(Visual Basic 6.0) Find Certificate by Email Address

Locate the certificate containing the specified email address in either the RFC822 Name or the Subject.

Note: This example requires Chilkat v10.1.2 or later.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim certStore As New ChilkatCertStore

' This opens the Current User certificate store on Windows,
' On MacOS and iOS it opens the default Keychain.
Dim readOnly As Long
readOnly = 1
Dim success As Long
success = certStore.OpenCurrentUserStore(readOnly)
If (success = 0) Then
    Debug.Print certStore.LastErrorText
    Exit Sub
End If

' Locate the certificate containing the specified email address in either the RFC822 Name or the Subject.
Dim json As New ChilkatJsonObject
Dim email_address As String
email_address = "harold@example.com"
success = json.UpdateString("email",email_address)

Dim cert As New ChilkatCert
success = certStore.FindCert(json,cert)
If (success = 1) Then
    ' Show the full distinguished name of the certificate.
    Debug.Print "Found: " & cert.SubjectDN
Else
    Debug.Print "Not found."
End If