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2015-08-13Use setresuid() and setresgid() where availableJulian Andres Klode
2015-08-13Deprecate SPtrArray<T> and convert everyone to unique_ptr<T[]>Julian Andres Klode
More standardization
2015-08-13Mark SPtr as deprecated, and convert users to std::unique_ptrJulian Andres Klode
Switch to std::unique_ptr, as this is safer than SPtr.
2015-08-11Annotate more methods with APT_OVERRIDEJulian Andres Klode
Gbp-Dch: ignore Reported-By: g++ -Wsuggest-override Thanks: g++ -Wsuggest-override
2015-08-11ExecFork: Use /proc/self/fd to determine which files to closeJulian Andres Klode
This significantly reduces the number of files that have to be closed and seems to be faster, despite the additional reads. On systems where /proc/self/fd is not available, we fallback to the old code that closes all file descriptors >= 3. Closes: #764204
2015-08-10change to libapt-pkg abi 5.0 with versioned symbolsDavid Kalnischkies
We changed an aweful lot of stuff, so 5.0 is properly better than 4.X as a semantic version and as we are at it lets add some trivial symbol versioning as well: We just mark all exported symbols with the same version for now. This isn't really the proper thing to do as if we add symbols in later versions (with the same abi) they will get the same symbols version, but our .symbols file will protect us from the problems arising from this as it will ensure that a package acutally depends on a version of the abi high enough to include the symbol.
2015-08-10elimate duplicated code in pkgIndexFile subclassesDavid Kalnischkies
Trade deduplication of code for a bunch of new virtuals, so it is actually visible how the different indexes behave cleaning up the interface at large in the process. Git-Dch: Ignore
2015-08-10remove the compatibility markers for 4.13 abiDavid Kalnischkies
We aren't and we will not be really compatible again with the previous stable abi, so lets drop these markers (which never made it into a released version) for good as they have outlived their intend already. Git-Dch: Ignore
2015-08-10add c++11 override marker to overridden methodsDavid Kalnischkies
C++11 adds the 'override' specifier to mark that a method is overriding a base class method and error out if not. We hide it in the APT_OVERRIDE macro to ensure that we keep compiling in pre-c++11 standards. Reported-By: clang-modernize -add-override -override-macros Git-Dch: Ignore
2015-08-10implement reverse_iterators for cachesetsDavid Kalnischkies
By further abstracting the iterator templates we can wrap the reverse iterators of the wrapped containers and share code in a way that iterator creating is now more template intensive, but shorter in code. Git-Dch: Ignore
2015-08-10implement Signed-By option for sources.listDavid Kalnischkies
Limits which key(s) can be used to sign a repository. Not immensely useful from a security perspective all by itself, but if the user has additional measures in place to confine a repository (like pinning) an attacker who gets the key for such a repository is limited to its potential and can't use the key to sign its attacks for an other (maybe less limited) repository… (yes, this is as weak as it sounds, but having the capability might come in handy for implementing other stuff later).
2015-08-10fix memory leaks reported by -fsanitizeDavid Kalnischkies
Various small leaks here and there. Nothing particularily big, but still good to fix. Found by the sanitizers while running our testcases. Reported-By: gcc -fsanitize Git-Dch: Ignore
2015-08-10some CXXFLAGS housekeepingDavid Kalnischkies
More warnings are always better. Git-Dch: Ignore
2015-08-10make all d-pointer * const pointersDavid Kalnischkies
Doing this disables the implicit copy assignment operator (among others) which would cause hovac if used on the classes as it would just copy the pointer, not the data the d-pointer points to. For most of the classes we don't need a copy assignment operator anyway and in many classes it was broken before as many contain a pointer of some sort. Only for our Cacheset Container interfaces we define an explicit copy assignment operator which could later be implemented to copy the data from one d-pointer to the other if we need it. Git-Dch: Ignore
2015-08-10apply various style suggestions by cppcheckDavid Kalnischkies
Some of them modify the ABI, but given that we prepare a big one already, these few hardly count for much. Git-Dch: Ignore
2015-06-11show URI.Path in all acquire item descriptionsDavid Kalnischkies
It is a rather strange sight that index items use SiteOnly which strips the Path, while e.g. deb files are downloaded with NoUserPassword which does not. Important to note here is that for the file transport Path is pretty important as there is no Host which would be displayed by Site, which always resulted in "interesting" unspecific errors for "file:". Adding a 'middle' ground between the two which does show the Path but potentially modifies it (it strips a pending / at the end if existing) solves this "file:" issue, syncs the output and in the end helps to identify which file is meant exactly in progress output and co as a single site can have multiple repositories in different paths.
