Commit Graph

156 Commits

Author SHA1 Message Date
Jakob Unterwurzacher
1789a5ea5b tests: matrix_test: skip cases when without_openssl is set
Fixes test-without-openssl.bash.
2018-03-05 23:11:27 +01:00
Jakob Unterwurzacher
35192abb57 test_helpers: add missing newline 2018-03-05 23:06:27 +01:00
Jakob Unterwurzacher
870779ab1d macos: doTestUtimesNano: skip UTIME_OMIT and nanoseconds testcases
Not supported on macos.

Beef up the first test case a little by using different second
values.
2018-03-05 22:52:05 +01:00
Jakob Unterwurzacher
426b9536df tests: TestUtimesNano: replace ugly compareUtimes wrapper 2018-03-05 22:22:35 +01:00
Jakob Unterwurzacher
3064d72b97 tests: fix a few fd leaks
We relied on the finalizer to close a few fds.
For some reason, this did not cause problems on Linux,
but on MacOS, it causes unmount failures:

umount(/private/tmp/gocryptfs-test-parent/194654785/default-plain): Resource busy -- try 'diskutil unmount'
2018-03-05 22:00:59 +01:00
Jakob Unterwurzacher
aa65091bb9 macos: skip TestUtimesNanoSymlink early
Gets rid of the touch error message upon running the tests.
2018-03-05 21:36:16 +01:00
Jakob Unterwurzacher
b820fa691d macos: adjust TestTooLongSymlink length for darwin
Limit is much lower than on linux
2018-03-05 21:23:57 +01:00
Jakob Unterwurzacher
29496baa70 MacOS: skip TestUtimesNanoSymlink and TestUtimesNanoFd
These cannot work on MacOS.
2018-02-28 20:48:33 +01:00
Jakob Unterwurzacher
48d5f10c79 test_helpers: use an intermediate pipe for subprocess stdout
To Go test logic waits for stderr and stdout to close, so
when we share it with a subprocess, it will wait for it to
exit as well.

We don't want the tests to hang when the unmount fails.

Seen on MacOS as reported at
https://github.com/rfjakob/gocryptfs/issues/213
2018-02-28 20:03:54 +01:00
Jakob Unterwurzacher
3b8f5cbb17 readpassword: convert from string to []byte
This will allows us to overwrite the password
with zeros once we are done with it.

https://github.com/rfjakob/gocryptfs/issues/211
2018-02-18 14:26:54 +01:00
Jakob Unterwurzacher
991708af01 Documentation: add extractloop example output 2018-01-21 20:04:37 +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
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
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
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
Sebastian Lackner
614745ee57 fusefrontend: allow_other: close race between mkdir and chown
Fixes the same problem as described in 72b975867a,
except for directories instead of device nodes.
2017-11-29 13:28:04 +01:00
Sebastian Lackner
2591900b69 fusefrontend: Handle PlaintextNames mode in Unlink
In PlaintextNames mode the "gocryptfs.longname." prefix does not have any
special meaning. We should not attempt to delete any .name files.

Partially fixes https://github.com/rfjakob/gocryptfs/issues/174
2017-11-28 09:28:06 +01:00
Sebastian Lackner
3f68b0c09a fusefrontend: Handle PlaintextNames mode in Mknod
In PlaintextNames mode the "gocryptfs.longname." prefix does not have any
special meaning. We should not attempt to read the directory IV or to
create special .name files.

Partially fixes https://github.com/rfjakob/gocryptfs/issues/174
2017-11-28 09:28:06 +01:00
Jakob Unterwurzacher
72b975867a fusefronted: allow_other: close race between mknod and chown
If the user manages to replace the directory with
a symlink at just the right time, we could be tricked
into chown'ing the wrong file.

This change fixes the race by using fchownat, which
unfortunately is not available on darwin, hence a compat
wrapper is added.

