hardcoresushi/libgocryptfs
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218 Commits

Author SHA1 Message Date
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
6e9b6e17c3 tests: configfile: fix spurious test failure II 
internal/configfile/config_test.go:67: c declared and not used
 2017-03-05 23:24:47 +01:00
Jakob Unterwurzacher
b878306d2a tests: configfile: fix spurious test failure 
This test fails because Raw64 has been disabled for now.
 2017-03-05 23:15:50 +01:00
Jakob Unterwurzacher
a8fd8a2516 configfile: disable Raw64 for now 
Raw64 is supported (but was disabled by default) since gocryptfs
v1.2. However, the implementation was buggy because it forgot
about long names and symlinks.

Disable it for now by default and enable it later, together
with HKDF.
 2017-03-05 23:04:54 +01:00
Jakob Unterwurzacher
445b5019e3 nametransform: fix Raw64 not affecting symlink targets 
The symlink functions incorrectly hardcoded the padded
base64 variant.
 2017-03-05 22:59:25 +01:00
Jakob Unterwurzacher
5b54577d2e nametransform: fix Raw64 not affecting longnames 
HashLongName() incorrectly hardcoded the call to base64.URLEncoding.
 2017-03-05 22:25:41 +01:00
Jakob Unterwurzacher
d0bc7970f7 full stack: implement HKDF support 
...but keep it disabled by default for new filesystems.

We are still missing an example filesystem and CLI arguments
to explicitely enable and disable it.
 2017-03-05 21:59:55 +01:00
Jakob Unterwurzacher
4fadcbaf68 configfile: reject the "HKDF" flag for now 
This will be re-enabled once it is implemented.
 2017-03-05 18:16:49 +01:00
Jakob Unterwurzacher
decda6d255 configfile: switch on Raw64 by default 
As we have dropped Go 1.4 compatibility already, and will add
a new feature flag for gocryptfs v1.3 anyway, this is a good
time to enable Raw64 as well.
 2017-03-05 18:13:56 +01:00
Jakob Unterwurzacher
b732881518 configfile: switch to 128-bit IVs for master key encryption 
There is no security reason for doing this, but it will allow
to consolidate the code once we drop compatibility with gocryptfs v1.2
(and earlier) filesystems.
 2017-03-05 18:03:03 +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
Jakob Unterwurzacher
874e4fb5e9 cryptocore: rename "BackendTypeEnum" -> "AEADTypeEnum" 
There are two independent backends, one for name encryption,
the other one, AEAD, for file content.

"BackendTypeEnum" only applies to AEAD (file content), so make that
clear in the name.
 2017-03-05 17:10:57 +01:00
Jakob Unterwurzacher
e032539e2c cryptocore: use eme v1.1 interface 
Version 1.1 of the EME package (github.com/rfjakob/eme) added
a more convenient interface. Use it.

Note that you have to upgrade your EME package (go get -u)!
 2017-03-05 13:58:24 +01:00
Jakob Unterwurzacher
6cc0aebd71 configfile: define HKDF flag 2017-03-05 12:08:12 +01:00
Jakob Unterwurzacher
b2f3dbb8bd fusefrontend: when chown'ing a directory, also chown its diriv 
When filename encryption is active, every directory contains
a "gocryptfs.diriv" file. This file should also change the owner.

Fixes https://github.com/rfjakob/gocryptfs/issues/86
 2017-03-02 19:12:21 +01:00
Jakob Unterwurzacher
427c6c1719 exitcodes: define code 12 for "password incorrect" 2017-02-26 19:25:23 +01:00
Jakob Unterwurzacher
57612a278b configfile: rename "kdf.go" -> "scrypt.go" 
This really only handles scrypt and no other key-derivation functions.
Renaming the files prevents confusion once we introduce HKDF.

renamed:    internal/configfile/kdf.go -> internal/configfile/scrypt.go
renamed:    internal/configfile/kdf_test.go -> internal/configfile/scrypt_test.go
 2017-02-25 18:51:17 +01:00
Jakob Unterwurzacher
a65965783a stupidgcm: drop only external dependecy 
This makes it easier to use the package in external projects.

See https://github.com/rfjakob/gocryptfs/issues/79
 2017-02-24 09:46:10 +01:00
Jakob Unterwurzacher
43d6aa6677 speed: add benchmark.bash helper 2017-02-24 09:38:50 +01:00
Jakob Unterwurzacher
477071d673 speed: fix build for Go 1.4 and lower 
Old Go versions miss cipher.NewGCMWithNonceSize, which causes:

  internal/speed/speed.go:95: undefined: cipher.NewGCMWithNonceSize
 2017-02-23 00:04:51 +01:00
Jakob Unterwurzacher
1e03e059fa Implement "gocryptfs -speed" 
A crypto benchmark mode like "openssl speed".

Example run:

  $ ./gocryptfs -speed
  AES-GCM-256-OpenSSL 	 180.89 MB/s	(selected in auto mode)
  AES-GCM-256-Go      	  48.19 MB/s
  AES-SIV-512-Go      	  37.40 MB/s
 2017-02-22 23:56:34 +01:00
Jakob Unterwurzacher
62e7eb7d04 tests: reverse: check Access() call 2017-02-16 21:20:29 +01:00
Jakob Unterwurzacher
45c1ea499e fusefrontend_reverse: handle .name files in Access() 
These were currently passed to decryptPath() were it caused
a warning.
 2017-02-16 21:16:42 +01:00
Jakob Unterwurzacher
55d0523dbe tests: configfile: add missing newlines in verbose output 2017-02-16 19:45:20 +01:00
Jakob Unterwurzacher
8bbc1038fe syscallcompat: OSX compat: fix variable warnings 
As suggested by
https://github.com/rfjakob/gocryptfs/issues/15#issuecomment-279130217
 2017-02-16 19:23:17 +01:00
Jakob Unterwurzacher
3784901fce readpassword: limit password length to 1000 bytes 
This used to hang at 100% CPU:

    cat /dev/zero | gocryptfs -init a

...and would ultimately send the box into out-of-memory.

