如何在 deno 中使用 HmacSHA256 创建(并验证)哈希?

san*_*ich 3 hash typescript deno

我知道如何在 Python 中做到这一点。

#!/usr/bin/python
import sys
import os
import hashlib
import hmac
import base64

secretKey = bytes("passw@rd", 'UTF-8')
message = bytes(f'hello world\nhello deno', 'UTF-8')
encryptedKey = base64.b64encode(hmac.new(secretKey, message, digestmod=hashlib.sha256).digest())
print(encryptedKey)
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代码输出

但我不知道如何在 den 中做到这一点。我希望在 deno 中得到与上面的 python 代码相同的结果。

jps*_*jps 5

您可以借助内置 crypto.subtle 工具(自 2021 年中期开始提供)创建 HMAC-SHA256 哈希,如下所示:

import { encode, decode } from "https://deno.land/std/encoding/base64.ts"

// just an example of the data for which we create an HMAC
const message = "hello world\nhello deno"

const encoder = new TextEncoder()

const secretKey = "passw@rd";
const keyBuf = encoder.encode(secretKey);

const key = await crypto.subtle.importKey(
  "raw",
  keyBuf,
  {name: "HMAC", hash: "SHA-256"},
  true,
  ["sign", "verify"],
)

const data = encoder.encode(message);
const result = await crypto.subtle.sign("HMAC", key , data.buffer);
console.log(encode(new Uint8Array(result)));
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kqfsOD/HMHBRL9F1Si4Y/qo9PCw2csuwXIGZK/P1IWc=

如果目标只是验证现有签名,您可以将解码后的签名传递给函数verify

// validation of a received hmac-code
const hmacBase64 = "kqfsOD/HMHBRL9F1Si4Y/qo9PCw2csuwXIGZK/P1IWc=";

const hmacDecoded = decode(hmacBase64); // Base64 decoding

const verified = await crypto.subtle.verify("HMAC", key, hmacDecoded, data.buffer);
console.log("The signature is " + (verified? "": "in") + "valid");
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签名有效


在 Deno 中引入 crypto.subtle 之前,有两种基于外部包的选择:

您可以使用God Crypto,但这需要额外的 Base64 模块。重要提示:God Crypto 所有者已停止维护该软件包,因此不建议再使用。

import { hmac } from "https://deno.land/x/god_crypto@v1.4.10/mod.ts"
import * as base64 from "https://deno.land/x/base64@v0.2.1/mod.ts"

let secretKey = "passw@rd"
let message = "hello world\nhello deno"

const result: string = base64.fromUint8Array(hmac("sha256", secretKey, message))

console.log(result)
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kqfsOD/HMHBRL9F1Si4Y/qo9PCw2csuwXIGZK/P1IWc=

或者您可以使用更方便的hmac模块,它集成了“base64”、“utf8”和“hex”的输出编码:

import { hmac } from "https://deno.land/x/hmac@v2.0.1/mod.ts";

let secretKey = "passw@rd"
let message = "hello world\nhello deno"

const result = hmac("sha256", secretKey , message , "utf8", "base64");
console.log(result)
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kqfsOD/HMHBRL9F1Si4Y/qo9PCw2csuwXIGZK/P1IWc=