这次给大家带来怎样使用JS实现3des+base64加密解密算法，使用JS实现3des+base64加密解密算法的注意事项有哪些，下面就是实战案例，一起来看一下。
1. index.html：
<title> BASE64编码</title>
<meta>
<script></script>
<script></script>
<script>
var str = "网址：http://www.jb51.net";
document.write("原始字符串:"+str);
var base64 = BASE64.encoder(str);//返回编码后的字符
document.write("BASE64后:"+base64);
//alert(base64);
var unicode= BASE64.decoder(base64);//返回会解码后的字符串。
//alert(unicode);
document.write("还原:"+unicode);
//var str= "你好123hello";
var key = "qXSdHWfbSZaaLeHBRhLgxBiG";
//alert(decrypt_3des);
var des3en = DES3.encrypt(key,str);
document.write("des3加密:"+des3en);
document.write("des3解密:"+DES3.decrypt(key,des3en));
</script>
2. DES3.js文件：
/**
* DES 加密算法
*
* 该函数接受一个 8 字节字符串作为普通 DES 算法的密钥（也就是 64 位，但是算法只使用 56 位），或者接受一个 24 字节字符串作为 3DES
* 算法的密钥；第二个参数是要加密或解密的信息字符串；第三个布尔值参数用来说明信息是加密还是解密；接下来的可选参数 mode 如果是 0 表示 ECB
* 模式，1 表示 CBC 模式，默认是 ECB 模式；最后一个可选项是一个 8 字节的输入向量字符串（在 ECB 模式下不使用）。返回的密文是字符串。
*
* 参数： <br>
* key: 8字节字符串作为普通 DES 算法的密钥,或 24 字节字符串作为 3DES <br>
* message： 加密或解密的信息字符串<br>
* encrypt: 布尔值参数用来说明信息是加密还是解密<br>
* mode: 1:CBC模式，0:ECB模式(默认)<br>
* iv:<br>
* padding: 可选项, 8字节的输入向量字符串（在 ECB 模式下不使用）
*/
//this takes the key, the message, and whether to encrypt or decrypt
function des (key, message, encrypt, mode, iv, padding) {
if(encrypt) //如果是加密的话，首先转换编码
message = unescape(encodeURIComponent(message));
//declaring this locally speeds things up a bit
var spfunction1 = new Array (0x1010400,0,0x10000,0x1010404,0x1010004,0x10404,0x4,0x10000,0x400,0x1010400,0x1010404,0x400,0x1000404,0x1010004,0x1000000,0x4,0x404,0x1000400,0x1000400,0x10400,0x10400,0x1010000,0x1010000,0x1000404,0x10004,0x1000004,0x1000004,0x10004,0,0x404,0x10404,0x1000000,0x10000,0x1010404,0x4,0x1010000,0x1010400,0x1000000,0x1000000,0x400,0x1010004,0x10000,0x10400,0x1000004,0x400,0x4,0x1000404,0x10404,0x1010404,0x10004,0x1010000,0x1000404,0x1000004,0x404,0x10404,0x1010400,0x404,0x1000400,0x1000400,0,0x10004,0x10400,0,0x1010004);
var spfunction2 = new Array (-0x7fef7fe0,-0x7fff8000,0x8000,0x108020,0x100000,0x20,-0x7fefffe0,-0x7fff7fe0,-0x7fffffe0,-0x7fef7fe0,-0x7fef8000,-0x80000000,-0x7fff8000,0x100000,0x20,-0x7fefffe0,0x108000,0x100020,-0x7fff7fe0,0,-0x80000000,0x8000,0x108020,-0x7ff00000,0x100020,-0x7fffffe0,0,0x108000,0x8020,-0x7fef8000,-0x7ff00000,0x8020,0,0x108020,-0x7fefffe0,0x100000,-0x7fff7fe0,-0x7ff00000,-0x7fef8000,0x8000,-0x7ff00000,-0x7fff8000,0x20,-0x7fef7fe0,0x108020,0x20,0x8000,-0x80000000,0x8020,-0x7fef8000,0x100000,-0x7fffffe0,0x100020,-0x7fff7fe0,-0x7fffffe0,0x100020,0x108000,0,-0x7fff8000,0x8020,-0x80000000,-0x7fefffe0,-0x7fef7fe0,0x108000);
var spfunction3 = new Array (0x208,0x8020200,0,0x8020008,0x8000200,0,0x20208,0x8000200,0x20008,0x8000008,0x8000008,0x20000,0x8020208,0x20008,0x8020000,0x208,0x8000000,0x8,0x8020200,0x200,0x20200,0x8020000,0x8020008,0x20208,0x8000208,0x20200,0x20000,0x8000208,0x8,0x8020208,0x200,0x8000000,0x8020200,0x8000000,0x20008,0x208,0x20000,0x8020200,0x8000200,0,0x200,0x20008,0x8020208,0x8000200,0x8000008,0x200,0,0x8020008,0x8000208,0x20000,0x8000000,0x8020208,0x8,0x20208,0x20200,0x8000008,0x8020000,0x8000208,0x208,0x8020000,0x20208,0x8,0x8020008,0x20200);
