mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-17 07:01:33 +00:00
49 lines
1.2 KiB
Python
49 lines
1.2 KiB
Python
from atexit import register
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from tempfile import gettempdir
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from os import urandom, chmod, remove
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from os.path import exists, join
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from stat import S_IRUSR, S_IWUSR, S_IXUSR
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from tfw.internals.lazy import lazy_property
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from tfw.internals.ref_counter import RefCounter
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KEYFILE = join(gettempdir(), 'tfw-auth.key')
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LOCKFILE = join(gettempdir(), 'tfw-auth.lock')
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class KeyManagerRefCounter(RefCounter):
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def deallocate(self):
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if exists(KEYFILE):
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remove(KEYFILE)
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class KeyManager:
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keyfile = KEYFILE
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refcounter = KeyManagerRefCounter(LOCKFILE)
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def __init__(self):
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if not exists(self.keyfile):
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self._init_auth_key()
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@lazy_property
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def auth_key(self):
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with open(self.keyfile, 'rb') as ifile:
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return ifile.read()
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def _init_auth_key(self):
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key = self.generate_key()
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with open(self.keyfile, 'wb') as ofile:
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ofile.write(key)
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self._chmod_700_keyfile()
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return key
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@staticmethod
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def generate_key():
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return urandom(32)
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def _chmod_700_keyfile(self):
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chmod(self.keyfile, S_IRUSR | S_IWUSR | S_IXUSR)
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register(KeyManager.refcounter.teardown_instance)
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