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2018-09-23fusefrontend: make Create() symlink-safeJakob Unterwurzacher
Use Openat() and the openBackingDir() helper so we never follow symlinks.
2018-09-23fusefrontend: Open(): fix dirfd leakJakob Unterwurzacher
Close was missing.
2018-09-23fusefrontend: add named parameters to openBackingDirJakob Unterwurzacher
Named parameters make using the function easier.
2018-09-23fusefrontend: get rid of os.File* wrappingJakob Unterwurzacher
Directly use int file descriptors for the dirfd and get rid of one level of indirection.
2018-09-23fusefrontent: make Open() symlink-safeJakob Unterwurzacher
2018-09-23tests: add symlink_race toolJakob Unterwurzacher
Help uncover symlink races.
2018-09-23tlog: always trim trailing newlinesJakob Unterwurzacher
The messages we print through tlog sometimes do, sometimes do not contain a trailing newline. The stdlib logger usually drops trailing newlines automatically, but tlog postfixes ColorReset to the caller's message, so the logger logic does not work when we print colored output. Drop the newlines on our own, and add a test. Fixes the blank lines in fsck output: ~/go/src/github.com/rfjakob/gocryptfs/tests/fsck$ ./run_fsck.bash Reading password from extpass program Decrypting master key OpenDir "": invalid entry "invalid_file_name.3": illegal base64 data at input byte 17 OpenDir "": invalid entry "invalid_file_name_2": bad message fsck: corrupt entry in dir "": "invalid_file_name.3" fsck: corrupt entry in dir "": "invalid_file_name_2" OpenDir "": invalid entry "invalid_file_name____1": bad message fsck: corrupt entry in dir "": "invalid_file_name____1" doRead 4327225: corrupt block #0: stupidgcm: message authentication failed fsck: error reading file "corrupt_file" (inum 4327225): 5=input/output error cipherSize 40 < overhead 50: corrupt file doRead 4327074: corrupt header: ParseHeader: invalid version, want=2 have=22616 cipherSize 40 < overhead 50: corrupt file fsck: error reading file "corrupt_file_2" (inum 4327074): 5=input/output error Readlink "s-P7PcQDUcVkoeMDnC3EYA": decrypting target failed: stupidgcm: message authentication failed fsck: error reading symlink "corrupt_symlink": 5=input/output error Readlink "iI0MtUdzELPeOAZYwYZFee169hpGgd3l2PXQBcc9sl4": decrypting target failed: illegal base64 data at input byte 0 fsck: error reading symlink "corrupt_symlink_2": 5=input/output error OpenDir "yrwcjj2qoC4IYvhw9sbfRg": could not read gocryptfs.diriv: wanted 16 bytes, got 17 fsck: error opening dir "diriv_too_long": 5=input/output error OpenDir "trqecbMNXdzLqzpk7fSfKw": could not read gocryptfs.diriv: wanted 16 bytes, got 3 fsck: error opening dir "diriv_too_short": 5=input/output error cipherSize 8 < header size 18: corrupt file readFileID 4327049: incomplete file, got 8 instead of 19 bytes fsck: corrupt file "incomplete_file_1" (inode 4327049) readFileID 4327038: incomplete file, got 18 instead of 19 bytes fsck: corrupt file "incomplete_file_2" (inode 4327038) cipherSize 1 < header size 18: corrupt file readFileID 4327063: incomplete file, got 1 instead of 19 bytes fsck: corrupt file "incomplete_file_3" (inode 4327063) fsck: error opening dir "missing_diriv": 2=no such file or directory ListXAttr: invalid xattr name "user.gocryptfs.0a5e7yWl0SGUGeWB0Sy2K0": bad message fsck: corrupt xattr name on file "xattr_corrupt_name": "user.gocryptfs.0a5e7yWl0SGUGeWB0Sy2K0" GetXAttr: stupidgcm: message authentication failed fsck: error reading xattr "user.foo" from "xattr_corrupt_value": 5=input/output error fsck summary: 15 corrupt files
2018-09-22syscallcompat: untangle Openat flag checkJakob Unterwurzacher
Check for O_NWFOLLOW and O_EXCL separately to make the logic clearer.
