From 0c4c78de0417ced1da92351a3013e631860ea576 Mon Sep 17 00:00:00 2001
From: LABBE Corentin <clabbe.montjoie@gmail.com>
Date: Thu, 17 Dec 2015 13:45:39 +0100
Subject: 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>
---
 crypto/sha1_generic.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'crypto/sha1_generic.c')

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)
 {
-- 
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