本文介绍了如何使用nodejs(crypto)生成32字节的SHA256哈希,以避免从tweetnacl.js抛出错误的密钥大小错误?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我正在使用node.js的模块来生成这样的SHA256哈希:

I am using the crypto module of node.js to generate a SHA256 hash like this:

const key = crypto.createHmac('sha256', data).digest('hex');

现在,在 secretbox 错误密钥大小 $ c>:

Now, tweetnacl throws the error: bad key size when the key is passed in the secretbox:

nacl.secretbox(data, Rnonc, key);

由于 secretbox 要求参数为Uint8Array。

The parameters are converted into Uint8Array since the secretbox requires arguments to be Uint8Array.

错误:错误密钥大小 tweetnacl 由于 crypto_secretbox_KEYBYTES 被定义为 32 。问题是从 crypto 返回的密钥大小不是32字节。

The error: bad key size is throw from here in tweetnacl since the crypto_secretbox_KEYBYTES is defined as 32 here. The problem is the key returned from crypto is in not 32 bytes size.

我搜索了SO和相关网站,但找不到任何可行的解决办法,但根据 - 转换为十六进制的SHA256哈希产生:

I have searched SO and relevant sites, but couldn't find any feasible solution but according to this - the SHA256 hash converted to hex produces:

如何使用node.js生成32字节的SHA256密钥以避免此错误?在生成SHA256哈希时,我有什么问题吗?

How can I generate a SHA256 key of 32 bytes in order to avoid this error using node.js? Is there something I am doing wrong in generating the SHA256 hash?

推荐答案

以下代码片段解决了生成32字节SHA256哈希的问题,避免了从tweetnacl.js抛出的错误密钥大小错误:

The following code snippet solved the issue of generating a 32 bytes SHA256 hash avoiding the bad key size error thrown from tweetnacl.js:

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

let hash   = CryptoJS.SHA256('hello world');
let buffer = Buffer.from(hash.toString(CryptoJS.enc.Hex), 'hex');
let array  = new Uint8Array(buffer);

这总是生成一个32字节的 Uint8Array 尺寸。请注意,我必须使用 crypto-js 模块,尽管我更喜欢使用原生加密模块,但我猜我它现在只是使用它,因为它是一个有效的解决方案。

This always generates a Uint8Array of 32 bytes size. Notice here I had to use the crypto-js module although I preferred to use the native crypto module but I guess I would just use it for now as it is a working solution.

感谢@Arihant指向(查看评论部分)

Thanks to @Arihant for pointing to this (check the comment section)

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07-31 09:19