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| author | Takashi Iwai <tiwai@suse.de> | 2017-08-15 12:04:17 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-08-16 21:44:25 (GMT) |
| commit | 3964cbbb5c30609ebd795a979074251cf59436c3 (patch) | |
| tree | 28229c037201ab52741cefa13fb4756d5054ae7d /Makefile | |
| parent | 36f048c5e488005da0a9dfba6b617c7c9951c7cf (diff) | |
| download | git-3964cbbb5c30609ebd795a979074251cf59436c3.zip git-3964cbbb5c30609ebd795a979074251cf59436c3.tar.gz git-3964cbbb5c30609ebd795a979074251cf59436c3.tar.bz2 | |
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>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -162,6 +162,11 @@ all:: # algorithm. This is slower, but may detect attempted collision attacks. # Takes priority over other *_SHA1 knobs. # +# Define DC_SHA1_EXTERNAL in addition to DC_SHA1 if you want to build / link +# git with the external SHA1 collision-detect library. +# Without this option, i.e. the default behavior is to build git with its +# own built-in code (or submodule). +# # Define DC_SHA1_SUBMODULE in addition to DC_SHA1 to use the # sha1collisiondetection shipped as a submodule instead of the # non-submodule copy in sha1dc/. This is an experimental option used @@ -1474,6 +1479,13 @@ else DC_SHA1 := YesPlease BASIC_CFLAGS += -DSHA1_DC LIB_OBJS += sha1dc_git.o +ifdef DC_SHA1_EXTERNAL + ifdef DC_SHA1_SUBMODULE +$(error Only set DC_SHA1_EXTERNAL or DC_SHA1_SUBMODULE, not both) + endif + BASIC_CFLAGS += -DDC_SHA1_EXTERNAL + EXTLIBS += -lsha1detectcoll +else ifdef DC_SHA1_SUBMODULE LIB_OBJS += sha1collisiondetection/lib/sha1.o LIB_OBJS += sha1collisiondetection/lib/ubc_check.o @@ -1491,6 +1503,7 @@ endif endif endif endif +endif ifdef SHA1_MAX_BLOCK_SIZE LIB_OBJS += compat/sha1-chunked.o |