Move backend's components to its own file.

1 files changed, 15 insertions, 1134 deletions

diff --git a/src/leap/bitmask/backend/leapbackend.py b/src/leap/bitmask/backend/leapbackend.py
index c82d1d34..3c5222f4 100644
--- a/src/leap/bitmask/backend/leapbackend.py
+++ b/src/leap/bitmask/backend/leapbackend.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# backend.py
+# leapbackend.py
 # Copyright (C) 2013 LEAP
 #
 # This program is free software: you can redistribute it and/or modify
@@ -15,1144 +15,25 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
-Backend for everything
+Backend for GUI/Logic communication.
 """
 import logging
-import os
-import socket
-import time
 
-from functools import partial
 from Queue import Queue, Empty
-from threading import Condition
 
 from twisted.internet import reactor
 from twisted.internet import threads, defer
 from twisted.internet.task import LoopingCall
-from twisted.python import log
 
 import zope.interface
 import zope.proxy
 
 from leap.bitmask.backend.leapsignaler import Signaler
-
-from leap.bitmask.config.providerconfig import ProviderConfig
-from leap.bitmask.crypto.srpauth import SRPAuth
-from leap.bitmask.crypto.srpregister import SRPRegister
-from leap.bitmask.platform_init import IS_LINUX
-from leap.bitmask.provider.providerbootstrapper import ProviderBootstrapper
-from leap.bitmask.provider.pinned import PinnedProviders
-from leap.bitmask.services import get_supported
-from leap.bitmask.services.eip import eipconfig
-from leap.bitmask.services.eip import get_openvpn_management
-from leap.bitmask.services.eip.eipbootstrapper import EIPBootstrapper
-
-from leap.bitmask.services.eip import vpnlauncher, vpnprocess
-from leap.bitmask.services.eip import linuxvpnlauncher, darwinvpnlauncher
-from leap.bitmask.services.eip import get_vpn_launcher
-
-from leap.bitmask.services.mail.imapcontroller import IMAPController
-from leap.bitmask.services.mail.smtpbootstrapper import SMTPBootstrapper
-from leap.bitmask.services.mail.smtpconfig import SMTPConfig
-
-from leap.bitmask.services.soledad.soledadbootstrapper import \
-    SoledadBootstrapper
-from leap.bitmask.util import force_eval
-
-from leap.common import certs as leap_certs
-
-from leap.keymanager import openpgp
-from leap.keymanager.errors import KeyAddressMismatch, KeyFingerprintMismatch
-
-from leap.soledad.client import NoStorageSecret, PassphraseTooShort
+from leap.bitmask.backend import components
 
 logger = logging.getLogger(__name__)
 
 
-class ILEAPComponent(zope.interface.Interface):
-    """
-    Interface that every component for the backend should comply to
-    """
-
-    key = zope.interface.Attribute("Key id for this component")
-
-
-class ILEAPService(ILEAPComponent):
-    """
-    Interface that every Service needs to implement
-    """
-
-    def start(self, *args, **kwargs):
-        """
-        Start the service.
-        """
-        pass
-
-    def stop(self, *args, **kwargs):
-        """
-        Stops the service.
-        """
-        pass
-
-    def terminate(self):
-        """
-        Terminate the service, not necessarily in a nice way.
-        """
-        pass
-
-    def status(self):
-        """
-        Return a json object with the current status for the service.
-
-        :rtype: object (list, str, dict)
-        """
-        # XXX: Use a namedtuple or a specific object instead of a json
-        # object, since parsing it will be problematic otherwise.
-        # It has to be something easily serializable though.
-        pass
-
-    def set_configs(self, keyval):
-        """
-        Set the config parameters for this Service.
-
-        :param keyval: values to configure
-        :type keyval: dict, {str: str}
-        """
-        pass
-
-    def get_configs(self, keys):
-        """
-        Return the configuration values for the list of keys.
-
-        :param keys: keys to retrieve
-        :type keys: list of str
-
-        :rtype: dict, {str: str}
-        """
-        pass
-
-
-class Provider(object):
-    """
-    Interfaces with setup and bootstrapping operations for a provider
-    """
-
-    zope.interface.implements(ILEAPComponent)
-
-    def __init__(self, signaler=None, bypass_checks=False):
-        """
-        Constructor for the Provider component
-
-        :param signaler: Object in charge of handling communication
-                         back to the frontend
-        :type signaler: Signaler
-        :param bypass_checks: Set to true if the app should bypass
-                              first round of checks for CA
-                              certificates at bootstrap
-        :type bypass_checks: bool
-        """
-        self.key = "provider"
-        self._signaler = signaler
-        self._provider_bootstrapper = ProviderBootstrapper(signaler,
-                                                           bypass_checks)
-        self._download_provider_defer = None
-        self._provider_config = ProviderConfig()
-
-    def setup_provider(self, provider):
-        """
-        Initiate the setup for a provider
-
-        :param provider: URL for the provider
-        :type provider: unicode
-
-        :returns: the defer for the operation running in a thread.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        log.msg("Setting up provider %s..." % (provider.encode("idna"),))
-        pb = self._provider_bootstrapper
-        d = pb.run_provider_select_checks(provider, download_if_needed=True)
-        self._download_provider_defer = d
-        return d
-
-    def cancel_setup_provider(self):
-        """
-        Cancel the ongoing setup provider defer (if any).
