* Calculates MD5 value for a given string. * If a key is provided, calculates the HMAC-MD5 value. * Returns a Hex encoded string unless

* Convert a raw string to an array of little-endian words * Characters >255 have their high-byte silently ignored. * * @param {st

* Encode a string as UTF-8 * * @param {string} input Input string * @returns {string} UTF8 string

* Convert an array of little-endian words to a string * * @param {Array<number>} input MD5 Array * @returns {string} MD5 string