js的加密没特别多的办法，常见的就三种， MD5加密、Base64加密和sha1加密
一. sha1加密
H5源码：<!DOCTYPE html><html><head><meta charset="utf-8" /><title>shal加密</title><meta name="viewport" content="width=device-width, initial-scale=1"><script src="js/jquery.min.js" type="text/javascript" charset="utf-8"></script><script src="js/shal.js" type="text/javascript" charset="utf-8"></script></head><body><input type="password" name="" id="md5" value="" /><input type="button" name="" id="" value="hex_sha1加密" οnclick="testshal(1)" /><input type="button" name="" id="" value="b64_sha1加密" οnclick="testshal(2)" /><input type="button" name="" id="" value="str_sha1加密" οnclick="testshal(3)" /></body><script type="text/javascript">function testshal(e){var password = $("#md5").val();console.log("没有加密之前的是："+password);if(e == 1){var shalpassword = hex_sha1(password);console.log("hex_sha1方式加密后是："+shalpassword);}else if(e == 2){var shalpassword = b64_sha1(password);console.log("b64_sha1方式加密后是："+shalpassword);}else if(e == 3){var shalpassword = str_sha1(password);console.log("str_sha1方式加密后是："+shalpassword);}}</script></html>
js源码：
var hexcase = 0; /* 十六进制输出格式。0 -小写；1 -大写 */ var b64pad = ""; /* base- 64填充字符。“=”表示严格的RFC合规性 */ var chrsz = 8; /* 每个输入字符的位数。8 - ASCII；16 -统一码 */ function hex_sha1(s) {return binb2hex(core_sha1(str2binb(s), s.length * chrsz)); } function b64_sha1(s) {return binb2b64(core_sha1(str2binb(s), s.length * chrsz)); } function str_sha1(s) {return binb2str(core_sha1(str2binb(s), s.length * chrsz)); } function hex_hmac_sha1(key, data) {return binb2hex(core_hmac_sha1(key, data)); } function b64_hmac_sha1(key, data) {return binb2b64(core_hmac_sha1(key, data)); } function str_hmac_sha1(key, data) {return binb2str(core_hmac_sha1(key, data)); } function sha1_vm_test() {return hex_sha1("abc") == "a9993e364706816aba3e25717850c26c9cd0d89d"; } function core_sha1(x, len) {x[len >> 5] |= 0x80 << (24 - len % 32); x[((len + 64 >> 9) << 4) + 15] = len; var w = Array(80); var a = 1732584193; var b = -271733879; var c = -1732584194; var d = 271733878; var e = -1009589776; for (var i = 0; i < x.length; i += 16) {var olda = a; var oldb = b; var oldc = c; var oldd = d; var olde = e; for (var j = 0; j < 80; j++) {if (j < 16) w[j] = x[i + j]; else w[j] = rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1); var t = safe_add(safe_add(rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j))); e = d; d = c; c = rol(b, 30); b = a; a = t; } a = safe_add(a, olda); b = safe_add(b, oldb); c = safe_add(c, oldc); d = safe_add(d, oldd); e = safe_add(e, olde); } return Array(a, b, c, d, e); } function sha1_ft(t, b, c, d) {if (t < 20) return (b & c) | ((~b) & d); if (t < 40) return b ^ c ^ d; if (t < 60) return (b & c) | (b & d) | (c & d); return b ^ c ^ d; } function sha1_kt(t) {return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 : (t < 60) ? -1894007588 : -899497514; } function core_hmac_sha1(key, data) {var bkey = str2binb(key); if (bkey.length > 16) bkey = core_sha1(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_sha1(ipad.concat(str2binb(data)), 512 + data.length * chrsz); return core_sha1(opad.concat(hash), 512 + 160); } function safe_add(x, y) {var lsw = (x & 0xFFFF) + (y & 0xFFFF); var msw = (x >> 16) + (y >> 16) + (lsw >> 16); return (msw << 16) | (lsw & 0xFFFF); } function rol(num, cnt) {return (num << cnt) | (num >>> (32 - cnt)); } function str2binb(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) << (24 - i % 32); return bin; } function binb2str(bin) {var str = ""; var mask = (1 << chrsz) - 1; for (var i = 0; i < bin.length * 32; i += chrsz) str += String.fromCharCode((bin[i >> 5] >>> (24 - i % 