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

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

Chilkat Python Downloads install with pip pip3 install chilkat or download... Python Module for Windows, MacOS, Linux, Alpine Linux, Solaris

import sys
import chilkat

# 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.someMailServer.com")

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

# sa is a CkStringArray
sa = mailman.GetUidls()
if (mailman.get_LastMethodSuccess() == False):
    print(mailman.lastErrorText())
    sys.exit()

i = 0
while i < sa.get_Count() :

    uidl = sa.getString(i)

    # email is a CkEmail
    email = mailman.FetchEmail(uidl)
    if (mailman.get_LastMethodSuccess() == False):
        print(mailman.lastErrorText())

        sys.exit()

    print(email.ck_from())
    print(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())

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

            # cert is a CkCert
            cert = email.GetSignedByCert()
            if (email.get_LastMethodSuccess() == False):
                print("Failed to get signing certificate object.")
            else:
                print("Signing cert: " + cert.subjectCN())

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

    i = i + 1

mailman.Pop3EndSession()