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git/sha1dc_git.h
Takashi Iwai 3964cbbb5c sha1dc: allow building with the external sha1dc library
Some distros provide SHA1 collision-detect code as a shared library.
It's the same code as we have in git tree (but may be with a different
init default for hash), and git can link with it as well; at least, it
may make maintenance easier, according to our security guys.

This patch allows user to build git linking with the external sha1dc
library instead of the built-in code.  User needs to define
DC_SHA1_EXTERNAL explicitly.  As default without it, the built-in
sha1dc code is used like before.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-16 14:44:25 -07:00

23 lines
618 B
C

/* Plumbing with collition-detecting SHA1 code */
#ifdef DC_SHA1_SUBMODULE
#include "sha1collisiondetection/lib/sha1.h"
#elif defined(DC_SHA1_EXTERNAL)
#include <sha1dc/sha1.h>
#else
#include "sha1dc/sha1.h"
#endif
#ifdef DC_SHA1_EXTERNAL
void git_SHA1DCInit(SHA1_CTX *);
#else
#define git_SHA1DCInit SHA1DCInit
#endif
void git_SHA1DCFinal(unsigned char [20], SHA1_CTX *);
void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *data, unsigned long len);
#define platform_SHA_CTX SHA1_CTX
#define platform_SHA1_Init git_SHA1DCInit
#define platform_SHA1_Update git_SHA1DCUpdate
#define platform_SHA1_Final git_SHA1DCFinal