-        """
-        d = self._download_provider_defer
-        if d is not None:
-            d.cancel()
-
-    def bootstrap(self, provider):
-        """
-        Second stage of bootstrapping for a provider.
-
-        :param provider: URL for the provider
-        :type provider: unicode
-
-        :returns: the defer for the operation running in a thread.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        d = None
-
-        config = ProviderConfig.get_provider_config(provider)
-        self._provider_config = config
-        if config is not None:
-            d = self._provider_bootstrapper.run_provider_setup_checks(
-                config, download_if_needed=True)
-        else:
-            if self._signaler is not None:
-                self._signaler.signal(
-                    self._signaler.PROV_PROBLEM_WITH_PROVIDER_KEY)
-            logger.error("Could not load provider configuration.")
-            self._login_widget.set_enabled(True)
-
-        if d is None:
-            d = defer.Deferred()
-        return d
-
-    def _get_services(self, domain):
-        """
-        Returns a list of services provided by the given provider.
-
-        :param domain: the provider to get the services from.
-        :type domain: str
-
-        :rtype: list of str
-        """
-        services = []
-        provider_config = ProviderConfig.get_provider_config(domain)
-        if provider_config is not None:
-            services = provider_config.get_services()
-
-        return services
-
-    def get_supported_services(self, domain):
-        """
-        Signal a list of supported services provided by the given provider.
-
-        :param domain: the provider to get the services from.
-        :type domain: str
-
-        Signals:
-            prov_get_supported_services -> list of unicode
-        """
-        services = get_supported(self._get_services(domain))
-
-        self._signaler.signal(
-            self._signaler.PROV_GET_SUPPORTED_SERVICES, services)
-
-    def get_all_services(self, providers):
-        """
-        Signal a list of services provided by all the configured providers.
-
-        :param providers: the list of providers to get the services.
-        :type providers: list
-
-        Signals:
-            prov_get_all_services -> list of unicode
-        """
-        services_all = set()
-
-        for domain in providers:
-            services = self._get_services(domain)
-            services_all = services_all.union(set(services))
-
-        self._signaler.signal(
-            self._signaler.PROV_GET_ALL_SERVICES, services_all)
-
-    def get_details(self, domain, lang=None):
-        """
-        Signal a ProviderConfigLight object with the current ProviderConfig
-        settings.
-
-        :param domain: the domain name of the provider.
-        :type domain: str
-        :param lang: the language to use for localized strings.
-        :type lang: str
-
-        Signals:
-            prov_get_details -> ProviderConfigLight
-        """
-        self._signaler.signal(
-            self._signaler.PROV_GET_DETAILS,
-            self._provider_config.get_light_config(domain, lang))
-
-    def get_pinned_providers(self):
-        """
-        Signal the list of pinned provider domains.
-
-        Signals:
-            prov_get_pinned_providers -> list of provider domains
-        """
-        self._signaler.signal(
-            self._signaler.PROV_GET_PINNED_PROVIDERS,
-            PinnedProviders.domains())
-
-
-class Register(object):
-    """
-    Interfaces with setup and bootstrapping operations for a provider
-    """
-
-    zope.interface.implements(ILEAPComponent)
-
-    def __init__(self, signaler=None):
-        """
-        Constructor for the Register component
-
-        :param signaler: Object in charge of handling communication
-                         back to the frontend
-        :type signaler: Signaler
-        """
-        self.key = "register"
-        self._signaler = signaler
-
-    def register_user(self, domain, username, password):
-        """
-        Register a user using the domain and password given as parameters.
-
-        :param domain: the domain we need to register the user.
-        :type domain: unicode
-        :param username: the user name
-        :type username: unicode
-        :param password: the password for the username
-        :type password: unicode
-
-        :returns: the defer for the operation running in a thread.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        config = ProviderConfig.get_provider_config(domain)
-        self._provider_config = config
-        if config is not None:
-            srpregister = SRPRegister(signaler=self._signaler,
-                                      provider_config=config)
-            return threads.deferToThread(
-                partial(srpregister.register_user, username, password))
-        else:
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.SRP_REGISTRATION_FAILED)
-            logger.error("Could not load provider configuration.")
