/*
 * 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 */

;(function ($) {
	'use strict'

	/*
	 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
	 * to work around bugs in some JS interpreters.
	 */
	function safeAdd (x, y) {
		var lsw = (x & 0xFFFF) + (y & 0xFFFF)
		var msw = (x >> 16) + (y >> 16) + (lsw >> 16)
		return (msw << 16) | (lsw & 0xFFFF)
	}

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

	/*
	 * These functions implement the four basic operations the algorithm uses.
	 */
	function md5cmn (q, a, b, x, s, t) {
		return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b)
	}
	function md5ff (a, b, c, d, x, s, t) {
		return md5cmn((b & c) | ((~b) & d), a, b, x, s, t)
	}
	function md5gg (a, b, c, d, x, s, t) {
		return md5cmn((b & d) | (c & (~d)), a, b, x, s, t)
	}
	function md5hh (a, b, c, d, x, s, t) {
		return md5cmn(b ^ c ^ d, a, b, x, s, t)
	}
	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.
	 */
	function binlMD5 (x, len) {
		/* append padding */
		x[len >> 5] |= 0x80 << (len % 32)
		x[(((len + 64) >>> 9) << 4) + 14] = len

		var i
		var olda
		var oldb
		var oldc
		var oldd
		var a = 1732584193
		var b = -271733879
		var c = -1732584194
		var 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
	 */
	function binl2rstr (input) {
		var i
		var output = ''
		var 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.
	 */
	function rstr2binl (input) {
		var i
		var output = []
		output[(input.length >> 2) - 1] = undefined
		for (i = 0; i < output.length; i += 1) {
			output[i] = 0
		}
		var 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
	 */
	function rstrMD5 (s) {
		return binl2rstr(binlMD5(rstr2binl(s), s.length * 8))
	}

	/*
	 * Calculate the HMAC-MD5, of a key and some data (raw strings)
	 */
	function rstrHMACMD5 (key, data) {
		var i
		var bkey = rstr2binl(key)
		var ipad = []
		var opad = []
		var 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
	 */
	function rstr2hex (input) {
		var hexTab = '0123456789abcdef'
		var output = ''
		var x
		var 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
	 */
	function str2rstrUTF8 (input) {
		return unescape(encodeURIComponent(input))
	}

	/*
	 * Take string arguments and return either raw or hex encoded strings
	 */
	function rawMD5 (s) {
		return rstrMD5(str2rstrUTF8(s))
	}
	function hexMD5 (s) {
		return rstr2hex(rawMD5(s))
	}
	function rawHMACMD5 (k, d) {
		return rstrHMACMD5(str2rstrUTF8(k), str2rstrUTF8(d))
	}
	function hexHMACMD5 (k, d) {
		return rstr2hex(rawHMACMD5(k, d))
	}

	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));