hardcoresushi/libgocryptfs
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123 Commits

Author SHA1 Message Date
Jakob Unterwurzacher
e9bb8b800c reverse: switch from GCM-SIV to AES-SIV 
GCM-SIV is not yet finalized, and the reference implemenation is
painfully slow at about 2 MB/s. Switch to AES-SIV.
 2016-09-26 23:25:13 +02:00
Jakob Unterwurzacher
5f4b16c00f Implement changes proposed by gosimple. 
Also delete the unused "dirIVNameStruct", found by deadcode.
 2016-09-25 19:48:21 +02:00
Jakob Unterwurzacher
2050c7f3b3 reverse: add gcmsiv flag and associated tests 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
d76e7aadb4 reverse: use dynamic inode numbers 
...with stable mappings for hard-linked files.
 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
5f726aaa9d contentenc: add GCM-SIV support 
Also add ReverseDummyNonce nonce generation.
 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
7f87ed78f2 cryptocore: add support for GCM-SIV 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
72efa5c9b1 main: move initDir into its own file 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
9ad49088fa main: add explicit exit after forkChild 
Trying to make it more obvious what is happening.
 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
d9db75ebd2 main: factor out cli arg parsing 
The main function has gotten way too big.
 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
a34b447ad1 reverse: let the kernel enforce read-only mode 
... and print a warning that reverse mode is experimental
 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
1d4c6288f2 main: initial support for reverse mode 2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
0d5d6fc99b main: bake build date into version string 
$ gocryptfs -version
gocryptfs v0.12-36-ge021b9d-dirty; go-fuse a4c968c; 2016-07-03 go1.6.2
 2016-07-03 16:50:52 +02:00
Jakob Unterwurzacher
e021b9d00c main: yellow text for masterkey and zerokey warnings 
Also, mention that the shell may save the command line into the
history and reduce "ps -auxwww" to "ps ax" (that's all you need).
 2016-07-03 15:37:47 +02:00
Jakob Unterwurzacher
547ddf4264 tlog: switch default logger to syslog 
...unless "-nosyslog" is passed.

All gocryptfs messages already go to syslog, but the messages
that the go-fuse lib emits were still printed to stdout.

Fixes issue #13 ( https://github.com/rfjakob/gocryptfs/issues/13 )
 2016-06-26 23:30:22 +02:00
Jakob Unterwurzacher
15b88756ad main: add "-o" option to enable "suid" and "dev" 
Device files and suid binaries are often not needed when running
gocryptfs as root. As they are potentially dangerous, let the
user enable them explicitely via the new "-o" option instead of
always enabling them when running as root.
 2016-06-26 23:03:18 +02:00
Jakob Unterwurzacher
0115588680 main, fusefrontend: enable suid functionality 
FUSE filesystems are mounted with "nosuid" by default. If we run as root,
we can use device files by passing the opposite mount option, "suid".

Also we have to use syscall.Chmod instead of os.Chmod because the
portability translation layer "syscallMode" messes up the sgid
and suid bits.

Fixes 70% of the failures in xfstests generic/193. The remaining are
related to truncate, but we err on the safe side:

    $ diff -u tests/generic/193.out /home/jakob/src/fuse-xfstests/results//generic/193.out.bad
    [...]
     check that suid/sgid bits are cleared after successful truncate...
     with no exec perm
     before: -rwSr-Sr--
    -after:  -rw-r-Sr--
    +after:  -rw-r--r--
 2016-06-26 20:13:21 +02:00
Jakob Unterwurzacher
fb5e7023ee main: enable device files when running as root 
FUSE filesystems are mounted with "nodev" by default. If we run as root,
we can use device files by passing the opposite mount option, "dev".

Fixes xfstests generic/184.
 2016-06-26 19:23:33 +02:00
Jakob Unterwurzacher
23cc0657f4 fusefronted: preserve owner if running as root 
If allow_other is set and we run as root, try to give newly created files to
the right user.
 2016-06-26 19:18:13 +02:00
Jakob Unterwurzacher
b558901e66 Drop deprecated "-gcmiv128" option 
The GCMIV128 feature flag is already mandatory, dropping the command
line option is the final step.

Completes https://github.com/rfjakob/gocryptfs/issues/29 .
 2016-06-23 22:10:19 +02:00
Jakob Unterwurzacher
3d59a72ba9 Drop deprecated "-emenames" option 
The EMENames feature flag is already mandatory, dropping the command
line option is the final step.
 2016-06-23 21:56:50 +02:00
Jakob Unterwurzacher
b17f0465c7 Drop deprecated "-diriv" option 
The DirIV feature flag is already mandatory, dropping the command
line option is the final step.
 2016-06-23 21:38:59 +02:00
Jakob Unterwurzacher
f0b4d2354d Refuse mounting of v0.6 and older filesystems 2016-06-19 20:01:04 +02:00
Jakob Unterwurzacher
1dcafb99ff main: drop "on-disk format" from -version output, add Go version 
As v0.4 introduced ext4-style feature flags, the on-disk format version
is unlinkely to change. Drop it from the version output to reduce
clutter. Use "gocryptfs -version -debug" to see it.

