d.addCallback(lambda res: None)
return d
+
+ def create_empty_dirnode(self):
+ from allmydata.mutable import NewDirectoryNode
+ n = NewDirectoryNode(self)
+ d = n.create()
+ d.addCallback(lambda res: n)
+ return d
+
+ def create_dirnode_from_uri(self, u):
+ from allmydata.mutable import NewDirectoryNode
+ return NewDirectoryNode(self).init_from_uri(u)
+
+ def create_mutable_file(self, contents=""):
+ from allmydata.mutable import MutableFileNode
+ n = MutableFileNode(self)
+ d = n.create(contents)
+ d.addCallback(lambda res: n)
+ return d
+
+ def create_mutable_file_from_uri(self, u):
+ from allmydata.mutable import MutableFileNode
+ return MutableFileNode(self).init_from_uri(u)
+
+ def create_file_from_uri(self, u):
+ from allmydata.mutable import FileNode
+ return FileNode(u, self)
def get_size():
"""Return the length (in bytes) of the file that I represent."""
+class IMutableFileURI(Interface):
+ """I am a URI which represents a mutable filenode."""
+ pass
+class INewDirectoryURI(Interface):
+ pass
+
class IFileNode(Interface):
def download(target):
def check():
"""Perform a file check. See IChecker.check for details."""
+class IMutableFileNode(Interface):
+ def download_to_data():
+ """Download the file's contents. Return a Deferred that fires with
+ those contents. If there are multiple retrievable versions in the
+ grid (because you failed to avoid simultaneous writes, see
+ docs/mutable.txt), this will return the first version that it can
+ reconstruct, and will silently ignore the others. In the future, a
+ more advanced API will signal and provide access to the multiple
+ heads."""
+ def replace(newdata):
+ """Replace the old contents with the new data. Returns a Deferred
+ that fires (with None) when the operation is complete.
+
+ If the node detects that there are multiple outstanding versions of
+ the file, this will raise ConsistencyError, and may leave the
+ distributed file in an unusual state (the node will try to ensure
+ that at least one version of the file remains retrievable, but it may
+ or may not be the one you just tried to upload). You should respond
+ to this by downloading the current contents of the file and retrying
+ the replace() operation.
+ """
+
+ def get_uri():
+ pass
+ def get_verifier():
+ pass
+ def check():
+ pass
+
+ def get_writekey():
+ """Return this filenode's writekey, or None if the node does not have
+ write-capability. This may be used to assist with data structures
+ that need to make certain data available only to writers, such as the
+ read-write child caps in dirnodes. The recommended process is to have
+ reader-visible data be submitted to the filenode in the clear (where
+ it will be encrypted by the filenode using the readkey), but encrypt
+ writer-visible data using this writekey.
+ """
+
class IDirectoryNode(Interface):
def is_mutable():
"""Return True if this directory is mutable, False if it is read-only.
--- /dev/null
+
+import os
+from zope.interface import implements
+from twisted.internet import defer
+import simplejson
+from allmydata.interfaces import IMutableFileNode, IDirectoryNode,\
+ IMutableFileURI, INewDirectoryURI, IURI, IFileNode, NotMutableError
+from allmydata.util import hashutil
+from allmydata.util.hashutil import netstring
+from allmydata.dirnode import IntegrityCheckError
+from allmydata.uri import WriteableSSKFileURI, NewDirectoryURI
+from allmydata.Crypto.Cipher import AES
+
+class MutableFileNode:
+ implements(IMutableFileNode)
+
+ def __init__(self, client):
+ self._client = client
+ self._pubkey = None # filled in upon first read
+ self._privkey = None # filled in if we're mutable
+ self._sharemap = {} # known shares, shnum-to-nodeid
+
+ def init_from_uri(self, myuri):
+ self._uri = IMutableFileURI(myuri)
+ return self
+
+ def create(self, initial_contents):
+ """Call this when the filenode is first created. This will generate
+ the keys, generate the initial shares, allocate shares, and upload
+ the initial contents. Returns a Deferred that fires (with the
+ MutableFileNode instance you should use) when it completes.
