(VBScript) POP3 Verify Signed (S/MIME) Email

Demonstrates how to download and verify digitally signed S/MIME email.

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

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

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

set mailman = CreateObject("Chilkat_9_5_0.MailMan")

' Set the POP3 server's hostname
mailman.MailHost = "pop.someMailServer.com"

' Set the POP3 login/password.
mailman.PopUsername = "myLogin"
mailman.PopPassword = "myPassword"

' sa is a Chilkat_9_5_0.StringArray
Set sa = mailman.GetUidls()
If (mailman.LastMethodSuccess = 0) Then
    outFile.WriteLine(mailman.LastErrorText)
    WScript.Quit
End If

i = 0
Do While i < sa.Count

    uidl = sa.GetString(i)

    ' email is a Chilkat_9_5_0.Email
    Set email = mailman.FetchEmail(uidl)
    If (mailman.LastMethodSuccess = 0) Then
        outFile.WriteLine(mailman.LastErrorText)

        WScript.Quit
    End If

    outFile.WriteLine(email.From)
    outFile.WriteLine(email.Subject)

    ' The security layers of signed and/or encrypted emails
    ' are automatically "unwrapped" when loaded into
    ' a Chilkat email object.
    ' An application only needs to check to see if an email
    ' was received signed or encrypted, and then examine
    ' the success/failure.  For example:
    If (email.ReceivedSigned = 1) Then

        outFile.WriteLine("This email was signed.")

        ' Check to see if the signatures were verified.
        If (email.SignaturesValid = 1) Then
            outFile.WriteLine("Digital signature(s) verified.")
            outFile.WriteLine("Signer: " & email.SignedBy)

            ' The certificate used for signing may be obtained
            ' by calling email.GetSignedByCert.

            ' cert is a Chilkat_9_5_0.Cert
            Set cert = email.GetSignedByCert()
            If (email.LastMethodSuccess = 0) Then
                outFile.WriteLine("Failed to get signing certificate object.")
            Else
                outFile.WriteLine("Signing cert: " & cert.SubjectCN)

            End If

        Else
            outFile.WriteLine("Digital signature verification failed.")
        End If

    End If

    i = i + 1
Loop

success = mailman.Pop3EndSession()

outFile.Close