mirror of
https://github.com/openSUSE/osc.git
synced 2024-11-10 06:46:15 +01:00
338 lines
11 KiB
Python
338 lines
11 KiB
Python
import base64
|
|
import bz2
|
|
import getpass
|
|
import importlib
|
|
import sys
|
|
from urllib.parse import urlsplit
|
|
|
|
try:
|
|
import keyring
|
|
except ImportError:
|
|
keyring = None
|
|
except BaseException as e:
|
|
# catch and report any exceptions raised in the 'keyring' module
|
|
msg = "Warning: Unable to load the 'keyring' module due to an internal error:"
|
|
print(msg, e, file=sys.stderr)
|
|
keyring = None
|
|
|
|
from . import conf
|
|
from . import oscerr
|
|
|
|
|
|
class AbstractCredentialsManagerDescriptor:
|
|
def name(self):
|
|
raise NotImplementedError()
|
|
|
|
def description(self):
|
|
raise NotImplementedError()
|
|
|
|
def priority(self):
|
|
# priority determines order in the credentials managers list
|
|
# higher number means higher priority
|
|
raise NotImplementedError()
|
|
|
|
def create(self, cp):
|
|
raise NotImplementedError()
|
|
|
|
def __lt__(self, other):
|
|
return (-self.priority(), self.name()) < (-other.priority(), other.name())
|
|
|
|
|
|
class AbstractCredentialsManager:
|
|
config_entry = 'credentials_mgr_class'
|
|
|
|
def __init__(self, cp, options):
|
|
super().__init__()
|
|
self._cp = cp
|
|
self._process_options(options)
|
|
|
|
@classmethod
|
|
def create(cls, cp, options):
|
|
return cls(cp, options)
|
|
|
|
def _get_password(self, url, user, apiurl=None):
|
|
raise NotImplementedError()
|
|
|
|
def get_password(self, url, user, defer=True, apiurl=None):
|
|
if defer:
|
|
return conf.Password(lambda: self._get_password(url, user, apiurl=apiurl))
|
|
else:
|
|
return conf.Password(self._get_password(url, user, apiurl=apiurl))
|
|
|
|
def set_password(self, url, user, password):
|
|
raise NotImplementedError()
|
|
|
|
def delete_password(self, url, user):
|
|
raise NotImplementedError()
|
|
|
|
def _qualified_name(self):
|
|
return qualified_name(self)
|
|
|
|
def _process_options(self, options):
|
|
pass
|
|
|
|
|
|
class PlaintextConfigFileCredentialsManager(AbstractCredentialsManager):
|
|
def get_password(self, url, user, defer=True, apiurl=None):
|
|
password = self._cp.get(url, "pass", fallback=None, raw=True)
|
|
if password is None:
|
|
return None
|
|
return conf.Password(password)
|
|
|
|
def set_password(self, url, user, password):
|
|
self._cp.set(url, 'pass', password)
|
|
self._cp.set(url, self.config_entry, self._qualified_name())
|
|
|
|
def delete_password(self, url, user):
|
|
self._cp.remove_option(url, 'pass')
|
|
|
|
def _process_options(self, options):
|
|
if options is not None:
|
|
raise RuntimeError('options must be None')
|
|
|
|
|
|
class PlaintextConfigFileDescriptor(AbstractCredentialsManagerDescriptor):
|
|
def name(self):
|
|
return 'Config'
|
|
|
|
def description(self):
|
|
return 'Store the password in plain text in the osc config file [insecure, persistent]'
|
|
|
|
def priority(self):
|
|
return 1
|
|
|
|
def create(self, cp):
|
|
return PlaintextConfigFileCredentialsManager(cp, None)
|
|
|
|
|
|
class ObfuscatedConfigFileCredentialsManager(PlaintextConfigFileCredentialsManager):
|
|
def get_password(self, url, user, defer=True, apiurl=None):
|
|
if self._cp.has_option(url, 'passx', proper=True):
|
|
passwd = self._cp.get(url, 'passx', raw=True)
|
|
else:
|
|
passwd = super().get_password(url, user, apiurl=apiurl)
|
|
password = self.decode_password(passwd)
|
|
return conf.Password(password)
|
|
|
|
def set_password(self, url, user, password):
|
|
compressed_pw = bz2.compress(password.encode('ascii'))
