Jakob Unterwurzacher
ff48dc1aab
reverse: initialize the longname cache only when reverse mode is used
...
Gets rid of the idling longnameCacheCleaner thread in "normal" mode.
2016-10-05 22:22:28 +02:00
Jakob Unterwurzacher
a4956fa6bf
A few more lint fixes
2016-10-04 23:30:05 +02:00
Valient Gough
b764917cd5
lint fixes
2016-10-04 23:18:33 +02:00
Jakob Unterwurzacher
db5782028a
tests: skip tests with -openssl=false on Go 1.4 and lower
...
Go versions 1.4 and lower lack NewGCMWithNonceSize(), which causes
a panic in the test.
2016-10-04 22:34:12 +02:00
Romain
db72a4489d
fusefrontend_reverse cast Stat_t.Dev to uint64 ( #44 )
...
The [Stat_t.Dev](https://golang.org/pkg/syscall/#Stat_t ) docs say `Dev` is a `unit64`, but on [macOS amd64](https://golang.org/src/syscall/ztypes_darwin_amd64.go ) it's an `int32`.
2016-10-04 15:03:47 +02:00
Jakob Unterwurzacher
56c0b19612
without_openssl: support compiling completely without openssl
...
Build helper script: build-without-openssl.bash
2016-10-04 09:51:14 +02:00
Jakob Unterwurzacher
a00402cc47
cryptocore: rename "gcm" variable to generic "aeadCipher"
...
As we now also support AES-SIV the old name is no longer
correct.
2016-10-04 00:17:09 +02:00
Jakob Unterwurzacher
bb52937834
cryptocore: derive 512-bit key for AES-SIV
...
AES-SIV uses 1/2 of the key for authentication, 1/2 for
encryption, so we need a 64-byte key for AES-256. Derive
it from the master key by hashing it with SHA-512.
2016-10-04 00:16:56 +02:00
Jakob Unterwurzacher
46018785b4
siv_aead: Overhead is always 16
...
Add a test for that.
Also test operations using a 64-byte key.
2016-10-03 23:58:19 +02:00
Jakob Unterwurzacher
a2510efe12
reverse: use per-purpose nonce generation
...
Also pull all the deterministic nonce code into fusefrontend_reverse
to greatly simplify the normal code path.
2016-09-29 21:56:49 +02:00
Jakob Unterwurzacher
bce96b5095
reverse: move newDirIVFile into virtualfile.go
...
After all, is's a virtual file.
2016-09-28 23:30:13 +02:00
Jakob Unterwurzacher
e9bb8b800c
reverse: switch from GCM-SIV to AES-SIV
...
GCM-SIV is not yet finalized, and the reference implemenation is
painfully slow at about 2 MB/s. Switch to AES-SIV.
2016-09-26 23:25:13 +02:00
Jakob Unterwurzacher
d9fc652df0
siv_aead: add AES-SIV AEAD wrapper
2016-09-26 23:06:40 +02:00
Jakob Unterwurzacher
0e277ba19e
stupidgcm: add GCM-SIV benchmark
...
On a CPU without AES-NI:
$ go test -bench .
Benchmark4kEncStupidGCM-2 50000 24155 ns/op 169.57 MB/s
Benchmark4kEncGoGCM-2 20000 93965 ns/op 43.59 MB/s
Benchmark4kEncGCMSIV-2 500 2576193 ns/op 1.59 MB/s
2016-09-25 20:04:55 +02:00
Jakob Unterwurzacher
28838a489d
nametransform: downgrade invalid length warning
...
This happens all the time in reverse mode when somebody stats
an encrypted symlink target.
2016-09-25 19:50:16 +02:00
Jakob Unterwurzacher
5f4b16c00f
Implement changes proposed by gosimple.
...
Also delete the unused "dirIVNameStruct", found by deadcode.
2016-09-25 19:48:21 +02:00
Jakob Unterwurzacher
166ba74a05
tests: enable all go vet checks
...
...and fix reported errors:
internal/fusefrontend_reverse/rfile.go:40: github.com/rfjakob/gocryptfs/internal/contentenc.FileHeader composite literal uses unkeyed fields
internal/fusefrontend_reverse/rfs.go:249: github.com/hanwen/go-fuse/fuse.DirEntry composite literal uses unkeyed fields
internal/fusefrontend_reverse/rfs.go:264: github.com/hanwen/go-fuse/fuse.DirEntry composite literal uses unkeyed fields
2016-09-25 19:02:12 +02:00
Jakob Unterwurzacher
c7b3150afc
nametransform: delete unused function DecryptPathDirIV
2016-09-25 18:56:23 +02:00
Jakob Unterwurzacher
abd61d968d
contentenc: rename constant "IVBitLen" to "DefaultIVBits" and clarify comment
...
128-bit IVs are NOT used everywhere.
