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(PureBasic) Create XAdES using Smart Card or USB Token

Demonstrates how to create an XAdES signed XML document using a certificate located on a smartcard or USB token.

Note: This example requires Chilkat v9.5.0.75 or greater. Also, at the time of this writing this example is restricted to the Windows operating system.

Chilkat PureBasic Module Download

Chilkat PureBasic Module

IncludeFile "CkCert.pb"
IncludeFile "CkXml.pb"
IncludeFile "CkXmlDSigGen.pb"
IncludeFile "CkXmlDSig.pb"
IncludeFile "CkStringBuilder.pb"

Procedure ChilkatExample()

    ; ----------------------------------------------------------------------
    ; IMPORTANT: This generated example requires Chilkat v9.5.0.75 or later.
    ; Contact support@chilkatsoft.com for a pre-release.
    ; ----------------------------------------------------------------------

    ; Load the XML to be signed.
    xmlToSign.i = CkXml::ckCreate()
    If xmlToSign.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkXml::ckLoadXmlFile(xmlToSign,"qa_data/fattura_electronica/docToSign.xml")
    If success <> 1
        Debug CkXml::ckLastErrorText(xmlToSign)
        CkXml::ckDispose(xmlToSign)
        ProcedureReturn
    EndIf

    gen.i = CkXmlDSigGen::ckCreate()
    If gen.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXmlDSigGen::setCkSigLocation(gen, "p:FatturaElettronica")
    CkXmlDSigGen::setCkSigId(gen, "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504")
    CkXmlDSigGen::setCkSigNamespacePrefix(gen, "ds")
    CkXmlDSigGen::setCkSigNamespaceUri(gen, "http://www.w3.org/2000/09/xmldsig#")
    CkXmlDSigGen::setCkSigValueId(gen, "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-sigvalue")
    CkXmlDSigGen::setCkSignedInfoCanonAlg(gen, "C14N")
    CkXmlDSigGen::setCkSignedInfoDigestMethod(gen, "sha256")

    ; Create an Object to be added to the Signature.
    ; Note: Chilkat will automatically populate the strings indicated by "TO BE GENERATED BY CHILKAT" with actual/correct values
    ; when the XML is signed.
    object1.i = CkXml::ckCreate()
    If object1.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::setCkTag(object1, "xades:QualifyingProperties")
    CkXml::ckAddAttribute(object1,"xmlns:xades","http://uri.etsi.org/01903/v1.3.2#")
    CkXml::ckAddAttribute(object1,"xmlns:xades141","http://uri.etsi.org/01903/v1.4.1#")
    CkXml::ckAddAttribute(object1,"Target","#xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504")
    CkXml::ckUpdateAttrAt(object1,"xades:SignedProperties",1,"Id","xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-signedprops")
    CkXml::ckUpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime","TO BE GENERATED BY CHILKAT")
    CkXml::ckUpdateAttrAt(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod",1,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256")
    CkXml::ckUpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT")
    CkXml::ckUpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT")
    CkXml::ckUpdateChildContent(object1,"xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT")

    CkXmlDSigGen::ckAddObject(gen,"",CkXml::ckGetXml(object1),"","")

    ; -------- Reference 1 --------
    CkXmlDSigGen::setCkKeyInfoId(gen, "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-keyinfo")
    CkXmlDSigGen::ckAddSameDocRef(gen,"xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-keyinfo","sha256","","","")

    ; -------- Reference 2 --------
    CkXmlDSigGen::ckAddSameDocRef(gen,"","sha256","","","")
    CkXmlDSigGen::ckSetRefIdAttr(gen,"","xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-ref0")

    ; -------- Reference 3 --------
    CkXmlDSigGen::ckAddObjectRef(gen,"xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-signedprops","sha256","","","http://uri.etsi.org/01903#SignedProperties")

    ; ----------------------------------------------------------------
    ;  Load a certificate that has been pre-installed on the Windows system
    ;  This includes certificates on smartcards and USB tokens
    cert.i = CkCert::ckCreate()
    If cert.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Load the certificate on the smartcard currently in the reader (or on the USB token).
    ; Pass an empty string to allow Chilkat to automatically choose the CSP (Cryptographi Service Provider).
    ; See Load Certificate on Smartcard for information about explicitly selecting a particular CSP.
    success = CkCert::ckLoadFromSmartcard(cert,"")
    If success <> 1
        Debug CkCert::ckLastErrorText(cert)
        CkXml::ckDispose(xmlToSign)
        CkXmlDSigGen::ckDispose(gen)
        CkXml::ckDispose(object1)
        CkCert::ckDispose(cert)
        ProcedureReturn
    EndIf

    ;  You may provide the PIN here.  Otherwise Windows will display a PIN dialog.
    CkCert::setCkSmartCardPin(cert, "000000")

    CkXmlDSigGen::ckSetX509Cert(gen,cert,1)
    CkXmlDSigGen::setCkKeyInfoType(gen, "X509Data")
    CkXmlDSigGen::setCkX509Type(gen, "Certificate")

    ; Load XML to be signed...
    sbXml.i = CkStringBuilder::ckCreate()
    If sbXml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::ckGetXmlSb(xmlToSign,sbXml)

    CkXmlDSigGen::setCkBehaviors(gen, "IndentedSignature,ForceAddEnvelopedSignatureTransform")

    ; Sign the XML...
    success = CkXmlDSigGen::ckCreateXmlDSigSb(gen,sbXml)
    If success <> 1
        Debug CkXmlDSigGen::ckLastErrorText(gen)
        CkXml::ckDispose(xmlToSign)
        CkXmlDSigGen::ckDispose(gen)
        CkXml::ckDispose(object1)
        CkCert::ckDispose(cert)
        CkStringBuilder::ckDispose(sbXml)
        ProcedureReturn
    EndIf

    ; Save the signed XMl to a file.
    success = CkStringBuilder::ckWriteFile(sbXml,"qa_output/signedXml.xml","utf-8",0)

    Debug CkStringBuilder::ckGetAsString(sbXml)

    ; ----------------------------------------
    ; Verify the signature we just produced...
    verifier.i = CkXmlDSig::ckCreate()
    If verifier.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success = CkXmlDSig::ckLoadSignatureSb(verifier,sbXml)
    If success <> 1
        Debug CkXmlDSig::ckLastErrorText(verifier)
        CkXml::ckDispose(xmlToSign)
        CkXmlDSigGen::ckDispose(gen)
        CkXml::ckDispose(object1)
        CkCert::ckDispose(cert)
        CkStringBuilder::ckDispose(sbXml)
        CkXmlDSig::ckDispose(verifier)
        ProcedureReturn
    EndIf

    verified.i = CkXmlDSig::ckVerifySignature(verifier,1)
    If verified <> 1
        Debug CkXmlDSig::ckLastErrorText(verifier)
        CkXml::ckDispose(xmlToSign)
        CkXmlDSigGen::ckDispose(gen)
        CkXml::ckDispose(object1)
        CkCert::ckDispose(cert)
        CkStringBuilder::ckDispose(sbXml)
        CkXmlDSig::ckDispose(verifier)
        ProcedureReturn
    EndIf

    Debug "This signature was successfully verified."


    CkXml::ckDispose(xmlToSign)
    CkXmlDSigGen::ckDispose(gen)
    CkXml::ckDispose(object1)
    CkCert::ckDispose(cert)
    CkStringBuilder::ckDispose(sbXml)
    CkXmlDSig::ckDispose(verifier)


    ProcedureReturn
EndProcedure

 

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