Files
zulip/zerver/lib/initial_password.py
Anders Kaseorg 6e4c3e41dc python: Normalize quotes with Black.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-02-12 13:11:19 -08:00

19 lines
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Python

import base64
import hashlib
from typing import Optional
from django.conf import settings
def initial_password(email: str) -> Optional[str]:
"""Given an email address, returns the initial password for that account, as
created by populate_db."""
if settings.INITIAL_PASSWORD_SALT is not None:
encoded_key = (settings.INITIAL_PASSWORD_SALT + email).encode("utf-8")
digest = hashlib.sha256(encoded_key).digest()
return base64.b64encode(digest)[:16].decode("utf-8")
else:
# None as a password for a user tells Django to set an unusable password
return None