Add the Go version string because only Go 1.6 and newer have an optimized
AES-GCM implementation. This will help users to understand the performance
of their build.
 2016-06-19 19:33:15 +02:00
Jakob Unterwurzacher
cc2a75b050 Mount v0.6 and older filesystems as read-only 
This is part of the phase-out of very old filesystems.

See https://github.com/rfjakob/gocryptfs/wiki/Compatibility for
more info.
 2016-06-16 23:23:09 +02:00
Jakob Unterwurzacher
82d87ff8ed Add "-ro" (read-only) flag 
From the man page:

  **-ro**
  :      Mount the filesystem read-only

Also add a test.
 2016-06-16 21:29:22 +02:00
Jakob Unterwurzacher
6c3f97399a Rename internal "toggledlog" package to "tlog" 
tlog is used heavily everywhere and deserves a shorter name.

Renamed using sed magic, without any manual rework:

   find * -type f -exec sed -i 's/toggledlog/tlog/g' {} +
 2016-06-15 23:30:44 +02:00
Jakob Unterwurzacher
09e88f31d1 toggledlog: assume command of color handling 
We want to use colored error messages also outside of main,
so let's handle it in the logging package.

The fatal logger now automatically prints red.
 2016-06-15 23:17:51 +02:00
Jakob Unterwurzacher
c89455063c readpassword: create internal package for password reading 
* Supports stdin
* Add tests for extpass and stdin

As per user request at https://github.com/rfjakob/gocryptfs/issues/30
 2016-06-15 22:44:24 +02:00
Jakob Unterwurzacher
393e531afd Fix warnings reported by Go 1.6 "go tool vet -shadow=true" 
Warnings were:

  main.go:234: declaration of err shadows declaration at main.go:163:
  internal/fusefrontend/file.go:401: declaration of err shadows declaration at internal/fusefrontend/file.go:379:
  internal/fusefrontend/file.go:419: declaration of err shadows declaration at internal/fusefrontend/file.go:379:
  internal/fusefrontend/fs_dir.go:140: declaration of err shadows declaration at internal/fusefrontend/fs_dir.go:97:
 2016-06-14 22:46:23 +02:00
Jakob Unterwurzacher
0c80cca674 toggledlog: convert remaing naked fmt.Print* 
Several fatal errors were just printed to stdout, which
meant they were invisible when running the test suite.

Fix this by introducing toggledlog.Fatal and convert as
follows:

Fatal errors     -> toggledlog.Fatal
Warnings         -> toggledlog.Warn
Password prompts -> fmt.Fprintf
 2016-06-05 14:32:07 +02:00
Jakob Unterwurzacher
ca54b665e3 main: print actual error from LoadConfFile() 
It may not have been a "Wrong password" after all.

Also, push down disabling the warning so LoadConfFile() can
warn about things that matter.
 2016-06-05 13:44:22 +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
281bb8daf0 main: don't tell the user to choose a password when -extpass is used 
Instead, print this:

  Using password provided via -extpass.
 2016-06-04 15:24:42 +02:00
Jakob Unterwurzacher
2e2ee0a038 main: print relative path in the init success message 
... but only if the relative path does not start with "..".

Makes the message easier to grasp. Example:

  $ gocryptfs -init -scryptn=10 v0.9
  [...]
  The filesystem has been created successfully.

Before:
  You can now mount it using: gocryptfs /home/jakob/src/github.com/rfjakob/gocryptfs/integration_tests/example_filesystems/v0.9 MOUNTPOINT

After:
  You can now mount it using: gocryptfs v0.9 MOUNTPOINT
 2016-06-04 15:04:57 +02:00
Jakob Unterwurzacher
80b027f830 nametransform, main: better error messages 2016-06-01 20:07:43 +02:00
Jakob Unterwurzacher
e7f78135b3 Add "-allow_other" command-line option 
As requested in https://github.com/rfjakob/gocryptfs/issues/26 ,
this adds the option to allow other users to access the filesystem.
 2016-05-18 19:30:05 +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
36c1039228 build.bash: bake the go-fuse commit hash into the binaries 2016-04-10 23:16:09 +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
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
c74772bc8d Run go fmt 2016-02-06 20:23:36 +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
Jakob Unterwurzacher
6454db68d9 Add new "-wpanic" option and enable it for the automated tests 2016-01-31 18:09:39 +01:00
Jakob Unterwurzacher
9ecb489c66 Allow "-d" as an alis for "-debug", and "-quiet" as an alias for "-q" 2016-01-24 18:20:04 +01:00
Jakob Unterwurzacher
523e430685 Add "-nosyslog" options 
Also, actually redirect Warn and Debug as well.
 2016-01-24 18:10:18 +01:00
Jakob Unterwurzacher
1030522fe6 Suppress password prompt when using -extpass 
Also, add color to the error messages.
 2016-01-23 20:18:39 +01:00
Jakob Unterwurzacher
2e419e635f Remove last SetOutput from generic code 2016-01-22 21:49:56 +01:00
Jakob Unterwurzacher
cec2da3e33 Add "-memprofile" option 2016-01-21 23:55:37 +01:00