Visual Basic 6.0

XML Inclusive Canonicalization

See more XML Digital Signatures Examples

Demonstrates how to convert XML to the Inclusive XML Canonicalization form as specified in http://www.w3.org/TR/xml-c14n/ Visual Basic 6.0

Dim success As Long
success = 0

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

' The XML digital signature verification class provides utility methods for
' XML canonicalization.  This example demonstrates how to do inclusive XML canonicalization.

Dim http As New ChilkatHttp
Dim sbXml As New ChilkatStringBuilder
Dim canon As New ChilkatXmlDSig

' Use inclusive XML canonicalization.
Dim canonVersion As String
canonVersion = "C14N"
Dim withComments As Long
withComments = 0

Dim url As String
url = "https://www.chilkatsoft.com/exampleData/c14n/test7.xml"
success = http.QuickGetSb(url,sbXml)

' This is the input XML:
' The XML comment is referring to when exclusive XML canonicalization is applied.  With inclusive canonicalization, the namespace nodes
' are kept, as we'll see below..

' <doc>
' <!-- A namespace node N is ignored if the nearest ancestor element of the node's parent element that is in the node-set has a namespace node in the node-set with the same local name and value as N. -->
' 	<animal xmlns:aa="https://www.animal.com/">
' 		<reptile xmlns:bb="https://www.reptile.com/">
'   			<lizard xmlns="" type="african fat tailed" abc="xyz" xmlns:aa="https://www.animal.com/" />
'   			<snake type="poisonous rattler" xmlns:bb="https://www.reptile.com/" >
'   			</snake>
'   		</reptile>
'   	</animal>
' </doc>

Dim xmlInclCanon As String
xmlInclCanon = canon.CanonicalizeXml(sbXml.GetAsString(),canonVersion,withComments)
Debug.Print xmlInclCanon

' The C14N (inclusive) canonicalization is:

' <doc>
' 
' 	<animal xmlns:aa="https://www.animal.com/">
' 		<reptile xmlns:bb="https://www.reptile.com/">
'   			<lizard abc="xyz" type="african fat tailed"></lizard>
'   			<snake type="poisonous rattler">
'   			</snake>
'   		</reptile>
'   	</animal>
' </doc>

' To see the difference, let's do exclusive canonicalization..
canonVersion = "EXCL_C14N"

Dim xmlExclCanon As String
xmlExclCanon = canon.CanonicalizeXml(sbXml.GetAsString(),canonVersion,withComments)
Debug.Print xmlExclCanon

' // The C14N (exclusive) canonicalization is:
' 
' <doc>
' 
' 	<animal>
' 		<reptile>
'   			<lizard abc="xyz" type="african fat tailed"></lizard>
'   			<snake type="poisonous rattler">
'   			</snake>
'   		</reptile>
'   	</animal>
' </doc>