From: Brian Warner Date: Sat, 7 Feb 2009 20:38:17 +0000 (-0700) Subject: test/common.py: in share-layout-reading code, use '>L' consistently, since '>l' doesn... X-Git-Tag: allmydata-tahoe-1.3.0~68 X-Git-Url: https://git.rkrishnan.org/%5B/%5D%20/uri/%22doc.html/quickstart.html?a=commitdiff_plain;h=50886ea494cc3b79c3dd9091fdfa11677796d1a7;p=tahoe-lafs%2Ftahoe-lafs.git test/common.py: in share-layout-reading code, use '>L' consistently, since '>l' doesn't specify the signedness and the windows tests appear to be failing with an endianness-like problem (version==0x01000000). Also use binary mode when editing sharefiles --- diff --git a/src/allmydata/test/common.py b/src/allmydata/test/common.py index 50ca7a82..9b4048d2 100644 --- a/src/allmydata/test/common.py +++ b/src/allmydata/test/common.py @@ -919,7 +919,7 @@ class ShareManglingMixin(SystemTestMixin): # Whoops, I guess that's not a share file then. pass else: - data = open(os.path.join(sharedir, dirp, fn), "r").read() + data = open(os.path.join(sharedir, dirp, fn), "rb").read() shares[(i, sharenum)] = data return shares @@ -944,8 +944,9 @@ class ShareManglingMixin(SystemTestMixin): if clientnum == i: fullsharedirp=os.path.join(sharedir, storage_index_to_dir(storage_index)) fileutil.make_dirs(fullsharedirp) - wf = open(os.path.join(fullsharedirp, str(sharenum)), "w") + wf = open(os.path.join(fullsharedirp, str(sharenum)), "wb") wf.write(newdata) + wf.close() def _delete_a_share(self, unused=None, sharenum=None): """ Delete one share. """ @@ -1123,30 +1124,30 @@ def _corrupt_sharedata_version_number(data): """ Scramble the file data -- the share data version number will have one bit flipped or else will be changed to a random value, but not 1 or 2.""" return corrupt_field(data, 0x0c, 4) - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." newsharevernum = sharevernum while newsharevernum in (1, 2): newsharevernum = random.randrange(0, 2**32) - newsharevernumbytes = struct.pack(">l", newsharevernum) + newsharevernumbytes = struct.pack(">L", newsharevernum) return data[:0x0c] + newsharevernumbytes + data[0x0c+4:] def _corrupt_sharedata_version_number_to_plausible_version(data): """ Scramble the file data -- the share data version number will be changed to 2 if it is 1 or else to 1 if it is 2.""" - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: newsharevernum = 2 else: newsharevernum = 1 - newsharevernumbytes = struct.pack(">l", newsharevernum) + newsharevernumbytes = struct.pack(">L", newsharevernum) return data[:0x0c] + newsharevernumbytes + data[0x0c+4:] def _corrupt_segment_size(data): """ Scramble the file data -- the field showing the size of the segment will have one bit flipped or else be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: return corrupt_field(data, 0x0c+0x04, 4, debug=False) @@ -1156,7 +1157,7 @@ def _corrupt_segment_size(data): def _corrupt_size_of_sharedata(data): """ Scramble the file data -- the field showing the size of the data within the share data will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: return corrupt_field(data, 0x0c+0x08, 4) @@ -1166,7 +1167,7 @@ def _corrupt_size_of_sharedata(data): def _corrupt_offset_of_sharedata(data): """ Scramble the file data -- the field showing the offset of the data within the share data will have one bit flipped or else be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: return corrupt_field(data, 0x0c+0x0c, 4) @@ -1177,7 +1178,7 @@ def _corrupt_offset_of_ciphertext_hash_tree(data): """ Scramble the file data -- the field showing the offset of the ciphertext hash tree within the share data will have one bit flipped or else be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: return corrupt_field(data, 0x0c+0x14, 4, debug=False) @@ -1187,7 +1188,7 @@ def _corrupt_offset_of_ciphertext_hash_tree(data): def _corrupt_offset_of_block_hashes(data): """ Scramble the file data -- the field showing the offset of the block hash tree within the share data will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: return corrupt_field(data, 0x0c+0x18, 4) @@ -1198,7 +1199,7 @@ def _corrupt_offset_of_block_hashes_to_truncate_crypttext_hashes(data): """ Scramble the file data -- the field showing the offset of the block hash tree within the share data will have a multiple of hash size subtracted from it, thus causing the downloader to download an incomplete crypttext hash tree.""" - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: curval = struct.unpack(">L", data[0x0c+0x18:0x0c+0x18+4])[0] @@ -1214,7 +1215,7 @@ def _corrupt_offset_of_block_hashes_to_truncate_crypttext_hashes(data): def _corrupt_offset_of_share_hashes(data): """ Scramble the file data -- the field showing the offset of the share hash tree within the share data will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: return corrupt_field(data, 0x0c+0x1c, 4) @@ -1224,7 +1225,7 @@ def _corrupt_offset_of_share_hashes(data): def _corrupt_offset_of_uri_extension(data): """ Scramble the file data -- the field showing the offset of the uri extension will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: return corrupt_field(data, 0x0c+0x20, 4) @@ -1236,7 +1237,7 @@ def _corrupt_offset_of_uri_extension_to_force_short_read(data, debug=False): to the size of the file minus 3. This means when the client tries to read the length field from that location it will get a short read -- the result string will be only 3 bytes long, not the 4 or 8 bytes necessary to do a successful struct.unpack.""" - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." # The "-0x0c" in here is to skip the server-side header in the share file, which the client doesn't see when seeking and reading. if sharevernum == 1: @@ -1251,7 +1252,7 @@ def _corrupt_offset_of_uri_extension_to_force_short_read(data, debug=False): def _corrupt_share_data(data): """ Scramble the file data -- the field containing the share data itself will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: sharedatasize = struct.unpack(">L", data[0x0c+0x08:0x0c+0x08+4])[0] @@ -1266,7 +1267,7 @@ def _corrupt_crypttext_hash_tree(data): """ Scramble the file data -- the field containing the crypttext hash tree will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: crypttexthashtreeoffset = struct.unpack(">L", data[0x0c+0x14:0x0c+0x14+4])[0] @@ -1281,7 +1282,7 @@ def _corrupt_block_hashes(data): """ Scramble the file data -- the field containing the block hash tree will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: blockhashesoffset = struct.unpack(">L", data[0x0c+0x18:0x0c+0x18+4])[0] @@ -1296,7 +1297,7 @@ def _corrupt_share_hashes(data): """ Scramble the file data -- the field containing the share hash chain will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: sharehashesoffset = struct.unpack(">L", data[0x0c+0x1c:0x0c+0x1c+4])[0] @@ -1310,7 +1311,7 @@ def _corrupt_share_hashes(data): def _corrupt_length_of_uri_extension(data): """ Scramble the file data -- the field showing the length of the uri extension will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: uriextoffset = struct.unpack(">L", data[0x0c+0x20:0x0c+0x20+4])[0] @@ -1322,7 +1323,7 @@ def _corrupt_length_of_uri_extension(data): def _corrupt_uri_extension(data): """ Scramble the file data -- the field containing the uri extension will have one bit flipped or else will be changed to a random value. """ - sharevernum = struct.unpack(">l", data[0x0c:0x0c+4])[0] + sharevernum = struct.unpack(">L", data[0x0c:0x0c+4])[0] assert sharevernum in (1, 2), "This test is designed to corrupt immutable shares of v1 or v2 in specific ways." if sharevernum == 1: uriextoffset = struct.unpack(">L", data[0x0c+0x20:0x0c+0x20+4])[0]