Scenario, as described by @slackner at
https://github.com/rfjakob/gocryptfs/issues/177 :

1. Create a forward mount point with `plaintextnames` enabled
2. Mount as root user with `allow_other`
3. For testing purposes create a file `/tmp/file_owned_by_root`
   which is owned by the root user
4. As a regular user run inside of the GoCryptFS mount:

```
mkdir tempdir
mknod tempdir/file_owned_by_root p &
mv tempdir tempdir2
ln -s /tmp tempdir
```

When the steps are done fast enough and in the right order
(run in a loop!), the device file will be created in
`tempdir`, but the `lchown` will be executed by following
the symlink. As a result, the ownership of the file located
at `/tmp/file_owned_by_root` will be changed.
2017-11-27 21:04:45 +01:00
Jakob Unterwurzacher
1bb47b6796 reverse: reject too-long symlink target reads with ENAMETOOLONG
If the symlink target gets too long due to base64 encoding, we should
return ENAMETOOLONG instead of having the kernel reject the data and
returning an I/O error to the user.

Fixes https://github.com/rfjakob/gocryptfs/issues/167
2017-11-26 21:37:12 +01:00
Sebastian Lackner
90687215a4 fusefrontend_reverse: Do not mix up cache information for different directories
Fixes https://github.com/rfjakob/gocryptfs/issues/168

Steps to reproduce the problem:

* Create a regular reverse mount point
* Create files with the same very long name in multiple directories - so far
  everything works as expected, and it will appear with a different name each
  time, for example, gocryptfs.longname.A in directory A and
  gocryptfs.longname.B in directory B
* Try to access a path with A/gocryptfs.longname.B or B/gocryptfs.longname.A -
  this should fail, but it actually works.

The problem is that the longname cache only uses the path as key and not the
dir or divIV. Assume an attacker can directly interact with a reverse mount and
knows the relation longname path -> unencoded path in one directory, it allows
to test if the same unencoded filename appears in any other directory.
2017-11-25 16:20:48 +01:00
Sebastian Lackner
9f56b33e0c fusefrontend: Fix longname handling for renames with existing target
Fixes https://github.com/rfjakob/gocryptfs/issues/170

Steps to reproduce the problem:

* Create a regular forward mount point
* Create a file with a shortname and one with a long filename
* Try to run 'mv <shortname> <longname>'

This should actually work and replace the existing file, but instead it
fails with:

    mv: cannot move '<shortname>' to '<longname>': File exists

The problem is the creation of the .name file. If the target already exists
we can safely ignore the EEXIST error and just keep the existing .name file.
2017-11-25 16:19:09 +01:00
Sebastian Lackner
d257bb34c1 tests: Add test for access to encrypted version of '.' and '..'
To show that https://github.com/rfjakob/gocryptfs/issues/163 has been fixed.
2017-11-23 08:48:00 +01:00
Sebastian Lackner
f3c777d5ea main: Add '-devrandom' commandline option
Allows to use /dev/random for generating the master key instead of the
default Go implementation. When the kernel random generator has been
properly initialized both are considered equally secure, however:

* Versions of Go prior to 1.9 just fall back to /dev/urandom if the
  getrandom() syscall would be blocking (Go Bug #19274)

* Kernel versions prior to 3.17 do not support getrandom(), and there
  is no check if the random generator has been properly initialized
  before reading from /dev/urandom

This is especially useful for embedded hardware with low-entroy. Please
note that generation of the master key might block indefinitely if the
kernel cannot harvest enough entropy.
2017-11-21 23:37:06 +01:00
Jakob Unterwurzacher
64e5906ffa fusefrontend_reverse: workaround ext4 test failure
The extended TestLongnameStat() exposes a pathological case
when run on ext4, as ext4 reuses inode numbers immediately.

This change modifies the test to not delete the files immediately,
so the inode numbers cannot be reused immediately.

