如何在nodejs中用aes-128-cbc算法解密php加密的字符串？

Question

我需要加密字符串，用这个加密的字符串发送 http 请求，然后在 nodejs 服务器中解密它。

Php 方：

$var  = openssl_encrypt('string', "aes-128-cbc", 'stringstringstri');

节点端：

let decipher = crypto.createDecipher('aes-128-cbc', 'stringstringstri');
let decrypted = decipher.update(encrypted, 'utf8', 'utf8') + decipher.final('utf8');

也试过

const initVector = crypto.randomBytes(32);
const decipher = crypto.createDecipheriv('aes-128-cbc', 'stringstringstri', initVector)
let decryptedData = decipher.update(encrypted, 'utf8', 'utf-8')
decryptedData += decipher.final('utf-8');

并收到错误： wrong final block length或this[kHandle].initiv(cipher, credential, iv, authTagLength); TypeError: Invalid initialization vector this[kHandle].initiv(cipher, credential, iv, authTagLength); TypeError: Invalid initialization vector

Answer 1

由于您没有在 PHP 中传递任何iv ，因此它使用默认的iv ，它是一个空字符串。 因此，您也需要在 Node.js 中考虑这一点。

所以变化是这样的：

const key = 'string';
const cipher = crypto.createDecipheriv('aes-128-cbc', key, Buffer.alloc(16));
const cipherEncrypted = Buffer.from(encrypted, 'base64');
const decrypted = Buffer.concat([cipher.update(cipherEncrypted), cipher.final()]);
console.log(decrypted.toString());

Answer 2

你能实施像这篇文章建议的东西吗？ https://ashish-dhodare.medium.com/implementing-aes-cbc-encryption-in-node.js-java-and-c-cross-language-encryption-42d1844119b9

function encrypt(plainString, AesKey, AesIV) {
    const cipher = crypto.createCipheriv("aes-128-cbc", AesKey, AesIV);
    let encrypted = Buffer.concat([cipher.update(Buffer.from(plainString, "utf8")), cipher.final()]);
    return encrypted.toString("base64");
}

function decrypt(base64String, AesKey, AesIV) {
    const decipher = crypto.createDecipheriv("aes-128-cbc", AesKey, AesIV);
    const deciphered = Buffer.concat([decipher.update(Buffer.from(base64String, "base64")), decipher.final()]);
    return deciphered.toString("utf8");
}

// const key = crypto.randomBytes(32); //Need 32 bytes (256 bits) key as we are using AES-256 encryption
const key = Buffer.from("J/PYjc1ftDFK5+77U1PB80v2TamokGap5yCIP2YI6tQ=", "base64");
// const iv = crypto.randomBytes(16); //Need 16 bytes (128 bits) Initialization vector as default block size is 128 bits
const iv = Buffer.from("gaOr3uvhZEwFeSbRHwlHcg==", "base64");

// Its better to pass iv and key in bytes/buffer
var encryptedData = encrypt("some data to encrypt", key, iv);
console.log(encryptedData);
// Need same key and iv for decryption otherwise it won't work
var decryptedData = decrypt(encryptedData, key, iv)
console.log(decryptedData);```