+ """
+ self._privkey = "very private"
+ self._pubkey = "public"
+ self._writekey = hashutil.ssk_writekey_hash(self._privkey)
+ self._fingerprint = hashutil.ssk_pubkey_fingerprint_hash(self._pubkey)
+ self._uri = WriteableSSKFileURI(self._writekey, self._fingerprint)
+ d = defer.succeed(None)
+ return d
+
+
+ def get_uri(self):
+ return self._uri.to_string()
+
+ def is_mutable(self):
+ return self._uri.is_mutable()
+
+ def __hash__(self):
+ return hash((self.__class__, self.uri))
+ def __cmp__(self, them):
+ if cmp(type(self), type(them)):
+ return cmp(type(self), type(them))
+ if cmp(self.__class__, them.__class__):
+ return cmp(self.__class__, them.__class__)
+ return cmp(self.uri, them.uri)
+
+ def get_verifier(self):
+ return IMutableFileURI(self.uri).get_verifier()
+
+ def check(self):
+ verifier = self.get_verifier()
+ return self._client.getServiceNamed("checker").check(verifier)
+
+ def download(self, target):
+ #downloader = self._client.getServiceNamed("downloader")
+ #return downloader.download(self.uri, target)
+ raise NotImplementedError
+
+ def download_to_data(self):
+ #downloader = self._client.getServiceNamed("downloader")
+ #return downloader.download_to_data(self.uri)
+ return defer.succeed("this isn't going to fool you, is it")
+
+ def replace(self, newdata):
+ return defer.succeed(None)
+
+# use client.create_mutable_file() to make one of these
+
+def split_netstring(data, numstrings, allow_leftover=False):
+ """like string.split(), but extracts netstrings. If allow_leftover=False,
+ returns numstrings elements, and throws ValueError if there was leftover
+ data. If allow_leftover=True, returns numstrings+1 elements, in which the
+ last element is the leftover data (possibly an empty string)"""
+ elements = []
+ assert numstrings >= 0
+ while data:
+ colon = data.index(":")
+ length = int(data[:colon])
+ string = data[colon+1:colon+1+length]
+ assert len(string) == length
+ elements.append(string)
+ assert data[colon+1+length] == ","
+ data = data[colon+1+length+1:]
+ if len(elements) == numstrings:
+ break
+ if len(elements) < numstrings:
+ raise ValueError("ran out of netstrings")
+ if allow_leftover:
+ return tuple(elements + [data])
+ if data:
+ raise ValueError("leftover data in netstrings")
+ return tuple(elements)
+
+class NewDirectoryNode:
+ implements(IDirectoryNode)
+ filenode_class = MutableFileNode
+
+ def __init__(self, client):
+ self._client = client
+ def init_from_uri(self, myuri):
+ u = INewDirectoryURI(myuri)
+ self._uri = u
+ self._node = self.filenode_class(self._client)
+ self._node.init_from_uri(u.get_filenode_uri())
+ return self
+
+ def create(self):
+ # first we create a MutableFileNode with empty_contents, then use its
+ # URI to create our own.
+ self._node = self.filenode_class(self._client)
+ empty_contents = self._pack_contents({})
+ d = self._node.create(empty_contents)
+ d.addCallback(self._filenode_created)
+ return d
+ def _filenode_created(self, res):
+ self._uri = NewDirectoryURI(self._node._uri)
+ return None
+
+ def _read(self):
+ d = self._node.download_to_data()
+ d.addCallback(self._unpack_contents)
+ return d
+
+ def _encrypt_rwcap(self, rwcap):
+ assert isinstance(rwcap, str)
+ IV = os.urandom(16)
+ key = hashutil.mutable_rwcap_key_hash(IV, self._node.writekey)
+ counterstart = "\x00"*16
+ cryptor = AES.new(key=key, mode=AES.MODE_CTR, counterstart=counterstart)
+ crypttext = cryptor.encrypt(rwcap)
+ mac = hashutil.hmac(key, IV + crypttext)
+ assert len(mac) == 32
+ return IV + crypttext + mac
+
+ def _decrypt_rwcapdata(self, encwrcap):
+ IV = encwrcap[:16]
+ crypttext = encwrcap[16:-32]
+ mac = encwrcap[-32:]
+ key = hashutil.mutable_rwcap_key_hash(IV, self._node.writekey)
+ if mac != hashutil.hmac(key, IV+crypttext):
+ raise IntegrityCheckError("HMAC does not match, crypttext is corrupted")
+ counterstart = "\x00"*16
+ cryptor = AES.new(key=key, mode=AES.MODE_CTR, counterstart=counterstart)
+ plaintext = cryptor.decrypt(crypttext)
+ return plaintext
+
+ def _create_node(self, child_uri):
+ u = IURI(child_uri)
+ if INewDirectoryURI.providedBy(u):
+ return self._client.create_dirnode_from_uri(u)
+ if IFileNode.providedBy(u):
+ return self._client.create_file_from_uri(u)
+ if IMutableFileURI.providedBy(u):
+ return self._client.create_mutable_file_from_uri(u)
+ raise TypeError("cannot handle URI")
+
+ def _unpack_contents(self, data):
+ # the directory is serialized as a list of netstrings, one per child.
