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javascript - ScryptSync 密钥不能在 createCipheriv、Nodejs、加密库中使用

问题描述

我是与编码相关的主题的新手，我无法将我的 scryptsync 密钥转换为 createCipheriv（集成到 Nodejs 中的加密库）可以在 iv 参数中使用的东西。

const algorithm = 'aes-256-gcm';
var text = 'default'
var encrypted = secret;

class Auth
{

SignUp(pass)
{
    console.log(pass);

    var pair = ec.genKeyPair(); 

    text = pair.getPrivate.toString('hex');

    var key = crypto.scryptSync(pass, 'baethrowssalt', 32);

    console.log(`The key is:${key}`); //this is not a string

    key=key.toString('hex');

    var cipher = crypto.createCipheriv(algorithm, key);  

    var encrypted = cipher.update(text, 'hex', 'hex') + cipher.final('hex');

    fs.writeFileSync(file, encrypted);

    return alert(`Close and reopen your app to integrate your wallet securely`);
}

正如您在上面看到的，我尝试将 scryptSync 返回转换为字符串十六进制，以便 createCipheriv 愿意使用它，但我收到以下错误：

pass is passrig
passrig
The key is:�→A�r;yR�����▲�h�8��f�����v�A�,
TypeError [ERR_INVALID_ARG_TYPE]: The "iv" argument must be of type string or an instance of Buffer, TypedArray, or DataView. Received undefined
    at Cipheriv.createCipherWithIV (internal/crypto/cipher.js:120:29)
    at new Cipheriv (internal/crypto/cipher.js:227:22)
    at Object.createCipheriv (crypto.js:117:10)

所以我的问题包含两个部分：如何将 scryptSync 与 createCipheriv 一起使用？为了帮助我理解，您的解决方案背后的原因是什么？

标签： javascriptnode.jsencryptionencodingscrypt

解决方案

我创建了一个示例，该示例使用算法加密一些数据aes-256-gcm并使用crypto.scryptSync从密码中派生密钥。

步骤如下：

  1. key使用 crypto.scryptSync 从我们的密码中派生出我们的密码。
  2. 使用crypto.randomBytes创建一个 IV 。
  3. 使用我们的密钥和 iv 使用我们的 encrypt 函数加密明文。
  4. 通过使用我们的解密函数解密来测试我们的加密数据。

这段代码如下：

const crypto = require("crypto");
const Algorithm = "aes-256-gcm";

function encrypt(plainText, key, iv) {
    const cipher = crypto.createCipheriv(Algorithm, key, iv);
    return { encrypted: Buffer.concat([cipher.update(plainText), cipher.final()]), authTag: cipher.getAuthTag() }
}

function decrypt(encrypted, key, iv, authTag) {
    const decipher = crypto.createDecipheriv(Algorithm, key, iv).setAuthTag(authTag);
    return Buffer.concat([decipher.update(encrypted), decipher.final()]);
}

const password = "Speak Friend and Enter";
const plainText = "There is nothing either good or bad but thinking makes it so.";

const salt = crypto.randomBytes(32);

// Create an encryption key from our password, ensuring it is 32 bytes long - AES-256 needs a 256 bit (32 byte) key 
const KEY = crypto.scryptSync(password, salt, 32);
const IV = crypto.randomBytes(16);

console.log("Key (derived from password, hex):", KEY.toString("hex"));
console.log("IV (hex):", IV.toString("hex"));
console.log("Plaintext:", plainText);
const { encrypted, authTag } = encrypt(plainText, KEY, IV);
console.log("Encrypted (hex):", encrypted.toString("hex"));
const decrypted = decrypt(encrypted, KEY, IV, authTag)
console.log("Decrypted:", decrypted.toString("utf-8"));

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