crypto: aes-ni - Fix cbc mode IV saving
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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S
index caba996..eb0566e 100644
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -845,7 +845,7 @@
*/
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 @@
add $16, OUTP
cmp $16, LEN
jge .Lcbc_dec_loop1
- movups IV, (IVP)
.Lcbc_dec_ret:
+ movups IV, (IVP)
+.Lcbc_dec_just_ret:
ret