| 1 | #! /usr/bin/env perl
|
|---|
| 2 | # Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
|
|---|
| 3 | #
|
|---|
| 4 | # Licensed under the Apache License 2.0 (the "License"). You may not use
|
|---|
| 5 | # this file except in compliance with the License. You can obtain a copy
|
|---|
| 6 | # in the file LICENSE in the source distribution or at
|
|---|
| 7 | # https://www.openssl.org/source/license.html
|
|---|
| 8 |
|
|---|
| 9 | # The inner loop instruction sequence and the IP/FP modifications are from
|
|---|
| 10 | # Svend Olaf Mikkelsen
|
|---|
| 11 |
|
|---|
| 12 | $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
|
|---|
| 13 | push(@INC,"${dir}","${dir}../../perlasm");
|
|---|
| 14 | require "x86asm.pl";
|
|---|
| 15 |
|
|---|
| 16 | $output=pop and open STDOUT,">$output";
|
|---|
| 17 |
|
|---|
| 18 | &asm_init($ARGV[0]);
|
|---|
| 19 |
|
|---|
| 20 | $L="edi";
|
|---|
| 21 | $R="esi";
|
|---|
| 22 |
|
|---|
| 23 | &external_label("DES_SPtrans");
|
|---|
| 24 | &fcrypt_body("fcrypt_body");
|
|---|
| 25 | &asm_finish();
|
|---|
| 26 |
|
|---|
| 27 | close STDOUT or die "error closing STDOUT: $!";
|
|---|
| 28 |
|
|---|
| 29 | sub fcrypt_body
|
|---|
| 30 | {
|
|---|
| 31 | local($name,$do_ip)=@_;
|
|---|
| 32 |
|
|---|
| 33 | &function_begin($name);
|
|---|
| 34 |
|
|---|
| 35 | &comment("");
|
|---|
| 36 | &comment("Load the 2 words");
|
|---|
| 37 | $trans="ebp";
|
|---|
| 38 |
|
|---|
| 39 | &xor( $L, $L);
|
|---|
| 40 | &xor( $R, $R);
|
|---|
| 41 |
|
|---|
| 42 | # PIC-ification:-)
|
|---|
| 43 | &picmeup("edx","DES_SPtrans");
|
|---|
| 44 | #if ($cpp) { &picmeup("edx","DES_SPtrans"); }
|
|---|
| 45 | #else { &lea("edx",&DWP("DES_SPtrans")); }
|
|---|
| 46 | &push("edx"); # becomes &swtmp(1)
|
|---|
| 47 | #
|
|---|
| 48 | &mov($trans,&wparam(1)); # reloaded with DES_SPtrans in D_ENCRYPT
|
|---|
| 49 |
|
|---|
| 50 | &push(&DWC(25)); # add a variable
|
|---|
| 51 |
|
|---|
| 52 | &set_label("start");
|
|---|
| 53 | for ($i=0; $i<16; $i+=2)
|
|---|
| 54 | {
|
|---|
| 55 | &comment("");
|
|---|
| 56 | &comment("Round $i");
|
|---|
| 57 | &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx");
|
|---|
| 58 |
|
|---|
| 59 | &comment("");
|
|---|
| 60 | &comment("Round ".sprintf("%d",$i+1));
|
|---|
| 61 | &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx");
|
|---|
| 62 | }
|
|---|
| 63 | &mov("ebx", &swtmp(0));
|
|---|
| 64 | &mov("eax", $L);
|
|---|
| 65 | &dec("ebx");
|
|---|
| 66 | &mov($L, $R);
|
|---|
| 67 | &mov($R, "eax");
|
|---|
| 68 | &mov(&swtmp(0), "ebx");
|
|---|
| 69 | &jnz(&label("start"));
|
|---|
| 70 |