2016-09-25 18:40:29 +02:00
Jakob Unterwurzacher
b883dd10a6
reverse: add symlink encryption and Readlink support
2016-09-25 18:01:24 +02:00
Jakob Unterwurzacher
12808138ef
contentenc: add "ExternalNonce" mode
...
This will be used for strong symlink encryption in reverse mode.
2016-09-25 17:44:19 +02:00
Jakob Unterwurzacher
32e55261ca
fusefrontend: handle Readlink directly
...
Calling into go-fuse's loopbackFileSystem does not add
any value here.
2016-09-25 17:01:39 +02:00
Jakob Unterwurzacher
2050c7f3b3
reverse: add gcmsiv flag and associated tests
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
7bbf6ad6ea
reverse: derive file ID and block IVs from file paths
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
52a6f4f71e
reverse: add longnameParentCache
...
findLongnameParent has to read the whole directory to find the
right file; add a simple cache to avoid most directory scans.
2016-09-25 16:43:17 +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
35bcc2dca2
reverse: transform long names in OpenDir
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
b34a665da4
nametransform: implement ReadDirIV without Openat
...
As ReadDirIV operates on a path anyway, opening the directory
has no clear safety advantage w.r.t. concurrent renames.
If the backing directory is a reverse-mounted gocryptfs filesystem,
each directory open is an OPENDIR, and this causes a full directory
read!
This patch improves the "ls -lR" performance of an
DIR --> gocryptfs-reverse --> gocryptfs
chain by a factor of ~10.
OPENDIR counts for ls -lR:
Before 15570
After 2745
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
01c18dbcab
nametransform: return EINVAL on invalid padding
...
With the generic fmt.Errorf we trigger a warning from go-fuse:
2016/09/21 21:42:31 can't convert error type: Invalid padding
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
d76e7aadb4
reverse: use dynamic inode numbers
...
...with stable mappings for hard-linked files.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
5f726aaa9d
contentenc: add GCM-SIV support
...
Also add ReverseDummyNonce nonce generation.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
7f87ed78f2
cryptocore: add support for GCM-SIV
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
d1762c5b95
reverse: fix GetAttr for gocryptfs.conf
...
And also don't return the encrypted version of
.gocryptfs.reverse.conf in readdir.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
3d59c7dd6a
reverse: add gocryptfs.conf passthrough
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
1932248446
reverse: get rid of debug message
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
ce22ab36e1
reverse: gocryptfs.diriv content was generated from wrong path
...
Should be derived from the directory name only.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
7faa267bd4
reverse: rename readFile to clearer readBackingFile
...
Also refactor the header generation for nicer code.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
be9dfe3a89
reverse: implement dynamic diriv
...
Introduce a unique per-directory diriv that is generated
by hashing the encrypted directory path.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
10f38e8870
reverse: generate file header for Read()
...
Also create virtual gocryptfs.diriv entries (no content yet).
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
ac1221395e
nametransform: export DirIVLen constant
...
Will be needed by reverse mode.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
e42ab3908d
reverse: print value in file offset panic
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
777eb8e62f
reverse: rename types to reverseXYZ
...
...to prevent confusion with the forward variants.
FS -> reverseFS
file -> reverseFile
Also add an incomplete read implementation.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
5931eea387
contentenc: add helpers for reverse mode
...
Add the reverse variant of DecryptBlocks etc:
* EncryptBlocks
* JointPlaintextRange
* ExplodeCipherRange
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
1d4c6288f2
main: initial support for reverse mode
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
1d62086742
conentenc: handle zero-sized files in PlainSizeToCipherSize
...
Previously caused an integer underflow.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
9237b4f53e
reverse: add skeleton
...
Compiles but does not do much else.
2016-09-25 16:43:17 +02:00
Jakob Unterwurzacher
fca1b82417
fusefrontend: relay Utimens to go-fuse
...
Commit af5441dcd9
has caused a
regression ( https://github.com/rfjakob/gocryptfs/issues/35 )
that is fixed by this commit.
The go-fuse library by now has all the syscall wrappers in
place to correctly handle Utimens, also for symlinks.
Instead of duplicating the effort here just call into go-fuse.
Closes #35
2016-09-25 16:30:29 +02:00
Jakob Unterwurzacher
af5441dcd9
fusefrontend: use NsecToTimespec() for Utimens
...
This fixes a build problem on 32-bit hosts:
internal/fusefrontend/file.go:400: cannot use a.Unix() (type int64) as
type int32 in assignment
internal/fusefrontend/file.go:406: cannot use m.Unix() (type int64) as
type int32 in assignment
It also enables full nanosecond timestamps for dates
after 1970.
2016-08-09 22:18:46 +02:00
Jakob Unterwurzacher
7395b8e990
cryptocore: comment why 96-bit IVs are still supported
2016-07-31 13:36:38 +02:00
Jakob Unterwurzacher
e8a234f658
Add godoc comments to all internal packages
2016-07-06 21:51:25 +02:00