A Django password hasher to use for users imported from Firebase
Project description
django_firebase_scrypt
A Django password hasher based off scrypt to use for user accounts imported from Firebase.
Installation
Install dependencies according to your Python version and OS:
# Debian/Ubuntu
$ sudo apt-get install build-essential libssl-dev python-dev
# Fedora, RHEL
$ sudo yum install gcc openssl-devel python-devel
# Alpine Linux (Docker Containers)
$ apk add gcc openssl-dev python-dev
# (If you're on Python3, install the Python3 versions of the above packages)
# Mac
# Without setting the flags below, install will fail to find the necessary files
$ brew install openssl
$ export CFLAGS="-I$(brew --prefix openssl)/include $CFLAGS"
$ export LDFLAGS="-L$(brew --prefix openssl)/lib $LDFLAGS"
Then install this package
pip install django_firebase_scrypt
Usage
Add this to your hashers settings.py
like so
PASSWORD_HASHERS = (
'django_firebase_scrypt.FirebaseScryptPasswordHasher',
'django.contrib.auth.hashers.PBKDF2PasswordHasher',
'django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher',
'django.contrib.auth.hashers.SHA1PasswordHasher',
'django.contrib.auth.hashers.MD5PasswordHasher',
'django.contrib.auth.hashers.CryptPasswordHasher',
'django.contrib.auth.hashers.Argon2PasswordHasher',
'django.contrib.auth.hashers.BCryptSHA256PasswordHasher',
)
# Retrieve these from the Firebase console - see https://firebaseopensource.com/projects/firebase/scrypt/
FIREBASE_SIGNER_KEY = "jxspr8Ki0RYycVU8zykbdLGjFQ3McFUH0uiiTvC8pVMXAn210wjLNmdZJzxUECKbm0QsEmYUSDzZvpjeJ9WmXA=="
FIREBASE_SALT_SEPARATOR = "Bw=="
FIREBASE_ROUNDS = 8
FIREBASE_MEMCOST = 14
You can also move FirebaseScryptPasswordHasher
to the bottom of your hashers if you only want to use it to validate
old, migrated hashes instead of generating them for new users.
Migration
Migrate your Firebase users to Django. You can do so as follows:
# Grab your users and their password hashes using the auth:export command
$ auth:export users.json
import json
import django
django.setup()
from django.contrib.auth import get_user_model
from django_firebase_scrypt import FirebaseScryptPasswordHasher
User = get_user_model()
with open("users.json", "r") as user_file:
firebase_users = json.load(user_file)["users"]
for firebase_user in firebase_users:
django_password = f"{FirebaseScryptPasswordHasher.algorithm}${firebase_user['salt']}${firebase_user['passwordHash']}"
django_user = User(email=firebase_user["email"], password=django_password, ...any_other_user_fields)
django_user.save()
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