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0e53e55d
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2022-01-22T14:18:48
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hash: introduce git_hash_fmt
A simple hash-to-hexadigit formatter.
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fc42c28e
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2021-11-19T09:36:03
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util: don't include unnecessary system libraries
Remove some unnecessary includes from utility code.
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f0e693b1
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2021-09-07T17:53:49
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str: introduce `git_str` for internal, `git_buf` is external
libgit2 has two distinct requirements that were previously solved by
`git_buf`. We require:
1. A general purpose string class that provides a number of utility APIs
for manipulating data (eg, concatenating, truncating, etc).
2. A structure that we can use to return strings to callers that they
can take ownership of.
By using a single class (`git_buf`) for both of these purposes, we have
confused the API to the point that refactorings are difficult and
reasoning about correctness is also difficult.
Move the utility class `git_buf` to be called `git_str`: this represents
its general purpose, as an internal string buffer class. The name also
is an homage to Junio Hamano ("gitstr").
The public API remains `git_buf`, and has a much smaller footprint. It
is generally only used as an "out" param with strict requirements that
follow the documentation. (Exceptions exist for some legacy APIs to
avoid breaking callers unnecessarily.)
Utility functions exist to convert a user-specified `git_buf` to a
`git_str` so that we can call internal functions, then converting it
back again.
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31ecaca2
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2021-09-30T08:11:40
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hash: hash functions operate on byte arrays not git_oids
Separate the concerns of the hash functions from the git_oid functions.
The git_oid structure will need to understand either SHA1 or SHA256; the
hash functions should only deal with the appropriate one of these.
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2a713da1
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2021-09-29T21:31:17
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hash: accept the algorithm in inputs
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3fff5970
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2021-09-29T21:02:38
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hash: don't abbreviate algorithm
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40f3702c
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2021-08-25T11:36:06
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c90/c99: name the unnamed union in git_hash_ctx
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b7187ed7
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2019-02-22T14:38:31
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hash: add ability to distinguish algorithms
Create an enum that allows us to distinguish between different
hashing algorithms. This enum is embedded into each
`git_hash_ctx` and will instruct the code to which hashing
function the particular request shall be dispatched.
As we do not yet have multiple hashing algorithms, we simply
initialize the hash algorithm to always be SHA1. At a later
point, we will have to extend the `git_hash_init_ctx` function to
get as parameter which algorithm shall be used.
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8832172e
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2019-02-22T14:32:40
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hash: move SHA1 implementations to its own hashing context
Create a separate `git_hash_sha1_ctx` structure that is specific
to the SHA1 implementation and move all SHA1 functions over to
use that one instead of the generic `git_hash_ctx`. The
`git_hash_ctx` for now simply has a union containing this single
SHA1 implementation, only, without any mechanism to distinguish
between different algortihms.
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fda20622
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2019-06-14T14:22:19
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hash: move SHA1 implementations into 'sha1/' folder
As we will include additional hash algorithms in the future due
to upstream git discussing a move away from SHA1, we should
accomodate for that and prepare for the move. As a first step,
move all SHA1 implementations into a common subdirectory.
Also, create a SHA1-specific header file that lives inside the
hash folder. This header will contain the SHA1-specific header
includes, function declarations and the SHA1 context structure.
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bd48bf3f
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2019-06-14T14:21:32
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hash: introduce source files to break include circles
The hash source files have circular include dependencies right
now, which shows by our broken generic hash implementation. The
"hash.h" header declares two functions and the `git_hash_ctx`
typedef before actually including the hash backend header and can
only declare the remaining hash functions after the include due
to possibly static function declarations inside of the
implementation includes.
Let's break this cycle and help maintainability by creating a
real implementation file for each of the hash implementations.
Instead of relying on the exact include order, we now especially
avoid the use of `GIT_INLINE` for function declarations.
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bbf034ab
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2019-02-22T13:43:16
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hash: move `git_hash_prov` into Win32 backend
The structure `git_hash_prov` is only ever used by the Win32 SHA1
backend. As such, it doesn't make much sense to expose it via the
generic "hash.h" header, as it is an implementation detail of the Win32
backend only. Move the typedef of `git_hash_prov` into
"hash/sha1/win32.h" to fix this.
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be9a386c
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2019-03-22T17:04:32
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Each hash implementation should define `git_hash_global_init`
This means the forward declaration isn't necessary. The forward
declaration can cause compilation errors as it conflicts with the
`GIT_INLINE` declaration (the signatures are different).
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03dc6480
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2019-01-02T09:27:44
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hash: convert `global_init` macros to real function
The `git_hash_global_init` function is simply defined as a macro to zero
for most of the different hash implementations. This makes it impossible
to treat it like a function pointer, which is required for a later
commit where we want to improve the way global initialization works.
Fix the issue by converting all no-op macros to an inline function
returning zero.
There's a small gotcha here, though: as most hash implementations only
have a header file, but not a corresponding implementation file, we
cannot declare the function as non-static. But declaring it as `static
inline` fails, too, as there is a previous declaration as non-static. So
we have to move the function declaration after the include that brings
in the function definition, as it is allowed to have a non-static
declaration after a static definition, but not the other way round.
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6c6be3ce
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2018-03-29T22:13:59
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mbedtls: use libmbedcrypto for hashing
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abb04caa
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2018-02-01T15:55:48
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consistent header guards
use consistent names for the #include / #define header guard pattern.
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0c7f49dd
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2017-06-30T13:39:01
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Make sure to always include "common.h" first
Next to including several files, our "common.h" header also declares
various macros which are then used throughout the project. As such, we
have to make sure to always include this file first in all
implementation files. Otherwise, we might encounter problems or even
silent behavioural differences due to macros or defines not being
defined as they should be. So in fact, our header and implementation
files should make sure to always include "common.h" first.
This commit does so by establishing a common include pattern. Header
files inside of "src" will now always include "common.h" as its first
other file, separated by a newline from all the other includes to make
it stand out as special. There are two cases for the implementation
files. If they do have a matching header file, they will always include
this one first, leading to "common.h" being transitively included as
first file. If they do not have a matching header file, they instead
include "common.h" as first file themselves.
This fixes the outlined problems and will become our standard practice
for header and source files inside of the "src/" from now on.
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2dfd1294
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2017-02-24T13:34:01
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hash: include sha1collisiondetection
Include the SHA1 collision attack detection library from
https://github.com/cr-marcstevens/sha1collisiondetection
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a371a8ae
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2017-02-24T13:03:15
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hash: rename implementation selection constants
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d9c0dbb0
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2014-10-24T13:29:11
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hash: use CommonCrypto on OSX for SHA-1
OSX has its own cryptographic library, let's make use of it instead of
calling out to OpenSSL.
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a3aa5f4d
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2013-09-11T12:45:20
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Add simple global shutdown hooks
Increasingly there are a number of components that want to do some
cleanup at global shutdown time (at least if there are not going
to be memory leaks). This creates a very simple system of shutdown
hooks that will be invoked by git_threads_shutdown. Right now, the
maximum number of hooks is hardcoded, but since adding a hook is
not a public API, it should be fine and I thought it was better to
start off with really simple code.
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8005c6d4
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2013-02-26T01:03:56
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Revert "hash: remove git_hash_init from internal api"
This reverts commit efe7fad6c96a3d6197a218aeaa561ec676794499, except for
the indentation fixes.
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efe7fad6
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2013-02-26T00:05:28
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hash: remove git_hash_init from internal api
Along with that, fix indentation in tests-clar/object/raw/hash.c
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359fc2d2
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2013-01-08T17:07:25
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update copyrights
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8f09f464
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2013-01-08T16:54:44
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remove ppc sha1 asm
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a8527429
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2012-11-13T14:48:10
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unload dll / destroy hash ctxs at shutdown
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d6fb0924
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2012-11-05T12:37:15
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Win32 CryptoAPI and CNG support for SHA1
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7ebefd22
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2012-11-13T10:10:40
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move hash library func ptrs to global global
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603bee07
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2012-11-12T19:22:49
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Remove git_hash_ctx_new - callers now _ctx_init()
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5e0de328
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2012-02-13T17:10:24
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Update Copyright header
Signed-off-by: schu <schu-github@schulog.org>
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bb742ede
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2011-09-19T01:54:32
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Cleanup legal data
1. The license header is technically not valid if it doesn't have a
copyright signature.
2. The COPYING file has been updated with the different licenses used in
the project.
3. The full GPLv2 header in each file annoys me.
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44908fe7
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2010-12-06T23:03:16
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Change the library include file
Libgit2 is now officially include as
#include "<git2.h>"
or indidividual files may be included as
#include <git2/index.h>
Signed-off-by: Vicent Marti <tanoku@gmail.com>
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007e0753
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2008-12-27T18:58:25
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Add some routines for SHA1 hash computation
[sp: Changed signature for output to use git_oid, and added
a test case to verify an allocated git_hash_ctx can be
reinitialized and reused.]
Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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