var spfunction4 = new Array (0x802001,0x2081,0x2081,0x80,0x802080,0x800081,0x800001,0x2001,0,0x802000,0x802000,0x802081,0x81,0,0x800080,0x800001,0x1,0x2000,0x800000,0x802001,0x80,0x800000,0x2001,0x2080,0x800081,0x1,0x2080,0x800080,0x2000,0x802080,0x802081,0x81,0x800080,0x800001,0x802000,0x802081,0x81,0,0,0x802000,0x2080,0x800080,0x800081,0x1,0x802001,0x2081,0x2081,0x80,0x802081,0x81,0x1,0x2000,0x800001,0x2001,0x802080,0x800081,0x2001,0x2080,0x800000,0x802001,0x80,0x800000,0x2000,0x802080);
var spfunction5 = new Array (0x100,0x2080100,0x2080000,0x42000100,0x80000,0x100,0x40000000,0x2080000,0x40080100,0x80000,0x2000100,0x40080100,0x42000100,0x42080000,0x80100,0x40000000,0x2000000,0x40080000,0x40080000,0,0x40000100,0x42080100,0x42080100,0x2000100,0x42080000,0x40000100,0,0x42000000,0x2080100,0x2000000,0x42000000,0x80100,0x80000,0x42000100,0x100,0x2000000,0x40000000,0x2080000,0x42000100,0x40080100,0x2000100,0x40000000,0x42080000,0x2080100,0x40080100,0x100,0x2000000,0x42080000,0x42080100,0x80100,0x42000000,0x42080100,0x2080000,0,0x40080000,0x42000000,0x80100,0x2000100,0x40000100,0x80000,0,0x40080000,0x2080100,0x40000100);
var spfunction6 = new Array (0x20000010,0x20400000,0x4000,0x20404010,0x20400000,0x10,0x20404010,0x400000,0x20004000,0x404010,0x400000,0x20000010,0x400010,0x20004000,0x20000000,0x4010,0,0x400010,0x20004010,0x4000,0x404000,0x20004010,0x10,0x20400010,0x20400010,0,0x404010,0x20404000,0x4010,0x404000,0x20404000,0x20000000,0x20004000,0x10,0x20400010,0x404000,0x20404010,0x400000,0x4010,0x20000010,0x400000,0x20004000,0x20000000,0x4010,0x20000010,0x20404010,0x404000,0x20400000,0x404010,0x20404000,0,0x20400010,0x10,0x4000,0x20400000,0x404010,0x4000,0x400010,0x20004010,0,0x20404000,0x20000000,0x400010,0x20004010);
var spfunction7 = new Array (0x200000,0x4200002,0x4000802,0,0x800,0x4000802,0x200802,0x4200800,0x4200802,0x200000,0,0x4000002,0x2,0x4000000,0x4200002,0x802,0x4000800,0x200802,0x200002,0x4000800,0x4000002,0x4200000,0x4200800,0x200002,0x4200000,0x800,0x802,0x4200802,0x200800,0x2,0x4000000,0x200800,0x4000000,0x200800,0x200000,0x4000802,0x4000802,0x4200002,0x4200002,0x2,0x200002,0x4000000,0x4000800,0x200000,0x4200800,0x802,0x200802,0x4200800,0x802,0x4000002,0x4200802,0x4200000,0x200800,0,0x2,0x4200802,0,0x200802,0x4200000,0x800,0x4000002,0x4000800,0x800,0x200002);
var spfunction8 = new Array (0x10001040,0x1000,0x40000,0x10041040,0x10000000,0x10001040,0x40,0x10000000,0x40040,0x10040000,0x10041040,0x41000,0x10041000,0x41040,0x1000,0x40,0x10040000,0x10000040,0x10001000,0x1040,0x41000,0x40040,0x10040040,0x10041000,0x1040,0,0,0x10040040,0x10000040,0x10001000,0x41040,0x40000,0x41040,0x40000,0x10041000,0x1000,0x40,0x10040040,0x1000,0x41040,0x10001000,0x40,0x10000040,0x10040000,0x10040040,0x10000000,0x40000,0x10001040,0,0x10041040,0x40040,0x10000040,0x10040000,0x10001000,0x10001040,0,0x10041040,0x41000,0x41000,0x1040,0x1040,0x40040,0x10000000,0x10041000);
//create the 16 or 48 subkeys we will need
var keys = des_createKeys (key);
var m=0, i, j, temp, temp2, right1, right2, left, right, looping;
var cbcleft, cbcleft2, cbcright, cbcright2
var endloop, loopinc;
var len = message.length;
var chunk = 0;
//set up the loops for single and triple des
var iterations = keys.length == 32 ? 3 : 9; //single or triple des
if (iterations == 3) {looping = encrypt ? new Array (0, 32, 2) : new Array (30, -2, -2);}
else {looping = encrypt ? new Array (0, 32, 2, 62, 30, -2, 64, 96, 2) : new Array (94, 62, -2, 32, 64, 2, 30, -2, -2);}
//pad the message depending on the padding parameter
if (padding == 2) message += " "; //pad the message with spaces
else if (padding == 1) {
if(encrypt) {
temp = 8-(len%8);
message += String.fromCharCode(temp,temp,temp,temp,temp,temp,temp,temp);
if (temp===8) len+=8;
}
} //PKCS7 padding
else if (!padding) message += "\0\0\0\0\0\0\0\0"; //pad the message out with null bytes
//store the result here
var result = "";
var tempresult = "";
if (mode == 1) { //CBC mode
cbcleft = (iv.charCodeAt(m++) >> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp >> 16) ^ right) & 0x0000ffff; right ^= temp; left ^= (temp >> 2) ^ left) & 0x33333333; left ^= temp; right ^= (temp >> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp >> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp >> 31));
right = ((right >> 31));
//do this either 1 or 3 times for each chunk of the message
for (j=0; j<iterations>>> 4) | (right >> 24) & 0x3f] | spfunction4[(right1 >>> 16) & 0x3f]
| spfunction6[(right1 >>> 8) & 0x3f] | spfunction8[right1 & 0x3f]
| spfunction1[(right2 >>> 24) & 0x3f] | spfunction3[(right2 >>> 16) & 0x3f]
| spfunction5[(right2 >>> 8) & 0x3f] | spfunction7[right2 & 0x3f]);
}
temp = left; left = right; right = temp; //unreverse left and right
} //for either 1 or 3 iterations
//move then each one bit to the right
left = ((left >>> 1) | (left >> 1) | (right >> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp >> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp >> 2) ^ left) & 0x33333333; left ^= temp; right ^= (temp >> 16) ^ right) & 0x0000ffff; right ^= temp; left ^= (temp >> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp >>24), ((left>>>16) & 0xff), ((left>>>8) & 0xff), (left & 0xff), (right>>>24), ((right>>>16) & 0xff), ((right>>>8) & 0xff), (right & 0xff));
chunk += 8;
if (chunk == 512) {result += tempresult; tempresult = ""; chunk = 0;}
} //for every 8 characters, or 64 bits in the message
//return the result as an array
result += tempresult;
result = result.replace(/\0*$/g, "");
if(!encrypt ) { //如果是解密的话，解密结束后对PKCS7 padding进行解码，并转换成utf-8编码
if(padding === 1) { //PKCS7 padding解码
