JavaScript AES加密和解密(高级加密标准)

时间:2018-07-26 04:29:37

标签: javascript encryption aes

如何使用JavaScript中的AES(高级加密标准)实现加密和解密。

为什么要使用AES(高级加密标准)?

安全性:与竞争性算法相比,应根据竞争算法的抗攻击能力来判断竞争算法,尽管安全强度被认为是竞争中最重要的因素。

成本::打算在全球,非排他性和免版税的基础上发布候选算法,并对其计算和内存效率进行评估。

6 个答案:

答案 0 :(得分:2)

AES是一种非常简单而强大的加密和解密方法。请参阅下面的示例,该示例在您准备好的代码中将非常易于使用。

只需调用encryptMessagedecryptMessage函数。我已经在下面提供了运行示例。

如何调用这些方法:

code.encryptMessage('Welcome to AES !','your_password');
code.decryptMessage('U2FsdGVkX1/S5oc9WgsNyZb8TJHsuL7+p4yArjEpOCYgDTUdkVxkmr+E+NdJmro9','your_password')

let code = (function(){
    return{
      encryptMessage: function(messageToencrypt = '', secretkey = ''){
        var encryptedMessage = CryptoJS.AES.encrypt(messageToencrypt, secretkey);
        return encryptedMessage.toString();
      },
      decryptMessage: function(encryptedMessage = '', secretkey = ''){
        var decryptedBytes = CryptoJS.AES.decrypt(encryptedMessage, secretkey);
        var decryptedMessage = decryptedBytes.toString(CryptoJS.enc.Utf8);

        return decryptedMessage;
      }
    }
})();

console.log(code.encryptMessage('Welcome to AES !','your_password'));
console.log(code.decryptMessage('U2FsdGVkX1/S5oc9WgsNyZb8TJHsuL7+p4yArjEpOCYgDTUdkVxkmr+E+NdJmro9','your_password'))
<!DOCTYPE html>
<html>
<head>
	<title>E2EE</title>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>
</head>
<body>

</body>
</html>

您还可以参考我的 github 代码存储库以获取更多参考。

https://github.com/shedagemayur/JavaScriptCode/tree/master/AES

答案 1 :(得分:1)

您为什么要在JavaScript中实现AES?与本地(或wasm)实现相比,这将非常慢。幸运的是,您可以访问a native implementation right in the browser(如果您做了一些更改,甚至可以访问IE11)。它非常快(根据some benchmarks posted a while ago on the Webkit blog,速度提高了数百倍),并且不需要50kb的库。

在此示例中使用GCM,但如果不需要身份验证,则可以使用CTR模式:

const key = await crypto.subtle.generateKey({name: 'AES-GCM', length: 128}, true, ['encrypt', 'decrypt'])
const text = "confidential message"
// IV must be the same length (in bits) as the key
const iv = await crypto.getRandomValues(new Uint8Array(16))
const cyphertext = await crypto.subtle.encrypt({name: 'AES-GCM', tagLength: 32, iv}, key, new TextEncoder().encode(text))

这将导致cyphertext包含一个带有加密字符串和4字节身份验证标签的ArrayBuffer(特定于GCM,其他AES模式将只生成加密数据)。只要拥有用于加密的密钥和IV,就可以轻松解密。

const cleartext = await crypto.subtle.decrypt({name: 'AES-GCM', tagLength: 32, iv}, key, cyphertext)
console.log(new TextDecoder().decode(cleartext))

答案 2 :(得分:1)

function encrypt(message = '', key = ''){
    var message = CryptoJS.AES.encrypt(message, key);
    return message.toString();
}
function decrypt(message = '', key = ''){
    var code = CryptoJS.AES.decrypt(message, key);
    var decryptedMessage = code.toString(CryptoJS.enc.Utf8);

    return decryptedMessage;
}
console.log(encrypt('Hello World'));
console.log(decrypt('U2FsdGVkX1/0oPpnJ5S5XTELUonupdtYCdO91v+/SMs='))
<script src="https://cdnjs.cloudflare.com/ajax/libs/crypto-js/3.1.2/rollups/aes.js"></script>

