javascript 生成MD5加密

偏执的太偏执、 2021-12-23 13:59 320阅读 0赞

进行HTTP网络通信的时候，调用API向服务器请求数据，有时为了防止API调用过程中被黑客恶意篡改，所请求参数需要进行MD5算法计算，得到摘要签名。服务端会根据请求参数，对签名进行验证，签名不合法的请求将会被拒绝。

但是目前原生JS貌似并没有提供MD5计算相关的函数方法，只能自己实现或者使用前辈大神写好的。网上找了下，找到了这个MD5的javaScript实现[https://www.bootcdn.cn/blueimp-md5/][https_www.bootcdn.cn_blueimp-md5]。

直接上类库代码

![ContractedBlock.gif][] ![ExpandedBlockStart.gif][]

/*
     * 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)

在应用代码中，通过调用以字符串作为参数的MD5方法来计算字符串的MD5值，结果返回32位小写的十六进制值的字符串。

var v1= md5('{"name":"嘻嘻嘻嘻嘻嘻嘻嘻嘻","age":22}'); //56b21847ed32d2d96cf74077b22342eb
       console.log(v1);
       var v2= md5('{"name":"嘻嘻嘻嘻嘻嘻嘻嘻嘻"}');//80b36b8a15ece3158c4e30130d4d4453
       console.log(v2);

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转载于:https://www.cnblogs.com/yeminglong/p/10287874.html

[https_www.bootcdn.cn_blueimp-md5]: https://www.bootcdn.cn/blueimp-md5/
[ContractedBlock.gif]: https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif
[ExpandedBlockStart.gif]: /images/20211223/d3102ca2d86b4f368e6a430610c78128.png
[341068-20180422222739092-1485869140.jpg]: /images/20211223/c42c15a9a0424f2da0236ddabb08aeb1.png