ScryptSync密钥不能在createCipheriv、Nodejs、Crypto-lib中使用

Question

我是编码相关主题的新手，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参数中使用的密钥。

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，但我得到了以下错误：

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？

Answer 1

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

步骤如下：

1. 使用crypto.scryptSync从密码中派生key
2. 使用crypto.randomBytes创建IV
3. 使用我们的密钥和iv使用我们的加密功能对明文进行加密
4. 通过使用我们的解密功能进行解密来测试我们的加密数据

此代码如下：

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"));