(DataFlex) 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

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoMailman
    Boolean iSuccess
    Variant vSa
    Handle hoSa
    Variant vEmail
    Handle hoEmail
    String sUidl
    Integer i
    Variant vCert
    Handle hoCert
    String sTemp1
    Boolean bTemp1

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

    Get Create (RefClass(cComChilkatMailMan)) To hoMailman
    If (Not(IsComObjectCreated(hoMailman))) Begin
        Send CreateComObject of hoMailman
    End

    // Set the POP3 server's hostname
    Set ComMailHost Of hoMailman To "pop.someMailServer.com"

    // Set the POP3 login/password.
    Set ComPopUsername Of hoMailman To "myLogin"
    Set ComPopPassword Of hoMailman To "myPassword"

    Get ComGetUidls Of hoMailman To vSa
    If (IsComObject(vSa)) Begin
        Get Create (RefClass(cComCkStringArray)) To hoSa
        Set pvComObject Of hoSa To vSa
    End
    Get ComLastMethodSuccess Of hoMailman To bTemp1
    If (bTemp1 = False) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Move 0 To i
    While (i < (ComCount(hoSa)))

        Get ComGetString Of hoSa i To sUidl

        Get ComFetchEmail Of hoMailman sUidl To vEmail
        If (IsComObject(vEmail)) Begin
            Get Create (RefClass(cComChilkatEmail)) To hoEmail
            Set pvComObject Of hoEmail To vEmail
        End
        Get ComLastMethodSuccess Of hoMailman To bTemp1
        If (bTemp1 = False) Begin
            Get ComLastErrorText Of hoMailman To sTemp1
            Showln sTemp1
            Send Destroy of hoSa
            Procedure_Return
        End

        Get ComFrom Of hoEmail To sTemp1
        Showln sTemp1
        Get ComSubject Of hoEmail To sTemp1
        Showln sTemp1

        // 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:
        Get ComReceivedSigned Of hoEmail To bTemp1
        If (bTemp1 = True) Begin

            Showln "This email was signed."

            // Check to see if the signatures were verified.
            Get ComSignaturesValid Of hoEmail To bTemp1
            If (bTemp1 = True) Begin
                Showln "Digital signature(s) verified."
                Get ComSignedBy Of hoEmail To sTemp1
                Showln "Signer: " sTemp1

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

                Get ComGetSignedByCert Of hoEmail To vCert
                If (IsComObject(vCert)) Begin
                    Get Create (RefClass(cComChilkatCert)) To hoCert
                    Set pvComObject Of hoCert To vCert
                End
                Get ComLastMethodSuccess Of hoEmail To bTemp1
                If (bTemp1 = False) Begin
                    Showln "Failed to get signing certificate object."
                End
                Else Begin
                    Get ComSubjectCN Of hoCert To sTemp1
                    Showln "Signing cert: " sTemp1
                    Send Destroy of hoCert
                End

            End
            Else Begin
                Showln "Digital signature verification failed."
            End

        End

        Send Destroy of hoEmail
        Move (i + 1) To i
    Loop

    Send Destroy of hoSa

    Get ComPop3EndSession Of hoMailman To iSuccess


End_Procedure