Difference of sha1 hashes in PHP and Node.JS for cyrillic

Question

Difference of sha1 hashes in PHP and Node.JS for cyrillic

If i try to get sha1 from "ABC" they are same if PHP and Node.JS.

function sha1(input) {
  return crypto.createHash('sha1').update(input).digest('hex');
};

But if i try to take hash of something cyrillic like this: "ЭЮЯЁ" they are not.

How to fix it?

php
node.js
sha

Answer 1

The issue is likely that the character set/encodings aren't matching.

If the string in PHP is UTF-8 encoded, you can mirror that in Node.js by specifying 'utf8':

function sha1(input) {
  return crypto.createHash('sha1').update(input, 'utf8').digest('hex');
};

> crypto.createHash('sha1').update('ЭЮЯЁ').digest('hex')
'da7f63ac9a3b5c67c8920871145cb5904f3df29a'

> crypto.createHash('sha1').update('ЭЮЯЁ', 'utf8').digest('hex')
'f78c3521413a8321231e35665f8c4a16550e182a'

'ABC' will have a better chance of matching because these are all ASCII characters and ASCII is a starting point for many other character sets. It's when you get beyond ASCII that you'll more often run into conflicts.