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(Delphi DLL) 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, XmlDSigGen, XmlDSig, StringBuilder, BinData, Cert, Http, Xml; ... procedure TForm1.Button1Click(Sender: TObject); var success: Boolean; gen: HCkXmlDSigGen; object1: HCkXml; http: HCkHttp; bd: HCkBinData; url: PWideChar; cert: HCkCert; sbXml: HCkStringBuilder; verifier: HCkXmlDSig; verified: Boolean; 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 := True; gen := CkXmlDSigGen_Create(); CkXmlDSigGen_putSigLocation(gen,''); CkXmlDSigGen_putSigLocationMod(gen,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. CkXmlDSigGen_putSigId(gen,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4'); CkXmlDSigGen_putSigNamespacePrefix(gen,'ds'); CkXmlDSigGen_putSigNamespaceUri(gen,'http://www.w3.org/2000/09/xmldsig#'); CkXmlDSigGen_putSigValueId(gen,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue'); CkXmlDSigGen_putSignedInfoCanonAlg(gen,'C14N'); CkXmlDSigGen_putSignedInfoDigestMethod(gen,'sha256'); // Create an Object to be added to the Signature. object1 := CkXml_Create(); CkXml_putTag(object1,'xades:QualifyingProperties'); CkXml_AddAttribute(object1,'xmlns:xades','http://uri.etsi.org/01903/v1.3.2#'); CkXml_AddAttribute(object1,'xmlns:xades141','http://uri.etsi.org/01903/v1.4.1#'); CkXml_AddAttribute(object1,'Target','#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4'); CkXml_UpdateAttrAt(object1,'xades:SignedProperties',True,'Id','xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops'); CkXml_UpdateChildContent(object1,'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... CkXml_UpdateAttrAt(object1,'xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod',True,'Algorithm','http://www.w3.org/2001/04/xmlenc#sha256'); CkXml_UpdateChildContent(object1,'xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue','TO BE GENERATED BY CHILKAT'); CkXml_UpdateChildContent(object1,'xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2','TO BE GENERATED BY CHILKAT'); CkXmlDSigGen_AddObject(gen,'',CkXml__getXml(object1),'',''); http := CkHttp_Create(); bd := CkBinData_Create(); url := 'https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456'; success := CkHttp_QuickGetBd(http,url,bd); if (success <> True) then begin Memo1.Lines.Add(CkHttp__lastErrorText(http)); Exit; end; // -------- Reference 1 -------- CkXmlDSigGen_AddExternalBinaryRef(gen,url,bd,'sha256',''); CkXmlDSigGen_SetRefIdAttr(gen,url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0'); // -------- Reference 2 -------- CkBinData_Clear(bd); url := 'https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1'; success := CkHttp_QuickGetBd(http,url,bd); if (success <> True) then begin Memo1.Lines.Add(CkHttp__lastErrorText(http)); Exit; end; CkXmlDSigGen_AddExternalBinaryRef(gen,url,bd,'sha256',''); CkXmlDSigGen_SetRefIdAttr(gen,url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1'); // -------- Reference 3 -------- CkBinData_Clear(bd); url := 'https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1'; success := CkHttp_QuickGetBd(http,url,bd); if (success <> True) then begin Memo1.Lines.Add(CkHttp__lastErrorText(http)); Exit; end; CkXmlDSigGen_AddExternalBinaryRef(gen,url,bd,'sha256',''); CkXmlDSigGen_SetRefIdAttr(gen,url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2'); // -------- Reference 4 -------- CkBinData_Clear(bd); url := 'https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1'; success := CkHttp_QuickGetBd(http,url,bd); if (success <> True) then begin Memo1.Lines.Add(CkHttp__lastErrorText(http)); Exit; end; CkXmlDSigGen_AddExternalBinaryRef(gen,url,bd,'sha256',''); CkXmlDSigGen_SetRefIdAttr(gen,url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3'); // -------- Reference 5 -------- CkXmlDSigGen_AddObjectRef(gen,'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 := CkCert_Create(); success := CkCert_LoadPfxFile(cert,'qa_data/pfx/cert_test123.pfx','test123'); if (success <> True) then begin Memo1.Lines.Add(CkCert__lastErrorText(cert)); Exit; end; CkXmlDSigGen_SetX509Cert(gen,cert,True); CkXmlDSigGen_putKeyInfoType(gen,'X509Data'); CkXmlDSigGen_putX509Type(gen,'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 := CkStringBuilder_Create(); CkXmlDSigGen_putBehaviors(gen,'IndentedSignature'); // Sign the XML... success := CkXmlDSigGen_CreateXmlDSigSb(gen,sbXml); if (success <> True) then begin Memo1.Lines.Add(CkXmlDSigGen__lastErrorText(gen)); Exit; end; // ----------------------------------------------- // Save the signed XML to a file. success := CkStringBuilder_WriteFile(sbXml,'qa_output/signedXml.xml','utf-8',False); Memo1.Lines.Add(CkStringBuilder__getAsString(sbXml)); // ---------------------------------------- // Verify the signature we just produced... verifier := CkXmlDSig_Create(); success := CkXmlDSig_LoadSignatureSb(verifier,sbXml); if (success <> True) then begin Memo1.Lines.Add(CkXmlDSig__lastErrorText(verifier)); Exit; end; verified := CkXmlDSig_VerifySignature(verifier,True); if (verified <> True) then begin Memo1.Lines.Add(CkXmlDSig__lastErrorText(verifier)); Exit; end; Memo1.Lines.Add('This signature was successfully verified.'); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); CkCert_Dispose(cert); CkStringBuilder_Dispose(sbXml); CkXmlDSig_Dispose(verifier); end; |
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