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159 lines
3.1 KiB
159 lines
3.1 KiB
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#!/usr/local/bin/perl |
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$prog="bf586.pl"; |
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# base code is in microsft |
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# op dest, source |
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# format. |
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# |
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if ( ($ARGV[0] eq "elf")) |
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{ require "x86unix.pl"; } |
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elsif ( ($ARGV[0] eq "a.out")) |
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{ $aout=1; require "x86unix.pl"; } |
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elsif ( ($ARGV[0] eq "sol")) |
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{ $sol=1; require "x86unix.pl"; } |
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elsif ( ($ARGV[0] eq "cpp")) |
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{ $cpp=1; require "x86unix.pl"; } |
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elsif ( ($ARGV[0] eq "win32")) |
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{ require "x86ms.pl"; } |
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else |
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{ |
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print STDERR <<"EOF"; |
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Pick one target type from |
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elf - linux, FreeBSD etc |
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a.out - old linux |
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sol - x86 solaris |
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cpp - format so x86unix.cpp can be used |
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win32 - Windows 95/Windows NT |
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EOF |
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exit(1); |
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} |
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&comment("Don't even think of reading this code"); |
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&comment("It was automatically generated by $prog"); |
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&comment("Which is a perl program used to generate the x86 assember for"); |
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&comment("any of elf, a.out, Win32, or Solaris"); |
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&comment("It can be found in SSLeay 0.7.0+"); |
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&comment("eric <eay\@mincom.oz.au>"); |
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&comment(""); |
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&file("bfx86xxxx"); |
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$BF_ROUNDS=16; |
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$BF_OFF=($BF_ROUNDS+2)*4; |
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$L="ecx"; |
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$R="edx"; |
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$P="edi"; |
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$tot="esi"; |
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$tmp1="eax"; |
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$tmp2="ebx"; |
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$tmp3="ebp"; |
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&des_encrypt("BF_encrypt"); |
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&file_end(); |
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sub des_encrypt |
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{ |
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local($name)=@_; |
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&function_begin($name,3); |
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&comment(""); |
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&comment("Load the 2 words"); |
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&mov("eax",&wparam(0)); |
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&mov($L,&DWP(0,"eax","",0)); |
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&mov($R,&DWP(4,"eax","",0)); |
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&comment(""); |
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&comment("P pointer, s and enc flag"); |
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&mov($P,&wparam(1)); |
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&xor( $tmp1, $tmp1); |
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&xor( $tmp2, $tmp2); |
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# encrypting part |
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&mov("ebp",&wparam(2)); # get encrypt flag |
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&cmp("ebp","0"); |
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&je(&label("start_decrypt")); |
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&xor($L,&DWP(0,$P,"",0)); |
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for ($i=0; $i<$BF_ROUNDS; $i+=2) |
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{ |
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&comment(""); |
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&comment("Round $i"); |
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&BF_ENCRYPT($i+1,$R,$L,$P,$tot,$tmp1,$tmp2,$tmp3); |
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&comment(""); |
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&comment("Round ".sprintf("%d",$i+1)); |
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&BF_ENCRYPT($i+2,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3); |
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} |
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&xor($R,&DWP(($BF_ROUNDS+1)*4,$P,"",0)); |
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&mov("eax",&wparam(0)); |
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&mov(&DWP(0,"eax","",0),$R); |
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&mov(&DWP(4,"eax","",0),$L); |
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&function_end_A($name); |
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&set_label("start_decrypt"); |
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&xor($L,&DWP(($BF_ROUNDS+1)*4,$P,"",0)); |
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for ($i=$BF_ROUNDS; $i>0; $i-=2) |
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{ |
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&comment(""); |
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&comment("Round $i"); |
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&BF_ENCRYPT($i,$R,$L,$P,$tot,$tmp1,$tmp2,$tmp3); |
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&comment(""); |
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&comment("Round ".sprintf("%d",$i-1)); |
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&BF_ENCRYPT($i-1,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3); |
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} |
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&xor($R,&DWP(0,$P,"",0)); |
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&mov("eax",&wparam(0)); |
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&mov(&DWP(0,"eax","",0),$R); |
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&mov(&DWP(4,"eax","",0),$L); |
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&function_end_A($name); |
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&function_end_B($name); |
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} |
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sub BF_ENCRYPT |
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{ |
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local($i,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3)=@_; |
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&rotr( $R, 16); |
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&mov( $tot, &DWP(&n2a($i*4),$P,"",0)); |
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&movb( &LB($tmp1), &HB($R)); |
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&movb( &LB($tmp2), &LB($R)); |
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&rotr( $R, 16); |
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&xor( $L, $tot); |
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&mov( $tot, &DWP(&n2a($BF_OFF+0x0000),$P,$tmp1,4)); |
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&mov( $tmp3, &DWP(&n2a($BF_OFF+0x0400),$P,$tmp2,4)); |
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&movb( &LB($tmp1), &HB($R)); |
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&movb( &LB($tmp2), &LB($R)); |
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&add( $tot, $tmp3); |
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&mov( $tmp1, &DWP(&n2a($BF_OFF+0x0800),$P,$tmp1,4)); # delay |
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&xor( $tot, $tmp1); |
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&mov( $tmp3, &DWP(&n2a($BF_OFF+0x0C00),$P,$tmp2,4)); |
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&add( $tot, $tmp3); |
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&xor( $tmp1, $tmp1); |
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&xor( $L, $tot); |
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# delay |
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} |
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sub n2a |
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{ |
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sprintf("%d",$_[0]); |
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} |
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