From: Huang Ying <ying.huang@intel.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org
Subject: [BUGFIX 1/3] crypto: Fix AES-NI cbc mode IV saving
Date: Mon, 15 Jun 2009 17:04:44 +0800 [thread overview]
Message-ID: <1245056684.5320.347.camel@yhuang-dev.sh.intel.com> (raw)
Original implementation of aesni_cbc_dec do not save IV if input
length % 4 == 0. This will make decryption of next block failed.
Signed-off-by: Huang Ying <ying.huang@intel.com>
---
arch/x86/crypto/aesni-intel_asm.S | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -845,7 +845,7 @@ ENTRY(aesni_cbc_enc)
*/
ENTRY(aesni_cbc_dec)
cmp $16, LEN
- jb .Lcbc_dec_ret
+ jb .Lcbc_dec_just_ret
mov 480(KEYP), KLEN
add $240, KEYP
movups (IVP), IV
@@ -891,6 +891,7 @@ ENTRY(aesni_cbc_dec)
add $16, OUTP
cmp $16, LEN
jge .Lcbc_dec_loop1
- movups IV, (IVP)
.Lcbc_dec_ret:
+ movups IV, (IVP)
+.Lcbc_dec_just_ret:
ret
next reply other threads:[~2009-06-15 9:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-15 9:04 Huang Ying [this message]
2009-06-18 11:45 ` Herbert Xu
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