Fix for the underlying issue is a TODO.
2017-10-03 21:15:17 +02:00
Jakob Unterwurzacher
4da245c69d fusefrontend_reverse: fix 176-byte names
A file with a name of exactly 176 bytes length caused this error:

  ls: cannot access ./tmp/dsg/sXSGJLTuZuW1FarwIkJs0w/b6mGjdxIRpaeanTo0rbh0A/QjMRrQZC_4WLhmHI1UOBcA/gocryptfs.longname.QV-UipdDXeUVdl05WruoEzBNPrQCfpu6OzJL0_QnDKY: No such file or directory
  ls: cannot access ./tmp/dsg/sXSGJLTuZuW1FarwIkJs0w/b6mGjdxIRpaeanTo0rbh0A/QjMRrQZC_4WLhmHI1UOBcA/gocryptfs.longname.QV-UipdDXeUVdl05WruoEzBNPrQCfpu6OzJL0_QnDKY.name: No such file or directory
  -????????? ? ?     ?             ?            ? gocryptfs.longname.QV-UipdDXeUVdl05WruoEzBNPrQCfpu6OzJL0_QnDKY
  -????????? ? ?     ?             ?            ? gocryptfs.longname.QV-UipdDXeUVdl05WruoEzBNPrQCfpu6OzJL0_QnDKY.name

Root cause was a wrong shortNameMax constant that failed to
account for the obligatory padding byte.

Fix the constant and also expand the TestLongnameStat test case
to test ALL file name lengths from 1-255 bytes.

Fixes https://github.com/rfjakob/gocryptfs/issues/143 .
2017-10-01 13:50:25 +02:00
Jakob Unterwurzacher
f59479736b tests: add diriv cache race test
Passes.
2017-08-10 21:01:19 +02:00
Jakob Unterwurzacher
d5133ca5ac fusefrontend_reverse: return ENOENT for undecryptable names
This was working until DecryptName switched to returning
EBADMSG instead of EINVAL.

Add a test to catch the regression next time.
2017-07-27 20:31:22 +02:00
Jakob Unterwurzacher
318c41827c tests: check if we close stderr and stdout correctly on mount
Currently fails, as reported at
https://github.com/rfjakob/gocryptfs/issues/130 .
2017-07-24 00:05:29 +02:00
Jakob Unterwurzacher
74e58ae8e6 tests: fsstress-gocryptfs.bash: sync up with EncFS
I have added a subset of fsstress-gocryptfs.bash to EncFS as
fsstress-encfs.sh, improving the code a bit.

This change forward-ports these improvements to
fsstress-gocryptfs.bash.
2017-07-21 23:34:44 +02:00
Jakob Unterwurzacher
3062de6187 fusefronted: enable writing to write-only files
Due to RMW, we always need read permissions on the backing file. This is a
problem if the file permissions do not allow reading (i.e. 0200 permissions).
This patch works around that problem by chmod'ing the file, obtaining a fd,
and chmod'ing it back.

Test included.

Issue reported at: https://github.com/rfjakob/gocryptfs/issues/125
2017-07-11 23:19:58 +02:00
Jakob Unterwurzacher
c12a50d4c8 benchmarks: add streaming read benchmark 2017-06-27 00:04:58 +02:00
Jakob Unterwurzacher
f44902aaae Fix two comments
One out-of-date and the other with a typo.
2017-06-01 18:53:57 +02:00
Jakob Unterwurzacher
e43eb36da3 tests: add v1.3-reverse example filesystem
We check the md5 sum of the encrypted version of a file to make sure we don't
accidentially change the ciphertext generation.
2017-05-30 17:04:46 +02:00
Jakob Unterwurzacher
18f354d84b main: password change: exit with code 12 on wrong password
We used to return code 8, now we return code 12 as documented in
the man page.

Also adds a test.
2017-05-14 13:14:00 +02:00
Jakob Unterwurzacher
d5adde1eeb exitcodes: pull all exit code definitions into the package
This commit defines all exit codes in one place in the exitcodes
package.

Also, it adds a test to verify the exit code on incorrect
password, which is what SiriKali cares about the most.

