From 26f7120b86a964a886ececb9eb8e6dd50276dbb2 Mon Sep 17 00:00:00 2001 From: Antoine Tenart Date: Tue, 29 May 2018 14:13:49 +0200 Subject: crypto: sha512_generic - add a sha384 0-length pre-computed hash This patch adds the sha384 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 Signed-off-by: Herbert Xu --- crypto/sha512_generic.c | 10 ++++++++++ include/crypto/sha.h | 2 ++ 2 files changed, 12 insertions(+) diff --git a/crypto/sha512_generic.c b/crypto/sha512_generic.c index 439723d9273e..0b805d03b5e5 100644 --- a/crypto/sha512_generic.c +++ b/crypto/sha512_generic.c @@ -23,6 +23,16 @@ #include #include +const u8 sha384_zero_message_hash[SHA384_DIGEST_SIZE] = { + 0x38, 0xb0, 0x60, 0xa7, 0x51, 0xac, 0x96, 0x38, + 0x4c, 0xd9, 0x32, 0x7e, 0xb1, 0xb1, 0xe3, 0x6a, + 0x21, 0xfd, 0xb7, 0x11, 0x14, 0xbe, 0x07, 0x43, + 0x4c, 0x0c, 0xc7, 0xbf, 0x63, 0xf6, 0xe1, 0xda, + 0x27, 0x4e, 0xde, 0xbf, 0xe7, 0x6f, 0x65, 0xfb, + 0xd5, 0x1a, 0xd2, 0xf1, 0x48, 0x98, 0xb9, 0x5b +}; +EXPORT_SYMBOL_GPL(sha384_zero_message_hash); + const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE] = { 0xcf, 0x83, 0xe1, 0x35, 0x7e, 0xef, 0xb8, 0xbd, 0xf1, 0x54, 0x28, 0x50, 0xd6, 0x6d, 0x80, 0x07, diff --git a/include/crypto/sha.h b/include/crypto/sha.h index 799f071b93df..8a46202b1857 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 sha384_zero_message_hash[SHA384_DIGEST_SIZE]; + extern const u8 sha512_zero_message_hash[SHA512_DIGEST_SIZE]; struct sha1_state { -- cgit v1.2.3-70-g09d2