(PowerBuilder) 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

integer li_rc
oleobject loo_Mailman
integer li_Success
oleobject loo_Sa
oleobject loo_Email
string ls_Uidl
integer i
oleobject loo_Cert

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

loo_Mailman = create oleobject
li_rc = loo_Mailman.ConnectToNewObject("Chilkat_9_5_0.MailMan")
if li_rc < 0 then
    destroy loo_Mailman
    MessageBox("Error","Connecting to COM object failed")
    return
end if

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

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

loo_Sa = loo_Mailman.GetUidls()
if loo_Mailman.LastMethodSuccess = 0 then
    Write-Debug loo_Mailman.LastErrorText
    destroy loo_Mailman
    return
end if

i = 0
do while i < loo_Sa.Count

    ls_Uidl = loo_Sa.GetString(i)

    loo_Email = loo_Mailman.FetchEmail(ls_Uidl)
    if loo_Mailman.LastMethodSuccess = 0 then
        Write-Debug loo_Mailman.LastErrorText
        destroy loo_Sa
        destroy loo_Mailman
        return
    end if

    Write-Debug loo_Email.From
    Write-Debug loo_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 loo_Email.ReceivedSigned = 1 then

        Write-Debug "This email was signed."

        // Check to see if the signatures were verified.
        if loo_Email.SignaturesValid = 1 then
            Write-Debug "Digital signature(s) verified."
            Write-Debug "Signer: " + loo_Email.SignedBy

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

            loo_Cert = loo_Email.GetSignedByCert()
            if loo_Email.LastMethodSuccess = 0 then
                Write-Debug "Failed to get signing certificate object."
            else
                Write-Debug "Signing cert: " + loo_Cert.SubjectCN
                destroy loo_Cert
            end if

        else
            Write-Debug "Digital signature verification failed."
        end if

    end if

    destroy loo_Email
    i = i + 1
loop

destroy loo_Sa

loo_Mailman.Pop3EndSession()


destroy loo_Mailman