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Visual FoxPro

Create XAdES-T Signed XML

See more XAdES Examples

This example signs XML using the XAdES-T profile. XAdES-T is a profile within the XAdES standard that adds support for secure timestamping of signatures.

Secure timestamping involves adding a timestamp to the signature, indicating the exact time when the signature was applied.

Timestamping enhances the long-term validity of signatures by providing evidence that the signature existed at a specific point in time, even if the signer's certificate has expired or been revoked.

XAdES-T signatures include elements for embedding timestamp data within the XML signature, along with information about the timestamp authority and the timestamp verification process.

XAdES-T signatures are suitable for scenarios where long-term validity and integrity of signatures are essential, such as in legal and regulatory contexts where archived documents may need to be validated years or decades later.

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LOCAL lnSuccess
LOCAL loXmlToSign
LOCAL loGen
LOCAL loObject1
LOCAL loObject2
LOCAL loCert
LOCAL loJsonTsa
LOCAL loSbXml
LOCAL loVerifier
LOCAL lnNumSigs
LOCAL lnVerifyIdx
LOCAL lnVerified

lnSuccess = 0

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

lnSuccess = 1
* Create the XML to be signed...

* Use this online tool to generate code from sample XML: 
* Generate Code to Create XML

* <?xml version="1.0" encoding="UTF-8"?>
* <es:Dossier xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns="http://uri.etsi.org/01903/v1.3.2#" xmlns:es="https://www.microsec.hu/ds/e-szigno30#" xsi:schemaLocation="https://www.microsec.hu/ds/e-szigno30# https://www.microsec.hu/ds/e-szigno30.xsd">
* 	<es:DossierProfile Id="PObject0" OBJREF="Object0">
* 	<es:Title>e-akta.es3</es:Title>
* 	<es:E-category>electronic dossier</es:E-category>
* 	<es:CreationDate>2022-12-02T07:55:16Z</es:CreationDate>
* 	</es:DossierProfile>
* 	<es:Documents Id="Object0"/>
* </es:Dossier>

loXmlToSign = CreateObject('Chilkat.Xml')
loXmlToSign.Tag = "es:Dossier"
loXmlToSign.AddAttribute("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance")
loXmlToSign.AddAttribute("xmlns:ds","http://www.w3.org/2000/09/xmldsig#")
loXmlToSign.AddAttribute("xmlns","http://uri.etsi.org/01903/v1.3.2#")
loXmlToSign.AddAttribute("xmlns:es","https://www.microsec.hu/ds/e-szigno30#")
loXmlToSign.AddAttribute("xsi:schemaLocation","https://www.microsec.hu/ds/e-szigno30# https://www.microsec.hu/ds/e-szigno30.xsd")
loXmlToSign.UpdateAttrAt("es:DossierProfile",1,"Id","PObject0")
loXmlToSign.UpdateAttrAt("es:DossierProfile",1,"OBJREF","Object0")
loXmlToSign.UpdateChildContent("es:DossierProfile|es:Title","e-akta.es3")
loXmlToSign.UpdateChildContent("es:DossierProfile|es:E-category","electronic dossier")
loXmlToSign.UpdateChildContent("es:DossierProfile|es:CreationDate","2022-12-02T07:55:16Z")
loXmlToSign.UpdateAttrAt("es:Documents",1,"Id","Object0")

loGen = CreateObject('Chilkat.XmlDSigGen')

loGen.SigLocation = "es:Dossier"
loGen.SigLocationMod = 0
loGen.SigId = "S9fe8096e-2cac-415d-9222-f6cf2ecb314b"
loGen.SigValueId = "VS9fe8096e-2cac-415d-9222-f6cf2ecb314b"
loGen.SignedInfoId = "SIS9fe8096e-2cac-415d-9222-f6cf2ecb314b"
loGen.SignedInfoCanonAlg = "EXCL_C14N"
loGen.SignedInfoDigestMethod = "sha256"

* Set the KeyInfoId before adding references..
loGen.KeyInfoId = "KS9fe8096e-2cac-415d-9222-f6cf2ecb314b"