2018-09-22tests: detect and report chmod failures earlierJakob Unterwurzacher
Instead of reporting the consequence: matrix_test.go:906: modeHave 0664 != modeWant 0777 Report it if chmod itself fails, and also report the old file mode: matrix_test.go:901: chmod 000 -> 777 failed: bad file descriptor
2018-09-18main: sanitize commas from fsnameJakob Unterwurzacher
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
2018-09-08fusefrontend: use OpenDirNofollow in openBackingDirJakob Unterwurzacher
Rename openBackingPath to openBackingDir and use OpenDirNofollow to be safe against symlink races. Note that openBackingDir is not used in several important code paths like Create(). But it is used in Unlink, and the performance impact in the RM benchmark to be acceptable: Before $ ./benchmark.bash Testing gocryptfs at /tmp/benchmark.bash.bYO: gocryptfs v1.6-12-g930c37e-dirty; go-fuse v20170619-49-gb11e293; 2018-09-08 go1.10.3 WRITE: 262144000 bytes (262 MB, 250 MiB) copied, 1.07979 s, 243 MB/s READ: 262144000 bytes (262 MB, 250 MiB) copied, 0.882413 s, 297 MB/s UNTAR: 16.703 MD5: 7.606 LS: 1.349 RM: 3.237 After $ ./benchmark.bash Testing gocryptfs at /tmp/benchmark.bash.jK3: gocryptfs v1.6-13-g84d6faf-dirty; go-fuse v20170619-49-gb11e293; 2018-09-08 go1.10.3 WRITE: 262144000 bytes (262 MB, 250 MiB) copied, 1.06261 s, 247 MB/s READ: 262144000 bytes (262 MB, 250 MiB) copied, 0.947228 s, 277 MB/s UNTAR: 17.197 MD5: 7.540 LS: 1.364 RM: 3.410
2018-09-08tests: restore Go 1.7 compatibilityJakob Unterwurzacher
Go 1.7 does not have t.Name() yet.
2018-09-08syscallcompat: use O_PATH in OpenDirNofollowJakob Unterwurzacher
This fixes the "0100 directory" problem in reverse mode, and should be slightly faster.
2018-09-08syscallcompat: untangle OpenNofollow and rename to OpenDirNofollowJakob Unterwurzacher
The function used to do two things: 1) Walk the directory tree in a manner safe from symlink attacks 2) Open the final component in the mode requested by the caller This change drops (2), which was only used once, and lets the caller handle it. This simplifies the function and makes it fit for reuse in forward mode in openBackingPath(), and for using O_PATH on Linux.
2018-09-08tests: add chmod testJakob Unterwurzacher
Makes sure we don't add regressions when fixing https://github.com/rfjakob/gocryptfs/issues/259
2018-09-08tests: restore TestUtimesNanoSymlinkJakob Unterwurzacher
The function seems to have been renamed by 426b9536 by mistake. Rename it back so the test is run again.
2018-09-08main: don't read the config file twice (fix pipe bug)Jakob Unterwurzacher
Instead, first Load() the file, then DecryptMasterKey(). Fixes https://github.com/rfjakob/gocryptfs/issues/258
2018-09-08configfile: add LoadAndDecrypt wrapperJakob Unterwurzacher
Callers that do not want to decrypt the masterkey should call plain Load(). https://github.com/rfjakob/gocryptfs/issues/258
2018-09-08configfile: split off masterkey decryptionJakob Unterwurzacher
Preparation for fixing https://github.com/rfjakob/gocryptfs/issues/258
2018-09-08configfile: return specific error on empty inputJakob Unterwurzacher
Report the actual problem instead of a generic "unexpected end of JSON input". https://github.com/rfjakob/gocryptfs/issues/258
2018-08-26travis: add Go 1.11Jakob Unterwurzacher
Released two days ago
2018-08-26syscallcompat: drop Fchmodat flagsv1.6.1Jakob Unterwurzacher
These were silently ignored until now (!) but are rejected by Go 1.11 stdlib. Drop the flags so the tests work again, until we figure out a better solution. https://github.com/golang/go/issues/20130
2018-08-26travis: show fs type for /tmpJakob Unterwurzacher
2018-08-18README: update benchmark outputJakob Unterwurzacher
2018-08-18Update reverse benchmarksv1.6Jakob Unterwurzacher
2018-08-18Update README for v1.6 releaseJakob Unterwurzacher
2018-08-15README: list trezor support in changelogJakob Unterwurzacher
2018-08-15trezor: document -trezor in man pageJakob Unterwurzacher
Also fix "--", which was shown as just "-" in the man pager.
2018-08-15trezor: show support in version stringJakob Unterwurzacher
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.
2018-08-15dep: update dependenciesJakob Unterwurzacher
2018-08-15build.bash: handle args containing spacesJakob Unterwurzacher
Fixes ./build.bash -tags "enable_trezor without_openssl"
2018-08-15fusefrontend: truncateGrowFile: pass zeroPad error to callerJakob Unterwurzacher
Errors from zeroPad were ignored until now, as discovered using xfstests generic/083.
2018-08-15fsck: skip already-seen hard-linked filesJakob Unterwurzacher
We may hit files several times due to hard links. Only check the contents once.
2018-08-15fsck: don't print corse corruption offsetJakob Unterwurzacher
The exact ciphertext block number (4KiB granularity) is already printed in the doRead message. Don't cause confusion by printing the 128KiB-granularity offset as well. doRead 767: corrupt block #4: stupidgcm: message authentication failed fsck: error reading file "pa/d7/d14/f10c" (inum 767): 5=input/output error
2018-08-15main: add -e as an alias for -excludeJakob Unterwurzacher
2018-08-15fusefrontend_reverse: reject excludes for the root directory ""Jakob Unterwurzacher
This is most likely a mistake by the user. Reject it.
2018-08-11Update changelogJakob Unterwurzacher
2018-08-11reverse mode: add --exclude optionJakob Unterwurzacher
https://github.com/rfjakob/gocryptfs/issues/235
2018-08-11cli: add multipleStrings typeJakob Unterwurzacher
Will be used for --exclude.
