t0013: add a basic sha1 collision detection test

diff --git a/Makefile b/Makefile
index 052dce087cda9b1cfa91a4298dcb36dacf74dfaa..fc9d89498b47d9ca7ae07b2fdef7563d95a67465 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -142,6 +142,10 @@ all::
 # Define PPC_SHA1 environment variable when running make to make use of
 # a bundled SHA1 routine optimized for PowerPC.
 #
+# Define DC_SHA1 to unconditionally enable the collision-detecting sha1
+# algorithm. This is slower, but may detect attempted collision attacks.
+# Takes priority over other *_SHA1 knobs.
+#
 # Define SHA1_MAX_BLOCK_SIZE to limit the amount of data that will be hashed
 # in one call to the platform's SHA1_Update(). e.g. APPLE_COMMON_CRYPTO
 # wants 'SHA1_MAX_BLOCK_SIZE=1024L*1024L*1024L' defined.
@@ -250,6 +254,12 @@ all::
 # apostrophes to be ASCII so that cut&pasting examples to the shell
 # will work.
 #
+# Define USE_ASCIIDOCTOR to use Asciidoctor instead of AsciiDoc to build the
+# documentation.
+#
+# Define ASCIIDOCTOR_EXTENSIONS_LAB to point to the location of the Asciidoctor
+# Extensions Lab if you have it available.
+#
 # Define PERL_PATH to the path of your Perl binary (usually /usr/bin/perl).
 #
 # Define NO_PERL_MAKEMAKER if you cannot use Makefiles generated by perl's
@@ -529,7 +539,6 @@ SCRIPT_PERL += git-archimport.perl
 SCRIPT_PERL += git-cvsexportcommit.perl
 SCRIPT_PERL += git-cvsimport.perl
 SCRIPT_PERL += git-cvsserver.perl
-SCRIPT_PERL += git-relink.perl
 SCRIPT_PERL += git-send-email.perl
 SCRIPT_PERL += git-svn.perl
 
@@ -1381,20 +1390,26 @@ ifdef APPLE_COMMON_CRYPTO
        SHA1_MAX_BLOCK_SIZE = 1024L*1024L*1024L
 endif
 
+ifdef DC_SHA1
+       LIB_OBJS += sha1dc/sha1.o
+       LIB_OBJS += sha1dc/ubc_check.o
+       BASIC_CFLAGS += -DSHA1_DC
+else
 ifdef BLK_SHA1
-       SHA1_HEADER = "block-sha1/sha1.h"
        LIB_OBJS += block-sha1/sha1.o
+       BASIC_CFLAGS += -DSHA1_BLK
 else
 ifdef PPC_SHA1
-       SHA1_HEADER = "ppc/sha1.h"
        LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o
+       BASIC_CFLAGS += -DSHA1_PPC
 else
 ifdef APPLE_COMMON_CRYPTO
        COMPAT_CFLAGS += -DCOMMON_DIGEST_FOR_OPENSSL
-       SHA1_HEADER = <CommonCrypto/CommonDigest.h>
+       BASIC_CFLAGS += -DSHA1_APPLE
 else
-       SHA1_HEADER = <openssl/sha.h>
        EXTLIBS += $(LIB_4_CRYPTO)
+       BASIC_CFLAGS += -DSHA1_OPENSSL
+endif
 endif
 endif
 endif
@@ -1586,7 +1601,6 @@ endif
 
 # Shell quote (do not use $(call) to accommodate ancient setups);
 
-SHA1_HEADER_SQ = $(subst ','\'',$(SHA1_HEADER))
 ETC_GITCONFIG_SQ = $(subst ','\'',$(ETC_GITCONFIG))
 ETC_GITATTRIBUTES_SQ = $(subst ','\'',$(ETC_GITATTRIBUTES))
 
@@ -1619,8 +1633,7 @@ PERLLIB_EXTRA_SQ = $(subst ','\'',$(PERLLIB_EXTRA))
 # from the dependency list, that would make each entry appear twice.
 LIBS = $(filter-out %.o, $(GITLIBS)) $(EXTLIBS)
 
-BASIC_CFLAGS += -DSHA1_HEADER='$(SHA1_HEADER_SQ)' \
-       $(COMPAT_CFLAGS)
+BASIC_CFLAGS += $(COMPAT_CFLAGS)
 LIB_OBJS += $(COMPAT_OBJS)
 
 # Quote for C
@@ -2223,6 +2236,7 @@ GIT-BUILD-OPTIONS: FORCE
        @echo NO_PYTHON=\''$(subst ','\'',$(subst ','\'',$(NO_PYTHON)))'\' >>$@+
        @echo NO_UNIX_SOCKETS=\''$(subst ','\'',$(subst ','\'',$(NO_UNIX_SOCKETS)))'\' >>$@+
        @echo PAGER_ENV=\''$(subst ','\'',$(subst ','\'',$(PAGER_ENV)))'\' >>$@+
+       @echo DC_SHA1=\''$(subst ','\'',$(subst ','\'',$(DC_SHA1)))'\' >>$@+
 ifdef TEST_OUTPUT_DIRECTORY
        @echo TEST_OUTPUT_DIRECTORY=\''$(subst ','\'',$(subst ','\'',$(TEST_OUTPUT_DIRECTORY)))'\' >>$@+
 endif