-#!/usr/local/bin/perl
+#! /usr/bin/env perl
+# Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
#
+# Licensed under the OpenSSL license (the "License"). You may not use
+# this file except in compliance with the License. You can obtain a copy
+# in the file LICENSE in the source distribution or at
+# https://www.openssl.org/source/license.html
+
# The inner loop instruction sequence and the IP/FP modifications are from
# Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk>
-#
-push(@INC,"perlasm","../../perlasm");
+$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
+push(@INC,"${dir}","${dir}../../perlasm");
require "x86asm.pl";
require "cbc.pl";
require "desboth.pl";
# format.
#
+$output=pop;
+open STDOUT,">$output";
+
&asm_init($ARGV[0],"des-586.pl");
$L="edi";
$R="esi";
+$trans="ebp";
+$small_footprint=1 if (grep(/\-DOPENSSL_SMALL_FOOTPRINT/,@ARGV));
+# one can discuss setting this variable to 1 unconditionally, as
+# the folded loop is only 3% slower than unrolled, but >7 times smaller
+
+&public_label("DES_SPtrans");
+&static_label("des_sptrans");
-&external_label("DES_SPtrans");
+&DES_encrypt_internal();
+&DES_decrypt_internal();
&DES_encrypt("DES_encrypt1",1);
&DES_encrypt("DES_encrypt2",0);
&DES_encrypt3("DES_encrypt3",1);
&asm_finish();
+close STDOUT;
+
+sub DES_encrypt_internal()
+ {
+ &function_begin_B("_x86_DES_encrypt");
+
+ if ($small_footprint)
+ {
+ &lea("edx",&DWP(128,"ecx"));
+ &push("edx");
+ &push("ecx");
+ &set_label("eloop");
+ &D_ENCRYPT(0,$L,$R,0,$trans,"eax","ebx","ecx","edx",&swtmp(0));
+ &comment("");
+ &D_ENCRYPT(1,$R,$L,2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
+ &comment("");
+ &add("ecx",16);
+ &cmp("ecx",&swtmp(1));
+ &mov(&swtmp(0),"ecx");
+ &jb(&label("eloop"));
+ &add("esp",8);
+ }
+ else
+ {
+ &push("ecx");
+ for ($i=0; $i<16; $i+=2)
+ {
+ &comment("Round $i");
+ &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
+ &comment("Round ".sprintf("%d",$i+1));
+ &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
+ }
+ &add("esp",4);
+ }
+ &ret();
+
+ &function_end_B("_x86_DES_encrypt");
+ }
+
+sub DES_decrypt_internal()
+ {
+ &function_begin_B("_x86_DES_decrypt");
+
+ if ($small_footprint)
+ {
+ &push("ecx");
+ &lea("ecx",&DWP(128,"ecx"));
+ &push("ecx");
+ &set_label("dloop");
+ &D_ENCRYPT(0,$L,$R,-2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
+ &comment("");
+ &D_ENCRYPT(1,$R,$L,-4,$trans,"eax","ebx","ecx","edx",&swtmp(0));
+ &comment("");
+ &sub("ecx",16);
+ &cmp("ecx",&swtmp(1));
+ &mov(&swtmp(0),"ecx");
+ &ja(&label("dloop"));
+ &add("esp",8);
+ }
+ else
+ {
+ &push("ecx");
+ for ($i=15; $i>0; $i-=2)
+ {
+ &comment("Round $i");
+ &D_ENCRYPT(15-$i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
+ &comment("Round ".sprintf("%d",$i-1));
+ &D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
+ }
+ &add("esp",4);
+ }
+ &ret();
+
+ &function_end_B("_x86_DES_decrypt");
+ }
+
sub DES_encrypt
{
local($name,$do_ip)=@_;
- &function_begin_B($name,"EXTRN _DES_SPtrans:DWORD");
+ &function_begin_B($name);
&push("esi");
&push("edi");
&comment("");
&comment("Load the 2 words");
- $trans="ebp";
if ($do_ip)
{
}
# PIC-ification:-)
- &picmeup($trans,"DES_SPtrans");
- #if ($cpp) { &picmeup($trans,"DES_SPtrans"); }
- #else { &lea($trans,&DWP("DES_SPtrans")); }
+ &call (&label("pic_point"));
+ &set_label("pic_point");
+ &blindpop($trans);
+ &lea ($trans,&DWP(&label("des_sptrans")."-".&label("pic_point"),$trans));
&mov( "ecx", &wparam(1) );
- &cmp("ebx","0");
- &je(&label("start_decrypt"));
-
- for ($i=0; $i<16; $i+=2)
- {
- &comment("");
- &comment("Round $i");
- &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx");
-
- &comment("");
- &comment("Round ".sprintf("%d",$i+1));
- &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx");
- }
- &jmp(&label("end"));
-
- &set_label("start_decrypt");
-
- for ($i=15; $i>0; $i-=2)
- {
- &comment("");
- &comment("Round $i");
- &D_ENCRYPT(15-$i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx");
- &comment("");
- &comment("Round ".sprintf("%d",$i-1));
- &D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$trans,"eax","ebx","ecx","edx");
- }
- &set_label("end");
+ &cmp("ebx","0");
+ &je(&label("decrypt"));
+ &call("_x86_DES_encrypt");
+ &jmp(&label("done"));
+ &set_label("decrypt");
+ &call("_x86_DES_decrypt");
+ &set_label("done");
if ($do_ip)
{
sub D_ENCRYPT
{
- local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t)=@_;
+ local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t,$wp1)=@_;
&mov( $u, &DWP(&n2a($S*4),$tmp2,"",0));
&xor( $tmp1, $tmp1);
&and( $t, "0xff" );
&xor( $L, &DWP("0x600",$trans,$tmp1,0));
&xor( $L, &DWP("0x700",$trans,$tmp2,0));
- &mov( $tmp2, &wparam(1) );
+ &mov( $tmp2, $wp1 );
&xor( $L, &DWP("0x400",$trans,$u,0));
&xor( $L, &DWP("0x500",$trans,$t,0));
}
&R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
&R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
&R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
-
+
if ($lr != 3)
{
if (($lr-3) < 0)
sub DES_SPtrans
{
- &public_label("DES_SPtrans");
&set_label("DES_SPtrans",64);
+ &set_label("des_sptrans");
&data_word(0x02080800, 0x00080000, 0x02000002, 0x02080802);
&data_word(0x02000000, 0x00080802, 0x00080002, 0x02000002);
&data_word(0x00080802, 0x02080800, 0x02080000, 0x00000802);
projects / openssl.git / blobdiff