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7e7cfe8a
|
2021-09-26T20:20:03
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|
buf: common_prefix takes a string array
`git_strarray` is a public-facing type. Change
`git_buf_text_common_prefix` to not use it, and just take an array of
strings instead.
|
|
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a24e656a
|
2021-09-04T10:16:41
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|
common: support custom repository extensions
Allow users to specify additional repository extensions that they want
to support. For example, callers can specify that they support
`preciousObjects` and then may open repositories that support
`extensions.preciousObjects`.
Similarly, callers may opt out of supporting extensions that the library
itself supports.
|
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|
1196de4f
|
2021-08-31T15:22:44
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|
util: introduce `git__strlcmp`
Introduce a utility function that compares a NUL terminated string to a
possibly not-NUL terminated string with length. This is similar to
`strncmp` but with an added check to ensure that the lengths match (not
just the `size` portion of the two strings).
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47c70fc5
|
2021-08-26T05:40:20
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|
Merge remote-tracking branch 'origin/main' into cgraph-write
|
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63f08e42
|
2021-08-26T05:29:34
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|
Make the defaultable fields defaultable
Also, add `git_commit_graph_writer_options_init`!
|
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c7a195a1
|
2021-08-25T14:11:03
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|
Merge pull request #6006 from boretrk/c11-warnings
GCC C11 warnings
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4bbe5e6e
|
2021-08-25T18:14:10
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|
win32: name the dummy union in GIT_REPARSE_DATA_BUFFER
Instead of buf->"typeofbuffer"ReparseBuffer the members will be
referenced with buf->ReparseBuffer."typeofbuffer"
https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/ntifs/ns-ntifs-_reparse_data_buffer?redirectedfrom=MSDN
calls the union DUMMYUNIONNAME but that looks a bit cluttered.
|
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231ca4fa
|
2021-02-23T19:33:34
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|
Proof-of-concept for a more aggressive GIT_UNUSED()
This adds a `-Wunused-result`-proof `GIT_UNUSED()`, just to demonstrate
that it works. With this, sortedcache.h is now completely
`GIT_WARN_UNUSED_RESULT`-annotated!
|
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9eb17d46
|
2021-02-16T19:38:34
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|
Introduce GIT_WARN_UNUSED_RESULT
This change adds the GIT_WARN_UNUSED_RESULT annotation, which makes the
compiler warn when a return result is not used. This avoids bugs.
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|
3f28eafe
|
2021-07-07T19:35:42
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|
stdint constants in test suite
Passes w/ gcc 11 on Fedora x64.
Protip: So you don;t have to suffer,
```
perl -pe 's/(-?(?:0x)?[A-Fa-f0-9]+)([Uu])?[Ll][Ll]/\U$2INT64_C(\E$1)/mg'
```
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d525e063
|
2021-05-10T23:04:59
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|
buf: remove internal `git_buf_text` namespace
The `git_buf_text` namespace is unnecessary and strange. Remove it,
just keep the functions prefixed with `git_buf`.
|
|
|
cb136cdd
|
2021-04-14T22:22:11
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|
utf8: introduce git_utf8_char_length
Introduce a function to determine the number of Unicode characters in a
given UTF-8 string.
|
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d9c15387
|
2021-01-05T14:29:58
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|
blob: add git_blob_filter_options_init
The `git_blob_filter_options_init` function should be included, to allow
callers in FFI environments to let us initialize an options structure
for them.
|
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|
5ab0736b
|
2020-12-19T09:30:26
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|
Add tests for `git__multiply_int64_overflow`
As it turns out, the implementation of `git__multiply_int64_overflow` is
full of edge cases and tricky arithmetic. That means that it should have
unit tests.
As a result, a bug in `git__strntol64` was found (and fixed!) in
clang+32-bit.
|
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2cfa31c4
|
2020-04-05T18:30:07
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|
path: remove unused git_path_topdir
|
|
|
6554b40e
|
2020-05-13T10:39:33
|
|
settings: localize global data
Move the settings global data teardown into its own separate function,
instead of intermingled with the global state.
|
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cad7a1ba
|
2020-06-05T08:42:38
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|
clar: include the function name
|
|
|
cbae1c21
|
2020-04-01T22:12:07
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|
assert: allow non-int returning functions to assert
Include GIT_ASSERT_WITH_RETVAL and GIT_ASSERT_ARG_WITH_RETVAL so that
functions that do not return int (or more precisely, where `-1` would
not be an error code) can assert.
This allows functions that return, eg, NULL on an error code to do that
by passing the return value (in this example, `NULL`) as a second
parameter to the GIT_ASSERT_WITH_RETVAL functions.
|
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|
a95096ba
|
2020-01-12T10:31:07
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|
assert: optionally fall-back to assert(3)
Fall back to the system assert(3) in debug builds, which may aide
in debugging.
