(Xojo Plugin) POP3 Verify Signed (S/MIME) Email

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

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM

Dim mailman As New Chilkat.MailMan

//  Any string argument automatically begins the 30-day trial.
Dim success As Boolean
success = mailman.UnlockComponent("30-day trial")
If (success <> True) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

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

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

Dim sa As Chilkat.StringArray

sa = mailman.GetUidls()
If (sa Is Nil ) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

Dim i As Int32
Dim n As Int32
n = sa.Count

Dim email As Chilkat.Email
Dim uidl As String

For i = 0 To n - 1

    uidl = sa.GetString(i)

    email = mailman.FetchEmail(uidl)
    If (email Is Nil ) Then
        System.DebugLog(mailman.LastErrorText)

        Return
    End If

    System.DebugLog(email.From)
    System.DebugLog(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 = True) Then

        System.DebugLog("This email was signed.")

        //  Check to see if the signatures were verified.
        If (email.SignaturesValid = True) Then
            System.DebugLog("Digital signature(s) verified.")

            System.DebugLog("Signer: " + email.SignedBy)

            //  The certificate used for signing may be obtained
            //  by calling email.GetSignedByCert.
            Dim cert As Chilkat.Cert
            cert = email.GetSignedByCert()
            If (cert Is Nil ) Then
                System.DebugLog("Failed to get signing certificate object.")
            Else
                System.DebugLog("Signing cert: " + cert.SubjectCN)

            End If

        Else
            System.DebugLog("Digital signature verification failed.")
        End If

    End If

Next

success = mailman.Pop3EndSession()