Commit Graph

78 Commits

Author SHA1 Message Date
Jakob Unterwurzacher
9e69334400 v2api: set NullPermissions = true
Don't let go-fuse mess úp 0000 permissions.
2020-07-12 20:39:19 +02:00
Jakob Unterwurzacher
a39fc8ab2e v2api: fix crash on umount
fs.Mount already called srv.Serve() for us.
2020-07-08 22:21:27 +02:00
Jakob Unterwurzacher
2aad58f9ec v2api (go-fuse v2 api): initial noop implementation
Compiles and mounts but does nothing useful.
2020-06-21 12:01:24 +02:00
Jakob Unterwurzacher
ec74d1d2f4 Update go-fuse import path to github.com/hanwen/go-fuse/v2
We need
fd7328faf9
to fix a crash reported in https://github.com/rfjakob/gocryptfs/issues/430 :

  2019/10/30 17:14:16 Unknown opcode 2016
  panic: runtime error: invalid memory address or nil pointer dereference
  [signal SIGSEGV: segmentation violation code=0x1 addr=0x20 pc=0x508d38]

This patch is only in the v2.x.x branch. Upgrade to v2, as the
old API is also supported there.

Running

  git grep hanwen/go-fuse | grep -v hanwen/go-fuse/v2

to check for forgotten references comes back clean.
2020-05-17 14:23:47 +02:00
Jakob Unterwurzacher
16221facb9 ctlsock: create exported ctlsock client library
The former interal ctlsock server package is renamed
to ctlsocksrv.
2020-05-09 17:36:41 +02:00
Jakob Unterwurzacher
ff04b1d83a main: untangle -masterkey handling and config loading
This was handled both in getMasterKey(). Split it apart.
2020-05-09 16:53:12 +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
a48d7fac2c main: haveFusermount2: respect PATH environment variable
Use exec.LookPath() to find fusermount in the user's PATH
first. Fall back to /bin/fusermount for the case that PATH
is not set, like go-fuse does.

Fixes https://github.com/rfjakob/gocryptfs/issues/448
2020-01-14 23:12:56 +01:00
Jakob Unterwurzacher
db43bfc4c0 main: detect fusermount3 and don't add nonempty
fusermount3 (i.e. fusermount from libfuse 3.x) has dropped
the `nonempty` option.

Detect fusermount3 and don't add `nonempty` in this case.

Fixes https://github.com/rfjakob/gocryptfs/pull/440
2019-12-28 23:51:45 +01:00
Jakob Unterwurzacher
0a4db7d9e9 Fix -idle unmounting despite activity
Fixes https://github.com/rfjakob/gocryptfs/issues/421
2019-09-08 16:29:20 +02:00
Jakob Unterwurzacher
f1b538ef24 Fix "constant 2435016766 overflows int32" build failure on arm
Cast to uint32 to fix the int32 overflow, and define BTRFS_SUPER_MAGIC
locally to fix the next failure on darwin.
2019-08-04 19:43:07 +02:00
Jakob Unterwurzacher
b1d09b0f17 Rename isDirEmpty -> isEmptyDir
The function actually answers the question:
"is this an empty dir"?
2019-08-04 14:13:00 +02:00
Jakob Unterwurzacher
13055278f5 Force -noprealloc on Btrfs
Preallocation on Btrfs is broken ( https://github.com/rfjakob/gocryptfs/issues/395 ,
https://lore.kernel.org/linux-btrfs/CAPv9Zmk46As_P9Gyf_icET53xRda63h7iC1meES9xbdDEt9qow@mail.gmail.com/ )
and slow ( https://github.com/rfjakob/gocryptfs/issues/63 ).
2019-08-04 13:46:33 +02:00
Eduardo M KALINOWSKI
3bc100aeb3 reverse mode: support wildcard exclude (--exclude-wildcard)
This adds support for gitignore-like wildcards and exclude patters in
reverse mode. It (somewhat) fixes #273: no regexp support, but the
syntax should be powerful enough to satisfy most needs.

Also, since adding a lot of --exclude options can be tedious, it adds
the --exclude-from option to read patterns from a file (or files).
2019-03-26 20:56:37 +01:00
Sebastian Lackner
8a520ee77f mount: Replace commas in volume name.
Fixes the following test failure:

    cli_test.go:534: Failed to mount "[...]/542399800,foo,bar" on "[...]/542399800,foo,bar.mnt": exit status 19
2019-01-15 22:08:20 +01:00
Jakob Unterwurzacher
3cd892ccde main: also redirect Fatal logger to syslog on daemonization
The messages would still be collected via gocryptfs-logger,
but let's do it right.

Before:

  Oct 17 21:58:12 brikett gocryptfs[9926]: testing info
  Oct 17 21:58:12 brikett gocryptfs[9926]: testing warn
  Oct 17 21:58:12 brikett gocryptfs-9926-logger[9935]: testing fatal

After:

  Oct 17 22:00:53 brikett gocryptfs[10314]: testing info
  Oct 17 22:00:53 brikett gocryptfs[10314]: testing warn
  Oct 17 22:00:53 brikett gocryptfs[10314]: testing fatal
2018-10-17 22:18:03 +02:00
Jesse Dunietz
87d3ed9187 Add option for autounmount
Even though filesystem notifications aren't implemented for FUSE, I decided to
try my hand at implementing the autounmount feature (#128). I based it on the
EncFS autounmount code, which records filesystem accesses and checks every X
seconds whether it's idled long enough to unmount.

