(CkPython) Workaround for the deprecated Crypt2.SignBytes method

Shows how to replace the deprecated SignBytes method. (Chilkat is moving away from the use of CkByteData.)

Note: This example requires Chilkat v11.0.0 or greater.

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

import chilkat

crypt = chilkat.CkCrypt2()

cert = chilkat.CkCert()
# ...
# Load the cert from a source such as a .pfx/.p12 file, smart card, USB token, Apple keychain, Windows certificate store, etc.
# 
success = crypt.SetSigningCert(cert)

crypt.put_HashAlgorithm("sha256")

path = "c:/someDir/example.dat"

# ------------------------------------------------------------------------
# The SignBytes method is deprecated:

inData = chilkat.CkByteData()
inData.loadFile(path)

outData = chilkat.CkByteData()

success = crypt.SignBytes(inData,outData)

# ------------------------------------------------------------------------
# Workaround.
# (Chilkat is moving away from using CkByteData)

bdIn = chilkat.CkBinData()
bdIn.LoadFile(path)

crypt.put_EncodingMode("base64")
base64_sig = crypt.signBdENC(bdIn)

# If you want to access the bytes...
bdSig = chilkat.CkBinData()
bdSig.AppendEncoded(base64_sig,"base64")