-
-
-class EIP(object):
-    """
-    Interfaces with setup and launch of EIP
-    """
-
-    zope.interface.implements(ILEAPService)
-
-    def __init__(self, signaler=None):
-        """
-        Constructor for the EIP component
-
-        :param signaler: Object in charge of handling communication
-                         back to the frontend
-        :type signaler: Signaler
-        """
-        self.key = "eip"
-        self._signaler = signaler
-        self._eip_bootstrapper = EIPBootstrapper(signaler)
-        self._eip_setup_defer = None
-        self._provider_config = ProviderConfig()
-
-        self._vpn = vpnprocess.VPN(signaler=signaler)
-
-    def setup_eip(self, domain, skip_network=False):
-        """
-        Initiate the setup for a provider
-
-        :param domain: URL for the provider
-        :type domain: unicode
-        :param skip_network: Whether checks that involve network should be done
-                             or not
-        :type skip_network: bool
-
-        :returns: the defer for the operation running in a thread.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        config = ProviderConfig.get_provider_config(domain)
-        self._provider_config = config
-        if config is not None:
-            if skip_network:
-                return defer.Deferred()
-            eb = self._eip_bootstrapper
-            d = eb.run_eip_setup_checks(self._provider_config,
-                                        download_if_needed=True)
-            self._eip_setup_defer = d
-            return d
-        else:
-            raise Exception("No provider setup loaded")
-
-    def cancel_setup_eip(self):
-        """
-        Cancel the ongoing setup eip defer (if any).
-        """
-        d = self._eip_setup_defer
-        if d is not None:
-            d.cancel()
-
-    def _start_eip(self, restart=False):
-        """
-        Start EIP
-
-        :param restart: whether is is a restart.
-        :type restart: bool
-        """
-        provider_config = self._provider_config
-        eip_config = eipconfig.EIPConfig()
-        domain = provider_config.get_domain()
-
-        loaded = eipconfig.load_eipconfig_if_needed(
-            provider_config, eip_config, domain)
-
-        if not self._can_start(domain):
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.EIP_CONNECTION_ABORTED)
-            return
-
-        if not loaded:
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.EIP_CONNECTION_ABORTED)
-            logger.error("Tried to start EIP but cannot find any "
-                         "available provider!")
-            return
-
-        host, port = get_openvpn_management()
-        self._vpn.start(eipconfig=eip_config,
-                        providerconfig=provider_config,
-                        socket_host=host, socket_port=port,
-                        restart=restart)
-
-    def start(self, *args, **kwargs):
-        """
-        Start the service.
-        """
-        signaler = self._signaler
-
-        if not self._provider_config.loaded():
-            # This means that the user didn't call setup_eip first.
-            self._signaler.signal(signaler.BACKEND_BAD_CALL, "EIP.start(), "
-                                  "no provider loaded")
-            return
-
-        try:
-            self._start_eip(*args, **kwargs)
-        except vpnprocess.OpenVPNAlreadyRunning:
-            signaler.signal(signaler.EIP_OPENVPN_ALREADY_RUNNING)
-        except vpnprocess.AlienOpenVPNAlreadyRunning:
-            signaler.signal(signaler.EIP_ALIEN_OPENVPN_ALREADY_RUNNING)
-        except vpnlauncher.OpenVPNNotFoundException:
-            signaler.signal(signaler.EIP_OPENVPN_NOT_FOUND_ERROR)
-        except vpnlauncher.VPNLauncherException:
-            # TODO: this seems to be used for 'gateway not found' only.
-            #       see vpnlauncher.py
-            signaler.signal(signaler.EIP_VPN_LAUNCHER_EXCEPTION)
-        except linuxvpnlauncher.EIPNoPolkitAuthAgentAvailable:
-            signaler.signal(signaler.EIP_NO_POLKIT_AGENT_ERROR)
-        except linuxvpnlauncher.EIPNoPkexecAvailable:
-            signaler.signal(signaler.EIP_NO_PKEXEC_ERROR)
-        except darwinvpnlauncher.EIPNoTunKextLoaded:
-            signaler.signal(signaler.EIP_NO_TUN_KEXT_ERROR)
-        except Exception as e:
-            logger.error("Unexpected problem: {0!r}".format(e))
-        else:
-            logger.debug('EIP: no errors')
-
-    def _do_stop(self, shutdown=False, restart=False):
-        """
-        Stop the service. This is run in a thread to avoid blocking.
