对sessionStorage 缓存的值进行加密

蔚落 2021-10-08 06:50 503阅读 0赞

1  引入加密文件（md5.js）
    <script type="text/ecmascript" src="${pageContext.request.contextPath}/js/md5.js"></script>
    
    2.定义个字符串 接收加密后的字符
    例如：data=[{"staffCode":"admin","staffName":"超级用户","staffPassword":"666"},null,null,{"interval":"1800"}]
    对 staffCode 和 staffPassword进行加密
    
    var staffCode= hex_md5("" + data[0].staffCode);
    var staffPassword= hex_md5("" + data[0].staffPassword);
    var newjsondata=[{"staffCode":staffCode,"staffName":data[0].staffName,"staffPassword":staffPassword},data[1],data[2],data[data.lengt-1]]
    
    sessionStorage.setItem("userId", JSON.stringify(newjsondata));

3.md5.js文件

/*
     * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
     * Digest Algorithm, as defined in RFC 1321.
     * Version 2.1 Copyright (C) Paul Johnston 1999 - 2002.
     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
     * Distributed under the BSD License
     * See http://pajhome.org.uk/crypt/md5 for more info.
     */
    
    /*
     * Configurable variables. You may need to tweak these to be compatible with
     * the server-side, but the defaults work in most cases.
     */
    var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
    var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
    var chrsz   = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode      */
    
    /*
     * These are the functions you'll usually want to call
     * They take string arguments and return either hex or base-64 encoded strings
     */
    function hex_md5(s){ return binl2hex(core_md5(str2binl(s), s.length * chrsz));}
    function b64_md5(s){ return binl2b64(core_md5(str2binl(s), s.length * chrsz));}
    function str_md5(s){ return binl2str(core_md5(str2binl(s), s.length * chrsz));}
    function hex_hmac_md5(key, data) { return binl2hex(core_hmac_md5(key, data)); }
    function b64_hmac_md5(key, data) { return binl2b64(core_hmac_md5(key, data)); }
    function str_hmac_md5(key, data) { return binl2str(core_hmac_md5(key, data)); }
    
    /*
     * Perform a simple self-test to see if the VM is working
     */
    function md5_vm_test()
    {
      return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72";
    }
    
    /*
     * Calculate the MD5 of an array of little-endian words, and a bit length
     */
    function core_md5(x, len)
    {
      /* append padding */
      x[len >> 5] |= 0x80 << ((len) % 32);
      x[(((len + 64) >>> 9) << 4) + 14] = len;
    
      var a =  1732584193;
      var b = -271733879;
      var c = -1732584194;
      var d =  271733878;
    
      for(var i = 0; i < x.length; i += 16)
      {
        var olda = a;
        var oldb = b;
        var oldc = c;
        var oldd = d;
    
        a = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
        d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
        c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
        b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
        a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
        d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
        c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
        b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
        a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
        d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
        c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
        b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
        a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
        d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
        c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
        b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);
    
        a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
        d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
        c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
        b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
        a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
        d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
        c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
        b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
        a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
        d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
        c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
        b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
        a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
        d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
        c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
        b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);
    
        a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
        d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
        c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
        b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
        a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
        d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
        c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
        b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
        a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
        d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
        c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
        b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
        a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
        d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
        c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
        b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);
    
        a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
        d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
        c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
        b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
        a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
        d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
        c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
        b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
        a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
        d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
        c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
        b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
        a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
        d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
        c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
        b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);
    
        a = safe_add(a, olda);
        b = safe_add(b, oldb);
        c = safe_add(c, oldc);
        d = safe_add(d, oldd);
      }
      return Array(a, b, c, d);
    
    }
    
    /*
     * These functions implement the four basic operations the algorithm uses.
     */
    function md5_cmn(q, a, b, x, s, t)
    {
      return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
    }
    function md5_ff(a, b, c, d, x, s, t)
    {
      return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
    }
    function md5_gg(a, b, c, d, x, s, t)
    {
      return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
    }
    function md5_hh(a, b, c, d, x, s, t)
    {
      return md5_cmn(b ^ c ^ d, a, b, x, s, t);
    }
    function md5_ii(a, b, c, d, x, s, t)
    {
      return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
    }
    
    /*
     * Calculate the HMAC-MD5, of a key and some data
     */
    function core_hmac_md5(key, data)
    {
      var bkey = str2binl(key);
      if(bkey.length > 16) bkey = core_md5(bkey, key.length * chrsz);
    
      var ipad = Array(16), opad = Array(16);
      for(var i = 0; i < 16; i++)
      {
        ipad[i] = bkey[i] ^ 0x36363636;
        opad[i] = bkey[i] ^ 0x5C5C5C5C;
      }
    
      var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
      return core_md5(opad.concat(hash), 512 + 128);
    }
    
    /*
     * Add integers, wrapping at 2^32. This uses 16-bit operations internally
     * to work around bugs in some JS interpreters.
     */
    function safe_add(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 bit_rol(num, cnt)
    {
      return (num << cnt) | (num >>> (32 - cnt));
    }
    
    /*
     * Convert a string to an array of little-endian words
     * If chrsz is ASCII, characters >255 have their hi-byte silently ignored.
     */
    function str2binl(str)
    {
      var bin = Array();
      var mask = (1 << chrsz) - 1;
      for(var i = 0; i < str.length * chrsz; i += chrsz)
        bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
      return bin;
    }
    
    /*
     * Convert an array of little-endian words to a string
     */
    function binl2str(bin)
    {
      var str = "";
      var mask = (1 << chrsz) - 1;
      for(var i = 0; i < bin.length * 32; i += chrsz)
        str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
      return str;
    }
    
    /*
     * Convert an array of little-endian words to a hex string.
     */
    function binl2hex(binarray)
    {
      var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
      var str = "";
      for(var i = 0; i < binarray.length * 4; i++)
      {
        str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
               hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
      }
      return str;
    }
    
    /*
     * Convert an array of little-endian words to a base-64 string
     */
    function binl2b64(binarray)
    {
      var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
      var str = "";
      for(var i = 0; i < binarray.length * 4; i += 3)
      {
        var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                    | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                    |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
        for(var j = 0; j < 4; j++)
        {
          if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
          else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
        }
      }
      return str;
    }

4.最后效果

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[Center]: /images/20211008/ac82982a7ebd4069ae6e6da4b7cdb077.png