import os, stat, time, weakref from allmydata.interfaces import RIStorageServer from allmydata import node from zope.interface import implements from twisted.internet import reactor, defer from twisted.application import service from twisted.application.internet import TimerService from foolscap.api import Referenceable from pycryptopp.publickey import rsa import allmydata from allmydata.storage.server import StorageServer from allmydata import storage_client from allmydata.immutable.upload import Uploader from allmydata.immutable.offloaded import Helper from allmydata.control import ControlServer from allmydata.introducer.client import IntroducerClient from allmydata.util import hashutil, base32, pollmixin, log from allmydata.util.encodingutil import get_filesystem_encoding from allmydata.util.abbreviate import parse_abbreviated_size from allmydata.util.time_format import parse_duration, parse_date from allmydata.stats import StatsProvider from allmydata.history import History from allmydata.interfaces import IStatsProducer, RIStubClient from allmydata.nodemaker import NodeMaker KiB=1024 MiB=1024*KiB GiB=1024*MiB TiB=1024*GiB PiB=1024*TiB class StubClient(Referenceable): implements(RIStubClient) def _make_secret(): return base32.b2a(os.urandom(hashutil.CRYPTO_VAL_SIZE)) + "\n" class SecretHolder: def __init__(self, lease_secret, convergence_secret): self._lease_secret = lease_secret self._convergence_secret = convergence_secret def get_renewal_secret(self): return hashutil.my_renewal_secret_hash(self._lease_secret) def get_cancel_secret(self): return hashutil.my_cancel_secret_hash(self._lease_secret) def get_convergence_secret(self): return self._convergence_secret class KeyGenerator: """I create RSA keys for mutable files. Each call to generate() returns a single keypair. The keysize is specified first by the keysize= argument to generate(), then with a default set by set_default_keysize(), then with a built-in default of 2048 bits.""" def __init__(self): self._remote = None self.default_keysize = 2048 def set_remote_generator(self, keygen): self._remote = keygen def set_default_keysize(self, keysize): """Call this to override the size of the RSA keys created for new mutable files which don't otherwise specify a size. This will affect all subsequent calls to generate() without a keysize= argument. The default size is 2048 bits. Test cases should call this method once during setup, to cause me to create smaller (522 bit) keys, so the unit tests run faster.""" self.default_keysize = keysize def generate(self, keysize=None): """I return a Deferred that fires with a (verifyingkey, signingkey) pair. I accept a keysize in bits (522 bit keys are fast for testing, 2048 bit keys are standard). If you do not provide a keysize, I will use my default, which is set by a call to set_default_keysize(). If set_default_keysize() has never been called, I will create 2048 bit keys.""" keysize = keysize or self.default_keysize if self._remote: d = self._remote.callRemote('get_rsa_key_pair', keysize) def make_key_objs((verifying_key, signing_key)): v = rsa.create_verifying_key_from_string(verifying_key) s = rsa.create_signing_key_from_string(signing_key) return v, s d.addCallback(make_key_objs) return d else: # RSA key generation for a 2048 bit key takes between 0.8 and 3.2 # secs signer = rsa.generate(keysize) verifier = signer.get_verifying_key() return defer.succeed( (verifier, signer) ) class Terminator(service.Service): def __init__(self): self._clients = weakref.WeakKeyDictionary() def register(self, c): self._clients[c] = None def stopService(self): for c in self._clients: c.stop() return service.Service.stopService(self) class Client(node.Node, pollmixin.PollMixin): implements(IStatsProducer) PORTNUMFILE = "client.port" STOREDIR = 'storage' NODETYPE = "client" SUICIDE_PREVENTION_HOTLINE_FILE = "suicide_prevention_hotline" # This means that if a storage server treats me as though I were a # 1.0.0 storage client, it will work as they expect. OLDEST_SUPPORTED_VERSION = "1.0.0" # this is a tuple of (needed, desired, total, max_segment_size). 'needed' # is the number of shares required to reconstruct a file. 'desired' means # that we will abort an upload unless we can allocate space for at least # this many. 'total' is the total number of shares created by encoding. # If everybody has room then this is is how many we will upload. DEFAULT_ENCODING_PARAMETERS = {"k": 3, "happy": 7, "n": 10, "max_segment_size": 128*KiB, } def __init__(self, basedir="."): node.Node.