diff options
Diffstat (limited to 'crypto/bf/asm/bf586.pl')
| -rw-r--r-- | crypto/bf/asm/bf586.pl | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/crypto/bf/asm/bf586.pl b/crypto/bf/asm/bf586.pl new file mode 100644 index 0000000000..bcb53cf3f5 --- /dev/null +++ b/crypto/bf/asm/bf586.pl @@ -0,0 +1,159 @@ +#!/usr/local/bin/perl +#!/usr/local/bin/perl
+
+$prog="bf586.pl";
+
+# base code is in microsft
+# op dest, source
+# format.
+#
+
+if ( ($ARGV[0] eq "elf"))
+ { require "x86unix.pl"; }
+elsif ( ($ARGV[0] eq "a.out"))
+ { $aout=1; require "x86unix.pl"; }
+elsif ( ($ARGV[0] eq "sol"))
+ { $sol=1; require "x86unix.pl"; }
+elsif ( ($ARGV[0] eq "cpp"))
+ { $cpp=1; require "x86unix.pl"; }
+elsif ( ($ARGV[0] eq "win32"))
+ { require "x86ms.pl"; }
+else
+ {
+ print STDERR <<"EOF";
+Pick one target type from
+ elf - linux, FreeBSD etc
+ a.out - old linux
+ sol - x86 solaris
+ cpp - format so x86unix.cpp can be used
+ win32 - Windows 95/Windows NT
+EOF
+ exit(1);
+ }
+
+&comment("Don't even think of reading this code");
+&comment("It was automatically generated by $prog");
+&comment("Which is a perl program used to generate the x86 assember for");
+&comment("any of elf, a.out, Win32, or Solaris");
+&comment("It can be found in SSLeay 0.7.0+");
+&comment("eric <eay\@cryptsoft.com>");
+&comment("");
+
+&file("bfx86xxxx");
+
+$BF_ROUNDS=16;
+$BF_OFF=($BF_ROUNDS+2)*4;
+$L="ecx";
+$R="edx";
+$P="edi";
+$tot="esi";
+$tmp1="eax";
+$tmp2="ebx";
+$tmp3="ebp";
+
+&des_encrypt("BF_encrypt");
+
+&file_end();
+
+sub des_encrypt
+ {
+ local($name)=@_;
+
+ &function_begin($name,3,"");
+
+ &comment("");
+ &comment("Load the 2 words");
+ &mov("eax",&wparam(0));
+ &mov($L,&DWP(0,"eax","",0));
+ &mov($R,&DWP(4,"eax","",0));
+
+ &comment("");
+ &comment("P pointer, s and enc flag");
+ &mov($P,&wparam(1));
+
+ &xor( $tmp1, $tmp1);
+ &xor( $tmp2, $tmp2);
+
+ # encrypting part
+
+ &mov("ebp",&wparam(2)); # get encrypt flag
+ &cmp("ebp","0");
+ &je(&label("start_decrypt"));
+
+ &xor($L,&DWP(0,$P,"",0));
+ for ($i=0; $i<$BF_ROUNDS; $i+=2)
+ {
+ &comment("");
+ &comment("Round $i");
+ &BF_ENCRYPT($i+1,$R,$L,$P,$tot,$tmp1,$tmp2,$tmp3);
+
+ &comment("");
+ &comment("Round ".sprintf("%d",$i+1));
+ &BF_ENCRYPT($i+2,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3);
+ }
+ &xor($R,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
+
+ &mov("eax",&wparam(0));
+ &mov(&DWP(0,"eax","",0),$R);
+ &mov(&DWP(4,"eax","",0),$L);
+ &function_end_A($name);
+
+ &set_label("start_decrypt");
+
+ &xor($L,&DWP(($BF_ROUNDS+1)*4,$P,"",0));
+ for ($i=$BF_ROUNDS; $i>0; $i-=2)
+ {
+ &comment("");
+ &comment("Round $i");
+ &BF_ENCRYPT($i,$R,$L,$P,$tot,$tmp1,$tmp2,$tmp3);
+ &comment("");
+ &comment("Round ".sprintf("%d",$i-1));
+ &BF_ENCRYPT($i-1,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3);
+ }
+ &xor($R,&DWP(0,$P,"",0));
+
+ &mov("eax",&wparam(0));
+ &mov(&DWP(0,"eax","",0),$R);
+ &mov(&DWP(4,"eax","",0),$L);
+ &function_end_A($name);
+
+ &function_end_B($name);
+ }
+
+sub BF_ENCRYPT
+ {
+ local($i,$L,$R,$P,$tot,$tmp1,$tmp2,$tmp3)=@_;
+
+ &rotr( $R, 16);
+ &mov( $tot, &DWP(&n2a($i*4),$P,"",0));
+
+ &movb( &LB($tmp1), &HB($R));
+ &movb( &LB($tmp2), &LB($R));
+
+ &rotr( $R, 16);
+ &xor( $L, $tot);
+
+ &mov( $tot, &DWP(&n2a($BF_OFF+0x0000),$P,$tmp1,4));
+ &mov( $tmp3, &DWP(&n2a($BF_OFF+0x0400),$P,$tmp2,4));
+
+ &movb( &LB($tmp1), &HB($R));
+ &movb( &LB($tmp2), &LB($R));
+
+ &add( $tot, $tmp3);
+ &mov( $tmp1, &DWP(&n2a($BF_OFF+0x0800),$P,$tmp1,4)); # delay
+
+ &xor( $tot, $tmp1);
+ &mov( $tmp3, &DWP(&n2a($BF_OFF+0x0C00),$P,$tmp2,4));
+
+ &add( $tot, $tmp3);
+ &xor( $tmp1, $tmp1);
+
+ &xor( $L, $tot);
+ # delay
+ }
+
+sub n2a
+ {
+ sprintf("%d",$_[0]);
+ }
+
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