I've tested the feature locally, but I haven't added any tests for this flag.
I also haven't worked with Go before. So please let me know if there's
anything that should be done differently.

One particular concern: I worked from the assumption that the open files table
is unique per-filesystem. If that's not true, I'll need to add an open file
count and associated lock to the Filesystem type instead.

https://github.com/rfjakob/gocryptfs/pull/265
2018-10-11 20:16:45 +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
ec2fdc19cf reverse mode: add --exclude option
https://github.com/rfjakob/gocryptfs/issues/235
2018-08-11 23:26:49 +02:00
Jakob Unterwurzacher
52c9ff1ded main: improve fuse.NewServer error message
Before: fuse.NewServer failed: "fusermount exited with code 256\n"
After:  fuse.NewServer failed: fusermount exited with code 256
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
bcc8378a2c Fix the easy golint warnings
Reported by https://goreportcard.com/report/github.com/rfjakob/gocryptfs
2018-04-08 20:26:25 +02:00
Jakob Unterwurzacher
93849e28d8 main: move getMasterKey into initFuseFrontend
This is where the results are used, so call it
there.

This simplifies doMount a bit because we can get
rid of the block protecting masterkey.
2018-04-01 15:47:35 +02:00
Jakob Unterwurzacher
a4f3a7dca2 main: move masterkey logic into new helper getMasterKey
The new helper will also be used by fsck.
2018-04-01 14:51:53 +02:00
Jakob Unterwurzacher
85056def90 main: move and rename checkDir*() helper
To avoid confusion with fsck, rename to isDir*()
and move the functions into init_dir.go.
2018-04-01 12:31:44 +02:00
Jakob Unterwurzacher
9bc039a4ba Add -masterkey=stdin functionality
https://github.com/rfjakob/gocryptfs/issues/218
2018-03-22 00:02:10 +01:00
Jakob Unterwurzacher
b96e3ee271 tlog: stop embedding log.Logger to prevent mistakes
A few places have called tlog.Warn.Print, which directly
calls into log.Logger due to embedding, losing all features
of tlog.

Stop embedding log.Logger to make sure the internal functions
cannot be called accidentially and fix (several!) instances
that did.
2018-02-28 09:02:18 +01:00
Jakob Unterwurzacher
14c063428d main: doMount: use a deferred function for wipeKeys
Also drop the unused int return.
2018-02-18 12:55:20 +01:00
Jakob Unterwurzacher
5b5c7a0a5d main: overwrite keys and let them run out of scope
As soon as we don't need them anymore, overwrite
keys with zeros. Make sure they run out of scope
so we don't create a risk of inadvertedly using
all-zero keys for encryption.

https://github.com/rfjakob/gocryptfs/issues/211
2018-02-18 12:42:22 +01:00
Jakob Unterwurzacher
18f6c6106c main: try to wipe cryptocore's secret keys on unmount
Raise the bar for recovering keys from memory.

https://github.com/rfjakob/gocryptfs/issues/211
2018-02-18 11:39:10 +01:00
Jakob Unterwurzacher
719693ec5d fusefrontend[_reverse]: move crypto init up to caller
Both fusefrontend and fusefrontend_reverse were doing
essentially the same thing, move it into main's
initFuseFrontend.

A side-effect is that we have a reference to cryptocore
in main, which will help with wiping the keys on exit
(https://github.com/rfjakob/gocryptfs/issues/211).
2018-02-18 11:21:58 +01:00
Jakob Unterwurzacher
bac7ef4834 MacOS: rely on OSXFuse to create the mountpoint
As reported in https://github.com/rfjakob/gocryptfs/issues/194 ,
OSXFuse creates the mountpoint if it does not exist.
2018-01-20 13:42:29 +01:00
Jakob Unterwurzacher
7d477d692b MacOS: rely on OSXFuse to create mountpoint below /Volumes
OSXFuse automatically creates the mountpoint if it is
below /Volumes because this would require root permissions
which the user might not have.

Reported at https://github.com/rfjakob/gocryptfs/issues/194
2018-01-16 23:18:53 +01:00
Jakob Unterwurzacher
e36a0ebf18 main: add "-sharedstorage" flag
At the moment, it does two things:

1. Disable stat() caching so changes to the backing storage show up
   immediately.
2. Disable hard link tracking, as the inode numbers on the backing
   storage are not stable when files are deleted and re-created behind
   our back. This would otherwise produce strange "file does not exist"
   and other errors.

Mitigates https://github.com/rfjakob/gocryptfs/issues/156
2017-11-12 20:06:13 +01:00
Jakob Unterwurzacher
a1a98abfbb main: disallow recursively encrypting ourselves
From https://github.com/rfjakob/gocryptfs/issues/150:

  mkdir a
  mkdir a/b
  gocryptsfs -init -reverse a/
  gocryptfs -reverse a/ a/b

  Now directory a/b/ contains encrypted view of 'a' but it
  is possible to descend into encrypted version of b (e.g.
  a/b/43873uhj538765387/) which contains double encrypted
  'a' and so on.

