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dc1cf3580e
Address the root cause of technical debt we've been carrying since sha1collisiondetection was made the default in [1]. In a preceding commit we narrowly fixed a bug where the "DC_SHA1" variable would be unset (in combination with "NO_APPLE_COMMON_CRYPTO=" on OSX), even though we had the sha1collisiondetection library enabled. But the only reason we needed to have such a user-exposed knob went away with [1], and it's been doing nothing useful since then. We don't care if you define DC_SHA1=*, we only care that you don't ask for any other SHA-1 implementation. If it turns out that you didn't, we'll use sha1collisiondetection, whether you had "DC_SHA1" set or not. As a result of this being confusing we had e.g. [2] for cmake and the recent [3] for ci/lib.sh setting "DC_SHA1" explicitly, even though this was always a NOOP. A much simpler way to do this is to stop having the Makefile and CMakeLists.txt set "DC_SHA1" to be picked up by the test-lib.sh, let's instead add a trivial "test-tool sha1-is-sha1dc". It returns zero if we're using sha1collisiondetection, non-zero otherwise. 1.e6b07da278(Makefile: make DC_SHA1 the default, 2017-03-17) 2.c4b2f41b5f(cmake: support for testing git with ctest, 2020-06-26) 3.1ad5c3df35(ci: use DC_SHA1=YesPlease on osx-clang job for CI, 2022-10-20) Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Taylor Blau <me@ttaylorr.com>
25 lines
690 B
C
25 lines
690 B
C
/* Plumbing with collition-detecting SHA1 code */
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#ifdef DC_SHA1_EXTERNAL
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#include <sha1dc/sha1.h>
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#elif defined(DC_SHA1_SUBMODULE)
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#include "sha1collisiondetection/lib/sha1.h"
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#else
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#include "sha1dc/sha1.h"
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#endif
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#ifdef DC_SHA1_EXTERNAL
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void git_SHA1DCInit(SHA1_CTX *);
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#else
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#define git_SHA1DCInit SHA1DCInit
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#endif
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void git_SHA1DCFinal(unsigned char [20], SHA1_CTX *);
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void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *data, unsigned long len);
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#define platform_SHA_IS_SHA1DC /* used by "test-tool sha1-is-sha1dc" */
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#define platform_SHA_CTX SHA1_CTX
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#define platform_SHA1_Init git_SHA1DCInit
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#define platform_SHA1_Update git_SHA1DCUpdate
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#define platform_SHA1_Final git_SHA1DCFinal
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