* Create an Object to be added to the Signature.
loObject1 = CreateObject('Chilkat.Xml')
loObject1.Tag = "es:SignatureProfile"
loObject1.AddAttribute("Id","PS9fe8096e-2cac-415d-9222-f6cf2ecb314b")
loObject1.AddAttribute("OBJREF","Object0")
loObject1.AddAttribute("SIGREF","S9fe8096e-2cac-415d-9222-f6cf2ecb314b")
loObject1.AddAttribute("SIGREFLIST","#Object0 #PS9fe8096e-2cac-415d-9222-f6cf2ecb314b #PObject0 #XS9fe8096e-2cac-415d-9222-f6cf2ecb314b")
loObject1.UpdateChildContent("es:SignerName","EC Minősített-Tesztelő Péterke")
loObject1.UpdateChildContent("es:SDPresented","false")
loObject1.UpdateChildContent("es:Type","signature")
loObject1.UpdateAttrAt("es:Generator|es:Program",1,"name","e-Szigno")
loObject1.UpdateAttrAt("es:Generator|es:Program",1,"version","3.3.6.8")
loObject1.UpdateAttrAt("es:Generator|es:Device",1,"name","OpenSSL 1.1.1n  15 Mar 2022")
loObject1.UpdateAttrAt("es:Generator|es:Device",1,"type","")

loGen.AddObject("O1S9fe8096e-2cac-415d-9222-f6cf2ecb314b",loObject1.GetXml(),"","")

* Create an Object to be added to the Signature.
loObject2 = CreateObject('Chilkat.Xml')
loObject2.Tag = "QualifyingProperties"
loObject2.AddAttribute("Target","#S9fe8096e-2cac-415d-9222-f6cf2ecb314b")
loObject2.AddAttribute("Id","QPS9fe8096e-2cac-415d-9222-f6cf2ecb314b")
loObject2.UpdateAttrAt("SignedProperties",1,"Id","XS9fe8096e-2cac-415d-9222-f6cf2ecb314b")
loObject2.UpdateChildContent("SignedProperties|SignedSignatureProperties|SigningTime","TO BE GENERATED BY CHILKAT")
loObject2.UpdateAttrAt("SignedProperties|SignedSignatureProperties|SigningCertificateV2|Cert|CertDigest|ds:DigestMethod",1,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256")
loObject2.UpdateChildContent("SignedProperties|SignedSignatureProperties|SigningCertificateV2|Cert|CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT")
loObject2.UpdateChildContent("SignedProperties|SignedSignatureProperties|SigningCertificateV2|Cert|IssuerSerialV2","TO BE GENERATED BY CHILKAT")
loObject2.UpdateChildContent("SignedProperties|SignedSignatureProperties|SignaturePolicyIdentifier|SignaturePolicyImplied","")
loObject2.UpdateChildContent("SignedProperties|SignedSignatureProperties|SignerRoleV2|ClaimedRoles|ClaimedRole","tesztelő")

* Here we have the EncapsulatedTimestamp found in the unsigned signature properties.
loObject2.UpdateAttrAt("UnsignedProperties|UnsignedSignatureProperties|SignatureTimeStamp",1,"Id","T72cb4961-4326-4319-857a-7cf55e7ef899")
loObject2.UpdateAttrAt("UnsignedProperties|UnsignedSignatureProperties|SignatureTimeStamp|ds:CanonicalizationMethod",1,"Algorithm","http://www.w3.org/2001/10/xml-exc-c14n#")
loObject2.UpdateAttrAt("UnsignedProperties|UnsignedSignatureProperties|SignatureTimeStamp|EncapsulatedTimeStamp",1,"Id","ET72cb4961-4326-4319-857a-7cf55e7ef899")
loObject2.UpdateChildContent("UnsignedProperties|UnsignedSignatureProperties|SignatureTimeStamp|EncapsulatedTimeStamp","TO BE GENERATED BY CHILKAT")
loObject2.UpdateAttrAt("UnsignedProperties|UnsignedSignatureProperties|TimeStampValidationData",1,"xmlns","http://uri.etsi.org/01903/v1.4.1#")
loObject2.UpdateAttrAt("UnsignedProperties|UnsignedSignatureProperties|CertificateValues",1,"Id","CV18c7702d-d45b-44bc-853a-a720f41053cd")
loObject2.UpdateAttrAt("UnsignedProperties|UnsignedSignatureProperties|CertificateValues|EncapsulatedX509Certificate",1,"Id","EC42db04c8-1422-407b-8c42-189353a55268")
loObject2.UpdateChildContent("UnsignedProperties|UnsignedSignatureProperties|CertificateValues|EncapsulatedX509Certificate","BASE64_CONTENT")
loObject2.UpdateAttrAt("UnsignedProperties|UnsignedSignatureProperties|CertificateValues|EncapsulatedX509Certificate[1]",1,"Id","EC04728b44-a32c-46c1-b9bb-85b1f6b3c7d3")
loObject2.UpdateChildContent("UnsignedProperties|UnsignedSignatureProperties|CertificateValues|EncapsulatedX509Certificate[1]","BASE64_CONTENT")

loGen.AddObject("O2S9fe8096e-2cac-415d-9222-f6cf2ecb314b",loObject2.GetXml(),"","")