+ # Each child is serialized as a list of four netstrings: (name,
+ # rocap, rwcap, metadata), in which the name,rocap,metadata are in
+ # cleartext. The rwcap is formatted as:
+ # pack("16ss32s", iv, AES(H(writekey+iv), plaintextrwcap), mac)
+ assert isinstance(data, str)
+ # an empty directory is serialized as an empty string
+ if data == "":
+ return {}
+ mutable = self.is_mutable()
+ children = {}
+ while len(data) > 0:
+ entry, data = split_netstring(data, 1, True)
+ name, rocap, rwcapdata, metadata_s = split_netstring(entry, 4)
+ if mutable:
+ rwcap = self._decrypt_rwcapdata(rwcapdata)
+ child = self._create_node(rwcap)
+ else:
+ child = self._create_node(rocap)
+ metadata = simplejson.loads(metadata_s)
+ assert isinstance(metadata, dict)
+ children[name] = (child, metadata)
+ return children
+
+ def _pack_contents(self, children):
+ # expects children in the same format as _unpack_contents
+ assert isinstance(children, dict)
+ entries = []
+ for name in sorted(children.keys()):
+ child, metadata = children[name]
+ assert (IFileNode.providedBy(child)
+ or IMutableFileNode.providedBy(child)
+ or IDirectoryNode.providedBy(child))
+ assert isinstance(metadata, dict)
+ rwcap = child.get_uri() # might be RO if the child is not mutable
+ rocap = child.get_readonly()
+ entry = "".join([netstring(name),
+ netstring(rocap),
+ netstring(self._encrypt_rwcap(rwcap)),
+ netstring(simplejson.dumps(metadata))])
+ entries.append(netstring(entry))
+ return "".join(entries)
+
+ def is_mutable(self):
+ return self._node.is_mutable()
+
+ def get_uri(self):
+ return self._uri.to_string()
+
+ def get_immutable_uri(self):
+ return self._uri.get_readonly().to_string()
+
+ def get_verifier(self):
+ return self._uri.get_verifier().to_string()
+
+ def check(self):
+ """Perform a file check. See IChecker.check for details."""
+ pass
+
+ def list(self):
+ """I return a Deferred that fires with a dictionary mapping child
+ name to an IFileNode or IDirectoryNode."""
+ return self._read()
+
+ def has_child(self, name):
+ """I return a Deferred that fires with a boolean, True if there
+ exists a child of the given name, False if not."""
+ d = self._read()
+ d.addCallback(lambda children: children.has_key(name))
+ return d
+
+ def get(self, name):
+ """I return a Deferred that fires with a specific named child node,
+ either an IFileNode or an IDirectoryNode."""
+ d = self._read()
+ d.addCallback(lambda children: children[name])
+ return d
+
+ def get_child_at_path(self, path):
+ """Transform a child path into an IDirectoryNode or IFileNode.
+
+ I perform a recursive series of 'get' operations to find the named
+ descendant node. I return a Deferred that fires with the node, or
+ errbacks with IndexError if the node could not be found.
+
+ The path can be either a single string (slash-separated) or a list of
+ path-name elements.
+ """
+
+ def set_uri(self, name, child_uri, metadata={}):
+ """I add a child (by URI) at the specific name. I return a Deferred
+ that fires when the operation finishes. I will replace any existing
+ child of the same name.
+
+ The child_uri could be for a file, or for a directory (either
+ read-write or read-only, using a URI that came from get_uri() ).
+
+ If this directory node is read-only, the Deferred will errback with a
+ NotMutableError."""
+ return self.set_node(name, self._create_node(child_uri), metadata)
+
+ def set_node(self, name, child, metadata={}):
+ """I add a child at the specific name. I return a Deferred that fires
+ when the operation finishes. This Deferred will fire with the child
+ node that was just added. I will replace any existing child of the
+ same name.
+
+ If this directory node is read-only, the Deferred will errback with a
+ NotMutableError."""
+ if self._node.is_readonly():
+ return defer.fail(NotMutableError())
+ d = self._read()
+ def _add(children):
+ children[name] = (child, metadata)
+ new_contents = self._pack_contents(children)
+ return self._node.replace(new_contents)
+ d.addCallback(_add)
+ d.addCallback(lambda res: None)
+ return d
+
+ def add_file(self, name, uploadable):
+ """I upload a file (using the given IUploadable), then attach the
+ resulting FileNode to the directory at the given name. I return a
+ Deferred that fires (with the IFileNode of the uploaded file) when
+ the operation completes."""