32)) & mask); return str; } function binb2hex(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] >> ((3 - i % 4) * 8 + 4)) & 0xF) + hex_tab.charAt((binarray[i >> 2] >> ((3 - i % 4) * 8)) & 0xF); } return str; } function binb2b64(binarray) {var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; var str = ""; for (var i = 0; i < binarray.length * 4; i += 3) {var triplet = (((binarray[i >> 2] >> 8 * (3 - i % 4)) & 0xFF) << 16) | (((binarray[i + 1 >> 2] >> 8 * (3 - (i + 1) % 4)) & 0xFF) << 8) | ((binarray[i + 2 >> 2] >> 8 * (3 - (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; }
二. MD5加密
H5源码：<!DOCTYPE html><html><head><meta charset="utf-8" /><title>md5加密</title><script src="js/jquery.min.js" type="text/javascript" charset="utf-8"></script><script src="js/md5.js" type="text/javascript" charset="utf-8"></script></head><body><input type="password" name="" id="md5" value="" /><input type="button" name="" id="" value="MD5加密" οnclick="testmd5()" /></body><script type="text/javascript">function testmd5(){var password = $("#md5").val();var md5password = $.md5(password);console.log("没有加密之前的是："+password);console.log("加密以后是："+md5password);}</script></html>
js源码
(function($){var rotateLeft = function(lValue, iShiftBits) {return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));}var addUnsigned = function(lX, lY) {var lX4, lY4, lX8, lY8, lResult;lX8 = (lX & 0x80000000);lY8 = (lY & 0x80000000);lX4 = (lX & 0x40000000);lY4 = (lY & 0x40000000);lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8);if (lX4 | lY4) {if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);else return (lResult ^ 0x40000000 ^ lX8 ^ lY8);} else {return (lResult ^ lX8 ^ lY8);}}var F = function(x, y, z) {return (x & y) | ((~ x) & z);}var G = function(x, y, z) {return (x & z) | (y & (~ z));}var H = function(x, y, z) {return (x ^ y ^ z);}var I = function(x, y, z) {return (y ^ (x | (~ z)));}var FF = function(a, b, c, d, x, s, ac) {a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac));return addUnsigned(rotateLeft(a, s), b);};var GG = function(a, b, c, d, x, s, ac) {a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac));return addUnsigned(rotateLeft(a, s), b);};var HH = function(a, b, c, d, x, s, ac) {a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac));return addUnsigned(rotateLeft(a, s), b);};var II = function(a, b, c, d, x, s, ac) {a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac));return addUnsigned(rotateLeft(a, s), b);};var convertToWordArray = function(string) {var lWordCount;var lMessageLength = string.length;var lNumberOfWordsTempOne = lMessageLength + 8;var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16;var lWordArray = Array(lNumberOfWords - 1);var lBytePosition = 0;var lByteCount = 0;while (lByteCount < lMessageLength) {lWordCount = (lByteCount - (lByteCount % 4)) / 4;lBytePosition = (lByteCount % 4) * 8;lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));lByteCount++;}lWordCount = (lByteCount - (lByteCount % 4)) / 4;lBytePosition = (lByteCount % 4) * 8;lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);lWordArray[lNumberOfWords - 2] = lMessageLength << 3;lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;return lWordArray;};var wordToHex = function(lValue) {var WordToHexValue = "", WordToHexValueTemp = "", lByte, lCount;for (lCount = 0; lCount <= 3; lCount++) {lByte = (lValue >>> (lCount * 8)) & 255;WordToHexValueTemp = "0" + lByte.toString(16);WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);}return WordToHexValue;};var uTF8Encode = function(string) {string = string.replace(/\x0d\x0a/g, "\x0a");var output = "";for (var n = 0; n < string.length; n++) {var c = string.charCodeAt(n);if (c < 128) {output += String.fromCharCode(c);} else if ((c > 127) && (c < 2048)) {output += String.fromCharCode((c >> 6) | 192);output += String.fromCharCode((c & 63) | 128);} else {output += String.fromCharCode((c >> 12) | 224);output += String.fromCharCode(((c >> 6) & 63) | 128);output += String.fromCharCode((c & 63) | 128);}}return output;};$.extend({md5: function(string) {var x = Array();var k, AA, BB, CC, DD, a, b, c, d;var S11=7, S12=12, S13=17, S14=22;var S21=5, S22=9 , S23=14, S24=20;var S31=4, S32=11, S33=16, S34=23;var S41=6, S42=10, S43=15, S44=21;string = uTF8Encode(string);x = convertToWordArray(string);a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;for (k = 0; k < x.length; k += 16) {AA = a; BB = b; CC = c; DD = d;a = FF(a, b, c, d, x[k+0], S11, 0xD76AA478);d = FF(d, a, b, c, x[k+1], S12, 0xE8C7B756);c = FF(c, d, a, b, x[k+2], S13, 0x242070DB);b = FF(b, c, d, a, x[k+3], S14, 0xC1BDCEEE);a = FF(a, b, c, d, x[k+4], S11, 0xF57C0FAF);d = FF(d, a, b, c, x[k+5], S12, 0x4787C62A);c = FF(c, d, a, b, x[k+6], S13, 0xA8304613);b = FF(b, c, d, a, x[k+7], S14, 0xFD469501);a = FF(a, b, c, d, x[k+8], S11, 0x698098D8);d = FF(d, a, b, c, x[k+9], S12, 0x8B44F7AF);c = FF(c, d, a, b, x[k+10], S13, 0xFFFF5BB1);b = FF(b, c, d, a, x[k+11], S14, 0x895CD7BE);a = FF(a, b, c, d, x[k+12], S11, 0x6B901122);d = FF(d, a, b, c, x[k+13], S12, 0xFD987193);c = FF(c, d, a, b, x[k+14], S13, 0xA679438E);b = FF(b, c, d, a, x[k+15], S14, 0x49B40821);a = GG(a, b, c, d, x[k+1], S21, 0xF61E2562);d = GG(d, a, b, c, x[k+6], S22, 0xC040B340);c = GG(c, d, a, b, x[k+11], S23, 0x265E5A51);b = GG(b, c, d, a, x[k+0], S24, 0xE9B6C7AA);a = GG(a, b, c, d, x[k+5], S21, 0xD62F105D);d = GG(d, a, b, c, x[k+10], S22, 0x2441453);c = GG(c, d, a, b, x[k+15], S23, 0xD8A1E681);b = GG(b, c, d, a, x[k+4], S24, 0xE7D3FBC8);a = GG(a, b, c, d, x[k+9], S21, 0x21E1CDE6);d = GG(d, a, b, c, x[k+14], S22, 0xC33707D6);c = GG(c, d, a, b, x[k+3], S23, 0xF4D50D87);b = GG(b, c, d, a, x[k+8], S24, 0x455A14ED);a = GG(a, b, c, d, x[k+13], S21, 0xA9E3E905);d = GG(d, a, b, c, x[k+2], S22, 0xFCEFA3F8);c = GG(c, d, a, b, x[k+7], S23, 0x676F02D9);b = GG(b, c, d, a, x[k+12], S24, 0x8D2A4C8A);a = HH(a, b, c, d, x[k+5], S31, 0xFFFA3942);d = HH(d, a, b, c, x[k+8], S32, 0x8771F681);c = HH(c, d, a, b, x[k+11], S33, 0x6D9D6122);b = HH(b, c, d, a, x[k+14], S34, 0xFDE5380C);a = HH(a, b, c, d, x[k+1], S31, 0xA4BEEA44);d = HH(d, a, b, c, x[k+4], S32, 0x4BDECFA9);c = HH(c, d, a, b, x[k+7], S33, 0xF6BB4B60);b = HH(b, c, d, a, x[k+10], S34, 0xBEBFBC70);a = HH(a, b, c, d, x[k+13], S31, 0x289B7EC6);d = HH(d, a, b, c, x[k+0], S32, 0xEAA127FA);c = HH(c, d, a, b, x[k+3], S33, 0xD4EF3085);b = HH(b, c, d, a, x[k+6], S34, 0x4881D05);a = HH(a, b, c, d, x[k+9], S31, 0xD9D4D039);d = HH(d, a, b, c, x[k+12], S32, 0xE6DB99E5);c = HH(c, d, a, b, x[k+15], S33, 0x1FA27CF8);b = HH(b, c, d, a, x[k+2], S34, 0xC4AC5665);a = II(a, b, c, d, x[k+0], S41, 0xF4292244);d = II(d, a, b, c, x[k+7], S42, 0x432AFF97);c = II(c, d, a, b, x[k+14], S43, 0xAB9423A7);b = II(b, c, d, a, x[k+5], S44, 0xFC93A039);a = II(a, b, c, d, x[k+12], S41, 0x655B59C3);d = II(d, a, b, c, x[k+3], S42, 0x8F0CCC92);c = II(c, d, a, b, x[k+10], S43, 0xFFEFF47D);b = II(b, c, d, a, x[k+1], S44, 0x85845DD1);a = II(a, b, c, d, x[k+8], S41, 0x6FA87E4F);d = II(d, a, b, c, x[k+15], S42, 0xFE2CE6E0);c = II(c, d, a, b, x[k+6], S43, 0xA3014314);b = II(b, c, d, a, x[k+13], S44, 0x4E0811A1);a = II(a, b, c, d, x[k+4], S41, 0xF7537E82);d = II(d, a, b, c, x[k+11], S42, 0xBD3AF235);c = II(c, d, a, b, x[k+2], S43, 0x2AD7D2BB);b = II(b, c, d, a, x[k+9], S44, 0xEB86D391);a = addUnsigned(a, AA);b = addUnsigned(b, BB);c = addUnsigned(c, CC);d = addUnsigned(d, DD);}var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);return tempValue.toLowerCase();}});})(jQuery);
