-
import os, re, base64
from cStringIO import StringIO
from twisted.trial import unittest
reader = MDMFSlotReadProxy(None, None, shnum, data)
# We need to get the offsets for the next part.
d = reader.get_verinfo()
- def _do_corruption(verinfo, data, shnum):
+ def _do_corruption(verinfo, data, shnum, shares):
(seqnum,
root_hash,
IV,
else:
f = flip_bit
shares[shnum] = f(data, real_offset)
- d.addCallback(_do_corruption, data, shnum)
+ d.addCallback(_do_corruption, data, shnum, shares)
ds.append(d)
dl = defer.DeferredList(ds)
dl.addCallback(lambda ignored: res)
self.nodemaker.default_encoding_parameters['n'] = 1
d = defer.succeed(None)
for v in (SDMF_VERSION, MDMF_VERSION):
- d.addCallback(lambda ignored:
+ d.addCallback(lambda ignored, v=v:
self.nodemaker.create_mutable_file(version=v))
def _created(n):
self.failUnless(isinstance(n, MutableFileNode))
self.failUnlessEqual(data, CONTENTS))
return d
+ def test_1654(self):
+ # test that the Retrieve object unconditionally verifies the block
+ # hash tree root for mutable shares. The failure mode is that
+ # carefully crafted shares can cause undetected corruption (the
+ # retrieve appears to finish successfully, but the result is
+ # corrupted). When fixed, these shares always cause a
+ # CorruptShareError, which results in NotEnoughSharesError in this
+ # 2-of-2 file.
+ self.basedir = "mutable/Problems/test_1654"
+ self.set_up_grid(num_servers=2)
+ cap = uri.from_string(TEST_1654_CAP)
+ si = cap.get_storage_index()
+
+ for share, shnum in [(TEST_1654_SH0, 0), (TEST_1654_SH1, 1)]:
+ sharedata = base64.b64decode(share)
+ storedir = self.get_serverdir(shnum)
+ storage_path = os.path.join(storedir, "shares",
+ storage_index_to_dir(si))
+ fileutil.make_dirs(storage_path)
+ fileutil.write(os.path.join(storage_path, "%d" % shnum),
+ sharedata)
+
+ nm = self.g.clients[0].nodemaker
+ n = nm.create_from_cap(TEST_1654_CAP)
+ # to exercise the problem correctly, we must ensure that sh0 is
+ # processed first, and sh1 second. NoNetworkGrid has facilities to
+ # stall the first request from a single server, but it's not
+ # currently easy to extend that to stall the second request (mutable
+ # retrievals will see two: first the mapupdate, then the fetch).
+ # However, repeated executions of this run without the #1654 fix
+ # suggests that we're failing reliably even without explicit stalls,
+ # probably because the servers are queried in a fixed order. So I'm
+ # ok with relying upon that.
+ d = self.shouldFail(NotEnoughSharesError, "test #1654 share corruption",
+ "ran out of peers",
+ n.download_best_version)
+ return d
+
+
+TEST_1654_CAP = "URI:SSK:6jthysgozssjnagqlcxjq7recm:yxawei54fmf2ijkrvs2shs6iey4kpdp6joi7brj2vrva6sp5nf3a"
+
+TEST_1654_SH0 = """\
+VGFob2UgbXV0YWJsZSBjb250YWluZXIgdjEKdQlEA46m9s5j6lnzsOHytBTs2JOo
+AkWe8058hyrDa8igfBSqZMKO3aDOrFuRVt0ySYZ6oihFqPJRAAAAAAAAB8YAAAAA
+AAAJmgAAAAFPNgDkK8brSCzKz6n8HFqzbnAlALvnaB0Qpa1Bjo9jiZdmeMyneHR+
+UoJcDb1Ls+lVLeUqP2JitBEXdCzcF/X2YMDlmKb2zmPqWfOw4fK0FOzYk6gCRZ7z
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABCDwr
+uIlhFlv21pDqyMeA9X1wHp98a1CKY4qfC7gn5exyODAcnhZKHCV18XBerbZLAgIA
+AAAAAAAAJgAAAAAAAAAmAAABjwAAAo8AAALTAAAC8wAAAAAAAAMGAAAAAAAAB8Yw
+ggEgMA0GCSqGSIb3DQEBAQUAA4IBDQAwggEIAoIBAQCXKMor062nfxHVutMbqNcj
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++QdxfcwAAm5iDnzPtsVdcbuNkKprfI8N4n+QmUOSMbAJ7M8r1cp4z9+5yd/pjkVy
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+jaiGCR8/UXHFBGZhCgLB2S+BNXKynIeP+POGQtMIIERUtwOIKt1KfZ9jZwf/ulJK
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+DFobNPiNWbc+4H+3wg1R0oK/uTQb8u1S7uWIGVmi5fJ4rVVZ/VKKtHGVwm/8OGKF
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+bQHi/oRGA1aHSn84SIt+HpAfRoVdr4N90bYWmYQNqfKoyWCbEr+dge/GSD1nddAJ
+72mXGlqyLyWYuAAAAAA="""
+
+TEST_1654_SH1 = """\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+72mXGlqyLyWYuAAAAAA="""
+
class FileHandle(unittest.TestCase):
def setUp(self):
projects / tahoe-lafs / tahoe-lafs.git / blobdiff