+
+ def delete(self, name):
+ """I remove the child at the specific name. I return a Deferred that
+ fires when the operation finishes."""
+
+ def create_empty_directory(self, name):
+ """I create and attach an empty directory at the given name. I return
+ a Deferred that fires when the operation finishes."""
+
+ def move_child_to(self, current_child_name, new_parent, new_child_name=None):
+ """I take one of my children and move them to a new parent. The child
+ is referenced by name. On the new parent, the child will live under
+ 'new_child_name', which defaults to 'current_child_name'. I return a
+ Deferred that fires when the operation finishes."""
+
+ def build_manifest(self):
+ """Return a frozenset of verifier-capability strings for all nodes
+ (directories and files) reachable from this one."""
+
+# use client.create_dirnode() to make one of these
+
--- /dev/null
+
+from twisted.trial import unittest
+from twisted.internet import defer
+
+from allmydata import mutable, uri
+from allmydata.mutable import split_netstring
+from allmydata.util.hashutil import netstring
+
+class Netstring(unittest.TestCase):
+ def test_split(self):
+ a = netstring("hello") + netstring("world")
+ self.failUnlessEqual(split_netstring(a, 2), ("hello", "world"))
+ self.failUnlessEqual(split_netstring(a, 2, False), ("hello", "world"))
+ self.failUnlessEqual(split_netstring(a, 2, True),
+ ("hello", "world", ""))
+ self.failUnlessRaises(ValueError, split_netstring, a+" extra", 2)
+ self.failUnlessRaises(ValueError, split_netstring, a+" extra", 2, False)
+
+ def test_extra(self):
+ a = netstring("hello")
+ self.failUnlessEqual(split_netstring(a, 1, True), ("hello", ""))
+ b = netstring("hello") + "extra stuff"
+ self.failUnlessEqual(split_netstring(b, 1, True),
+ ("hello", "extra stuff"))
+
+ def test_nested(self):
+ a = netstring("hello") + netstring("world") + "extra stuff"
+ b = netstring("a") + netstring("is") + netstring(a) + netstring(".")
+ top = split_netstring(b, 4)
+ self.failUnlessEqual(len(top), 4)
+ self.failUnlessEqual(top[0], "a")
+ self.failUnlessEqual(top[1], "is")
+ self.failUnlessEqual(top[2], a)
+ self.failUnlessEqual(top[3], ".")
+ self.failUnlessRaises(ValueError, split_netstring, a, 2)
+ self.failUnlessRaises(ValueError, split_netstring, a, 2, False)
+ bottom = split_netstring(a, 2, True)
+ self.failUnlessEqual(bottom, ("hello", "world", "extra stuff"))
+
+class FakeFilenode(mutable.MutableFileNode):
+ def init_from_uri(self, myuri):
+ self._uri = myuri
+ self.writekey = myuri.writekey
+ return self
+ def create(self, initial_contents):
+ self.contents = initial_contents
+ self.init_from_uri(uri.WriteableSSKFileURI("key", "fingerprint"))
+ return defer.succeed(None)
+ def download_to_data(self):
+ return defer.succeed(self.contents)
+ def replace(self, newdata):
+ self.contents = newdata
+ return defer.succeed(None)
+ def is_readonly(self):
+ return False
+ def get_readonly(self):
+ return "fake readonly"
+
+class FakeNewDirectoryNode(mutable.NewDirectoryNode):
+ filenode_class = FakeFilenode
+
+class MyClient:
+ def __init__(self):
+ pass
+
+ def create_empty_dirnode(self):
+ n = FakeNewDirectoryNode(self)
+ d = n.create()
+ d.addCallback(lambda res: n)
+ return d
+
+ def create_dirnode_from_uri(self, u):
+ return FakeNewDirectoryNode(self).init_from_uri(u)
+
+ def create_mutable_file(self, contents=""):
+ n = FakeFilenode(self)
+ d = n.create(contents)
+ d.addCallback(lambda res: n)
+ return d
+ def create_mutable_file_from_uri(self, u):
