JavaScript

AES CFB Mode Encryption

See more Encryption Examples

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

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

var crypt = new CkCrypt2();

crypt.CryptAlgorithm = "aes";
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";

var 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.
var keyHex = "603deb1015ca71be2b73aef0857d77811f352c073b6108d72d9810a30914dff4";
crypt.SetEncodedKey(keyHex,"hex");

// Encrypt a string...
var encStr = crypt.EncryptStringENC("Good night, good night! parting is such sweet sorrow, That I shall say good night till it be morrow. --  William Shakespeare");
console.log(encStr);

var decrypt = new CkCrypt2();

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

// Now decrypt:
var decStr = decrypt.DecryptStringENC(encStr);
console.log(decStr);