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

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PR: 2775
This commit is contained in:
Andy Polyakov
2012-03-31 16:53:34 +00:00
parent 86963f40f8
commit 5db9645f1b
2 changed files with 6 additions and 2 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 ($out,&wparam(1)); # out
&mov ($round,&wparam(2)); # len &mov ($round,&wparam(2)); # len
&mov ($key,&wparam(3)); # key &mov ($key,&wparam(3)); # key
&sub ($round,16);
&jc (&label("cbc_abort"));
&lea ($base,&DWP(-56,"esp")); &lea ($base,&DWP(-56,"esp"));
&mov ($const,&wparam(4)); # ivp &mov ($const,&wparam(4)); # ivp
&and ($base,-16); &and ($base,-16);
@@ -853,7 +855,6 @@ $k_dsbo=0x2c0; # decryption sbox final output
&mov (&DWP(48,"esp"),$base); &mov (&DWP(48,"esp"),$base);
&mov (&DWP(0,"esp"),$out); # save out &mov (&DWP(0,"esp"),$out); # save out
&sub ($round,16);
&mov (&DWP(4,"esp"),$key) # save key &mov (&DWP(4,"esp"),$key) # save key
&mov (&DWP(8,"esp"),$const); # save ivp &mov (&DWP(8,"esp"),$const); # save ivp
&mov ($out,$round); # $out works as $len &mov ($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 ($base,&DWP(8,"esp")); # restore ivp
&mov ("esp",&DWP(48,"esp")); &mov ("esp",&DWP(48,"esp"));
&movdqu (&QWP(0,$base),"xmm1"); # write IV &movdqu (&QWP(0,$base),"xmm1"); # write IV
&set_label("cbc_abort");
&function_end("${PREFIX}_cbc_encrypt"); &function_end("${PREFIX}_cbc_encrypt");
&asm_finish(); &asm_finish();

4
crypto/aes/asm/vpaes-x86_64.pl
View File

@@ -869,6 +869,8 @@ ${PREFIX}_cbc_encrypt:
___ ___
($len,$key)=($key,$len); ($len,$key)=($key,$len);
$code.=<<___; $code.=<<___;
sub \$16,$len
jc .Lcbc_abort
___ ___
$code.=<<___ if ($win64); $code.=<<___ if ($win64);
lea -0xb8(%rsp),%rsp lea -0xb8(%rsp),%rsp
@@ -887,7 +889,6 @@ ___
$code.=<<___; $code.=<<___;
movdqu ($ivp),%xmm6 # load IV movdqu ($ivp),%xmm6 # load IV
sub $inp,$out sub $inp,$out
sub \$16,$len
call _vpaes_preheat call _vpaes_preheat
cmp \$0,${enc}d cmp \$0,${enc}d
je .Lcbc_dec_loop je .Lcbc_dec_loop
@@ -932,6 +933,7 @@ $code.=<<___ if ($win64);
.Lcbc_epilogue: .Lcbc_epilogue:
___ ___
$code.=<<___; $code.=<<___;
.Lcbc_abort:
ret ret
.size ${PREFIX}_cbc_encrypt,.-${PREFIX}_cbc_encrypt .size ${PREFIX}_cbc_encrypt,.-${PREFIX}_cbc_encrypt
___ ___