1caa925868
Increase GCM IV size from 96 to 128 bits
...
This pushes back the birthday bound for collisions to make it virtually
irrelevant.
2015-12-19 15:02:29 +01:00
88826dc51d
diriv: handle directory rename over directory
...
If an empty directory is overwritten we will always get
ENOTEMPTY as the "empty" directory will still contain gocryptfs.diriv.
Handle that case by removing the target directory and trying again.
Fixes issue #10
2015-12-19 13:21:15 +01:00
00a712b4d1
go fmt
...
...and minimal comment changes.
2015-12-13 20:24:13 +01:00
8518d6d7bd
Handle EINTR returned by Fallocate
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Fallocate can return EINTR (interrupted system call) and does so
quite often when cpu profiling is enabled.
2015-12-13 17:17:01 +01:00
e99e841713
Rmdir: handle creating and removing unreadable directories
...
This patch also splits off Mkdir and Rmdir into its own file.
Fixes issue #8 , thanks to @diseq for the bug report.
2015-12-11 20:02:12 +01:00
ccf6d00728
Add missing PlaintextNames checks in OpenDir, Mkdir, Rmdir, initDir
...
Plaintextnames support has bitrotted during the DirIV additions,
this needs test cases. Will be added in a future patch.
Fixes issue #9 .
2015-12-10 01:12:05 +01:00
c6dacd6f91
Add EME filename encryption & enable it by default
2015-12-08 16:17:04 +01:00
ff8c81f95b
go fmt
2015-12-08 13:51:06 +01:00
56888d83dd
fallocate the space needed for the file header beforehand
...
This makes sure writing to a file fails early if the underlying
filesystem does not support fallocate. It also prevents partial header
write due to ENOSPC.
2015-12-06 15:05:52 +01:00
edc289fb75
Fix rename, was broken broken by DirIV introduction
...
As it was, CIPHERDIR was prepended twice, causing every rename
to fail with ENOENT.
2015-12-06 15:00:54 +01:00
ce42a6f23d
Run go fmt
2015-11-29 21:55:20 +01:00
20b058a333
Add single-element cache for DirIV lookup
...
Another 3x performance boost for applications that walk the
directory tree.
Excerpt from performance.txt:
VERSION UNTAR LS RM
v0.4 48 1.5 5
v0.5-rc1 56 7 19
v0.5-rc1-1 54 4.1 9
v0.5-rc1-2 45 1.7 3.4 <---- THIS VERSION
2015-11-29 21:41:38 +01:00
1d0a442405
OpenDir performance: Read DirIV once and reuse it for all names
...
Formerly, we called decryptPath for every name.
That resulted in a directory walk that reads in all diriv files
on the way.
Massive improvement for RM and LS (check performance.txt for details)
VERSION UNTAR RM LS
v0.4 48 5 1.5
v0.5-rc1 56 19 7
v0.5-rc1-1 54 9 4.1 <---- THIS VERSION
2015-11-29 20:03:37 +01:00
1fb349e97b
diriv: also support old CBC symlink
2015-11-28 18:39:45 +01:00
01141f8b5e
diriv: fix Symlink() and Readlink()
...
Both were missing adaptions for diriv usage resulting in broken
functionality
2015-11-28 18:39:45 +01:00
3b2143bafc
diriv: fix readdir
...
It decrypted all file names using the root directory iv
2015-11-28 18:39:45 +01:00
fe7355f9ee
diriv: use "DirIV" flag to discern and support mounting old filesystems
2015-11-28 18:38:06 +01:00
a04a92cdab
Run go fmt
2015-11-27 22:20:01 +01:00
bdd9249a52
diriv: Move WriteDirIV() to cryptfs; add locking to Mkdir, Rmdir
2015-11-27 21:48:58 +01:00
decfc1ab79
diriv: Convert filename encryption users to diriv
2015-11-27 00:03:10 +01:00
fe2fcf6c16
diriv: Transactionally delete gocryptfs.diriv in Rmdir
2015-11-25 22:17:42 +01:00
4d466c3412
diriv: Create gocryptfs.diriv in every directory
2015-11-25 20:57:16 +01:00
61aacb5c1b
Run go fmt and go vet
2015-11-14 17:16:17 +01:00
99dfc84992
Add "-q" (quiet) flag
2015-11-09 22:33:42 +01:00
fa3a382aa4
Handle ENOSPC errors better by preallocating the space before writing
...
Prevent the case that we run out of space in the middle of
writing a block - that would leave a corrupt block behind.
2015-11-08 22:36:29 +01:00
050005fd7b
Centralize path filter decision in CryptFS.IsFiltered()
2015-11-03 22:25:29 +01:00
de56fe9e35
Implement PlainTextNames mode
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Also, forbid access to "gocryptfs.conf" in the root dir.
2015-11-03 00:00:13 +01:00
e31d319c39
Remove code detected by "deadcode"
...
go get github.com/remyoudompheng/go-misc/deadcode
2015-11-01 12:32:10 +01:00
902babdf22
Refactor ciphertext <-> plaintext offset translation functions
...
Move all the intelligence into the new file address_translation.go.
That the calculations were spread out too much became apparent when adding
the file header. This should make the code much easier to modify in the
future.
2015-11-01 12:11:36 +01:00
76311b60f2
Add file header (on-disk-format change)
...
Format: [ "Version" uint16 big endian ] [ "Id" 16 random bytes ]
Quoting SECURITY.md:
* Every file has a header that contains a 16-byte random *file id*
* Each block uses the file id and its block number as GCM *authentication data*
* This means the position of the blocks is protected as well. The blocks
can not be reordered or copied between different files without
causing an decryption error.
2015-11-01 01:38:27 +01:00
a3d286069f
Use block number as authentication data
2015-10-06 22:27:37 +02:00
aa082c235a
Utimens: Use UtimesNano instead of Futimes
...
Futimes() only takes microsecond resolution while the FUSE call
Utimens() wants nanosecond precision.
This is why UTIME_OMIT did not work - this change fixes the
xfstests generic/258 test failure.
The go library does not provide a FutimesNano() function which is
why I use UtimesNano() on /proc/self/fd/n.
This is what the Go library does in Futimes().
2015-10-04 20:32:15 +02:00
c7313f36de
fallocate: return ENOSYS
...
The implementation was incomplete, disable fallocate completely for now.
See https://github.com/rfjakob/gocryptfs/issues/1
Fixes xfstests generic/075
2015-10-04 17:14:40 +02:00
90bd978283
truncate: Fix bug that caused xfstests generic/030 to fail
...
The bug was caused by using cipherOff where plainOff should
have been used.
Renamed the symbols for less confusion.
2015-10-04 16:04:25 +02:00
aa6fa7f3cf
Truncate: Logging improvements, show number of blocks as float
2015-10-04 15:45:46 +02:00
b27edba2bb
Fix Trucate() bug causing files to be too small
...
Uncovered by running xfstests generic/014 several times
2015-10-04 15:40:59 +02:00
89fef80d32
Run go fmt
2015-10-04 14:49:47 +02:00
c859f0b2dc
intraBlock: Rename Offset to Skip
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"Offset" is unclear whether it is an offset from the start of file
or start of block. "Skip" seems much better.
2015-10-04 14:24:43 +02:00
775676ecb8
Utilize file hole passtrough capability in Truncate()
...
Cuts down the runtime of xfstests generic/014
from 1822 seconds to 36 seconds
2015-10-04 14:21:07 +02:00
2003ca965d
Zero-pad last block if a file hole is created on Write()
...
Fixes TestFileHoles test
2015-10-04 11:39:35 +02:00
40448db909
Fix xfstests generic/030 failure
...
The actual fix is
oldSize := f.cfs.PlainSize(uint64(fi.Size()))
the rest is logging improvements
2015-10-04 00:26:20 +02:00
79870ab096
debug: log inode number instead of encrypted filename
...
Makes the log output smaller and more readable.
2015-10-03 19:16:34 +02:00
3fef613591
tests: Add append test
2015-09-30 23:42:18 +02:00
b835f83fd5
Implement Truncate() + Test
2015-09-30 22:36:53 +02:00
aea8d8d6e7
debug: Log encrypted filename
2015-09-30 20:32:24 +02:00
c4ec7a4295
Fix Chown parameter order
2015-09-19 10:46:39 +02:00
67fe4557e5
Fix read benchmark
2015-09-17 22:08:49 +02:00
0af3cfcac0
Fix symlink size reporting
2015-09-16 19:32:37 +02:00
71789ae14f
Don't warn about "gocryptfs.conf" in the ciphertext root dir
2015-09-13 22:09:48 +02:00
6f9e90c414
Encrypt key with scrypt-hashed password
2015-09-13 22:09:38 +02:00
Jakob Unterwurzacher