var len = result.length, paddingChars = 0;
len && (paddingChars = result.charCodeAt(len-1));
(paddingChars 8 ? 3 : 1; //changed by Paul 16/6/2007 to use Triple DES for 9+ byte keys
//stores the return keys
var keys = new Array (32 * iterations);
//now define the left shifts which need to be done
var shifts = new Array (0, 0, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 0);
//other variables
var lefttemp, righttemp, m=0, n=0, temp;
for (var j=0; j<iterations>>> 4) ^ right) & 0x0f0f0f0f; right ^= temp; left ^= (temp >> -16) ^ left) & 0x0000ffff; left ^= temp; right ^= (temp >> 2) ^ right) & 0x33333333; right ^= temp; left ^= (temp >> -16) ^ left) & 0x0000ffff; left ^= temp; right ^= (temp >> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp >> 8) ^ left) & 0x00ff00ff; left ^= temp; right ^= (temp >> 1) ^ right) & 0x55555555; right ^= temp; left ^= (temp >> 20) & 0x000000f0);
//left needs to be put upside down
left = (right >> 8) & 0xff00) | ((right >>> 24) & 0xf0);
right = temp;
//now go through and perform these shifts on the left and right keys
for (var i=0; i >> 26); right = (right >> 26);}
else {left = (left >> 27); right = (right >> 27);}
left &= -0xf; right &= -0xf;
//now apply PC-2, in such a way that E is easier when encrypting or decrypting
//this conversion will look like PC-2 except only the last 6 bits of each byte are used
//rather than 48 consecutive bits and the order of lines will be according to
//how the S selection functions will be applied: S2, S4, S6, S8, S1, S3, S5, S7
lefttemp = pc2bytes0[left >>> 28] | pc2bytes1[(left >>> 24) & 0xf]
| pc2bytes2[(left >>> 20) & 0xf] | pc2bytes3[(left >>> 16) & 0xf]
| pc2bytes4[(left >>> 12) & 0xf] | pc2bytes5[(left >>> 8) & 0xf]
| pc2bytes6[(left >>> 4) & 0xf];
righttemp = pc2bytes7[right >>> 28] | pc2bytes8[(right >>> 24) & 0xf]
| pc2bytes9[(right >>> 20) & 0xf] | pc2bytes10[(right >>> 16) & 0xf]
| pc2bytes11[(right >>> 12) & 0xf] | pc2bytes12[(right >>> 8) & 0xf]
| pc2bytes13[(right >>> 4) & 0xf];
temp = ((righttemp >>> 16) ^ lefttemp) & 0x0000ffff;
keys[n++] = lefttemp ^ temp; keys[n++] = righttemp ^ (temp <p style="text-align: left;">3. Base64.js文件：</p>
<pre class="brush:php;toolbar:false">/**
*create by 2014年7月9日 http://javascript.css-js.com/
*BASE64 Encode and Decode By UTF-8 unicode
*可以和java的BASE64编码和解码互相转化
*/
var BASE64_MAPPING = [
'A','B','C','D','E','F','G','H',
'I','J','K','L','M','N','O','P',
'Q','R','S','T','U','V','W','X',
'Y','Z','a','b','c','d','e','f',
'g','h','i','j','k','l','m','n',
'o','p','q','r','s','t','u','v',
'w','x','y','z','0','1','2','3',
'4','5','6','7','8','9','+','/'
];
/**
*ascii convert to binary
*/
var _toBinary = function(ascii){
var binary = new Array();
while(ascii > 0){
var b = ascii%2;
ascii = Math.floor(ascii/2);
binary.push(b);
}
/*
var len = binary.length;
if(6-len > 0){
for(var i = 6-len ; i > 0 ; --i){
binary.push(0);
}
}*/
