A local copy of OpenSSL from GitHub
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#! /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
$L="edi";
$R="esi";
sub DES_encrypt3
{
local($name,$enc)=@_;
&function_begin_B($name,"");
&push("ebx");
&mov("ebx",&wparam(0));
&push("ebp");
&push("esi");
&push("edi");
&comment("");
&comment("Load the data words");
&mov($L,&DWP(0,"ebx","",0));
&mov($R,&DWP(4,"ebx","",0));
&stack_push(3);
&comment("");
&comment("IP");
&IP_new($L,$R,"edx",0);
# put them back
if ($enc)
{
&mov(&DWP(4,"ebx","",0),$R);
&mov("eax",&wparam(1));
&mov(&DWP(0,"ebx","",0),"edx");
&mov("edi",&wparam(2));
&mov("esi",&wparam(3));
}
else
{
&mov(&DWP(4,"ebx","",0),$R);
&mov("esi",&wparam(1));
&mov(&DWP(0,"ebx","",0),"edx");
&mov("edi",&wparam(2));
&mov("eax",&wparam(3));
}
&mov(&swtmp(2), (DWC(($enc)?"1":"0")));
&mov(&swtmp(1), "eax");
&mov(&swtmp(0), "ebx");
&call("DES_encrypt2");
&mov(&swtmp(2), (DWC(($enc)?"0":"1")));
&mov(&swtmp(1), "edi");
&mov(&swtmp(0), "ebx");
&call("DES_encrypt2");
&mov(&swtmp(2), (DWC(($enc)?"1":"0")));
&mov(&swtmp(1), "esi");
&mov(&swtmp(0), "ebx");
&call("DES_encrypt2");
&stack_pop(3);
&mov($L,&DWP(0,"ebx","",0));
&mov($R,&DWP(4,"ebx","",0));
&comment("");
&comment("FP");
&FP_new($L,$R,"eax",0);
&mov(&DWP(0,"ebx","",0),"eax");
&mov(&DWP(4,"ebx","",0),$R);
&pop("edi");
&pop("esi");
&pop("ebp");
&pop("ebx");
&ret();
&function_end_B($name);
}