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crypto: aes-ni - Fix cbc mode IV saving

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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>
This commit is contained in:
Huang Ying 2009-06-18 19:33:57 +08:00 • committed by Herbert Xu
parent 8d8409f773
commit e6efaa0253
1 changed files with 3 additions and 2 deletions
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5
arch/x86/crypto/aesni-intel_asm.S
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@ -845,7 +845,7 @@ ENTRY(aesni_cbc_enc)
*/ */
ENTRY(aesni_cbc_dec) ENTRY(aesni_cbc_dec)
cmp $16, LEN cmp $16, LEN
jb .Lcbc_dec_ret jb .Lcbc_dec_just_ret
mov 480(KEYP), KLEN mov 480(KEYP), KLEN
add $240, KEYP add $240, KEYP
movups (IVP), IV movups (IVP), IV
@ -891,6 +891,7 @@ ENTRY(aesni_cbc_dec)
add $16, OUTP add $16, OUTP
cmp $16, LEN cmp $16, LEN
jge .Lcbc_dec_loop1 jge .Lcbc_dec_loop1
movups IV, (IVP)
.Lcbc_dec_ret: .Lcbc_dec_ret:
movups IV, (IVP)
.Lcbc_dec_just_ret:
ret ret