hardcoresushi/libgocryptfs
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Author SHA1 Message Date
Jakob Unterwurzacher
eeed4b4bef stupidgcm: implement key wipe 
Not bulletproof due to possible GC copies, but
still raises to bar for extracting the key.

https://github.com/rfjakob/gocryptfs/issues/211
 2018-02-17 15:14:55 +01:00
Jakob Unterwurzacher
7e0fefe970 stupidgcm: switch to pointer receivers 
What the key slice does not get copied around
will make it possible to check if the key has been wiped.
 2018-02-17 15:02:01 +01:00
Jakob Unterwurzacher
a3694e0c07 benchmark.bash: print tested version 2018-02-06 23:03:07 +01:00
Jakob Unterwurzacher
a624aab8a1 README: Mention min required Go version 2018-02-05 22:24:51 +01:00
Jakob Unterwurzacher
8151222ada gccgo: skip emulateGetdents on linux 
The test is known to fail on gccgo
(https://github.com/rfjakob/gocryptfs/issues/201), but
getdents emulation is not used on linux, so let's skip
the test and ignore the failure.
 2018-02-04 21:14:12 +01:00
Felix Lechner
bf2f9640c4 Fix spelling (#205) 2018-02-04 20:38:22 +01:00
Felix Lechner
5b986288cf Fix assignment error in Unix2syscall by converting Timespec into Nsec (#203) 
$ go.gcc build
# github.com/rfjakob/gocryptfs/internal/syscallcompat
internal/syscallcompat/unix2syscall_linux.go:32:13: error: incompatible types in assignment (cannot use type int64 as type syscall.Timespec_sec_t)
  s.Atim.Sec = u.Atim.Sec
             ^
 2018-02-03 13:42:49 +01:00
Jakob Unterwurzacher
866e850842 MANPAGE: improve markdown rendering 
The man page is rendered on github at
https://github.com/rfjakob/gocryptfs/blob/master/Documentation/MANPAGE.md .
Improve formatting a little.
 2018-02-03 13:39:07 +01:00
Jakob Unterwurzacher
9f8d0d8e57 gccgo: replace syscall.NAME_MAX with unix.NAME_MAX 
For some reason the syscall.NAME_MAX constant does not exist
on gccgo, and it does not hurt us to use unix.NAME_MAX instead.

https://github.com/rfjakob/gocryptfs/issues/201
 2018-02-01 23:50:11 +01:00
Jakob Unterwurzacher
26ba8103bf syscallcompat: switch from syscall.Getdents to unix.Getdents 
On mips64le, syscall.Getdents() and struct syscall.Dirent do
not fit together, causing our Getdents implementation to
return garbage ( https://github.com/rfjakob/gocryptfs/issues/200
and https://github.com/golang/go/issues/23624 ).

Switch to unix.Getdents which does not have this problem -
the next Go release with the syscall package fixes is too
far away, and will take time to trickle into distros.
 2018-01-31 18:59:10 +01:00
Jakob Unterwurzacher
b611e01035 Update deps 2018-01-31 18:57:41 +01:00
Kenneth Newwood
8afcb43b83 added usage of reverse mode to README 2018-01-28 15:40:20 +01:00
Jakob Unterwurzacher
f3838c09d8 syscallcompat: hardcode maxReclen = 280 for all architectures 
Due to padding between entries, it is 280 even on 32-bit architectures.
See https://github.com/rfjakob/gocryptfs/issues/197 for details.
 2018-01-25 22:22:13 +01:00
Jakob Unterwurzacher
b318572312 syscallcompat: fix reversed warning output 
We used to print somewhat strange messages:

