true {
fmt.Println(gen.LastErrorText())
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
cert.DisposeCert()
sbXml.DisposeStringBuilder()
return
}
// -----------------------------------------------
// Save the signed XML to a file.
success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",false)
fmt.Println(*sbXml.GetAsString())
// ----------------------------------------
// Verify the signature we just produced...
verifier := chilkat.NewXmlDSig()
success = verifier.LoadSignatureSb(sbXml)
if success != true {
fmt.Println(verifier.LastErrorText())
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
cert.DisposeCert()
sbXml.DisposeStringBuilder()
verifier.DisposeXmlDSig()
return
}
verified := verifier.VerifySignature(true)
if verified != true {
fmt.Println(verifier.LastErrorText())
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
cert.DisposeCert()
sbXml.DisposeStringBuilder()
verifier.DisposeXmlDSig()
return
}
fmt.Println("This signature was successfully verified.")
gen.DisposeXmlDSigGen()
object1.DisposeXml()
http.DisposeHttp()
bd.DisposeBinData()
cert.DisposeCert()
sbXml.DisposeStringBuilder()
verifier.DisposeXmlDSig()