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Quoting fusefrontend_reverse/node_helpers.go :
// File names are padded to 16-byte multiples, encrypted and
// base64-encoded. We can encode at most 176 bytes to stay below the 255
// bytes limit:
// * base64(176 bytes) = 235 bytes
// * base64(192 bytes) = 256 bytes (over 255!)
// But the PKCS#7 padding is at least one byte. This means we can only use
// 175 bytes for the file name.
Noticed by @bailey27 at https://github.com/rfjakob/gocryptfs/issues/499#issuecomment-955790427
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Fixes https://github.com/rfjakob/gocryptfs/issues/499
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The rewritten openssl backend does not support this flag anymore,
and it was inherently dangerour. Drop it (ignored for compatibility)
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Now that stupidgcm supports xchacha, make it available
on mount.
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Add PreferOpenSSLXchacha20poly1305,
rename PreferOpenSSL -> PreferOpenSSLAES256GCM.
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Commit f3c777d5eaa682d878c638192311e52f9c204294 added the `-devrandom` option:
commit f3c777d5eaa682d878c638192311e52f9c204294
Author: @slackner
Date: Sun Nov 19 13:30:04 2017 +0100
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.
We now require Go v1.13 and Kernel versions should have also moved on.
Make the flag a no-op.
https://github.com/rfjakob/gocryptfs/issues/596
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Mount flag only at the moment, not saved to gocryptfs.conf.
https://github.com/rfjakob/gocryptfs/issues/452
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Our git version is v2+ for some time now, but go.mod
still declared v1. Hopefully making both match makes
https://pkg.go.dev/github.com/rfjakob/gocryptfs/v2 work.
All the import paths have been fixed like this:
find . -name \*.go | xargs sed -i s%github.com/rfjakob/gocryptfs/%github.com/rfjakob/gocryptfs/v2/%
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-deterministc-names uses all-zero dirivs but does not write
them to disk anymore.
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Everything except the
if err2.Err == syscall.EOPNOTSUPP
case. Gets too confusing when collapsed into a single line.
Issues were:
$ golangci-lint run --disable-all --enable gosimple
mount.go:473:2: S1008: should use 'return strings.HasPrefix(v, "fusermount version")' instead of 'if strings.HasPrefix(v, "fusermount version") { return true }; return false' (gosimple)
if strings.HasPrefix(v, "fusermount version") {
^
cli_args.go:258:5: S1002: should omit comparison to bool constant, can be simplified to `args.forcedecode` (gosimple)
if args.forcedecode == true {
^
cli_args.go:263:6: S1002: should omit comparison to bool constant, can be simplified to `args.aessiv` (gosimple)
if args.aessiv == true {
^
cli_args.go:267:6: S1002: should omit comparison to bool constant, can be simplified to `args.reverse` (gosimple)
if args.reverse == true {
^
internal/stupidgcm/stupidgcm.go:227:6: S1002: should omit comparison to bool constant, can be simplified to `g.forceDecode` (gosimple)
if g.forceDecode == true {
^
gocryptfs-xray/xray_tests/xray_test.go:23:5: S1004: should use !bytes.Equal(out, expected) instead (gosimple)
if bytes.Compare(out, expected) != 0 {
^
gocryptfs-xray/xray_tests/xray_test.go:40:5: S1004: should use !bytes.Equal(out, expected) instead (gosimple)
if bytes.Compare(out, expected) != 0 {
^
gocryptfs-xray/paths_ctlsock.go:34:20: S1002: should omit comparison to bool constant, can be simplified to `!eof` (gosimple)
for eof := false; eof == false; line++ {
^
tests/reverse/xattr_test.go:19:2: S1008: should use 'return err2.Err != syscall.EOPNOTSUPP' instead of 'if err2.Err == syscall.EOPNOTSUPP { return false }; return true' (gosimple)
if err2.Err == syscall.EOPNOTSUPP {
^
internal/fusefrontend/node.go:459:45: S1002: should omit comparison to bool constant, can be simplified to `!nameFileAlreadyThere` (gosimple)
if nametransform.IsLongContent(cName2) && nameFileAlreadyThere == false {
^
tests/xattr/xattr_integration_test.go:221:2: S1008: should use 'return err2.Err != syscall.EOPNOTSUPP' instead of 'if err2.Err == syscall.EOPNOTSUPP { return false }; return true' (gosimple)
if err2.Err == syscall.EOPNOTSUPP {
^
tests/test_helpers/helpers.go:338:19: S1002: should omit comparison to bool constant, can be simplified to `open` (gosimple)
if err != nil && open == true {
^
tests/matrix/concurrency_test.go:121:7: S1004: should use !bytes.Equal(buf, content) instead (gosimple)
if bytes.Compare(buf, content) != 0 {
^
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Fixes https://github.com/rfjakob/gocryptfs/issues/475
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Our multipleStrings type is now built in.
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The autoformatter now always wants to move the ensurefds012
import into the import block. Accept it and fix the spelling
of "alphabetically".
