初始化向量IV-> toString('hex') -> 写入文件-> 从文件读取-> hex 到bin-> UndefinedUndefined 等NodeJS

如何解决初始化向量IV-> toString('hex') -> 写入文件-> 从文件读取-> hex 到bin-> UndefinedUndefined 等NodeJS

我正在尝试将初始化向量存储为字符串十六进制，然后将其检索回二进制，但是当我将 结果打印到控制台时，它显示以下内容：

/// <summary>
///  Returns all projects
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
[ProducesResponseType(StatusCodes.Status200OK)]
[ProducesResponseType(StatusCodes.Status400BadRequest)]
[ProducesResponseType(StatusCodes.Status500InternalServerError)]
[ProducesDefaultResponseType]
[HttpGet]
public async Task<IActionResult> Get(int? id)
{
    return Ok(await Mediator.Send(new GetProjectsQuery { Id = id }));
}

为什么打印 undefined？我怎样才能达到预期的结果？ 假设正确生成了 IV...

相关代码：

fIV: undefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefinedundefined; Passphrase: passrig

SignUp 函数中的相关片段，我正在写入 IV 文件：

SignIn(pass)
{
    console.log(`fIV: ${h2b(fIV)}; Passphrase: ${pass}`);
    const key = crypto.scryptSync(pass,'baethrowssalt',32);
    var decipher = crypto.createDecipheriv(algorithm,key,h2b(fIV)); 
    var decrypted = decipher.update(secret,'hex','binary') + decipher.final('binary');

    if(encrypted !== crypto.createCipheriv(algorithm,key).update(decrypted,'binary','hex') + cipher.final('hex'))
    {
        return alert(`access denied: encrypted:${encrypted},secret:${secret}`);
    };
    return Buffer.from(decrypted,'hex');

}

h2b(hex){
    return (parseInt(hex,16).toString(2)).padStart(8,'0');
}

解决方法

我创建了一个将 IV 写入文件然后再次读取的示例。我们对文件数据使用十六进制编码。如果您不需要观察它，将二进制形式的 IV 写入文件可能会更容易，我已经包含了两者的示例。

const crypto = require("crypto");
const fs = require("fs");

// Write the IV to file in hex format and read it back again...
function testIVFileHex() {
    const IV = crypto.randomBytes(32);
    console.log("testIVFileHex: IV (write to file):  " + IV.toString("hex"));
    fs.writeFileSync("iv.txt",IV.toString("hex"));

    const IVFromFile = Buffer.from(fs.readFileSync("iv.txt","utf-8"),"hex");
    console.log("testIVFileHex: IV (read from file): " + IVFromFile.toString("hex"));
}

// Write the IV to file in binary format and read it back again...
function testIVFileBinary() {
    const IV = crypto.randomBytes(32);
    console.log("testIVFileBinary: IV (write to file):  " + IV.toString("hex"));
    fs.writeFileSync("iv.dat",IV);

    const IVFromFile = fs.readFileSync("iv.dat");
    console.log("testIVFileBinary: IV (read from file): " + IVFromFile.toString("hex"));
}

// On could use either function
testIVFileHex()
testIVFileBinary()