-        """
-        self._vpn.terminate(shutdown, restart)
-        if IS_LINUX:
-            self._wait_for_firewall_down()
-
-    def stop(self, shutdown=False, restart=False):
-        """
-        Stop the service.
-        """
-        return threads.deferToThread(self._do_stop, shutdown, restart)
-
-    def _wait_for_firewall_down(self):
-        """
-        Wait for the firewall to come down.
-        """
-        # Due to how we delay the resolvconf action in linux.
-        # XXX this *has* to wait for a reasonable lapse, since we have some
-        # delay in vpn.terminate.
-        # For a better solution it should be signaled from backend that
-        # everything is clear to proceed, or a timeout happened.
-        MAX_FW_WAIT_RETRIES = 25
-        FW_WAIT_STEP = 0.5
-
-        retry = 1
-
-        while retry <= MAX_FW_WAIT_RETRIES:
-            if self._vpn.is_fw_down():
-                self._signaler.signal(self._signaler.EIP_STOPPED)
-                return
-            else:
-                #msg = "Firewall is not down yet, waiting... {0} of {1}"
-                #msg = msg.format(retry, MAX_FW_WAIT_RETRIES)
-                #logger.debug(msg)
-                time.sleep(FW_WAIT_STEP)
-                retry += 1
-        logger.warning("After waiting, firewall is not down... "
-                       "You might experience lack of connectivity")
-
-    def terminate(self):
-        """
-        Terminate the service, not necessarily in a nice way.
-        """
-        self._vpn.killit()
-
-    def status(self):
-        """
-        Return a json object with the current status for the service.
-
-        :rtype: object (list, str, dict)
-        """
-        # XXX: Use a namedtuple or a specific object instead of a json
-        # object, since parsing it will be problematic otherwise.
-        # It has to be something easily serializable though.
-        pass
-
-    def _provider_is_initialized(self, domain):
-        """
-        Return whether the given domain is initialized or not.
-
-        :param domain: the domain to check
-        :type domain: str
-
-        :returns: True if is initialized, False otherwise.
-        :rtype: bool
-        """
-        eipconfig_path = eipconfig.get_eipconfig_path(domain, relative=False)
-        if os.path.isfile(eipconfig_path):
-            return True
-        else:
-            return False
-
-    def get_initialized_providers(self, domains):
-        """
-        Signal a list of the given domains and if they are initialized or not.
-
-        :param domains: the list of domains to check.
-        :type domain: list of str
-
-        Signals:
-            eip_get_initialized_providers -> list of tuple(unicode, bool)
-        """
-        filtered_domains = []
-        for domain in domains:
-            is_initialized = self._provider_is_initialized(domain)
-            filtered_domains.append((domain, is_initialized))
-
-        if self._signaler is not None:
-            self._signaler.signal(self._signaler.EIP_GET_INITIALIZED_PROVIDERS,
-                                  filtered_domains)
-
-    def tear_fw_down(self):
-        """
-        Tear the firewall down.
-        """
-        self._vpn.tear_down_firewall()
-
-    def get_gateways_list(self, domain):
-        """
-        Signal a list of gateways for the given provider.
-
-        :param domain: the domain to get the gateways.
-        :type domain: str
-
-        Signals:
-            eip_get_gateways_list -> list of unicode
-            eip_get_gateways_list_error
-            eip_uninitialized_provider
-        """
-        if not self._provider_is_initialized(domain):
-            if self._signaler is not None:
-                self._signaler.signal(
-                    self._signaler.EIP_UNINITIALIZED_PROVIDER)
-            return
-
-        eip_config = eipconfig.EIPConfig()
-        provider_config = ProviderConfig.get_provider_config(domain)
-
-        api_version = provider_config.get_api_version()
-        eip_config.set_api_version(api_version)
-        eip_loaded = eip_config.load(eipconfig.get_eipconfig_path(domain))
-
-        # check for other problems
-        if not eip_loaded or provider_config is None:
-            if self._signaler is not None:
-                self._signaler.signal(
-                    self._signaler.EIP_GET_GATEWAYS_LIST_ERROR)
-            return
-
-        gateways = eipconfig.VPNGatewaySelector(eip_config).get_gateways_list()
-
-        if self._signaler is not None:
-            self._signaler.signal(
-                self._signaler.EIP_GET_GATEWAYS_LIST, gateways)
-
-    def _can_start(self, domain):
-        """
-        Returns True if it has everything that is needed to run EIP,
-        False otherwise
-
-        :param domain: the domain for the provider to check
-        :type domain: str
-        """
-        eip_config = eipconfig.EIPConfig()
-        provider_config = ProviderConfig.get_provider_config(domain)
-
