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git/sha1dc_git.h

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sha1dc: build git plumbing code more explicitly The plumbing code between sha1dc and git is defined in sha1dc_git.[ch], but these aren't compiled / included directly but only via the indirect inclusion from sha1dc code. This is slightly confusing when you try to trace the build flow. This patch brings the following changes for simplification: - Make sha1dc_git.c stand-alone and build from Makefile - sha1dc_git.h is the common header to include further sha1.h depending on the build condition - Move comments for plumbing codes from the header to definitions This is also meant as a preliminary work for further plumbing with external sha1dc shlib. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-15 20:04:16 +08:00
/* Plumbing with collition-detecting SHA1 code */
sha1dc: update from upstream Update sha1dc from the latest version by the upstream maintainer[1]. This version includes a commit of mine which allows for replacing the local modifications done to the upstream files in git.git with macro definitions to monkeypatch it in place. It also brings in a change[2] upstream made for the breakage 2.13.0 introduced on SPARC and other platforms that forbid unaligned access[3]. This means that the code customizations done since the initial import in commit 28dc98e343 ("sha1dc: add collision-detecting sha1 implementation", 2017-03-16) can be done purely via Makefile definitions and by including the content of our own sha1dc_git.[ch] in sha1dc/sha1.c via a macro. 1. https://github.com/cr-marcstevens/sha1collisiondetection/commit/cc465543b310e5f59a1d534381690052e8509b22 2. https://github.com/cr-marcstevens/sha1collisiondetection/commit/33a694a9ee1b79c24be45f9eab5ac0e1aeeaf271 3. "Git 2.13.0 segfaults on Solaris SPARC due to DC_SHA1=YesPlease being on by default" (https://public-inbox.org/git/CACBZZX6nmKK8af0-UpjCKWV4R+hV-uk2xWXVA5U+_UQ3VXU03g@mail.gmail.com/) Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-20 19:54:28 +08:00
sha1dc_git.h: re-arrange an ifdef chain for a subsequent change A subsequent change will change the semantics of DC_SHA1_SUBMODULE in a way that would require moving these checks around, so start by moving them around without any functional changes to reduce the size of the subsequent patch. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-12-09 06:29:59 +08:00
#ifdef DC_SHA1_EXTERNAL
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>
2017-08-15 20:04:17 +08:00
#include <sha1dc/sha1.h>
sha1dc_git.h: re-arrange an ifdef chain for a subsequent change A subsequent change will change the semantics of DC_SHA1_SUBMODULE in a way that would require moving these checks around, so start by moving them around without any functional changes to reduce the size of the subsequent patch. Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-12-09 06:29:59 +08:00
#elif defined(DC_SHA1_SUBMODULE)
#include "sha1collisiondetection/lib/sha1.h"
sha1dc: build git plumbing code more explicitly The plumbing code between sha1dc and git is defined in sha1dc_git.[ch], but these aren't compiled / included directly but only via the indirect inclusion from sha1dc code. This is slightly confusing when you try to trace the build flow. This patch brings the following changes for simplification: - Make sha1dc_git.c stand-alone and build from Makefile - sha1dc_git.h is the common header to include further sha1.h depending on the build condition - Move comments for plumbing codes from the header to definitions This is also meant as a preliminary work for further plumbing with external sha1dc shlib. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-15 20:04:16 +08:00
#else
#include "sha1dc/sha1.h"
#endif
sha1dc: update from upstream Update sha1dc from the latest version by the upstream maintainer[1]. This version includes a commit of mine which allows for replacing the local modifications done to the upstream files in git.git with macro definitions to monkeypatch it in place. It also brings in a change[2] upstream made for the breakage 2.13.0 introduced on SPARC and other platforms that forbid unaligned access[3]. This means that the code customizations done since the initial import in commit 28dc98e343 ("sha1dc: add collision-detecting sha1 implementation", 2017-03-16) can be done purely via Makefile definitions and by including the content of our own sha1dc_git.[ch] in sha1dc/sha1.c via a macro. 1. https://github.com/cr-marcstevens/sha1collisiondetection/commit/cc465543b310e5f59a1d534381690052e8509b22 2. https://github.com/cr-marcstevens/sha1collisiondetection/commit/33a694a9ee1b79c24be45f9eab5ac0e1aeeaf271 3. "Git 2.13.0 segfaults on Solaris SPARC due to DC_SHA1=YesPlease being on by default" (https://public-inbox.org/git/CACBZZX6nmKK8af0-UpjCKWV4R+hV-uk2xWXVA5U+_UQ3VXU03g@mail.gmail.com/) Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-20 19:54:28 +08:00
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>
2017-08-15 20:04:17 +08:00
#ifdef DC_SHA1_EXTERNAL
void git_SHA1DCInit(SHA1_CTX *);
#else
#define git_SHA1DCInit SHA1DCInit
#endif
sha1dc: build git plumbing code more explicitly The plumbing code between sha1dc and git is defined in sha1dc_git.[ch], but these aren't compiled / included directly but only via the indirect inclusion from sha1dc code. This is slightly confusing when you try to trace the build flow. This patch brings the following changes for simplification: - Make sha1dc_git.c stand-alone and build from Makefile - sha1dc_git.h is the common header to include further sha1.h depending on the build condition - Move comments for plumbing codes from the header to definitions This is also meant as a preliminary work for further plumbing with external sha1dc shlib. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-15 20:04:16 +08:00
void git_SHA1DCFinal(unsigned char [20], SHA1_CTX *);
sha1dc: update from upstream Update sha1dc from the latest version by the upstream maintainer[1]. This version includes a commit of mine which allows for replacing the local modifications done to the upstream files in git.git with macro definitions to monkeypatch it in place. It also brings in a change[2] upstream made for the breakage 2.13.0 introduced on SPARC and other platforms that forbid unaligned access[3]. This means that the code customizations done since the initial import in commit 28dc98e343 ("sha1dc: add collision-detecting sha1 implementation", 2017-03-16) can be done purely via Makefile definitions and by including the content of our own sha1dc_git.[ch] in sha1dc/sha1.c via a macro. 1. https://github.com/cr-marcstevens/sha1collisiondetection/commit/cc465543b310e5f59a1d534381690052e8509b22 2. https://github.com/cr-marcstevens/sha1collisiondetection/commit/33a694a9ee1b79c24be45f9eab5ac0e1aeeaf271 3. "Git 2.13.0 segfaults on Solaris SPARC due to DC_SHA1=YesPlease being on by default" (https://public-inbox.org/git/CACBZZX6nmKK8af0-UpjCKWV4R+hV-uk2xWXVA5U+_UQ3VXU03g@mail.gmail.com/) Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-20 19:54:28 +08:00
void git_SHA1DCUpdate(SHA1_CTX *ctx, const void *data, unsigned long len);
#define platform_SHA_CTX SHA1_CTX
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>
2017-08-15 20:04:17 +08:00
#define platform_SHA1_Init git_SHA1DCInit
sha1dc: update from upstream Update sha1dc from the latest version by the upstream maintainer[1]. This version includes a commit of mine which allows for replacing the local modifications done to the upstream files in git.git with macro definitions to monkeypatch it in place. It also brings in a change[2] upstream made for the breakage 2.13.0 introduced on SPARC and other platforms that forbid unaligned access[3]. This means that the code customizations done since the initial import in commit 28dc98e343 ("sha1dc: add collision-detecting sha1 implementation", 2017-03-16) can be done purely via Makefile definitions and by including the content of our own sha1dc_git.[ch] in sha1dc/sha1.c via a macro. 1. https://github.com/cr-marcstevens/sha1collisiondetection/commit/cc465543b310e5f59a1d534381690052e8509b22 2. https://github.com/cr-marcstevens/sha1collisiondetection/commit/33a694a9ee1b79c24be45f9eab5ac0e1aeeaf271 3. "Git 2.13.0 segfaults on Solaris SPARC due to DC_SHA1=YesPlease being on by default" (https://public-inbox.org/git/CACBZZX6nmKK8af0-UpjCKWV4R+hV-uk2xWXVA5U+_UQ3VXU03g@mail.gmail.com/) Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-20 19:54:28 +08:00
#define platform_SHA1_Update git_SHA1DCUpdate
#define platform_SHA1_Final git_SHA1DCFinal
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