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(Tcl) 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 Tcl Extension Downloads

Chilkat Tcl Extension Downloads

load ./chilkat.dll

# ----------------------------------------------------------------------
# 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.
set xmlToSign [new_CkXml]

set success [CkXml_LoadXmlFile $xmlToSign "qa_data/fattura_electronica/docToSign.xml"]
if {[expr $success != 1]} then {
    puts [CkXml_lastErrorText $xmlToSign]
    delete_CkXml $xmlToSign
    exit
}

set gen [new_CkXmlDSigGen]

CkXmlDSigGen_put_SigLocation $gen "p:FatturaElettronica"
CkXmlDSigGen_put_SigId $gen "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504"
CkXmlDSigGen_put_SigNamespacePrefix $gen "ds"
CkXmlDSigGen_put_SigNamespaceUri $gen "http://www.w3.org/2000/09/xmldsig#"
CkXmlDSigGen_put_SigValueId $gen "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-sigvalue"
CkXmlDSigGen_put_SignedInfoCanonAlg $gen "C14N"
CkXmlDSigGen_put_SignedInfoDigestMethod $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.
set object1 [new_CkXml]

CkXml_put_Tag $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-6f4b994a-7191-4bb1-ab3c-17549515b504"
CkXml_UpdateAttrAt $object1 "xades:SignedProperties" 1 "Id" "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-signedprops"
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"

CkXmlDSigGen_AddObject $gen "" [CkXml_getXml $object1] "" ""

# -------- Reference 1 --------
CkXmlDSigGen_put_KeyInfoId $gen "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-keyinfo"
CkXmlDSigGen_AddSameDocRef $gen "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-keyinfo" "sha256" "" "" ""

# -------- Reference 2 --------
CkXmlDSigGen_AddSameDocRef $gen "" "sha256" "" "" ""
CkXmlDSigGen_SetRefIdAttr $gen "" "xmldsig-6f4b994a-7191-4bb1-ab3c-17549515b504-ref0"

# -------- Reference 3 --------
CkXmlDSigGen_AddObjectRef $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
set cert [new_CkCert]

# 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.
set success [CkCert_LoadFromSmartcard $cert ""]
if {[expr $success != 1]} then {
    puts [CkCert_lastErrorText $cert]
    delete_CkXml $xmlToSign
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkCert $cert
    exit
}

#  You may provide the PIN here.  Otherwise Windows will display a PIN dialog.
CkCert_put_SmartCardPin $cert "000000"

CkXmlDSigGen_SetX509Cert $gen $cert 1
CkXmlDSigGen_put_KeyInfoType $gen "X509Data"
CkXmlDSigGen_put_X509Type $gen "Certificate"

# Load XML to be signed...
set sbXml [new_CkStringBuilder]

CkXml_GetXmlSb $xmlToSign $sbXml

CkXmlDSigGen_put_Behaviors $gen "IndentedSignature,ForceAddEnvelopedSignatureTransform"

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

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

puts [CkStringBuilder_getAsString $sbXml]

# ----------------------------------------
# Verify the signature we just produced...
set verifier [new_CkXmlDSig]

set success [CkXmlDSig_LoadSignatureSb $verifier $sbXml]
if {[expr $success != 1]} then {
    puts [CkXmlDSig_lastErrorText $verifier]
    delete_CkXml $xmlToSign
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkCert $cert
    delete_CkStringBuilder $sbXml
    delete_CkXmlDSig $verifier
    exit
}

set verified [CkXmlDSig_VerifySignature $verifier 1]
if {[expr $verified != 1]} then {
    puts [CkXmlDSig_lastErrorText $verifier]
    delete_CkXml $xmlToSign
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkCert $cert
    delete_CkStringBuilder $sbXml
    delete_CkXmlDSig $verifier
    exit
}

puts "This signature was successfully verified."

delete_CkXml $xmlToSign
delete_CkXmlDSigGen $gen
delete_CkXml $object1
delete_CkCert $cert
delete_CkStringBuilder $sbXml
delete_CkXmlDSig $verifier

 

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