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#! /usr/bin/env perl
# Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (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.
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
push(@INC,"${dir}","${dir}../../perlasm");
require "x86asm.pl";
require "cbc.pl";
require "desboth.pl";
# base code is in Microsoft
# op dest, source
# format.
#
$output=pop and open STDOUT,">$output";
&asm_init($ARGV[0]);
$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");
&DES_encrypt_internal();
&DES_decrypt_internal();
&DES_encrypt("DES_encrypt1",1);
&DES_encrypt("DES_encrypt2",0);
&DES_encrypt3("DES_encrypt3",1);
&DES_encrypt3("DES_decrypt3",0);
&cbc("DES_ncbc_encrypt","DES_encrypt1","DES_encrypt1",0,4,5,3,5,-1);
&cbc("DES_ede3_cbc_encrypt","DES_encrypt3","DES_decrypt3",0,6,7,3,4,5);
&DES_SPtrans();
&asm_finish();
close STDOUT or die "error closing 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($name);
&push("esi");
&push("edi");
&comment("");
&comment("Load the 2 words");
if ($do_ip)
{
&mov($R,&wparam(0));
&xor( "ecx", "ecx" );
&push("ebx");
&push("ebp");
&mov("eax",&DWP(0,$R,"",0));
&mov("ebx",&wparam(2)); # get encrypt flag
&mov($L,&DWP(4,$R,"",0));
&comment("");
&comment("IP");
&IP_new("eax",$L,$R,3);
}
else
{
&mov("eax",&wparam(0));
&xor( "ecx", "ecx" );
&push("ebx");
&push("ebp");
&mov($R,&DWP(0,"eax","",0));
&mov("ebx",&wparam(2)); # get encrypt flag
&rotl($R,3);
&mov($L,&DWP(4,"eax","",0));
&rotl($L,3);
}
# PIC-ification:-)
&call (&label("pic_point"));
&set_label("pic_point");
&blindpop($trans);
&lea ($trans,&DWP(&label("des_sptrans")."-".&label("pic_point"),$trans));
&mov( "ecx", &wparam(1) );
&cmp("ebx","0");
&je(&label("decrypt"));
&call("_x86_DES_encrypt");
&jmp(&label("done"));
&set_label("decrypt");
&call("_x86_DES_decrypt");
&set_label("done");
if ($do_ip)
{
&comment("");
&comment("FP");
&mov("edx",&wparam(0));
&FP_new($L,$R,"eax",3);
&mov(&DWP(0,"edx","",0),"eax");
&mov(&DWP(4,"edx","",0),$R);
}
else
{
&comment("");
&comment("Fixup");
&rotr($L,3); # r
&mov("eax",&wparam(0));
&rotr($R,3); # l
&mov(&DWP(0,"eax","",0),$L);
&mov(&DWP(4,"eax","",0),$R);
}
&pop("ebp");
&pop("ebx");
&pop("edi");
&pop("esi");
&ret();
&function_end_B($name);
}
sub D_ENCRYPT
{
local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t,$wp1)=@_;
&mov( $u, &DWP(&n2a($S*4),$tmp2,"",0));
&xor( $tmp1, $tmp1);
&mov( $t, &DWP(&n2a(($S+1)*4),$tmp2,"",0));
&xor( $u, $R);
&xor( $tmp2, $tmp2);
&xor( $t, $R);
&and( $u, "0xfcfcfcfc" );
&and( $t, "0xcfcfcfcf" );
&movb( &LB($tmp1), &LB($u) );
&movb( &LB($tmp2), &HB($u) );
&rotr( $t, 4 );
&xor( $L, &DWP(" ",$trans,$tmp1,0));
&movb( &LB($tmp1), &LB($t) );
&xor( $L, &DWP("0x200",$trans,$tmp2,0));
&movb( &LB($tmp2), &HB($t) );
&shr( $u, 16);
&xor( $L, &DWP("0x100",$trans,$tmp1,0));
&movb( &LB($tmp1), &HB($u) );
&shr( $t, 16);
&xor( $L, &DWP("0x300",$trans,$tmp2,0));
&movb( &LB($tmp2), &HB($t) );
&and( $u, "0xff" );
&and( $t, "0xff" );
&xor( $L, &DWP("0x600",$trans,$tmp1,0));
&xor( $L, &DWP("0x700",$trans,$tmp2,0));
&mov( $tmp2, $wp1 );
&xor( $L, &DWP("0x400",$trans,$u,0));
&xor( $L, &DWP("0x500",$trans,$t,0));
}
sub n2a
{
sprintf("%d",$_[0]);
}
# now has a side affect of rotating $a by $shift
sub R_PERM_OP
{
local($a,$b,$tt,$shift,$mask,$last)=@_;
&rotl( $a, $shift ) if ($shift != 0);
&mov( $tt, $a );
&xor( $a, $b );
&and( $a, $mask );
# This can never succeed, and besides it is difficult to see what the
# idea was - Ben 13 Feb 99
if (!$last eq $b)
{
&xor( $b, $a );
&xor( $tt, $a );
}
else
{
&xor( $tt, $a );
&xor( $b, $a );
}
&comment("");
}
sub IP_new
{
local($l,$r,$tt,$lr)=@_;
&R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
&R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
&R_PERM_OP($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 (($lr-3) < 0)
{ &rotr($tt, 3-$lr); }
else { &rotl($tt, $lr-3); }
}
if ($lr != 2)
{
if (($lr-2) < 0)
{ &rotr($r, 2-$lr); }
else { &rotl($r, $lr-2); }
}
}
sub FP_new
{
local($l,$r,$tt,$lr)=@_;
if ($lr != 2)
{
if (($lr-2) < 0)
{ &rotl($r, 2-$lr); }
else { &rotr($r, $lr-2); }
}
if ($lr != 3)
{
if (($lr-3) < 0)
{ &rotl($l, 3-$lr); }
else { &rotr($l, $lr-3); }
}
&R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
&R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
&R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
&R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
&R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
&rotr($tt , 4);
}
sub 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);
&data_word(0x02000802, 0x02000000, 0x00000000, 0x00080002);
&data_word(0x00080000, 0x00000002, 0x02000800, 0x00080800);
&data_word(0x02080802, 0x02080000, 0x00000802, 0x02000800);
&data_word(0x00000002, 0x00000800, 0x00080800, 0x02080002);
&data_word(0x00000800, 0x02000802, 0x02080002, 0x00000000);
&data_word(0x00000000, 0x02080802, 0x02000800, 0x00080002);
&data_word(0x02080800, 0x00080000, 0x00000802, 0x02000800);
&data_word(0x02080002, 0x00000800, 0x00080800, 0x02000002);
&data_word(0x00080802, 0x00000002, 0x02000002, 0x02080000);
&data_word(0x02080802, 0x00080800, 0x02080000, 0x02000802);
&data_word(0x02000000, 0x00000802, 0x00080002, 0x00000000);
&data_word(0x00080000, 0x02000000, 0x02000802, 0x02080800);
&data_word(0x00000002, 0x02080002, 0x00000800, 0x00080802);
# nibble 1
&data_word(0x40108010, 0x00000000, 0x00108000, 0x40100000);
&data_word(0x40000010, 0x00008010, 0x40008000, 0x00108000);
&data_word(0x00008000, 0x40100010, 0x00000010, 0x40008000);
&data_word(0x00100010, 0x40108000, 0x40100000, 0x00000010);
&data_word(0x00100000, 0x40008010, 0x40100010, 0x00008000);
&data_word(0x00108010, 0x40000000, 0x00000000, 0x00100010);
&data_word(0x40008010, 0x00108010, 0x40108000, 0x40000010);
&data_word(0x40000000, 0x00100000, 0x00008010, 0x40108010);
&data_word(0x00100010, 0x40108000, 0x40008000, 0x00108010);
&data_word(0x40108010, 0x00100010, 0x40000010, 0x00000000);
&data_word(0x40000000, 0x00008010, 0x00100000, 0x40100010);
&data_word(0x00008000, 0x40000000, 0x00108010, 0x40008010);
&data_word(0x40108000, 0x00008000, 0x00000000, 0x40000010);
&data_word(0x00000010, 0x40108010, 0x00108000, 0x40100000);
&data_word(0x40100010, 0x00100000, 0x00008010, 0x40008000);
&data_word(0x40008010, 0x00000010, 0x40100000, 0x00108000);
# nibble 2
&data_word(0x04000001, 0x04040100, 0x00000100, 0x04000101);
&data_word(0x00040001, 0x04000000, 0x04000101, 0x00040100);
&data_word(0x04000100, 0x00040000, 0x04040000, 0x00000001);
&data_word(0x04040101, 0x00000101, 0x00000001, 0x04040001);
&data_word(0x00000000, 0x00040001, 0x04040100, 0x00000100);
&data_word(0x00000101, 0x04040101, 0x00040000, 0x04000001);
&data_word(0x04040001, 0x04000100, 0x00040101, 0x04040000);
&data_word(0x00040100, 0x00000000, 0x04000000, 0x00040101);
&data_word(0x04040100, 0x00000100, 0x00000001, 0x00040000);
&data_word(0x00000101, 0x00040001, 0x04040000, 0x04000101);
&data_word(0x00000000, 0x04040100, 0x00040100, 0x04040001);
&data_word(0x00040001, 0x04000000, 0x04040101, 0x00000001);
&data_word(0x00040101, 0x04000001, 0x04000000, 0x04040101);
&data_word(0x00040000, 0x04000100, 0x04000101, 0x00040100);
&data_word(0x04000100, 0x00000000, 0x04040001, 0x00000101);
&data_word(0x04000001, 0x00040101, 0x00000100, 0x04040000);
# nibble 3
&data_word(0x00401008, 0x10001000, 0x00000008, 0x10401008);
&data_word(0x00000000, 0x10400000, 0x10001008, 0x00400008);
&data_word(0x10401000, 0x10000008, 0x10000000, 0x00001008);
&data_word(0x10000008, 0x00401008, 0x00400000, 0x10000000);
&data_word(0x10400008, 0x00401000, 0x00001000, 0x00000008);
&data_word(0x00401000, 0x10001008, 0x10400000, 0x00001000);
&data_word(0x00001008, 0x00000000, 0x00400008, 0x10401000);
&data_word(0x10001000, 0x10400008, 0x10401008, 0x00400000);
&data_word(0x10400008, 0x00001008, 0x00400000, 0x10000008);
&data_word(0x00401000, 0x10001000, 0x00000008, 0x10400000);
&data_word(0x10001008, 0x00000000, 0x00001000, 0x00400008);
&data_word(0x00000000, 0x10400008, 0x10401000, 0x00001000);
&data_word(0x10000000, 0x10401008, 0x00401008, 0x00400000);
&data_word(0x10401008, 0x00000008, 0x10001000, 0x00401008);
&data_word(0x00400008, 0x00401000, 0x10400000, 0x10001008);
&data_word(0x00001008, 0x10000000, 0x10000008, 0x10401000);
# nibble 4
&data_word(0x08000000, 0x00010000, 0x00000400, 0x08010420);
&data_word(0x08010020, 0x08000400, 0x00010420, 0x08010000);
&data_word(0x00010000, 0x00000020, 0x08000020, 0x00010400);
&data_word(0x08000420, 0x08010020, 0x08010400, 0x00000000);
&data_word(0x00010400, 0x08000000, 0x00010020, 0x00000420);
&data_word(0x08000400, 0x00010420, 0x00000000, 0x08000020);
&data_word(0x00000020, 0x08000420, 0x08010420, 0x00010020);
&data_word(0x08010000, 0x00000400, 0x00000420, 0x08010400);
&data_word(0x08010400, 0x08000420, 0x00010020, 0x08010000);
&data_word(0x00010000, 0x00000020, 0x08000020, 0x08000400);
&data_word(0x08000000, 0x00010400, 0x08010420, 0x00000000);
&data_word(0x00010420, 0x08000000, 0x00000400, 0x00010020);
&data_word(0x08000420, 0x00000400, 0x00000000, 0x08010420);
&data_word(0x08010020, 0x08010400, 0x00000420, 0x00010000);
&data_word(0x00010400, 0x08010020, 0x08000400, 0x00000420);
