| 1 | #! /usr/bin/env perl
|
|---|
| 2 | # Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
|
|---|
| 3 | #
|
|---|
| 4 | # Licensed under the OpenSSL license (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 |
|
|---|
| 10 | $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
|
|---|
| 11 | push(@INC,"${dir}","${dir}../../perlasm");
|
|---|
| 12 | require "x86asm.pl";
|
|---|
| 13 | require "cbc.pl";
|
|---|
| 14 |
|
|---|
| 15 | $output = pop;
|
|---|
| 16 | open STDOUT,">$output";
|
|---|
| 17 |
|
|---|
| 18 | &asm_init($ARGV[0],$ARGV[$#ARGV] eq "386");
|
|---|
| 19 |
|
|---|
| 20 | $BF_ROUNDS=16;
|
|---|
| 21 | $BF_OFF=($BF_ROUNDS+2)*4;
|
|---|
| 22 | $L="edi";
|
|---|
| 23 | $R="esi";
|
|---|
| 24 | $P="ebp";
|
|---|
| 25 | $tmp1="eax";
|
|---|
| 26 | $tmp2="ebx";
|
|---|
| 27 | $tmp3="ecx";
|
|---|
| 28 | $tmp4="edx";
|
|---|
| 29 |
|
|---|
| 30 | &BF_encrypt("BF_encrypt",1);
|
|---|
| 31 | &BF_encrypt("BF_decrypt",0);
|
|---|
| 32 | &cbc("BF_cbc_encrypt","BF_encrypt","BF_decrypt",1,4,5,3,-1,-1);
|
|---|
| 33 | &asm_finish();
|
|---|
| 34 |
|
|---|
| 35 | close STDOUT or die "error closing STDOUT: $!";
|
|---|
| 36 |
|
|---|
| 37 | sub BF_encrypt
|
|---|
| 38 | {
|
|---|
| 39 | local($name,$enc)=@_;
|
|---|
| 40 |
|
|---|
| 41 | &function_begin_B($name,"");
|
|---|
| 42 |
|
|---|
| 43 | &comment("");
|
|---|
| 44 |
|
|---|
| 45 | &push("ebp");
|
|---|
| 46 | &push("ebx");
|
|---|
| 47 | &mov($tmp2,&wparam(0));
|
|---|
| 48 | &mov($P,&wparam(1));
|
|---|
| 49 | &push("esi");
|
|---|
| 50 | &push("edi");
|
|---|
| 51 |
|
|---|
| 52 | &comment("Load the 2 words");
|
|---|
| 53 | &mov($L,&DWP(0,$tmp2,"",0));
|
|---|
| 54 | &mov($R,&DWP(4,$tmp2,"",0));
|
|---|
| 55 |
|
|---|
| 56 | &xor( $tmp1, $tmp1);
|
|---|
| 57 |
|
|---|
| 58 | # encrypting part
|
|---|
| 59 |
|
|---|
| 60 | if ($enc)
|
|---|
| 61 | {
|
|---|
| 62 | &mov($tmp2,&DWP(0,$P,"",0));
|
|---|
| 63 | &xor( $tmp3, $tmp3);
|
|---|
| 64 |
|
|---|
| 65 | &xor($L,$tmp2);
|
|---|
| 66 | for ($i=0; $i<$BF_ROUNDS; $i+=2)
|
|---|
| 67 | {
|
|---|
| 68 | &comment("");
|
|---|
| 69 | &comment("Round $i");
|
|---|
| 70 | &BF_ENCRYPT($i+1,$R,$L,$P,$tmp1,$tmp2,$tmp3,$tmp4,1);
|
|---|
| 71 |
|
|---|
| 72 | &comment("");
|
|---|
| 73 | &comment("Round ".sprintf("%d",$i+1));
|
|---|
| 74 | &BF_ENCRYPT($i+2,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,1);
|
|---|
| 75 | }
|
|---|
| 76 | # &mov($tmp1,&wparam(0)); In last loop
|
|---|
| 77 | &mov($tmp4,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
