(CkPython) AddDetachedSignaturePk

Demonstrates how to add a detached signature using a certifcate and it's corresponding private key. The easiest way of doing it is when both the certificate and private key are contained together within a PFX (.pfx or .p12) file. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key.

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

mime = chilkat.CkMime()

# Load the certificate from a .cer file.
cert = chilkat.CkCert()
success = cert.LoadFromFile("aaworkarea/myCert.cer")
if (success == False):
    print(cert.lastErrorText())
    sys.exit()

# Load the private key from an encrypted PEM file.
# (A private key can be loaded from other file formats also..)
privKey = chilkat.CkPrivateKey()
success = privKey.LoadEncryptedPemFile("aaworkarea/myPrivateKey.pem","myPassword")
if (success == False):
    print(privKey.lastErrorText())
    sys.exit()

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

# Sign the MIME (adds a PKCS7 detached signature)
success = mime.AddDetachedSignaturePk(cert,privKey)
if (success == False):
    print(mime.lastErrorText())
    sys.exit()

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

print("success!")