(Classic ASP) POP3 Verify Signed (S/MIME) Email

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

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

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

set mailman = Server.CreateObject("Chilkat.MailMan")

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

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

set stUidls = Server.CreateObject("Chilkat.StringTable")
success = mailman.FetchUidls(stUidls)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( mailman.LastErrorText) & "</pre>"
    Response.End
End If

set email = Server.CreateObject("Chilkat.Email")
set cert = Server.CreateObject("Chilkat.Cert")

count = stUidls.Count
i = 0
Do While i < count
    ' Download the full email.
    success = mailman.FetchByUidl(stUidls.StringAt(i),0,0,email)
    If (success = 0) Then
        Response.Write "<pre>" & Server.HTMLEncode( mailman.LastErrorText) & "</pre>"
        Response.End
    End If

    Response.Write "<pre>" & Server.HTMLEncode( i) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "From: " & email.From) & "</pre>"
    Response.Write "<pre>" & Server.HTMLEncode( "Subject: " & email.Subject) & "</pre>"

    ' 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

        Response.Write "<pre>" & Server.HTMLEncode( "This email was signed.") & "</pre>"

        ' Check to see if the signatures were verified.
        If (email.SignaturesValid = 1) Then
            Response.Write "<pre>" & Server.HTMLEncode( "Digital signature(s) verified.") & "</pre>"
            Response.Write "<pre>" & Server.HTMLEncode( "Signer: " & email.SignedBy) & "</pre>"

            success = email.LastSignerCert(0,cert)
            If (success = 0) Then
                Response.Write "<pre>" & Server.HTMLEncode( email.LastErrorText) & "</pre>"
                Response.End
            End If

            Response.Write "<pre>" & Server.HTMLEncode( "Signing cert: " & cert.SubjectCN) & "</pre>"
        End If

    Else
        Response.Write "<pre>" & Server.HTMLEncode( "Digital signature verification failed.") & "</pre>"
    End If

    i = i + 1
Loop

success = mailman.Pop3EndSession()

%>
</body>
</html>