Security fix! Allowing any schemes, particularly file: and
possibly others like scp: allowed file exfiltration by anyone who had
write access to the git repository, since they could add an annexed file
using such an url, or using an url that redirected to such an url,
and wait for the victim to get it into their repository and send them a copy.
* Added annex.security.allowed-url-schemes setting, which defaults
to only allowing http and https URLs. Note especially that file:/
is no longer enabled by default.
* Removed annex.web-download-command, since its interface does not allow
supporting annex.security.allowed-url-schemes across redirects.
If you used this setting, you may want to instead use annex.web-options
to pass options to curl.
With annex.web-download-command removed, nearly all url accesses in
git-annex are made via Utility.Url via http-client or curl. http-client
only supports http and https, so no problem there.
(Disabling one and not the other is not implemented.)
Used curl --proto to limit the allowed url schemes.
Note that this will cause git annex fsck --from web to mark files using
a disallowed url scheme as not being present in the web. That seems
acceptable; fsck --from web also does that when a web server is not available.
youtube-dl already disabled file: itself (probably for similar
reasons). The scheme check was also added to youtube-dl urls for
completeness, although that check won't catch any redirects it might
follow. But youtube-dl goes off and does its own thing with other
protocols anyway, so that's fine.
Special remotes that support other domain-specific url schemes are not
affected by this change. In the bittorrent remote, aria2c can still
download magnet: links. The download of the .torrent file is
otherwise now limited by annex.security.allowed-url-schemes.
This does not address any external special remotes that might download
an url themselves. Current thinking is all external special remotes will
need to be audited for this problem, although many of them will use
http libraries that only support http and not curl's menagarie.
The related problem of accessing private localhost and LAN urls is not
addressed by this commit.
This commit was sponsored by Brett Eisenberg on Patreon.
Prevent haskell http-client from decompressing gzip files, so downloads of
such files works the same as it used to with wget and curl.
Explicitly setting accept-encoding to "identity" is probably not needed,
but that's what wget sends (curl does not send the header), and since
http-client is trying to be excessively smart, it seems we need to set
hAcceptEncoding to something to prevent it from inserting its own,
and this seems better than some hack like "".
This commit was sponsored by Ole-Morten Duesund on Patreon.
* Display error message when http download fails.
There's nothing in the http-client library to nicely format a http
exception, so in some cases it has to fall back to using show on it.
Seems better than just saying "it failed" or only showing the http
status code.
* Avoid forward retry when 0 bytes were received.
forwardRetry was comparing Nothing to Just 0, and so thought there had
been progress made when 0 bytes were received.
This commit was supported by the NSF-funded DataLad project.
Switch to Data.Map.Strict everywhere that used it.
There are still lots of lazy maps in git-annex. I think switching these
is safe. The risk is that there might be a map that is used in a way
that relies on the values not being evaluated to WHNF, and switching to
strict might result in bad performance or memory use. So, I have not
switched everything.
As long as all code imports Utility.Aeson rather than Data.Aeson,
and no Strings that may contain utf-8 characters are used for eg, object
keys via T.pack, this is guaranteed to fix the problem everywhere that
git-annex generates json.
It's kind of annoying to need to wrap ToJSON with a ToJSON', especially
since every data type that has a ToJSON instance has to be ported over.
However, that only took 50 lines of code, which is worth it to ensure full
coverage. I initially tried an alternative approach of a newtype FileEncoded,
which had to be used everywhere a String was fed into aeson, and chasing
down all the sites would have been far too hard. Did consider creating an
intentionally overlapping instance ToJSON String, and letting ghc fail
to build anything that passed in a String, but am not sure that wouldn't
pollute some library that git-annex depends on that happens to use ToJSON
String internally.
This commit was supported by the NSF-funded DataLad project.
* For url downloads, git-annex now defaults to using a http library,
rather than wget or curl. But, if annex.web-options is set, it will
use curl. To use the .netrc file, run:
git config annex.web-options --netrc
* git-annex no longer uses wget (and wget is no longer shipped with
git-annex builds).
Note that curl is always run in silent mode, since the new API for
download has a MeterUpdate and doesn't make way for curl progress
output. It might be worth writing a parser for curl's progress output
to update the meter when using it, but I didn't bother with this edge
case for now.
This commit was supported by the NSF-funded DataLad project.
