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(Tcl) XML-DSig Add Reference with Transforms Specified Explicitly

Demonstrates how to use the new AddSameDocRef2 method to explicitly specify the XML Transforms fragment.

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

# Create the following XML to be signed:

# <doc>
#     <s id="s1">Some text...</s>
#     <p>Some text...</p>
#     <p class="note">A note...</p>
# </doc>

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

set xmlToSign [new_CkXml]

CkXml_put_Tag $xmlToSign "doc"
CkXml_UpdateAttrAt $xmlToSign "s" 1 "id" "s1"
CkXml_UpdateChildContent $xmlToSign "s" "Some text..."
CkXml_UpdateChildContent $xmlToSign "p" "Some text..."
CkXml_UpdateAttrAt $xmlToSign "p[1]" 1 "class" "note"
CkXml_UpdateChildContent $xmlToSign "p[1]" "A note..."

puts [CkXml_getXml $xmlToSign]

set gen [new_CkXmlDSigGen]

CkXmlDSigGen_put_SigLocation $gen "doc"
CkXmlDSigGen_put_SigLocationMod $gen 0
CkXmlDSigGen_put_SigId $gen "Signature-78f29839-06af-448f-b479-ca46457fab1b-Signature"
CkXmlDSigGen_put_SigNamespacePrefix $gen "ds"
CkXmlDSigGen_put_SigNamespaceUri $gen "http://www.w3.org/2000/09/xmldsig#"
CkXmlDSigGen_put_SigValueId $gen "Signature-78f29839-06af-448f-b479-ca46457fab1b-SignatureValue"
CkXmlDSigGen_put_SignedInfoCanonAlg $gen "C14N"
CkXmlDSigGen_put_SignedInfoDigestMethod $gen "sha1"

# Set the KeyInfoId before adding references..
CkXmlDSigGen_put_KeyInfoId $gen "Signature-78f29839-06af-448f-b479-ca46457fab1b-KeyInfo"

# The following XML to be added as an Object to the Signature

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

# <xades:QualifyingProperties Id="Signature-78f29839-06af-448f-b479-ca46457fab1b-QualifyingProperties" Target="#Signature-78f29839-06af-448f-b479-ca46457fab1b-Signature" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:xades="http://uri.etsi.org/01903/v1.3.2#">
#     <xades:SignedProperties Id="Signature-78f29839-06af-448f-b479-ca46457fab1b-SignedProperties">
#         <xades:SignedSignatureProperties>
#             <xades:SigningTime>TO BE GENERATED BY CHILKAT</xades:SigningTime>
#             <xades:SigningCertificate>
#                 <xades:Cert>
#                     <xades:CertDigest>
#                         <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
#                         <ds:DigestValue>TO BE GENERATED BY CHILKAT</ds:DigestValue>
#                     </xades:CertDigest>
#                     <xades:IssuerSerial>
#                         <ds:X509IssuerName>TO BE GENERATED BY CHILKAT</ds:X509IssuerName>
#                         <ds:X509SerialNumber>TO BE GENERATED BY CHILKAT</ds:X509SerialNumber>
#                     </xades:IssuerSerial>
#                 </xades:Cert>
#             </xades:SigningCertificate>
#         </xades:SignedSignatureProperties>
#         <xades:SignedDataObjectProperties>
#             <xades:DataObjectFormat ObjectReference="#Reference-24eb6003-d41c-442c-a731-d4c58f94790b">
#                 <xades:Description/>
#                 <xades:ObjectIdentifier>
#                     <xades:Identifier Qualifier="OIDAsURN">urn:oid:1.2.840.10003.5.109.10</xades:Identifier>
#                     <xades:Description/>
#                 </xades:ObjectIdentifier>
#                 <xades:MimeType>text/xml</xades:MimeType>
#                 <xades:Encoding/>
#             </xades:DataObjectFormat>
#         </xades:SignedDataObjectProperties>
#     </xades:SignedProperties>
# </xades:QualifyingProperties>

set object1 [new_CkXml]

CkXml_put_Tag $object1 "xades:QualifyingProperties"
CkXml_AddAttribute $object1 "Id" "Signature-78f29839-06af-448f-b479-ca46457fab1b-QualifyingProperties"
CkXml_AddAttribute $object1 "Target" "#Signature-78f29839-06af-448f-b479-ca46457fab1b-Signature"
CkXml_AddAttribute $object1 "xmlns:ds" "http://www.w3.org/2000/09/xmldsig#"
CkXml_AddAttribute $object1 "xmlns:xades" "http://uri.etsi.org/01903/v1.3.2#"
CkXml_UpdateAttrAt $object1 "xades:SignedProperties" 1 "Id" "Signature-78f29839-06af-448f-b479-ca46457fab1b-SignedProperties"
CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime" "TO BE GENERATED BY CHILKAT"
# Note: It may be that http://www.w3.org/2001/04/xmlenc#sha256 is needed in the following line instead of http://www.w3.org/2000/09/xmldsig#sha1
CkXml_UpdateAttrAt $object1 "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod" 1 "Algorithm" "http://www.w3.org/2000/09/xmldsig#sha1"
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"
CkXml_UpdateAttrAt $object1 "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat" 1 "ObjectReference" "#Reference-24eb6003-d41c-442c-a731-d4c58f94790b"
CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Description" ""
CkXml_UpdateAttrAt $object1 "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Identifier" 1 "Qualifier" "OIDAsURN"
CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Identifier" "urn:oid:1.2.840.10003.5.109.10"
CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Description" ""
CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType" "text/xml"
CkXml_UpdateChildContent $object1 "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Encoding" ""

puts [CkXml_getXml $object1]

