hardcoresushi/libgocryptfs
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691 Commits

Author SHA1 Message Date
Jakob Unterwurzacher
f2d208c464 configfile: use map[flagIota] for feature flags 
This should make things saner and more extensible. It prepares
the infrastructure for "required feature flags" that will be used
to deprecate old gocryptfs version.
 2016-06-05 12:54:45 +02:00
Jakob Unterwurzacher
b97268c948 configfile: bake the "Creator" gocryptfs version into the file 
This field is added for the convenience of users and
may help them to identify which gocryptfs version
they need to mount a filesystem.

The same information is essentially contained in FeatureFlags,
but this is more difficult to decode for humans.

It is completely ignored programmatically (also by older gocryptfs
versions).
 2016-06-05 11:40:13 +02:00
Jakob Unterwurzacher
a602e798b1 fusefrontend: report an error if all files in a directory were invalid 
Just presenting an empty directory means that the user does not know
that things went wrong unless he checks the syslog or tries to delete
the directory.

It would be nice to report the error even if only some files were
invalid. However, go-fuse does not allow returning the valid
directory entries AND an error.
 2016-06-04 16:39:27 +02:00
Jakob Unterwurzacher
80b027f830 nametransform, main: better error messages 2016-06-01 20:07:43 +02:00
Jakob Unterwurzacher
5dd9576a11 fusefrontend: replace unreliable "fd < 0" check 
... with the "released" boolean.

For some reason, the "f.fd.Fd() < 0" check did not work reliably,
leading to nil pointer panics on the following wlock.lock().

The problem was discovered during fsstress testing and is unlikely
to happen in normal operations.

With this change, we passed 1700+ fsstress iterations.
 2016-05-30 09:36:06 +02:00
Jakob Unterwurzacher
5e9953ec27 toggledlog: wpanic: use Logger.Panic instead of naked panic 
This makes sure the panic message also ends up in syslog
(if enabled).
 2016-05-30 09:26:59 +02:00
Jakob Unterwurzacher
1648c54adb fusefrontend: use sync.Once for one-time warnings 
Using a simple boolean was racy (which was harmless
in this case) and non-idomatic.
 2016-05-29 22:50:03 +02:00
Jakob Unterwurzacher
fd53dfd2ad fusefronted: check Fstat return value on file create 
The Fstat call should never fail, but still, if it does return an error
it should be handled properly.
 2016-05-29 22:43:48 +02:00
Jakob Unterwurzacher
77813bdc13 fusefrontend: simplify wlockMap 
mapMutex can be anonymous and using an RWMutex is overkill
because the lock protects very short sections.
 2016-05-29 22:40:05 +02:00
Jakob Unterwurzacher
4c0cb37c50 fusefrontend: remove unused "forgotten" variable 
The functionality has long been replaced by the fd < 0
check.
 2016-05-29 13:46:47 +02:00
Jakob Unterwurzacher
888e147cd8 stupidgcm: add benchmark.bash wrapper 
Add a simple bash wrapper to make it easier to run the GCM
benchmarks.
 2016-05-22 15:49:09 +02:00
David Gnedt
a93bcabe9c Encrypt path in statfs() calls 
Paths in statfs() calls were not encrypted resulting in
an Function not implemented error, when the unencrypted
path didn't exist in the underlying (encrypted)
filesystem.

$ df plain/existingdir
df: ‘plain/existingdir’: Function not implemented
 2016-05-12 23:24:39 +02:00
Jakob Unterwurzacher
4ad9d4e444 prefer_openssl: add amd64 constraint 
Optimized assembly versions for Go GCM are only available
on amd64.
 2016-05-12 09:50:36 +02:00
Jakob Unterwurzacher
49b597f07c prefer_openssl: autodetect whether to use OpenSSL or Go GCM 
Go GCM is faster than OpenSSL if the CPU has AES instructions
and you are running Go 1.6+.

The "-openssl" option now defaults to "auto".

"gocryptfs -debug -version" displays the result of the autodetection.

See https://github.com/rfjakob/gocryptfs/issues/23 for details and
benchmarks.
 2016-05-12 00:42:42 +02:00
Jakob Unterwurzacher
ba7c798418 fusefrontend: fix panic due to concurrently unregistered wlock 
Commit 730291feab properly freed wlock when the file descriptor is
closed. However, concurrently running Write and Truncates may
still want to lock it. Check if the fd has been closed first.
 2016-05-08 23:21:20 +02:00
Jakob Unterwurzacher
730291feab fusefrontend: fix wlock memory leak 
The write lock was not freed on release, causing a slow memory leak.

