如何编写functionToGenerateMD5hash此代码?我已经拥有了fileVideo,我需要通过单击按钮将相应的md5哈希发送到服务器。
functionToGenerateMD5hash
fileVideo
$("#someButton").click(function() { var fr = new FileReader(); fr.onload = function(e) { string md5 = functionToGenerateMD5hash(e.target.result); // send md5 here }; fr.readAsArrayBuffer(fileVideo);
您可以使用crypto-js。
我也建议使用SHA256,而不是MD5。
要通过NPM安装crypto-js:
npm install crypto-js
或者,您可以使用CDN并引用JS文件。
然后,要显示MD5和SHA256哈希,可以执行以下操作:
<script type="text/javascript"> var md5Hash = CryptoJS.MD5("Test"); var sha256Hash = CryptoJS.SHA256("Test1"); console.log(md5Hash.toString()); console.log(sha256Hash.toString()); </script>
此处的工作示例JSFiddle
还有其他一些JS函数会生成MD5哈希,如下所述。
MD5
http://www.myersdaily.org/joseph/javascript/md5-text.html
http://pajhome.org.uk/crypt/md5/md5.html
function md5cycle(x, k) { var a = x[0], b = x[1], c = x[2], d = x[3]; a = ff(a, b, c, d, k[0], 7, -680876936); d = ff(d, a, b, c, k[1], 12, -389564586); c = ff(c, d, a, b, k[2], 17, 606105819); b = ff(b, c, d, a, k[3], 22, -1044525330); a = ff(a, b, c, d, k[4], 7, -176418897); d = ff(d, a, b, c, k[5], 12, 1200080426); c = ff(c, d, a, b, k[6], 17, -1473231341); b = ff(b, c, d, a, k[7], 22, -45705983); a = ff(a, b, c, d, k[8], 7, 1770035416); d = ff(d, a, b, c, k[9], 12, -1958414417); c = ff(c, d, a, b, k[10], 17, -42063); b = ff(b, c, d, a, k[11], 22, -1990404162); a = ff(a, b, c, d, k[12], 7, 1804603682); d = ff(d, a, b, c, k[13], 12, -40341101); c = ff(c, d, a, b, k[14], 17, -1502002290); b = ff(b, c, d, a, k[15], 22, 1236535329); a = gg(a, b, c, d, k[1], 5, -165796510); d = gg(d, a, b, c, k[6], 9, -1069501632); c = gg(c, d, a, b, k[11], 14, 643717713); b = gg(b, c, d, a, k[0], 20, -373897302); a = gg(a, b, c, d, k[5], 5, -701558691); d = gg(d, a, b, c, k[10], 9, 38016083); c = gg(c, d, a, b, k[15], 14, -660478335); b = gg(b, c, d, a, k[4], 20, -405537848); a = gg(a, b, c, d, k[9], 5, 568446438); d = gg(d, a, b, c, k[14], 9, -1019803690); c = gg(c, d, a, b, k[3], 14, -187363961); b = gg(b, c, d, a, k[8], 20, 1163531501); a = gg(a, b, c, d, k[13], 5, -1444681467); d = gg(d, a, b, c, k[2], 9, -51403784); c = gg(c, d, a, b, k[7], 14, 1735328473); b = gg(b, c, d, a, k[12], 20, -1926607734); a = hh(a, b, c, d, k[5], 4, -378558); d = hh(d, a, b, c, k[8], 11, -2022574463); c = hh(c, d, a, b, k[11], 16, 1839030562); b = hh(b, c, d, a, k[14], 23, -35309556); a = hh(a, b, c, d, k[1], 4, -1530992060); d = hh(d, a, b, c, k[4], 11, 1272893353); c = hh(c, d, a, b, k[7], 16, -155497632); b = hh(b, c, d, a, k[10], 23, -1094730640); a = hh(a, b, c, d, k[13], 4, 681279174); d = hh(d, a, b, c, k[0], 11, -358537222); c = hh(c, d, a, b, k[3], 16, -722521979); b = hh(b, c, d, a, k[6], 23, 76029189); a = hh(a, b, c, d, k[9], 4, -640364487); d = hh(d, a, b, c, k[12], 11, -421815835); c = hh(c, d, a, b, k[15], 16, 530742520); b = hh(b, c, d, a, k[2], 23, -995338651); a = ii(a, b, c, d, k[0], 6, -198630844); d = ii(d, a, b, c, k[7], 10, 1126891415); c = ii(c, d, a, b, k[14], 15, -1416354905); b = ii(b, c, d, a, k[5], 21, -57434055); a = ii(a, b, c, d, k[12], 6, 1700485571); d = ii(d, a, b, c, k[3], 10, -1894986606); c = ii(c, d, a, b, k[10], 15, -1051523); b = ii(b, c, d, a, k[1], 21, -2054922799); a = ii(a, b, c, d, k[8], 6, 1873313359); d = ii(d, a, b, c, k[15], 10, -30611744); c = ii(c, d, a, b, k[6], 15, -1560198380); b = ii(b, c, d, a, k[13], 21, 1309151649); a = ii(a, b, c, d, k[4], 6, -145523070); d = ii(d, a, b, c, k[11], 10, -1120210379); c = ii(c, d, a, b, k[2], 15, 718787259); b = ii(b, c, d, a, k[9], 21, -343485551); x[0] = add32(a, x[0]); x[1] = add32(b, x[1]); x[2] = add32(c, x[2]); x[3] = add32(d, x[3]); } function cmn(q, a, b, x, s, t) { a = add32(add32(a, q), add32(x, t)); return add32((a << s) | (a >>> (32 - s)), b); } function ff(a, b, c, d, x, s, t) { return cmn((b & c) | ((~b) & d), a, b, x, s, t); } function gg(a, b, c, d, x, s, t) { return cmn((b & d) | (c & (~d)), a, b, x, s, t); } function hh(a, b, c, d, x, s, t) { return cmn(b ^ c ^ d, a, b, x, s, t); } function ii(a, b, c, d, x, s, t) { return cmn(c ^ (b | (~d)), a, b, x, s, t); } function md51(s) { txt = ''; var n = s.length, state = [1732584193, -271733879, -1732584194, 271733878], i; for (i=64; i<=s.length; i+=64) { md5cycle(state, md5blk(s.substring(i-64, i))); } s = s.substring(i-64); var tail = [0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0]; for (i=0; i<s.length; i++) tail[i>>2] |= s.charCodeAt(i) << ((i%4) << 3); tail[i>>2] |= 0x80 << ((i%4) << 3); if (i > 55) { md5cycle(state, tail); for (i=0; i<16; i++) tail[i] = 0; } tail[14] = n*8; md5cycle(state, tail); return state; } /* there needs to be support for Unicode here, * unless we pretend that we can redefine the MD-5 * algorithm for multi-byte characters (perhaps * by adding every four 16-bit characters and * shortening the sum to 32 bits). Otherwise * I suggest performing MD-5 as if every character * was two bytes--e.g., 0040 0025 = @%--but then * how will an ordinary MD-5 sum be matched? * There is no way to standardize text to something * like UTF-8 before transformation; speed cost is * utterly prohibitive. The JavaScript standard * itself needs to look at this: it should start * providing access to strings as preformed UTF-8 * 8-bit unsigned value arrays. */ function md5blk(s) { /* I figured global was faster. */ var md5blks = [], i; /* Andy King said do it this way. */ for (i=0; i<64; i+=4) { md5blks[i>>2] = s.charCodeAt(i) + (s.charCodeAt(i+1) << 8) + (s.charCodeAt(i+2) << 16) + (s.charCodeAt(i+3) << 24); } return md5blks; } var hex_chr = '0123456789abcdef'.split(''); function rhex(n) { var s='', j=0; for(; j<4; j++) s += hex_chr[(n >> (j * 8 + 4)) & 0x0F] + hex_chr[(n >> (j * 8)) & 0x0F]; return s; } function hex(x) { for (var i=0; i<x.length; i++) x[i] = rhex(x[i]); return x.join(''); } function md5(s) { return hex(md51(s)); } /* this function is much faster, so if possible we use it. Some IEs are the only ones I know of that need the idiotic second function, generated by an if clause. */ function add32(a, b) { return (a + b) & 0xFFFFFFFF; } if (md5('hello') != '5d41402abc4b2a76b9719d911017c592') { function add32(x, y) { var lsw = (x & 0xFFFF) + (y & 0xFFFF), msw = (x >> 16) + (y >> 16) + (lsw >> 16); return (msw << 16) | (lsw & 0xFFFF); } }
然后只需使用MD5功能,如下所示:
alert(md5("Test string"));
另一个正在工作的JS小提琴在这里