__init__(self, basedir) self.started_timestamp = time.time() self.logSource="Client" self.DEFAULT_ENCODING_PARAMETERS = self.DEFAULT_ENCODING_PARAMETERS.copy() self.init_introducer_client() self.init_stats_provider() self.init_secrets() self.init_storage() self.init_control() self.helper = None if self.get_config("helper", "enabled", False, boolean=True): self.init_helper() self._key_generator = KeyGenerator() key_gen_furl = self.get_config("client", "key_generator.furl", None) if key_gen_furl: self.init_key_gen(key_gen_furl) self.init_client() # ControlServer and Helper are attached after Tub startup self.init_ftp_server() self.init_sftp_server() hotline_file = os.path.join(self.basedir, self.SUICIDE_PREVENTION_HOTLINE_FILE) if os.path.exists(hotline_file): age = time.time() - os.stat(hotline_file)[stat.ST_MTIME] self.log("hotline file noticed (%ds old), starting timer" % age) hotline = TimerService(1.0, self._check_hotline, hotline_file) hotline.setServiceParent(self) # this needs to happen last, so it can use getServiceNamed() to # acquire references to StorageServer and other web-statusable things webport = self.get_config("node", "web.port", None) if webport: self.init_web(webport) # strports string def read_old_config_files(self): node.Node.read_old_config_files(self) copy = self._copy_config_from_file copy("introducer.furl", "client", "introducer.furl") copy("helper.furl", "client", "helper.furl") copy("key_generator.furl", "client", "key_generator.furl") copy("stats_gatherer.furl", "client", "stats_gatherer.furl") if os.path.exists(os.path.join(self.basedir, "no_storage")): self.set_config("storage", "enabled", "false") if os.path.exists(os.path.join(self.basedir, "readonly_storage")): self.set_config("storage", "readonly", "true") if os.path.exists(os.path.join(self.basedir, "debug_discard_storage")): self.set_config("storage", "debug_discard", "true") if os.path.exists(os.path.join(self.basedir, "run_helper")): self.set_config("helper", "enabled", "true") def init_introducer_client(self): self.introducer_furl = self.get_config("client", "introducer.furl") ic = IntroducerClient(self.tub, self.introducer_furl, self.nickname, str(allmydata.__full_version__), str(self.OLDEST_SUPPORTED_VERSION)) self.introducer_client = ic # hold off on starting the IntroducerClient until our tub has been # started, so we'll have a useful address on our RemoteReference, so # that the introducer's status page will show us. d = self.when_tub_ready() def _start_introducer_client(res): ic.setServiceParent(self) d.addCallback(_start_introducer_client) d.addErrback(log.err, facility="tahoe.init", level=log.BAD, umid="URyI5w") def init_stats_provider(self): gatherer_furl = self.get_config("client", "stats_gatherer.furl", None) self.stats_provider = StatsProvider(self, gatherer_furl) self.add_service(self.stats_provider) self.stats_provider.register_producer(self) def get_stats(self): return { 'node.uptime': time.time() - self.started_timestamp } def init_secrets(self): lease_s = self.get_or_create_private_config("secret", _make_secret) lease_secret = base32.a2b(lease_s) convergence_s = self.get_or_create_private_config('convergence', _make_secret) self.convergence = base32.a2b(convergence_s) self._secret_holder = SecretHolder(lease_secret, self.convergence) def init_storage(self): # should we run a storage server (and publish it for others to use)? if not self.get_config("storage", "enabled", True, boolean=True): return readonly = self.get_config("storage", "readonly", False, boolean=True) storedir = os.path.join(self.basedir, self.STOREDIR) data = self.get_config("storage", "reserved_space", None) reserved = None try: reserved = parse_abbreviated_size(data) except ValueError: log.msg("[storage]reserved_space= contains unparseable value %s" % data) if reserved is None: reserved = 0 discard = self.get_config("storage", "debug_discard", False, boolean=True) expire = self.get_config("storage", "expire.enabled", False, boolean=True) if expire: mode = self.get_config("storage", "expire.mode") # require a mode else: mode = self.get_config("storage", "expire.mode", "age") o_l_d = self.get_config("storage", "expire.override_lease_duration", None) if o_l_d is not None: o_l_d = parse_duration(o_l_d) cutoff_date = None if mode == "cutoff-date": cutoff_date = self.get_config("storage", "expire.cutoff_date") cutoff_date = parse_date(cutoff_date) sharetypes = [] if self.get_config("storage", "expire.immutable", True, boolean=True): sharetypes.append("immutable") if self.get_config("storage", "expire.mutable", True, boolean=True): sharetypes.append("mutable") expiration_sharetypes = tuple(sharetypes) ss = StorageServer(storedir, self.nodeid, reserved_space=reserved, discard_storage=discard, readonly_storage=readonly, stats_provider=self.stats_provider, expiration_enabled=expire, expiration_mode=mode, expiration_override_lease_duration=o_l_d, expiration_cutoff_date=cutoff_date, expiration_sharetypes=expiration_sharetypes) self.add_service(ss) d = self.when_tub_ready() # we can't do registerReference until the Tub is ready def _publish(res): furl_file = os.path.join(self.basedir, "private", "storage.furl").encode(get_filesystem_encoding()) furl = self.tub.registerReference(ss, furlFile=furl_file) ri_name = RIStorageServer.__remote_name__ self.introducer_client.publish(furl, "storage", ri_name) d.addCallback(_publish) d.addErrback(log.err, facility="tahoe.init", level=log.BAD, umid="aLGBKw") def init_client(self): helper_furl = self.get_config("client", "helper.furl", None) DEP = self.DEFAULT_ENCODING_PARAMETERS DEP["k"] = int(self.get_config("client", "shares.needed", DEP["k"])) DEP["n"] = int(self.get_config("client", "shares.total", DEP["n"])) DEP["happy"] = int(self.get_config("client", "shares.happy", DEP["happy"])) self.init_client_storage_broker() self.history = History(self.stats_provider) self.terminator = Terminator() self.terminator.setServiceParent(self) self.add_service(Uploader(helper_furl, self.stats_provider)) self.init_stub_client() self.init_nodemaker() def init_client_storage_broker(self): # create a StorageFarmBroker object, for use by Uploader/Downloader # (and everybody else who wants to use storage servers) sb = storage_client.StorageFarmBroker(self.tub, permute_peers=True) self.storage_broker = sb # load static server specifications from tahoe.cfg, if any. # Not quite ready yet. #if self.config.has_section("client-server-selection"): # server_params = {} # maps serverid to dict of parameters # for (name, value) in self.config.items("client-server-selection"): # pieces = name.split(".") # if pieces[0] == "server": # serverid = pieces[1] # if serverid not in server_params: # server_params[serverid] = {} # server_params[serverid][pieces[2]] = value # for serverid, params in server_params.items(): # server_type = params.pop("type") # if server_type == "tahoe-foolscap": # s = storage_client.NativeStorageClient(*params) # else: # msg = ("unrecognized server type '%s' in " # "tahoe.cfg [client-server-selection]server.%s.type" # % (server_type, serverid)) # raise storage_client.UnknownServerTypeError(msg) # sb.add_server(s.serverid, s) # check to see if we're supposed to use the introducer too if self.get_config("client-server-selection", "use_introducer", default=True, boolean=True): sb.use_introducer(self.introducer_client) def get_storage_broker(self): return self.storage_broker def init_stub_client(self): def _publish(res): # we publish an empty object so that the introducer can count how # many clients are connected and see what versions they're # running. sc = StubClient() furl = self.tub.registerReference(sc) ri_name = RIStubClient.__remote_name__ self.introducer_client.publish(furl, "stub_client", ri_name) d = self.when_tub_ready() d.addCallback(_publish) d.addErrback(log.err, facility="tahoe.init", level=log.BAD, umid="OEHq3g") def init_nodemaker(self): self.nodemaker = NodeMaker(self.storage_broker, self._secret_holder, self.get_history(), self.getServiceNamed("uploader"), self.terminator, self.get_encoding_parameters(), self._key_generator) def get_history(self): return self.history def init_control(self): d = self.when_tub_ready() def _publish(res): c = ControlServer() c.setServiceParent(self) control_url = self.tub.registerReference(c) self.write_private_config("control.furl", control_url + "\n") d.addCallback(_publish) d.addErrback(log.err, facility="tahoe.init", level=log.BAD, umid="d3tNXA") def init_helper(self): d = self.when_tub_ready() def _publish(self): self.helper = Helper(os.path.join(self.basedir, "helper"), self.storage_broker, self._secret_holder, self.stats_provider, self.history) # TODO: this is confusing. BASEDIR/private/helper.furl is created # by the helper. BASEDIR/helper.furl is consumed by the client # who wants to use the helper. I like