The number 1000 is chosen arbitrarily and seems big enough
given that the password must be one line.

Suggested by @mhogomchungu in https://github.com/rfjakob/gocryptfs/issues/77 .
 2017-02-13 09:13:22 +01:00
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
2dd90ac19c readpassword: improve comment on readPasswordStdin 2017-02-12 13:55:30 +01:00
Jakob Unterwurzacher
0f40afc832 ctlsock: handle non-canonical empty paths 
We have to check if the input path is empty AFTER canonicalizing it,
too!
 2017-02-05 18:17:30 +01:00
Jakob Unterwurzacher
8bcae63a5a ctlsock: sanitize: handle multiple leading slashes 2017-02-05 18:05:35 +01:00
Jakob Unterwurzacher
2bdd0ec802 golint comment fix 
internal/ctlsock/ctlsock_serve.go:73:1: comment on exported const
ReadBufSize should be of the form "ReadBufSize ..."
 2017-01-29 19:01:16 +01:00
Jakob Unterwurzacher
1273d7edae ctlsock: better error message for forward mode path decryption 2017-01-29 18:55:52 +01:00
Jakob Unterwurzacher
53fe6f5690 ctlsock: abort message processing on JSON error 
The code was missing a "continue" in that branch.

Also improve the error messages a bit.
 2017-01-29 18:25:46 +01:00
Jakob Unterwurzacher
532ef15417 ctlsock: interpret paths that point above CWD as "" 
Paths that start with ".." were previously accepted as-is.
 2017-01-29 15:24:47 +01:00
Jakob Unterwurzacher
6166dad05c readpassword: support spaces in "-passfile" filename 
...and while we are at it, also filenames starting with "-".
 2017-01-29 00:34:12 +01:00
Jakob Unterwurzacher
39eca53677 main: make sure the ctlsock file is deleted on incorrect password 
Otherwise the next try to mount ends in
"ctlsock: listen unix ctl.sock: bind: address already in use"
 2017-01-26 21:32:08 +01:00
Jakob Unterwurzacher
a7c7588deb fusefrontend: fix hard-linking with long name 
This used to incorrectly try to link twice and return EEXIST.
 2017-01-26 20:56:42 +01:00
Jakob Unterwurzacher
de87a256ab tlog: better comment for the terminal colors 2017-01-26 20:01:45 +01:00
Jakob Unterwurzacher
fe1705c55b reverse: add single-entry path cache 
Speeds up the "ls -lR" benchmark from 2.6 seconds to 2.0.
 2017-01-03 18:14:01 +01:00
Jakob Unterwurzacher
ef089c9f80 reverse: factor out rDecryptName 
This prepares the code for the introduction of a path cache.
 2017-01-03 17:46:11 +01:00
Jakob Unterwurzacher
8be54bf3f8 prefer_openssl: default to Go GCM on OSX 2016-12-10 21:04:17 +01:00
Jakob Unterwurzacher
12374be9c5 ctlsock: abort the connection if the request is too big 
Reading partial JSON would cause a mess. Just kill the connection.

Also, stop using syscall.PathMax that is not defined on Darwin
( https://github.com/rfjakob/gocryptfs/issues/15#issuecomment-264253024 )
 2016-12-10 20:43:08 +01:00
Jakob Unterwurzacher
8945f4db95 ctlsock: add a note about Accept() throwing errors on Close() 2016-12-10 15:01:00 +01:00
Jakob Unterwurzacher
6af725ff09 ctlsock: exit early if socket cannot be created; delete on exit 
Both are achieved by opening the socket from main and passing
it to the ctlsock package instead of passing the path.
 2016-12-10 14:54:06 +01:00
Jakob Unterwurzacher
967e7bd125 stupidgcm: Fix without_openssl build failure 
Also, always call build-without-openssl.bash from test.bash.

Failure was:

  internal/stupidgcm/without_openssl.go:29: missing return at end of function
 2016-12-10 13:15:19 +01:00
Jakob Unterwurzacher
2758c75cae ctlsock: sanitize paths before passing them to the backend 
You used to be able to crash gocryptfs by passing "/foo"
of "foo/" to the ctlsock.

Fixes https://github.com/rfjakob/gocryptfs/issues/66
 2016-12-10 12:59:54 +01:00
Jakob Unterwurzacher
c9f4400e6d Replace all calls to naked panic() with log.Panic() 
We want all panics to show up in the syslog.
 2016-12-10 11:54:36 +01:00
Jakob Unterwurzacher
55df8acac3 fusefrontend: preserve owner for symlinks 
https://github.com/rfjakob/gocryptfs/issues/64
 2016-11-28 23:15:24 +01:00
Jakob Unterwurzacher
e3c5e3f1c8 fusefronted: preserve owner for device nodes and sockets 
https://github.com/rfjakob/gocryptfs/issues/64
 2016-11-28 23:09:47 +01:00
Jakob Unterwurzacher
a66440c668 fusefrontend: use Lchown when preserving owner 
This prevents (unlikely) symlink race attacks
 2016-11-28 22:46:04 +01:00