|
|
password = base64.b64encode(compressed_pw).decode("ascii")
|
|
super().set_password(url, user, password)
|
|
|
|
def delete_password(self, url, user):
|
|
self._cp.remove_option(url, 'passx')
|
|
super().delete_password(url, user)
|
|
|
|
@classmethod
|
|
def decode_password(cls, password):
|
|
if password is None:
|
|
# avoid crash on encoding None when 'pass' is not specified in the config
|
|
return None
|
|
compressed_pw = base64.b64decode(password.encode("ascii"))
|
|
return bz2.decompress(compressed_pw).decode("ascii")
|
|
|
|
|
|
class ObfuscatedConfigFileDescriptor(AbstractCredentialsManagerDescriptor):
|
|
def name(self):
|
|
return 'Obfuscated config'
|
|
|
|
def description(self):
|
|
return 'Store the password in obfuscated form in the osc config file [insecure, persistent]'
|
|
|
|
def priority(self):
|
|
return 2
|
|
|
|
def create(self, cp):
|
|
return ObfuscatedConfigFileCredentialsManager(cp, None)
|
|
|
|
|
|
class TransientCredentialsManager(AbstractCredentialsManager):
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
self._password = None
|
|
|
|
def _process_options(self, options):
|
|
if options is not None:
|
|
raise RuntimeError('options must be None')
|
|
|
|
def _get_password(self, url, user, apiurl=None):
|
|
if self._password is None:
|
|
if apiurl:
|
|
# strip scheme from apiurl because we don't want to display it to the user
|
|
apiurl_no_scheme = urlsplit(apiurl)[1]
|
|
msg = f'Password [{user}@{apiurl_no_scheme}]: '
|
|
else:
|
|
msg = 'Password: '
|
|
self._password = getpass.getpass(msg)
|
|
return self._password
|
|
|
|
def set_password(self, url, user, password):
|
|
self._password = password
|
|
self._cp.set(url, self.config_entry, self._qualified_name())
|
|
|
|
def delete_password(self, url, user):
|
|
self._password = None
|
|
|
|
|
|
class TransientDescriptor(AbstractCredentialsManagerDescriptor):
|
|
def name(self):
|
|
return 'Transient'
|
|
|
|
def description(self):
|
|
return 'Do not store the password and always ask for it [secure, in-memory]'
|
|
|
|
def priority(self):
|
|
return 3
|
|
|
|
def create(self, cp):
|
|
return TransientCredentialsManager(cp, None)
|
|
|
|
|
|
class KeyringCredentialsManager(AbstractCredentialsManager):
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
self._password = None
|
|
|
|
def _process_options(self, options):
|
|
if options is None:
|
|
raise RuntimeError('options may not be None')
|
|
self._backend_cls_name = options
|
|
|
|
def _load_backend(self):
|
|
try:
|
|
keyring_backend = keyring.core.load_keyring(self._backend_cls_name)
|
|
except ModuleNotFoundError:
|
|
msg = f"Invalid credentials_mgr_class: {self._backend_cls_name}"
|
|
raise oscerr.ConfigError(msg, conf.config['conffile'])
|
|
keyring.set_keyring(keyring_backend)
|
|
|
|
@classmethod
|
|
def create(cls, cp, options):
|
|
if not has_keyring_support():
|
|
return None
|
|
return super().create(cp, options)
|
|
|
|
def _get_password(self, url, user, apiurl=None):
|
|
if self._password is None:
|
|
self._load_backend()
|
|
self._password = keyring.get_password(urlsplit(url)[1], user)
|
|
# TODO: this works fine on the command-line but a long-running process using osc library would start failing after changing the password in the keyring
|
|
# TODO: implement retrieving the password again after basic auth fails; sufficiently inform user about what's being done
|
|
return self._password
|
|
|
|
def set_password(self, url, user, password):
|
|
self._load_backend()
|
|
keyring.set_password(urlsplit(url)[1], user, password)
|
|
