node-phpass | Node implementation of the portable PHP password hashing | Hashing library

I want to authenticate WP users using my own authentication service written in Node. I have users saved in the wp_users table. Their passwords are hashed using Phpass method by WordPress. When a user is trying to log into his account, WP is using CheckPassword() method and returns boolean true/false if the password matches or not.

Now I want to use Node to compare user password to the WP hash. I found node-phpass module on NPM, which is supposed to provide the Phpass algorithm for password hashing.

It's all fine until I use international characters. Here's an example:

In WP, I set the password like this, and get a hash:

P: alamakota
H: $P$BSrncAWIY2KU7waUGLzayaon6v3gKU1

When I try to log in, WP says "All fine, come in, man"

Now, I take the hash and try to validate it using node-phpass module: