hardcoresushi/libgocryptfs
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27 Commits

Author SHA1 Message Date
Jakob Unterwurzacher
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
Jakob Unterwurzacher
e31d319c39 Remove code detected by "deadcode" 
go get github.com/remyoudompheng/go-misc/deadcode
 2015-11-01 12:32:10 +01:00
Jakob Unterwurzacher
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
Jakob Unterwurzacher
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
Jakob Unterwurzacher
a3d286069f Use block number as authentication data 2015-10-06 22:27:37 +02:00
Jakob Unterwurzacher
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
Jakob Unterwurzacher
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
Jakob Unterwurzacher
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
Jakob Unterwurzacher
aa6fa7f3cf Truncate: Logging improvements, show number of blocks as float 2015-10-04 15:45:46 +02:00
Jakob Unterwurzacher
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
Jakob Unterwurzacher
89fef80d32 Run go fmt 2015-10-04 14:49:47 +02:00
Jakob Unterwurzacher
c859f0b2dc intraBlock: Rename Offset to Skip 
"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
Jakob Unterwurzacher
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
Jakob Unterwurzacher
2003ca965d Zero-pad last block if a file hole is created on Write() 
Fixes TestFileHoles test
 2015-10-04 11:39:35 +02:00
Jakob Unterwurzacher
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
Jakob Unterwurzacher
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
Jakob Unterwurzacher
3fef613591 tests: Add append test 2015-09-30 23:42:18 +02:00
Jakob Unterwurzacher
b835f83fd5 Implement Truncate() + Test 2015-09-30 22:36:53 +02:00
Jakob Unterwurzacher
aea8d8d6e7 debug: Log encrypted filename 2015-09-30 20:32:24 +02:00
Jakob Unterwurzacher
0af3cfcac0 Fix symlink size reporting 2015-09-16 19:32:37 +02:00
Jakob Unterwurzacher
e7ba3c61f1 Fix File.GettAttr() size reporting 
The too-large reported value broke mmap
(applications saw appended zero bytes)

Also
* Add locking for all fd operations
* Add "--debug" command line switch
 2015-09-09 19:32:59 +02:00
Jakob Unterwurzacher
80935a0e1b Explain both frontends in readme 
Also, re-enable openssl and disable debug messages so testing
gocryptfs is less painful
 2015-09-08 23:09:28 +02:00
Jakob Unterwurzacher
28cdff5889 tests: add TestCiphertextRange 2015-09-08 22:36:38 +02:00
Jakob Unterwurzacher
b13cc9686c Fix append issue 2015-09-08 22:34:23 +02:00
Jakob Unterwurzacher
1ca4fc89aa More debug logging, improve main_test.go (do not use all-zero content) 2015-09-08 22:03:27 +02:00
Jakob Unterwurzacher
caaad7c8d7 Add pathfs frontend, part II 
Fix issues in read and write paths.
Now passes selftest.
 2015-09-08 21:35:06 +02:00
Jakob Unterwurzacher
889ae90081 Add pathfs frontend (uses go-fuse instead of bazil-fuse), part I 
Currently fails main_test.go, will be fixed in part II
 2015-09-08 00:55:03 +02:00