"Safe" assertions can be enabled in debug builds by setting
GIT_ASSERT_HARD=0. Similarly, hard assertions can be enabled in
release builds by setting GIT_ASSERT_HARD to nonzero.
|
|
|
abe2efe1
|
2019-12-09T12:37:34
|
|
Introduce GIT_ASSERT macros
Provide macros to replace usages of `assert`. A true `assert` is
punishing as a library. Instead we should do our best to not crash.
GIT_ASSERT_ARG(x) will now assert that the given argument complies to
some format and sets an error message and returns `-1` if it does not.
GIT_ASSERT(x) is for internal usage, and available as an internal
consistency check. It will set an error message and return `-1` in the
event of failure.
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|
163db8f2
|
2020-02-28T18:53:22
|
|
win32: test relative symlinks
Ensure that we don't canonicalize symlink targets.
|
|
|
7d55bee6
|
2020-01-10T12:44:51
|
|
win32: fix relative symlinks pointing into dirs
On Windows platforms, we need some logic to emulate symlink(3P) defined
by POSIX. As unprivileged symlinks on Windows are a rather new feature,
our current implementation is comparatively new and still has some
rough edges in special cases.
One such case is relative symlinks. While relative symlinks to files in
the same directory work as expected, libgit2 currently fails to create
reltaive symlinks pointing into other directories. This is due to the
fact that we forgot to translate the Unix-style target path to
Windows-style. Most importantly, we are currently not converting
directory separators from "/" to "\".
Fix the issue by calling `git_win32_path_canonicalize` on the target.
Add a test that verifies our ability to create such relative links
across directories.
|
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|
6460e8ab
|
2019-06-23T18:13:29
|
|
internal: use off64_t instead of git_off_t
Prefer `off64_t` internally.
|
|
|
63307cba
|
2019-09-28T17:32:18
|
|
Merge pull request #5226 from pks-t/pks/regexp-api
regexp: implement a new regular expression API
|
|
|
f585b129
|
2019-09-12T14:29:28
|
|
posix: remove superseded POSIX regex wrappers
The old POSIX regex wrappers have been superseded by our own regexp API
that provides a higher-level abstraction. Remove the POSIX wrappers in
favor of the new one.
|
|
|
d77378eb
|
2019-09-13T08:54:26
|
|
regexp: implement new regular expression API
We currently support a set of different regular expression backends with
PCRE, PCRE2, regcomp(3P) and regcomp_l(3). The current implementation of
this is done via a simple POSIX wrapper that either directly uses
supplied functions or that is a very small wrapper.
To support PCRE and PCRE2, we use their provided <pcreposix.h> and
<pcre2posix.h> wrappers. These wrappers are implemented in such a way
that the accompanying libraries pcre-posix and pcre2-posix provide the
same symbols as the libc ones, namely regcomp(3P) et al. This works out
on some systems just fine, most importantly on glibc-based ones, where
the regular expression functions are implemented as weak aliases and
thus get overridden by linking in the pcre{,2}-posix library. On other
systems we depend on the linking order of libc and pcre library, and as
libc always comes first we will end up with the functions of the libc
implementation. As a result, we may use the structures `regex_t` and
`regmatch_t` declared by <pcre{,2}posix.h>, but use functions defined by
the libc, leading to segfaults.
The issue is not easily solvable. Somed distributions like Debian have
resolved this by patching PCRE and PCRE2 to carry custom prefixes to all
the POSIX function wrappers. But this is not supported by upstream and
thus inherently unportable between distributions. We could instead try
to modify linking order, but this starts becoming fragile and will not
work e.g. when libgit2 is loaded via dlopen(3P) or similar ways. In the
end, this means that we simply cannot use the POSIX wrappers provided by
the PCRE libraries at all.
Thus, this commit introduces a new regular expression API. The new API
is on a tad higher level than the previous POSIX abstraction layer, as
it tries to abstract away any non-portable flags like e.g. REG_EXTENDED,
which has no equivalents in all of our supported backends. As there are
no users of POSIX regular expressions that do _not_ reguest REG_EXTENDED
this is fine to be abstracted away, though. Due to the API being
higher-level than before, it should generally be a tad easier to use
than the previous one.
Note: ideally, the new API would've been called `git_regex_foobar` with
a file "regex.h" and "regex.c". Unfortunately, this is currently
impossible to implement due to naming clashes between the then-existing
"regex.h" and <regex.h> provided by the libc. As we add the source
directory of libgit2 to the header search path, an include of <regex.h>
would always find our own "regex.h". Thus, we have to take the bitter
pill of adding one more character to all the functions to disambiguate
the includes.
To improve guarantees around cross-backend compatibility, this commit
also brings along an improved regular expression test suite
core::regexp.
