(Ruby) Twofish CFB Mode Encryption

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

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

crypt = Chilkat::CkCrypt2.new()

crypt.put_CryptAlgorithm("twofish")
crypt.put_CipherMode("cfb")
crypt.put_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.put_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 + "\n";

decrypt = Chilkat::CkCrypt2.new()

decrypt.put_CryptAlgorithm("twofish")
decrypt.put_CipherMode("cfb")
decrypt.put_KeyLength(256)
decrypt.put_EncodingMode("hex")
decrypt.SetEncodedIV(ivHex,"hex")
decrypt.SetEncodedKey(keyHex,"hex")

# Now decrypt:
decStr = decrypt.decryptStringENC(encStr)
print decStr + "\n";