(DataFlex) XAdES using TSA Requiring Client Certificate

See more XML Digital Signatures Examples

Demonstrates how to create an XMLDSig (XAdES) signed document which includes an EncapsulatedTimestamp using a TSA (TimeStamp Authority) server requiring client certificate authentication. One such TSA is https://www3.postsignum.cz/TSS/TSS_crt/

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Variant vSbXml
    Handle hoSbXml
    Handle hoGen
    Handle hoObject1
    Variant vCert
    Handle hoCert
    Variant vJsonTsa
    Handle hoJsonTsa
    Variant vHttp
    Handle hoHttp
    String sTemp1

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Move True To iSuccess

    // Load the XML to be signed.  For example, the XML to be signed might contain something like this:

    // <?xml version="1.0" encoding="utf-8"?>
    // <TransakcniLogSystemu xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://nsess.public.cz/erms_trans/v_01_01" Id="Signature1">
    //   <TransLogInfo>
    //     <Identifikator>XYZ ABC</Identifikator>
    //     <DatumVzniku>2022-12-20T14:39:02.3625922+01:00</DatumVzniku>
    //     <DatumCasOd>2022-12-20T14:26:26.88</DatumCasOd>
    //     <DatumCasDo>2022-12-20T14:39:02.287</DatumCasDo>
    //     <Software>XYZ</Software>
    //     <VerzeSoftware>2.0.19.32</VerzeSoftware>
    //   </TransLogInfo>
    //   <Udalosti>
    //     <Udalost>
    //       <Poradi>1</Poradi>
    // ...

    // Load the XML to be signed from a file.
    // (XML can be loaded from other source, such as a string variable.)
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbXml
    If (Not(IsComObjectCreated(hoSbXml))) Begin
        Send CreateComObject of hoSbXml
    End
    Get ComLoadFile Of hoSbXml "xmlToSign.xml" "utf-8" To iSuccess

    Get Create (RefClass(cComChilkatXmlDSigGen)) To hoGen
    If (Not(IsComObjectCreated(hoGen))) Begin
        Send CreateComObject of hoGen
    End

    Set ComSigLocation Of hoGen To "TransakcniLogSystemu"
    Set ComSigLocationMod Of hoGen To 0
    Set ComSigId Of hoGen To "SignatureID-Signature1"
    Set ComSigNamespacePrefix Of hoGen To "ds"
    Set ComSigNamespaceUri Of hoGen To "http://www.w3.org/2000/09/xmldsig#"
    Set ComSignedInfoCanonAlg Of hoGen To "C14N"
    Set ComSignedInfoDigestMethod Of hoGen To "sha256"

    // Set the KeyInfoId before adding references..
    Set ComKeyInfoId Of hoGen To "KeyInfoId-Signature-Signature1"

    // Create an Object to be added to the Signature.

    // Note: Chilkat will automatically fill in the values marked as "TO BE GENERATED BY CHILKAT" at the time of signing.
    // The EncapsulatedTimestamp will be automatically generated.

    Get Create (RefClass(cComChilkatXml)) To hoObject1
    If (Not(IsComObjectCreated(hoObject1))) Begin
        Send CreateComObject of hoObject1
    End
    Set ComTag Of hoObject1 To "xades:QualifyingProperties"
    Get ComAddAttribute Of hoObject1 "xmlns:xades" "http://uri.etsi.org/01903/v1.3.2#" To iSuccess
    Get ComAddAttribute Of hoObject1 "Target" "#Signature1" To iSuccess

    Get ComUpdateAttrAt Of hoObject1 "xades:SignedProperties" True "Id" "SignedProperties-Signature-Signature1" To iSuccess
    Send ComUpdateChildContent To hoObject1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime" "TO BE GENERATED BY CHILKAT"
    Get ComUpdateAttrAt Of hoObject1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod" True "Algorithm" "http://www.w3.org/2001/04/xmlenc#sha256" To iSuccess
    Send ComUpdateChildContent To hoObject1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue" "TO BE GENERATED BY CHILKAT"
    Send ComUpdateChildContent To hoObject1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2" "TO BE GENERATED BY CHILKAT"

