Commit Graph

44 Commits

Author SHA1 Message Date
Jakob Unterwurzacher
1bc1db620b fusefrontend: -sharedstorage: present stable inode numbers
Use the Gen field (inode generation) to distinguish hard links
while passing the real inode numbers to userspace.

Fixes https://github.com/rfjakob/gocryptfs/issues/584
2021-07-31 13:24:25 +02:00
Jakob Unterwurzacher
05b813f202 nametransform: rename BadNameFlag to BadnameSuffix 2021-06-21 12:12:44 +02:00
DerDonut
a611810ff4 Badname file content access
This proposal is the counterpart of the modifications from the `-badname`
parameter. It modifies the plain -> cipher mapping for filenames when using
`-badname` parameter. The new function `EncryptAndHashBadName` tries to find a
cipher filename for the given plain name with the following steps:

1. If `badname` is disabled or direct mapping is successful: Map directly
(default and current behaviour)

2. If a file with badname flag has a valid cipher file, this is returned
(=File just ends with the badname flag)

3. If a file with a badname flag exists where only the badname flag was added,
this is returned (=File cipher name could not be decrypted by function
`DecryptName` and just the badname flag was added)

4. Search for all files which cipher file name extists when cropping more and
more characters from the end. If only 1 file is found, return this

5. Return an error otherwise

This allows file access in the file browsers but most important it allows that
you rename files with undecryptable cipher names in the plain directories.
Renaming those files will then generate a proper cipher filename One
backdraft: When mounting the cipher dir with -badname parameter, you can never
create (or rename to) files whose file name ends with the badname file flag
(at the moment this is " GOCRYPTFS_BAD_NAME"). This will cause an error.

I modified the CLI test function to cover additional test cases. Test [Case
7](https://github.com/DerDonut/gocryptfs/blob/badnamecontent/tests/cli/cli_test.go#L712)
cannot be performed since the cli tests are executed in panic mode. The
testing is stopped on error. Since the function`DecryptName` produces internal
errors when hitting non-decryptable file names, this test was omitted.

This implementation is a proposal where I tried to change the minimum amount
of existing code. Another possibility would be instead of creating the new
function `EncryptAndHashBadName` to modify the signature of the existing
function `EncryptAndHashName(name string, iv []byte)` to
`EncryptAndHashName(name string, iv []byte, dirfd int)` and integrate the
functionality into this function directly. You may allow calling with dirfd=-1
or other invalid values an then performing the current functionality.
2021-06-20 18:09:21 +02:00
Jakob Unterwurzacher
255a71c917 tests: MountOrFatal creates mnt dir itself
Allows to drop a few Mkdir()s.
2021-03-20 10:33:34 +01:00
Jakob Unterwurzacher
952d45ce84 tests: add TestDiskFull
Also fix incomplete uid restoration in TestSupplementaryGroups
and replace syscall.Setregid and friends with unix.Setregid and
friends.

This test is added to check if have problems handling a full disk.
The ticket https://github.com/rfjakob/gocryptfs/issues/550 states
that the full disk was not where the backing gocryptfs filesystem
was, but this has no effect on gocryptfs, so we test the harder
case.
2021-03-12 19:25:25 +01:00
Jakob Unterwurzacher
e2dc52a965 v2api: -sharestorage: disable hard link tracking & add tests
Hard link tracking was not correctly disabled
since the migration to the go-fuse v2 api.

Add a test to ensure it stays off.

Fixes https://github.com/rfjakob/gocryptfs/issues/525
2021-03-07 17:22:29 +01:00
Jakob Unterwurzacher
bed60101f4 nametransform: make gocryptfs.diriv and gocryptfs.xxx.name files world-readable
Make `gocryptfs.diriv` and `gocryptfs.xxx.name` files world-readable to make encrypted backups easier
when mounting via fstab.

Having the files follow chmod/chown of their parent does not seem
to be worth the hassle. The content of the diriv files is not
secret, and both diriv and name files are protected by the
perms of the parent dir.

Fixes https://github.com/rfjakob/gocryptfs/issues/539
2021-01-10 08:07:10 +01:00
Jakob Unterwurzacher
993b19c19c gocryptfs -init: fix wrong exit code on non-empty dir
Fixes https://github.com/rfjakob/gocryptfs/pull/503
2020-09-06 11:35:25 +02:00
Jakob Unterwurzacher
3b61244b72 tests: TestBadname: simplify test by using empty files
Simplify the tests by using empty files. Empty
files are valid, and we don't check the content
anyway.

Also adjust comment style a little and add
a missing break statement.
2020-06-06 12:53:45 +02:00
DerDonut
a8230d271f Added auto decryption of invalid file names
Changed invalid file decoding and decryption. Function
DecryptName now shortens the filename until the filename is
decodable and decryptable. Will work with valid **and**
invalid Base64URL delimiter (valid delimiter [0-9a-zA-z_\\-].
If the filename is not decryptable at all, it returns the
original cipher name with flag suffix Changed cli tests to
generate decryptable and undecryptable file names with correct
encrypted content. Replacing #474, extends #393
2020-06-06 12:20:31 +02:00
Jakob Unterwurzacher
416080203b main: accept multiple -passfile options
Each file will be read and then concatenated
for the effictive password. This can be used as a
kind of multi-factor authenticiton.

Fixes https://github.com/rfjakob/gocryptfs/issues/288
2020-05-17 19:31:04 +02:00
Jakob Unterwurzacher
3ef563493a tests: add TestPasswdMasterkeyStdin
Tests that `gocryptfs -passwd -masterkey=stdin` works.
This was fixed by ff04b1d83a.

Fixes https://github.com/rfjakob/gocryptfs/issues/461
2020-05-09 16:53:25 +02:00
Jakob Unterwurzacher
5dbf376860 tests: cli: rename TestBypass -> TestBadname
The command line option is now called `-badname`,
so adjust the test name to match.
2020-05-09 15:29:21 +02:00
orcas
9ec042f2f6 Show undecryptable filenames if they match supplied glob
Resolves https://github.com/rfjakob/gocryptfs/issues/393
2020-02-28 22:17:59 +01:00
Jakob Unterwurzacher
dc21cd3572 tests: cli: add TestSymlinkedCipherdir
https://github.com/rfjakob/gocryptfs/issues/450
2020-01-25 16:54:57 +01:00
Jakob Unterwurzacher
1fb18f4a9e tests: filter leaked fds by prefix
When running

  $ go test ./tests/matrix/

in isolation, it failed like this:

  fd leak? before, after:
  [0r=/dev/null 3w=/dev/null 5r=/proc/8078/fd (hidden:4)]
  [0r=/dev/null 3w=/dev/null 5w=/tmp/go-build366655199/b001/testlog.txt 7r=/proc/8078/fd (hidden:4)]

Filter by prefix to get rid of this spurious test failure.
2019-10-06 19:37:51 +02:00
Jakob Unterwurzacher
d361f6e35b tests: clarify which process seems to be leaking fds
The tests check if they leak fds themselves, but we also
check if gocryptfs leaks fds. Clarify what is what in the
error message.
2019-10-06 18:48:09 +02:00
Jakob Unterwurzacher
ce13851bbf tests: add TestNotIdle
Mount with idle timeout of 100ms read something every 10ms. The fs should
NOT get unmounted. Regression test for https://github.com/rfjakob/gocryptfs/issues/421
2019-09-08 16:16:18 +02:00
Jakob Unterwurzacher
991adfc934 -passwd now takes a passed -scryptn flag into account
https://github.com/rfjakob/gocryptfs/issues/400
2019-05-13 23:01:44 +02:00
Jakob Unterwurzacher
fe06e9f456 readpassword: delete CheckTrailingGarbage
CheckTrailingGarbage was called even when "-passfile" was
used, which is stupid, and causes false positives:

https://github.com/rfjakob/gocryptfs/issues/391
(false error "Received trailing garbage after the password"
when using -passfile in .bash_profile)

Instead of trying to improve the logic to handle that case
and make everything even more complicated, delete the function.

It is unclear if actually helps in some cases, and it definitely
harms as shown by the above bug report.
2019-04-08 20:18:45 +02:00
Jakob Unterwurzacher
8f2723b387 Allow "nofail" for /etc/fstab use 2019-03-31 14:33:02 +02:00
Jakob Unterwurzacher
ec17445b99 forward mode: create gocryptfs.diriv files with 0440 permissions
Makes it easier to share an encrypted folder via a network drive.