Fixes https://github.com/rfjakob/gocryptfs/issues/77 .
2017-05-07 22:16:22 +02:00
Jakob Unterwurzacher
ad7942f434 fusefrontend: implement path decryption via ctlsock
Closes https://github.com/rfjakob/gocryptfs/issues/84 .
2017-05-07 21:01:39 +02:00
Jakob Unterwurzacher
68387b470c Fix typos found by Misspell
Misspell Finds commonly misspelled English words
gocryptfs/internal/configfile/scrypt.go
Line 41: warning: "paramter" is a misspelling of "parameter" (misspell)
gocryptfs/internal/ctlsock/ctlsock_serve.go
Line 1: warning: "implementes" is a misspelling of "implements" (misspell)
gocryptfs/tests/test_helpers/helpers.go
Line 27: warning: "compatability" is a misspelling of "compatibility" (misspell)
2017-05-07 12:22:15 +02:00
Jakob Unterwurzacher
daada9d7c6 tests: support encfs in the fsstress script
May be helpful for https://github.com/vgough/encfs/issues/214 .
2017-05-01 23:50:49 +02:00
Jakob Unterwurzacher
9768376bd1 tests: add TestXfs124
This test reproduces the problem xfstests generic/124 uncovered.
The warning itself is harmless, but we should either (1) add locking
so that this cannot happen anymore or (2) drop the warning.

Currently fails:

$ go test -v
=== RUN   Test1980Tar
--- PASS: Test1980Tar (0.00s)
=== RUN   TestCtlSock
--- PASS: TestCtlSock (0.10s)
=== RUN   TestOpenTruncateRead
--- PASS: TestOpenTruncateRead (0.00s)
=== RUN   TestWORead
--- PASS: TestWORead (0.00s)
=== RUN   TestXfs124
cipherSize 18 == header size: interrupted write?
-wpanic turns this warning into a panic: cipherSize 18 == header size: interrupted write?
2017-05-01 18:44:03 +02:00
Jakob Unterwurzacher
9ab11aa4d7 fusefrontend: drop writeOnly flag
We do not have to track the writeOnly status because the kernel
will not forward read requests on a write-only FD to us anyway.

I have verified this behavoir manually on a 4.10.8 kernel and also
added a testcase.
2017-05-01 17:49:37 +02:00
Jakob Unterwurzacher
f1dbd19fe9 tests: add hkdf_sanity tests with broken example filesystem
These are deliberately corrupt.
2017-03-18 16:48:58 +01:00
Jakob Unterwurzacher
61502f9b94 benchmark: add md5sum read performance benchmark 2017-03-18 16:23:33 +01:00
Jakob Unterwurzacher
efc88346be cli: enable "-raw64" by default
This brings the CLI options back in sync with the default
feature flags.
2017-03-07 20:56:50 +01:00
Jakob Unterwurzacher
f1244b6d06 tests: recreate v1.3 example filesystem
The filesystem was created with a gocryptfs version that ignored
the HKDF flag (hence everything was actually encrypted WITHOUT hkdf).

Fix it by recreating it.
2017-03-07 20:56:50 +01:00
Jakob Unterwurzacher
2362e67a9e cli: add "-hkdf" option
This commit also enables actually passing the HKDF setting to
fusefrontend, this was missing till now.
2017-03-07 20:56:50 +01:00
Jakob Unterwurzacher
a80d798c2d tests: reverse: don't run tests that ignore "-plaintextnames" twice
TestMain() runs all tests twice, once with plaintextnames=true and once
with false. Several tests mount their own filesystem and ignore the
plaintextnames variable. It makes no sense to run them twice, so
skip execution when plaintextnames is set.
2017-03-07 20:53:58 +01:00
M. Vefa Bicakci
d48ccb3dda Report correct symbolic link dentry sizes
Prior to this commit, gocryptfs's reverse mode did not report correct
directory entry sizes for symbolic links, where the dentry size needs to
be the same as the length of a string containing the target path.

This commit corrects this issue and adds a test case to verify the
correctness of the implementation.

This issue was discovered during the use of a strict file copying program
on a reverse-mounted gocryptfs file system.
2017-03-07 20:46:58 +01:00
Jakob Unterwurzacher
b7538fc026 tests: add v1.3 example filesystem
This filesystem has both HKDF and Raw64 enabled.
2017-03-05 23:07:52 +01:00
Jakob Unterwurzacher
966308eeb7 Drop Go 1.4 compatability code everywhere
Yields a nice reduction in code size.
2017-03-05 17:44:14 +01:00