diff options
Diffstat (limited to 'crypto/des/asm/des-som3.pl')
| -rw-r--r-- | crypto/des/asm/des-som3.pl | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/crypto/des/asm/des-som3.pl b/crypto/des/asm/des-som3.pl new file mode 100644 index 0000000000..3f353955da --- /dev/null +++ b/crypto/des/asm/des-som3.pl @@ -0,0 +1,266 @@ +#!/usr/local/bin/perl +#
+# The inner loop instruction sequence and the IP/FP modifications are from
+# Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk>
+#
+
+$prog="des-som3.pl";
+
+# base code is in microsft
+# op dest, source
+# format.
+#
+
+require "desboth.pl";
+
+if ( ($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 $prog");
+&comment("Which is a perl program used to generate the x86 assember for");
+&comment("any of elf, a.out, Win32, or Solaris");
+&comment("It can be found in SSLeay 0.6.5+ or in libdes 3.26+");
+&comment("eric <eay\@cryptsoft.com>");
+&comment("The inner loop instruction sequence and the IP/FP modifications");
+&comment("are from Svend Olaf Mikkelsen <svolaf\@inet.uni-c.dk>");
+
+&comment("");
+
+&file("dx86xxxx");
+
+$L="edi";
+$R="esi";
+
+&des_encrypt("des_encrypt",1);
+&des_encrypt("des_encrypt2",0);
+
+&des_encrypt3("des_encrypt3",1);
+&des_encrypt3("des_decrypt3",0);
+
+&file_end();
+
+sub des_encrypt
+ {
+ local($name,$do_ip)=@_;
+
+ &function_begin($name,3,EXTRN _des_SPtrans:DWORD");
+
+ &comment("");
+ &comment("Load the 2 words");
+ $ks="ebp";
+
+ if ($do_ip)
+ {
+ &mov($R,&wparam(0));
+ &xor( "ecx", "ecx" );
+ &mov("eax",&DWP(0,$R,"",0));
+ &mov("ebx",&wparam(2)); # get encrypt flag
+ &mov($L,&DWP(4,$R,"",0));
+ &comment("");
+ &comment("IP");
+ &IP_new("eax",$L,$R,3);
+ }
+ else
+ {
+ &mov("eax",&wparam(0));
+ &xor( "ecx", "ecx" );
+ &mov($R,&DWP(0,"eax","",0));
+ &mov("ebx",&wparam(2)); # get encrypt flag
+ &rotl($R,3);
+ &mov($L,&DWP(4,"eax","",0));
+ &rotl($L,3);
+ }
+
+ &cmp("ebx","0");
+ &mov( $ks, &wparam(1) );
+ &je(&label("start_decrypt"));
+
+ for ($i=0; $i<16; $i+=2)
+ {
+ &comment("");
+ &comment("Round $i");
+ &D_ENCRYPT($i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
+
+ &comment("");
+ &comment("Round ".sprintf("%d",$i+1));
+ &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
+ }
+ &jmp(&label("end"));
+
+ &set_label("start_decrypt");
+
+ for ($i=15; $i>0; $i-=2)
+ {
+ &comment("");
+ &comment("Round $i");
+ &D_ENCRYPT(15-$i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
+ &comment("");
+ &comment("Round ".sprintf("%d",$i-1));
+ &D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
+ }
+
+ &set_label("end");
+
+ if ($do_ip)
+ {
+ &comment("");
+ &comment("FP");
+ &mov("edx",&wparam(0));
+ &FP_new($L,$R,"eax",3);
+
+ &mov(&DWP(0,"edx","",0),"eax");
+ &mov(&DWP(4,"edx","",0),$R);
+ }
+ else
+ {
+ &comment("");
+ &comment("Fixup");
+ &rotr($L,3); # r
+ &mov("eax",&wparam(0));