	Getdents: corrupt entry #1: Reclen=276 > 280. Returning EBADR

Reported at https://github.com/rfjakob/gocryptfs/issues/197
 2018-01-25 21:42:15 +01:00
rfjakob
163964b090
Update README.md 
README: add missing word
 2018-01-25 21:35:57 +01:00
Jakob Unterwurzacher
ea51837361 fusefrontend: drop unused haveGetdents warning 
We don't actually print that warning anymore.
 2018-01-25 09:06:06 +01:00
Jakob Unterwurzacher
de878a3346 syscallcompat: explain why we don't use syscall.ParseDirent() 
syscall.ParseDirent only returns the NAMES, we want
everything.
 2018-01-25 08:43:30 +01:00
Jakob Unterwurzacher
7015a6ebfb Documentation: update xfstests output 
Also update the v1.4.3 release date to today.
The release was delayed one day.
 2018-01-21 20:49:17 +01:00
Jakob Unterwurzacher
991708af01 Documentation: add extractloop example output 2018-01-21 20:04:37 +01:00
Jakob Unterwurzacher
f63ce35b3d Update changelog for 1.4.3 2018-01-20 14:27:03 +01:00
Jakob Unterwurzacher
735b92c48b Travis CI: also build with vendored dependencies 2018-01-20 13:49:20 +01:00
Jakob Unterwurzacher
6d46c4f31c dep: update dependencies 
We needed a newer version of x/sys/unix to compile,
and we want the fixes in go-fuse.
 2018-01-20 13:49:20 +01:00
Jakob Unterwurzacher
bac7ef4834 MacOS: rely on OSXFuse to create the mountpoint 
As reported in https://github.com/rfjakob/gocryptfs/issues/194 ,
OSXFuse creates the mountpoint if it does not exist.
 2018-01-20 13:42:29 +01:00
Jakob Unterwurzacher
277ad087ff MANPAGE: improve description of -o and -ko 
Was unclear for new users - see https://github.com/rfjakob/gocryptfs/issues/194
 2018-01-20 13:35:26 +01:00
Jakob Unterwurzacher
a2677bce2a fusefrontend_reverse: use OpenNofollow in virtualFile.GetAttr 
Makes it robust against symlink races.

Final piece, closes https://github.com/rfjakob/gocryptfs/issues/165
 2018-01-17 21:36:38 +01:00
Jakob Unterwurzacher
959e1fc1e2 fusefrontend_reverse: use OpenNofollow in findLongnameParent 
Protects findLongnameParent against symlink races.

Also add comments to several functions along the way.

Reported at https://github.com/rfjakob/gocryptfs/issues/165
 2018-01-17 20:54:05 +01:00
Jakob Unterwurzacher
8951eb2472 fusefronted: add PlaintextNames special-cases for Create & Rename 
gocryptfs.longname.XXX files were considered magic in PlaintextNames
mode, which was wrong.

Fix that and add tests.

Fixes https://github.com/rfjakob/gocryptfs/issues/174
 2018-01-17 00:25:36 +01:00
Jakob Unterwurzacher
36ffd813cd Run go fmt 2018-01-16 23:18:53 +01:00
Jakob Unterwurzacher
7d477d692b MacOS: rely on OSXFuse to create mountpoint below /Volumes 
OSXFuse automatically creates the mountpoint if it is
below /Volumes because this would require root permissions
which the user might not have.

Reported at https://github.com/rfjakob/gocryptfs/issues/194
 2018-01-16 23:18:53 +01:00
Felix Lechner
a4dff6aea0 Provide basic man page for xray tool (#193) 
Provide basic man page for xray tool
 2018-01-10 20:27:03 +01:00
Felix Lechner
63c3878b7c Fix spelling 2018-01-10 09:26:48 +01:00
Jakob Unterwurzacher
025f33e366 package-source.bash: archive HEAD instead of master 
To be able to check out an older version and create
a tarball from it, let `git archive` operate on HEAD.

This used to be broken in a bad way: we use `git describe`
which operates on HEAD to name the tarball, but always archived
HEAD.
 2018-01-07 22:29:02 +01:00
Jakob Unterwurzacher
1ae218b417 package-source.bash: also create source-only tarball 
We used to only create a source + dependecies tarball,
but having a source-only tarball makes packaging deb/rpm
easier.
 2018-01-07 19:01:59 +01:00
Sebastian Lackner
a85dbcab38 fusefrontend: Use Linkat syscall to implement Link 2017-12-25 15:07:37 +01:00
Sebastian Lackner
a24342f656 fusefrontend: Handle PlaintextNames mode in Link 
In PlaintextNames mode the "gocryptfs.longname." prefix does not have any
special meaning.

https://github.com/rfjakob/gocryptfs/issues/174
 2017-12-25 15:07:37 +01:00
Rohan Talip
ca594b2349 Pinned the link to line 38 of performance.txt to version 1.4.1 since f0e29d9b90 (diff-86b7f3262ae352959ee0e04cccaac1b0) added an extra line. 2017-12-25 15:06:19 +01:00
Sebastian Lackner
631974f9e0 fusefrontend_reverse: Use O_DIRECTORY in OpenDir implementation 
Also get rid of the defer - it is not really necessary here.
 2017-12-11 21:18:20 +01:00
Sebastian Lackner
96dc2ca709 fusefrontend_reverse: Reject access to device nodes in newFile function 
Steps to reproduce:

* Create a regular reverse mount point
* Create a file "test" in the original directory
* Access the corresponding encrypted directory in the mount point (ls <encrypted dir>)
* Quickly delete the file in the original data - instead create a device node
* Access the file again, it will access the device node and attempt to read from it

Fixes https://github.com/rfjakob/gocryptfs/issues/187
 2017-12-11 09:55:16 +01:00
Sebastian Lackner
3af51736f3 fusefrontend_reverse: Use openBackingDir in GetAttr 
Also fixes 48bd59f388 - the directory FD should
also be closed in case of an error.
 2017-12-07 23:36:11 +01:00
Sebastian Lackner
ad0f110191 fusefrontend_reverse: Use openBackingDir in Readlink 2017-12-07 23:36:11 +01:00
Jakob Unterwurzacher
48bd59f388 fusefrontend_reverse: fix fd leak in GetAttr 
Fixes https://github.com/rfjakob/gocryptfs/issues/184
 2017-12-07 09:01:12 +01:00
Jakob Unterwurzacher
87736eb833 fusefrontend_reverse: secure Access against symlink races (somewhat) 
Unfortunately, faccessat in Linux ignores AT_SYMLINK_NOFOLLOW,
so this is not completely atomic.

Given that the information you get from access is not very
interesting, it seems good enough.

https://github.com/rfjakob/gocryptfs/issues/165
 2017-12-07 00:11:35 +01:00
Jakob Unterwurzacher
2ceef01afe syscallcompat: add Faccessat 
Add faccessat(2) with a hack for symlink, because the
kernel does not actually looks at the passed flags.

From man 2 faccessat:

   C library/kernel differences
       The  raw faccessat() system call takes only the first three argu‐
       ments.  The AT_EACCESS and AT_SYMLINK_NOFOLLOW flags are actually
       implemented  within  the  glibc wrapper function for faccessat().
 2017-12-07 00:05:28 +01:00
Jakob Unterwurzacher
6bd2da89d3 tets_helpers: handle t=nil in InitFS 
The reverse tests call InitFS with t=nil. By
calling panic we get a better error message instead
of a generic nil pointer dereference.
 2017-12-06 23:03:37 +01:00
Jakob Unterwurzacher
e042eb38fa fusefrontend_reverse: secure Readlink against symlink races 
...by using Readlinkat.

Tracking ticket: https://github.com/rfjakob/gocryptfs/issues/165
 2017-12-06 21:13:08 +01:00
Jakob Unterwurzacher
f97494e89b syscallcompat: add Readlinkat 
We need readlinkat to implement Readlink
symlink-race-free.
 2017-12-06 21:07:24 +01:00
Jakob Unterwurzacher
6beb45e5b7 syscallcompat: add Darwin version of unix2syscall 
The "Atim" field is called "Atimespec" on Darwin,
same for Mtim and Ctim.
 2017-12-06 00:18:38 +01:00
Jakob Unterwurzacher
a3bdc2bf2b fusefrontend_reverse: secure GetAttr against symlink races 
...by using the OpenNofollow helper & Fstatat.

Also introduce a helper to convert from unix.Stat_t to
syscall.Stat_t.

Tracking ticket: https://github.com/rfjakob/gocryptfs/issues/165
 2017-12-06 00:06:31 +01:00
Jakob Unterwurzacher
03bf604fc0 syscallcompat: OpenNofollow: use O_DIRECTORY flag 
...when opening intermedia directories to give us an
extra layer of safety.

From the FreeBSD man page:

     This flag can be used to prevent applications with elevated
     privileges from opening files which are even unsafe to open with O_RDONLY,
     such as device nodes.
 2017-12-05 23:31:07 +01:00
Jakob Unterwurzacher
926cb93b50 fusefrontend_reverse: secure OpenDir against symlink races 
...by using the new OpenNofollow helper.

The benchmark shows a small but acceptable performance loss:

  $ ./benchmark-reverse.bash
  LS:  2.182
  CAT: 18.221

Tracking ticket: https://github.com/rfjakob/gocryptfs/issues/165
 2017-12-05 23:14:12 +01:00