hardcoresushi/libgocryptfs
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26 Commits

Author SHA1 Message Date
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