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authorLABBE Corentin <clabbe.montjoie@gmail.com>2015-12-17 13:45:39 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2015-12-22 20:43:35 +0800
commit0c4c78de0417ced1da92351a3013e631860ea576 (patch)
tree1901728828a5891d3a8e1f5db23226682a9bb41d /crypto/md5.c
parent51d77dddfff4a554744bfa0e67cf571319635645 (diff)
downloadlinux-0c4c78de0417ced1da92351a3013e631860ea576.tar.bz2
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/md5.c')
-rw-r--r--crypto/md5.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/crypto/md5.c b/crypto/md5.c
index 33d17e9a8702..2355a7c25c45 100644
--- a/crypto/md5.c
+++ b/crypto/md5.c
@@ -24,6 +24,12 @@
#include <linux/cryptohash.h>
#include <asm/byteorder.h>
+const u8 md5_zero_message_hash[MD5_DIGEST_SIZE] = {
+ 0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04,
+ 0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e,
+};
+EXPORT_SYMBOL_GPL(md5_zero_message_hash);
+
/* XXX: this stuff can be optimized */
static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
{