(Xojo Plugin) Blowfish CFB Mode Encryption

Demonstrates how to encrypt using Blowfish 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

// Use "blowfish2" to produce correct results that match published blowfish test vectors.
crypt.CryptAlgorithm = "blowfish2"
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"

// The block size of the blowfish algoirthm is 8 bytes, therefore the IV is 8 bytes.
Dim ivHex As String
ivHex = "0001020304050607"
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("In all intellectual debates, both sides tend to be correct in what they affirm, and wrong in what they deny. -- John Stuart Mill")
System.DebugLog(encStr)

Dim decrypt As New Chilkat.Crypt2

decrypt.CryptAlgorithm = "blowfish2"
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)