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| Current File : //usr/lib/python3/dist-packages/keyring/core.py |
"""
Core API functions and initialization routines.
"""
import os
import sys
import logging
import operator
from .py27compat import configparser, filter
from .py33compat import max
from . import backend
from .util import platform_ as platform
from .backends import fail
log = logging.getLogger(__name__)
_keyring_backend = None
def set_keyring(keyring):
"""Set current keyring backend.
"""
global _keyring_backend
if not isinstance(keyring, backend.KeyringBackend):
raise TypeError("The keyring must be a subclass of KeyringBackend")
_keyring_backend = keyring
def get_keyring():
"""Get current keyring backend.
"""
return _keyring_backend
def get_password(service_name, username):
"""Get password from the specified service.
"""
return _keyring_backend.get_password(service_name, username)
def set_password(service_name, username, password):
"""Set password for the user in the specified service.
"""
_keyring_backend.set_password(service_name, username, password)
def delete_password(service_name, username):
"""Delete the password for the user in the specified service.
"""
_keyring_backend.delete_password(service_name, username)
def recommended(backend): return backend.priority >= 1
by_priority = operator.attrgetter('priority')
def init_backend(limit=None):
"""
Load a keyring specified in the config file or infer the best available.
"""
keyrings = filter(limit, backend.get_all_keyring())
set_keyring(
load_config()
or max(keyrings, default=fail.Keyring, key=by_priority)
)
def _load_keyring_class(keyring_name):
"""
Load the keyring class indicated by name.
These popular names are tested to ensure their presence.
>>> popular_names = [
... 'keyring.backends.Windows.WinVaultKeyring',
... 'keyring.backends.OS_X.Keyring',
... 'keyring.backends.kwallet.DBusKeyring',
... 'keyring.backends.SecretService.Keyring',
... ]
>>> list(map(_load_keyring_class, popular_names))
[...]
These legacy names are retained for compatibility.
>>> legacy_names = [
... ]
>>> list(map(_load_keyring_class, legacy_names))
[...]
"""
module_name, sep, class_name = keyring_name.rpartition('.')
__import__(module_name)
module = sys.modules[module_name]
return getattr(module, class_name)
def load_keyring(keyring_name):
"""
Load the specified keyring by name (a fully-qualified name to the
keyring, such as 'keyring.backends.file.PlaintextKeyring')
"""
class_ = _load_keyring_class(keyring_name)
# invoke the priority to ensure it is viable, or raise a RuntimeError
class_.priority
return class_()
def load_config():
"""Load a keyring using the config file in the config root."""
filename = 'keyringrc.cfg'
keyring_cfg = os.path.join(platform.config_root(), filename)
if not os.path.exists(keyring_cfg):
return
config = configparser.RawConfigParser()
config.read(keyring_cfg)
_load_keyring_path(config)
# load the keyring class name, and then load this keyring
try:
if config.has_section("backend"):
keyring_name = config.get("backend", "default-keyring").strip()
else:
raise configparser.NoOptionError('backend', 'default-keyring')
except (configparser.NoOptionError, ImportError):
logger = logging.getLogger('keyring')
logger.warning("Keyring config file contains incorrect values.\n" +
"Config file: %s" % keyring_cfg)
return
return load_keyring(keyring_name)
def _load_keyring_path(config):
"load the keyring-path option (if present)"
try:
path = config.get("backend", "keyring-path").strip()
sys.path.insert(0, path)
except (configparser.NoOptionError, configparser.NoSectionError):
pass
# init the _keyring_backend
init_backend()
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