Delphi DLL

Subject Alternative Name for ICP Brasil Certs

See more Certificates Examples

Demonstrates how to access the multiple names contained in the Subject Alternative Name of a certificate. This example is for an ICP Brasil certificate. Delphi 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
success: Boolean;
cert: HCkCert;
subjectAltNameXml: PWideChar;
xml: HCkXml;
oid: PWideChar;
name: PWideChar;
i: Integer;
count_i: Integer;

begin
success := False;

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;

// If the cert's Subject Alternative Name contains multiple values, each specified by an OID,
// then the Rfc822Name property returns XML.
subjectAltNameXml := CkCert__rfc822Name(cert);

Memo1.Lines.Add(subjectAltNameXml);

// Here's a sample of the subjectAltNameXml:

// <SubjectAltName>
//     <name type="oid" oid="2.16.76.1.3.4">290999653223955019700000000000000000000150424SRJUXPTS</name>
//     <name type="oid" oid="2.16.76.1.3.2">JOAO SILVA</name>
//     <name type="oid" oid="2.16.76.1.3.3">02408939000115</name>
//     <name type="oid" oid="2.16.76.1.3.7">000000000000</name>
// </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]');
    Memo1.Lines.Add(oid + ': ' + name);
    i := i + 1;
  end;

CkCert_Dispose(cert);
CkXml_Dispose(xml);

end;