&data_word(0x00000020, 0x00010420, 0x08010000, 0x08000020);
# nibble 5
&data_word(0x80000040, 0x00200040, 0x00000000, 0x80202000);
&data_word(0x00200040, 0x00002000, 0x80002040, 0x00200000);
&data_word(0x00002040, 0x80202040, 0x00202000, 0x80000000);
&data_word(0x80002000, 0x80000040, 0x80200000, 0x00202040);
&data_word(0x00200000, 0x80002040, 0x80200040, 0x00000000);
&data_word(0x00002000, 0x00000040, 0x80202000, 0x80200040);
&data_word(0x80202040, 0x80200000, 0x80000000, 0x00002040);
&data_word(0x00000040, 0x00202000, 0x00202040, 0x80002000);
&data_word(0x00002040, 0x80000000, 0x80002000, 0x00202040);
&data_word(0x80202000, 0x00200040, 0x00000000, 0x80002000);
&data_word(0x80000000, 0x00002000, 0x80200040, 0x00200000);
&data_word(0x00200040, 0x80202040, 0x00202000, 0x00000040);
&data_word(0x80202040, 0x00202000, 0x00200000, 0x80002040);
&data_word(0x80000040, 0x80200000, 0x00202040, 0x00000000);
&data_word(0x00002000, 0x80000040, 0x80002040, 0x80202000);
&data_word(0x80200000, 0x00002040, 0x00000040, 0x80200040);
# nibble 6
&data_word(0x00004000, 0x00000200, 0x01000200, 0x01000004);
&data_word(0x01004204, 0x00004004, 0x00004200, 0x00000000);
&data_word(0x01000000, 0x01000204, 0x00000204, 0x01004000);
&data_word(0x00000004, 0x01004200, 0x01004000, 0x00000204);
&data_word(0x01000204, 0x00004000, 0x00004004, 0x01004204);
&data_word(0x00000000, 0x01000200, 0x01000004, 0x00004200);
&data_word(0x01004004, 0x00004204, 0x01004200, 0x00000004);
&data_word(0x00004204, 0x01004004, 0x00000200, 0x01000000);
&data_word(0x00004204, 0x01004000, 0x01004004, 0x00000204);
&data_word(0x00004000, 0x00000200, 0x01000000, 0x01004004);
&data_word(0x01000204, 0x00004204, 0x00004200, 0x00000000);
&data_word(0x00000200, 0x01000004, 0x00000004, 0x01000200);
&data_word(0x00000000, 0x01000204, 0x01000200, 0x00004200);
&data_word(0x00000204, 0x00004000, 0x01004204, 0x01000000);
&data_word(0x01004200, 0x00000004, 0x00004004, 0x01004204);
&data_word(0x01000004, 0x01004200, 0x01004000, 0x00004004);
# nibble 7
&data_word(0x20800080, 0x20820000, 0x00020080, 0x00000000);
&data_word(0x20020000, 0x00800080, 0x20800000, 0x20820080);
&data_word(0x00000080, 0x20000000, 0x00820000, 0x00020080);
&data_word(0x00820080, 0x20020080, 0x20000080, 0x20800000);
&data_word(0x00020000, 0x00820080, 0x00800080, 0x20020000);
&data_word(0x20820080, 0x20000080, 0x00000000, 0x00820000);
&data_word(0x20000000, 0x00800000, 0x20020080, 0x20800080);
&data_word(0x00800000, 0x00020000, 0x20820000, 0x00000080);
&data_word(0x00800000, 0x00020000, 0x20000080, 0x20820080);
&data_word(0x00020080, 0x20000000, 0x00000000, 0x00820000);
&data_word(0x20800080, 0x20020080, 0x20020000, 0x00800080);
&data_word(0x20820000, 0x00000080, 0x00800080, 0x20020000);
&data_word(0x20820080, 0x00800000, 0x20800000, 0x20000080);
&data_word(0x00820000, 0x00020080, 0x20020080, 0x20800000);
&data_word(0x00000080, 0x20820000, 0x00820080, 0x00000000);
&data_word(0x20000000, 0x20800080, 0x00020000, 0x00820080);
}
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