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Check that Date of Release file is not in the future
See merge request apt-team/apt!3
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By restricting the Date field to be in the past, an attacker cannot
just create a repository from the future that would be accepted as
a valid update for a repository.
This check can be disabled by Acquire::Check-Date set to false. This
will also disable Check-Valid-Until and any future date related checking,
if any - the option means: "my computers date cannot be trusted."
Modify the tests to allow repositories to be up to 10 hours in the
future, so we can keep using hours there to simulate time changes.
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This is an optional dependency for the test, but the skipping of the
test is very noisy and checking that an unchanged aptitude isn't
downright exploding with our libapt isn't a bad idea either.
Gbp-Dch: Ignore
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The interesting takeaway here is perhaps that 'chmod +w' is effected by
the umask – obvious in hindsight of course. The usual setup helps with
hiding that applying that recursively on all directories (and files)
isn't correct. Ensuring files will not be stored with the wrong
permissions even if in strange umask contexts is trivial in comparison.
Fixing the test also highlighted that it wasn't bulletproof as apt will
automatically fix the permissions of the directories it works with, so
for this test we actually need to introduce a shortcut in the code.
Reported-By: Ubuntu autopkgtest CI
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The testpackages hardly need debhelper at all, so any version would do,
and they build without root rights by definition, but declaring it
explicitly can't hurt and in the case of debhelper it would be sad if
our testcases break one day because the old compat level is removed.
Gbp-Dch: Ignore
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This setting was lost in the transition to cmake.
The private library has no public users and hence the default visibility
of symbols changed early to hidden – something which should eventually
be done for the public libraries as well, but one step at the time.
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It is sad that we can't wrap the cdrom method tighter at the moment, but
due to its ability to mount drives into arbitrary places via an external
suid binary we can't really do a lot better at the moment.
What we can do is set the options in the configuration space through as
it is standard in the other methods instead of doing it in main() which
is assumed to be more boilerplatey than actually doing something.
Gbp-Dch: Ignore
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This fixes a test failure on autopkgtest.
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This was broken by a refactoring in 1adcf56bec7d2127d83aa423916639740fe8e586
which iterated over getCompressorExtensions() instead of the compressors and
using their extension field. getCompressorExtensions() does not contain the
empty extension for uncompressed files, though, and hence this was broken.
LP: #1746807
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apt 1.6~alpha6 introduced aux requests to revamp the implementation of
a-t-mirror. This already included the potential of running as non-root,
but the detection wasn't complete resulting in errors or could produce
spurious warnings along the way if the directory didn't exist yet.
References: ef9677831f62a1554a888ebc7b162517d7881116
Closes: 887624
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Closes: 887017
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Closes: 886429
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References: https://lists.debian.org/debian-l10n-english/2018/01/msg00002.html
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Introduce inrelease-path option for sources.list
See merge request apt-team/apt!2
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Allow specifying an alternative path to the InRelease file, so
you can have multiple versions of a repository, for example.
Enabling this option disables fallback to Release and Release.gpg,
so setting it to InRelease can be used to ensure that only that
will be tried.
We add two test cases: One for checking that it works, and another
for checking that the fallback does not happen.
Closes: #886745
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This has not been used for a while. It was added for apt-mark
in 7b4159cf2a4b7de10622c7e4e29247067358a3ab, but apt-mark has
been rewritten in C++ quite some time ago.
Closes: #887607
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If on_ac_power exits with 255 the script would fail at this point
because set -e was set, but it should continue, as 255 means the
power status could not be determined.
LP: #1742378
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The summary line sounds a bit much: what we end up doing is just adding
two more guards before using results which should always be valid™.
That these values aren't valid is likely a bug in itself somewhere, but
that is no reason for crashing.
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Closes: 886250
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The appended "partial" should not be translated, but some translations
got this wrong and now that there is also "auxfiles" we can just fix
that problem by hiding these untranslatables from the translators.
Gbp-Dch: Ignore
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reimplement mirror method
See merge request apt-team/apt!1
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The mirror method is undocumented since 0.7.24, now with the
reimplementation it is high time to get something written about it.
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Gbp-Dch: Ignore
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A mirror list we get from an non-local source like http shouldn't be
able to include e.g. file sources and even with other online sources we
need to be careful: They also shouldn't include prefixed methods like
'tor+http'. So apply magic based on how the method is called:
mirror+file will be allowed to redirect to any source while
tor+mirror+file allows all, but sends them to their tor+ variant.
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The old implementation used to construct a query string including the
release(s) the mirrorlist should be for, but that is hard to deal with
as this rules out that partial mirrors are included in the list and it
turns out that nobody ended up implementing it on the server side.
Controlling this on the client side allows partial mirrors to be
included and as a bonus prevents that we tell the mirrorlist server
(this rather generic) user information.
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Allowing a method to request work from other methods is a powerful
capability which could be misused or exploited, so to slightly limited
the surface let method opt-in into this capability on startup.
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Embedding an entire acquire stack and HTTP logic in the mirror method
made it rather heavy weight and fragile. This reimplement goes the other
way by doing only the bare minimum in the method itself and instead
redirect the actual download of files to their proper methods.
The reimplementation drops the (in the real world) unused query-string
feature as it isn't really implementable in the new architecture.
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If a method needs a file to operate like e.g. mirror needs to get a list
of mirrors before it can redirect the the actual requests to them. That
could easily be solved by moving the logic into libapt directly, but by
allowing a method to request other methods to do something we can keep
this logic contained in the method and allow e.g. also methods which
perform binary patching or similar things.
