微信签名 sha1 加密
JS 使用 SHA1 加密的示例
下载：sha1.js
前言：
在前端向后端进行接口数据请求时，考虑到数据安全问题，所以会使用一些加密方式，虽然对大佬来说小菜一碟，但对绝大多数人来说还是很有用的，本篇介绍的一种加密方式 是 SHA1 （安全哈希算法）
SHA1 加密示例
sha1.js 文件代码：
function encodeUTF8(s) { var i, r = [], c, x; for (i = 0; i < s.length; i++) if ((c = s.charCodeAt(i)) < 0x80) r.push(c); else if (c < 0x800) r.push(0xC0 + (c >> 6 & 0x1F), 0x80 + (c & 0x3F)); else { if ((x = c ^ 0xD800) >> 10 == 0) //对四字节UTF-16转换为Unicode c = (x << 10) + (s.charCodeAt(++i) ^ 0xDC00) + 0x10000, r.push(0xF0 + (c >> 18 & 0x7), 0x80 + (c >> 12 & 0x3F)); else r.push(0xE0 + (c >> 12 & 0xF)); r.push(0x80 + (c >> 6 & 0x3F), 0x80 + (c & 0x3F)); }; return r; } // 字符串加密成 hex 字符串 function sha1(s) { var data = new Uint8Array(encodeUTF8(s)) var i, j, t; var l = ((data.length + 8) >>> 6 << 4) + 16, s = new Uint8Array(l << 2); s.set(new Uint8Array(data.buffer)), s = new Uint32Array(s.buffer); for (t = new DataView(s.buffer), i = 0; i < l; i++)s[i] = t.getUint32(i << 2); s[data.length >> 2] |= 0x80 << (24 - (data.length & 3) * 8); s[l - 1] = data.length << 3; var w = [], f = [ function () { return m[1] & m[2] | ~m[1] & m[3]; }, function () { return m[1] ^ m[2] ^ m[3]; }, function () { return m[1] & m[2] | m[1] & m[3] | m[2] & m[3]; }, function () { return m[1] ^ m[2] ^ m[3]; } ], rol = function (n, c) { return n << c | n >>> (32 - c); }, k = [1518500249, 1859775393, -1894007588, -899497514], m = [1732584193, -271733879, null, null, -1009589776]; m[2] = ~m[0], m[3] = ~m[1]; for (i = 0; i < s.length; i += 16) { var o = m.slice(0); for (j = 0; j < 80; j++) w[j] = j < 16 ? s[i + j] : rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1), t = rol(m[0], 5) + f[j / 20 | 0]() + m[4] + w[j] + k[j / 20 | 0] | 0, m[1] = rol(m[1], 30), m.pop(), m.unshift(t); for (j = 0; j < 5; j++)m[j] = m[j] + o[j] | 0; }; t = new DataView(new Uint32Array(m).buffer); for (var i = 0; i < 5; i++)m[i] = t.getUint32(i << 2); var hex = Array.prototype.map.call(new Uint8Array(new Uint32Array(m).buffer), function (e) { return (e < 16 ? "0" : "") + e.toString(16); }).join(""); return hex; }
testSha1.html
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>sha1加密</title> <script type="text/ecmascript" src="js/sha1.js"></script> <script type="text/javascript"> var sha = sha1("123456"); alert(sha); </script> </head> <body> </body> </html>
