* Calculates the raw HMAC-MD5 for the given key and data * * @param {string} k HMAC key * @param {string} d Input string *

* Encodes input string as raw MD5 string * * @param {string} s Input string * @returns {string} Raw MD5 string

* Convert a raw string to a hex string * * @param {string} input Raw input string * @returns {string} Hex encoded string

* Bitwise rotate a 32-bit number to the left. * * @param {number} num 32-bit number * @param {number} cnt Rotation count *