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vpaes-x86[_64].pl: handle zero length in vpaes_cbc_encrypt [from HEAD].

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PR: 2775
This commit is contained in:
Andy Polyakov 2012-03-31 16:55:18 +00:00
parent 67d216801b
commit 6296729fae
2 changed files with 7 additions and 3 deletions
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4
crypto/aes/asm/vpaes-x86.pl
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@ -843,6 +843,8 @@ $k_dsbo=0x2c0; # decryption sbox final output
&mov ($out,&wparam(1)); # out
&mov ($round,&wparam(2)); # len
&mov ($key,&wparam(3)); # key
&sub ($round,16);
&jc (&label("cbc_abort"));
&lea ($base,&DWP(-56,"esp"));
&mov ($const,&wparam(4)); # ivp
&and ($base,-16);
@ -853,7 +855,6 @@ $k_dsbo=0x2c0; # decryption sbox final output
&mov (&DWP(48,"esp"),$base);
&mov (&DWP(0,"esp"),$out); # save out
&sub ($round,16);
&mov (&DWP(4,"esp"),$key) # save key
&mov (&DWP(8,"esp"),$const); # save ivp
&mov ($out,$round); # $out works as $len
@ -896,6 +897,7 @@ $k_dsbo=0x2c0; # decryption sbox final output
&mov ($base,&DWP(8,"esp")); # restore ivp
&mov ("esp",&DWP(48,"esp"));
&movdqu (&QWP(0,$base),"xmm1"); # write IV
&set_label("cbc_abort");
&function_end("${PREFIX}_cbc_encrypt");
&asm_finish();

6
crypto/aes/asm/vpaes-x86_64.pl
View File

@ -263,7 +263,7 @@ _vpaes_decrypt_core:
pshufb %xmm2, %xmm4 # 4 = sbou
pxor %xmm0, %xmm4 # 4 = sb1u + k
movdqa 0x70(%r10), %xmm0 # 0 : sbot
movdqa .Lk_sr-.Lk_dsbd(%r11), %xmm2
movdqa -0x160(%r11), %xmm2 # .Lk_sr-.Lk_dsbd=-0x160
pshufb %xmm3, %xmm0 # 0 = sb1t
pxor %xmm4, %xmm0 # 0 = A
pshufb %xmm2, %xmm0
@ -869,6 +869,8 @@ ${PREFIX}_cbc_encrypt:
___
($len,$key)=($key,$len);
$code.=<<___;
sub \$16,$len
jc .Lcbc_abort
___
$code.=<<___ if ($win64);
lea -0xb8(%rsp),%rsp
@ -887,7 +889,6 @@ ___
$code.=<<___;
movdqu ($ivp),%xmm6 # load IV
sub $inp,$out
sub \$16,$len
call _vpaes_preheat
cmp \$0,${enc}d
je .Lcbc_dec_loop
@ -932,6 +933,7 @@ $code.=<<___ if ($win64);
.Lcbc_epilogue:
___
$code.=<<___;
.Lcbc_abort:
ret
.size ${PREFIX}_cbc_encrypt,.-${PREFIX}_cbc_encrypt
___