-        api_version = provider_config.get_api_version()
-        eip_config.set_api_version(api_version)
-        eip_loaded = eip_config.load(eipconfig.get_eipconfig_path(domain))
-
-        launcher = get_vpn_launcher()
-        ovpn_path = force_eval(launcher.OPENVPN_BIN_PATH)
-        if not os.path.isfile(ovpn_path):
-            logger.error("Cannot start OpenVPN, binary not found")
-            return False
-
-        # check for other problems
-        if not eip_loaded or provider_config is None:
-            logger.error("Cannot load provider and eip config, cannot "
-                         "autostart")
-            return False
-
-        client_cert_path = eip_config.\
-            get_client_cert_path(provider_config, about_to_download=False)
-
-        if leap_certs.should_redownload(client_cert_path):
-            logger.error("The client should redownload the certificate,"
-                         " cannot autostart")
-            return False
-
-        if not os.path.isfile(client_cert_path):
-            logger.error("Can't find the certificate, cannot autostart")
-            return False
-
-        return True
-
-    def can_start(self, domain):
-        """
-        Signal whether it has everything that is needed to run EIP or not
-
-        :param domain: the domain for the provider to check
-        :type domain: str
-
-        Signals:
-            eip_can_start
-            eip_cannot_start
-        """
-        if self._can_start(domain):
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.EIP_CAN_START)
-        else:
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.EIP_CANNOT_START)
-
-    def check_dns(self, domain):
-        """
-        Check if we can resolve the given domain name.
-
-        :param domain: the domain to check.
-        :type domain: str
-        """
-        def do_check():
-            """
-            Try to resolve the domain name.
-            """
-            socket.gethostbyname(domain.encode('idna'))
-
-        def check_ok(_):
-            """
-            Callback handler for `do_check`.
-            """
-            self._signaler.signal(self._signaler.EIP_DNS_OK)
-            logger.debug("DNS check OK")
-
-        def check_err(failure):
-            """
-            Errback handler for `do_check`.
-
-            :param failure: the failure that triggered the errback.
-            :type failure: twisted.python.failure.Failure
-            """
-            logger.debug("Can't resolve hostname. {0!r}".format(failure))
-
-            self._signaler.signal(self._signaler.EIP_DNS_ERROR)
-
-            # python 2.7.4 raises socket.error
-            # python 2.7.5 raises socket.gaierror
-            failure.trap(socket.gaierror, socket.error)
-
-        d = threads.deferToThread(do_check)
-        d.addCallback(check_ok)
-        d.addErrback(check_err)
-
-
-class Soledad(object):
-    """
-    Interfaces with setup of Soledad.
-    """
-    zope.interface.implements(ILEAPComponent)
-
-    def __init__(self, soledad_proxy, keymanager_proxy, signaler=None):
-        """
-        Constructor for the Soledad component.
-
-        :param soledad_proxy: proxy to pass around a Soledad object.
-        :type soledad_proxy: zope.ProxyBase
-        :param keymanager_proxy: proxy to pass around a Keymanager object.
-        :type keymanager_proxy: zope.ProxyBase
-        :param signaler: Object in charge of handling communication
-                         back to the frontend
-        :type signaler: Signaler
-        """
-        self.key = "soledad"
-        self._soledad_proxy = soledad_proxy
-        self._keymanager_proxy = keymanager_proxy
-        self._signaler = signaler
-        self._soledad_bootstrapper = SoledadBootstrapper(signaler)
-        self._soledad_defer = None
-
-    def bootstrap(self, username, domain, password):
-        """
-        Bootstrap Soledad with the user credentials.
-
-        Signals:
-            soledad_download_config
-            soledad_gen_key
-
-        :param user: user's login
-        :type user: unicode
-        :param domain: the domain that we are using.
-        :type domain: unicode
-        :param password: user's password
-        :type password: unicode
-        """
-        provider_config = ProviderConfig.get_provider_config(domain)
-        if provider_config is not None:
-            self._soledad_defer = threads.deferToThread(
-                self._soledad_bootstrapper.run_soledad_setup_checks,
-                provider_config, username, password,
-                download_if_needed=True)
-            self._soledad_defer.addCallback(self._set_proxies_cb)
-        else:
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.SOLEDAD_BOOTSTRAP_FAILED)
-            logger.error("Could not load provider configuration.")
-
-        return self._soledad_defer
-
-    def _set_proxies_cb(self, _):
-        """
-        Update the soledad and keymanager proxies to reference the ones created
-        in the bootstrapper.