https://github.com/rfjakob/gocryptfs/issues/387
2019-03-30 20:06:40 +01:00
Jakob Unterwurzacher
887d5aa8e7 tests: teach ListFds() to check other processes 2019-01-01 20:05:38 +01:00
Jakob Unterwurzacher
e537ecbe2e tests: fix golint error
Error was:

  tests/cli/cli_test.go:552: declaration of "err" shadows declaration at tests/cli/cli_test.go:544
2018-10-11 20:57:52 +02:00
Jakob Unterwurzacher
04241455a2 tests: add idle timeout test
Mount with idle timeout 10ms and check that the process exits by itself
within 5 seconds.
2018-10-11 20:43:28 +02:00
Jakob Unterwurzacher
5ca6243eeb main: sanitize commas from fsname
The cipherdir path is used as the fsname, as displayed
in "df -T". Now, having a comma in fsname triggers a sanity check
in go-fuse, aborting the mount with:

  /bin/fusermount: mount failed: Invalid argument
  fuse.NewServer failed: fusermount exited with code 256

Sanitize fsname by replacing any commas with underscores.

https://github.com/rfjakob/gocryptfs/issues/262
2018-09-18 19:39:52 +02:00
Jakob Unterwurzacher
ca24c20694 main: don't read the config file twice (fix pipe bug)
Instead, first Load() the file, then DecryptMasterKey().

Fixes https://github.com/rfjakob/gocryptfs/issues/258
2018-09-08 13:04:33 +02:00
Jakob Unterwurzacher
2bdf7d5172 configfile: add LoadAndDecrypt wrapper
Callers that do not want to decrypt the masterkey should
call plain Load().

https://github.com/rfjakob/gocryptfs/issues/258
2018-09-08 12:40:29 +02:00
Jakob Unterwurzacher
ec2fdc19cf reverse mode: add --exclude option
https://github.com/rfjakob/gocryptfs/issues/235
2018-08-11 23:26:49 +02:00
Jakob Unterwurzacher
91de77943f configfile: reduce function name stutter
configfile.LoadConfFile()   -> configfile.Load()
configfile.CreateConfFile() -> configfile.Create()
2018-07-01 20:56:22 +02:00
Jakob Unterwurzacher
53d6a9999d main: accept -dev, -nodev, -suid, -nosuid, -exec, -noexec
When mounted via /etc/fstab like this,

  /a /b fuse.gocryptfs default 0 0

we always get extra options passed. As reported by @mahkoh
at https://github.com/rfjakob/gocryptfs/pull/233 :

  mount passes `-o noexec` if `-o user` is set and `-o exec` is not set.
  If both `-o user` and `-o exec` are set, it passes `-o exec`.

Make these options work, and in addtion, also make -suid and -rw
work the same way.

Reported-by: @mahkoh
2018-06-07 22:50:30 +02:00
Jakob Unterwurzacher
e29a81efc3 main: make prefixOArgs errors testable
By returning an error instead of calling os.Exit,
error cases can be tested easily. Error cases
were not tested until now.
2018-06-05 21:02:35 +02:00
Jakob Unterwurzacher
9d7392a5be tests: cli_test: fix fd leak
One fd leak found in TestMountBackground.
2018-04-07 15:46:41 +02:00
Jakob Unterwurzacher
f28d85fad5 fsck: add initial implementation
Most corruption cases except xattr should be covered.
With test filesystem.

The output is still pretty ugly. xattr support will
be added in the next commits.
2018-04-02 16:38:18 +02:00
Jakob Unterwurzacher
8fcd39a3b0 main: add "-fsck" flag
The fsck operation is not yet implemented, this commits
just adds the flag and improves cli flag handling.
2018-04-01 14:25:10 +02:00
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
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
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
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
8adfbf2dc3 Check for trailing garbage after the password
From the comment:

// CheckTrailingGarbage tries to read one byte from stdin and exits with a
// fatal error if the read returns any data.
// This is meant to be called after reading the password, when there is no more
// data expected. This helps to catch problems with third-party tools that
// interface with gocryptfs.
2017-02-12 17:59:09 +01:00
Jakob Unterwurzacher
4866785f4b tests: add test for -password -masterkey
Also, make the other password tests more rigorous by verifying the
fs content.
2016-10-16 19:13:00 +02:00
Jakob Unterwurzacher
ca3cc5eca3 tests: fix stdin password change test
It was actually testing extpass a second time.
2016-10-16 18:13:26 +02:00
Jakob Unterwurzacher
57e8df990c tests: split "normal" tests into "cli" and "defaults"
Also fixes the failure to run the benchmarks do to the missing
gocryptfs.diriv.
2016-10-16 15:04:53 +02:00