CkPython

POP3 Verify Signed (S/MIME) Email

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

import sys
import chilkat

success = False

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

mailman = chilkat.CkMailMan()

# Set the POP3 server's hostname
mailman.put_MailHost("pop.example.com")

# Set the POP3 login/password.
mailman.put_PopUsername("myLogin")
mailman.put_PopPassword("myPassword")

stUidls = chilkat.CkStringTable()
success = mailman.FetchUidls(stUidls)
if (success == False):
    print(mailman.lastErrorText())
    sys.exit()

email = chilkat.CkEmail()
cert = chilkat.CkCert()

count = stUidls.get_Count()
i = 0
while i < count :
    # Download the full email.
    success = mailman.FetchByUidl(stUidls.stringAt(i),False,0,email)
    if (success == False):
        print(mailman.lastErrorText())
        sys.exit()

    print(str(i))
    print("From: " + email.ck_from())
    print("Subject: " + 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.get_ReceivedSigned() == True):

        print("This email was signed.")

        # Check to see if the signatures were verified.
        if (email.get_SignaturesValid() == True):
            print("Digital signature(s) verified.")
            print("Signer: " + email.signedBy())

            success = email.LastSignerCert(0,cert)
            if (success == False):
                print(email.lastErrorText())
                sys.exit()

            print("Signing cert: " + cert.subjectCN())

    else:
        print("Digital signature verification failed.")

    i = i + 1

mailman.Pop3EndSession()