使用 Node.js 中的 Crypto 模块加密二进制 (.bin) 文件

Question

我在服务器上有一个 4MB 的二进制 (.bin) 文件，我需要对其进行加密（最好生成一个纯文本文件）并解密加密的文件，以便稍后重新生成原始的 bin 文件。 首先，我创建密码和解密对象。

const cipher = crypto.createCipheriv('aes-256-cbc', key, iv); //key, iv have been initialized before
const decipher = crypto.createDecipheriv('aes-256-cbc', key, iv); //same key and iv

之后，我尝试了以下两种方法来加密/解密文件：-

1. 加密和解密二进制数据的utf-8编码

const response = await fetch(URL) //size of response.blob() is 4194304 bytes = 4MB
const text = await response.text(); //size of text is 8206273 bytes

let encrypted = cipher.update(text, 'utf-8', 'hex');
encrypted += cipher.final('hex'); //size of encrypted is 16412576 bytes
// Save the encrypted string as 'encrypted.txt' plaintext file

let decrypted = decipher.update(encrypted, 'hex', 'utf-8'); 
decrypted += decipher.final('utf-8');//size of decrypted is 8206273 bytes
// decrypted and text have the same size and seem identical in their content

如何从decrypted .bin 文件中重新生成完全相同的 .bin 文件？

2. 使用Response的ArrayBuffer的TypedArray表示

const response = await fetch(URL)
const arrayBuffer = await response.arrayBuffer(); //size of arrayBuffer is 4194304 bytes = 4MB
const typedArray = new Uint8Array(arrayBuffer); //size of typedArray is 4194304 bytes = 4MB

let encrypted = cipher.update(typedArray) //ERROR - "list" argument must be an Array of Buffers

通过 Crypto 的文档，没有将输入和输出编码参数传递给cipher.update()导致函数需要一个Buffer / TypedArray并输出一个Buffer 。

错误在此处详细显示：

TypeError: "list" argument must be an Array of Buffers
    at Function.concat (index.js:420)
    at Splitter.push../node_modules/browserify-aes/encrypter.js.Splitter.add (encrypter.js:73)
    at Cipher.push../node_modules/browserify-aes/encrypter.js.Cipher._update (encrypter.js:29)
    at Cipher.push../node_modules/cipher-base/index.js.CipherBase.update (index.js:35)
    at _callee$ (index.js:50)
    at tryCatch (runtime.js:63)
    at Generator.invoke [as _invoke] (runtime.js:282)
    at Generator.prototype.<computed> [as next] (runtime.js:116)
    at asyncGeneratorStep (asyncToGenerator.js:3)
    at _next (asyncToGenerator.js:25)
    at asyncToGenerator.js:32
    at new Promise (<anonymous>)
    at asyncToGenerator.js:21
    at _ED (index.js:24)
    at ED (index.js:24)
    at _callee2$ (index.js:103)
    at tryCatch (runtime.js:63)
    at Generator.invoke [as _invoke] (runtime.js:282)
    at Generator.prototype.<computed> [as next] (runtime.js:116)
    at asyncGeneratorStep (asyncToGenerator.js:3)
    at _next (asyncToGenerator.js:25)

我目前陷入这个错误。 我尝试了其他变体，例如传递 Buffer 本身，但没有取得多大成功。

任何有关如何继续使用这两种方法的建议或帮助将不胜感激。

我很想知道是否存在针对此特定任务的其他更好的方法。

PS：.bin 文件是TF.js存储模型权重的方式。 样本可以发现这里在TF-集线器的SSD型号。