+ return FakeFilenode(self).init_from_uri(u)
+
+
+class Filenode(unittest.TestCase):
+ def setUp(self):
+ self.client = MyClient()
+
+ def test_create(self):
+ d = self.client.create_mutable_file()
+ def _created(n):
+ d = n.replace("contents 1")
+ d.addCallback(lambda res: self.failUnlessIdentical(res, None))
+ d.addCallback(lambda res: n.download_to_data())
+ d.addCallback(lambda res: self.failUnlessEqual(res, "contents 1"))
+ d.addCallback(lambda res: n.replace("contents 2"))
+ d.addCallback(lambda res: n.download_to_data())
+ d.addCallback(lambda res: self.failUnlessEqual(res, "contents 2"))
+ return d
+ d.addCallback(_created)
+ return d
+
+ def test_create_with_initial_contents(self):
+ d = self.client.create_mutable_file("contents 1")
+ def _created(n):
+ d = n.download_to_data()
+ d.addCallback(lambda res: self.failUnlessEqual(res, "contents 1"))
+ d.addCallback(lambda res: n.replace("contents 2"))
+ d.addCallback(lambda res: n.download_to_data())
+ d.addCallback(lambda res: self.failUnlessEqual(res, "contents 2"))
+ return d
+ d.addCallback(_created)
+ return d
+
+class Dirnode(unittest.TestCase):
+ def setUp(self):
+ self.client = MyClient()
+
+ def test_create(self):
+ d = self.client.create_empty_dirnode()
+ def _check(n):
+ self.failUnless(n.is_mutable())
+ u = n.get_uri()
+ self.failUnless(u)
+ self.failUnless(u.startswith("URI:DIR2:"), u)
+ u_ro = n.get_immutable_uri()
+ self.failUnless(u_ro.startswith("URI:DIR2-RO:"), u_ro)
+ u_v = n.get_verifier()
+ self.failUnless(u_v.startswith("URI:DIR2-Verifier:"), u_v)
+
+ d = n.list()
+ d.addCallback(lambda res: self.failUnlessEqual(res, {}))
+ d.addCallback(lambda res: n.has_child("missing"))
+ d.addCallback(lambda res: self.failIf(res))
+ fake_file_uri = uri.WriteableSSKFileURI("a"*16,"b"*32)
+ d.addCallback(lambda res: n.set_uri("child", fake_file_uri))
+ d.addCallback(lambda res: self.failUnlessEqual(res, None))
+ d.addCallback(lambda res: n.list())
+ def _check_list(children):
+ self.failUnless("child" in children)
+ d.addCallback(_check_list)
+
+ return d
+
+ d.addCallback(_check)
+
+ return d
+
from twisted.trial import unittest
from allmydata import uri
from allmydata.util import hashutil
-from allmydata.interfaces import IURI, IFileURI, IDirnodeURI, DirnodeURI
+from allmydata.interfaces import IURI, IFileURI, IDirnodeURI, DirnodeURI, \
+ IMutableFileURI, IVerifierURI
from foolscap.schema import Violation
class Literal(unittest.TestCase):
fileURI = 'URI:CHK:f3mf6az85wpcai8ma4qayfmxuc:nnw518w5hu3t5oohwtp7ah9n81z9rfg6c1ywk33ia3m64o67nsgo:3:10:345834'
self.failUnlessRaises(Violation, DirnodeURI.checkObject, fileURI, False)
+
+class Mutable(unittest.TestCase):
+ def test_pack(self):
+ writekey = "\x01" * 16
+ fingerprint = "\x02" * 32
+
+ u = uri.WriteableSSKFileURI(writekey, fingerprint)
+ self.failUnlessEqual(u.writekey, writekey)
+ self.failUnlessEqual(u.fingerprint, fingerprint)
+ self.failIf(u.is_readonly())
+ self.failUnless(u.is_mutable())
+ self.failUnless(IURI.providedBy(u))
+ self.failUnless(IMutableFileURI.providedBy(u))
+ self.failIf(IDirnodeURI.providedBy(u))
+
+ u2 = uri.from_string(u.to_string())
+ self.failUnlessEqual(u2.writekey, writekey)
+ self.failUnlessEqual(u2.fingerprint, fingerprint)
+ self.failIf(u2.is_readonly())
+ self.failUnless(u2.is_mutable())
+ self.failUnless(IURI.providedBy(u2))
+ self.failUnless(IMutableFileURI.providedBy(u2))
+ self.failIf(IDirnodeURI.providedBy(u2))
+
+ u3 = u2.get_readonly()
