From 0c4c78de0417ced1da92351a3013e631860ea576 Mon Sep 17 00:00:00 2001 From: LABBE Corentin 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 Signed-off-by: Herbert Xu --- include/crypto/md5.h | 2 ++ include/crypto/sha.h | 6 ++++++ 2 files changed, 8 insertions(+) (limited to 'include') diff --git a/include/crypto/md5.h b/include/crypto/md5.h index 146af825eedb..327deac963c0 100644 --- a/include/crypto/md5.h +++ b/include/crypto/md5.h @@ -13,6 +13,8 @@ #define MD5_H2 0x98badcfeUL #define MD5_H3 0x10325476UL +extern const u8 md5_zero_message_hash[MD5_DIGEST_SIZE]; + struct md5_state { u32 hash[MD5_HASH_WORDS]; u32 block[MD5_BLOCK_WORDS]; diff --git a/include/crypto/sha.h b/include/crypto/sha.h index dd7905a3c22e..c94d3eb1cefd 100644 --- a/include/crypto/sha.h +++ b/include/crypto/sha.h @@ -64,6 +64,12 @@ #define SHA512_H6 0x1f83d9abfb41bd6bULL #define SHA512_H7 0x5be0cd19137e2179ULL +extern const u8 sha1_zero_message_hash[SHA1_DIGEST_SIZE]; + +extern const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE]; + +extern const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE]; + struct sha1_state { u32 state[SHA1_DIGEST_SIZE / 4]; u64 count; -- cgit v1.2.3