(Chilkat2-Python) Twofish CFB Mode Encryption

Demonstrates how to encrypt using Twofish CFB (Cipher Feedback) mode.

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

import chilkat2

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

crypt = chilkat2.Crypt2()

crypt.CryptAlgorithm = "twofish"
crypt.CipherMode = "cfb"
crypt.KeyLength = 256

# EncodingMode specifies the encoding of the output for
# encryption, and the input for decryption.
# It may be "hex", "url", "base64", "quoted-printable", or many other choices.
crypt.EncodingMode = "hex"

ivHex = "000102030405060708090A0B0C0D0E0F"
crypt.SetEncodedIV(ivHex,"hex")

# The secret key must equal the size of the key.  For
# 256-bit encryption, the binary secret key is 32 bytes.
keyHex = "603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4"
crypt.SetEncodedKey(keyHex,"hex")

# Encrypt a string...
encStr = crypt.EncryptStringENC("We must face the fact that the preservation of individual freedom is incompatible with a full satisfaction of our views of distributive justice. -- Friedrich Hayek")
print(encStr)

decrypt = chilkat2.Crypt2()

decrypt.CryptAlgorithm = "twofish"
decrypt.CipherMode = "cfb"
decrypt.KeyLength = 256
decrypt.EncodingMode = "hex"
decrypt.SetEncodedIV(ivHex,"hex")
decrypt.SetEncodedKey(keyHex,"hex")

# Now decrypt:
decStr = decrypt.DecryptStringENC(encStr)
print(decStr)