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(Visual FoxPro) XML Signature Multiple External ReferencesDemonstrates how to add multiple external references to an XML digital signature.
LOCAL lnSuccess LOCAL loGen LOCAL loObject1 LOCAL loHttp LOCAL loBd LOCAL lcUrl LOCAL loCert LOCAL loSbXml LOCAL loVerifier LOCAL lnVerified * 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> * lnSuccess = 1 * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.XmlDSigGen') loGen = CreateObject('Chilkat.XmlDSigGen') loGen.SigLocation = "" loGen.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. loGen.SigId = "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4" loGen.SigNamespacePrefix = "ds" loGen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#" loGen.SigValueId = "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue" loGen.SignedInfoCanonAlg = "C14N" loGen.SignedInfoDigestMethod = "sha256" * Create an Object to be added to the Signature. * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Xml') loObject1 = CreateObject('Chilkat.Xml') loObject1.Tag = "xades:QualifyingProperties" loObject1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#") loObject1.AddAttribute("xmlns:xades141","http://uri.etsi.org/01903/v1.4.1#") loObject1.AddAttribute("Target","#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4") loObject1.UpdateAttrAt("xades:SignedProperties",1,"Id","xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops") loObject1.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... loObject1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod",1,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT") loObject1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestMethod",1,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT") loObject1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestMethod",1,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT") loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT") loGen.AddObject("",loObject1.GetXml(),"","") * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http') loHttp = CreateObject('Chilkat.Http') * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData') loBd = CreateObject('Chilkat.BinData') lcUrl = "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456" lnSuccess = loHttp.QuickGetBd(lcUrl,loBd) IF (lnSuccess <> 1) THEN ? loHttp.LastErrorText RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd CANCEL ENDIF * -------- Reference 1 -------- loGen.AddExternalBinaryRef(lcUrl,loBd,"sha256","") loGen.SetRefIdAttr(lcUrl,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0") * -------- Reference 2 -------- loBd.Clear() lcUrl = "https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1" lnSuccess = loHttp.QuickGetBd(lcUrl,loBd) IF (lnSuccess <> 1) THEN ? loHttp.LastErrorText RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd CANCEL ENDIF loGen.AddExternalBinaryRef(lcUrl,loBd,"sha256","") loGen.SetRefIdAttr(lcUrl,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1") * -------- Reference 3 -------- loBd.Clear() lcUrl = "https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1" lnSuccess = loHttp.QuickGetBd(lcUrl,loBd) IF (lnSuccess <> 1) THEN ? loHttp.LastErrorText RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd CANCEL ENDIF loGen.AddExternalBinaryRef(lcUrl,loBd,"sha256","") loGen.SetRefIdAttr(lcUrl,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2") * -------- Reference 4 -------- loBd.Clear() lcUrl = "https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1" lnSuccess = loHttp.QuickGetBd(lcUrl,loBd) IF (lnSuccess <> 1) THEN ? loHttp.LastErrorText RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd CANCEL ENDIF loGen.AddExternalBinaryRef(lcUrl,loBd,"sha256","") loGen.SetRefIdAttr(lcUrl,"xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3") * -------- Reference 5 -------- loGen.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) * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Cert') loCert = CreateObject('Chilkat.Cert') lnSuccess = loCert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123") IF (lnSuccess <> 1) THEN ? loCert.LastErrorText RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd RELEASE loCert CANCEL ENDIF loGen.SetX509Cert(loCert,1) loGen.KeyInfoType = "X509Data" loGen.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. * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder') loSbXml = CreateObject('Chilkat.StringBuilder') loGen.Behaviors = "IndentedSignature" * Sign the XML... lnSuccess = loGen.CreateXmlDSigSb(loSbXml) IF (lnSuccess <> 1) THEN ? loGen.LastErrorText RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd RELEASE loCert RELEASE loSbXml CANCEL ENDIF * ----------------------------------------------- * Save the signed XML to a file. lnSuccess = loSbXml.WriteFile("qa_output/signedXml.xml","utf-8",0) ? loSbXml.GetAsString() * ---------------------------------------- * Verify the signature we just produced... * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.XmlDSig') loVerifier = CreateObject('Chilkat.XmlDSig') lnSuccess = loVerifier.LoadSignatureSb(loSbXml) IF (lnSuccess <> 1) THEN ? loVerifier.LastErrorText RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd RELEASE loCert RELEASE loSbXml RELEASE loVerifier CANCEL ENDIF lnVerified = loVerifier.VerifySignature(1) IF (lnVerified <> 1) THEN ? loVerifier.LastErrorText RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd RELEASE loCert RELEASE loSbXml RELEASE loVerifier CANCEL ENDIF ? "This signature was successfully verified." RELEASE loGen RELEASE loObject1 RELEASE loHttp RELEASE loBd RELEASE loCert RELEASE loSbXml RELEASE loVerifier |
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