|
|---|
| 78 | }
|
|---|
| 79 | else
|
|---|
| 80 | {
|
|---|
| 81 | &mov($tmp2,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
|
|---|
| 82 | &xor( $tmp3, $tmp3);
|
|---|
| 83 |
|
|---|
| 84 | &xor($L,$tmp2);
|
|---|
| 85 | for ($i=$BF_ROUNDS; $i>0; $i-=2)
|
|---|
| 86 | {
|
|---|
| 87 | &comment("");
|
|---|
| 88 | &comment("Round $i");
|
|---|
| 89 | &BF_ENCRYPT($i,$R,$L,$P,$tmp1,$tmp2,$tmp3,$tmp4,0);
|
|---|
| 90 | &comment("");
|
|---|
| 91 | &comment("Round ".sprintf("%d",$i-1));
|
|---|
| 92 | &BF_ENCRYPT($i-1,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,0);
|
|---|
| 93 | }
|
|---|
| 94 | # &mov($tmp1,&wparam(0)); In last loop
|
|---|
| 95 | &mov($tmp4,&DWP(0,$P,"",0));
|
|---|
| 96 | }
|
|---|
| 97 |
|
|---|
| 98 | &xor($R,$tmp4);
|
|---|
| 99 | &mov(&DWP(4,$tmp1,"",0),$L);
|
|---|
| 100 |
|
|---|
| 101 | &mov(&DWP(0,$tmp1,"",0),$R);
|
|---|
| 102 | &function_end($name);
|
|---|
| 103 | }
|
|---|
| 104 |
|
|---|
| 105 | sub BF_ENCRYPT
|
|---|
| 106 | {
|
|---|
| 107 | local($i,$L,$R,$P,$tmp1,$tmp2,$tmp3,$tmp4,$enc)=@_;
|
|---|
| 108 |
|
|---|
| 109 | &mov( $tmp4, &DWP(&n2a($i*4),$P,"",0)); # for next round
|
|---|
| 110 |
|
|---|
| 111 | &mov( $tmp2, $R);
|
|---|
| 112 | &xor( $L, $tmp4);
|
|---|
| 113 |
|
|---|
| 114 | &shr( $tmp2, 16);
|
|---|
| 115 | &mov( $tmp4, $R);
|
|---|
| 116 |
|
|---|
| 117 | &movb( &LB($tmp1), &HB($tmp2)); # A
|
|---|
| 118 | &and( $tmp2, 0xff); # B
|
|---|
| 119 |
|
|---|
| 120 | &movb( &LB($tmp3), &HB($tmp4)); # C
|
|---|
| 121 | &and( $tmp4, 0xff); # D
|
|---|
| 122 |
|
|---|
| 123 | &mov( $tmp1, &DWP(&n2a($BF_OFF+0x0000),$P,$tmp1,4));
|
|---|
| 124 | &mov( $tmp2, &DWP(&n2a($BF_OFF+0x0400),$P,$tmp2,4));
|
|---|
| 125 |
|
|---|
| 126 | &add( $tmp2, $tmp1);
|
|---|
| 127 | &mov( $tmp1, &DWP(&n2a($BF_OFF+0x0800),$P,$tmp3,4));
|
|---|
| 128 |
|
|---|
| 129 | &xor( $tmp2, $tmp1);
|
|---|
| 130 | &mov( $tmp4, &DWP(&n2a($BF_OFF+0x0C00),$P,$tmp4,4));
|
|---|
| 131 |
|
|---|
| 132 | &add( $tmp2, $tmp4);
|
|---|
| 133 | if (($enc && ($i != 16)) || ((!$enc) && ($i != 1)))
|
|---|
| 134 | { &xor( $tmp1, $tmp1); }
|
|---|
| 135 | else
|
|---|
| 136 | {
|
|---|
| 137 | &comment("Load parameter 0 ($i) enc=$enc");
|
|---|
| 138 | &mov($tmp1,&wparam(0));
|
|---|
| 139 | } # In last loop
|
|---|
| 140 |
|
|---|
| 141 | &xor( $L, $tmp2);
|
|---|
| 142 | # delay
|
|---|
| 143 | }
|
|---|
| 144 |
|
|---|
| 145 | sub n2a
|
|---|
| 146 | {
|
|---|
| 147 | sprintf("%d",$_[0]);
|
|---|
| 148 | }
|
|---|
| 149 |
|
|---|