binary.reverse();
return binary;
};
/**
*binary convert to decimal
*/
var _toDecimal = function(binary){
var dec = 0;
var p = 0;
for(var i = binary.length-1 ; i >= 0 ; --i){
var b = binary[i];
if(b == 1){
dec += Math.pow(2 , p);
}
++p;
}
return dec;
};
/**
*unicode convert to utf-8
*/
var _toUTF8Binary = function(c , binaryArray){
var mustLen = (8-(c+1)) + ((c-1)*6);
var fatLen = binaryArray.length;
var diff = mustLen - fatLen;
while(--diff >= 0){
binaryArray.unshift(0);
}
var binary = [];
var _c = c;
while(--_c >= 0){
binary.push(1);
}
binary.push(0);
var i = 0 , len = 8 - (c+1);
for(; i = 0){
binary.push(binaryArray[i++]);
}
}
return binary;
};
var BASE64 = {
/**
*BASE64 Encode
*/
encoder:function(str){
var base64_Index = [];
var binaryArray = [];
for(var i = 0 , len = str.length ; i = 0){
_tmpBinary.unshift(0);
}
binaryArray = binaryArray.concat(_tmpBinary);
}else if(unicode >= 0x80 && unicode = 0x800 && unicode = 0x10000 && unicode = 0x200000 && unicode = 4000000 && unicode 0){
// len += extra_Zero_Count+1;
//}
var _tmpExtra_Zero_Count = extra_Zero_Count;
while(--_tmpExtra_Zero_Count >= 0){
binaryArray.push(0);
}
base64_Index.push(_toDecimal(binaryArray.slice(i , i+6)));
}
var base64 = '';
for(var i = 0 , len = base64_Index.length ; i 0){
for(var k = 6-_tmpLen ; k > 0 ; --k){
_tmp.unshift(0);
}
}
binaryArray = binaryArray.concat(_tmp);
break;
}
}
}
if(extra_Zero_Count > 0){
binaryArray = binaryArray.slice(0 , binaryArray.length - extra_Zero_Count);
}
var unicode = [];
var unicodeBinary = [];
for(var i = 0 , len = binaryArray.length ; i 1){
unicodeBinary = unicodeBinary.concat(binaryArray.slice(i+2 , i+8));
i += 8;
--sum;
}
unicode = unicode.concat(_toDecimal(unicodeBinary));
unicodeBinary = [];
}
}
//---------直接转换为结果
var strResult = '';
for(var i = 0 , len = unicode.length ; i <p style="text-align: left;">运行结果：</p><p style="text-align: left;"><img src="/static/imghwm/default1.png" data-src="https://img.php.cn/upload/article/000/061/021/ff7129c7ad325843fb52de4a20714044-0.png?x-oss-process=image/resize,p_40" class="lazy" alt=""></p><p>相信看了本文案例你已经掌握了方法，更多精彩请关注php中文网其它相关文章！</p><p>推荐阅读：</p><p><a href="http://www.php.cn/js-tutorial-398787.html" target="_blank">vuex入门教学步奏详解</a><br></p><p><a href="http://www.php.cn/js-tutorial-398785.html" target="_blank">使用vue-admin-template优化步骤详解</a><br></p>以上是怎麼使用JS實作3des+base64加密解密演算法的詳細內容。更多資訊請關注PHP中文網其他相關文章！
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Python vs. JavaScript：學習曲線和易用性Apr 16, 2025 am 12:12 AMPython更適合初學者，學習曲線平緩，語法簡潔；JavaScript適合前端開發，學習曲線較陡，語法靈活。 1.Python語法直觀，適用於數據科學和後端開發。 2.JavaScript靈活，廣泛用於前端和服務器端編程。
Python vs. JavaScript：社區，圖書館和資源Apr 15, 2025 am 12:16 AMPython和JavaScript在社區、庫和資源方面的對比各有優劣。 1)Python社區友好，適合初學者，但前端開發資源不如JavaScript豐富。 2)Python在數據科學和機器學習庫方面強大，JavaScript則在前端開發庫和框架上更勝一籌。 3)兩者的學習資源都豐富，但Python適合從官方文檔開始，JavaScript則以MDNWebDocs為佳。選擇應基於項目需求和個人興趣。
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