This was noticed by running extractloop.bash for 10 hours.
 2016-05-05 13:38:39 +02:00
Jakob Unterwurzacher
cf29ce3762 stupidgcm: set dummy locking callback. 
In general, OpenSSL is only threadsafe if you provide a locking function
through CRYPTO_set_locking_callback. However, the GCM operations that
stupidgcm uses never call that function.

To guard against that ever changing, set a dummy locking callback
that crashes the app.
 2016-05-05 00:09:08 +02:00
Jakob Unterwurzacher
906172938a stupidgcm: skip tests on Go 1.4 and older 
Quoting from the patch:

	We compare against Go's built-in GCM implementation. Since stupidgcm only
	supports 128-bit IVs and Go only supports that from 1.5 onward, we cannot
	run these tests on older Go versions.
 2016-05-05 00:09:08 +02:00
Jakob Unterwurzacher
b4d45554f2 Revert "stupidgcm: print openssl error stack before panicing" 
This did not help in debugging the openssl <= 1.0.1c issue at all
and makes the code more complex. Keep it simple.
 2016-05-05 00:09:08 +02:00
Jakob Unterwurzacher
66156181ee cryptocore: support Go 1.4 in tests 2016-05-05 00:09:08 +02:00
Jakob Unterwurzacher
508a949d9d stupidgcm: reorder calls to support openssl <= 1.0.1c 
This fixes the test failures on Travis CI.

Quoting from 07a4ff79d2

	/* Set expected tag value. A restriction in OpenSSL 1.0.1c and earlier
	 * required the tag before any AAD or ciphertext */
 2016-05-05 00:08:25 +02:00
Jakob Unterwurzacher
d0945b73d2 stupidgcm: print openssl error stack before panicing 2016-05-04 20:50:13 +02:00
Jakob Unterwurzacher
6c010c3080 stupidgcm: fix copy-paste error in panic message 
Also, print the openssl version in Travis CI
 2016-05-04 20:15:11 +02:00
Jakob Unterwurzacher
39f3a24484 stupidgcm: completely replace spacemonkeygo/openssl 2016-05-04 19:56:07 +02:00
Jakob Unterwurzacher
c92190bf07 stupidgcm: add our own thin wrapper around openssl gcm 
...complete with tests and benchmark.

This will allow us to get rid of the dependency to spacemonkeygo/openssl
that causes problems on Arch Linux
( https://github.com/rfjakob/gocryptfs/issues/21 )
 2016-05-04 19:56:07 +02:00
Jakob Unterwurzacher
1bb907b38e cryptocore: add API tests 2016-05-04 19:56:07 +02:00
Jakob Unterwurzacher
4d79fba285 prelloc: warn and continue if fallocate(2) is not supported 
This makes gocryptfs work at all on ZFS.
See https://github.com/rfjakob/gocryptfs/issues/22 .
 2016-04-20 22:47:31 +02:00
Jakob Unterwurzacher
bd5405189e Fix "go tool vet -shadow=true" warnings 
Among those one real bug.
 2016-04-10 21:31:15 +02:00
Jakob Unterwurzacher
db72fcea41 longnames: fix fsstress failure, use dirfd 
Using dirfd-relative operations allows safe lockless handling
of the ".name" files.
 2016-04-10 21:31:08 +02:00
Jakob Unterwurzacher
63d3e51734 longnames: use symbolic constants instead of naked ints 2016-04-10 12:36:43 +02:00
Jakob Unterwurzacher
37a9b4c3ee Enable openssl in tests to support old Go versions 
Go 1.4 and older do not support 128-bit IVs which caused
the tests to panic.
 2016-03-03 00:59:58 +01:00
Jakob Unterwurzacher
b5221c9651 Fix Go 1.4 build failure caused by a refactoring oversight 2016-03-03 00:48:32 +01:00
Jakob Unterwurzacher
653d4a619c longnames part II: Rename, Unlink, Rmdir, Mknod, Mkdir + tests 2016-02-07 14:02:09 +01:00
Jakob Unterwurzacher
6b5d977cce Move OpenDir to fs_dir.go 2016-02-07 11:29:54 +01:00
Jakob Unterwurzacher
3a4922b5d7 Add tests for long name creation and renaming (currently failing, obviously) 2016-02-07 10:55:13 +01:00
Jakob Unterwurzacher
e111e20649 longnames part I: Create and OpenDir work with long filenames > 176 bytes 
Todo: Rename, Unlink, Rmdir, Mknod, Mkdir
 2016-02-06 22:54:14 +01:00
Jakob Unterwurzacher
6b27b6a1e7 Move dirIVCache to its own file 2016-02-06 20:27:28 +01:00
Jakob Unterwurzacher
c74772bc8d Run go fmt 2016-02-06 20:23:36 +01:00
Jakob Unterwurzacher
b0ee5258b1 Fix tests - were broken by the refactoring 2016-02-06 20:22:45 +01:00
Jakob Unterwurzacher
9078a77850 Move pathfs_frontend to internal/fusefrontend 
"git status" for reference:

renamed:    pathfs_frontend/args.go -> internal/fusefrontend/args.go
renamed:    pathfs_frontend/compat_darwin.go -> internal/fusefrontend/compat_darwin.go
renamed:    pathfs_frontend/compat_linux.go -> internal/fusefrontend/compat_linux.go
renamed:    pathfs_frontend/file.go -> internal/fusefrontend/file.go
renamed:    pathfs_frontend/file_holes.go -> internal/fusefrontend/file_holes.go
renamed:    pathfs_frontend/fs.go -> internal/fusefrontend/fs.go
renamed:    pathfs_frontend/fs_dir.go -> internal/fusefrontend/fs_dir.go
renamed:    pathfs_frontend/names.go -> internal/fusefrontend/names.go
renamed:    pathfs_frontend/write_lock.go -> internal/fusefrontend/write_lock.go
modified:   main.go
 2016-02-06 19:27:59 +01:00
Jakob Unterwurzacher
2b8cbd9441 Major refactoring: Split up "cryptfs" into several internal packages 
"git status" for reference:

deleted:    cryptfs/cryptfs.go
deleted:    cryptfs/names_core.go
modified:   integration_tests/cli_test.go
modified:   integration_tests/helpers.go
renamed:    cryptfs/config_file.go -> internal/configfile/config_file.go
renamed:    cryptfs/config_test.go -> internal/configfile/config_test.go
renamed:    cryptfs/config_test/.gitignore -> internal/configfile/config_test/.gitignore
renamed:    cryptfs/config_test/PlaintextNames.conf -> internal/configfile/config_test/PlaintextNames.conf
renamed:    cryptfs/config_test/StrangeFeature.conf -> internal/configfile/config_test/StrangeFeature.conf
renamed:    cryptfs/config_test/v1.conf -> internal/configfile/config_test/v1.conf
renamed:    cryptfs/config_test/v2.conf -> internal/configfile/config_test/v2.conf
renamed:    cryptfs/kdf.go -> internal/configfile/kdf.go
renamed:    cryptfs/kdf_test.go -> internal/configfile/kdf_test.go
renamed:    cryptfs/cryptfs_content.go -> internal/contentenc/content.go
new file:   internal/contentenc/content_api.go
renamed:    cryptfs/content_test.go -> internal/contentenc/content_test.go
renamed:    cryptfs/file_header.go -> internal/contentenc/file_header.go
renamed:    cryptfs/intrablock.go -> internal/contentenc/intrablock.go
renamed:    cryptfs/address_translation.go -> internal/contentenc/offsets.go
new file:   internal/cryptocore/crypto_api.go
renamed:    cryptfs/gcm_go1.4.go -> internal/cryptocore/gcm_go1.4.go
renamed:    cryptfs/gcm_go1.5.go -> internal/cryptocore/gcm_go1.5.go
renamed:    cryptfs/nonce.go -> internal/cryptocore/nonce.go
renamed:    cryptfs/openssl_aead.go -> internal/cryptocore/openssl_aead.go
renamed:    cryptfs/openssl_benchmark.bash -> internal/cryptocore/openssl_benchmark.bash
renamed:    cryptfs/openssl_test.go -> internal/cryptocore/openssl_test.go
new file:   internal/nametransform/name_api.go
new file:   internal/nametransform/names_core.go
renamed:    cryptfs/names_diriv.go -> internal/nametransform/names_diriv.go
renamed:    cryptfs/names_noiv.go -> internal/nametransform/names_noiv.go
renamed:    cryptfs/names_test.go -> internal/nametransform/names_test.go
new file:   internal/nametransform/pad16.go
renamed:    cryptfs/log.go -> internal/toggledlog/log.go
renamed:    cryptfs/log_go1.4.go -> internal/toggledlog/log_go1.4.go
renamed:    cryptfs/log_go1.5.go -> internal/toggledlog/log_go1.5.go
modified:   main.go
modified:   masterkey.go
modified:   pathfs_frontend/file.go
modified:   pathfs_frontend/file_holes.go
modified:   pathfs_frontend/fs.go
modified:   pathfs_frontend/fs_dir.go
modified:   pathfs_frontend/names.go
modified:   test.bash
 2016-02-06 19:22:35 +01:00