2015-06-09configureable acquire targets to download additional filesDavid Kalnischkies
First pass at making the acquire system capable of downloading files based on configuration rather than hardcoded entries. It is now possible to instruct 'deb' and 'deb-src' sources.list lines to download more than just Packages/Translation-* and Sources files. Details on how to do that can be found in the included documentation file.
2015-06-09support hashes for compressed pdiff filesDavid Kalnischkies
At the moment we only have hashes for the uncompressed pdiff files, but via the new '$HASH-Download' field in the .diff/Index hashes can be provided for the .gz compressed pdiff file, which apt will pick up now and use to verify the download. Now, we "just" need a buy in from the creators of repositories…
2015-06-09rework hashsum verification in the acquire systemDavid Kalnischkies
Having every item having its own code to verify the file(s) it handles is an errorprune process and easy to break, especially if items move through various stages (download, uncompress, patching, …). With a giant rework we centralize (most of) the verification to have a better enforcement rate and (hopefully) less chance for bugs, but it breaks the ABI bigtime in exchange – and as we break it anyway, it is broken even harder. It shouldn't effect most frontends as they don't deal with the acquire system at all or implement their own items, but some do and will need to be patched (might be an opportunity to use apt on-board material). The theory is simple: Items implement methods to decide if hashes need to be checked (in this stage) and to return the expected hashes for this item (in this stage). The verification itself is done in worker message passing which has the benefit that a hashsum error is now a proper error for the acquire system rather than a Done() which is later revised to a Failed().
2015-05-22Merge branch 'debian/sid' into debian/experimentalMichael Vogt
Conflicts: apt-pkg/pkgcache.h debian/changelog methods/https.cc methods/server.cc test/integration/test-apt-download-progress
2015-05-22Merge remote-tracking branch 'upstream/debian/jessie' into debian/sidMichael Vogt
Conflicts: apt-pkg/deb/dpkgpm.cc
2015-05-12implement VerifyFile as all-hashes checkDavid Kalnischkies
It isn't used much compared to what the methodname suggests, but in the remaining uses it can't hurt to check more than strictly necessary by calculating and verifying with all hashes we can compare with rather than "just" the best known hash.
2015-05-11fix macro definition for very old GCC < 3David Kalnischkies
Git-Dch: Ignore
2015-04-28Move sysconf(_SC_OPEN_MAX); out of the for() loop to avoid unneeded syscallsMichael Vogt
2015-04-19Merge branch 'debian/jessie' into debian/experimentalDavid Kalnischkies
Conflicts: apt-pkg/acquire-item.cc cmdline/apt-key.in methods/https.cc test/integration/test-apt-key test/integration/test-multiarch-foreign
2015-04-19ensure lists/ files have correct permissions after apt-cdrom addDavid Kalnischkies
Its a bit unpredictable which permissons and owners we will encounter on a CD-ROM (or a USB stick, as apt-cdrom is responsible for those too), so we have to ensure in this codepath as well that everything is nicely setup without waiting for a 'apt-get update' to fix up the (potential) mess.
2015-04-19calculate only expected hashes in methodsDavid Kalnischkies
Methods get told which hashes are expected by the acquire system, which means we can use this list to restrict what we calculate in the methods as any extra we are calculating is wasted effort as we can't compare it with anything anyway. Adding support for a new hash algorithm is therefore 'free' now and if a algorithm is no longer provided in a repository for a file, we automatically stop calculating it. In practice this results in a speed-up in Debian as we don't have SHA512 here (so far), so we practically stop calculating it.
2015-04-19if we can, use gccs __builtin_swap methodsDavid Kalnischkies
Git-Dch: Ignore
2015-04-10reimplement the last uses of sprintfDavid Kalnischkies
Working with strings c-style is complicated and error-prune, so by converting to c++ style we gain some simplicity and avoid buffer overflows by later extensions. Git-Dch: Ignore
2015-04-07demote VectorizeString gcc attribute from const to pureDavid Kalnischkies
g++-5 generates a slightly broken libapt which doesn't split architecture configurations correctly resulting in e.g. Packages files requested for the bogus architecture 'amd64,i386' instead of for amd64 and i386. The reason is an incorrectly applied attribute marking the function as const, while functions with pointer arguments are not allowed to be declared as such (note that char& is a char* in disguise). Demoting the attribute to pure fixes this issue – better would be dropping the & from char but that is an API change… Neither earlier g++ versions nor clang use this attribute to generate broken code, so we don't need a rebuild of dependencies or anything and g++-5 isn't even included in jessie, but the effect is so strange and apt popular enough to consider avoiding this problem anyhow.
