mirror of
https://github.com/openSUSE/osc.git
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319 lines
9.8 KiB
Python
319 lines
9.8 KiB
Python
import importlib
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import bz2
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import base64
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import getpass
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try:
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from urllib.parse import urlsplit
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except ImportError:
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from urlparse import urlsplit
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try:
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import keyring
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except ImportError:
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keyring = None
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try:
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import gnomekeyring
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except ImportError:
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gnomekeyring = None
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class AbstractCredentialsManagerDescriptor(object):
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def name(self):
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raise NotImplementedError()
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def description(self):
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raise NotImplementedError()
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def create(self, cp):
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raise NotImplementedError()
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def __lt__(self, other):
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return self.name() < other.name()
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class AbstractCredentialsManager(object):
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config_entry = 'credentials_mgr_class'
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def __init__(self, cp, options):
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super(AbstractCredentialsManager, self).__init__()
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self._cp = cp
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self._process_options(options)
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@classmethod
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def create(cls, cp, options):
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return cls(cp, options)
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def get_password(self, url, user, defer=True):
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# If defer is True a callable can be returned
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# and the password is retrieved if the callable
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# is called. Implementations are free to ignore
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# defer parameter and can directly return the password.
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# If defer is False the password is directly returned.
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raise NotImplementedError()
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def set_password(self, url, user, password):
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raise NotImplementedError()
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def delete_password(self, url, user):
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raise NotImplementedError()
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def _qualified_name(self):
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return qualified_name(self)
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def _process_options(self, options):
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pass
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class PlaintextConfigFileCredentialsManager(AbstractCredentialsManager):
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def get_password(self, url, user, defer=True):
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return self._cp.get(url, 'pass', raw=True)
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def set_password(self, url, user, password):
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self._cp.set(url, 'pass', password)
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self._cp.set(url, self.config_entry, self._qualified_name())
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def delete_password(self, url, user):
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self._cp.remove_option(url, 'pass')
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def _process_options(self, options):
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if options is not None:
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raise RuntimeError('options must be None')
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class PlaintextConfigFileDescriptor(AbstractCredentialsManagerDescriptor):
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def name(self):
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return 'Config file credentials manager'
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def description(self):
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return 'Store the credentials in the config file (plain text)'
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def create(self, cp):
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return PlaintextConfigFileCredentialsManager(cp, None)
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class ObfuscatedConfigFileCredentialsManager(
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PlaintextConfigFileCredentialsManager):
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def get_password(self, url, user, defer=True):
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if self._cp.has_option(url, 'passx', proper=True):
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passwd = self._cp.get(url, 'passx', raw=True)
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else:
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passwd = super(self.__class__, self).get_password(url, user)
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return self.decode_password(passwd)
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def set_password(self, url, user, password):
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compressed_pw = bz2.compress(password.encode('ascii'))
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password = base64.b64encode(compressed_pw).decode("ascii")
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super(self.__class__, self).set_password(url, user, password)
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def delete_password(self, url, user):
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self._cp.remove_option(url, 'passx')
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super(self.__class__, self).delete_password(url, user)
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@classmethod
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def decode_password(cls, password):
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compressed_pw = base64.b64decode(password.encode("ascii"))
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return bz2.decompress(compressed_pw).decode("ascii")
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class ObfuscatedConfigFileDescriptor(AbstractCredentialsManagerDescriptor):
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def name(self):
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return 'Obfuscated Config file credentials manager'
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def description(self):
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return 'Store the credentials in the config file (obfuscated)'
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def create(self, cp):
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return ObfuscatedConfigFileCredentialsManager(cp, None)
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class TransientCredentialsManager(AbstractCredentialsManager):
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def __init__(self, *args, **kwargs):
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super(self.__class__, self).__init__(*args, **kwargs)
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self._password = None
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def _process_options(self, options):
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if options is not None:
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raise RuntimeError('options must be None')
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def get_password(self, url, user, defer=True):
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if defer:
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return self
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return self()
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def set_password(self, url, user, password):
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self._password = password
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self._cp.set(url, self.config_entry, self._qualified_name())
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def delete_password(self, url, user):
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self._password = None
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def __call__(self):
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if self._password is None:
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self._password = getpass.getpass('Password: ')
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return self._password
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class TransientDescriptor(AbstractCredentialsManagerDescriptor):
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def name(self):
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return 'Transient password store'
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def description(self):
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return 'Do not store the password and always ask for the password'
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def create(self, cp):
