在Node.js中加密文本并从iOS应用程序解密

Question

我正在使用当前的解决方案来加密来自Node.js的文本和解密来自iOS应用程序的文本。https://stackoverflow.com/a/27893935/2977578

来自Node.js的加密可以工作，但是CryptoJS非常慢。为了提高速度，我正在尝试移植这段代码，以便在Node.js中使用内置的crypto module，但我不是这些函数方面的专家。仅仅使用内置的加密模块就可以让这段代码工作吗？

var password = "...";
var salt = "...";
var iv64 = "...";
var hash = CryptoJS.SHA256(salt);
var key = CryptoJS.PBKDF2(password, hash, { keySize: 256/32, iterations: 1000 });
var iv  = CryptoJS.enc.Base64.parse(iv64);
var encrypted = CryptoJS.AES.encrypt(message, key, { iv: iv });
return encrypted.ciphertext.toString(CryptoJS.enc.Base64);

Answer 1

我已经使用内置的Node.js加密模块实现了这个加密逻辑，我也使用了两个crypto-js函数对相同的明文进行了加密，并对它们进行了解码，以确保结果是一致的：

const CryptoJS = require('crypto-js');
const crypto = require("crypto");

function encrypt_cryptojs(message, password, iv64, salt) {
    var hash = CryptoJS.SHA256(salt);
    var key = CryptoJS.PBKDF2(password, hash, { keySize: 256/32, iterations: 1000 });
    var iv  = CryptoJS.enc.Base64.parse(iv64);
    var encrypted = CryptoJS.AES.encrypt(message, key, { iv: iv });
    return encrypted.ciphertext.toString(CryptoJS.enc.Base64);
}

// Use built-in crypto module.
function encrypt(message, password, iv64, salt) {
    const iv = Buffer.from(iv64, 'base64');
    const hash = crypto.createHash('sha256').update(salt, 'utf8').digest()
    const key = crypto.pbkdf2Sync(password, hash, 1000, 32, null);

    const cipher = crypto.createCipheriv('aes-256-cbc', key, iv);
    let encrypted = cipher.update(message, 'utf8', 'base64')
    encrypted += cipher.final('base64');
    return encrypted;
}

function decrypt(messagebase64, password, iv64) {

    const iv = Buffer.from(iv64, 'base64');
    const hash = crypto.createHash('sha256').update(salt, 'utf8').digest()
    const key = crypto.pbkdf2Sync(password, hash, 1000, 32, null);

    const decipher = crypto.createDecipheriv('aes-256-cbc', key, iv);
    let decrypted = decipher.update(messagebase64, 'base64');
    decrypted += decipher.final();
    return decrypted;
}

const plaintext = "If you prick us do we not bleed? If you tickle us do we not laugh";
const salt = "some salt";
const password = crypto.scryptSync("some password", salt, 16).toString("base64");
const iv64 = "XxbSho8OZacvQwXC6S5RQw==";

console.log("Ciphertext (crypto js):", encrypt_cryptojs(plaintext, password, iv64, salt));
console.log("Ciphertext (built-in crypto module):", encrypt(plaintext, password, iv64, salt));
console.log("Decrypted (crypto js):", decrypt(encrypt_cryptojs(plaintext, password, iv64, salt), password, iv64));
console.log("Decrypted (built-in crypto module):", decrypt(encrypt(plaintext, password, iv64, salt), password, iv64));