/*
 * JavaScript MD5
 * https://github.com/blueimp/JavaScript-MD5
 *
 * Copyright 2011, Sebastian Tschan
 * https://blueimp.net
 *
 * Licensed under the MIT license:
 * https://opensource.org/licenses/MIT
 *
 * Based on
 * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
 * Digest Algorithm, as defined in RFC 1321.
 * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */

/* global define */

/* eslint-disable strict */

;(function($) {
	'use strict';

	/**
   * Add integers, wrapping at 2^32.
   * This uses 16-bit operations internally to work around bugs in interpreters.
   *
   * @param {number} x First integer
   * @param {number} y Second integer
   * @return {number} Sum
   */
	function safeAdd(x, y) {
		const lsw = (x & 0xffff) + (y & 0xffff);
		const msw = (x >> 16) + (y >> 16) + (lsw >> 16);
		return (msw << 16) | (lsw & 0xffff);
	}

	/**
   * Bitwise rotate a 32-bit number to the left.
   *
   * @param {number} num 32-bit number
   * @param {number} cnt Rotation count
   * @return {number} Rotated number
   */
	function bitRotateLeft(num, cnt) {
		return (num << cnt) | (num >>> (32 - cnt));
	}

	/**
   * Basic operation the algorithm uses.
   *
   * @param {number} q q
   * @param {number} a a
   * @param {number} b b
   * @param {number} x x
   * @param {number} s s
   * @param {number} t t
   * @return {number} Result
   */
	function md5cmn(q, a, b, x, s, t) {
		return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b);
	}
	/**
   * Basic operation the algorithm uses.
   *
   * @param {number} a a
   * @param {number} b b
   * @param {number} c c
   * @param {number} d d
   * @param {number} x x
   * @param {number} s s
   * @param {number} t t
   * @return {number} Result
   */
	function md5ff(a, b, c, d, x, s, t) {
		return md5cmn((b & c) | (~b & d), a, b, x, s, t);
	}
	/**
   * Basic operation the algorithm uses.
   *
   * @param {number} a a
   * @param {number} b b
   * @param {number} c c
   * @param {number} d d
   * @param {number} x x
   * @param {number} s s
   * @param {number} t t
   * @return {number} Result
   */
	function md5gg(a, b, c, d, x, s, t) {
		return md5cmn((b & d) | (c & ~d), a, b, x, s, t);
	}
	/**
   * Basic operation the algorithm uses.
   *
   * @param {number} a a
   * @param {number} b b
   * @param {number} c c
   * @param {number} d d
   * @param {number} x x
   * @param {number} s s
   * @param {number} t t
   * @return {number} Result
   */
	function md5hh(a, b, c, d, x, s, t) {
		return md5cmn(b ^ c ^ d, a, b, x, s, t);
	}
	/**
   * Basic operation the algorithm uses.
   *
   * @param {number} a a
   * @param {number} b b
   * @param {number} c c
   * @param {number} d d
   * @param {number} x x
   * @param {number} s s
   * @param {number} t t
   * @return {number} Result
   */
	function md5ii(a, b, c, d, x, s, t) {
		return md5cmn(c ^ (b | ~d), a, b, x, s, t);
	}

	/**
   * Calculate the MD5 of an array of little-endian words, and a bit length.
   *
   * @param {Array} x Array of little-endian words
   * @param {number} len Bit length
   * @return {Array<number>} MD5 Array
   */
	function binlMD5(x, len) {
		/* append padding */
		x[len >> 5] |= 0x80 << len % 32;
		x[(((len + 64) >>> 9) << 4) + 14] = len;

		let i;
		let olda;
		let oldb;
		let oldc;
		let oldd;
		let a = 1732584193;
		let b = -271733879;
		let c = -1732584194;
		let d = 271733878;

		for (i = 0; i < x.length; i += 16) {
			olda = a;
			oldb = b;
			oldc = c;
			oldd = d;

