Current File : //lib/python3/dist-packages/certbot/interfaces.py
"""Certbot client interfaces."""
from abc import ABCMeta
from abc import abstractmethod
from argparse import ArgumentParser
import sys
from types import ModuleType
from typing import cast
from typing import Iterable
from typing import List
from typing import Optional
import warnings
import zope.interface
from acme.challenges import Challenge
from acme.challenges import ChallengeResponse
from certbot.achallenges import AnnotatedChallenge
from certbot import configuration
class AccountStorage(metaclass=ABCMeta):
"""Accounts storage interface."""
@abstractmethod
def find_all(self): # pragma: no cover
"""Find all accounts.
:returns: All found accounts.
:rtype: list
"""
raise NotImplementedError()
@abstractmethod
def load(self, account_id): # pragma: no cover
"""Load an account by its id.
:raises .AccountNotFound: if account could not be found
:raises .AccountStorageError: if account could not be loaded
"""
raise NotImplementedError()
@abstractmethod
def save(self, account, client): # pragma: no cover
"""Save account.
:raises .AccountStorageError: if account could not be saved
"""
raise NotImplementedError()
class IConfig(zope.interface.Interface): # pylint: disable=inherit-non-class
"""Deprecated, use certbot.configuration.NamespaceConfig instead."""
class IPluginFactory(zope.interface.Interface): # pylint: disable=inherit-non-class
"""Deprecated, use certbot.interfaces.Plugin as ABC instead."""
class IPlugin(zope.interface.Interface): # pylint: disable=inherit-non-class
"""Deprecated, use certbot.interfaces.Plugin as ABC instead."""
class Plugin(metaclass=ABCMeta):
"""Certbot plugin.
Objects providing this interface will be called without satisfying
any entry point "extras" (extra dependencies) you might have defined
for your plugin, e.g (excerpt from ``setup.py`` script)::
setup(
...
entry_points={
'certbot.plugins': [
'name=example_project.plugin[plugin_deps]',
],
},
extras_require={
'plugin_deps': ['dep1', 'dep2'],
}
)
Therefore, make sure such objects are importable and usable without
extras. This is necessary, because CLI does the following operations
(in order):
- loads an entry point,
- calls `inject_parser_options`,
- requires an entry point,
- creates plugin instance (`__call__`).
"""
description: str = NotImplemented
"""Short plugin description"""
@abstractmethod
def __init__(self, config: configuration.NamespaceConfig, name: str):
"""Create a new `Plugin`.
:param configuration.NamespaceConfig config: Configuration.
:param str name: Unique plugin name.
"""
super().__init__()
@abstractmethod
def prepare(self) -> None:
"""Prepare the plugin.
Finish up any additional initialization.
:raises .PluginError:
when full initialization cannot be completed.
:raises .MisconfigurationError:
when full initialization cannot be completed. Plugin will
be displayed on a list of available plugins.
:raises .NoInstallationError:
when the necessary programs/files cannot be located. Plugin
will NOT be displayed on a list of available plugins.
:raises .NotSupportedError:
when the installation is recognized, but the version is not
currently supported.
"""
@abstractmethod
def more_info(self) -> str:
"""Human-readable string to help the user.
Should describe the steps taken and any relevant info to help the user
decide which plugin to use.
:rtype str:
"""
@classmethod
@abstractmethod
def inject_parser_options(cls, parser: ArgumentParser, name: str) -> None:
"""Inject argument parser options (flags).
1. Be nice and prepend all options and destinations with
`~.common.option_namespace` and `~common.dest_namespace`.
2. Inject options (flags) only. Positional arguments are not
allowed, as this would break the CLI.
:param ArgumentParser parser: (Almost) top-level CLI parser.
:param str name: Unique plugin name.
"""
class IAuthenticator(IPlugin): # pylint: disable=inherit-non-class
"""Deprecated, use certbot.interfaces.Authenticator as ABC instead."""
class Authenticator(Plugin):
"""Generic Certbot Authenticator.
Class represents all possible tools processes that have the
ability to perform challenges and attain a certificate.
"""
@abstractmethod
def get_chall_pref(self, domain: str) -> Iterable[Challenge]:
"""Return `collections.Iterable` of challenge preferences.
:param str domain: Domain for which challenge preferences are sought.
:returns: `collections.Iterable` of challenge types (subclasses of
:class:`acme.challenges.Challenge`) with the most
preferred challenges first. If a type is not specified, it means the
Authenticator cannot perform the challenge.
:rtype: `collections.Iterable`
"""
@abstractmethod
def perform(self, achalls: List[AnnotatedChallenge]) -> Iterable[ChallengeResponse]:
"""Perform the given challenge.