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

# -------- Reference 1 --------

# Create the following Transforms fragment:

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

# <ds:Transforms>
#     <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
#     <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
#     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
#         <ds:XPath xmlns:ds="http://www.w3.org/2000/09/xmldsig#">not(ancestor-or-self::ds:Signature)</ds:XPath>
#     </ds:Transform>
# </ds:Transforms>

set xml1 [new_CkXml]

CkXml_put_Tag $xml1 "ds:Transforms"
CkXml_UpdateAttrAt $xml1 "ds:Transform" 1 "Algorithm" "http://www.w3.org/TR/2001/REC-xml-c14n-20010315"
CkXml_UpdateAttrAt $xml1 "ds:Transform[1]" 1 "Algorithm" "http://www.w3.org/2000/09/xmldsig#enveloped-signature"
CkXml_UpdateAttrAt $xml1 "ds:Transform[2]" 1 "Algorithm" "http://www.w3.org/TR/1999/REC-xpath-19991116"
CkXml_UpdateAttrAt $xml1 "ds:Transform[2]|ds:XPath" 1 "xmlns:ds" "http://www.w3.org/2000/09/xmldsig#"
CkXml_UpdateChildContent $xml1 "ds:Transform[2]|ds:XPath" "not(ancestor-or-self::ds:Signature)"

# This is the "Transforms" XML fragment passed to AddSameDocRef2.
puts [CkXml_getXml $xml1]

CkXmlDSigGen_AddSameDocRef2 $gen "" "sha1" $xml1 ""

CkXmlDSigGen_SetRefIdAttr $gen "" "Reference-24eb6003-d41c-442c-a731-d4c58f94790b"

# -------- Reference 2 --------
CkXmlDSigGen_AddObjectRef $gen "Signature-78f29839-06af-448f-b479-ca46457fab1b-SignedProperties" "sha1" "" "" "http://uri.etsi.org/01903#SignedProperties"

# -------- Reference 3 --------
CkXmlDSigGen_AddSameDocRef $gen "Signature-78f29839-06af-448f-b479-ca46457fab1b-KeyInfo" "sha1" "" "" ""

# 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_CkXml $xmlToSign
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkXml $xml1
    delete_CkCert $cert
    exit
}

CkXmlDSigGen_SetX509Cert $gen $cert 1

CkXmlDSigGen_put_KeyInfoType $gen "X509Data+KeyValue"
CkXmlDSigGen_put_X509Type $gen "CertChain"

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

CkXml_GetXmlSb $xmlToSign $sbXml

CkXmlDSigGen_put_Behaviors $gen "IndentedSignature"

# Sign the XML...
set success [CkXmlDSigGen_CreateXmlDSigSb $gen $sbXml]
if {$success != 1} then {
    puts [CkXmlDSigGen_lastErrorText $gen]
    delete_CkXml $xmlToSign
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkXml $xml1
    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 signatures we just produced...
set verifier [new_CkXmlDSig]

set success [CkXmlDSig_LoadSignatureSb $verifier $sbXml]
if {$success != 1} then {
    puts [CkXmlDSig_lastErrorText $verifier]
    delete_CkXml $xmlToSign
    delete_CkXmlDSigGen $gen
    delete_CkXml $object1
    delete_CkXml $xml1
    delete_CkCert $cert
    delete_CkStringBuilder $sbXml
    delete_CkXmlDSig $verifier
    exit
}

set numSigs [CkXmlDSig_get_NumSignatures $verifier]
set verifyIdx 0
while {$verifyIdx < $numSigs} {
    CkXmlDSig_put_Selector $verifier $verifyIdx
    set verified [CkXmlDSig_VerifySignature $verifier 1]
    if {$verified != 1} then {
        puts [CkXmlDSig_lastErrorText $verifier]
        delete_CkXml $xmlToSign
        delete_CkXmlDSigGen $gen
        delete_CkXml $object1
        delete_CkXml $xml1
        delete_CkCert $cert
        delete_CkStringBuilder $sbXml
        delete_CkXmlDSig $verifier
        exit
    }

    set verifyIdx [expr $verifyIdx + 1]
}
puts "All signatures were successfully verified."

delete_CkXml $xmlToSign
delete_CkXmlDSigGen $gen
delete_CkXml $object1
delete_CkXml $xml1
delete_CkCert $cert
delete_CkStringBuilder $sbXml
delete_CkXmlDSig $verifier

 

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