AES implementation in JavaScript
Usage: this implementation would be invoked as follows:
var password = 'L0ck it up saf3';
var plaintext = 'pssst ... đon’t tell anyøne!';
var ciphertext = Aes.Ctr.encrypt(plaintext, password, 256);
var origtext = Aes.Ctr.decrypt(ciphertext, password, 256);
/**
* Encrypt a text using AES encryption in Counter mode of operation.
*
* Unicode multi-byte character safe
*
* @param {string} plaintext - Source text to be encrypted.
* @param {string} password - The password to use to generate a key for encryption.
* @param {number} nBits - Number of bits to be used in the key; 128 / 192 / 256.
* @returns {string} Encrypted text.
*
* @example
* var encr = Aes.Ctr.encrypt('big secret', 'pāşšŵōřđ', 256); // 'lwGl66VVwVObKIr6of8HVqJr'
*/
/**
* Decrypt a text encrypted by AES in counter mode of operation
*
* @param {string} ciphertext - Cipher text to be decrypted.
* @param {string} password - Password to use to generate a key for decryption.
* @param {number} nBits - Number of bits to be used in the key; 128 / 192 / 256.
* @returns {string} Decrypted text
*
* @example
* var decr = Aes.Ctr.decrypt('lwGl66VVwVObKIr6of8HVqJr', 'pāşšŵōřđ', 256); // 'big secret'
*/