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hash: add an SHA-256 implementation using OpenSSL 

We already have OpenSSL routines available for SHA-1, so add routines
for SHA-256 as well.

On a Core i7-6600U, this SHA-256 implementation compares favorably to
the SHA1DC SHA-1 implementation:

SHA-1: 157 MiB/s (64 byte chunks); 337 MiB/s (16 KiB chunks)
SHA-256: 165 MiB/s (64 byte chunks); 408 MiB/s (16 KiB chunks)

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2018-11-14 04:09:38 +00:00 committed by Junio C Hamano
parent 27dc04c545
commit 4b4e291809
2 changed files with 9 additions and 0 deletions
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7
Makefile
View File

@ -183,6 +183,8 @@ all::
#
# Define GCRYPT_SHA256 to use the SHA-256 routines in libgcrypt.
#
# Define OPENSSL_SHA256 to use the SHA-256 routines in OpenSSL.
#
# Define NEEDS_CRYPTO_WITH_SSL if you need -lcrypto when using -lssl (Darwin).
#
# Define NEEDS_SSL_WITH_CRYPTO if you need -lssl when using -lcrypto (Darwin).
@ -1638,6 +1640,10 @@ endif
endif
endif
ifdef OPENSSL_SHA256
EXTLIBS += $(LIB_4_CRYPTO)
BASIC_CFLAGS += -DSHA256_OPENSSL
else
ifdef GCRYPT_SHA256
BASIC_CFLAGS += -DSHA256_GCRYPT
EXTLIBS += -lgcrypt
@ -1645,6 +1651,7 @@ else
LIB_OBJS += sha256/block/sha256.o
BASIC_CFLAGS += -DSHA256_BLK
endif
endif
ifdef SHA1_MAX_BLOCK_SIZE
LIB_OBJS += compat/sha1-chunked.o

2
hash.h
View File

@ -17,6 +17,8 @@
#if defined(SHA256_GCRYPT)
#include "sha256/gcrypt.h"
#elif defined(SHA256_OPENSSL)
#include <openssl/sha.h>
#else
#include "sha256/block/sha256.h"
#endif