2015-03-16fix some new compiler warnings reported by gcc-5David Kalnischkies
Git-Dch: Ignore
2014-11-10allow options between command and -- on commandlineDavid Kalnischkies
This used to work before we implemented a stricter commandline parser and e.g. the dd-schroot-cmd command constructs commandlines like this. Reported-By: Helmut Grohne
2014-11-10add a simple container for HashStringsDavid Kalnischkies
APT supports more than just one HashString and even allows to enforce the usage of a specific hash. This class is intended to help with storage and passing around of the HashStrings. The cherry-pick here the un-const-ification of HashType() compared to f4c3850ea335545e297504941dc8c7a8f1c83358. The point of this commit is adding infrastructure for the next one. All by itself, it just adds new symbols. Git-Dch: Ignore
2014-11-09streamline display of --help in all toolsDavid Kalnischkies
By convention, if I run a tool with --help or --version I expect it to exit successfully with the usage, while if I do call it wrong (like without any parameters) I expect the usage message shown with a non-zero exit.
2014-11-08explicit overload methods instead of adding parametersDavid Kalnischkies
Adding a new parameter (with a default) is an ABI break, but you can overload a method, which is "just" an API break for everyone doing references to this method (aka: nobody). Git-Dch: Ignore
2014-11-08guard const-ification API changesDavid Kalnischkies
Git-Dch: Ignore
2014-11-08use a abi version check similar to the gcc checkDavid Kalnischkies
Git-Dch: Ignore
2014-11-08replace ignore-deprecated #pragma dance with _PragmaDavid Kalnischkies
For compatibility we use/provide and fill quiet some deprecated methods and fields, which subsequently earns us a warning for using them. These warnings therefore have to be disabled for these codeparts and that is what this change does now in a slightly more elegant way. Git-Dch: Ignore
2014-11-08(error) va_list 'args' was opened but not closed by va_end()David Kalnischkies
The manpage of va_start and co additionally says: On some systems, va_end contains a closing '}' matching a '{' in va_start, so that both macros must occur in the same function, and in a way that allows this. So instead of return/breaking instantly, we save the return, make a proper turndown with va_end in all cases and only end after that. Reported-By: cppcheck Git-Dch: Ignore
2014-11-05Bump ABI to 4.15Michael Vogt
2014-10-26rewrite ReadMessages()David Kalnischkies
Central methods of our infrastructure like this one responsible for communication with our methods shouldn't be more complicated then they have to and not claim to have (albeit unlikely) bugs. While I am not sure about having improved the first part, the bug is now gone and a few explicit tests check that it stays that way, so nobody will notice the difference (hopefully) – expect that this should a very tiny bit faster as well as we don't manually proceed through the string. Git-Dch: Ignore
2014-10-24promote filesize to a hashstringDavid Kalnischkies
It is a very simple hashstring, which is why it isn't contributing to the usability of a list of them, but it is also trivial to check and calculate, so it doesn't hurt checking it either as it can combined even with the simplest other hashes greatly complicate attacks on them as you suddenly need a same-size hash collision, which is usually a lot harder to achieve.
2014-10-20test if TMPDIR is accessible before usingDavid Kalnischkies
Private temporary directories as created by e.g. libpam-tmpdir are nice, but they are also very effective in preventing our priviledge dropping to work as TMPDIR will be set to a directory only root has access to, so working with it as _apt will fail. We circumvent this by extending our check for a usable TMPDIR setting by checking access rights. Closes: 765951
2014-10-15set PR_SET_NO_NEW_PRIVS even if sandbox is disabledDavid Kalnischkies
Similar to 8f45798d532223adc378a4ad9ecfc64b3be26e4f, there is no harm to set this, even if we don't drop privileges. Git-Dch: Ignore
2014-10-13Fix backward compatiblity of the new pkgAcquireMethod::DropPrivsOrDie()Michael Vogt
Do not drop privileges in the methods when using a older version of libapt that does not support the chown magic in partial/ yet. To do this DropPrivileges() now will ignore a empty Apt::Sandbox::User. Cleanup all hardcoded _apt along the way.
2014-10-08Merge remote-tracking branch 'mvo/feature/acq-trans' into debian/experimentalMichael Vogt
2014-10-07set PR_SET_NO_NEW_PRIVS also if run as non-rootDavid Kalnischkies
Changing user and co works only as root, but can do some things for methods run as normal user as well to protect them from being able to call setuid binaries like sudo to elevate their privileges. Also uses a cheap trick now to build with old unsupporting kernels.
2014-10-07fix foldmarkers in fileutl.ccDavid Kalnischkies
Git-Dch: Ignore
2014-10-07Merge remote-tracking branch 'upstream/debian/experimental' into ↵Michael Vogt
feature/acq-trans Conflicts: apt-pkg/acquire-item.cc
2014-10-07Ignore EINVAL from prctl(PR_SET_NO_NEW_PRIVS)Michael Vogt
Ignore a EINVAL error here as it means that the kernel is too old to understand this option. We should not fail hard in this case but just ignore the error. closes: 764066