PowerBuilder

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/ PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Http
oleobject loo_SbXml
oleobject loo_Canon
string ls_CanonVersion
integer li_WithComments
string ls_Url
string ls_XmlInclCanon
string ls_XmlExclCanon

li_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.

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_SbXml = create oleobject
li_rc = loo_SbXml.ConnectToNewObject("Chilkat.StringBuilder")

loo_Canon = create oleobject
li_rc = loo_Canon.ConnectToNewObject("Chilkat.XmlDSig")

// Use inclusive XML canonicalization.
ls_CanonVersion = "C14N"
li_WithComments = 0

ls_Url = "https://www.chilkatsoft.com/exampleData/c14n/test7.xml"
li_Success = loo_Http.QuickGetSb(ls_Url,loo_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>

ls_XmlInclCanon = loo_Canon.CanonicalizeXml(loo_SbXml.GetAsString(),ls_CanonVersion,li_WithComments)
Write-Debug ls_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..
ls_CanonVersion = "EXCL_C14N"

ls_XmlExclCanon = loo_Canon.CanonicalizeXml(loo_SbXml.GetAsString(),ls_CanonVersion,li_WithComments)
Write-Debug ls_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>


destroy loo_Http
destroy loo_SbXml
destroy loo_Canon