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(CkPython) XML Signature Multiple External ReferencesDemonstrates how to add multiple external references to an XML digital signature.
import sys import chilkat # 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.CkXmlDSigGen() gen.put_SigLocation("") gen.put_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.put_SigId("xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4") gen.put_SigNamespacePrefix("ds") gen.put_SigNamespaceUri("http://www.w3.org/2000/09/xmldsig#") gen.put_SigValueId("xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue") gen.put_SignedInfoCanonAlg("C14N") gen.put_SignedInfoDigestMethod("sha256") # Create an Object to be added to the Signature. object1 = chilkat.CkXml() object1.put_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:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod",True,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT") object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestMethod",True,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT") object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestMethod",True,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT") object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT") gen.AddObject("",object1.getXml(),"","") http = chilkat.CkHttp() bd = chilkat.CkBinData() url = "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456" success = http.QuickGetBd(url,bd) if (success != True): print(http.lastErrorText()) sys.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 != True): print(http.lastErrorText()) sys.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 != True): print(http.lastErrorText()) sys.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 != True): print(http.lastErrorText()) sys.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 = chilkat.CkCert() success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123") if (success != True): print(cert.lastErrorText()) sys.exit() gen.SetX509Cert(cert,True) gen.put_KeyInfoType("X509Data") gen.put_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 = chilkat.CkStringBuilder() gen.put_Behaviors("IndentedSignature") # Sign the XML... success = gen.CreateXmlDSigSb(sbXml) if (success != True): print(gen.lastErrorText()) sys.exit() # ----------------------------------------------- # Save the signed XML to a file. success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",False) print(sbXml.getAsString()) # ---------------------------------------- # Verify the signature we just produced... verifier = chilkat.CkXmlDSig() success = verifier.LoadSignatureSb(sbXml) if (success != True): print(verifier.lastErrorText()) sys.exit() verified = verifier.VerifySignature(True) if (verified != True): print(verifier.lastErrorText()) sys.exit() print("This signature was successfully verified.") |
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