(VB.NET) CSR Get Extension Request

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If a CSR contains a 1.2.840.113549.1.9.14 extensionRequest, then this method will return the extension request in XML format.

Note: This example requires Chilkat v9.5.0.91 or greater.

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

Dim csr As New Chilkat.Csr

' Load a CSR PEM file.  The file should contain content that looks like this:
' 
' 	-----BEGIN CERTIFICATE REQUEST-----
' 	MII...
' 	....
' 	....
' 	....
' 	-----END CERTIFICATE REQUEST-----

Dim fac As New Chilkat.FileAccess
Dim csrPem As String = fac.ReadEntireTextFile("qa_data/csr/sample.pem","utf-8")

Dim success As Boolean = csr.LoadCsrPem(csrPem)
If (success <> True) Then
    Debug.WriteLine(csr.LastErrorText)
    Exit Sub
End If


Dim xml As New Chilkat.Xml

success = csr.GetExtensionRequest(xml)
If (success <> True) Then
    Debug.WriteLine("CSR has no extensionRequest.")
    Exit Sub
End If


Dim xmlStr As String = xml.GetXml()
Debug.WriteLine(xmlStr)

' Sample output:

' <?xml version="1.0" encoding="utf-8"?>
' <set>
'     <sequence>
'         <sequence>
'             <oid>1.3.6.1.4.1.311.20.2</oid>
'             <asnOctets>
'                 <printable>ZATCA-Code-Signing</printable>
'             </asnOctets>
'         </sequence>
'         <sequence>
'             <oid>2.5.29.17</oid>
'             <asnOctets>
'                 <sequence>
'                     <contextSpecific tag="4" constructed="1">
'                         <sequence>
'                             <set>
'                                 <sequence>
'                                     <oid>2.5.4.4</oid>
'                                     <utf8>334623324234325</utf8>
'                                 </sequence>
'                             </set>
'                             <set>
'                                 <sequence>
'                                     <oid>0.9.2342.19200300.100.1.1</oid>
'                                     <utf8>310122393500003</utf8>
'                                 </sequence>
'                             </set>
'                             <set>
'                                 <sequence>
'                                     <oid>2.5.4.12</oid>
'                                     <utf8>0000</utf8>
'                                 </sequence>
'                             </set>
'                             <set>
'                                 <sequence>
'                                     <oid>2.5.4.26</oid>
'                                     <utf8>Sample E</utf8>
'                                 </sequence>
'                             </set>
'                             <set>
'                                 <sequence>
'                                     <oid>2.5.4.15</oid>
'                                     <utf8>Sample Business</utf8>
'                                 </sequence>
'                             </set>
'                         </sequence>
'                     </contextSpecific>
'                 </sequence>
'             </asnOctets>
'         </sequence>
'     </sequence>
' </set>

' Use this online tool to generate parsing code from sample XML: 
' Generate Parsing Code from XML