Remote.S3 and Remote.Helper.Http both had similar code to sink a
http-conduit Response to a file; refactor out sinkResponseFile.
downloadC downloads an url to a file using http-conduit, and supports
resuming. Falls back to curl to handle urls that http-conduit does not
support. This is not used yet, but the goal is to replace download with
it.
git-annex.cabal: conduit-extra was not actually used for a long time,
remove the dep. conduit moves into the main dependency list, but since
http-conduit was already in there, and it depends on conduit, that's not
really adding a new build dep.
This commit was supported by the NSF-funded DataLad project.
Enable HTTP connection reuse across multiple files, when git-annex
uses http-conduit. Before, a new Manager was created each time
Utility.Url used it. Now, a single Manager gets created the first time,
so connections are reused.
Doesn't help when external programs are used for url download,
but does speed up addurl --fast, fsck --from web, etc.
Testing fsck --fast --from web with 3 files, over high-latency
satellite internet, it sped up from 19.37s to 14.96s.
This commit was supported by the NSF-funded DataLad project.
The pipe's FDs got inherited by ssh and it did something that kept them
open even once it exited. Probably involving passing them on to the ssh
mux daemon.
Set close on exec, and all is well.
Kept Annex.Ssh not using processTranscript even though it no longer
hangs when it does use it, just because processTranscript is overkill
there.
This commit was supported by the NSF-funded DataLad project.
This is much clearer to follow.
I've tested this, and it still has the problem described in
doc/bugs/occasional_hang_with_p2pstdio.mdwn
Which I think indicates that problem is not with my code, but something
else. ghc runtime? Something crazy ssh does in this situation? Unsure..
Some blake hash varieties were not yet available in that version.
Rather than tracking exact details of what cryptonite supported when,
disable blake unless using a current cryptonite.
There are a lot of different variants and sizes, I suppose we might as well
export all the common ones.
Bump dep to cryptonite to 0.16, earlier versions lacked BLAKE2 support.
Even android has 0.16 or newer.
On Debian, Blake2bp_512 is buggy, so I have omitted it for now.
http://bugs.debian.org/892855
This commit was sponsored by andrea rota.
Noticed that getting a key whose size is not known resulted in a
progress display that didn't include the percent complete.
Fixed for P2P by making the size sent with DATA be used to update the
meter's total size.
In order for rateLimitMeterUpdate to also learn the total size,
had to make it be passed the Meter, and some other reorg in
Utility.Metered was also done so that --json-progress can construct a
Meter to pass to rateLimitMeterUpdate.
When the fallback rsync is done, the progress display still doesn't
include the percent complete. Only way to fix that seems to be to let rsync
display its output again, but that would conflict with git-annex's
own progress meter, which is also being displayed.
This commit was sponsored by Henrik Riomar on Patreon.
Much like Remote.P2P, there's a pool of connections to a peer, in order
to support concurrent operations.
Deals with old git-annex-ssh on the remote that does not support p2pstdio,
by only trying once to use it, and remembering if it's not supported.
Made p2pstdio send an AUTH_SUCCESS with its uuid, which serves the dual
purposes of something to detect to see that the connection is working,
and a way to verify that it's connected to the right uuid.
(There's a redundant uuid check since the uuid field is sent
by git_annex_shell, but I anticipate that being removed later when
the legacy git-annex-shell stuff gets removed.)
Not entirely happy with Remote.Git.runSsh's behavior
when the proto action fails. Running the fallback will work ok, but what
will we do when the fallbacks later get removed? It might be better to
try to reconnect, in case the connection got closed.
This commit was sponsored by Boyd Stephen Smith Jr. on Patreon.
Fourth or fifth try at this and finally found a way to make it work.
Absurd amount of busy-work forced on me by change in cabal's behavior.
Split up Utility modules that need posix stuff out of ones used by
Setup. Various other hacks around inability for Setup to use anything
that ifdefs a use of unix.
Probably lost a full day of my life to this.
This is how build systems make their users hate them. Just saying.
This reverts commit 51228c2306.
No, still doesn't work when built with cabal. It did with stack; stack
must somehow make the unix package implicitly available.
With cabal, System.Posix.Process and System.Posix.Env are both missing.
Seems I had all the work in past commits to make this build, at least on
linux. I'm actually surprised it does, without a unix dep, Utility.Env
still builds ok somehow despite using System.Posix.Env.
