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(PowerBuilder) Create XML Digital Signature using HMAC Key

Demonstrates how to create an XML digital signature using an HMAC key.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
string ls_Url
oleobject loo_Http
oleobject loo_SbXml
integer li_Success
oleobject loo_XmlSigGen

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

//  Signs the following XML using an HMAC key.

//  <?xml version="1.0" encoding="UTF-8" standalone="no"?>
//  <collection Id="root">
//  	<album>
//  		<title>Questions, unanswered</title>
//  		<artist>Steve and the flubberblubs</artist>
//  		<year>1989</year>
//  		<t:tracks xmlns:t="http://test.xades4j/tracks">
//  			<t:song length="4:05" tracknumber="1">
//  				<t:title>What do you know?</t:title>
//  				<t:artist>Steve and the flubberblubs</t:artist>
//  				<t:lastplayed>2006-10-17-08:31</t:lastplayed>
//  			</t:song>
//  			<t:song length="3:45" tracknumber="2">
//  				<t:title>Who do you know?</t:title>
//  				<t:artist>Steve and the flubberblubs</t:artist>
//  				<t:lastplayed>2006-10-17-08:35</t:lastplayed>
//  			</t:song>
//  			<t:song length="5:14" tracknumber="3">
//  				<t:title>When do you know?</t:title>
//  				<t:artist>Steve and the flubberblubs</t:artist>
//  				<t:lastplayed>2006-10-17-08:39</t:lastplayed>
//  			</t:song>
//  			<t:song length="4:19" tracknumber="4">
//  				<t:title>Do you know?</t:title>
//  				<t:artist>Steve and the flubberblubs</t:artist>
//  				<t:lastplayed>2006-10-17-08:44</t:lastplayed>
//  			</t:song>
//  		</t:tracks>
//  	</album>
//  </collection>
// 

//  The above XML is available at https://www.chilkatsoft.com/exampleData/flubberblub.xml
//  Fetch the XML and then sign it..

ls_Url = "https://www.chilkatsoft.com/exampleData/flubberblub.xml"
loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat_9_5_0.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_9_5_0.StringBuilder")

li_Success = loo_Http.QuickGetSb(ls_Url,loo_SbXml)
if li_Success <> 1 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    destroy loo_SbXml
    return
end if

loo_XmlSigGen = create oleobject
li_rc = loo_XmlSigGen.ConnectToNewObject("Chilkat_9_5_0.XmlDSigGen")

//  The Signature will be inserted under the "collection" element.
loo_XmlSigGen.SigLocation = "collection"

//  Sign everything in <collection Id="root"> ... </collection>
loo_XmlSigGen.AddSameDocRef("root","sha256","C14N","","")

//  Specify the HMAC key.
//  For example, if the HMAC key is to be the us-ascii bytes of the string "secret",
//  the HMAC key can be set in any of the following ways (and also more ways not shown here..)
loo_XmlSigGen.SetHmacKey("secret","ascii")
//  or
loo_XmlSigGen.SetHmacKey("c2VjcmV0","base64")
//  or
loo_XmlSigGen.SetHmacKey("736563726574","hex")

//  Sign the XML..
li_Success = loo_XmlSigGen.CreateXmlDSigSb(loo_SbXml)
if li_Success <> 1 then
    Write-Debug loo_XmlSigGen.LastErrorText
    destroy loo_Http
    destroy loo_SbXml
    destroy loo_XmlSigGen
    return
end if

//  Examine the signed XML:
Write-Debug loo_SbXml.GetAsString()

//  The output is:
// 
//  <?xml version="1.0" encoding="UTF-8" standalone="no"?>
//  <collection Id="root">
//  	<album>
//  		<title>Questions, unanswered</title>
//  		<artist>Steve and the flubberblubs</artist>
//  		<year>1989</year>
//  		<t:tracks xmlns:t="http://test.xades4j/tracks">
//  			<t:song length="4:05" tracknumber="1">
//  				<t:title>What do you know?</t:title>
//  				<t:artist>Steve and the flubberblubs</t:artist>
//  				<t:lastplayed>2006-10-17-08:31</t:lastplayed>
//  			</t:song>
//  			<t:song length="3:45" tracknumber="2">
//  				<t:title>Who do you know?</t:title>
//  				<t:artist>Steve and the flubberblubs</t:artist>
//  				<t:lastplayed>2006-10-17-08:35</t:lastplayed>
//  			</t:song>
//  			<t:song length="5:14" tracknumber="3">
//  				<t:title>When do you know?</t:title>
//  				<t:artist>Steve and the flubberblubs</t:artist>
//  				<t:lastplayed>2006-10-17-08:39</t:lastplayed>
//  			</t:song>
//  			<t:song length="4:19" tracknumber="4">
//  				<t:title>Do you know?</t:title>
//  				<t:artist>Steve and the flubberblubs</t:artist>
//  				<t:lastplayed>2006-10-17-08:44</t:lastplayed>
//  			</t:song>
//  		</t:tracks>
//  	</album>
//  <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#"><ds:SignedInfo><ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/><ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#hmac-sha256"/><ds:Reference URI="#root"><ds:Transforms><ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/></ds:Transforms><ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/><ds:DigestValue>rD/g8soqKz8EiPUBhEWfcQacS0ta4ULHX3dKMEH6ZoQ=</ds:DigestValue></ds:Reference></ds:SignedInfo><ds:SignatureValue>R8dXP95VRYJBfL6d0Peogybdk27+R+JIfX8jnVu0NOI=</ds:SignatureValue></ds:Signature></collection>
// 


destroy loo_Http
destroy loo_SbXml
destroy loo_XmlSigGen

 

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