(Chilkat2-Python) Add S/MIME Signature using PFX

Add a digital signature to a MIME message using the certificate + private key from a PFX file.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

mime = chilkat2.Mime()

# Load a PFX file into a certificate object.
cert = chilkat2.Cert()
pfxFilepath = "pfxFiles/something.pfx"
pfxPassword = "secret"
success = cert.LoadPfxFile(pfxFilepath,pfxPassword)
if (success == False):
    print(cert.LastErrorText)
    sys.exit()

success = mime.SetBodyFromPlainText("This is the plain-text MIME body.")

mime.Charset = "utf-8"
mime.Encoding = "quoted-printable"

# Sign the MIME (adds a PKCS7 detached signature)
success = mime.AddDetachedSignature(cert)
if (success == False):
    print(mime.LastErrorText)
    sys.exit()

# Save the S/MIME to a file.
success = mime.SaveMime("/temp/signedMime.txt")
if (success == False):
    print(mime.LastErrorText)
    sys.exit()

print("success!")