|
|---|
| 71 | &comment("");
|
|---|
| 72 | &comment("FP");
|
|---|
| 73 | &mov("edx",&wparam(0));
|
|---|
| 74 |
|
|---|
| 75 | &FP_new($R,$L,"eax",3);
|
|---|
| 76 | &mov(&DWP(0,"edx","",0),"eax");
|
|---|
| 77 | &mov(&DWP(4,"edx","",0),$L);
|
|---|
| 78 |
|
|---|
| 79 | &add("esp",8); # remove variables
|
|---|
| 80 |
|
|---|
| 81 | &function_end($name);
|
|---|
| 82 | }
|
|---|
| 83 |
|
|---|
| 84 | sub D_ENCRYPT
|
|---|
| 85 | {
|
|---|
| 86 | local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t)=@_;
|
|---|
| 87 |
|
|---|
| 88 | &mov( $u, &wparam(2)); # 2
|
|---|
| 89 | &mov( $t, $R);
|
|---|
| 90 | &shr( $t, 16); # 1
|
|---|
| 91 | &mov( $tmp2, &wparam(3)); # 2
|
|---|
| 92 | &xor( $t, $R); # 1
|
|---|
| 93 |
|
|---|
| 94 | &and( $u, $t); # 2
|
|---|
| 95 | &and( $t, $tmp2); # 2
|
|---|
| 96 |
|
|---|
| 97 | &mov( $tmp1, $u);
|
|---|
| 98 | &shl( $tmp1, 16); # 1
|
|---|
| 99 | &mov( $tmp2, $t);
|
|---|
| 100 | &shl( $tmp2, 16); # 1
|
|---|
| 101 | &xor( $u, $tmp1); # 2
|
|---|
| 102 | &xor( $t, $tmp2); # 2
|
|---|
| 103 | &mov( $tmp1, &DWP(&n2a($S*4),$trans,"",0)); # 2
|
|---|
| 104 | &xor( $u, $tmp1);
|
|---|
| 105 | &mov( $tmp2, &DWP(&n2a(($S+1)*4),$trans,"",0)); # 2
|
|---|
| 106 | &xor( $u, $R);
|
|---|
| 107 | &xor( $t, $R);
|
|---|
| 108 | &xor( $t, $tmp2);
|
|---|
| 109 |
|
|---|
| 110 | &and( $u, "0xfcfcfcfc" ); # 2
|
|---|
| 111 | &xor( $tmp1, $tmp1); # 1
|
|---|
| 112 | &and( $t, "0xcfcfcfcf" ); # 2
|
|---|
| 113 | &xor( $tmp2, $tmp2);
|
|---|
| 114 | &movb( &LB($tmp1), &LB($u) );
|
|---|
| 115 | &movb( &LB($tmp2), &HB($u) );
|
|---|
| 116 | &rotr( $t, 4 );
|
|---|
| 117 | &mov( $trans, &swtmp(1));
|
|---|
| 118 | &xor( $L, &DWP(" ",$trans,$tmp1,0));
|
|---|
| 119 | &movb( &LB($tmp1), &LB($t) );
|
|---|
| 120 | &xor( $L, &DWP("0x200",$trans,$tmp2,0));
|
|---|
| 121 | &movb( &LB($tmp2), &HB($t) );
|
|---|
| 122 | &shr( $u, 16);
|
|---|
| 123 | &xor( $L, &DWP("0x100",$trans,$tmp1,0));
|
|---|
| 124 | &movb( &LB($tmp1), &HB($u) );
|
|---|
| 125 | &shr( $t, 16);
|
|---|
| 126 | &xor( $L, &DWP("0x300",$trans,$tmp2,0));
|
|---|
| 127 | &movb( &LB($tmp2), &HB($t) );
|
|---|
| 128 | &and( $u, "0xff" );
|
|---|
| 129 | &and( $t, "0xff" );
|
|---|
| 130 | &mov( $tmp1, &DWP("0x600",$trans,$tmp1,0));
|
|---|
| 131 | &xor( $L, $tmp1);
|
|---|
| 132 | &mov( $tmp1, &DWP("0x700",$trans,$tmp2,0));
|
|---|
| 133 | &xor( $L, $tmp1);
|
|---|
| 134 | &mov( $tmp1, &DWP("0x400",$trans,$u,0));
|
|---|
| 135 | &xor( $L, $tmp1);
|
|---|
| 136 | &mov( $tmp1, &DWP("0x500",$trans,$t,0));
|
|---|
| 137 | &xor( $L, $tmp1);
|
|---|
| 138 | &mov( $trans, &wparam(1));
