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(C++) XML Signature Multiple External ReferencesDemonstrates how to add multiple external references to an XML digital signature.
#include <CkXmlDSigGen.h> #include <CkXml.h> #include <CkHttp.h> #include <CkBinData.h> #include <CkCert.h> #include <CkStringBuilder.h> #include <CkXmlDSig.h> void ChilkatSample(void) { // 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> // bool success = true; CkXmlDSigGen gen; 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. CkXml object1; 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: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(),"",""); CkHttp http; CkBinData bd; const char *url = "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456"; success = http.QuickGetBd(url,bd); if (success != true) { std::cout << http.lastErrorText() << "\r\n"; return; } // -------- 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) { std::cout << http.lastErrorText() << "\r\n"; return; } 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) { std::cout << http.lastErrorText() << "\r\n"; return; } 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) { std::cout << http.lastErrorText() << "\r\n"; return; } 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) CkCert cert; success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123"); if (success != true) { std::cout << cert.lastErrorText() << "\r\n"; return; } 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. CkStringBuilder sbXml; gen.put_Behaviors("IndentedSignature"); // Sign the XML... success = gen.CreateXmlDSigSb(sbXml); if (success != true) { std::cout << gen.lastErrorText() << "\r\n"; return; } // ----------------------------------------------- // Save the signed XML to a file. success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",false); std::cout << sbXml.getAsString() << "\r\n"; // ---------------------------------------- // Verify the signature we just produced... CkXmlDSig verifier; success = verifier.LoadSignatureSb(sbXml); if (success != true) { std::cout << verifier.lastErrorText() << "\r\n"; return; } bool verified = verifier.VerifySignature(true); if (verified != true) { std::cout << verifier.lastErrorText() << "\r\n"; return; } std::cout << "This signature was successfully verified." << "\r\n"; } |
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