:param list achalls: Non-empty (guaranteed) list of
:class:`~certbot.achallenges.AnnotatedChallenge`
instances, such that it contains types found within
:func:`get_chall_pref` only.
:returns: `collections.Iterable` of ACME
:class:`~acme.challenges.ChallengeResponse` instances corresponding to each provided
:class:`~acme.challenges.Challenge`.
:rtype: :class:`collections.Iterable` of
:class:`acme.challenges.ChallengeResponse`,
where responses are required to be returned in
the same order as corresponding input challenges
:raises .PluginError: If some or all challenges cannot be performed
"""
@abstractmethod
def cleanup(self, achalls: List[AnnotatedChallenge]) -> None:
"""Revert changes and shutdown after challenges complete.
This method should be able to revert all changes made by
perform, even if perform exited abnormally.
:param list achalls: Non-empty (guaranteed) list of
:class:`~certbot.achallenges.AnnotatedChallenge`
instances, a subset of those previously passed to :func:`perform`.
:raises PluginError: if original configuration cannot be restored
"""
class IInstaller(IPlugin): # pylint: disable=inherit-non-class
"""Deprecated, use certbot.interfaces.Installer as ABC instead."""
class Installer(Plugin):
"""Generic Certbot Installer Interface.
Represents any server that an X509 certificate can be placed.
It is assumed that :func:`save` is the only method that finalizes a
checkpoint. This is important to ensure that checkpoints are
restored in a consistent manner if requested by the user or in case
of an error.
Using :class:`certbot.reverter.Reverter` to implement checkpoints,
rollback, and recovery can dramatically simplify plugin development.
"""
@abstractmethod
def get_all_names(self) -> Iterable[str]:
"""Returns all names that may be authenticated.
:rtype: `collections.Iterable` of `str`
"""
@abstractmethod
def deploy_cert(self, domain: str, cert_path: str, key_path: str,
chain_path: str, fullchain_path: str) -> None:
"""Deploy certificate.
:param str domain: domain to deploy certificate file
:param str cert_path: absolute path to the certificate file
:param str key_path: absolute path to the private key file
:param str chain_path: absolute path to the certificate chain file
:param str fullchain_path: absolute path to the certificate fullchain
file (cert plus chain)
:raises .PluginError: when cert cannot be deployed
"""
@abstractmethod
def enhance(self, domain: str, enhancement: str, options: Optional[List[str]] = None) -> None:
"""Perform a configuration enhancement.
:param str domain: domain for which to provide enhancement
:param str enhancement: An enhancement as defined in
:const:`~certbot.plugins.enhancements.ENHANCEMENTS`
:param options: Flexible options parameter for enhancement.
Check documentation of
:const:`~certbot.plugins.enhancements.ENHANCEMENTS`
for expected options for each enhancement.
:raises .PluginError: If Enhancement is not supported, or if
an error occurs during the enhancement.
"""
@abstractmethod
def supported_enhancements(self) -> List[str]:
"""Returns a `collections.Iterable` of supported enhancements.
:returns: supported enhancements which should be a subset of
:const:`~certbot.plugins.enhancements.ENHANCEMENTS`
:rtype: :class:`collections.Iterable` of :class:`str`
"""
@abstractmethod
def save(self, title: Optional[str] = None, temporary: bool = False) -> None:
"""Saves all changes to the configuration files.
Both title and temporary are needed because a save may be
intended to be permanent, but the save is not ready to be a full
checkpoint.
It is assumed that at most one checkpoint is finalized by this
method. Additionally, if an exception is raised, it is assumed a
new checkpoint was not finalized.
:param str title: The title of the save. If a title is given, the
configuration will be saved as a new checkpoint and put in a
timestamped directory. `title` has no effect if temporary is true.
:param bool temporary: Indicates whether the changes made will
be quickly reversed in the future (challenges)
:raises .PluginError: when save is unsuccessful
"""
@abstractmethod
def rollback_checkpoints(self, rollback: int = 1) -> None:
"""Revert `rollback` number of configuration checkpoints.
:raises .PluginError: when configuration cannot be fully reverted
"""
@abstractmethod
def recovery_routine(self) -> None:
"""Revert configuration to most recent finalized checkpoint.
Remove all changes (temporary and permanent) that have not been
finalized. This is useful to protect against crashes and other
execution interruptions.
:raises .errors.PluginError: If unable to recover the configuration
"""
@abstractmethod
def config_test(self) -> None:
"""Make sure the configuration is valid.
:raises .MisconfigurationError: when the config is not in a usable state
"""
@abstractmethod
def restart(self) -> None:
"""Restart or refresh the server content.