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174b7a32
|
2019-09-19T12:24:06
|
|
buffer: fix printing into out-of-memory buffer
Before printing into a `git_buf` structure, we always call `ENSURE_SIZE`
first. This macro will reallocate the buffer as-needed depending on
whether the current amount of allocated bytes is sufficient or not. If
`asize` is big enough, then it will just do nothing, otherwise it will
call out to `git_buf_try_grow`. But in fact, it is insufficient to only
check `asize`.
When we fail to allocate any more bytes e.g. via `git_buf_try_grow`,
then we set the buffer's pointer to `git_buf__oom`. Note that we touch
neither `asize` nor `size`. So if we just check `asize > targetsize`,
then we will happily let the caller of `ENSURE_SIZE` proceed with an
out-of-memory buffer. As a result, we will print all bytes into the
out-of-memory buffer instead, resulting in an out-of-bounds write.
Fix the issue by having `ENSURE_SIZE` verify that the buffer is not
marked as OOM. Add a test to verify that we're not writing into the OOM
buffer.
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208f1d7a
|
2019-09-19T12:46:37
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|
buffer: fix infinite loop when growing buffers
When growing buffers, we repeatedly multiply the currently allocated
number of bytes by 1.5 until it exceeds the requested number of bytes.
This has two major problems:
1. If the current number of bytes is tiny and one wishes to resize
to a comparatively huge number of bytes, then we may need to loop
thousands of times.
2. If resizing to a value close to `SIZE_MAX` (which would fail
anyway), then we probably hit an infinite loop as multiplying the
current amount of bytes will repeatedly result in integer
overflows.
When reallocating buffers, one typically chooses values close to 1.5 to
enable re-use of resulting memory holes in later reallocations. But
because of this, it really only makes sense to use a factor of 1.5
_once_, but not looping until we finally are able to fit it. Thus, we
can completely avoid the loop and just opt for the much simpler
algorithm of multiplying with 1.5 once and, if the result doesn't fit,
just use the target size. This avoids both problems of looping
extensively and hitting overflows.
This commit also adds a test that would've previously resulted in an
infinite loop.
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8cbef12d
|
2019-08-08T11:52:54
|
|
util: do not perform allocations in insertsort
Our hand-rolled fallback sorting function `git__insertsort_r` does an
in-place sort of the given array. As elements may not necessarily be
pointers, it needs a way of swapping two values of arbitrary size, which
is currently implemented by allocating a temporary buffer of the
element's size. This is problematic, though, as the emulated `qsort`
interface doesn't provide any return values and thus cannot signal an
error if allocation of that temporary buffer has failed.
Convert the function to swap via a temporary buffer allocated on the
stack. Like this, it can `memcpy` contents of both elements in small
batches without requiring a heap allocation. The buffer size has been
chosen such that in most cases, a single iteration of copying will
suffice. Most importantly, it can fully contain `git_oid` structures and
pointers.
Add a bunch of tests for the `git__qsort_r` interface to verify nothing
breaks. Furthermore, this removes the declaration of `git__insertsort_r`
and makes it static as it is not used anywhere else.
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50194dcd
|
2019-07-11T15:14:42
|
|
win32: fix symlinks to relative file targets
When creating a symlink in Windows, one needs to tell Windows whether
the symlink should be a file or directory symlink. To determine which
flag to pass, we call `GetFileAttributesW` on the target file to see
whether it is a directory and then pass the flag accordingly. The
problem though is if create a symlink with a relative target path, then
we will check that relative path while not necessarily being inside of
the working directory where the symlink is to be created. Thus, getting
its attributes will either fail or return attributes of the wrong
target.
Fix this by resolving the target path relative to the directory in which
the symlink is to be created.
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93d37a1d
|
2019-06-29T09:59:36
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|
tests: core: improve symlink test coverage
Add two more tests to verify that we're not deleting symlink targets,
but the symlinks themselves. Furthermore, convert several `cl_skip`s on
Win32 to conditional skips depending on whether the clar sandbox
supports symlinks or not. Windows is grown up now and may allow
unprivileged symlinks if the machine has been configured accordingly.
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683ea2b0
|
2019-06-29T09:10:57
|
|
tests: core: add missing asserts for several function calls
Several function calls to `p_stat` and `p_close` have no verification if
they actually succeeded. As these functions _may_ fail and as we also
want to make sure that we're not doing anything dumb, let's check them,
too.
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e54343a4
|
2019-06-29T09:17:32
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|
fileops: rename to "futils.h" to match function signatures
Our file utils functions all have a "futils" prefix, e.g.
`git_futils_touch`. One would thus naturally guess that their
definitions and implementation would live in files "futils.h" and
"futils.c", respectively, but in fact they live in "fileops.h".
Rename the files to match expectations.
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c512d58f
|
2019-06-15T22:26:23
|
|
win32: cast WinAPI to void * before casting
GetProcAddress is prototyped to return a `FARPROC`, which is meant to be
a generic function pointer. It's literally `int (FAR WINAPI * FARPROC)()`
which gcc complains if you attempt to cast to a `void (*)(GIT_SRWLOCK *)`.