-        """
-        zope.proxy.setProxiedObject(self._soledad_proxy,
-                                    self._soledad_bootstrapper.soledad)
-        zope.proxy.setProxiedObject(self._keymanager_proxy,
-                                    self._soledad_bootstrapper.keymanager)
-
-    def load_offline(self, username, password, uuid):
-        """
-        Load the soledad database in offline mode.
-
-        :param username: full user id (user@provider)
-        :type username: str or unicode
-        :param password: the soledad passphrase
-        :type password: unicode
-        :param uuid: the user uuid
-        :type uuid: str or unicode
-
-        Signals:
-            Signaler.soledad_offline_finished
-            Signaler.soledad_offline_failed
-        """
-        self._soledad_bootstrapper.load_offline_soledad(
-            username, password, uuid)
-
-    def cancel_bootstrap(self):
-        """
-        Cancel the ongoing soledad bootstrap (if any).
-        """
-        if self._soledad_defer is not None:
-            logger.debug("Cancelling soledad defer.")
-            self._soledad_defer.cancel()
-            self._soledad_defer = None
-            zope.proxy.setProxiedObject(self._soledad_proxy, None)
-
-    def close(self):
-        """
-        Close soledad database.
-        """
-        if not zope.proxy.sameProxiedObjects(self._soledad_proxy, None):
-            self._soledad_proxy.close()
-            zope.proxy.setProxiedObject(self._soledad_proxy, None)
-
-    def _change_password_ok(self, _):
-        """
-        Password change callback.
-        """
-        if self._signaler is not None:
-            self._signaler.signal(self._signaler.SOLEDAD_PASSWORD_CHANGE_OK)
-
-    def _change_password_error(self, failure):
-        """
-        Password change errback.
-
-        :param failure: failure object containing problem.
-        :type failure: twisted.python.failure.Failure
-        """
-        if failure.check(NoStorageSecret):
-            logger.error("No storage secret for password change in Soledad.")
-        if failure.check(PassphraseTooShort):
-            logger.error("Passphrase too short.")
-
-        if self._signaler is not None:
-            self._signaler.signal(self._signaler.SOLEDAD_PASSWORD_CHANGE_ERROR)
-
-    def change_password(self, new_password):
-        """
-        Change the database's password.
-
-        :param new_password: the new password.
-        :type new_password: unicode
-
-        :returns: a defer to interact with.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        d = threads.deferToThread(self._soledad_proxy.change_passphrase,
-                                  new_password)
-        d.addCallback(self._change_password_ok)
-        d.addErrback(self._change_password_error)
-
-
-class Keymanager(object):
-    """
-    Interfaces with KeyManager.
-    """
-    zope.interface.implements(ILEAPComponent)
-
-    def __init__(self, keymanager_proxy, signaler=None):
-        """
-        Constructor for the Keymanager component.
-
-        :param keymanager_proxy: proxy to pass around a Keymanager object.
-        :type keymanager_proxy: zope.ProxyBase
-        :param signaler: Object in charge of handling communication
-                         back to the frontend
-        :type signaler: Signaler
-        """
-        self.key = "keymanager"
-        self._keymanager_proxy = keymanager_proxy
-        self._signaler = signaler
-
-    def import_keys(self, username, filename):
-        """
-        Imports the username's key pair.
-        Those keys need to be ascii armored.
-
-        :param username: the user that will have the imported pair of keys.
-        :type username: str
-        :param filename: the name of the file where the key pair is stored.
-        :type filename: str
-        """
-        # NOTE: This feature is disabled right now since is dangerous
-        return
-
-        new_key = ''
-        signal = None
-        try:
-            with open(filename, 'r') as keys_file:
-                new_key = keys_file.read()
-        except IOError as e:
-            logger.error("IOError importing key. {0!r}".format(e))
-            signal = self._signaler.KEYMANAGER_IMPORT_IOERROR
-            self._signaler.signal(signal)
-            return
-
-        keymanager = self._keymanager_proxy
-        try:
-            public_key, private_key = keymanager.parse_openpgp_ascii_key(
-                new_key)
-        except (KeyAddressMismatch, KeyFingerprintMismatch) as e:
-            logger.error(repr(e))
-            signal = self._signaler.KEYMANAGER_IMPORT_DATAMISMATCH
-            self._signaler.signal(signal)
-            return
-
-        if public_key is None or private_key is None:
-            signal = self._signaler.KEYMANAGER_IMPORT_MISSINGKEY
-            self._signaler.signal(signal)
-            return
-
-        current_public_key = keymanager.get_key(username, openpgp.OpenPGPKey)
-        if public_key.address != current_public_key.address:
-            logger.error("The key does not match the ID")
-            signal = self._signaler.KEYMANAGER_IMPORT_ADDRESSMISMATCH
-            self._signaler.signal(signal)
-            return
-
-        keymanager.delete_key(self._key)
-        keymanager.delete_key(self._key_priv)
-        keymanager.put_key(public_key)
-        keymanager.put_key(private_key)
-        keymanager.send_key(openpgp.OpenPGPKey)
-
-        logger.debug('Import ok')
-        signal = self._signaler.KEYMANAGER_IMPORT_OK
-
-        self._signaler.signal(signal)
-
-    def export_keys(self, username, filename):
-        """
-        Export the given username's keys to a file.
