(Perl) Twofish OFB Output Feedback Mode Encryption

Demonstrates how to encrypt using Twofish OFB (Output Feedback) mode.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux

use 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");
# Set the cipher mode to Output Feedback
$crypt->put_CipherMode("ofb");
$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("Without music to decorate it, time is just a bunch of boring production deadlines or dates by which bills must be paid. -- Frank Zappa");
print $encStr . "\r\n";

$decrypt = chilkat::CkCrypt2->new();
$decrypt->put_CryptAlgorithm("twofish");
$decrypt->put_CipherMode("ofb");
$decrypt->put_KeyLength(256);
$decrypt->put_EncodingMode("hex");
$decrypt->SetEncodedIV($ivHex,"hex");
$decrypt->SetEncodedKey($keyHex,"hex");

# Now decrypt:
$decStr = $decrypt->decryptStringENC($encStr);
print $decStr . "\r\n";