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authorLABBE Corentin <clabbe.montjoie@gmail.com>2015-12-17 15:45:39 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2015-12-22 15:43:35 +0300
commit0c4c78de0417ced1da92351a3013e631860ea576 (patch)
tree1901728828a5891d3a8e1f5db23226682a9bb41d /crypto/sha1_generic.c
parent51d77dddfff4a554744bfa0e67cf571319635645 (diff)
downloadlinux-0c4c78de0417ced1da92351a3013e631860ea576.tar.xz
crypto: hash - add zero length message hash for shax and md5
Some crypto drivers cannot process empty data message and return a precalculated hash for md5/sha1/sha224/sha256. This patch add thoses precalculated hash in include/crypto. Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/sha1_generic.c')
-rw-r--r--crypto/sha1_generic.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/crypto/sha1_generic.c b/crypto/sha1_generic.c
index 39e3acc438d9..6877cbb9105f 100644
--- a/crypto/sha1_generic.c
+++ b/crypto/sha1_generic.c
@@ -26,6 +26,13 @@
#include <crypto/sha1_base.h>
#include <asm/byteorder.h>
+const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE] = {
+ 0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d,
+ 0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90,
+ 0xaf, 0xd8, 0x07, 0x09
+};
+EXPORT_SYMBOL_GPL(sha1_zero_message_hash);
+
static void sha1_generic_block_fn(struct sha1_state *sst, u8 const *src,
int blocks)
{