Commit Graph

27 Commits

Author SHA1 Message Date
Jakob Unterwurzacher
195d9d18a9 Implement -deterministic-names: extended -zerodiriv
-deterministc-names uses all-zero dirivs but does not write
them to disk anymore.
2021-08-20 10:58:42 +02:00
Jakob Unterwurzacher
04858ddd22 nametransform: check name validity on encryption
xfstests generic/523 discovered that we allowed to set
xattrs with "/" in the name, but did not allow to read
them later.

With this change we do not allow to set them in the first
place.
2021-06-02 14:29:48 +02:00
Jakob Unterwurzacher
f3394ae286 nametransform: move permission constants to perms.go
Prep for https://github.com/rfjakob/gocryptfs/issues/539
2021-01-10 07:27:04 +01:00
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
aae45b4d77 nametransform: Create *.name files with 0400 permission.
Similar to gocryptfs.iv files they are never modified.
2019-01-09 20:42:18 +01:00
Sebastian Lackner
ab169443fd A few more spelling fixes.
Found with the 'codespell' utility.
2019-01-04 01:23:44 +01:00
Sebastian Lackner
61241b0588 nametransform: Add implicit syscall.O_RDONLY flag. 2019-01-03 18:24:05 +01:00
Jakob Unterwurzacher
d99a0480f7 nametransform: fix possible incomplete read in ReadLongNameAt
Pread() needs retry logic, so instead of implementing it ourselves,
use os.File.

Reported by @slackner at
c09bf1f228 (r31813394)
2019-01-02 00:09:17 +01:00
Jakob Unterwurzacher
2de3851abd nametransform: rename WriteLongName() -> WriteLongNameAt()
And also rename DeleteLongName() -> DeleteLongNameAt(). The
naming follow the names open the openat() etc syscalls.
2019-01-01 16:24:25 +01:00
Jakob Unterwurzacher
de3a2c1895 fusefrontend: mark a few more functions as symlink-safe / unsafe 2019-01-01 16:24:25 +01:00
Jakob Unterwurzacher
c09bf1f228 fusefrontend: make DecryptPath() symlink-safe
DecryptPath is now symlink-safe through the use of *at()
functions.
2019-01-01 16:24:09 +01:00
Sebastian Lackner
87ced5f95d nametransform: Delete incomplete longname files on error. 2019-01-01 16:09:57 +01:00
Jakob Unterwurzacher
c270b21efc fusefrontend: get rid of os.File* wrapping
Directly use int file descriptors for the dirfd
and get rid of one level of indirection.
2018-09-23 12:17:26 +02:00
Sebastian Lackner
0f44c617d0 syscallcompat: Introduce unlinkat syscall with flags argument 2017-11-29 12:41:23 +01:00
Sebastian Lackner
9f56b33e0c fusefrontend: Fix longname handling for renames with existing target
Fixes https://github.com/rfjakob/gocryptfs/issues/170

Steps to reproduce the problem:

* Create a regular forward mount point
* Create a file with a shortname and one with a long filename
* Try to run 'mv <shortname> <longname>'

This should actually work and replace the existing file, but instead it
fails with:

    mv: cannot move '<shortname>' to '<longname>': File exists

The problem is the creation of the .name file. If the target already exists
we can safely ignore the EEXIST error and just keep the existing .name file.
2017-11-25 16:19:09 +01:00
Jakob Unterwurzacher
e827763f2e nametransform: harden name decryption against invalid input
This fixes a few issues I have found reviewing the code:

1) Limit the amount of data ReadLongName() will read. Previously,
you could send gocryptfs into out-of-memory by symlinking
gocryptfs.diriv to /dev/zero.

2) Handle the empty input case in unPad16() by returning an
error. Previously, it would panic with an out-of-bounds array
read. It is unclear to me if this could actually be triggered.

3) Reject empty names after base64-decoding in DecryptName().
An empty name crashes emeCipher.Decrypt().
It is unclear to me if B64.DecodeString() can actually return
a non-error empty result, but let's guard against it anyway.
2017-05-23 21:26:38 +02:00
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
e3c5e3f1c8 fusefronted: preserve owner for device nodes and sockets
https://github.com/rfjakob/gocryptfs/issues/64
2016-11-28 23:09:47 +01:00
Valient Gough
b764917cd5 lint fixes 2016-10-04 23:18:33 +02:00
Jakob Unterwurzacher
a6a7b424f8 reverse: resolve long names in Open and GetAttr
The last patch added functionality for generating gocryptfs.longname.*
files, this patch adds support for mapping them back to the full
filenames.

Note that resolving a long name needs a full readdir. A cache
will be implemented later on to improve performance.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
d8524c7369 syscallcompat: OSX: add Unlinkat wrapper
Also, replace remaining naked syscall.Openat calls.
2016-07-03 20:17:40 +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
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
653d4a619c longnames part II: Rename, Unlink, Rmdir, Mknod, Mkdir + tests 2016-02-07 14:02:09 +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