:raises .PluginError: when server cannot be restarted
"""
class IDisplay(zope.interface.Interface): # pylint: disable=inherit-non-class
"""Deprecated, use your own Display implementation instead."""
class IReporter(zope.interface.Interface): # pylint: disable=inherit-non-class
"""Deprecated, use your own Reporter implementation instead."""
class RenewableCert(metaclass=ABCMeta):
"""Interface to a certificate lineage."""
@property
@abstractmethod
def cert_path(self):
"""Path to the certificate file.
:rtype: str
"""
@property
@abstractmethod
def key_path(self):
"""Path to the private key file.
:rtype: str
"""
@property
@abstractmethod
def chain_path(self):
"""Path to the certificate chain file.
:rtype: str
"""
@property
@abstractmethod
def fullchain_path(self):
"""Path to the full chain file.
The full chain is the certificate file plus the chain file.
:rtype: str
"""
@property
@abstractmethod
def lineagename(self):
"""Name given to the certificate lineage.
:rtype: str
"""
@abstractmethod
def names(self):
"""What are the subject names of this certificate?
:returns: the subject names
:rtype: `list` of `str`
:raises .CertStorageError: if could not find cert file.
"""
# Updater interfaces
#
# When "certbot renew" is run, Certbot will iterate over each lineage and check
# if the selected installer for that lineage is a subclass of each updater
# class. If it is and the update of that type is configured to be run for that
# lineage, the relevant update function will be called for it. These functions
# are never called for other subcommands, so if an installer wants to perform
# an update during the run or install subcommand, it should do so when
# :func:`IInstaller.deploy_cert` is called.
class GenericUpdater(metaclass=ABCMeta):
"""Interface for update types not currently specified by Certbot.
This class allows plugins to perform types of updates that Certbot hasn't
defined (yet).
To make use of this interface, the installer should implement the interface
methods, and interfaces.GenericUpdater.register(InstallerClass) should
be called from the installer code.
The plugins implementing this enhancement are responsible of handling
the saving of configuration checkpoints as well as other calls to
interface methods of `interfaces.Installer` such as prepare() and restart()
"""
@abstractmethod
def generic_updates(self, lineage, *args, **kwargs):
"""Perform any update types defined by the installer.
If an installer is a subclass of the class containing this method, this
function will always be called when "certbot renew" is run. If the
update defined by the installer should be run conditionally, the
installer needs to handle checking the conditions itself.
This method is called once for each lineage.
:param lineage: Certificate lineage object
:type lineage: RenewableCert
"""
class RenewDeployer(metaclass=ABCMeta):
"""Interface for update types run when a lineage is renewed
This class allows plugins to perform types of updates that need to run at
lineage renewal that Certbot hasn't defined (yet).
To make use of this interface, the installer should implement the interface
methods, and interfaces.RenewDeployer.register(InstallerClass) should
be called from the installer code.
"""
@abstractmethod
def renew_deploy(self, lineage, *args, **kwargs):
"""Perform updates defined by installer when a certificate has been renewed
If an installer is a subclass of the class containing this method, this
function will always be called when a certificate has been renewed by
running "certbot renew". For example if a plugin needs to copy a
certificate over, or change configuration based on the new certificate.
This method is called once for each lineage renewed
:param lineage: Certificate lineage object
:type lineage: RenewableCert
"""
# This class takes a similar approach to the cryptography project to deprecate attributes
# in public modules. See the _ModuleWithDeprecation class here:
# https://github.com/pyca/cryptography/blob/91105952739442a74582d3e62b3d2111365b0dc7/src/cryptography/utils.py#L129
class _ZopeInterfacesDeprecationModule:
"""
Internal class delegating to a module, and displaying warnings when
attributes related to Zope interfaces are accessed.
"""
def __init__(self, module):
self.__dict__['_module'] = module
def __getattr__(self, attr):
if attr in ('IConfig', 'IPlugin', 'IPluginFactory', 'IAuthenticator',
'IInstaller', 'IDisplay', 'IReporter'):
warnings.warn('{0} attribute in certbot.interfaces module is deprecated '
'and will be removed soon.'.format(attr),
DeprecationWarning, stacklevel=2)
return getattr(self._module, attr)
def __setattr__(self, attr, value): # pragma: no cover
setattr(self._module, attr, value)
def __delattr__(self, attr): # pragma: no cover
delattr(self._module, attr)
def __dir__(self): # pragma: no cover
return ['_module'] + dir(self._module)
# Patching ourselves to warn about Zope interfaces deprecation and planned removal.
sys.modules[__name__] = cast(ModuleType, _ZopeInterfacesDeprecationModule(sys.modules[__name__]))
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