Question

我正在尝试使用 node js模块'crypto'和 DES-ECB算法 加密/解密十六进制数据。在官方的“加密”文档中，他们给出了CBC模式下AES-192加密的示例（参见附加代码），但在ECB模式下无需iv（初始化向量）。我不知道如何使用DES算法修改此代码以在ECB模式下进行加密。

这是node js'crypto'模块（https://nodejs.org/dist/latest-v10.x/docs/api/crypto.html#crypto_class_cipher）的官方文档中提供的JavaScript代码：

const crypto = require('crypto');

const algorithm = 'aes-192-cbc';
const password = 'Password used to generate key';
// Key length is dependent on the algorithm. In this case for aes192, it is
// 24 bytes (192 bits).
// Use async `crypto.scrypt()` instead.
const key = crypto.scryptSync(password, 'salt', 24);
// Use `crypto.randomBytes()` to generate a random iv instead of the static iv
// shown here.
const iv = Buffer.alloc(16, 0); // Initialization vector.

const cipher = crypto.createCipheriv(algorithm, key, iv);

let encrypted = '';
cipher.on('readable', () => {
  let chunk;
  while (null !== (chunk = cipher.read())) {
    encrypted += chunk.toString('hex');
  }
});
cipher.on('end', () => {
  console.log(encrypted);
  // Prints: e5f79c5915c02171eec6b212d5520d44480993d7d622a7c4c2da32f6efda0ffa
});

cipher.write('some clear text data');
cipher.end();

就我而言，我必须将“算法”字段更改为：

const algorithm = 'des-ecb'

但是随后我还必须修改处理iv的部分（因为DES-ECB算法不需要iv），而且我不知道该怎么做...

非常感谢！

Answer 1

您可以尝试这种方法，这应该可以做您想要的：

const crypto = require('crypto');
const algorithm = 'des-ecb';
const password = 'some password';
// use a hex key here
const key = Buffer.from("d0e276d0144890d3", "hex");

const cipher = crypto.createCipheriv(algorithm, key, null);
let encrypted = cipher.update("Those are my principles, and if you don't like them... well, I have others.", 'utf8', 'hex');
encrypted += cipher.final('hex');
console.log("Encrypted: ", encrypted);

const decipher = crypto.createDecipheriv(algorithm, key, null);
let decrypted = decipher.update(encrypted, 'hex', 'utf8');
decrypted += decipher.final('utf8');
console.log("Decrypted: ", decrypted);

NodeJS DES ECB使用模块“ crypto”对十六进制数据进行加密

1 个答案: