(Delphi DLL) CSR Get Extension Request

See more CSR Examples

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.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, FileAccess, Csr, Xml;

...

procedure TForm1.Button1Click(Sender: TObject);
var
csr: HCkCsr;
fac: HCkFileAccess;
csrPem: PWideChar;
success: Boolean;
xml: HCkXml;
xmlStr: PWideChar;

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

csr := CkCsr_Create();

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

fac := CkFileAccess_Create();
csrPem := CkFileAccess__readEntireTextFile(fac,'qa_data/csr/sample.pem','utf-8');

success := CkCsr_LoadCsrPem(csr,csrPem);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCsr__lastErrorText(csr));
    Exit;
  end;

xml := CkXml_Create();

success := CkCsr_GetExtensionRequest(csr,xml);
if (success <> True) then
  begin
    Memo1.Lines.Add('CSR has no extensionRequest.');
    Exit;
  end;

xmlStr := CkXml__getXml(xml);
Memo1.Lines.Add(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

CkCsr_Dispose(csr);
CkFileAccess_Dispose(fac);
CkXml_Dispose(xml);

end;