commit 30c217ef6411d24b8c8b0478b89335dc2dabe6e8
author Antoine Tenart <antoine.tenart@bootlin.com> Tue May 29 14:13:45 2018 +0200
committer Herbert Xu <herbert@gondor.apana.org.au> Fri Jun 22 23:03:02 2018 +0800
tree 7505b9dc1f4f7d4a05d221d61c640879b46d1614
parent 25bc95510317dc7259299adb786f050617199b42

crypto: sha512_generic - add a sha512 0-length pre-computed hash

This patch adds the sha512 pre-computed 0-length hash so that device
drivers can use it when an hardware engine does not support computing a
hash from a 0 length input.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

include/crypto/sha.h

diff --git a/include/crypto/sha.h b/include/crypto/sha.h
index 0555b57..799f071 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -71,6 +71,8 @@ extern const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE];
 
 extern const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE];
 
+extern const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE];
+
 struct sha1_state {
 	u32 state[SHA1_DIGEST_SIZE / 4];
 	u64 count;