-
-        :param username: the username whos keys we need to export.
-        :type username: str
-        :param filename: the name of the file where we want to save the keys.
-        :type filename: str
-        """
-        keymanager = self._keymanager_proxy
-
-        public_key = keymanager.get_key(username, openpgp.OpenPGPKey)
-        private_key = keymanager.get_key(username, openpgp.OpenPGPKey,
-                                         private=True)
-        try:
-            with open(filename, 'w') as keys_file:
-                keys_file.write(public_key.key_data)
-                keys_file.write(private_key.key_data)
-
-            logger.debug('Export ok')
-            self._signaler.signal(self._signaler.KEYMANAGER_EXPORT_OK)
-        except IOError as e:
-            logger.error("IOError exporting key. {0!r}".format(e))
-            self._signaler.signal(self._signaler.KEYMANAGER_EXPORT_ERROR)
-
-    def list_keys(self):
-        """
-        List all the keys stored in the local DB.
-        """
-        keys = self._keymanager_proxy.get_all_keys_in_local_db()
-        self._signaler.signal(self._signaler.KEYMANAGER_KEYS_LIST, keys)
-
-    def get_key_details(self, username):
-        """
-        List all the keys stored in the local DB.
-        """
-        public_key = self._keymanager_proxy.get_key(username,
-                                                    openpgp.OpenPGPKey)
-        details = (public_key.key_id, public_key.fingerprint)
-        self._signaler.signal(self._signaler.KEYMANAGER_KEY_DETAILS, details)
-
-
-class Mail(object):
-    """
-    Interfaces with setup and launch of Mail.
-    """
-    # We give each service some time to come to a halt before forcing quit
-    SERVICE_STOP_TIMEOUT = 20
-
-    zope.interface.implements(ILEAPComponent)
-
-    def __init__(self, soledad_proxy, keymanager_proxy, signaler=None):
-        """
-        Constructor for the Mail component.
-
-        :param soledad_proxy: proxy to pass around a Soledad object.
-        :type soledad_proxy: zope.ProxyBase
-        :param keymanager_proxy: proxy to pass around a Keymanager object.
-        :type keymanager_proxy: zope.ProxyBase
-        :param signaler: Object in charge of handling communication
-                         back to the frontend
-        :type signaler: Signaler
-        """
-        self.key = "mail"
-        self._signaler = signaler
-        self._soledad_proxy = soledad_proxy
-        self._keymanager_proxy = keymanager_proxy
-        self._imap_controller = IMAPController(self._soledad_proxy,
-                                               self._keymanager_proxy)
-        self._smtp_bootstrapper = SMTPBootstrapper()
-        self._smtp_config = SMTPConfig()
-
-    def start_smtp_service(self, full_user_id, download_if_needed=False):
-        """
-        Start the SMTP service.
-
-        :param full_user_id: user id, in the form "user@provider"
-        :type full_user_id: str
-        :param download_if_needed: True if it should check for mtime
-                                   for the file
-        :type download_if_needed: bool
-
-        :returns: a defer to interact with.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        return threads.deferToThread(
-            self._smtp_bootstrapper.start_smtp_service,
-            self._keymanager_proxy, full_user_id, download_if_needed)
-
-    def start_imap_service(self, full_user_id, offline=False):
-        """
-        Start the IMAP service.
-
-        :param full_user_id: user id, in the form "user@provider"
-        :type full_user_id: str
-        :param offline: whether imap should start in offline mode or not.
-        :type offline: bool
-
-        :returns: a defer to interact with.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        return threads.deferToThread(
-            self._imap_controller.start_imap_service,
-            full_user_id, offline)
-
-    def stop_smtp_service(self):
-        """
-        Stop the SMTP service.
-
-        :returns: a defer to interact with.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        return threads.deferToThread(self._smtp_bootstrapper.stop_smtp_service)
-
-    def _stop_imap_service(self):
-        """
-        Stop imap and wait until the service is stopped to signal that is done.
-        """
-        cv = Condition()
-        cv.acquire()
-        threads.deferToThread(self._imap_controller.stop_imap_service, cv)
-        logger.debug('Waiting for imap service to stop.')
