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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 PowerShell Downloads
Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"
$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 = New-Object Chilkat.XmlDSigGen
$gen.SigLocation = ""
$gen.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.
$gen.SigId = "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4"
$gen.SigNamespacePrefix = "ds"
$gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
$gen.SigValueId = "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue"
$gen.SignedInfoCanonAlg = "C14N"
$gen.SignedInfoDigestMethod = "sha256"
# Create an Object to be added to the Signature.
$object1 = New-Object Chilkat.Xml
$object1.Tag = "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 = New-Object Chilkat.Http
$bd = New-Object Chilkat.BinData
$url = "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456"
$success = $http.QuickGetBd($url,$bd)
if ($success -ne $true) {
$($http.LastErrorText)
exit
}
# -------- 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 -ne $true) {
$($http.LastErrorText)
exit
}
$gen.AddExternalBinaryRef($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 -ne $true) {
$($http.LastErrorText)
exit
}
$gen.AddExternalBinaryRef($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 -ne $true) {
$($http.LastErrorText)
exit
}
$gen.AddExternalBinaryRef($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 = New-Object Chilkat.Cert
$success = $cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if ($success -ne $true) {
$($cert.LastErrorText)
exit
}
$gen.SetX509Cert($cert,$true)
$gen.KeyInfoType = "X509Data"
$gen.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.
$sbXml = New-Object Chilkat.StringBuilder
$gen.Behaviors = "IndentedSignature"
# Sign the XML...
$success = $gen.CreateXmlDSigSb($sbXml)
if ($success -ne $true) {
$($gen.LastErrorText)
exit
}
# -----------------------------------------------
# Save the signed XML to a file.
$success = $sbXml.WriteFile("qa_output/signedXml.xml","utf-8",$false)
$($sbXml.GetAsString())
# ----------------------------------------
# Verify the signature we just produced...
$verifier = New-Object Chilkat.XmlDSig
$success = $verifier.LoadSignatureSb($sbXml)
if ($success -ne $true) {
$($verifier.LastErrorText)
exit
}
$verified = $verifier.VerifySignature($true)
if ($verified -ne $true) {
$($verifier.LastErrorText)
exit
}
$("This signature was successfully verified.")