Node.js

AES Encryption

See more Encryption Examples

AES encryption. The Chilkat encryption component supports 128-bit, 192-bit, and 256-bit AES encryption in ECB (Electronic Cookbook), CBC (Cipher-Block Chaining), and other modes. Node.js

NODEJS_PRELUDE

function chilkatExample() {

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

    var crypt = new chilkat.Crypt2();

    //  AES is also known as Rijndael.		
    crypt.CryptAlgorithm = "aes";

    //  CipherMode may be "ecb", "cbc", "ofb", "cfb", "gcm", etc.
    //  Note: Check the online reference documentation to see the Chilkat versions
    //  when certain cipher modes were introduced.
    crypt.CipherMode = "cbc";

    //  KeyLength may be 128, 192, 256
    crypt.KeyLength = 256;

    //  The padding scheme determines the contents of the bytes
    //  that are added to pad the result to a multiple of the
    //  encryption algorithm's block size.  AES has a block
    //  size of 16 bytes, so encrypted output is always
    //  a multiple of 16.
    crypt.PaddingScheme = 0;

    //  EncodingMode specifies the encoding of the output for
    //  encryption, and the input for decryption.
    //  It may be "hex", "url", "base64", or "quoted-printable".
    crypt.EncodingMode = "hex";

    //  An initialization vector is required if using CBC mode.
    //  ECB mode does not use an IV.
    //  The length of the IV is equal to the algorithm's block size.
    //  It is NOT equal to the length of the key.
    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.
    //  For 128-bit encryption, the binary secret key is 16 bytes.
    var keyHex = "000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F";
    crypt.SetEncodedKey(keyHex,"hex");

    //  Encrypt a string...
    //  The input string is 44 ANSI characters (i.e. 44 bytes), so
    //  the output should be 48 bytes (a multiple of 16).
    //  Because the output is a hex string, it should
    //  be 96 characters long (2 chars per byte).
    var encStr = crypt.EncryptStringENC("The quick brown fox jumps over the lazy dog.");
    console.log(encStr);

    //  This is the encrypted output in hex format:
    //  4846F83AA211E239AA62A21F527F089EE9DDBEAD30EE15D4E79B607A621B97BEDB9B6F00A9B21F1B43A50B4C1BE0EDF2

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

    //  This is the decrypted string:
    //  The quick brown fox jumps over the lazy dog.

}

chilkatExample();