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return TransientCredentialsManager(cp, None)
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class KeyringCredentialsManager(AbstractCredentialsManager):
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def _process_options(self, options):
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if options is None:
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raise RuntimeError('options may not be None')
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self._backend_cls_name = options
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def _load_backend(self):
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keyring_backend = keyring.core.load_keyring(self._backend_cls_name)
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keyring.set_keyring(keyring_backend)
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@classmethod
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def create(cls, cp, options):
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if not has_keyring_support():
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return None
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return super(cls, cls).create(cp, options)
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def get_password(self, url, user, defer=True):
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self._load_backend()
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return keyring.get_password(urlsplit(url)[1], user)
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def set_password(self, url, user, password):
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self._load_backend()
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keyring.set_password(urlsplit(url)[1], user, password)
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config_value = self._qualified_name() + ':' + self._backend_cls_name
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self._cp.set(url, self.config_entry, config_value)
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def delete_password(self, url, user):
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self._load_backend()
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keyring.delete_password(urlsplit(url)[1], user)
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class KeyringCredentialsDescriptor(AbstractCredentialsManagerDescriptor):
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def __init__(self, keyring_backend):
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self._keyring_backend = keyring_backend
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def name(self):
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return self._keyring_backend.name
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def description(self):
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return 'Backend provided by python-keyring'
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def create(self, cp):
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qualified_backend_name = qualified_name(self._keyring_backend)
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return KeyringCredentialsManager(cp, qualified_backend_name)
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class GnomeKeyringCredentialsManager(AbstractCredentialsManager):
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@classmethod
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def create(cls, cp, options):
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if gnomekeyring is None:
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return None
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return super(cls, cls).create(cp, options)
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def get_password(self, url, user, defer=True):
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gk_data = self._keyring_data(url, user)
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if gk_data is None:
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return None
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return gk_data['password']
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def set_password(self, url, user, password):
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scheme, host, path = self._urlsplit(url)
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gnomekeyring.set_network_password_sync(
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user=user,
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password=password,
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protocol=scheme,
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server=host,
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object=path)
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self._cp.set(url, self.config_entry, self._qualified_name())
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def delete_password(self, url, user):
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gk_data = self._keyring_data(url, user)
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if gk_data is None:
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return
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gnomekeyring.item_delete_sync(gk_data['keyring'], gk_data['item_id'])
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def get_user(self, url):
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gk_data = self._keyring_data(url, None)
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if gk_data is None:
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return None
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return gk_data['user']
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def _keyring_data(self, url, user):
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scheme, host, path = self._urlsplit(url)
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try:
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entries = gnomekeyring.find_network_password_sync(protocol=scheme,
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server=host,
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object=path)
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except gnomekeyring.NoMatchError:
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return None
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for entry in entries:
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if 'user' not in entry or 'password' not in entry:
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continue
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if user is None or entry['user'] == user:
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return entry
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return None
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def _urlsplit(self, url):
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splitted_url = urlsplit(url)
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return splitted_url.scheme, splitted_url.netloc, splitted_url.path
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class GnomeKeyringCredentialsDescriptor(AbstractCredentialsManagerDescriptor):
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def name(self):
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return 'GNOME Keyring Manager (deprecated)'
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def description(self):
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return 'Deprecated GNOME Keyring Manager. If you use \
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this we will send you a Dial-In modem'
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def create(self, cp):
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return GnomeKeyringCredentialsManager(cp, None)
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def get_credentials_manager_descriptors():
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if has_keyring_support():
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backend_list = keyring.backend.get_all_keyring()
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else:
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backend_list = []
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descriptors = []
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for backend in backend_list:
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descriptors.append(KeyringCredentialsDescriptor(backend))
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descriptors.sort()
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if gnomekeyring:
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descriptors.append(GnomeKeyringCredentialsDescriptor())
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descriptors.append(PlaintextConfigFileDescriptor())
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descriptors.append(ObfuscatedConfigFileDescriptor())
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descriptors.append(TransientDescriptor())
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return descriptors
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def get_keyring_credentials_manager(cp):
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keyring_backend = keyring.get_keyring()
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return KeyringCredentialsManager(cp, qualified_name(keyring_backend))
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def create_credentials_manager(url, cp):
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config_entry = cp.get(url, AbstractCredentialsManager.config_entry)
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if ':' in config_entry:
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creds_mgr_cls, options = config_entry.split(':', 1)
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else:
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creds_mgr_cls = config_entry
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options = None
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mod, cls = creds_mgr_cls.rsplit('.', 1)
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return getattr(importlib.import_module(mod), cls).create(cp, options)
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def qualified_name(obj):
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return obj.__module__ + '.' + obj.__class__.__name__
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def has_keyring_support():
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return keyring is not None
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