JS实现的base64加密、md5加密及sha1加密详解

发布时间：2023-09-06 01:20责任编辑：赖小花关键词：base64

1、base64加密

在页面中引入base64.js文件，调用方法为：

<!DOCTYPE HTML>

<html>

<head>

<metacharset="utf-8">

<title>base64加密</title>

<scripttype="text/javascript"src="base64.js"></script>

<scripttype="text/javascript">

var b = new Base64();

var str = b.encode("admin:admin");

alert("base64 encode:" + str);

//解密

str = b.decode(str);

alert("base64 decode:" + str);

</script>

</head>

<body>

</body>

</html>

2、md5加密

在页面中引用md5.js文件，调用方法为

<!DOCTYPE HTML>

<html>

<head>

<meta charset="utf-8">

<title>md5加密</title>

<script type="text/ecmascript" src="md5.js"></script>

<script type="text/javascript">

var hash = hex_md5("123dafd");

alert(hash)

</script>

</head>

<body>

</body>

</html>

3、sha1加密

据说这是最安全的加密

页面中引入sha1.js，调用方法为

<!DOCTYPE HTML>

<html>

<head>

<meta charset="utf-8">

<title>sha1加密</title>

<script type="text/ecmascript" src="sha1.js"></script>

<script type="text/javascript">

var sha = hex_sha1(‘mima123465‘)

alert(sha)

</script>

</head>

<body>

</body>

</html>

一下为js们的源代码

base64.js：

/**

*

* Base64 encode / decode

*

* @author haitao.tu

* @date 2010-04-26

* @email tuhaitao@foxmail.com

*

*/

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;

}

MD5.js：

/*

* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message

* Digest Algorithm, as defined in RFC 1321.

* 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)


	

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