(Xojo Plugin) Twofish CFB Mode Encryption

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

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

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

Dim crypt As New Chilkat.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"

Dim ivHex As String
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.
Dim keyHex As String
keyHex = "603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4"
crypt.SetEncodedKey keyHex,"hex"

// Encrypt a string...
Dim encStr As 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")
System.DebugLog(encStr)

Dim decrypt As New Chilkat.Crypt2

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

// Now decrypt:
Dim decStr As String
decStr = decrypt.DecryptStringENC(encStr)
System.DebugLog(decStr)