+ readkey = hashutil.ssk_readkey_hash(writekey)
+ self.failUnlessEqual(u3.fingerprint, fingerprint)
+ self.failUnlessEqual(u3.readkey, readkey)
+ self.failUnless(u3.is_readonly())
+ self.failUnless(u3.is_mutable())
+ self.failUnless(IURI.providedBy(u3))
+ self.failUnless(IMutableFileURI.providedBy(u3))
+ self.failIf(IDirnodeURI.providedBy(u3))
+
+ u4 = uri.ReadonlySSKFileURI(readkey, fingerprint)
+ self.failUnlessEqual(u4.fingerprint, fingerprint)
+ self.failUnlessEqual(u4.readkey, readkey)
+ self.failUnless(u4.is_readonly())
+ self.failUnless(u4.is_mutable())
+ self.failUnless(IURI.providedBy(u4))
+ self.failUnless(IMutableFileURI.providedBy(u4))
+ self.failIf(IDirnodeURI.providedBy(u4))
+
+ u5 = u4.get_verifier()
+ self.failUnless(IVerifierURI.providedBy(u5))
+ self.failUnlessEqual(u5.storage_index, u.storage_index)
+ u6 = IVerifierURI(u5.to_string())
+ self.failUnless(IVerifierURI.providedBy(u6))
+ self.failUnlessEqual(u6.storage_index, u.storage_index)
+ u7 = u.get_verifier()
+ self.failUnless(IVerifierURI.providedBy(u7))
+ self.failUnlessEqual(u7.storage_index, u.storage_index)
+
+
+class NewDirnode(unittest.TestCase):
+ def test_pack(self):
+ writekey = "\x01" * 16
+ fingerprint = "\x02" * 16
+
+ n = uri.WriteableSSKFileURI(writekey, fingerprint)
+ u1 = uri.NewDirectoryURI(n)
+ self.failIf(u1.is_readonly())
+ self.failUnless(u1.is_mutable())
+ self.failUnless(IURI.providedBy(u1))
+ self.failIf(IFileURI.providedBy(u1))
+ self.failUnless(IDirnodeURI.providedBy(u1))
+
+ u2 = uri.from_string(u1.to_string())
+ self.failUnlessEqual(u1.to_string(), u2.to_string())
+ self.failIf(u2.is_readonly())
+ self.failUnless(u2.is_mutable())
+ self.failUnless(IURI.providedBy(u2))
+ self.failIf(IFileURI.providedBy(u2))
+ self.failUnless(IDirnodeURI.providedBy(u2))
+
+ u3 = u2.get_readonly()
+ self.failUnless(u3.is_readonly())
+ self.failUnless(u3.is_mutable())
+ self.failUnless(IURI.providedBy(u3))
+ self.failIf(IFileURI.providedBy(u3))
+ self.failUnless(IDirnodeURI.providedBy(u3))
+ u3n = u3._filenode_uri
+ self.failUnless(u3n.is_readonly())
+ self.failUnless(u3n.is_mutable())
+
+ u4 = uri.ReadonlyNewDirectoryURI(u2._filenode_uri.get_readonly())
+ self.failUnlessEqual(u4.to_string(), u3.to_string())
+ self.failUnless(u4.is_readonly())
+ self.failUnless(u4.is_mutable())
+ self.failUnless(IURI.providedBy(u4))
+ self.failIf(IFileURI.providedBy(u4))
+ self.failUnless(IDirnodeURI.providedBy(u4))
+
+ verifiers = [u1.get_verifier(), u2.get_verifier(),
+ u3.get_verifier(), u4.get_verifier(),
+ IVerifierURI(u1.get_verifier().to_string()),
+ uri.NewDirectoryURIVerifier(n.get_verifier()),
+ uri.NewDirectoryURIVerifier(n.get_verifier().to_string()),
+ ]
+ for v in verifiers:
+ self.failUnless(IVerifierURI.providedBy(v))
+ self.failUnlessEqual(v._filenode_uri,
+ u1.get_verifier()._filenode_uri)
+
+
from zope.interface import implements
from twisted.python.components import registerAdapter
from allmydata.util import idlib, hashutil
-from allmydata.interfaces import IURI, IDirnodeURI, IFileURI, IVerifierURI
+from allmydata.interfaces import IURI, IDirnodeURI, IFileURI, IVerifierURI, \
+ IMutableFileURI
# the URI shall be an ascii representation of the file. It shall contain
# enough information to retrieve and validate the contents. It shall be
def get_size(self):
return len(self.data)
+class WriteableSSKFileURI(_BaseURI):
+ implements(IURI, IMutableFileURI)
+
+ def __init__(self, *args, **kwargs):
+ if not args and not kwargs:
+ return
+ self.populate(*args, **kwargs)
+
