(Delphi DLL) Subject Alternative Name

Demonstrates the usage of the SubjectAlternativeName property to get the certificate SAN (subject alternative name) as XML.

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, Cert, Xml;

...

procedure TForm1.Button1Click(Sender: TObject);
var
cert: HCkCert;
success: Boolean;
subjectAltNameXml: PWideChar;
xml: HCkXml;
oid: PWideChar;
name: PWideChar;
i: Integer;
count_i: Integer;
rfc822Name: PWideChar;

begin
// Note: Not all certificates contain a Subject Alternative Name.
// If it does not, the SubjectAlternativeName property will contain the empty string.

cert := CkCert_Create();

success := CkCert_LoadFromFile(cert,'qa_data/certs/testIcpBrasil.cer');
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

subjectAltNameXml := CkCert__subjectAlternativeName(cert);

Memo1.Lines.Add(subjectAltNameXml);

// Here's a sample of the subjectAltNameXml:

// <?xml version="1.0" encoding="utf-8"?>
// <SubjectAltName>
//     <name type="oid" oid="2.16.76.1.3.4">...</name>
//     <name type="oid" oid="2.16.76.1.3.2">...</name>
//     <name type="oid" oid="2.16.76.1.3.3">...</name>
//     <name type="oid" oid="2.16.76.1.3.7">...</name>
//     <rfc822Name>...</rfc822Name>
// </SubjectAltName>

// The XML can be parsed like this:

xml := CkXml_Create();

CkXml_LoadXml(xml,subjectAltNameXml);

i := 0;
count_i := CkXml_NumChildrenHavingTag(xml,'name');
while i < count_i do
  begin
    CkXml_putI(xml,i);
    oid := CkXml__chilkatPath(xml,'name[i]|(oid)');
    name := CkXml__getChildContent(xml,'name[i]');
    i := i + 1;
  end;

rfc822Name := CkXml__getChildContent(xml,'rfc822Name');

CkCert_Dispose(cert);
CkXml_Dispose(xml);

end;