    // The EncapsulatedTimestamp will be included in the unsigned properties.
    Get ComUpdateAttrAt Of hoObject1 "xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp" True "Id" "signature-timestamp-5561-8212-3316-5191" To iSuccess
    Get ComUpdateAttrAt Of hoObject1 "xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|ds:CanonicalizationMethod" True "Algorithm" "http://www.w3.org/2001/10/xml-exc-c14n#" To iSuccess
    Get ComUpdateAttrAt Of hoObject1 "xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|xades:EncapsulatedTimeStamp" True "Encoding" "http://uri.etsi.org/01903/v1.2.2#DER" To iSuccess
    Send ComUpdateChildContent To hoObject1 "xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|xades:EncapsulatedTimeStamp" "TO BE GENERATED BY CHILKAT"

    Get ComGetXml Of hoObject1 To sTemp1
    Get ComAddObject Of hoGen "XadesObjectId-Signature1" sTemp1 "" "" To iSuccess

    // -------- Reference 1 --------
    Get ComAddObjectRef Of hoGen "SignedProperties-Signature-Signature1" "sha256" "EXCL_C14N" "" "http://uri.etsi.org/01903#SignedProperties" To iSuccess

    // -------- Reference 2 --------
    Get ComAddSameDocRef Of hoGen "KeyInfoId-Signature-Signature1" "sha256" "EXCL_C14N" "" "" To iSuccess
    Get ComSetRefIdAttr Of hoGen "KeyInfoId-Signature-Signature1" "ReferenceKeyInfo" To iSuccess

    // -------- Reference 3 --------
    Get ComAddSameDocRef Of hoGen "" "sha256" "EXCL_C14N" "" "" To iSuccess
    Get ComSetRefIdAttr Of hoGen "" "Reference-Signature1" To iSuccess

    // Provide a certificate + private key. (PFX password is test123)
    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End
    Get ComLoadPfxFile Of hoCert "qa_data/pfx/cert_test123.pfx" "test123" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoCert To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get pvComObject of hoCert to vCert
    Get ComSetX509Cert Of hoGen vCert True To iSuccess

    Set ComKeyInfoType Of hoGen To "X509Data"
    Set ComX509Type Of hoGen To "Certificate"

    Set ComBehaviors Of hoGen To "IndentedSignature"

    // -------------------------------------------------------------------------------------------
    // To have the EncapsulatedTimeStamp automatically added... 
    // 1) Add the <xades:EncapsulatedTimeStamp Encoding="http://uri.etsi.org/01903/v1.2.2#DER">TO BE GENERATED BY CHILKAT</xades:EncapsulatedTimeStamp>
    //    to the unsigned properties.  (This was accomplished in the above code.)
    // 2) Specify the TSA URL (Timestamping Authority URL).
    //    Here we specify the TSA URL:
    // -------------------------------------------------------------------------------------------

    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonTsa
    If (Not(IsComObjectCreated(hoJsonTsa))) Begin
        Send CreateComObject of hoJsonTsa
    End
    Get ComUpdateString Of hoJsonTsa "timestampToken.tsaUrl" "https://www3.postsignum.cz/TSS/TSS_crt/" To iSuccess
    Get ComUpdateBool Of hoJsonTsa "timestampToken.requestTsaCert" True To iSuccess
    Get pvComObject of hoJsonTsa to vJsonTsa
    Get ComSetTsa Of hoGen vJsonTsa To iSuccess

    // -------------------------------------------------------------------------------------------
    // In this case, the TSA requires client certificate authentication.
    // To provide your client certificate, the application will instantiate a Chilkat HTTP object,
    // then set it up with a SSL/TLS client certificate, and then tell the XmlDSigGen object
    // to use the HTTP object for connections to the TSA server.
    // -------------------------------------------------------------------------------------------
    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End
    Get ComSetSslClientCertPfx Of hoHttp "/home/bob/pfxFiles/myClientSideCertWithPrivateKey.pfx" "pfxPassword" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Tell the XmlDSigGen object to use the above HTTP object for TSA communications.
    Get pvComObject of hoHttp to vHttp
    Send ComSetHttpObj To hoGen vHttp

    // Sign the XML...
    Get pvComObject of hoSbXml to vSbXml
    Get ComCreateXmlDSigSb Of hoGen vSbXml To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoGen To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // -----------------------------------------------

    // Save the signed XML to a file.
    Get ComWriteFile Of hoSbXml "c:/temp/qa_output/signedXml.xml" "utf-8" False To iSuccess

    Get ComGetAsString Of hoSbXml To sTemp1
    Showln sTemp1


End_Procedure