having the filename be the # same, since that makes 'cp' work smoothly, but the difference # between config inputs and generated outputs is hard to see. helper_furlfile = os.path.join(self.basedir, "private", "helper.furl").encode(get_filesystem_encoding()) self.tub.registerReference(self.helper, furlFile=helper_furlfile) d.addCallback(_publish) d.addErrback(log.err, facility="tahoe.init", level=log.BAD, umid="K0mW5w") def init_key_gen(self, key_gen_furl): d = self.when_tub_ready() def _subscribe(self): self.tub.connectTo(key_gen_furl, self._got_key_generator) d.addCallback(_subscribe) d.addErrback(log.err, facility="tahoe.init", level=log.BAD, umid="z9DMzw") def _got_key_generator(self, key_generator): self._key_generator.set_remote_generator(key_generator) key_generator.notifyOnDisconnect(self._lost_key_generator) def _lost_key_generator(self): self._key_generator.set_remote_generator(None) def set_default_mutable_keysize(self, keysize): self._key_generator.set_default_keysize(keysize) def init_web(self, webport): self.log("init_web(webport=%s)", args=(webport,)) from allmydata.webish import WebishServer nodeurl_path = os.path.join(self.basedir, "node.url") staticdir = self.get_config("node", "web.static", "public_html") staticdir = os.path.expanduser(staticdir) ws = WebishServer(self, webport, nodeurl_path, staticdir) self.add_service(ws) def init_ftp_server(self): if self.get_config("ftpd", "enabled", False, boolean=True): accountfile = self.get_config("ftpd", "accounts.file", None) accounturl = self.get_config("ftpd", "accounts.url", None) ftp_portstr = self.get_config("ftpd", "port", "8021") from allmydata.frontends import ftpd s = ftpd.FTPServer(self, accountfile, accounturl, ftp_portstr) s.setServiceParent(self) def init_sftp_server(self): if self.get_config("sftpd", "enabled", False, boolean=True): accountfile = self.get_config("sftpd", "accounts.file", None) accounturl = self.get_config("sftpd", "accounts.url", None) sftp_portstr = self.get_config("sftpd", "port", "8022") pubkey_file = self.get_config("sftpd", "host_pubkey_file") privkey_file = self.get_config("sftpd", "host_privkey_file") from allmydata.frontends import sftpd s = sftpd.SFTPServer(self, accountfile, accounturl, sftp_portstr, pubkey_file, privkey_file) s.setServiceParent(self) def _check_hotline(self, hotline_file): if os.path.exists(hotline_file): mtime = os.stat(hotline_file)[stat.ST_MTIME] if mtime > time.time() - 120.0: return else: self.log("hotline file too old, shutting down") else: self.log("hotline file missing, shutting down") reactor.stop() def get_encoding_parameters(self): return self.DEFAULT_ENCODING_PARAMETERS def connected_to_introducer(self): if self.introducer_client: return self.introducer_client.connected_to_introducer() return False def get_renewal_secret(self): # this will go away return self._secret_holder.get_renewal_secret() def get_cancel_secret(self): return self._secret_holder.get_cancel_secret() def debug_wait_for_client_connections(self, num_clients): """Return a Deferred that fires (with None) when we have connections to the given number of peers. Useful for tests that set up a temporary test network and need to know when it is safe to proceed with an upload or download.""" def _check(): return len(self.storage_broker.get_all_servers()) >= num_clients d = self.poll(_check, 0.5) d.addCallback(lambda res: None) return d # these four methods are the primitives for creating filenodes and # dirnodes. The first takes a URI and produces a filenode or (new-style) # dirnode. The other three create brand-new filenodes/dirnodes. def create_node_from_uri(self, write_uri, read_uri=None, deep_immutable=False, name=""): # This returns synchronously. # Note that it does *not* validate the write_uri and read_uri; instead we # may get an opaque node if there were any problems. return self.nodemaker.create_from_cap(write_uri, read_uri, deep_immutable=deep_immutable, name=name) def create_dirnode(self, initial_children={}): d = self.nodemaker.create_new_mutable_directory(initial_children) return d def create_immutable_dirnode(self, children, convergence=None): return self.nodemaker.create_immutable_directory(children, convergence) def create_mutable_file(self, contents=None, keysize=None): return self.nodemaker.create_mutable_file(contents, keysize) def upload(self, uploadable): uploader = self.getServiceNamed("uploader") return uploader.upload(uploadable, history=self.get_history())