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Need support for flags at any position for
https://github.com/rfjakob/gocryptfs/issues/590
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This means we can unexport the field.
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With test to verify that it actually works this
time: Run "make root_test".
Depends-on: https://github.com/rfjakob/gocryptfs/issues/536
Fixes: https://github.com/rfjakob/gocryptfs/issues/536
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This option is similar to fuse(8) kernel_cache
Verified using vmtouch.
Without -kernel_cache:
$ dd if=/dev/zero of=foo bs=1M count=10 ; vmtouch -t foo ; vmtouch foo
10+0 records in
10+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 0,0242321 s, 433 MB/s
Files: 1
Directories: 0
Touched Pages: 2560 (10M)
Elapsed: 0.011159 seconds
Files: 1
Directories: 0
Resident Pages: 0/2560 0/10M 0%
Elapsed: 0.000993 seconds
With -kernel_cache:
$ dd if=/dev/zero of=foo bs=1M count=10 ; vmtouch -t foo ; vmtouch foo
10+0 records in
10+0 records out
10485760 bytes (10 MB, 10 MiB) copied, 0,0244015 s, 430 MB/s
Files: 1
Directories: 0
Touched Pages: 2560 (10M)
Elapsed: 0.011564 seconds
Files: 1
Directories: 0
Resident Pages: 2560/2560 10M/10M 100%
Elapsed: 0.000369 seconds
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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
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We need
https://github.com/hanwen/go-fuse/commit/fd7328faf9fdf75709f7ba7df7072aaf4eeb18b3
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.
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https://github.com/client9/misspell
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Resolves https://github.com/rfjakob/gocryptfs/issues/393
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Now that I have discovered golang.org/x/sys/cpu and that Go
versions below 1.6 are uncommon, there was not much useful
code left in prefer_openssl.
Merge the remains into stupidgcm.
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https://github.com/rfjakob/gocryptfs/issues/400
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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).
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To support arguments containing spaces, -extpass can now
be passed multiple times.
https://github.com/rfjakob/gocryptfs/issues/289
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The files are apparently processed in alphabetic order, so cli_args.go is
processed before main.go. In order to run before the go-fuse imports, put
the 'ensure fds' code in a separate package. Debug messages are omitted
to avoid additional imports (that might contain other code messing up our
file descriptors).
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Allows better error handling, gets rid of the call to an
external program, and fixes https://github.com/rfjakob/gocryptfs/issues/278 .
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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
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Show enable_trezor in the version string if we were compiled
with `-tags enable_trezor`. And hide the `-trezor` flag from
the help output if we were not.
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https://github.com/rfjakob/gocryptfs/issues/235
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Will be used for --exclude.
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Using an external program for the Trezor PIN is not supported
at the moment.
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readpassword.Trezor() is not implemented yet and returns
a hardcoded dummy key.
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Don't dump the help text on the unsuspecting user, but
give a short error message:
$ gocryptfs -foobar
flag provided but not defined: -foobar
Invalid command line: gocryptfs -foobar. Try 'gocryptfs -help'.
For comparison: This is what cp does:
$ cp --foo
cp: unrecognized option '--foo'
Try 'cp --help' for more information.
And this what we used to do:
$ gocryptfs -foobar
flag provided but not defined: -foobar
gocryptfs v1.4.4-45-gfb772da; go-fuse v20170619-35-gb16719c; 2018-06-08 go1.10.2
Usage: gocryptfs -init|-passwd|-info [OPTIONS] CIPHERDIR
or gocryptfs [OPTIONS] CIPHERDIR MOUNTPOINT
Common Options (use -hh to show all):
-aessiv Use AES-SIV encryption (with -init)
-allow_other Allow other users to access the mount
-config Custom path to config file
-ctlsock Create control socket at location
-extpass Call external program to prompt for the password
-fg Stay in the foreground
-fusedebug Debug FUSE calls
-h, -help This short help text
-hh Long help text with all options
-init Initialize encrypted directory
-info Display information about encrypted directory
-masterkey Mount with explicit master key instead of password
-nonempty Allow mounting over non-empty directory
-nosyslog Do not redirect log messages to syslog
-passfile Read password from file
-passwd Change password
-plaintextnames Do not encrypt file names (with -init)
-q, -quiet Silence informational messages
-reverse Enable reverse mode
-ro Mount read-only
-speed Run crypto speed test
-version Print version information
-- Stop option parsing
You passed: "-foobar"
flag provided but not defined: -foobar
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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
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By returning an error instead of calling os.Exit,
error cases can be tested easily. Error cases
were not tested until now.
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The fsck operation is not yet implemented, this commits
just adds the flag and improves cli flag handling.
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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.
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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
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https://goreportcard.com/report/github.com/rfjakob/gocryptfs#misspell
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Uses the runtime/trace functionality.
TODO: add to man page.
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Pretty-prints the config while stripping out sensitive
(and uninteresting) data
https://github.com/rfjakob/gocryptfs/issues/111
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