			a = md5ff(a, b, c, d, x[i], 7, -680876936);
			d = md5ff(d, a, b, c, x[i + 1], 12, -389564586);
			c = md5ff(c, d, a, b, x[i + 2], 17, 606105819);
			b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330);
			a = md5ff(a, b, c, d, x[i + 4], 7, -176418897);
			d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426);
			c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341);
			b = md5ff(b, c, d, a, x[i + 7], 22, -45705983);
			a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416);
			d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417);
			c = md5ff(c, d, a, b, x[i + 10], 17, -42063);
			b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162);
			a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682);
			d = md5ff(d, a, b, c, x[i + 13], 12, -40341101);
			c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290);
			b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329);

			a = md5gg(a, b, c, d, x[i + 1], 5, -165796510);
			d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632);
			c = md5gg(c, d, a, b, x[i + 11], 14, 643717713);
			b = md5gg(b, c, d, a, x[i], 20, -373897302);
			a = md5gg(a, b, c, d, x[i + 5], 5, -701558691);
			d = md5gg(d, a, b, c, x[i + 10], 9, 38016083);
			c = md5gg(c, d, a, b, x[i + 15], 14, -660478335);
			b = md5gg(b, c, d, a, x[i + 4], 20, -405537848);
			a = md5gg(a, b, c, d, x[i + 9], 5, 568446438);
			d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690);
			c = md5gg(c, d, a, b, x[i + 3], 14, -187363961);
			b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501);
			a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467);
			d = md5gg(d, a, b, c, x[i + 2], 9, -51403784);
			c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473);
			b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734);

			a = md5hh(a, b, c, d, x[i + 5], 4, -378558);
			d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463);
			c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562);
			b = md5hh(b, c, d, a, x[i + 14], 23, -35309556);
			a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060);
			d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353);
			c = md5hh(c, d, a, b, x[i + 7], 16, -155497632);
			b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640);
			a = md5hh(a, b, c, d, x[i + 13], 4, 681279174);
			d = md5hh(d, a, b, c, x[i], 11, -358537222);
			c = md5hh(c, d, a, b, x[i + 3], 16, -722521979);
			b = md5hh(b, c, d, a, x[i + 6], 23, 76029189);
			a = md5hh(a, b, c, d, x[i + 9], 4, -640364487);
			d = md5hh(d, a, b, c, x[i + 12], 11, -421815835);
			c = md5hh(c, d, a, b, x[i + 15], 16, 530742520);
			b = md5hh(b, c, d, a, x[i + 2], 23, -995338651);

			a = md5ii(a, b, c, d, x[i], 6, -198630844);
			d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415);
			c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905);
			b = md5ii(b, c, d, a, x[i + 5], 21, -57434055);
			a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571);
			d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606);
			c = md5ii(c, d, a, b, x[i + 10], 15, -1051523);
			b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799);
			a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359);
			d = md5ii(d, a, b, c, x[i + 15], 10, -30611744);
			c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380);
			b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649);
			a = md5ii(a, b, c, d, x[i + 4], 6, -145523070);
			d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379);
			c = md5ii(c, d, a, b, x[i + 2], 15, 718787259);
			b = md5ii(b, c, d, a, x[i + 9], 21, -343485551);

			a = safeAdd(a, olda);
			b = safeAdd(b, oldb);
			c = safeAdd(c, oldc);
			d = safeAdd(d, oldd);
		}
		return [a, b, c, d];
	}

	/**
   * Convert an array of little-endian words to a string
   *
   * @param {Array<number>} input MD5 Array
   * @return {string} MD5 string
   */
	function binl2rstr(input) {
		let i;
		let output = '';
		const length32 = input.length * 32;
		for (i = 0; i < length32; i += 8) {
			output += String.fromCharCode((input[i >> 5] >>> i % 32) & 0xff);
		}
		return output;
	}

	/**
   * Convert a raw string to an array of little-endian words
   * Characters >255 have their high-byte silently ignored.
   *
   * @param {string} input Raw input string
   * @return {Array<number>} Array of little-endian words
   */
	function rstr2binl(input) {
		let i;
		const output = [];
		output[(input.length >> 2) - 1] = undefined;
		for (i = 0; i < output.length; i += 1) {
			output[i] = 0;
		}
		const length8 = input.length * 8;
		for (i = 0; i < length8; i += 8) {
			output[i >> 5] |= (input.charCodeAt(i / 8) & 0xff) << i % 32;
		}
		return output;
	}

