AutoIt

Find Certificate by Email Address

See more Cert Store Examples

Demonstrates how to find a certificate having the specified email address either within the cert's subject email, or the RFC822 name.

In an X.509 certificate, an email address can typically be located in two places:

1. RFC822 Name (Subject Alternative Name extension) -
   • The certificate may include an email address in the Subject Alternative Name (SAN) extension under the RFC822 Name field. This is a modern and preferred method because it allows for flexibility and alignment with security best practices.
   • To find it, Chilkat inspects the SAN extension in the certificate details.
2. Subject (Common Name or Email Address attribute) -
   • Older certificates may store the email address directly in the Subject field, typically under the Email Address attribute ("emailAddress") or, less commonly, the Common Name (CN).
   • This method is less preferred in modern standards but can still be encountered in legacy implementations. Chilkat also searches here for the email address.

Note: Requires Chilkat v10.1.2 or later.

AutoIt

Local $bSuccess = False

$oCertStore = ObjCreate("Chilkat.CertStore")

; This opens the Current User certificate store on Windows,
; On MacOS and iOS it opens the default Keychain.
Local $bReadOnly = False
$bSuccess = $oCertStore.OpenCurrentUserStore($bReadOnly)
If ($bSuccess = False) Then
    ConsoleWrite($oCertStore.LastErrorText & @CRLF)
    Exit
EndIf

; Find the certificate having the specified email address in either the RFC822 Name or in the Subject.
$oJson = ObjCreate("Chilkat.JsonObject")
Local $sEmail_address = "joe@example.com"
$oJson.UpdateString("email",$sEmail_address)

$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oCertStore.FindCert($oJson,$oCert)
If ($bSuccess = True) Then
    ; Show the full distinguished name of the certificate.
    ConsoleWrite("Found: " & $oCert.SubjectDN & @CRLF)
Else
    ConsoleWrite("Not found." & @CRLF)
EndIf