Question

如何使用加密模块（服务器端）和crypto-js（客户端，react-native）正确加密/解密node.js之间的数据？

注意：我在反应原生项目中使用了cryptojs，因此我无法在客户端使用加密。替换加密服务器端对我来说不是一个选择。

服务器端代码：

var Crypto = require("crypto");

var Cipher = {
  pass: "0123456789abcdef0123456789abcdef",
  iv: "0123456789abcdef",
  encript: function (msg) {
    try {
      var cipher = Crypto.createCipheriv("aes-256-cbc", this.pass, this.iv);
      var hash = cipher.update(msg, 'utf8', "hex");
      var hex = hash + cipher.final("hex");
      return hex;
    } catch (err) {
      console.error(err);
      return "";
    }
  },
  decript: function (hex){
    try {
      var decipher = Crypto.createDecipheriv("aes-256-cbc", this.pass, this.iv);
      var dec = decipher.update(hex, "hex", 'utf8');
      return dec + decipher.final('utf8');
    } catch (err) {
      console.error(err);
      return "";
    }
  }
}
Cipher.encript("i have an apple"); // 577267026f88f82ea286baf6bf089acb
Cipher.decript("577267026f88f82ea286baf6bf089acb"); // i have an apple

客户端代码

var CryptoJS = require("crypto-js");
var Cipher = {
  pass: CryptoJS.enc.Hex.parse("0123456789abcdef0123456789abcdef"),
  iv: CryptoJS.enc.Hex.parse("0123456789abcdef"),
  encript: function (msg) {
    try {
      var options = { mode: CryptoJS.mode.CBC, iv: this.iv};
      var json = CryptoJS.AES.encrypt(msg, this.pass, options);
      return json.ciphertext.toString(CryptoJS.enc.Hex);
    } catch (err) {
      console.error(err);
      return "";
    }
  },
  decript: function (hex){
    try {
      // ???????????????????????????????????
      // ???????????????????????????????????

    } catch (err) {
      console.error(err);
      return "";
    }
  }
}

Cipher.encript("i have an apple"); // 405552d9a77ea9e29442057d27cd7aee
Cipher.decript(?????);  // I have no Idea

Answer 1

您的“密码”（用作密钥而不是密码）在客户端和服务器端有两种不同的编码。在客户端上，您将其解析为Hex，但在服务器上，您将其作为二进制字符串传递，该字符串按原样使用。

您需要在服务器上解析它（现在它是AES-128而不是AES-256）：

pass: new Buffer("0123456789abcdef0123456789abcdef", "hex"),

或更改客户端上的编码（从AES-128到AES-256）：

pass: CryptoJS.enc.Utf8.parse("0123456789abcdef0123456789abcdef"),

  encript: function (msg) {
    try {
      var options = { mode: CryptoJS.mode.CBC, iv: this.iv};
      var json = CryptoJS.AES.encrypt(msg, this.pass, options);
      return json.ciphertext.toString(CryptoJS.enc.Hex);
    } catch (err) {
      console.error(err);
      return "";
    }
  },
  decript: function (hex){
    try {
      var options = { mode: CryptoJS.mode.CBC, iv: this.iv};
      var json = CryptoJS.AES.decrypt({
        ciphertext: CryptoJS.enc.Hex.parse(hex)
      }, this.pass, options);
      return json.toString(CryptoJS.enc.Utf8);
    } catch (err) {
      console.error(err);
      return "";
    }
  }

您仍有安全问题：

必须为同一密钥下的每次加密随机选择IV才能实现语义安全性。它不必是秘密的，因此您只需将其与密文一起发送即可。通常将它添加到密文并在解密之前将其切掉。
最好对您的密文进行身份验证，以便像padding oracle attack这样的攻击是不可能的。这可以通过GCM或EAX等经过身份验证的模式来完成，也可以使用具有强MAC的encrypt-then-MAC方案来完成，如CryptoJS提供的HMAC-SHA256。

Answer 2

这是示例节点js加密（https://nodejs.org/api/crypto.html）和crypto.js（https://github.com/brix/crypto-js）中的相关加密和解密。

要点-https://gist.github.com/yoavniran/c78a0991e0152b306c25

//CryptoJS example
var key = "H98zM6i/55yNJfkFsbu0HrzlFo17FtR9";
var iv = key.slice(0, 16);
//Create Key
key = CryptoJS.enc.Utf8.parse(key);
//Get Iv
iv = CryptoJS.enc.Utf8.parse(iv);
var encrypted = CryptoJS.AES.encrypt("testtest", key,{ iv: iv});
//Encrypt string
var encrypted_data = encrypted.toString();
console.log(encrypted_data)
var decrypted = CryptoJS.AES.decrypt(encrypted_data, key,{ iv: iv});
var decrypted_data = decrypted.toString(CryptoJS.enc.Utf8)
console.log(decrypted_data)


////Node JS example
  var key = "H98zM6i/55yNJfkFsbu0HrzlFo17FtR9";
  var iv = key.slice(0, 16);
  function encryptText(cipher_alg, key, iv, text, encoding) {
      var cipher = crypto.createCipheriv(cipher_alg, key, iv);
      encoding = encoding || "binary";
      var result = cipher.update(text,'utf8',  encoding);
      result += cipher.final(encoding);
      return result;
  }
  function decryptText(cipher_alg, key, iv, text, encoding) {
      var decipher = crypto.createDecipheriv(cipher_alg, key, iv);
      encoding = encoding || "binary";
      var result = decipher.update(text, encoding);
      result += decipher.final();
      return result;
  }
var encText = encryptText('aes256', key, iv, "testtest1", "base64");
console.log("encrypted text = " + encText);
var decText = decryptText('aes256', key, iv, encText, "base64");
console.log("decrypted text = " + decText);

节点crypto和crypto-js加密和解密之间的兼容性

2 个答案: