from allmydata import codec, hashtree, storage, uri
from allmydata.interfaces import IDownloadTarget, IDownloader, IFileURI, \
IDownloadStatus, IDownloadResults
+from allmydata.immutable import layout
from allmydata.immutable.encode import NotEnoughSharesError
from pycryptopp.cipher.aes import AES
(self._responses_received,
self._queries_sent))
for sharenum, bucket in buckets.iteritems():
- b = storage.ReadBucketProxy(bucket, peerid, self._si_s)
+ b = layout.ReadBucketProxy(bucket, peerid, self._si_s)
self.add_share_bucket(sharenum, b)
self._uri_extension_sources.append(b)
if self._results:
--- /dev/null
+
+import struct
+from zope.interface import implements
+from twisted.internet import defer
+from allmydata.interfaces import IStorageBucketWriter, IStorageBucketReader, \
+ FileTooLargeError, HASH_SIZE
+from allmydata.util import mathutil, idlib
+from allmydata.util.assertutil import _assert, precondition
+
+
+"""
+Share data is written into a single file. At the start of the file, there is
+a series of four-byte big-endian offset values, which indicate where each
+section starts. Each offset is measured from the beginning of the file.
+
+0x00: version number (=00 00 00 01)
+0x04: segment size
+0x08: data size
+0x0c: offset of data (=00 00 00 24)
+0x10: offset of plaintext_hash_tree
+0x14: offset of crypttext_hash_tree
+0x18: offset of block_hashes
+0x1c: offset of share_hashes
+0x20: offset of uri_extension_length + uri_extension
+0x24: start of data
+? : start of plaintext_hash_tree
+? : start of crypttext_hash_tree
+? : start of block_hashes
+? : start of share_hashes
+ each share_hash is written as a two-byte (big-endian) hashnum
+ followed by the 32-byte SHA-256 hash. We only store the hashes
+ necessary to validate the share hash root
+? : start of uri_extension_length (four-byte big-endian value)
+? : start of uri_extension
+"""
+
+def allocated_size(data_size, num_segments, num_share_hashes,
+ uri_extension_size):
+ wbp = WriteBucketProxy(None, data_size, 0, num_segments, num_share_hashes,
+ uri_extension_size, None)
+ uri_extension_starts_at = wbp._offsets['uri_extension']
+ return uri_extension_starts_at + 4 + uri_extension_size
+
+class WriteBucketProxy:
+ implements(IStorageBucketWriter)
+ def __init__(self, rref, data_size, segment_size, num_segments,
+ num_share_hashes, uri_extension_size, nodeid):
+ self._rref = rref
+ self._data_size = data_size
+ self._segment_size = segment_size
+ self._num_segments = num_segments
+ self._nodeid = nodeid
+
+ if segment_size >= 2**32 or data_size >= 2**32:
+ raise FileTooLargeError("This file is too large to be uploaded (data_size).")
+
+ effective_segments = mathutil.next_power_of_k(num_segments,2)
+ self._segment_hash_size = (2*effective_segments - 1) * HASH_SIZE
+ # how many share hashes are included in each share? This will be
+ # about ln2(num_shares).
+ self._share_hash_size = num_share_hashes * (2+HASH_SIZE)
+ # we commit to not sending a uri extension larger than this
+ self._uri_extension_size = uri_extension_size
+
+ offsets = self._offsets = {}
+ x = 0x24
+ offsets['data'] = x
+ x += data_size
+ offsets['plaintext_hash_tree'] = x
+ x += self._segment_hash_size
+ offsets['crypttext_hash_tree'] = x
+ x += self._segment_hash_size
+ offsets['block_hashes'] = x
+ x += self._segment_hash_size
+ offsets['share_hashes'] = x
+ x += self._share_hash_size
+ offsets['uri_extension'] = x
+
+ if x >= 2**32:
+ raise FileTooLargeError("This file is too large to be uploaded (offsets).")
+
+ offset_data = struct.pack(">LLLLLLLLL",
+ 1, # version number
+ segment_size,
+ data_size,
+ offsets['data'],
+ offsets['plaintext_hash_tree'],
+ offsets['crypttext_hash_tree'],
+ offsets['block_hashes'],
+ offsets['share_hashes'],
+ offsets['uri_extension'],
+ )
+ assert len(offset_data) == 0x24
+ self._offset_data = offset_data
+
+ def __repr__(self):
+ if self._nodeid:
+ nodeid_s = idlib.nodeid_b2a(self._nodeid)
+ else:
+ nodeid_s = "[None]"
+ return "<allmydata.storage.WriteBucketProxy for node %s>" % nodeid_s
+
+ def start(self):
+ return self._write(0, self._offset_data)
+
+ def put_block(self, segmentnum, data):
+ offset = self._offsets['data'] + segmentnum * self._segment_size
+ assert offset + len(data) <= self._offsets['uri_extension']
+ assert isinstance(data, str)
+ if segmentnum < self._num_segments-1:
+ precondition(len(data) == self._segment_size,
+ len(data), self._segment_size)
+ else:
+ precondition(len(data) == (self._data_size -
+ (self._segment_size *
+ (self._num_segments - 1))),
+ len(data), self._segment_size)
+ return self._write(offset, data)
+
+ def put_plaintext_hashes(self, hashes):
+ offset = self._offsets['plaintext_hash_tree']
+ assert isinstance(hashes, list)
+ data = "".join(hashes)
+ precondition(len(data) == self._segment_hash_size,
+ len(data), self._segment_hash_size)
+ precondition(offset+len(data) <= self._offsets['crypttext_hash_tree'],
+ offset, len(data), offset+len(data),
+ self._offsets['crypttext_hash_tree'])
+ return self._write(offset, data)
+
+ def put_crypttext_hashes(self, hashes):
+ offset = self._offsets['crypttext_hash_tree']
+ assert isinstance(hashes, list)
+ data = "".join(hashes)
+ precondition(len(data) == self._segment_hash_size,
+ len(data), self._segment_hash_size)
+ precondition(offset + len(data) <= self._offsets['block_hashes'],
+ offset, len(data), offset+len(data),
+ self._offsets['block_hashes'])
+ return self._write(offset, data)
+
+ def put_block_hashes(self, blockhashes):
+ offset = self._offsets['block_hashes']
+ assert isinstance(blockhashes, list)
+ data = "".join(blockhashes)
+ precondition(len(data) == self._segment_hash_size,
+ len(data), self._segment_hash_size)
+ precondition(offset + len(data) <= self._offsets['share_hashes'],
+ offset, len(data), offset+len(data),
+ self._offsets['share_hashes'])
+ return self._write(offset, data)
+
+ def put_share_hashes(self, sharehashes):
+ # sharehashes is a list of (index, hash) tuples, so they get stored
+ # as 2+32=34 bytes each
+ offset = self._offsets['share_hashes']
+ assert isinstance(sharehashes, list)
+ data = "".join([struct.pack(">H", hashnum) + hashvalue
+ for hashnum,hashvalue in sharehashes])
+ precondition(len(data) == self._share_hash_size,
+ len(data), self._share_hash_size)
+ precondition(offset + len(data) <= self._offsets['uri_extension'],
+ offset, len(data), offset+len(data),
+ self._offsets['uri_extension'])
+ return self._write(offset, data)
+
+ def put_uri_extension(self, data):
+ offset = self._offsets['uri_extension']
+ assert isinstance(data, str)
+ precondition(len(data) <= self._uri_extension_size,
+ len(data), self._uri_extension_size)
+ length = struct.pack(">L", len(data))
+ return self._write(offset, length+data)
+
+ def _write(self, offset, data):
+ # TODO: for small shares, buffer the writes and do just a single call
+ return self._rref.callRemote("write", offset, data)
+
+ def close(self):
+ return self._rref.callRemote("close")
+
+ def abort(self):
+ return self._rref.callRemoteOnly("abort")
+
+class ReadBucketProxy:
+ implements(IStorageBucketReader)
+ def __init__(self, rref, peerid=None, storage_index_s=None):
+ self._rref = rref
+ self._peerid = peerid
+ self._si_s = storage_index_s
+ self._started = False
+
+ def get_peerid(self):
+ return self._peerid
+
+ def __repr__(self):
+ peerid_s = idlib.shortnodeid_b2a(self._peerid)
+ return "<ReadBucketProxy to peer [%s] SI %s>" % (peerid_s,
+ self._si_s)
+
+ def startIfNecessary(self):
+ if self._started:
+ return defer.succeed(self)
+ d = self.start()
+ d.addCallback(lambda res: self)
+ return d
+
+ def start(self):
+ # TODO: for small shares, read the whole bucket in start()
+ d = self._read(0, 0x24)
+ d.addCallback(self._parse_offsets)
+ def _started(res):
+ self._started = True
+ return res
+ d.addCallback(_started)
+ return d
+
+ def _parse_offsets(self, data):
+ precondition(len(data) == 0x24)
+ self._offsets = {}
+ (version, self._segment_size, self._data_size) = \
+ struct.unpack(">LLL", data[0:0xc])
+ _assert(version == 1)
+ x = 0x0c
+ for field in ( 'data',
+ 'plaintext_hash_tree',
+ 'crypttext_hash_tree',
+ 'block_hashes',
+ 'share_hashes',
+ 'uri_extension',
+ ):
+ offset = struct.unpack(">L", data[x:x+4])[0]
+ x += 4
+ self._offsets[field] = offset
+ return self._offsets
+
+ def get_block(self, blocknum):
+ num_segments = mathutil.div_ceil(self._data_size, self._segment_size)
+ if blocknum < num_segments-1:
+ size = self._segment_size
+ else:
+ size = self._data_size % self._segment_size
+ if size == 0:
+ size = self._segment_size
+ offset = self._offsets['data'] + blocknum * self._segment_size
+ return self._read(offset, size)
+
+ def _str2l(self, s):
+ """ split string (pulled from storage) into a list of blockids """
+ return [ s[i:i+HASH_SIZE]
+ for i in range(0, len(s), HASH_SIZE) ]
+
+ def get_plaintext_hashes(self):
+ offset = self._offsets['plaintext_hash_tree']
+ size = self._offsets['crypttext_hash_tree'] - offset
+ d = self._read(offset, size)
+ d.addCallback(self._str2l)
+ return d
+
+ def get_crypttext_hashes(self):
+ offset = self._offsets['crypttext_hash_tree']
+ size = self._offsets['block_hashes'] - offset
+ d = self._read(offset, size)
+ d.addCallback(self._str2l)
+ return d
+
+ def get_block_hashes(self):
+ offset = self._offsets['block_hashes']
+ size = self._offsets['share_hashes'] - offset
+ d = self._read(offset, size)
+ d.addCallback(self._str2l)
+ return d
+
+ def get_share_hashes(self):
+ offset = self._offsets['share_hashes']
+ size = self._offsets['uri_extension'] - offset
+ assert size % (2+HASH_SIZE) == 0
+ d = self._read(offset, size)
+ def _unpack_share_hashes(data):
+ assert len(data) == size
+ hashes = []
+ for i in range(0, size, 2+HASH_SIZE):
+ hashnum = struct.unpack(">H", data[i:i+2])[0]
+ hashvalue = data[i+2:i+2+HASH_SIZE]
+ hashes.append( (hashnum, hashvalue) )
+ return hashes
+ d.addCallback(_unpack_share_hashes)
+ return d
+
+ def get_uri_extension(self):
+ offset = self._offsets['uri_extension']
+ d = self._read(offset, 4)
+ def _got_length(data):
+ length = struct.unpack(">L", data)[0]
+ return self._read(offset+4, length)
+ d.addCallback(_got_length)
+ return d
+
+ def _read(self, offset, length):
+ return self._rref.callRemote("read", offset, length)
+
from allmydata.util.assertutil import precondition
from allmydata.interfaces import IUploadable, IUploader, IUploadResults, \
IEncryptedUploadable, RIEncryptedUploadable, IUploadStatus
+from allmydata.immutable import layout
from pycryptopp.cipher.aes import AES
from cStringIO import StringIO
self._storageserver = storage_server # to an RIStorageServer
self.buckets = {} # k: shareid, v: IRemoteBucketWriter
self.sharesize = sharesize
- self.allocated_size = storage.allocated_size(sharesize,
- num_segments,
- num_share_hashes,
- EXTENSION_SIZE)
+ self.allocated_size = layout.allocated_size(sharesize,
+ num_segments,
+ num_share_hashes,
+ EXTENSION_SIZE)
self.blocksize = blocksize
self.num_segments = num_segments
#log.msg("%s._got_reply(%s)" % (self, (alreadygot, buckets)))
b = {}
for sharenum, rref in buckets.iteritems():
- bp = storage.WriteBucketProxy(rref, self.sharesize,
- self.blocksize,
- self.num_segments,
- self.num_share_hashes,
- EXTENSION_SIZE,
- self.peerid)
+ bp = layout.WriteBucketProxy(rref, self.sharesize,
+ self.blocksize,
+ self.num_segments,
+ self.num_share_hashes,
+ EXTENSION_SIZE,
+ self.peerid)
b[sharenum] = bp
self.buckets.update(b)
return (alreadygot, set(b.keys()))
from foolscap.eventual import eventually
from allmydata import interfaces, storage, uri
from allmydata.immutable import upload
+from allmydata.immutable.layout import ReadBucketProxy
from allmydata.util import idlib, log, observer, fileutil, hashutil
self.log("no readers, so no UEB", level=log.NOISY)
return
b,peerid = self._readers.pop()
- rbp = storage.ReadBucketProxy(b, peerid,
- storage.si_b2a(self._storage_index))
+ rbp = ReadBucketProxy(b, peerid, storage.si_b2a(self._storage_index))
d = rbp.startIfNecessary()
d.addCallback(lambda res: rbp.get_uri_extension())
d.addCallback(self._got_uri_extension)
def dump_immutable_share(options):
from allmydata import uri, storage
from allmydata.util import base32
+ from allmydata.immutable.layout import ReadBucketProxy
out = options.stdout
f = storage.ShareFile(options['filename'])
# use a ReadBucketProxy to parse the bucket and find the uri extension
- bp = storage.ReadBucketProxy(None)
+ bp = ReadBucketProxy(None)
offsets = bp._parse_offsets(f.read_share_data(0, 0x24))
seek = offsets['uri_extension']
length = struct.unpack(">L", f.read_share_data(seek, 4))[0]
from allmydata import uri, storage
from allmydata.mutable.layout import unpack_share
from allmydata.mutable.common import NeedMoreDataError
+ from allmydata.immutable.layout import ReadBucketProxy
from allmydata.util import base32
import struct
sf = storage.ShareFile(abs_sharefile)
# use a ReadBucketProxy to parse the bucket and find the uri extension
- bp = storage.ReadBucketProxy(None)
+ bp = ReadBucketProxy(None)
offsets = bp._parse_offsets(sf.read_share_data(0, 0x24))
seek = offsets['uri_extension']
length = struct.unpack(">L", sf.read_share_data(seek, 4))[0]
else:
# otherwise assume it's immutable
f = storage.ShareFile(fn)
- bp = storage.ReadBucketProxy(None)
+ bp = ReadBucketProxy(None)
offsets = bp._parse_offsets(f.read_share_data(0, 0x24))
start = f._data_offset + offsets["data"]
end = f._data_offset + offsets["plaintext_hash_tree"]
from foolscap import Referenceable
from twisted.application import service
-from twisted.internet import defer
from zope.interface import implements
from allmydata.interfaces import RIStorageServer, RIBucketWriter, \
- RIBucketReader, IStorageBucketWriter, IStorageBucketReader, HASH_SIZE, \
- BadWriteEnablerError, IStatsProducer, FileTooLargeError
-from allmydata.util import base32, fileutil, idlib, mathutil, log
-from allmydata.util.assertutil import precondition, _assert
+ RIBucketReader, BadWriteEnablerError, IStatsProducer
+from allmydata.util import base32, fileutil, idlib, log
+from allmydata.util.assertutil import precondition
import allmydata # for __version__
class DataTooLargeError(Exception):
# 0x00: share file version number, four bytes, current version is 1
# 0x04: share data length, four bytes big-endian = A
# 0x08: number of leases, four bytes big-endian
-# 0x0c: beginning of share data (described below, at WriteBucketProxy)
+# 0x0c: beginning of share data (see immutable.layout.WriteBucketProxy)
# A+0x0c = B: first lease. Lease format is:
# B+0x00: owner number, 4 bytes big-endian, 0 is reserved for no-owner
# B+0x04: renew secret, 32 bytes (SHA256)
# the code before here runs on the storage server, not the client
-# the code beyond here runs on the client, not the storage server
-
-"""
-Share data is written into a single file. At the start of the file, there is
-a series of four-byte big-endian offset values, which indicate where each
-section starts. Each offset is measured from the beginning of the file.
-
-0x00: version number (=00 00 00 01)
-0x04: segment size
-0x08: data size
-0x0c: offset of data (=00 00 00 24)
-0x10: offset of plaintext_hash_tree
-0x14: offset of crypttext_hash_tree
-0x18: offset of block_hashes
-0x1c: offset of share_hashes
-0x20: offset of uri_extension_length + uri_extension
-0x24: start of data
-? : start of plaintext_hash_tree
-? : start of crypttext_hash_tree
-? : start of block_hashes
-? : start of share_hashes
- each share_hash is written as a two-byte (big-endian) hashnum
- followed by the 32-byte SHA-256 hash. We only store the hashes
- necessary to validate the share hash root
-? : start of uri_extension_length (four-byte big-endian value)
-? : start of uri_extension
-"""
-
-def allocated_size(data_size, num_segments, num_share_hashes,
- uri_extension_size):
- wbp = WriteBucketProxy(None, data_size, 0, num_segments, num_share_hashes,
- uri_extension_size, None)
- uri_extension_starts_at = wbp._offsets['uri_extension']
- return uri_extension_starts_at + 4 + uri_extension_size
-
-class WriteBucketProxy:
- implements(IStorageBucketWriter)
- def __init__(self, rref, data_size, segment_size, num_segments,
- num_share_hashes, uri_extension_size, nodeid):
- self._rref = rref
- self._data_size = data_size
- self._segment_size = segment_size
- self._num_segments = num_segments
- self._nodeid = nodeid
-
- if segment_size >= 2**32 or data_size >= 2**32:
- raise FileTooLargeError("This file is too large to be uploaded (data_size).")
-
- effective_segments = mathutil.next_power_of_k(num_segments,2)
- self._segment_hash_size = (2*effective_segments - 1) * HASH_SIZE
- # how many share hashes are included in each share? This will be
- # about ln2(num_shares).
- self._share_hash_size = num_share_hashes * (2+HASH_SIZE)
- # we commit to not sending a uri extension larger than this
- self._uri_extension_size = uri_extension_size
-
- offsets = self._offsets = {}
- x = 0x24
- offsets['data'] = x
- x += data_size
- offsets['plaintext_hash_tree'] = x
- x += self._segment_hash_size
- offsets['crypttext_hash_tree'] = x
- x += self._segment_hash_size
- offsets['block_hashes'] = x
- x += self._segment_hash_size
- offsets['share_hashes'] = x
- x += self._share_hash_size
- offsets['uri_extension'] = x
-
- if x >= 2**32:
- raise FileTooLargeError("This file is too large to be uploaded (offsets).")
-
- offset_data = struct.pack(">LLLLLLLLL",
- 1, # version number
- segment_size,
- data_size,
- offsets['data'],
- offsets['plaintext_hash_tree'],
- offsets['crypttext_hash_tree'],
- offsets['block_hashes'],
- offsets['share_hashes'],
- offsets['uri_extension'],
- )
- assert len(offset_data) == 0x24
- self._offset_data = offset_data
-
- def __repr__(self):
- if self._nodeid:
- nodeid_s = idlib.nodeid_b2a(self._nodeid)
- else:
- nodeid_s = "[None]"
- return "<allmydata.storage.WriteBucketProxy for node %s>" % nodeid_s
-
- def start(self):
- return self._write(0, self._offset_data)
-
- def put_block(self, segmentnum, data):
- offset = self._offsets['data'] + segmentnum * self._segment_size
- assert offset + len(data) <= self._offsets['uri_extension']
- assert isinstance(data, str)
- if segmentnum < self._num_segments-1:
- precondition(len(data) == self._segment_size,
- len(data), self._segment_size)
- else:
- precondition(len(data) == (self._data_size -
- (self._segment_size *
- (self._num_segments - 1))),
- len(data), self._segment_size)
- return self._write(offset, data)
-
- def put_plaintext_hashes(self, hashes):
- offset = self._offsets['plaintext_hash_tree']
- assert isinstance(hashes, list)
- data = "".join(hashes)
- precondition(len(data) == self._segment_hash_size,
- len(data), self._segment_hash_size)
- precondition(offset+len(data) <= self._offsets['crypttext_hash_tree'],
- offset, len(data), offset+len(data),
- self._offsets['crypttext_hash_tree'])
- return self._write(offset, data)
-
- def put_crypttext_hashes(self, hashes):
- offset = self._offsets['crypttext_hash_tree']
- assert isinstance(hashes, list)
- data = "".join(hashes)
- precondition(len(data) == self._segment_hash_size,
- len(data), self._segment_hash_size)
- precondition(offset + len(data) <= self._offsets['block_hashes'],
- offset, len(data), offset+len(data),
- self._offsets['block_hashes'])
- return self._write(offset, data)
-
- def put_block_hashes(self, blockhashes):
- offset = self._offsets['block_hashes']
- assert isinstance(blockhashes, list)
- data = "".join(blockhashes)
- precondition(len(data) == self._segment_hash_size,
- len(data), self._segment_hash_size)
- precondition(offset + len(data) <= self._offsets['share_hashes'],
- offset, len(data), offset+len(data),
- self._offsets['share_hashes'])
- return self._write(offset, data)
-
- def put_share_hashes(self, sharehashes):
- # sharehashes is a list of (index, hash) tuples, so they get stored
- # as 2+32=34 bytes each
- offset = self._offsets['share_hashes']
- assert isinstance(sharehashes, list)
- data = "".join([struct.pack(">H", hashnum) + hashvalue
- for hashnum,hashvalue in sharehashes])
- precondition(len(data) == self._share_hash_size,
- len(data), self._share_hash_size)
- precondition(offset + len(data) <= self._offsets['uri_extension'],
- offset, len(data), offset+len(data),
- self._offsets['uri_extension'])
- return self._write(offset, data)
-
- def put_uri_extension(self, data):
- offset = self._offsets['uri_extension']
- assert isinstance(data, str)
- precondition(len(data) <= self._uri_extension_size,
- len(data), self._uri_extension_size)
- length = struct.pack(">L", len(data))
- return self._write(offset, length+data)
-
- def _write(self, offset, data):
- # TODO: for small shares, buffer the writes and do just a single call
- return self._rref.callRemote("write", offset, data)
-
- def close(self):
- return self._rref.callRemote("close")
-
- def abort(self):
- return self._rref.callRemoteOnly("abort")
-
-class ReadBucketProxy:
- implements(IStorageBucketReader)
- def __init__(self, rref, peerid=None, storage_index_s=None):
- self._rref = rref
- self._peerid = peerid
- self._si_s = storage_index_s
- self._started = False
-
- def get_peerid(self):
- return self._peerid
-
- def __repr__(self):
- peerid_s = idlib.shortnodeid_b2a(self._peerid)
- return "<ReadBucketProxy to peer [%s] SI %s>" % (peerid_s,
- self._si_s)
-
- def startIfNecessary(self):
- if self._started:
- return defer.succeed(self)
- d = self.start()
- d.addCallback(lambda res: self)
- return d
-
- def start(self):
- # TODO: for small shares, read the whole bucket in start()
- d = self._read(0, 0x24)
- d.addCallback(self._parse_offsets)
- def _started(res):
- self._started = True
- return res
- d.addCallback(_started)
- return d
-
- def _parse_offsets(self, data):
- precondition(len(data) == 0x24)
- self._offsets = {}
- (version, self._segment_size, self._data_size) = \
- struct.unpack(">LLL", data[0:0xc])
- _assert(version == 1)
- x = 0x0c
- for field in ( 'data',
- 'plaintext_hash_tree',
- 'crypttext_hash_tree',
- 'block_hashes',
- 'share_hashes',
- 'uri_extension',
- ):
- offset = struct.unpack(">L", data[x:x+4])[0]
- x += 4
- self._offsets[field] = offset
- return self._offsets
-
- def get_block(self, blocknum):
- num_segments = mathutil.div_ceil(self._data_size, self._segment_size)
- if blocknum < num_segments-1:
- size = self._segment_size
- else:
- size = self._data_size % self._segment_size
- if size == 0:
- size = self._segment_size
- offset = self._offsets['data'] + blocknum * self._segment_size
- return self._read(offset, size)
-
- def _str2l(self, s):
- """ split string (pulled from storage) into a list of blockids """
- return [ s[i:i+HASH_SIZE]
- for i in range(0, len(s), HASH_SIZE) ]
-
- def get_plaintext_hashes(self):
- offset = self._offsets['plaintext_hash_tree']
- size = self._offsets['crypttext_hash_tree'] - offset
- d = self._read(offset, size)
- d.addCallback(self._str2l)
- return d
-
- def get_crypttext_hashes(self):
- offset = self._offsets['crypttext_hash_tree']
- size = self._offsets['block_hashes'] - offset
- d = self._read(offset, size)
- d.addCallback(self._str2l)
- return d
-
- def get_block_hashes(self):
- offset = self._offsets['block_hashes']
- size = self._offsets['share_hashes'] - offset
- d = self._read(offset, size)
- d.addCallback(self._str2l)
- return d
-
- def get_share_hashes(self):
- offset = self._offsets['share_hashes']
- size = self._offsets['uri_extension'] - offset
- assert size % (2+HASH_SIZE) == 0
- d = self._read(offset, size)
- def _unpack_share_hashes(data):
- assert len(data) == size
- hashes = []
- for i in range(0, size, 2+HASH_SIZE):
- hashnum = struct.unpack(">H", data[i:i+2])[0]
- hashvalue = data[i+2:i+2+HASH_SIZE]
- hashes.append( (hashnum, hashvalue) )
- return hashes
- d.addCallback(_unpack_share_hashes)
- return d
-
- def get_uri_extension(self):
- offset = self._offsets['uri_extension']
- d = self._read(offset, 4)
- def _got_length(data):
- length = struct.unpack(">L", data)[0]
- return self._read(offset+4, length)
- d.addCallback(_got_length)
- return d
-
- def _read(self, offset, length):
- return self._rref.callRemote("read", offset, length)
from allmydata import interfaces
from allmydata.util import fileutil, hashutil
from allmydata.storage import BucketWriter, BucketReader, \
- WriteBucketProxy, ReadBucketProxy, StorageServer, MutableShareFile, \
+ StorageServer, MutableShareFile, \
storage_index_to_dir, DataTooLargeError, LeaseInfo
+from allmydata.immutable.layout import WriteBucketProxy, ReadBucketProxy
from allmydata.interfaces import BadWriteEnablerError
from allmydata.test.common import LoggingServiceParent
projects / tahoe-lafs / tahoe-lafs.git / commitdiff