三. Base64加密
H5源码<!DOCTYPE html><html><head><meta charset="utf-8" /><title>base64加密</title><meta name="viewport" content="width=device-width, initial-scale=1"><script src="js/jquery.min.js" type="text/javascript" charset="utf-8"></script></head><body><input type="password" name="" id="basepass" value="" /><input type="button" name="" id="" value="base加密" οnclick="basefunc(1)"/><input type="button" name="" id="" value="base解密" οnclick="basefunc(2)"/></body><script src="js/funcbase64.js" type="text/javascript" charset="utf-8"></script><script type="text/javascript">function basefunc(e){var password = $("#basepass").val();var base = new Base64();var encypass = base.encode(password);var decryptpass = base.decode(encypass);if(e == 1){console.log("加密之前的密码是："+password);console.log("加密之后的结果是："+encypass);}else if(e == 2){console.log("解密之前的结果是："+encypass);console.log("解密之后的结果是："+decryptpass);}}</script></html>
js源码
function Base64() {// private property _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="; // public method for encoding this.encode = function (input) {var output = ""; var chr1, chr2, chr3, enc1, enc2, enc3, enc4; var i = 0; input = _utf8_encode(input); while (i < input.length) {chr1 = input.charCodeAt(i++); chr2 = input.charCodeAt(i++); chr3 = input.charCodeAt(i++); enc1 = chr1 >> 2; enc2 = ((chr1 & 3) << 4) | (chr2 >> 4); enc3 = ((chr2 & 15) << 2) | (chr3 >> 6); enc4 = chr3 & 63; if (isNaN(chr2)) {enc3 = enc4 = 64; } else if (isNaN(chr3)) {enc4 = 64; } output = output + _keyStr.charAt(enc1) + _keyStr.charAt(enc2) + _keyStr.charAt(enc3) + _keyStr.charAt(enc4); } return output; } // public method for decoding this.decode = function (input) {var output = ""; var chr1, chr2, chr3; var enc1, enc2, enc3, enc4; var i = 0; input = input.replace(/[^A-Za-z0-9\+\/\=]/g, ""); while (i < input.length) {enc1 = _keyStr.indexOf(input.charAt(i++)); enc2 = _keyStr.indexOf(input.charAt(i++)); enc3 = _keyStr.indexOf(input.charAt(i++)); enc4 = _keyStr.indexOf(input.charAt(i++)); chr1 = (enc1 << 2) | (enc2 >> 4); chr2 = ((enc2 & 15) << 4) | (enc3 >> 2); chr3 = ((enc3 & 3) << 6) | enc4; output = output + String.fromCharCode(chr1); if (enc3 != 64) {output = output + String.fromCharCode(chr2); } if (enc4 != 64) {output = output + String.fromCharCode(chr3); } } output = _utf8_decode(output); return output; } // private method for UTF-8 encoding _utf8_encode = function (string) {string = string.replace(/\r\n/g,"\n"); var utftext = ""; for (var n = 0; n < string.length; n++) {var c = string.charCodeAt(n); if (c < 128) {utftext += String.fromCharCode(c); } else if((c > 127) && (c < 2048)) {utftext += String.fromCharCode((c >> 6) | 192); utftext += String.fromCharCode((c & 63) | 128); } else {utftext += String.fromCharCode((c >> 12) | 224); utftext += String.fromCharCode(((c >> 6) & 63) | 128); utftext += String.fromCharCode((c & 63) | 128); } } return utftext; } // private method for UTF-8 decoding _utf8_decode = function (utftext) {var string = ""; var i = 0; var c = c1 = c2 = 0; while ( i < utftext.length ) {c = utftext.charCodeAt(i); if (c < 128) {string += String.fromCharCode(c); i++; } else if((c > 191) && (c < 224)) {c2 = utftext.charCodeAt(i+1); string += String.fromCharCode(((c & 31) << 6) | (c2 & 63)); i += 2; } else {c2 = utftext.charCodeAt(i+1); c3 = utftext.charCodeAt(i+2); string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63)); i += 3; } } return string; } }
