mirror of
https://git.selfprivacy.org/SelfPrivacy/selfprivacy-rest-api.git
synced 2024-08-19 15:02:58 +00:00
202 lines
5.7 KiB
Python
202 lines
5.7 KiB
Python
#!/usr/bin/env python3
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"""Various utility functions"""
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import datetime
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from enum import Enum
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import json
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import os
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import subprocess
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import portalocker
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import typing
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USERDATA_FILE = "/etc/nixos/userdata.json"
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SECRETS_FILE = "/etc/selfprivacy/secrets.json"
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DKIM_DIR = "/var/dkim/"
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class UserDataFiles(Enum):
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"""Enum for userdata files"""
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USERDATA = 0
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SECRETS = 3
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def get_domain():
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"""Get domain from userdata.json"""
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with ReadUserData() as user_data:
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return user_data["domain"]
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class WriteUserData(object):
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"""Write userdata.json with lock"""
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def __init__(self, file_type=UserDataFiles.USERDATA):
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if file_type == UserDataFiles.USERDATA:
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self.userdata_file = open(USERDATA_FILE, "r+", encoding="utf-8")
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elif file_type == UserDataFiles.SECRETS:
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# Make sure file exists
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if not os.path.exists(SECRETS_FILE):
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with open(SECRETS_FILE, "w", encoding="utf-8") as secrets_file:
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secrets_file.write("{}")
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self.userdata_file = open(SECRETS_FILE, "r+", encoding="utf-8")
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else:
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raise ValueError("Unknown file type")
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portalocker.lock(self.userdata_file, portalocker.LOCK_EX)
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self.data = json.load(self.userdata_file)
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def __enter__(self):
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return self.data
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def __exit__(self, exc_type, exc_value, traceback):
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if exc_type is None:
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self.userdata_file.seek(0)
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json.dump(self.data, self.userdata_file, indent=4)
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self.userdata_file.truncate()
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portalocker.unlock(self.userdata_file)
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self.userdata_file.close()
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class ReadUserData(object):
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"""Read userdata.json with lock"""
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def __init__(self, file_type=UserDataFiles.USERDATA):
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if file_type == UserDataFiles.USERDATA:
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self.userdata_file = open(USERDATA_FILE, "r", encoding="utf-8")
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elif file_type == UserDataFiles.SECRETS:
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if not os.path.exists(SECRETS_FILE):
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with open(SECRETS_FILE, "w", encoding="utf-8") as secrets_file:
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secrets_file.write("{}")
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self.userdata_file = open(SECRETS_FILE, "r", encoding="utf-8")
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else:
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raise ValueError("Unknown file type")
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portalocker.lock(self.userdata_file, portalocker.LOCK_SH)
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self.data = json.load(self.userdata_file)
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def __enter__(self) -> dict:
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return self.data
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def __exit__(self, *args):
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portalocker.unlock(self.userdata_file)
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self.userdata_file.close()
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def validate_ssh_public_key(key):
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"""Validate SSH public key.
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It may be ssh-ed25519, ssh-rsa or ecdsa-sha2-nistp256."""
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if not key.startswith("ssh-ed25519"):
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if not key.startswith("ssh-rsa"):
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if not key.startswith("ecdsa-sha2-nistp256"):
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return False
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return True
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def is_username_forbidden(username):
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forbidden_prefixes = ["systemd", "nixbld"]
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forbidden_usernames = [
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"root",
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"messagebus",
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"postfix",
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"polkituser",
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"dovecot2",
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"dovenull",
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"nginx",
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"postgres",
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"prosody",
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"opendkim",
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"rspamd",
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"sshd",
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"selfprivacy-api",
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"restic",
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"redis",
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"pleroma",
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"ocserv",
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"nextcloud",
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"memcached",
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"knot-resolver",
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"gitea",
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"bitwarden_rs",
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"vaultwarden",
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"acme",
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"virtualMail",
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"nobody",
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]
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for prefix in forbidden_prefixes:
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if username.startswith(prefix):
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return True
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for forbidden_username in forbidden_usernames:
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if username == forbidden_username:
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return True
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return False
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def parse_date(date_str: str) -> datetime.datetime:
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"""Parse date string which can be in one of these formats:
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- %Y-%m-%dT%H:%M:%S.%fZ
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- %Y-%m-%dT%H:%M:%S.%f
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- %Y-%m-%d %H:%M:%S.%fZ
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- %Y-%m-%d %H:%M:%S.%f
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"""
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try:
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return datetime.datetime.strptime(date_str, "%Y-%m-%d %H:%M:%S.%fZ")
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except ValueError:
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pass
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try:
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return datetime.datetime.strptime(date_str, "%Y-%m-%d %H:%M:%S.%f")
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except ValueError:
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pass
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try:
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return datetime.datetime.strptime(date_str, "%Y-%m-%dT%H:%M:%S.%fZ")
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except ValueError:
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pass
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try:
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return datetime.datetime.strptime(date_str, "%Y-%m-%dT%H:%M:%S.%f")
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except ValueError:
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pass
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raise ValueError("Invalid date string")
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def parse_dkim(dkim: str) -> str:
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# extract key from file
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dkim = dkim.split("(")[1]
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dkim = dkim.split(")")[0]
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# replace all quotes with nothing
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dkim = dkim.replace('"', "")
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# trim whitespace, remove newlines and tabs
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dkim = dkim.strip()
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dkim = dkim.replace("\n", "")
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dkim = dkim.replace("\t", "")
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# remove all redundant spaces
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dkim = " ".join(dkim.split())
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return dkim
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def get_dkim_key(domain: str, parse: bool = True) -> typing.Optional[str]:
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"""Get DKIM key from /var/dkim/<domain>.selector.txt"""
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dkim_path = os.path.join(DKIM_DIR, domain + ".selector.txt")
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if os.path.exists(dkim_path):
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with open(dkim_path, encoding="utf-8") as dkim_file:
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dkim = dkim_file.read()
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if parse:
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dkim = parse_dkim(dkim)
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return dkim
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return None
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def hash_password(password):
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hashing_command = ["mkpasswd", "-m", "sha-512", password]
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password_hash_process_descriptor = subprocess.Popen(
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hashing_command,
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shell=False,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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)
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hashed_password = password_hash_process_descriptor.communicate()[0]
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hashed_password = hashed_password.decode("ascii")
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hashed_password = hashed_password.rstrip()
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return hashed_password
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