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(C) XML Signature Multiple External ReferencesDemonstrates how to add multiple external references to an XML digital signature.
#include <C_CkXmlDSigGen.h> #include <C_CkXml.h> #include <C_CkHttp.h> #include <C_CkBinData.h> #include <C_CkCert.h> #include <C_CkStringBuilder.h> #include <C_CkXmlDSig.h> void ChilkatSample(void) { BOOL success; HCkXmlDSigGen gen; HCkXml object1; HCkHttp http; HCkBinData bd; const char *url; HCkCert cert; HCkStringBuilder sbXml; HCkXmlDSig verifier; BOOL verified; // 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:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod",TRUE,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT"); CkXml_UpdateAttrAt(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestMethod",TRUE,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT"); CkXml_UpdateAttrAt(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestMethod",TRUE,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT"); CkXml_UpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509SerialNumber","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) { printf("%s\n",CkHttp_lastErrorText(http)); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); return; } // -------- 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) { printf("%s\n",CkHttp_lastErrorText(http)); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); return; } 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) { printf("%s\n",CkHttp_lastErrorText(http)); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); return; } 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) { printf("%s\n",CkHttp_lastErrorText(http)); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); return; } 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) { printf("%s\n",CkCert_lastErrorText(cert)); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); CkCert_Dispose(cert); return; } 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) { printf("%s\n",CkXmlDSigGen_lastErrorText(gen)); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); CkCert_Dispose(cert); CkStringBuilder_Dispose(sbXml); return; } // ----------------------------------------------- // Save the signed XML to a file. success = CkStringBuilder_WriteFile(sbXml,"qa_output/signedXml.xml","utf-8",FALSE); printf("%s\n",CkStringBuilder_getAsString(sbXml)); // ---------------------------------------- // Verify the signature we just produced... verifier = CkXmlDSig_Create(); success = CkXmlDSig_LoadSignatureSb(verifier,sbXml); if (success != TRUE) { printf("%s\n",CkXmlDSig_lastErrorText(verifier)); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); CkCert_Dispose(cert); CkStringBuilder_Dispose(sbXml); CkXmlDSig_Dispose(verifier); return; } verified = CkXmlDSig_VerifySignature(verifier,TRUE); if (verified != TRUE) { printf("%s\n",CkXmlDSig_lastErrorText(verifier)); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); CkCert_Dispose(cert); CkStringBuilder_Dispose(sbXml); CkXmlDSig_Dispose(verifier); return; } printf("This signature was successfully verified.\n"); CkXmlDSigGen_Dispose(gen); CkXml_Dispose(object1); CkHttp_Dispose(http); CkBinData_Dispose(bd); CkCert_Dispose(cert); CkStringBuilder_Dispose(sbXml); CkXmlDSig_Dispose(verifier); } |
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