Cast to a `void *` before casting to avoid warnings about the arguments.
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fef847ae
|
2019-06-15T15:47:41
|
|
Merge pull request #5110 from pks-t/pks/wildmatch
Replace fnmatch with wildmatch
|
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a9f57629
|
2019-06-13T15:03:00
|
|
wildmatch: import wildmatch from git.git
In commit 70a8fc999d (stop using fnmatch (either native or
compat), 2014-02-15), upstream git has switched over all code
from their internal fnmatch copy to its new wildmatch code. We
haven't followed suit, and thus have developed some
incompatibilities in how we match regular expressions.
Import git's wildmatch from v2.22.0 and add a test suite based on
their t3070-wildmatch.sh tests.
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2d85c7e8
|
2019-06-14T14:12:19
|
|
posix: remove `p_fallocate` abstraction
By now, we have repeatedly failed to provide a nice
cross-platform implementation of `p_fallocate`. Recent tries to
do that escalated quite fast to a set of different CMake checks,
implementations, fallbacks, etc., which started to look real
awkward to maintain. In fact, `p_fallocate` had only been
introduced in commit 4e3949b73 (tests: test that largefiles can
be read through the tree API, 2019-01-30) to support a test with
large files, but given the maintenance costs it just seems not to
be worht it.
As we have removed the sole user of `p_fallocate` in the previous
commit, let's drop it altogether.
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c0dd7122
|
2019-06-06T16:48:04
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|
apply: add an options struct initializer
|
|
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0b5ba0d7
|
2019-06-06T16:36:23
|
|
Rename opt init functions to `options_init`
In libgit2 nomenclature, when we need to verb a direct object, we name
a function `git_directobject_verb`. Thus, if we need to init an options
structure named `git_foo_options`, then the name of the function that
does that should be `git_foo_options_init`.
The previous names of `git_foo_init_options` is close - it _sounds_ as
if it's initializing the options of a `foo`, but in fact
`git_foo_options` is its own noun that should be respected.
Deprecate the old names; they'll now call directly to the new ones.
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09902985
|
2019-01-13T21:12:10
|
|
core::posix: skip some locale tests on win32
|
|
|
8877d7d3
|
2019-01-13T02:08:43
|
|
tests: regcomp: use proper character classes
The '[[:digit:]]' and '[[:alpha:]]' classes require double brackets, not
single.
|
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ca1b07a2
|
2019-01-13T02:05:58
|
|
tests: regcomp: test that regex functions succeed
The regex functions return nonzero (not necessarily negative values) on
failure.
|
|
|
aea9a712
|
2018-03-02T15:12:14
|
|
tests: regcomp: assert character groups do match normal alphabet
In order to avoid us being unable to match characters which are part of
the normal US alphabet in certain weird languages, add two tests to
catch this behavior.
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e207b2a2
|
2018-03-02T15:09:20
|
|
tests: regex: restructure setup of locales
In order to make it easier adding more locale-related tests, add a
generalized framework handling initial setup of languages as well as the
cleanup of them afterwards.
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b055a6b5
|
2019-01-13T01:24:39
|
|
tests: regex: add test with LC_COLLATE being set
While we already have a test for `p_regexec` with `LC_CTYPE` being
modified, `regexec` also alters behavior as soon as `LC_COLLATE` is
being modified. Most importantly, `LC_COLLATE` changes the way how
ranges are interpreted to just not handling them at all. Thus, ensure
that either we use `regcomp_l` to avoid this, or that we've fallen back
to our builtin regex functionality which also behaves properly.
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ad4ede91
|
2018-03-02T13:51:57
|
|
tests: fix p_regcomp test not checking return type
While the test asserts that the error value indcates a non-value, it is
actually never getting assigned to. Fix this.
|
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02683b20
|
2019-01-12T23:06:39
|
|
regexec: prefix all regexec function calls with p_
Prefix all the calls to the the regexec family of functions with `p_`.
This allows us to swap out all the regular expression functions with our
own implementation. Move the declarations to `posix_regex.h` for
simpler inclusion.
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|
aeea1c46
|
2019-04-04T15:06:44
|
|
Merge pull request #4874 from tiennou/test/4615
Test that largefiles can be read through the tree API
|
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|
0345a380
|
2019-02-22T14:39:08
|
|
p_fallocate: add a test for our implementation
|
|
|
bd66925a
|
2018-12-01T10:29:32
|
|
oidmap: remove legacy low-level interface
Remove the low-level interface that was exposing implementation details of
`git_oidmap` to callers. From now on, only the high-level functions shall be
used to retrieve or modify values of a map. Adjust remaining existing callers.
|
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|
fdfabdc4
|
2018-12-01T09:49:10
|
|
strmap: remove legacy low-level interface
Remove the low-level interface that was exposing implementation details of
`git_strmap` to callers. From now on, only the high-level functions shall be
used to retrieve or modify values of a map. Adjust remaining existing callers.
|
|
|
18cf5698
|
2018-12-01T09:37:40
|
|
maps: provide high-level iteration interface
Currently, our headers need to leak some implementation details of maps due to
their direct use of indices in the implementation of their foreach macros. This
makes it impossible to completely hide the map structures away, and also makes
it impossible to include the khash implementation header in the C files of the
respective map only.
This is now being fixed by providing a high-level iteration interface
`map_iterate`, which takes as inputs the map that shall be iterated over, an
iterator as well as the locations where keys and values shall be put into. For
simplicity's sake, the iterator is a simple `size_t` that shall initialized to
`0` on the first call. All existing foreach macros are then adjusted to make use
of this new function.
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2e0a3048
|
2019-01-23T10:48:55
|
|
oidmap: introduce high-level setter for key/value pairs
Currently, one would use either `git_oidmap_insert` to insert key/value pairs
into a map or `git_oidmap_put` to insert a key only. These function have
historically been macros, which is why their syntax is kind of weird: instead of
returning an error code directly, they instead have to be passed a pointer to
where the return value shall be stored. This does not match libgit2's common
idiom of directly returning error codes.Furthermore, `git_oidmap_put` is tightly
coupled with implementation details of the map as it exposes the index of
inserted entries.
Introduce a new function `git_oidmap_set`, which takes as parameters the map,
key and value and directly returns an error code. Convert all trivial callers of
`git_oidmap_insert` and `git_oidmap_put` to make use of it.
|
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9694ef20
|
2018-12-17T09:01:53
|
|
oidmap: introduce high-level getter for values
The current way of looking up an entry from a map is tightly coupled with the
map implementation, as one first has to look up the index of the key and then
retrieve the associated value by using the index. As a caller, you usually do
not care about any indices at all, though, so this is more complicated than
really necessary. Furthermore, it invites for errors to happen if the correct
error checking sequence is not being followed.
Introduce a new high-level function `git_oidmap_get` that takes a map and a key
and returns a pointer to the associated value if such a key exists. Otherwise,
a `NULL` pointer is returned. Adjust all callers that can trivially be
converted.
|
|
|
03555830
|
2019-01-23T10:44:33
|
|
strmap: introduce high-level setter for key/value pairs
Currently, one would use the function `git_strmap_insert` to insert key/value
pairs into a map. This function has historically been a macro, which is why its
syntax is kind of weird: instead of returning an error code directly, it instead
has to be passed a pointer to where the return value shall be stored. This does
not match libgit2's common idiom of directly returning error codes.
Introduce a new function `git_strmap_set`, which takes as parameters the map,
key and value and directly returns an error code. Convert all callers of
`git_strmap_insert` to make use of it.
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ef507bc7
|
2019-01-23T10:44:02
|
|
strmap: introduce `git_strmap_get` and use it throughout the tree
The current way of looking up an entry from a map is tightly coupled with the
map implementation, as one first has to look up the index of the key and then
retrieve the associated value by using the index. As a caller, you usually do
not care about any indices at all, though, so this is more complicated than
really necessary. Furthermore, it invites for errors to happen if the correct
error checking sequence is not being followed.
Introduce a new high-level function `git_strmap_get` that takes a map and a key
and returns a pointer to the associated value if such a key exists. Otherwise,
a `NULL` pointer is returned. Adjust all callers that can trivially be
converted.
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|
7e926ef3
|
2018-11-30T12:14:43
|
|
maps: provide a uniform entry count interface
There currently exist two different function names for getting the entry count
of maps, where offmaps offset and string maps use `num_entries` and OID maps use
`size`. In most programming languages with built-in map types, this is simply
called `size`, which is also shorter to type. Thus, this commit renames the
other two functions `num_entries` to match the common way and adjusts all
callers.
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351eeff3
|
2019-01-23T10:42:46
|
|
maps: use uniform lifecycle management functions
Currently, the lifecycle functions for maps (allocation, deallocation, resize)
are not named in a uniform way and do not have a uniform function signature.
Rename the functions to fix that, and stick to libgit2's naming scheme of saying
`git_foo_new`. This results in the following new interface for allocation:
- `int git_<t>map_new(git_<t>map **out)` to allocate a new map, returning an
error code if we ran out of memory
- `void git_<t>map_free(git_<t>map *map)` to free a map
- `void git_<t>map_clear(git<t>map *map)` to remove all entries from a map
This commit also fixes all existing callers.
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3fba5891
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2019-01-20T23:53:33
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test: cast to a char the zstream test
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9c5e05ad
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2019-01-23T10:43:29
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deprecation: move deprecated tests into their own file
Move the deprecated stream tests into their own compilation unit. This
will allow us to disable any preprocessor directives that apply to
deprecation just for these tests (eg, disabling `GIT_DEPRECATED_HARD`).
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f673e232
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2018-12-27T13:47:34
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git_error: use new names in internal APIs and usage
Move to the `git_error` name in the internal API for error-related
functions.
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b5e8272f
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2019-01-06T08:29:56
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Attempt at fixing the MingW64 compilation
It seems like MingW64's size_t is defined differently than in Linux.
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487233fa
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2018-11-29T07:21:41
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Merge pull request #4895 from pks-t/pks/unused-warnings
Unused function warnings
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02bb39f4
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2018-11-22T08:49:09
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stream registration: take an enum type
Accept an enum (`git_stream_t`) during custom stream registration that
indicates whether the registration structure should be used for standard
(non-TLS) streams or TLS streams.
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df2cc108
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2018-11-18T10:29:07
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stream: provide generic registration API
Update the new stream registration API to be `git_stream_register`
which takes a registration structure and a TLS boolean. This allows
callers to register non-TLS streams as well as TLS streams.
Provide `git_stream_register_tls` that takes just the init callback for
backward compatibliity.
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43b592ac
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2018-10-25T08:49:01
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tls: introduce a wrap function
Introduce `git_tls_stream_wrap` which will take an existing `stream`
with an already connected socket and begin speaking TLS on top of it.
This is useful if you've built a connection to a proxy server and you
wish to begin CONNECT over it to tunnel a TLS connection.
Also update the pluggable TLS stream layer so that it can accept a
registration structure that provides an `init` and `wrap` function,
instead of a single initialization function.
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852bc9f4
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2018-11-23T19:26:24
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khash: remove intricate knowledge of khash types
Instead of using the `khiter_t`, `git_strmap_iter` and `khint_t` types,
simply use `size_t` instead. This decouples code from the khash stuff
and makes it possible to move the khash includes into the implementation
files.
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4209a512
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2018-11-14T12:04:42
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strntol: fix out-of-bounds reads when parsing numbers with leading sign
When parsing a number, we accept a leading plus or minus sign to return
a positive or negative number. When the parsed string has such a leading
sign, we set up a flag indicating that the number is negative and
advance the pointer to the next character in that string. This misses
updating the number of bytes in the string, though, which is why the
parser may later on do an out-of-bounds read.
Fix the issue by correctly updating both the pointer and the number of
remaining bytes. Furthermore, we need to check whether we actually have
any bytes left after having advanced the pointer, as otherwise the
auto-detection of the base may do an out-of-bonuds access. Add a test
that detects the out-of-bound read.
Note that this is not actually security critical. While there are a lot
of places where the function is called, all of these places are guarded
or irrelevant:
- commit list: this operates on objects from the ODB, which are always
NUL terminated any may thus not trigger the off-by-one OOB read.
- config: the configuration is NUL terminated.
- curl stream: user input is being parsed that is always NUL terminated
- index: the index is read via `git_futils_readbuffer`, which always NUL
terminates it.
- loose objects: used to parse the length from the object's header. As
we check previously that the buffer contains a NUL byte, this is safe.
- rebase: this parses numbers from the rebase instruction sheet. As the
rebase code uses `git_futils_readbuffer`, the buffer is always NUL
terminated.
- revparse: this parses a user provided buffer that is NUL terminated.
- signature: this parser the header information of objects. As objects
read from the ODB are always NUL terminated, this is a non-issue. The
constructor `git_signature_from_buffer` does not accept a length
parameter for the buffer, so the buffer needs to be NUL terminated, as
well.
- smart transport: the buffer that is parsed is NUL terminated
- tree cache: this parses the tree cache from the index extension. The
index itself is read via `git_futils_readbuffer`, which always NUL
terminates it.
- winhttp transport: user input is being parsed that is always NUL
terminated
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50d09407
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2018-10-29T18:05:27
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strntol: fix detection and skipping of base prefixes
The `git__strntol` family of functions has the ability to auto-detect
a number's base if the string has either the common '0x' prefix for
hexadecimal numbers or '0' prefix for octal numbers. The detection of
such prefixes and following handling has two major issues though that are
being fixed in one go now.
- We do not do any bounds checking previous to verifying the '0x' base.
While we do verify that there is at least one digit available
previously, we fail to verify that there are two digits available and
thus may do an out-of-bounds read when parsing this
two-character-prefix.
- When skipping the prefix of such numbers, we only update the pointer
length without also updating the number of remaining bytes. Thus if we
try to parse a number '0x1' of total length 3, we will first skip the
first two bytes and then try to read 3 bytes starting at '1'.
Fix both issues by disentangling the logic. Instead of doing the
detection and skipping of such prefixes in one go, we will now first try
to detect the base while also honoring how many bytes are left. Only if
we have a valid base that is either 8 or 16 and have one of the known
prefixes, we will now advance the pointer and update the remaining bytes
in one step.
Add some tests that verify that no out-of-bounds parsing happens and
that autodetection works as advertised.
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41863a00
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2018-10-29T17:19:58
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strntol: fix out-of-bounds read when skipping leading spaces
The `git__strntol` family of functions accepts leading spaces and will
simply skip them. The skipping will not honor the provided buffer's
length, though, which may lead it to read outside of the provided
buffer's bounds if it is not a simple NUL-terminated string.
Furthermore, if leading space is trimmed, the function will further
advance the pointer but not update the number of remaining bytes, which
may also lead to out-of-bounds reads.
Fix the issue by properly paying attention to the buffer length and
updating it when stripping leading whitespace characters. Add a test
that verifies that we won't read past the provided buffer length.
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623647af
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2018-10-26T12:33:59
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Merge pull request #4864 from pks-t/pks/object-parse-fixes
Object parse fixes
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83e8a6b3
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2018-10-18T16:08:46
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util: provide `git__memmem` function
Unfortunately, neither the `memmem` nor the `strnstr` functions are part
of any C standard but are merely extensions of C that are implemented by
e.g. glibc. Thus, there is no standardized way to search for a string in
a block of memory with a limited size, and using `strstr` is to be
considered unsafe in case where the buffer has not been sanitized. In
fact, there are some uses of `strstr` in exactly that unsafe way in our
codebase.
Provide a new function `git__memmem` that implements the `memmem`
semantics. That is in a given haystack of `n` bytes, search for the
occurrence of a byte sequence of `m` bytes and return a pointer to the
first occurrence. The implementation chosen is the "Not So Naive"
algorithm from [1]. It was chosen as the implementation is comparably
simple while still being reasonably efficient in most cases.
Preprocessing happens in constant time and space, searching has a time
complexity of O(n*m) with a slightly sub-linear average case.
[1]: http://www-igm.univ-mlv.fr/~lecroq/string/
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ea19efc1
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2018-10-18T15:08:56
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util: fix out of bounds read in error message
When an integer that is parsed with `git__strntol32` is too big to fit
into an int32, we will generate an error message that includes the
actual string that failed to parse. This does not acknowledge the fact
that the string may either not be NUL terminated or alternative include
additional characters after the number that is to be parsed. We may thus
end up printing characters into the buffer that aren't the number or,
worse, read out of bounds.
Fix the issue by utilizing the `endptr` that was set by
`git__strntol64`. This pointer is guaranteed to be set to the first
character following the number, and we can thus use it to compute the
width of the number that shall be printed. Create a test to verify that
we correctly truncate the number.
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39087ab8
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2018-10-18T12:11:33
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tests: core::strtol: test for some more edge-cases
Some edge cases were currently completely untested, e.g. parsing numbers
greater than INT64_{MIN,MAX}, truncating buffers by length and invalid
characters. Add tests to verify that the system under test performs as
expected.
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8d7fa88a
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2018-10-18T12:04:07
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util: remove `git__strtol32`
The function `git__strtol32` can easily be misused when untrusted data
is passed to it that may not have been sanitized with trailing `NUL`
bytes. As all usages of this function have now been removed, we can
remove this function altogether to avoid future misuse of it.
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68deb2cc
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2018-10-18T11:37:10
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util: remove unsafe `git__strtol64` function
The function `git__strtol64` does not take a maximum buffer length as
parameter. This has led to some unsafe usages of this function, and as
such we may consider it as being unsafe to use. As we have now
eradicated all usages of this function, let's remove it completely to
avoid future misuse.
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838a2f29
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2018-10-07T12:00:48
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Merge pull request #4828 from csware/git_futils_rmdir_r_failing
Add some more tests for git_futils_rmdir_r and some cleanup
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ad273718
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2018-10-04T10:32:07
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tests: sanitize file hierarchy after running rmdir tests
Currently, we do not clean up after ourselves after tests in core::rmdir
have created new files in the directory hierarchy. This may leave stale
files and/or directories after having run tests, confusing subsequent
tests that expect a pristine test environment. Most importantly, it may
cause the test initialization to fail which expects being able to
re-create the testing hierarchy before each test in case where another
test hasn't cleaned up after itself.
Fix the issue by adding a cleanup function that removes the temporary
testing hierarchy after each test if it still exists.
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e886ab46
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2018-10-02T19:50:29
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tests: Add some more tests for git_futils_rmdir_r
Signed-off-by: Sven Strickroth <email@cs-ware.de>
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dbb4a586
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2018-10-05T10:27:33
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tests: fix warning for implicit conversion of integer to pointer
GCC warns by default when implicitly converting integers to pointers or
the other way round, and commit fa48d2ea7 (vector: do not malloc
0-length vectors on dup, 2018-09-26) introduced such an implicit
conversion into our vector tests. While this is totally fine in this
test, as the pointer's value is never being used in the first place, we
can trivially avoid the warning by instead just inserting a pointer for
a variable allocated on the stack into the vector.
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ba1cd495
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2018-09-28T11:10:49
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Merge pull request #4784 from tiennou/fix/warnings
Some warnings
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fa48d2ea
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2018-09-26T19:15:35
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vector: do not malloc 0-length vectors on dup
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be4717d2
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2018-09-18T12:12:06
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path: fix "comparison always true" warning
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9994cd3f
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2018-06-25T11:56:52
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treewide: remove use of C++ style comments
C++ style comment ("//") are not specified by the ISO C90 standard and
thus do not conform to it. While libgit2 aims to conform to C90, we did
not enforce it until now, which is why quite a lot of these
non-conforming comments have snuck into our codebase. Do a tree-wide
conversion of all C++ style comments to the supported C style comments
to allow us enforcing strict C90 compliance in a later commit.
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ecf4f33a
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2018-02-08T11:14:48
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Convert usage of `git_buf_free` to new `git_buf_dispose`
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e3d764a4
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2018-03-29T22:14:12
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tests: clarify comment
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86219f40
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2017-11-30T15:40:13
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util: introduce `git__prefixncmp` and consolidate implementations
Introduce `git_prefixncmp` that will search up to the first `n`
characters of a string to see if it is prefixed by another string.
This is useful for examining if a non-null terminated character
array is prefixed by a particular substring.
Consolidate the various implementations of `git__prefixcmp` around a
single core implementation and add some test cases to validate its
behavior.
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e9369856
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2017-03-21T00:25:15
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stream: Gather streams to src/streams
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08c1b8fc
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2017-08-28T21:24:13
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cmake: simplify some HTTPS tests
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89a34828
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2017-06-16T13:34:43
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diff: implement function to calculate patch ID
The upstream git project provides the ability to calculate a so-called
patch ID. Quoting from git-patch-id(1):
A "patch ID" is nothing but a sum of SHA-1 of the file diffs
associated with a patch, with whitespace and line numbers ignored."
Patch IDs can be used to identify two patches which are probably the
same thing, e.g. when a patch has been cherry-picked to another branch.
This commit implements a new function `git_diff_patchid`, which gets a
patch and derives an OID from the diff. Note the different terminology
here: a patch in libgit2 are the differences in a single file and a diff
can contain multiple patches for different files. The implementation
matches the upstream implementation and should derive the same OID for
the same diff. In fact, some code has been directly derived from the
upstream implementation.
The upstream implementation has two different modes to calculate patch
IDs, which is the stable and unstable mode. The old way of calculating
the patch IDs was unstable in a sense that a different ordering the
diffs was leading to different results. This oversight was fixed in git
1.9, but as git tries hard to never break existing workflows, the old
and unstable way is still default. The newer and stable way does not
care for ordering of the diff hunks, and in fact it is the mode that
should probably be used today. So right now, we only implement the
stable way of generating the patch ID.
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8296da5f
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2017-06-14T10:49:28
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Merge pull request #4267 from mohseenrm/master
adding GIT_FILTER_VERSION to GIT_FILTER_INIT as part of convention
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a78441bc
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2017-06-13T11:05:40
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Adding git_filter_init for initializing `git_filter` struct + unit test
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95170294
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2017-06-13T11:08:28
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tests: core: test initialization of `git_proxy_options`
Initialization of the `git_proxy_options` structure is never tested
anywhere. Include it in our usual initialization test in
"core::structinit::compare".
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8a5e7aae
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2017-05-22T12:53:44
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varint: fix computation for remaining buffer space
When encoding varints to a buffer, we want to remain sure that the
required buffer space does not exceed what is actually available. Our
current check does not do the right thing, though, in that it does not
honor that our `pos` variable counts the position down instead of up. As
such, we will require too much memory for small varints and not enough
memory for big varints.
Fix the issue by correctly calculating the required size as
`(sizeof(varint) - pos)`. Add a test which failed before.
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417319cc
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2017-04-25T10:14:37
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tests: core::features: only check for HTTPS if it is supported
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983979fa
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2017-03-22T19:52:38
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inet_pton: don't assume addr families don't exist
Address family 5 might exist on some crazy system like Haiku.
Use `INT_MAX-1` as an unsupported address family.
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31059923
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2017-03-20T12:16:18
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Merge pull request #4169 from csware/absolute-symlink
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c10ce7c2
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2017-03-20T12:11:05
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tests: filebuf: test writing to symlink with absolute paths
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d087c8f8
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2017-02-24T14:14:56
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hash: test for sha1 collision attack detection
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40170177
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2017-02-25T10:21:59
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Fix inet_pton tests triggering an assert in Haiku
Haiku will assert in a nightly build if the "dst" input to inet_pton() is NULL.
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