	/**
   * Calculate the MD5 of a raw string
   *
   * @param {string} s Input string
   * @return {string} Raw MD5 string
   */
	function rstrMD5(s) {
		return binl2rstr(binlMD5(rstr2binl(s), s.length * 8));
	}

	/**
   * Calculates the HMAC-MD5 of a key and some data (raw strings)
   *
   * @param {string} key HMAC key
   * @param {string} data Raw input string
   * @return {string} Raw MD5 string
   */
	function rstrHMACMD5(key, data) {
		let i;
		let bkey = rstr2binl(key);
		const ipad = [];
		const opad = [];
		let hash;
		ipad[15] = opad[15] = undefined;
		if (bkey.length > 16) {
			bkey = binlMD5(bkey, key.length * 8);
		}
		for (i = 0; i < 16; i += 1) {
			ipad[i] = bkey[i] ^ 0x36363636;
			opad[i] = bkey[i] ^ 0x5c5c5c5c;
		}
		hash = binlMD5(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
		return binl2rstr(binlMD5(opad.concat(hash), 512 + 128));
	}

	/**
   * Convert a raw string to a hex string
   *
   * @param {string} input Raw input string
   * @return {string} Hex encoded string
   */
	function rstr2hex(input) {
		const hexTab = '0123456789abcdef';
		let output = '';
		let x;
		let i;
		for (i = 0; i < input.length; i += 1) {
			x = input.charCodeAt(i);
			output += hexTab.charAt((x >>> 4) & 0x0f) + hexTab.charAt(x & 0x0f);
		}
		return output;
	}

	/**
   * Encode a string as UTF-8
   *
   * @param {string} input Input string
   * @return {string} UTF8 string
   */
	function str2rstrUTF8(input) {
		return unescape(encodeURIComponent(input));
	}

	/**
   * Encodes input string as raw MD5 string
   *
   * @param {string} s Input string
   * @return {string} Raw MD5 string
   */
	function rawMD5(s) {
		return rstrMD5(str2rstrUTF8(s));
	}
	/**
   * Encodes input string as Hex encoded string
   *
   * @param {string} s Input string
   * @return {string} Hex encoded string
   */
	function hexMD5(s) {
		return rstr2hex(rawMD5(s));
	}
	/**
   * Calculates the raw HMAC-MD5 for the given key and data
   *
   * @param {string} k HMAC key
   * @param {string} d Input string
   * @return {string} Raw MD5 string
   */
	function rawHMACMD5(k, d) {
		return rstrHMACMD5(str2rstrUTF8(k), str2rstrUTF8(d));
	}
	/**
   * Calculates the Hex encoded HMAC-MD5 for the given key and data
   *
   * @param {string} k HMAC key
   * @param {string} d Input string
   * @return {string} Raw MD5 string
   */
	function hexHMACMD5(k, d) {
		return rstr2hex(rawHMACMD5(k, d));
	}

	/**
   * Calculates MD5 value for a given string.
   * If a key is provided, calculates the HMAC-MD5 value.
   * Returns a Hex encoded string unless the raw argument is given.
   *
   * @param {string} string Input string
   * @param {string} [key] HMAC key
   * @param {boolean} [raw] Raw output switch
   * @return {string} MD5 output
   */
	function md5(string, key, raw) {
		if (!key) {
			if (!raw) {
				return hexMD5(string);
			}
			return rawMD5(string);
		}
		if (!raw) {
			return hexHMACMD5(key, string);
		}
		return rawHMACMD5(key, string);
	}

	if (typeof define === 'function' && define.amd) {
		define(function() {
			return md5;
		});
	} else if (typeof module === 'object' && module.exports) {
		module.exports = md5;
	} else {
		$.md5 = md5;
	}
})(this);