config_value = f"{self._qualified_name()}:{self._backend_cls_name}"
|
|
self._cp.set(url, self.config_entry, config_value)
|
|
self._password = password
|
|
|
|
def delete_password(self, url, user):
|
|
self._load_backend()
|
|
service = urlsplit(url)[1]
|
|
data = keyring.get_password(service, user)
|
|
if data is None:
|
|
return
|
|
keyring.delete_password(service, user)
|
|
|
|
|
|
class KeyringCredentialsDescriptor(AbstractCredentialsManagerDescriptor):
|
|
def __init__(self, keyring_backend, name=None, description=None, priority=None):
|
|
self._keyring_backend = keyring_backend
|
|
self._name = name
|
|
self._description = description
|
|
self._priority = priority
|
|
|
|
def name(self):
|
|
if self._name:
|
|
return self._name
|
|
if hasattr(self._keyring_backend, 'name'):
|
|
return self._keyring_backend.name
|
|
return self._keyring_backend.__class__.__name__
|
|
|
|
def description(self):
|
|
if self._description:
|
|
return self._description
|
|
return 'Backend provided by python-keyring'
|
|
|
|
def priority(self):
|
|
if self._priority is not None:
|
|
return self._priority
|
|
return 0
|
|
|
|
def create(self, cp):
|
|
qualified_backend_name = qualified_name(self._keyring_backend)
|
|
return KeyringCredentialsManager(cp, qualified_backend_name)
|
|
|
|
|
|
# we're supporting only selected python-keyring backends in osc
|
|
SUPPORTED_KEYRING_BACKENDS = {
|
|
"keyutils.osc.OscKernelKeyringBackend": {
|
|
"name": "Kernel keyring",
|
|
"description": "Store password in user session keyring in kernel keyring [secure, in-memory, per-session]",
|
|
"priority": 10,
|
|
},
|
|
"keyring.backends.SecretService.Keyring": {
|
|
"name": "Secret Service",
|
|
"description": "Store password in Secret Service (GNOME Keyring backend) [secure, persistent]",
|
|
"priority": 9,
|
|
},
|
|
"keyring.backends.kwallet.DBusKeyring": {
|
|
"name": "KWallet",
|
|
"description": "Store password in KWallet [secure, persistent]",
|
|
"priority": 8,
|
|
},
|
|
}
|
|
|
|
|
|
def get_credentials_manager_descriptors():
|
|
descriptors = []
|
|
|
|
if has_keyring_support():
|
|
for backend in keyring.backend.get_all_keyring():
|
|
qualified_backend_name = qualified_name(backend)
|
|
data = SUPPORTED_KEYRING_BACKENDS.get(qualified_backend_name, None)
|
|
if not data:
|
|
continue
|
|
descriptor = KeyringCredentialsDescriptor(
|
|
backend,
|
|
data["name"],
|
|
data["description"],
|
|
data["priority"]
|
|
)
|
|
descriptors.append(descriptor)
|
|
descriptors.append(PlaintextConfigFileDescriptor())
|
|
descriptors.append(ObfuscatedConfigFileDescriptor())
|
|
descriptors.append(TransientDescriptor())
|
|
descriptors.sort()
|
|
return descriptors
|
|
|
|
|
|
def get_keyring_credentials_manager(cp):
|
|
keyring_backend = keyring.get_keyring()
|
|
return KeyringCredentialsManager(cp, qualified_name(keyring_backend))
|
|
|
|
|
|
def create_credentials_manager(url, cp):
|
|
config_entry = cp.get(url, AbstractCredentialsManager.config_entry)
|
|
if ':' in config_entry:
|
|
creds_mgr_cls, options = config_entry.split(':', 1)
|
|
else:
|
|
creds_mgr_cls = config_entry
|
|
options = None
|
|
mod, cls = creds_mgr_cls.rsplit('.', 1)
|
|
try:
|
|
creds_mgr = getattr(importlib.import_module(mod), cls).create(cp, options)
|
|
except ModuleNotFoundError:
|
|
msg = f"Invalid credentials_mgr_class: {creds_mgr_cls}"
|
|
raise oscerr.ConfigError(msg, conf.config['conffile'])
|
|
return creds_mgr
|
|
|
|
|
|
def qualified_name(obj):
|
|
return f"{obj.__module__}.{obj.__class__.__name__}"
|
|
|
|
|
|
def has_keyring_support():
|
|
return keyring is not None
|