Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1244923

[PATCH 1/8] crypto: hash: add zero length message hash for shax and md5

Show all headers | View raw

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>
---
 include/crypto/md5.h |  5 +++++
 include/crypto/sha.h | 20 ++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/include/crypto/md5.h b/include/crypto/md5.h
index 146af82..6496ee0 100644
--- a/include/crypto/md5.h
+++ b/include/crypto/md5.h
@@ -13,6 +13,11 @@
 #define MD5_H2	0x98badcfeUL
 #define MD5_H3	0x10325476UL
 
+static 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,
+};
+
 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 dd7905a..02d7ffb 100644
--- a/include/crypto/sha.h
+++ b/include/crypto/sha.h
@@ -64,6 +64,26 @@
 #define SHA512_H6	0x1f83d9abfb41bd6bULL
 #define SHA512_H7	0x5be0cd19137e2179ULL
 
+static 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
+};
+
+static const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE] = {
+	0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47,
+	0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2,
+	0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4,
+	0x2f
+};
+
+static const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = {
+	0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
+	0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
+	0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
+	0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55
+};
+
 struct sha1_state {
 	u32 state[SHA1_DIGEST_SIZE / 4];
 	u64 count;
-- 
2.4.9

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH] crypto: add precalculated hash for zero message length LABBE Corentin <clabbe.montjoie@gmail.com> - 2015-10-12 19:00 +0200
  [PATCH 8/8] crypto: testmgr: Use the xxx_zero_message_hash from headers LABBE Corentin <clabbe.montjoie@gmail.com> - 2015-10-12 19:00 +0200
    Re: [PATCH 8/8] crypto: testmgr: Use the xxx_zero_message_hash from  headers kbuild test robot <lkp@intel.com> - 2015-10-12 21:30 +0200
      Re: [PATCH 8/8] crypto: testmgr: Use the xxx_zero_message_hash from  headers Corentin LABBE <clabbe.montjoie@gmail.com> - 2015-10-12 21:40 +0200
  [PATCH 3/8] crypto: ccp: Use precalculated hash from headers LABBE Corentin <clabbe.montjoie@gmail.com> - 2015-10-12 19:00 +0200
  [PATCH 1/8] crypto: hash: add zero length message hash for shax and md5 LABBE Corentin <clabbe.montjoie@gmail.com> - 2015-10-12 19:00 +0200
    Re: [PATCH 1/8] crypto: hash: add zero length message hash for shax  and md5 Herbert Xu <herbert@gondor.apana.org.au> - 2015-10-14 12:10 +0200
      Re: [PATCH 1/8] crypto: hash: add zero length message hash for shax  and md5 LABBE Corentin <montjoie.mailing@gmail.com> - 2015-10-15 11:50 +0200
        Re: [PATCH 1/8] crypto: hash: add zero length message hash for shax  and md5 Ulf Hansson <ulf.hansson@linaro.org> - 2015-10-16 13:30 +0200
  [PATCH 5/8] crypto: akcipher: fix typos in include/crypto/akcipher.h LABBE Corentin <clabbe.montjoie@gmail.com> - 2015-10-12 19:00 +0200

csiph-web