Previously they would need to implement their own acquire system inside
the existing one which in all likelyhood will not support the same
features and methods nor operate with similar security compared to what
we have already running 'above' the requesting method. That said, to
avoid methods producing conflicts with "proper" files we are downloading
a new directory is introduced to keep the auxiliary files in.
[The message magic number 351 is a tribute to the german Grundgesetz
article 35 paragraph 1 which defines that all authorities of the
state(s) help each other on request.]
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The format isn't too hard to get right, but it gets funny with multiline
fields (which we don't really have yet) and its just easier to deal with
it once and for all which can be reused for more messages later.
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Same reasoning as with the previous commit for http with the added
benefit of moving the hard to discover and untranslated example config
into a manpage which could be translated.
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We had documentation for the http transport in our "catch-all" apt.conf
manpage, but it seems benefitial to document transports in their own
manpage instead of pushing them all into one.
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Commit 47c0bdc310c8cd62374ca6e6bb456dd183bdfc07 ("report transient
errors as transient error") accidentally changed some connection
failures to become non-transient, because the result of the error
checks where being ignored and then fatal error was returned if an
error was pending - even if that error was trivial.
After the merge of pu/happy-eyeballs2a this becomes a lot clearer,
and easy to fix.
Gbp-Dch: ignore
Regression-Of: 47c0bdc310c8cd62374ca6e6bb456dd183bdfc07
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Happy Eyeballs are coming, yay!
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Try establishing connections in alternating address families in
rapid intervals of 250 ms, adding more connections to the wait
list until one succeeds (RFC 8305, happy eyeballs 2).
It is important that WaitAndCheckErrors() waits until it has
a successful connection, a time out, or all connections failed
- otherwise the timing between tries might be wrong, and the
final long wait might exit early because one connection failed
without trying the others. Timing wise, this only works correctly
on Linux, as select() counts down there. But we rely on that in
some other places too, so this is not the time to fix that.
Timeouts are only reported in the final long wait - the short
inner waits are expected to time out more often, and multiple
times, we do not want to report them.
Closes: #668948
LP: #1308200
Gbp-Dch: paragraph
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Extracting the error checking method allows us to reuse it
in different places, so we can move the waiting and checking
out of DoConnect() eventually.
Gbp-Dch: ignore
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There's no real point in storing the IP address while resolving
it - failure messages include the IP address in any case. Do this
when picking the connection for actual use instead.
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This struct holds information about a connection attempt, like
the addrinfo, the resolved address, the fd for the connection,
and so on.
Gbp-Dch: ignore
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As a first step to implementing Happy Eyeballs version 2, we
need to order the list of hosts getaddrinfo() gave us so it
alternates between preferred and other address families.
RFC: https://tools.ietf.org/html/rfc8305
Gbp-Dch: ignore
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Commit 89c4c588b275 ("fix from David Kalnischkies for the InRelease gpg
verification code (LP: #784473)") amended verification of cleartext
signatures by a check whether the file to be verified actually starts
with "-----BEGIN PGP SIGNATURE-----\n".
However cleartext signed InRelease files have been found in the wild
which use \r\n as line ending for this armor header line, presumably
generated by a Windows PGP client. Such files are incorrectly deemed
unsigned and result in the following (misleading) error:
Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
RFC 4880 specifies in 6.2 Forming ASCII Armor:
That is to say, there is always a line ending preceding the
starting five dashes, and following the ending five dashes. The
header lines, therefore, MUST start at the beginning of a line, and
MUST NOT have text other than whitespace following them on the same
line.
RFC 4880 does not seem to specify whether LF or CRLF is used as line
ending for armor headers, but CR is generally considered whitespace
(e.g. "man perlrecharclass"), hence using CRLF is legal even under
the assumption that LF must be used.
SplitClearSignedFile() is stripping whitespace (including CR) on lineend
already before matching the string, so StartsWithGPGClearTextSignature() is
adapted to use the same ignoring. As the earlier method is responsible
for what apt will end up actually parsing nowadays as signed/unsigned this
change has no implications for security.
Thanks: Lukas Wunner for detailed report & initial patch!
References: 89c4c588b275d098af33f36eeddea6fd75068342
Closes: 884922
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Various corrections, mostly quoting, which shouldn't be a problem for us
as we tend to act in "sane" environments, but just to be sure.
[commit message written by committer]
References: Debian bugreport #849636
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The signal was introduced with the introduction of the script itself,
but seems to have never got any user as all references to it I can find
are references to other code appearing in the cronjob.
It is also the wrong place nowadays as the cronjob is just one place an
update can be triggered by, so if notifications about an update being
run are desired it is better to use a hook which will be called by all
update calls (script, cron, user, …).
Removing this code solves also the problem of improving the check to
avoid running into problems with security systems like SELinux.
References: 0c1326826fd23ce859db8e923c37b7199c6da2c8
Closes: 849636
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Closes: 882850
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References: 0b5e329a8ba2461ccb7017d3adfc972f9dccd830
Gbp-Dch: Ignore
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If the cache needs to grow to make room to insert volatile files like
deb files into the cache we were remapping null-pointers making them
non-null-pointers in the process causing trouble later on.
Only the current Releasefile pointer can currently legally be a
nullpointer as volatile files have no release file they belong to, but
for safety the pointer to the current Packages file is equally guarded.
The option APT::Cache-Start can be used to workaround this problem.
Reported-By: Mattia Rizzolo on IRC
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Earlier gcc versions used to complain that you should add them althrough
there isn't a lot of point to it if you think about it, but now gcc (>= 8)
complains about the attribute being present.
warning: ‘pure’ attribute on function returning ‘void’ [-Wattributes]
Reported-By: gcc -Wattributes
Gbp-Dch: Ignore
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