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(Tcl) 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 Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

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

set success 1

# 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.)
set sbXml [new_CkStringBuilder]

set success [CkStringBuilder_LoadFile $sbXml "xmlToSign.xml" "utf-8"]

set gen [new_CkXmlDSigGen]

CkXmlDSigGen_put_SigLocation $gen "TransakcniLogSystemu"
CkXmlDSigGen_put_SigLocationMod $gen 0
CkXmlDSigGen_put_SigId $gen "SignatureID-Signature1"
CkXmlDSigGen_put_SigNamespacePrefix $gen "ds"
CkXmlDSigGen_put_SigNamespaceUri $gen "http://www.w3.org/2000/09/xmldsig#"
CkXmlDSigGen_put_SignedInfoCanonAlg $gen "C14N"
CkXmlDSigGen_put_SignedInfoDigestMethod $gen "sha256"

# Set the KeyInfoId before adding references..
CkXmlDSigGen_put_KeyInfoId $gen "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.

set object1 [new_CkXml]

CkXml_put_Tag $object1 "xades:QualifyingProperties"
CkXml_AddAttribute $object1 "Target" "#Signature1"

CkXml_UpdateAttrAt $object1 "xades:SignedProperties" 1 "Id" "SignedProperties-Signature-Signature1"
CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime" "TO BE GENERATED BY CHILKAT"
CkXml_UpdateAttrAt $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod" 1 "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"

# The EncapsulatedTimestamp will be included in the unsigned properties.
CkXml_UpdateAttrAt $object1 "xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp" 1 "Id" "signature-timestamp-5561-8212-3316-5191"
CkXml_UpdateAttrAt $object1 "xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|ds:CanonicalizationMethod" 1 "Algorithm" "http://www.w3.org/2001/10/xml-exc-c14n#"
CkXml_UpdateAttrAt $object1 "xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|xades:EncapsulatedTimeStamp" 1 "Encoding" "http://uri.etsi.org/01903/v1.2.2#DER"
CkXml_UpdateChildContent $object1 "xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|xades:EncapsulatedTimeStamp" "TO BE GENERATED BY CHILKAT"

CkXmlDSigGen_AddObject $gen "XadesObjectId-Signature1" [CkXml_getXml $object1] "" ""

# -------- Reference 1 --------
CkXmlDSigGen_AddObjectRef $gen "SignedProperties-Signature-Signature1" "sha256" "EXCL_C14N" "" "http://uri.etsi.org/01903#SignedProperties"

# -------- Reference 2 --------
CkXmlDSigGen_AddSameDocRef $gen "KeyInfoId-Signature-Signature1" "sha256" "EXCL_C14N" "" ""
CkXmlDSigGen_SetRefIdAttr $gen "KeyInfoId-Signature-Signature1" "ReferenceKeyInfo"

# -------- Reference 3 --------
CkXmlDSigGen_AddSameDocRef $gen "" "sha256" "EXCL_C14N" "" ""
CkXmlDSigGen_SetRefIdAttr $gen "" "Reference-Signature1"

# Provide a certificate + private key. (PFX password is test123)
set cert [new_CkCert]

set success [CkCert_LoadPfxFile $cert "qa_data/pfx/cert_test123.pfx" "test123"]
if {$success != 1} then {
    puts [CkCert_lastErrorText $cert]
    delete_CkStringBuilder $sbXml
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkCert $cert
    exit
}

CkXmlDSigGen_SetX509Cert $gen $cert 1

CkXmlDSigGen_put_KeyInfoType $gen "X509Data"
CkXmlDSigGen_put_X509Type $gen "Certificate"

CkXmlDSigGen_put_Behaviors $gen "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:
# -------------------------------------------------------------------------------------------

set jsonTsa [new_CkJsonObject]

CkJsonObject_UpdateString $jsonTsa "timestampToken.tsaUrl" "https://www3.postsignum.cz/TSS/TSS_crt/"
CkJsonObject_UpdateBool $jsonTsa "timestampToken.requestTsaCert" 1
CkXmlDSigGen_SetTsa $gen $jsonTsa

# -------------------------------------------------------------------------------------------
# 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.
# -------------------------------------------------------------------------------------------
set http [new_CkHttp]

set success [CkHttp_SetSslClientCertPfx $http "/home/bob/pfxFiles/myClientSideCertWithPrivateKey.pfx" "pfxPassword"]
if {$success != 1} then {
    puts [CkHttp_lastErrorText $http]
    delete_CkStringBuilder $sbXml
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkCert $cert
    delete_CkJsonObject $jsonTsa
    delete_CkHttp $http
    exit
}

# Tell the XmlDSigGen object to use the above HTTP object for TSA communications.
CkXmlDSigGen_SetHttpObj $gen $http

# Sign the XML...
set success [CkXmlDSigGen_CreateXmlDSigSb $gen $sbXml]
if {$success != 1} then {
    puts [CkXmlDSigGen_lastErrorText $gen]
    delete_CkStringBuilder $sbXml
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkCert $cert
    delete_CkJsonObject $jsonTsa
    delete_CkHttp $http
    exit
}

# -----------------------------------------------

# Save the signed XML to a file.
set success [CkStringBuilder_WriteFile $sbXml "c:/temp/qa_output/signedXml.xml" "utf-8" 0]

puts [CkStringBuilder_getAsString $sbXml]

delete_CkStringBuilder $sbXml
delete_CkXmlDSigGen $gen
delete_CkXml $object1
delete_CkCert $cert
delete_CkJsonObject $jsonTsa
delete_CkHttp $http

 

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