+ def populate(self, writekey, fingerprint):
+ self.writekey = writekey
+ self.readkey = hashutil.ssk_readkey_hash(writekey)
+ self.storage_index = hashutil.ssk_storage_index_hash(self.readkey)
+ self.fingerprint = fingerprint
+
+ def init_from_string(self, uri):
+ assert uri.startswith("URI:SSK:"), uri
+ (header_uri, header_ssk, writekey_s, fingerprint_s) = uri.split(":")
+ self.populate(idlib.a2b(writekey_s), idlib.a2b(fingerprint_s))
+ return self
+
+ def to_string(self):
+ assert isinstance(self.writekey, str)
+ assert isinstance(self.fingerprint, str)
+ return "URI:SSK:%s:%s" % (idlib.b2a(self.writekey),
+ idlib.b2a(self.fingerprint))
+
+ def is_readonly(self):
+ return False
+ def is_mutable(self):
+ return True
+ def get_readonly(self):
+ return ReadonlySSKFileURI(self.readkey, self.fingerprint)
+ def get_verifier(self):
+ return SSKVerifierURI(self.storage_index, self.fingerprint)
+
+class ReadonlySSKFileURI(_BaseURI):
+ implements(IURI, IMutableFileURI)
+
+ def __init__(self, *args, **kwargs):
+ if not args and not kwargs:
+ return
+ self.populate(*args, **kwargs)
+
+ def populate(self, readkey, fingerprint):
+ self.readkey = readkey
+ self.storage_index = hashutil.ssk_storage_index_hash(self.readkey)
+ self.fingerprint = fingerprint
+
+ def init_from_string(self, uri):
+ assert uri.startswith("URI:SSK-RO:"), uri
+ (header_uri, header_ssk, readkey_s, fingerprint_s) = uri.split(":")
+ self.populate(idlib.a2b(readkey_s), idlib.a2b(fingerprint_s))
+ return self
+
+ def to_string(self):
+ assert isinstance(self.readkey, str)
+ assert isinstance(self.fingerprint, str)
+ return "URI:SSK-RO:%s:%s" % (idlib.b2a(self.readkey),
+ idlib.b2a(self.fingerprint))
+
+ def is_readonly(self):
+ return True
+ def is_mutable(self):
+ return True
+ def get_readonly(self):
+ return self
+ def get_verifier(self):
+ return SSKVerifierURI(self.storage_index, self.fingerprint)
+
+class SSKVerifierURI(_BaseURI):
+ implements(IVerifierURI)
+
+ def __init__(self, *args, **kwargs):
+ if not args and not kwargs:
+ return
+ self.populate(*args, **kwargs)
+
+ def populate(self, storage_index, fingerprint):
+ self.storage_index = storage_index
+ self.fingerprint = fingerprint
+
+ def init_from_string(self, uri):
+ assert uri.startswith("URI:SSK-Verifier:"), uri
+ (header_uri, header_ssk,
+ storage_index_s, fingerprint_s) = uri.split(":")
+ self.populate(idlib.a2b(storage_index_s), idlib.a2b(fingerprint_s))
+ return self
+
+ def to_string(self):
+ assert isinstance(self.storage_index, str)
+ assert isinstance(self.fingerprint, str)
+ return "URI:SSK-Verifier:%s:%s" % (idlib.b2a(self.storage_index),
+ idlib.b2a(self.fingerprint))
+
+class NewDirectoryURI(_BaseURI):
+ implements(IURI, IDirnodeURI)
+
+ def __init__(self, filenode_uri=None):
+ if filenode_uri:
+ assert not filenode_uri.is_readonly()
+ self._filenode_uri = filenode_uri
+
+ def init_from_string(self, uri):
+ assert uri.startswith("URI:DIR2:")
+ (header_uri, header_dir2, bits) = uri.split(":", 2)
+ fn = WriteableSSKFileURI()
+ fn.init_from_string("URI:SSK:" + bits)
+ self._filenode_uri = fn
+ return self
+
+ def to_string(self):
+ assert isinstance(self._filenode_uri, WriteableSSKFileURI)
+ fn_u = self._filenode_uri.to_string()
+ (header_uri, header_ssk, bits) = fn_u.split(":", 2)
+ return "URI:DIR2:" + bits
+
+ def is_readonly(self):
+ return False
+ def is_mutable(self):
+ return True
+ def get_readonly(self):
+ return ReadonlyNewDirectoryURI(self._filenode_uri.get_readonly())
