63 lines
1.7 KiB
Python
63 lines
1.7 KiB
Python
#!/usr/bin/env python3
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"""Various utility functions"""
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import json
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import portalocker
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from flask import current_app
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USERDATA_FILE = "/etc/nixos/userdata/userdata.json"
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def get_domain():
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"""Get domain from /var/domain without trailing new line"""
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with open("/var/domain", "r", encoding="utf-8") as domain_file:
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domain = domain_file.readline().rstrip()
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return domain
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class WriteUserData(object):
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"""Write userdata.json with lock"""
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def __init__(self):
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self.userdata_file = open(
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USERDATA_FILE, "r+", encoding="utf-8"
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)
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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):
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self.userdata_file = open(
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USERDATA_FILE, "r", encoding="utf-8"
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)
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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):
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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. It may be ssh-ed25519 or ssh-rsa."""
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if not key.startswith("ssh-ed25519"):
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if not key.startswith("ssh-rsa"):
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return False
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return True
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