答案 3 :(得分:0)

下面的代码对我有用

encryptMessage: function(messageToencrypt = '', secretkey = ''){
    var encryptedMessage = CryptoJS.AES.encrypt(messageToencrypt, secretkey);
    return encryptedMessage.toString();
},
decryptMessage: function(encryptedMessage = '', secretkey = ''){
    var decryptedBytes = CryptoJS.AES.decrypt(encryptedMessage, secretkey);
    var decryptedMessage = decryptedBytes.toString(CryptoJS.enc.Utf8);

    return decryptedMessage;
}

谢谢

答案 4 :(得分:0)

如果您要构建React或Node.js应用,则只需使用此库ncrypt-js即可加密和解密数据。

See example on codesandbox

用法:

es5

Select 
    Buying.Customer_ID, Buying.Product_ID, Product.ID, 
    Product.Name, Customer.ID, 
    Customer.Customer_FName, Customer.Customer_Lname
from
    ((Buying
inner join 
    Product on Buying.Product_ID = Product.ID)
inner join 
    Customer on Buying.Customer_ID = Customer.ID)
where
    Product.Address like '%Burwood%';

es6

var ncrypt = require('ncrypt-js'); // or var { encrypt, decrypt } = require('ncrypt-js);

let encryptData = ncrypt.encrypt('super secret data', 'secret_key');
// or
// let encryptData = encrypt('super secret data', 'secret_key');

console.log(encryptData); // 11ab949601eb136f58ac3fe846e30d76.f9ce133b20adc35eef32af95957547abbb6fbfc5cb91cd14f5b0a088bd031883963cde1a56fd62fe2aeb75451a065d21
var decryptedData = ncrypt.decrypt(encryptData);
// or
// var decryptedData = decrypt(encryptData);

console.log(decryptedData); // super secret data

答案 5 :(得分:0)

我已经构建了一个名为encrypt-with-password的NPM程序包,该程序包允许您使用AES并使用PBDKF2从密码中导出AES密钥,从而使用密码来加密和解密文本和JavaScript对象。

安装:

npm install encrypt-with-password

或:

yarn add encrypt-with-password

加密和解密文本:

const encryptpwd = require('encrypt-with-password');

const text = 'Hello, World!';
const password = 'examplepassword';

const encrypted = encryptpwd.encrypt(text, password); // ---> this is the encrypted (output) value

// example encrypted value: 'e68e7ccd9e908665818a49f111c342ed:c9b83ff7624bb3b26af8cc853d61cd2f7959cecc4308383c39a0924e90637889'

const decrypted = encryptpwd.decrypt(encrypted, password) // ---> this decrypts the encrypted value and yields the original text

加密和解密JavaScript对象:

const encryptpwd = require('encrypt-with-password');

const jsObject = {
  aString: 'Lorem ipsum dolor sit amet, consectetur adipisicing elit.',
  aNumber: 5,
  anArray: [1, 2, 3, 4, 5],
  anObj: {
    aKey: 'a value'
  }
};
const password = 'examplepassword2';

const encrypted = encryptpwd.encryptJSON(jsObject, password); // ---> this is the encrypted value

// example encrypted value: 'f953284ffe3e44a7b9de8487b50c3449:123378b5c481399488f520ebb774b076b85a12bc0f9a67cf8faf359eb4f804fc0594bc42374a20b4216b1312d7a408cf94517e19dfcada5513c49f6d13d26c982c562904306900a3f777b9c19b9c002e12dd216984f68566684f9f0259a45e007a0cecb2325333faafb18ed0e751933d8b1195b02b2adda29269cf1c6fa6fff73f0bac4abcf58b391521e0382c06a5f01f31c1243d827f8c7076f81d7f530259a3ae459e524bee80230672f153ab6a4e'

const decrypted = encryptpwd.decryptJSON(encrypted, password) // ---> this decrypts the encrypted value and yields the original object

此软件包背后的代码是开源的:https://github.com/xtrp/encrypt-with-password