This commit was sponsored by Fernando Jimenez on Patreon.
This avoids warnings from stack about the module not being listed in the
cabal file. So, the generated file is also renamed to Build/SysConfig.
Note that the setup program seems to be cached despite these changes; I
had to cabal clean to get cabal to update it so that Build/SysConfig was
written.
This commit was sponsored by Jochen Bartl on Patreon.
Now youtubeDlCheck downloads the beginning of the url's content and
checks if it's html, only when it is does it pass it off the youtube-dl
to check if it supports it.
This means more work is done for urls that youtube-dl does support,
but is probably more efficient for other urls, since it only downloads
the first chunk of content, while youtube-dl probably downloads more.
As well as the reported bug, this also fixes behavior when an url
was added with youtube-dl, but the url content has now changed from
a html page to something else. Remote.Web.checkKey used to wrongly
succeed in that situation, since youtube-dl said sure it can download
that something else.
This commit was supported by the NSF-funded DataLad project.
initremote, enableremote: Really support gpg subkeys suffixed with an
exclamation mark, which forces gpg to use a specific subkey. (Previous try
had a bug.)
This commit was sponsored by Jake Vosloo on Patreon.
Fully working, including --fast/--relaxed.
Note that, while git-annex addurl --relaxed is not going to check
youtube-dl, I kept git annex importfeed --relaxed checking it.
Thinking is that, let's not break people's importfeed cron jobs, and
importfeed does not typically have to check a large number of new items,
so it's ok if it's a little bit slower when used with youtube playlist
feeds.
importfeed's behavior is also improved (?) when a feed has links in it
to non-media files. Before, those were skipped. Now, the content of the
link is downloaded. This had to be done, because trying to use
youtube-dl is slow, and if those were skipped, it would have to check
every time importfeed was run. While this behavior change may not be
desirable for some feeds, that intersperse links to web pages with
enclosures, it will be desirable for other feeds, that have
non-enclosure directy links to media files.
Remove old quvi modules.
This commit was sponsored by Øyvind Andersen Holm.
This will be used in youtube-dl integration, to tell when a html page has
been downloaded by addurl, in which case it is worth running youtube-dl
to see if it can extract media from it.
tagsoup is an almost free dependency, because yesod depends on it.
So, this only really adds a dep when git-annex is built without the
webapp.
I'd like this to as closely as possible match how browsers decide if a
page is html or not. Unfortunately, that is fairly heuristic, in order
to support malformed html. And, we don't want to falsely detect
something as html just because it has something that looks like a html
tag embedded somewhere in it. Probably any major video hosting site is
going to be serving html documents that at least start with a <html>
tag, so requiring that or a DOCTYPE should be good enough.
This commit was sponsored by Jeff Goeke-Smith on Patreon.
They need unix on non-windows, for Utility.Env, which Build.Configure uses,
but cabal can't express that in a custom-setup stanza.
To avoid this problem, Utility.Env would need to be moved into
unix-compat..
Windows needs the setenv package in custom-setup, but I don't want to
pull it in on unix, which would probably break some builds and need more
work. Instead, split out setEnv to a separate module.
Quite likely, unix-compat will get a portable environment layer, and
then both modules can be removed from here.
This commit was sponsored by Øyvind Andersen Holm.
That version has my patches for the problems that Utility.PosixFiles
was working around, so am able to get rid of that module now.
This will later allow bringing back the custom-setup stanza in the cabal
file. It will need to depend on unix-compat 0.5 on all OS's, which I'm
not ready to do yet.
This commit was sponsored by Nick Daly on Patreon.
Windows: Fix reversion that caused the path used to link to annexed
content include the drive letter and full path, rather than being
relative. (`git annex fix` will fix up after this problem).
I've not identified the commit that brought the reversion (probably it
happened this spring when I was removing MisingH and last touched
Utility.Path). Likely commit 18b9a4b8024115db67ae309fdaf54e1553037529?
The problem is that relPathDirToFile got called two paths that had the
slashes different ways around. Since takeDrive includes the first slash,
this made two paths on the same drive seem different and it bailed.
(ifdefs around this to avoid doing extra work on non-windows)
This commit was sponsored by Jack Hill on Patreon.
Get ugly reversion out of CHANGELOG.
Also, relocated the windows stack.yaml to top, and updated windows build
instructions.
This commit was sponsored by Henrik Riomar on Patreon.
