CryptoJS中加密解密的Javascript加密

Question

我试图加密服务器端（加密节点）和解密客户端（CryptoJS）。我可以使用cryptoJS创建密钥，并且可以在使用相同单独的库时进行加密和解密，但问题是我无法使用Crypto加密，而是使用CryptoJS进行解密，这是真实世界的场景。没有错误，只是一个空的回应。

任何帮助非常感谢请！

iv = crypto.randomBytes(16), 
orig = 'A confidential message.'; 
//Crypto JS creates key 
var password = "sixteen byte key"; 
var salt = CryptoJS.lib.WordArray.random(128/8); 
var key = CryptoJS.PBKDF2(password, salt, { keySize: 128/32, iterations: 1000 }); 
console.log("step1 generated key: "+ key); 

//Convert key for crypto use - as a Buffer 
var hashHex = key.toString(CryptoJS.enc.Hex); 
var hash = new Buffer(hashHex,'hex'); 

//Test encryption and decryption with crypto (Node) 
//use CryptoJS key to encrypt data using crypto cipheriv 
var cipher2 = crypto.createCipheriv('aes-128-cbc', hash, iv); //iv must be a buffer 
var encrypted1 = cipher2.update(orig, 'utf8', 'hex'); 
var encrypted2 = encrypted1 += cipher2.final('hex'); 
console.log("Crypto string:", encrypted2.toString()); 

// Start decrypt 
var decipher = crypto.createDecipheriv('aes-128-cbc', hash, iv); 
var dec = decipher.update(encrypted2, 'hex', 'utf8') 
dec += decipher.final('utf8'); 
console.log("Crypto decrypted msg:", dec); 

//test with crypto JS (ie the client) 
//CryptoJS key is a string 
var encryptedCJS = CryptoJS.AES.encrypt(orig, key.toString(), { iv: iv, mode: CryptoJS.mode.CBC}); 
console.log("CryptoJS encrypted: "+encryptedCJS); 

var decryptedCryptoJS = CryptoJS.AES.decrypt(encryptedCJS, key.toString(), { mode: CryptoJS.mode.CBC, iv: iv }); 
console.log("CryptoJS decrypted msg: "+decryptedCryptoJS.toString(CryptoJS.enc.Utf8)); 

//This part does not work - use message encrypted by crypto but cannot decrypt with CryptoJS. decryptedCryptoJSFinal is empty 
var decryptedCryptoJSFinal = CryptoJS.AES.decrypt(encrypted2, key.toString(), {iv: iv, mode: CryptoJS.mode.CBC}); 
console.log("FINAL CryptoJS decrypted: "+decryptedCryptoJSFinal.toString(CryptoJS.enc.Utf8)); 

我认为密码加密的输出必须是不同的格式才能输出CryptoJS加密，但我找不到问题。总的来说，我打算发送加密的数据作为JSON在CryptoJS的客户端上进行解密。

Answer 1

我认为你的问题出现在客户端，如果你将'key'和'iv'作为字符串传递给'CryptoJS.AES.encrypt'，那么CryptoJS会将你的'key'和一个随机'salt'为密码生成不同的密钥。您可以使用相同的密钥和iv来验证它是否从相同的clearText生成不同的cipherText，因为每次运行该函数时都会在CryptoJS内部生成不同的密钥。

为了避免这种情况，您需要传递'key'和'iv'编码（取决于您使用的代码，在'hex'或'base64'中），然后CryptoJS解释它不必生成一个秘密密钥并将您的'密钥'加密。

检查这个例子：

//BACKEND with node crypto aes-256-cbc-> generate key and ciphertext 
///////////////////////////////////////////////////////////////////// 
var crypto = require('crypto'); 
var algorithm = 'aes-256-cbc'; 
var inputEncoding = 'utf8'; 
var outputEncoding = 'base64'; 
var pt = 'HELLO'; 

//generate key and iv 
var masterKey = "253D3FB468A0E24677C28A624BE0F939"; 
var salt = "0000000000000000"; 
var keySize = 256/8; 
var ivSize = 128/8; 
var iterations = 100; 
var outputKey = crypto.pbkdf2Sync(masterKey, salt, iterations, keySize+ivSize, "sha1"); 

// obtain key and IV splitting outputKey 
var buffer = new Buffer(outputKey, inputEncoding); 
var secretKey = buffer.slice(0, keySize); 
var iv = buffer.slice(keySize, (keySize+ivSize)); 

console.log('secretKey->',secretKey.toString('base64')); 
console.log('iv->',iv.toString('base64'));  

//encrypt 
var encrypt = crypto.createCipheriv(algorithm, secretKey, iv); 
var encrypted = encrypt.update(pt, inputEncoding, outputEncoding); 
encrypted += encrypt.final(outputEncoding); 
console.log('Ciphering "%s"', pt); 
//We obtain a 
console.log('CipherText base64' string "%s ', encrypted.toString()); 



//FRONTEND with node CryptoJS aes-256-cbc-> generate same key and obtain cleartext 
//////////////////////////////////////////////////////////////////// 
var masterKey = "253D3FB468A0E24677C28A624BE0F939"; 
var salt ="0000000000000000"; 
var iterations = 100; 
var keySize = 256; 
var ivSize = 128; 
var outputKey = CryptoJS.PBKDF2(masterKey, salt, { 
    keySize: (keySize+ivSize)/32, 
    iterations: iterations 
}); 
// the underlying words arrays might have more content than was asked: remove insignificant words 
outputKey.clamp(); 

// split key and IV 
var secretKey = CryptoJS.lib.WordArray.create(outputKey.words.slice(0, 
keySize/32)); 
var iv = CryptoJS.lib.WordArray.create(outputKey.words.slice(keySize/32)); 

console.log('secretKey->', secretKey.toString(CryptoJS.enc.Base64)); 
console.log('iv->', iv.toString(CryptoJS.enc.Base64)); 

var decrypted = CryptoJS.AES.decrypt(ct, secretKey,{iv: iv});//Default mode CBC { mode: CryptoJS.mode.CFB }); 
console.log('CipherText->', ct); 
console.log('ClearText decrypted', decrypted.toString(CryptoJS.enc.Utf8));