(Chilkat2-Python) Create PKCS7 Signed File (.p7m)

Demonstrates how to sign a file to create a .p7m that contains both the file contents and the signature.

Note: This example requires Chilkat v10.1.2 or greater.

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

import sys
import chilkat2

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

crypt = chilkat2.Crypt2()

certStore = chilkat2.CertStore()

# Load a PFX file into a certificate store object.
success = certStore.LoadPfxFile("myPfx.pfx","pfxPassword")
if (success != True):
    print(certStore.LastErrorText)
    sys.exit()

# Get the certificate by subject common name.
# This should be the cert within the PFX that also
# has a private key (also stored within the PFX).
jsonCN = chilkat2.JsonObject()
jsonCN.UpdateString("CN","myCert")
cert = chilkat2.Cert()
success = certStore.FindCert(jsonCN,cert)
if (success == False):
    print(certStore.LastErrorText)
    sys.exit()

# Tell the crypt object to use the certificate for signing:
success = crypt.SetSigningCert(cert)

# Sign a file, producing a .p7m as output.
# The input file is unchanged, the test.p7m contains the 
# contents of the input file and the signature.
inFile = "test.txt"
outFile = "testp7m"
success = crypt.CreateP7M(inFile,outFile)
if (success != True):
    print(crypt.LastErrorText)
    sys.exit()

print("Success!")