AutoIt

Canonicalize XML Fragment

See more XML Digital Signatures Examples

Demonstrates how to canonicalize a fragment of an XML document. The fragment is identified by the element having an Id attribute equal to a specified value. (The Id attribute can have any namespace, and the attribute name is case-insensitive (thus "ID", "Id", "id", etc. match). AutoIt

Local $bSuccess = False

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

$oHttp = ObjCreate("Chilkat.Http")
$oSbXml = ObjCreate("Chilkat.StringBuilder")
$oCanon = ObjCreate("Chilkat.XmlDSig")

; Use exclusive XML canonicalization.
Local $sCanonVersion = "EXCL_C14N"
Local $bWithComments = False
; The optional inclusive namespaces prefix list if using exclusive canonicalization.
Local $sPrefixList = ""

Local $sUrl = "https://www.chilkatsoft.com/exampleData/canonicalizeFragmentTest.xml"
$bSuccess = $oHttp.QuickGetSb($sUrl,$oSbXml)

; This is the input XML:

; <?xml version="1.0" encoding="UTF-8"?>
; <Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
; <SignedInfo>
;   <CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315" />
;   <SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" />
;   <Reference URI="#object">
;     <DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" />
;     <DigestValue>OPnpF/ZNLDxJ/I+1F3iHhlmSwgo=</DigestValue>
;   </Reference>
; </SignedInfo>
; <SignatureValue>nihUFQg4mDhLgecvhIcKb9Gz8VRTOlw+adiZOBBXgK4JodEe5aFfCqm8WcRIT8GL
; LXSk8PsUP4//SsKqUBQkpotcAqQAhtz2v9kCWdoUDnAOtFZkd/CnsZ1sge0ndha4
; 0wWDV+nOWyJxkYgicvB8POYtSmldLLepPGMz+J7/Uws=</SignatureValue>
; <KeyInfo>
;   <KeyValue>
;     <RSAKeyValue>
;       <Modulus>4IlzOY3Y9fXoh3Y5f06wBbtTg94Pt6vcfcd1KQ0FLm0S36aGJtTSb6pYKfyX7PqC
;       UQ8wgL6xUJ5GRPEsu9gyz8ZobwfZsGCsvu40CWoT9fcFBZPfXro1Vtlh/xl/yYHm
;       +Gzqh0Bw76xtLHSfLfpVOrmZdwKmSFKMTvNXOFd0V18=</Modulus>
;       <Exponent>AQAB</Exponent>
;     </RSAKeyValue>
;   </KeyValue>
; </KeyInfo>
; <Object Id="object">some text
;   with spaces and CR-LF.</Object>
; </Signature>

; Canonicalize and return the fragment of XML starting at the element where the Id attribute equals "object".
Local $sXmlCanonFrag = $oCanon.CanonicalizeFragment($oSbXml.GetAsString(),"object",$sCanonVersion,$sPrefixList,$bWithComments)
ConsoleWrite($sXmlCanonFrag & @CRLF)

; The output is:
; 
; <Object xmlns="http://www.w3.org/2000/09/xmldsig#" Id="object">some text
;   with spaces and CR-LF.</Object>
;