-        cv.wait(self.SERVICE_STOP_TIMEOUT)
-        logger.debug('IMAP stopped')
-        self._signaler.signal(self._signaler.IMAP_STOPPED)
-
-    def stop_imap_service(self):
-        """
-        Stop imap service (fetcher, factory and port).
-
-        :returns: a defer to interact with.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        return threads.deferToThread(self._stop_imap_service)
-
-
-class Authenticate(object):
-    """
-    Interfaces with setup and bootstrapping operations for a provider
-    """
-
-    zope.interface.implements(ILEAPComponent)
-
-    def __init__(self, signaler=None):
-        """
-        Constructor for the Authenticate component
-
-        :param signaler: Object in charge of handling communication
-                         back to the frontend
-        :type signaler: Signaler
-        """
-        self.key = "authenticate"
-        self._signaler = signaler
-        self._login_defer = None
-        self._srp_auth = SRPAuth(ProviderConfig(), self._signaler)
-
-    def login(self, domain, username, password):
-        """
-        Execute the whole authentication process for a user
-
-        :param domain: the domain where we need to authenticate.
-        :type domain: unicode
-        :param username: username for this session
-        :type username: str
-        :param password: password for this user
-        :type password: str
-
-        :returns: the defer for the operation running in a thread.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        config = ProviderConfig.get_provider_config(domain)
-        if config is not None:
-            self._srp_auth = SRPAuth(config, self._signaler)
-            self._login_defer = self._srp_auth.authenticate(username, password)
-            return self._login_defer
-        else:
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.SRP_AUTH_ERROR)
-            logger.error("Could not load provider configuration.")
-
-    def cancel_login(self):
-        """
-        Cancel the ongoing login defer (if any).
-        """
-        d = self._login_defer
-        if d is not None:
-            d.cancel()
-
-    def change_password(self, current_password, new_password):
-        """
-        Change the user's password.
-
-        :param current_password: the current password of the user.
-        :type current_password: str
-        :param new_password: the new password for the user.
-        :type new_password: str
-
-        :returns: a defer to interact with.
-        :rtype: twisted.internet.defer.Deferred
-        """
-        if not self._is_logged_in():
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.SRP_NOT_LOGGED_IN_ERROR)
-            return
-
-        return self._srp_auth.change_password(current_password, new_password)
-
-    def logout(self):
-        """
-        Log out the current session.
-        Expects a session_id to exists, might raise AssertionError
-        """
-        if not self._is_logged_in():
-            if self._signaler is not None:
-                self._signaler.signal(self._signaler.SRP_NOT_LOGGED_IN_ERROR)
-            return
-
-        self._srp_auth.logout()
-
-    def _is_logged_in(self):
-        """
-        Return whether the user is logged in or not.
-
-        :rtype: bool
-        """
-        return (self._srp_auth is not None and
-                self._srp_auth.is_authenticated())
-
-    def get_logged_in_status(self):
-        """
-        Signal if the user is currently logged in or not.
-        """
-        if self._signaler is None:
-            return
-
-        signal = None
-        if self._is_logged_in():
-            signal = self._signaler.SRP_STATUS_LOGGED_IN
-        else:
-            signal = self._signaler.SRP_STATUS_NOT_LOGGED_IN
-
-        self._signaler.signal(signal)
-
-
 class Backend(object):
     """
     Backend for everything, the UI should only use this class.
@@ -1180,18 +61,18 @@ class Backend(object):
         self._keymanager_proxy = zope.proxy.ProxyBase(None)
 
         # Component registration
-        self._register(Provider(self._signaler, bypass_checks))
-        self._register(Register(self._signaler))
-        self._register(Authenticate(self._signaler))
-        self._register(EIP(self._signaler))
-        self._register(Soledad(self._soledad_proxy,
-                               self._keymanager_proxy,
-                               self._signaler))
-        self._register(Keymanager(self._keymanager_proxy,
-                                  self._signaler))
-        self._register(Mail(self._soledad_proxy,
-                            self._keymanager_proxy,
-                            self._signaler))
+        self._register(components.Provider(self._signaler, bypass_checks))
+        self._register(components.Register(self._signaler))
+        self._register(components.Authenticate(self._signaler))
+        self._register(components.EIP(self._signaler))
+        self._register(components.Soledad(self._soledad_proxy,
+                                          self._keymanager_proxy,
+                                          self._signaler))
+        self._register(components.Keymanager(self._keymanager_proxy,
+                                             self._signaler))
+        self._register(components.Mail(self._soledad_proxy,
+                                       self._keymanager_proxy,
+                                       self._signaler))
 
         # We have a looping call on a thread executing all the
         # commands in queue. Right now this queue is an actual Queue