Reported-by: https://github.com/tigmac
2017-10-31 19:48:01 +01:00
Jakob Unterwurzacher
8c1b363f74 reverse mode: disable ClientInodes (hard link tracking)
Disable hard link tracking to avoid strange breakage on duplicate
inode numbers ( https://github.com/rfjakob/gocryptfs/issues/149 ).

Reverse mode is read-only, so we don't need a working link().
2017-10-22 14:43:24 +02:00
Jakob Unterwurzacher
4954c87979 Always set "max_read" kernel option
We use fixed-size byte slice pools (sync.Pool) and cannot
handle larger requests. So ask the kernel to not send
bigger ones.

Fixes https://github.com/rfjakob/gocryptfs/issues/145
2017-10-21 18:06:55 +02:00
Jakob Unterwurzacher
0c520845f3 main: purge masterkey from memory as soon as possible
Remove the "Masterkey" field from fusefrontend.Args because it
should not be stored longer than neccessary. Instead pass the
masterkey as a separate argument to the filesystem initializers.

Then overwrite it with zeros immediately so we don't have
to wait for garbage collection.

Note that the crypto implementation still stores at least a
masterkey-derived value, so this change makes it harder, but not
impossible, to extract the encryption keys from memory.

Suggested at https://github.com/rfjakob/gocryptfs/issues/137
2017-08-11 19:02:26 +02:00
Jakob Unterwurzacher
86253b7567 main: doMount: call FreeOSMemory() before jumping into server loop
scrypt (used during masterkey decryption) allocates a lot of memory.
Go only returns memory to the OS after 5 minutes, which looks like
a waste. Call FreeOSMemory() to return it immediately.

Looking a fresh mount:

before: VmRSS:	   73556 kB
after:  VmRSS:	    8568 kB
2017-07-29 17:17:12 +02:00
Jakob Unterwurzacher
0b6e3ce635 main: move redirectStdFds() to daemonize.go
This really is a part of daemonization.

No code changes.
2017-07-23 19:21:23 +02:00
Jakob Unterwurzacher
849ec10081 macos: print load_osxfuse hint if fuse.NewServer fails
Currently neither gocryptfs nor go-fuse automatically call load_osxfuse
if the /dev/osxfuse* device(s) do not exist. At least tell the user
what to do.

See https://github.com/rfjakob/gocryptfs/issues/124 for user pain.
2017-07-10 23:33:41 +02:00
Jeff Kriske
9f8e19b856 Specify a volname for osxfuse
If I use gocryptfs cypher plain then the resulting volume
should be named 'plain' just as it would be on Linux.
2017-07-10 23:19:11 +02:00
Jakob Unterwurzacher
9d10dcbd1c main: get rid of magic "MaxWrite: 1048576" constant
go-fuse caps MaxWrite at MAX_KERNEL_WRITE anyway, and we
actually depend on this behavoir now as the byte pools
are sized according to MAX_KERNEL_WRITE.

So let's use MAX_KERNEL_WRITE explicitely.
2017-07-01 11:32:17 +02:00
Jakob Unterwurzacher
a4563e21ec main, syscallcompat: use Dup3 instead of Dup2
Dup2 is not implemented on linux/arm64.

Fixes https://github.com/rfjakob/gocryptfs/issues/121 .

Also adds cross-compilation to CI.
2017-06-18 15:43:22 +02:00
Jakob Unterwurzacher
f91ce0b004 main: increase max write size to maximum
Previously, it was at the go-fuse default of 64KiB. Getting
bigger writes should increase throughput somewhat.

Testing on tmpfs shows an improvement from 112MiB/s to 120MiB/s.
2017-06-01 18:52:02 +02:00
Charles Duffy
cf1ded5236 Implement force_owner option to display ownership as a specific user. 2017-06-01 00:26:17 +02:00
Jakob Unterwurzacher
70c16fde4c main: replace paniclog with logger(1)
Instead of redirecting stdout and stderr to /tmp/gocryptfs_paniclog,
where it is hard to find, redirect them to a newly spawned logger(1)
instance that forwards the messages to syslog.

See https://github.com/rfjakob/gocryptfs/issues/109 for an example
where the paniclog was lost due to a reboot.

Also, instead of closing stdin, redirect it to /dev/null, like most
daemons seem to do.
2017-05-24 19:57:45 +02:00
Jakob Unterwurzacher
508fd9e1d6 main: downgrade panic log create failure from fatal error to warning
Exiting with a fatal error just pushes users to use "-nosyslog",
which is even worse than not having a paniclog.
2017-05-23 18:01:21 +02:00
Jakob Unterwurzacher
8aabc54276 exitcodes: get rid of generic "Mount" exit code
Instead, create three new specific exit codes:
* FuseNewServer = 19
* CtlSock = 20
* PanicLogCreate = 21
2017-05-14 13:51:26 +02:00