hardcoresushi/libgocryptfs
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Author SHA1 Message Date
Jakob Unterwurzacher
bd78b44389 cryptocore, main: add two comments 
While reading the code, I had to think about what it
does, so add a comment that explains it.
 2018-02-18 12:41:11 +01:00
Jakob Unterwurzacher
0efd220d1e configfile: overwrite and let keys run out of scope 
As soon as we don't need them anymore, overwrite
keys with zeros and make sure they run out of scope
so we don't create a risk of inadvertedly using all-zero
keys for encryption.

https://github.com/rfjakob/gocryptfs/issues/211
 2018-02-18 12:39:44 +01:00
Jakob Unterwurzacher
72ddbae1e6 stupidgcm: create private copy of the key 
Relieves the caller from worrying about whether they
can overwrite the key.
 2018-02-18 12:35:51 +01:00
Jakob Unterwurzacher
18f6c6106c main: try to wipe cryptocore's secret keys on unmount 
Raise the bar for recovering keys from memory.

https://github.com/rfjakob/gocryptfs/issues/211
 2018-02-18 11:39:10 +01:00
Jakob Unterwurzacher
719693ec5d fusefrontend[_reverse]: move crypto init up to caller 
Both fusefrontend and fusefrontend_reverse were doing
essentially the same thing, move it into main's
initFuseFrontend.

A side-effect is that we have a reference to cryptocore
in main, which will help with wiping the keys on exit
(https://github.com/rfjakob/gocryptfs/issues/211).
 2018-02-18 11:21:58 +01:00
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