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

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

Chilkat Tcl Extension Downloads Chilkat Tcl Extension Downloads

load ./chilkat.dll

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

set mailman [new_CkMailMan]

# Set the POP3 server's hostname
CkMailMan_put_MailHost $mailman "pop.someMailServer.com"

# Set the POP3 login/password.
CkMailMan_put_PopUsername $mailman "myLogin"
CkMailMan_put_PopPassword $mailman "myPassword"

# sa is a CkStringArray
set sa [CkMailMan_GetUidls $mailman]
if {[CkMailMan_get_LastMethodSuccess $mailman] == 0} then {
    puts [CkMailMan_lastErrorText $mailman]
    delete_CkMailMan $mailman
    exit
}

# email is a CkEmail

set i 0
while {$i < [CkStringArray_get_Count $sa]} {

    set uidl [CkStringArray_getString $sa $i]

    set email [CkMailMan_FetchEmail $mailman $uidl]
    if {[CkMailMan_get_LastMethodSuccess $mailman] == 0} then {
        puts [CkMailMan_lastErrorText $mailman]
        delete_CkStringArray $sa

        delete_CkMailMan $mailman
        exit
    }

    puts [CkEmail_from $email]
    puts [CkEmail_subject $email]

    # 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 {[CkEmail_get_ReceivedSigned $email] == 1} then {

        puts "This email was signed."

        # Check to see if the signatures were verified.
        if {[CkEmail_get_SignaturesValid $email] == 1} then {
            puts "Digital signature(s) verified."
            puts "Signer: [CkEmail_signedBy $email]"

            # The certificate used for signing may be obtained
            # by calling email.GetSignedByCert.
            # cert is a CkCert

            set cert [CkEmail_GetSignedByCert $email]
            if {[CkEmail_get_LastMethodSuccess $email] == 0} then {
                puts "Failed to get signing certificate object."
            }             else {
                puts "Signing cert: [CkCert_subjectCN $cert]"
                delete_CkCert $cert

            }

        }         else {
            puts "Digital signature verification failed."
        }

    }

    delete_CkEmail $email

    set i [expr $i + 1]
}

delete_CkStringArray $sa

CkMailMan_Pop3EndSession $mailman

delete_CkMailMan $mailman