Code for terminating processes on Windows is not linking anymore;
made a warning be displayed instead. This breaks restarting the
assistant and git annex assistant --stop.
I hope to see the code added to the Win32 library, where it should fit
better and should avoid whatever problem is making the linker not like it
when included in git-annex. I opened an issue requesting its addition,
here: https://github.com/haskell/win32/issues/91
This commit was sponsored by Thomas Hochstein on Patreon.
This reverts commit 839ec7e26c.
Neither way is working.. The other way failed:
.stack-work\dist\5f9bc736\build\git-annex\git-annex-tmp\Assistant.o:fake:(.text+0x6bb3): undefined reference to `terminatepid'
Seems that winprocess.c is not getting linked in.
Building with stack, it failed:
`_TerminateProcess' referenced in section `.text' of .stack-work\dist\5f9bc736\build\git-annex\git-annex-tmp\Utility\WinProcess.o: defined in discarded section `.text' of C:/Users/jenkins/AppData/Local/Programs/stack/i386-windows/ghc-8.0.2/mingw/bin/../lib/gcc/i686-w64-mingw32/5.2.0/../../../../i686-w64-mingw32/lib/../lib/libkernel32.a(dacgs01154.o)
This is a reversion of 86e638567a,
to try the other way to implement it, which will hopefully avoid the problem.
webdav: Checking if a non-existent file is present on Box.com triggered a
bug in its webdav support that generates an infinite series of redirects.
It seems to redirect foo to foo/ to foo/index.php to
foo/index.php/index.php ... Why a webdav endpoint would behave this way
who knows.
Deal with such problems by assuming such behavior means the file is not
present.
Can't simply disable following redirects, because the webdav endpoint could
legitimately be redirected to a new endpoint. So, when this happens
10 redirects have to be followed, before it gives up and assumes this means
the file does not exist.
This commit was supported by the NSF-funded DataLad project.
This avoids needing to deal with the complexity of partially transferred
files in the export. We'd not be able to resume uploading to such a file
anyway, so just avoid them.
The implementation in Remote.Directory is not completely ideal, because
it could leave the temp file hanging around in the export directory.
This only happens if it's killed with -9, or there's a power failure;
normally viaTmp cleans up after itself, even when interrupted. I could
not see a better way to do it though, since the export directory might
be the root of a filesystem.
Also some design thoughts on resuming, which depend on storeExport being
atomic.
This commit was sponsored by Fernando Jimenez on Partreon.
Security fix: Disallow hostname starting with a dash, which would get
passed to ssh and be treated an option. This could be used by an attacker
who provides a crafted ssh url (for eg a git remote) to execute arbitrary
code via ssh -oProxyCommand.
No CVE has yet been assigned for this hole.
The same class of security hole recently affected git itself,
CVE-2017-1000117.
Method: Identified all places where ssh is run, by git grep '"ssh"'
Converted them all to use a SshHost, if they did not already, for
specifying the hostname.
SshHost was made a data type with a smart constructor, which rejects
hostnames starting with '-'.
Note that git-annex already contains extensive use of Utility.SafeCommand,
which fixes a similar class of problem where a filename starting with a
dash gets passed to a program which treats it as an option.
This commit was sponsored by Jochen Bartl on Patreon.
By forking a worker process and only deleting the test directory once it exits.
This way, if a test leaves files open, they'll get closed when the worker
exits, so avoiding failure to delete open files on Windows, and failure to
delete directories due to NFS lock files.
If a test leaves a git worker process running, the closed pipes should
cause the worker to exit too, also avoiding the problem there. The 10
second sleep ought to give plenty of time for such worker processes to
exit, although this is of course a race.
Finally, even if test directory fails to be deleted still,
it won't appear as if the last test in the test suite failed; the error
will be displayed at the very end.
This commit was supported by the NSF-funded DataLad project.
QuickCheck 2.10 found a counterexample eg "\929184" broke the property.
As far as I can tell, Git.Filename is matching how git handles encoding
of strange high unicode characters in filenames for display. Git does
not display high unicode characters, and instead displays the C-style
escaped form of each byte. This is ambiguous, but since git is not
unicode aware, it doesn't need to roundtrip parse it.
So, making Git.FileName's roundtrip test only chars < 256 seems fine.
Utility.Format.format uses encode_c, in order to mimic git, so that's
ok.
Utility.Format.gen uses decode_c, but only so that stuff like "\n"
in the format string is handled. If the format string contains C-style
octal escapes, they will be converted to ascii characters, and not
combined into unicode characters, but that should not be a problem.
If the user wants unicode characters, they can include them in the
format string, without escaping them.
Finally, decode_c is used by Utility.Gpg.secretKeys, because gpg
--with-colons hex-escapes some characters in particular ':' and '\\'.
gpg passes unicode through, so this use of decode_c is not a problem.
This commit was sponsored by Henrik Riomar on Patreon.
QuickCheck added an Arbitrary instance for CTime aka EpochTime. However,
while git-annex's instance disallowed times before the epoch, QuickCheck's
does not. So, rather than using its instance, convert from an Integer.
This commit was sponsored by Thomas Hochstein on Patreon.
Don't trust OSX FSEvents's eventFlagItemModified to be called when the last
writer of a file closes it; apparently that sometimes does not happen,
which prevented files from being quickly added.
This commit was sponsored by John Peloquin on Patreon.
orElse is great, but was not the right thing to use here because
waitTakeLock could retry for other reasons than the lock being held,
which made tryTakeLock fail when it shouldn't.
Instead, move the code to tryTakeLock and implement waitTakeLock using
tryTakeLock and retry.
(Also, in runTransfer, when checkSaneLock fails, dropLock to avoid leaking a
lock handle.)
This commit was supported by the NSF-funded DataLad project.
Removed dependency on MissingH, instead depending on the split
library.
After laying groundwork for this since 2015, it
was mostly straightforward. Added Utility.Tuple and
Utility.Split. Eyeballed System.Path.WildMatch while implementing
the same thing.
Since MissingH's progress meter display was being used, I re-implemented
my own. Bonus: Now progress is displayed for transfers of files of
unknown size.
This commit was sponsored by Shane-o on Patreon.
Cryptonite is faster and allocates less, and I want to get rid of
MissingH use.
Note that the new dependency on memory is free; it's a dependency of
cryptonite.
This commit was supported by the NSF-funded DataLad project.
Moving toward dropping MissingH dep.
I think I've addressed the problem identified earlier in
09a66f702d. On Windows,
absPathFrom "/tmp/repo/xxx" "y/bar" would be "/tmp/repo/xxx\\y/bar",
which then confuses relPathDirToFile. Fixed by converting to unix (git)
style paths.
Also, relPathDirToFile was splitting only on \\ on windows and not /
which broke the example in 09a66f702d of
relPathDirToFile (absPathFrom "/tmp/repo/xxx" "y/bar") "/tmp/repo/.git/annex/objects/xxx"
Now, on windows, that will yield "..\\..\\..\\.git/annex/objects/xxx"
which once converted to unix style paths is what we want.
The bug was that withFile closes the handle afterwards, but the content
of the file was not read due to laziness. Using readFile avoids it.
This commit was sponsored by Nick Daly on Patreon.
The COPYRIGHT had Utility/DirWatcher* listed as GPL, but they were
actually BSD licensed.
No idea why I put the GPL on Utility/GPG.hs file originally.
I wrote all of it, except for guilhem's small changes to it in
00fc21bfec, which seem too small to be
independently copyrightable. I'm relicencing it BSD.
findShellCommand needs a full path to a file in order to check it for a
shebang on Windows. It was being run with only the base name of the external
special remote program, which would only work when it was in the current
directory.
This is why users in
https://github.com/DanielDent/git-annex-remote-rclone/pull/10 and elsewhere
were complaining that the previous improvements to git-annex didn't make
git-remote-rclone work on Windows.
Also, reworked checkearlytermination, which while it worked, seemed
to rely on a race condition. And, improved its error messages.
This commit was sponsored by Shane-o on Patreon.
* Run curl with -S, so HTTP errors are displayed, even when
it's otherwise silent.
* When downloading in --json or --quiet mode, use curl in preference
to wget, since curl is able to display only errors to stderr, unlike
wget.
This does mean that downloadQuiet is only silent on stdout, not necessarily
on stderr, which affects a couple other calls of it. For example,
downloading the .git/config of a http remote may show an error message now,
perhaps with slightly suboptimal formatting due to other output.
This adds one extra line of output when a download is successful,
after the progress bar. I don't much like that, but wget does not provide a
way to show HTTP errors without it.