|
|---|
| 139 | }
|
|---|
| 140 |
|
|---|
| 141 | sub n2a
|
|---|
| 142 | {
|
|---|
| 143 | sprintf("%d",$_[0]);
|
|---|
| 144 | }
|
|---|
| 145 |
|
|---|
| 146 | # now has a side affect of rotating $a by $shift
|
|---|
| 147 | sub R_PERM_OP
|
|---|
| 148 | {
|
|---|
| 149 | local($a,$b,$tt,$shift,$mask,$last)=@_;
|
|---|
| 150 |
|
|---|
| 151 | &rotl( $a, $shift ) if ($shift != 0);
|
|---|
| 152 | &mov( $tt, $a );
|
|---|
| 153 | &xor( $a, $b );
|
|---|
| 154 | &and( $a, $mask );
|
|---|
| 155 | if ($notlast eq $b)
|
|---|
| 156 | {
|
|---|
| 157 | &xor( $b, $a );
|
|---|
| 158 | &xor( $tt, $a );
|
|---|
| 159 | }
|
|---|
| 160 | else
|
|---|
| 161 | {
|
|---|
| 162 | &xor( $tt, $a );
|
|---|
| 163 | &xor( $b, $a );
|
|---|
| 164 | }
|
|---|
| 165 | &comment("");
|
|---|
| 166 | }
|
|---|
| 167 |
|
|---|
| 168 | sub IP_new
|
|---|
| 169 | {
|
|---|
| 170 | local($l,$r,$tt,$lr)=@_;
|
|---|
| 171 |
|
|---|
| 172 | &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
|
|---|
| 173 | &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
|
|---|
| 174 | &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
|
|---|
| 175 | &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
|
|---|
| 176 | &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
|
|---|
| 177 |
|
|---|
| 178 | if ($lr != 3)
|
|---|
| 179 | {
|
|---|
| 180 | if (($lr-3) < 0)
|
|---|
| 181 | { &rotr($tt, 3-$lr); }
|
|---|
| 182 | else { &rotl($tt, $lr-3); }
|
|---|
| 183 | }
|
|---|
| 184 | if ($lr != 2)
|
|---|
| 185 | {
|
|---|
| 186 | if (($lr-2) < 0)
|
|---|
| 187 | { &rotr($r, 2-$lr); }
|
|---|
| 188 | else { &rotl($r, $lr-2); }
|
|---|
| 189 | }
|
|---|
| 190 | }
|
|---|
| 191 |
|
|---|
| 192 | sub FP_new
|
|---|
| 193 | {
|
|---|
| 194 | local($l,$r,$tt,$lr)=@_;
|
|---|
| 195 |
|
|---|
| 196 | if ($lr != 2)
|
|---|
| 197 | {
|
|---|
| 198 | if (($lr-2) < 0)
|
|---|
| 199 | { &rotl($r, 2-$lr); }
|
|---|
| 200 | else { &rotr($r, $lr-2); }
|
|---|
| 201 | }
|
|---|
| 202 | if ($lr != 3)
|
|---|
| 203 | {
|
|---|
| 204 | if (($lr-3) < 0)
|
|---|
| 205 | { &rotl($l, 3-$lr); }
|
|---|
| 206 | else { &rotr($l, $lr-3); }
|
|---|
| 207 | }
|
|---|
| 208 |
|
|---|
| 209 | &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
|
|---|
| 210 | &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
|
|---|
| 211 | &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
|
|---|
| 212 | &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
|
|---|
| 213 | &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
|
|---|
| 214 | &rotr($tt , 4);
|
|---|
| 215 | }
|
|---|
| 216 |
|
|---|