* -------- Reference 1 --------
loGen.AddSameDocRef("Object0","sha256","EXCL_C14N","","")
loGen.SetRefIdAttr("Object0","Re1f816c4-7898-4544-9b41-f4156dc0c528")

* -------- Reference 2 --------
loGen.AddObjectRef("PS9fe8096e-2cac-415d-9222-f6cf2ecb314b","sha256","EXCL_C14N","","")
loGen.SetRefIdAttr("PS9fe8096e-2cac-415d-9222-f6cf2ecb314b","Ra873b616-e568-4c38-ae94-27fbff67cc43")

* -------- Reference 3 --------
loGen.AddSameDocRef("PObject0","sha256","EXCL_C14N","","")
loGen.SetRefIdAttr("PObject0","Ra5d85948-5d6a-4914-8c32-242f5d6d9e81")

* -------- Reference 4 --------
loGen.AddObjectRef("XS9fe8096e-2cac-415d-9222-f6cf2ecb314b","sha256","EXCL_C14N","","http://uri.etsi.org/01903#SignedProperties")
loGen.SetRefIdAttr("XS9fe8096e-2cac-415d-9222-f6cf2ecb314b","Ra7412a43-dc05-4e0a-ac84-e9a070214757")

* Provide a certificate + private key. (PFX password is test123)
loCert = CreateObject('Chilkat.Cert')
lnSuccess = loCert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loObject1
    RELEASE loObject2
    RELEASE loCert
    CANCEL
ENDIF

loGen.SetX509Cert(loCert,1)

loGen.KeyInfoType = "X509Data"
loGen.X509Type = "Certificate"

* -------------------------------------------------------------------------------------------
* To have the EncapsulatedTimeStamp automatically added, we only need to do 2 things.
* 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.
* 2) Specify the TSA URL (Timestamping Authority URL).
*    Here we specify the TSA URL:
* -------------------------------------------------------------------------------------------

loJsonTsa = CreateObject('Chilkat.JsonObject')
loJsonTsa.UpdateString("timestampToken.tsaUrl","http://timestamp.digicert.com")
loJsonTsa.UpdateBool("timestampToken.requestTsaCert",1)
loGen.SetTsa(loJsonTsa)

* Load XML to be signed...
loSbXml = CreateObject('Chilkat.StringBuilder')
loXmlToSign.GetXmlSb(loSbXml)

loGen.Behaviors = "IndentedSignature,OmitAlreadyDefinedSigNamespace"

* Sign the XML...
lnSuccess = loGen.CreateXmlDSigSb(loSbXml)
IF (lnSuccess <> 1) THEN
    ? loGen.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loObject1
    RELEASE loObject2
    RELEASE loCert
    RELEASE loJsonTsa
    RELEASE loSbXml
    CANCEL
ENDIF

* -----------------------------------------------

* Save the signed XML to a file.
lnSuccess = loSbXml.WriteFile("c:/temp/qa_output/signedXml.xml","utf-8",0)

? loSbXml.GetAsString()

* ----------------------------------------
* Verify the signatures we just produced...
loVerifier = CreateObject('Chilkat.XmlDSig')
lnSuccess = loVerifier.LoadSignatureSb(loSbXml)
IF (lnSuccess <> 1) THEN
    ? loVerifier.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loObject1
    RELEASE loObject2
    RELEASE loCert
    RELEASE loJsonTsa
    RELEASE loSbXml
    RELEASE loVerifier
    CANCEL
ENDIF

lnNumSigs = loVerifier.NumSignatures
lnVerifyIdx = 0
DO WHILE lnVerifyIdx < lnNumSigs
    loVerifier.Selector = lnVerifyIdx
    lnVerified = loVerifier.VerifySignature(1)
    IF (lnVerified <> 1) THEN
        ? loVerifier.LastErrorText
        RELEASE loXmlToSign
        RELEASE loGen
        RELEASE loObject1
        RELEASE loObject2
        RELEASE loCert
        RELEASE loJsonTsa
        RELEASE loSbXml
        RELEASE loVerifier
        CANCEL
    ENDIF

    lnVerifyIdx = lnVerifyIdx + 1
ENDDO
? "All signatures were successfully verified."

RELEASE loXmlToSign
RELEASE loGen
RELEASE loObject1
RELEASE loObject2
RELEASE loCert
RELEASE loJsonTsa
RELEASE loSbXml
RELEASE loVerifier