2018-08-11tests: VerifyExistence: panic on inconsistent resultsJakob Unterwurzacher
In the past we did not check whether all methods of checking the file return the same result. We should.
2018-08-02travis ci: drop go 1.5 and go 1.6Jakob Unterwurzacher
Trying to build with these versions now throws this error: # golang.org/x/sys/unix ../../../golang.org/x/sys/unix/ioctl.go:18: undefined: runtime.KeepAlive It looks like x/sys/unix has dropped support for older Go versions.
2018-07-23fsck: print inode number on file read errorJakob Unterwurzacher
This makes it possible to find the file without mounting the fs.
2018-07-23configfile: drop superflous PrintfJakob Unterwurzacher
Before: $ gocryptfs -fsck . LoadConfFile: ReadFile: &os.PathError{Op:"open", Path:"/var/tmp/check-gocryptfs/scratchdev/gocryptfs.conf", Err:0xd} Cannot open config file: open /var/tmp/check-gocryptfs/scratchdev/gocryptfs.conf: permission denied After: $ gocryptfs -fsck . Cannot open config file: open /var/tmp/check-gocryptfs/scratchdev/gocryptfs.conf: permission denied
2018-07-22fusefronted: disallow writes running concurrently with readsJakob Unterwurzacher
As uncovered by xfstests generic/465, concurrent reads and writes could lead to this, doRead 3015532: corrupt block #1039: stupidgcm: message authentication failed, as the read could pick up a block that has not yet been completely written - write() is not atomic! Now writes take ContentLock exclusively, while reads take it shared, meaning that multiple reads can run in parallel with each other, but not with a write. This also simplifies the file header locking.
2018-07-15fusefrontend: doWrite: delete file header if first write failsJakob Unterwurzacher
xfstests generic/083 fills the filesystem almost completely while running fsstress in parallel. In fsck, these would show up: readFileID 2580: incomplete file, got 18 instead of 19 bytes This could happen when writing the file header works, but writing the actual data fails. Now we kill the header again by truncating the file to zero.
2018-07-15fusefrontend: doWrite: no need to take HeaderLock.RLock()Jakob Unterwurzacher
Other writers are blocked by ContentLock already.
2018-07-15WriteDirIV: delete incomplete gocryptfs.diriv file if write failsJakob Unterwurzacher
If the underlying filesystem is full, writing to gocryptfs.diriv may fail, and later fsck show this: OpenDir "xyz": could not read gocryptfs.diriv: wanted 16 bytes, got 0 Uncovered by xfstests generic/083. Also fixes a fd leak in the error path.
2018-07-15contentenc: reserve one extra block in pool plaintext buffersJakob Unterwurzacher
File holes and -fsck can cause unaligned read accesses, which means we have to decrypt one extra plaintext block. xfstests generic/083 manage to crash -fsck like this: generic/083 2018/07/14 15:25:21 wrong len=266240, want=131072 panic: wrong len=266240, want=131072 goroutine 1 [running]: log.Panicf(0x67fc00, 0x15, 0xc4204fec90, 0x2, 0x2) /usr/local/go/src/log/log.go:333 +0xda github.com/rfjakob/gocryptfs/internal/contentenc.(*bPool).Put(0xc4200d4800, 0xc4202f2000, 0x21000, 0x41000) /home/jakob/go/src/github.com/rfjakob/gocryptfs/internal/contentenc/bpool.go:27 +0x15d github.com/rfjakob/gocryptfs/internal/fusefrontend.(*File).doRead(0xc4200b4500, 0xc42019e000, 0x0, 0x20000, 0x28400, 0x20000, 0xc42019e000, 0xc4204ff008, 0x435164, 0xc420000180) /home/jakob/go/src/github.com/rfjakob/gocryptfs/internal/fusefrontend/file.go:227 +0xba9 github.com/rfjakob/gocryptfs/internal/fusefrontend.(*File).Read(0xc4200b4500, 0xc42019e000, 0x20000, 0x20000, 0x28400, 0x0, 0x0, 0x0) /home/jakob/go/src/github.com/rfjakob/gocryptfs/internal/fusefrontend/file.go:246 +0x23e main.(*fsckObj).file(0xc420069320, 0xc42001a630, 0x21) /home/jakob/go/src/github.com/rfjakob/gocryptfs/fsck.go:126 +0x21f main.(*fsckObj).dir(0xc420069320, 0xc420014dc0, 0x1d) /home/jakob/go/src/github.com/rfjakob/gocryptfs/fsck.go:76 +0x387 main.(*fsckObj).dir(0xc420069320, 0xc42021dae0, 0x19) /home/jakob/go/src/github.com/rfjakob/gocryptfs/fsck.go:74 +0x347
2018-07-15fsck: add debug output (enabled via -debug)Jakob Unterwurzacher
Turn the commented-out fmt.Printf into debug output via the tlog infrastructure.
2018-07-15file-format.md: list full block overheadrfjakob
For large files, the overhead will be 0.78125 %.
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