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(Delphi ActiveX) XML Signature Multiple External ReferencesDemonstrates how to add multiple external references to an XML digital signature.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB; ... procedure TForm1.Button1Click(Sender: TObject); var success: Integer; gen: TChilkatXmlDSigGen; object1: TChilkatXml; http: TChilkatHttp; bd: TChilkatBinData; url: WideString; cert: TChilkatCert; sbXml: TChilkatStringBuilder; verifier: TChilkatXmlDSig; verified: Integer; begin // 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 := 1; gen := TChilkatXmlDSigGen.Create(Self); 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 := TChilkatXml.Create(Self); 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',1,'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',1,'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 := TChilkatHttp.Create(Self); bd := TChilkatBinData.Create(Self); url := 'https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456'; success := http.QuickGetBd(url,bd.ControlInterface); if (success <> 1) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; // -------- Reference 1 -------- gen.AddExternalBinaryRef(url,bd.ControlInterface,'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.ControlInterface); if (success <> 1) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; gen.AddExternalBinaryRef(url,bd.ControlInterface,'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.ControlInterface); if (success <> 1) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; gen.AddExternalBinaryRef(url,bd.ControlInterface,'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.ControlInterface); if (success <> 1) then begin Memo1.Lines.Add(http.LastErrorText); Exit; end; gen.AddExternalBinaryRef(url,bd.ControlInterface,'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 := TChilkatCert.Create(Self); success := cert.LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123'); if (success <> 1) then begin Memo1.Lines.Add(cert.LastErrorText); Exit; end; gen.SetX509Cert(cert.ControlInterface,1); 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 := TChilkatStringBuilder.Create(Self); gen.Behaviors := 'IndentedSignature'; // Sign the XML... success := gen.CreateXmlDSigSb(sbXml.ControlInterface); if (success <> 1) then begin Memo1.Lines.Add(gen.LastErrorText); Exit; end; // ----------------------------------------------- // Save the signed XML to a file. success := sbXml.WriteFile('qa_output/signedXml.xml','utf-8',0); Memo1.Lines.Add(sbXml.GetAsString()); // ---------------------------------------- // Verify the signature we just produced... verifier := TChilkatXmlDSig.Create(Self); success := verifier.LoadSignatureSb(sbXml.ControlInterface); if (success <> 1) then begin Memo1.Lines.Add(verifier.LastErrorText); Exit; end; verified := verifier.VerifySignature(1); if (verified <> 1) then begin Memo1.Lines.Add(verifier.LastErrorText); Exit; end; Memo1.Lines.Add('This signature was successfully verified.'); end; |
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