与 JS 和 Python 中的 sha1 不同的摘要？

Question

I've been stuck in this for a while, for the life of me.

I have this thing in python3

msg = "6NmByERB9ZDJX9OKDtIzpGl8ei7KBiYI"+"\n"+"1623776851607"+"\n"+"/api2/v2/users/me"+"\n"+"0"
message = msg.encode('utf-8')
hash_object = hashlib.sha1(message)
sha_1_sign = hash_object.hexdigest()
print(sha_1_sign)
# 4ff521a9b87ddd0dea00a842f8f5d72819f9df0a

but I cannot GET THIS SAME HASH in NodeJS, I've tried a lot of solutions; at first I though it was the first part, the encode to utf-8, because printing that was returning different results, but it seems like that's not it, it was just different representation of the same string.

My approach in JS:

const crypto = require('crypto') // maybe another library that works in browser? 
const msg = "6NmByERB9ZDJX9OKDtIzpGl8ei7KBiYI"+"\n"+"1623776851607"+"\n"+"/api2/v2/users/me"+"\n"+"0"
let shasum = crypto.createHash('sha1')
shasum.update(JSON.stringify(msg))
let hashed_string = shasum.digest('hex')
console.log(hashed_string)
// c838ca6f79551d828d6e4a810bd49c1df07b54a3

thanks for any help :)

Answer 1

Don't JSON.stringify the message. JSON.stringify adds double quotes at the beginning and end and it replaces all newlines (and most other whitespace characters) with two characters \\n . msg has length 66 and JSON.stringify(msg) has length 71. This code generates the expected SHA1 value:

const crypto = require('crypto') // maybe another library that works in browser? 
const msg = "6NmByERB9ZDJX9OKDtIzpGl8ei7KBiYI"+"\n"+"1623776851607"+"\n"+"/api2/v2/users/me"+"\n"+"0"
let shasum = crypto.createHash('sha1')
shasum.update(msg)
let hashed_string = shasum.digest('hex')
console.log(hashed_string)

Here you can see the differences between msg and JSON.stringify(msg) :

 const msg = "6NmByERB9ZDJX9OKDtIzpGl8ei7KBiYI"+"\\n"+"1623776851607"+"\\n"+"/api2/v2/users/me"+"\\n"+"0" console.log(msg) console.log(JSON.stringify(msg)); console.log(msg.length) console.log(JSON.stringify(msg).length); console.log(JSON.stringify(msg) === msg);