(CkPython) Decrypt a .p7m File (using a PFX)

CkPython sample code showing how to decrypt a .p7m using a .p12 / .pfx certificate w/ 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 requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

crypt = chilkat.CkCrypt2()

# Use a digital certificate and private key from a PFX file (.pfx or .p12).
pfxPath = "myCertAndKey.pfx"
pfxPassword = "test123"

success = crypt.AddPfxSourceFile(pfxPath,pfxPassword)
if (success != True):
    print(crypt.lastErrorText())
    sys.exit()

# Set the  outPath to whatever is appropriate.
# If you are decrypting a PDF, your output might be "out.pdf"...
inPath = "smime.p7m"
outPath = "original.txt"

# Indicate that we're doing public key decryption (i.e. PKCS7)
crypt.put_CryptAlgorithm("pki")

success = crypt.CkDecryptFile(inPath,outPath)
if (success == False):
    print(crypt.lastErrorText())
    sys.exit()

print("Success.")