+ &rotr($R,3); # l
+ &mov(&DWP(0,"eax","",0),$L);
+ &mov(&DWP(4,"eax","",0),$R);
+ }
+
+
+ &function_end($name);
+ }
+
+sub D_ENCRYPT
+ {
+ local($r,$L,$R,$S,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_;
+
+ &mov( $u, &DWP(&n2a($S*4),$ks,"",0));
+ &xor( $tmp1, $tmp1);
+ &mov( $t, &DWP(&n2a(($S+1)*4),$ks,"",0));
+ &xor( $u, $R);
+ &xor( $t, $R);
+ &and( $u, "0xfcfcfcfc" );
+ &and( $t, "0xcfcfcfcf" );
+ &movb( &LB($tmp1), &LB($u) );
+ &movb( &LB($tmp2), &HB($u) );
+ &rotr( $t, 4 );
+ &mov( $ks, &DWP(" $desSP",$tmp1,"",0));
+ &movb( &LB($tmp1), &LB($t) );
+ &xor( $L, $ks);
+ &mov( $ks, &DWP("0x200+$desSP",$tmp2,"",0));
+ &xor( $L, $ks); ######
+ &movb( &LB($tmp2), &HB($t) );
+ &shr( $u, 16);
+ &mov( $ks, &DWP("0x100+$desSP",$tmp1,"",0));
+ &xor( $L, $ks); ######
+ &movb( &LB($tmp1), &HB($u) );
+ &shr( $t, 16);
+ &mov( $ks, &DWP("0x300+$desSP",$tmp2,"",0));
+ &xor( $L, $ks);
+ &mov( $ks, &DWP(24,"esp","",0)); ####
+ &movb( &LB($tmp2), &HB($t) );
+ &and( $u, "0xff" );
+ &and( $t, "0xff" );
+ &mov( $tmp1, &DWP("0x600+$desSP",$tmp1,"",0));
+ &xor( $L, $tmp1);
+ &mov( $tmp1, &DWP("0x700+$desSP",$tmp2,"",0));
+ &xor( $L, $tmp1);
+ &mov( $tmp1, &DWP("0x400+$desSP",$u,"",0));
+ &xor( $L, $tmp1);
+ &mov( $tmp1, &DWP("0x500+$desSP",$t,"",0));
+ &xor( $L, $tmp1);
+ }
+
+sub n2a
+ {
+ sprintf("%d",$_[0]);
+ }
+
+# now has a side affect of rotating $a by $shift
+sub R_PERM_OP
+ {
+ local($a,$b,$tt,$shift,$mask,$last)=@_;
+
+ &rotl( $a, $shift ) if ($shift != 0);
+ &mov( $tt, $a );
+ &xor( $a, $b );
+ &and( $a, $mask );
+ if ($notlast eq $b)
+ {
+ &xor( $b, $a );
+ &xor( $tt, $a );
+ }
+ else
+ {
+ &xor( $tt, $a );
+ &xor( $b, $a );
+ }
+ &comment("");
+ }
+
+sub IP_new
+ {
+ local($l,$r,$tt,$lr)=@_;
+
+ &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
+ &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
+ &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
+ &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
+ &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
+
+ if ($lr != 3)
+ {
+ if (($lr-3) < 0)
+ { &rotr($tt, 3-$lr); }
+ else { &rotl($tt, $lr-3); }
+ }
+ if ($lr != 2)
+ {
+ if (($lr-2) < 0)
+ { &rotr($r, 2-$lr); }
+ else { &rotl($r, $lr-2); }
+ }
+ }
+
+sub FP_new
+ {
+ local($l,$r,$tt,$lr)=@_;
+
+ if ($lr != 2)
+ {
+ if (($lr-2) < 0)
+ { &rotl($r, 2-$lr); }
+ else { &rotr($r, $lr-2); }
+ }
+ if ($lr != 3)
+ {
+ if (($lr-3) < 0)
+ { &rotl($l, 3-$lr); }
+ else { &rotr($l, $lr-3); }
+ }
+
+ &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
+ &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
+ &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
+ &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
+ &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
+ &rotr($tt , 4);
+ }
+
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