Sir,

I am trying to apply digital signature on the xml file generated through xforms document.

I want to develop the code that will develop a button on xforms document and after clicking on the button it will digitally sign the xml file generated throug xforms.

The code that i have written is as follows , kindly reply if there is any need for modification of the code,

The code is..

<html 
 xmlns="http://www.w3.org/1999/xhtml" 
 xmlns:xforms="http://www.w3.org/2002/xforms" 
 xmlns:ev="http://www.w3.org/2001/xml-events"
 xmlns:xs="http://www.w3.org/2001/XMLSchema"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:c14n="http://www.w3.org/2001/10/xml-exc-c14n#"
 xmlns:custom="http://www.ibm.com/xmlns/prod/XFDL/Custom" 
 xmlns:designer="http://www.ibm.com/xmlns/prod/workplace/forms/designer/2.6" 
 xmlns:ds="http://www.w3.org/2000/09/xmldsig#" 
 xmlns:dsxp="http://www.w3.org/2002/06/xmldsig-filter2" 
 xmlns:sigmeta="http://www.ibm.com/xmlns/prod/forms/signature/metadata/1.0" 
 xmlns:xfdl="http://www.ibm.com/xmlns/prod/XFDL/7.6">

<head>

<xforms:model>

<xforms:instance id="GeneratedInstance" xmlns="">
   <generated>
                 
      <test/>
      <PAGE1>
         <BUTTON1>
             <ds:Signature>

                <ds:SignedInfo>
                   <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"></ds:CanonicalizationMethod>
                   <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1">
                   </ds:SignatureMethod>
                   <ds:Reference>
                      <ds:Transforms>
                         <ds:Transform Algorithm="http://www.w3.org/2002/06/xmldsig-filter2">
                            <dsxp:XPath Filter="subtract">/xfdl:XFDL/xfdl:globalpage/xfdl:global/xfdl:xformsmodels/xforms:model/xforms:instance[@id="GeneratedInstance"]/generated/PAGE1/BUTTON1/ds:Signature</dsxp:XPath>

                         </ds:Transform>
     
                 </ds:Transforms>
                      <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1">
                      </ds:DigestMethod>
                      <ds:DigestValue></ds:DigestValue>
                   </ds:Reference>
                   <ds:Reference URI="">
                      <ds:Transforms>
                         <ds:Transform Algorithm="http://www.w3.org/2002/06/xmldsig-filter2">

                         <dsxp:XPath Filter="intersect">here()/ancestor::ds:Signature[1]/ds:Object[sigmeta:metadata]</dsxp:XPath>
                         </ds:Transform>
                       </ds:Transforms>
                       <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
                       <ds:DigestValue></ds:DigestValue>
                   </ds:Reference>
                 </ds:SignedInfo>
              <ds:SignatureValue></ds:SignatureValue>

              <ds:Object>
                 <sigmeta:metadata>
                    <sigmeta:timestamp>
                       <sigmeta:signtime></sigmeta:signtime>
                       <sigmeta:dst></sigmeta:dst>
               
        <sigmeta:date></sigmeta:date>
                    </sigmeta:timestamp>
                    <sigmeta:signformat>
                    application/signature+xml;
                       engine="GenericRSA"
                    </sigmeta:signformat>

                 </sigmeta:metadata>
              </ds:Object>
           </ds:Signature>
         </BUTTON1>
      </PAGE1>
   </generated>
</xforms:instance>

 <xforms:submission id="saveDoc" action="data.xml" replace="none" method="put" />
		<xforms:submission id="loadDoc" action="data.xml" replace="instance" method="get"/>

<xforms:signature ref="ds:Signature" id="X">
<xforms:action ev:event="signature-create">
Actions to prepare dsig:Signature
</xforms:action>
<xforms:action ev:event="signature-create-done">
Actions to post-process success
</xforms:action>
<xforms:action ev:event="signature-create-error">
Actions that respond to failure
</xforms:action>

</xforms:signature>


</xforms:model>

<!-- <script language="javascript" type="text/javascript">

			function setCertStr(cert) {
				document.getElementById('cert_data').value = '';
				document.getElementById('cert_data').value = cert;
			}
			
		</script> -->

</head>
<body>
<p>name</p>
<xforms:input ref="test"/>

<xforms:button sid="BUTTON1">
         <xforms:trigger
 ref="instance('GeneratedInstance')/PAGE1/
               BUTTON1/ds:Signature/ds:SignatureValue">
            <xforms:label>Click to Sign</xforms:label>
         </xforms:trigger>
         <xforms:itemlocation>

            <below>FIELD3</below>
            <width>246</width>
         </xforms:itemlocation>
         <xforms:value compute="signer == 'INVALID' ? invalid() : signer">
         </xforms:value>
         <xforms:type>signature</xforms:type>
         <xforms:signer></xforms:signer>

         <signformat>application/signature+xml;engine="GenericRSA"</signformat>


      </xforms:button>
<!-- <textarea rows="6" cols="50" id="cert_data"></textarea>
    
       <applet code="gov.nic.keyupload.gui.KeyRegister.class"
        		archive="sign.jar,plugin.jar" 
        		width="500" height="150" name="CertRead" id="CertRead">
        	<param name="appType" value="read" />
        </applet> -->
         
    <xforms:submit submission="saveDoc">
			<xforms:label>Save Doc</xforms:label>
		</xforms:submit>

		<xforms:submit submission="loadDoc">

			<xforms:label>Load Doc</xforms:label>
		</xforms:submit>

</body>
</html>

Please reply me ..

Thanks and Regads,
Deepak Tewani
Programmer
NIC