+ def get_verifier(self):
+ return NewDirectoryURIVerifier(self._filenode_uri.get_verifier())
+
+class ReadonlyNewDirectoryURI(_BaseURI):
+ implements(IURI, IDirnodeURI)
+
+ def __init__(self, filenode_uri=None):
+ if filenode_uri:
+ assert filenode_uri.is_readonly()
+ self._filenode_uri = filenode_uri
+
+ def init_from_string(self, uri):
+ assert uri.startswith("URI:DIR2-RO:")
+ (header_uri, header_dir2, bits) = uri.split(":", 2)
+ fn = ReadonlySSKFileURI()
+ fn.init_from_string("URI:SSK-RO:" + bits)
+ self._filenode_uri = fn
+ return self
+
+ def to_string(self):
+ assert isinstance(self._filenode_uri, ReadonlySSKFileURI)
+ fn_u = self._filenode_uri.to_string()
+ (header_uri, header_ssk, bits) = fn_u.split(":", 2)
+ return "URI:DIR2-RO:" + bits
+
+ def is_readonly(self):
+ return True
+ def is_mutable(self):
+ return True
+ def get_readonly(self):
+ return self
+ def get_verifier(self):
+ return NewDirectoryURIVerifier(self._filenode_uri.get_verifier())
+
+class NewDirectoryURIVerifier(_BaseURI):
+ implements(IVerifierURI)
+
+ def __init__(self, filenode_uri=None):
+ if filenode_uri:
+ filenode_uri = IVerifierURI(filenode_uri)
+ self._filenode_uri = filenode_uri
+
+ def init_from_string(self, uri):
+ assert uri.startswith("URI:DIR2-Verifier:")
+ (header_uri, header_dir2, bits) = uri.split(":", 2)
+ fn = SSKVerifierURI()
+ fn.init_from_string("URI:SSK-Verifier:" + bits)
+ self._filenode_uri = fn
+ return self
+
+ def to_string(self):
+ assert isinstance(self._filenode_uri, SSKVerifierURI)
+ fn_u = self._filenode_uri.to_string()
+ (header_uri, header_ssk, bits) = fn_u.split(":", 2)
+ return "URI:DIR2-Verifier:" + bits
+
+
+
class DirnodeURI(_BaseURI):
implements(IURI, IDirnodeURI)
return ReadOnlyDirnodeURI().init_from_string(s)
elif s.startswith("URI:DIR-Verifier:"):
return DirnodeVerifierURI().init_from_string(s)
+ elif s.startswith("URI:SSK:"):
+ return WriteableSSKFileURI().init_from_string(s)
+ elif s.startswith("URI:SSK-RO:"):
+ return ReadonlySSKFileURI().init_from_string(s)
+ elif s.startswith("URI:SSK-Verifier:"):
+ return SSKVerifierURI().init_from_string(s)
+ elif s.startswith("URI:DIR2:"):
+ return NewDirectoryURI().init_from_string(s)
+ elif s.startswith("URI:DIR2-RO:"):
+ return ReadonlyNewDirectoryURI().init_from_string(s)
+ elif s.startswith("URI:DIR2-Verifier:"):
+ return NewDirectoryURIVerifier().init_from_string(s)
else:
- raise TypeError("unknown URI type: %s.." % s[:10])
+ raise TypeError("unknown URI type: %s.." % s[:12])
registerAdapter(from_string, str, IURI)
registerAdapter(from_string_filenode, str, IFileURI)
+def from_string_mutable_filenode(s):
+ u = from_string(s)
+ assert IMutableFileURI.providedBy(u)
+ return u
+registerAdapter(from_string_mutable_filenode, str, IMutableFileURI)
+
def from_string_verifier(s):
u = from_string(s)
assert IVerifierURI.providedBy(u)
h1 = SHA256.new(ikey + data).digest()
h2 = SHA256.new(okey + h1).digest()
return h2
+
+def mutable_rwcap_key_hash(iv, writekey):
+ return tagged_pair_hash("allmydata_mutable_rwcap_key_v1", iv, writekey)
+def ssk_writekey_hash(privkey):
+ return tagged_hash("allmydata_mutable_writekey_v1", privkey)
+def ssk_pubkey_fingerprint_hash(pubkey):
+ return tagged_hash("allmydata_mutable_pubkey_v1", pubkey)
+
+def ssk_readkey_hash(writekey):
+ return tagged_hash("allmydata_mutable_readkey_v1", writekey)
+def ssk_storage_index_hash(readkey):
+ return tagged_hash("allmydata_mutable_storage_index_v1", readkey)
projects / tahoe-lafs / tahoe-lafs.git / commitdiff