diff options
Diffstat (limited to '3rdparty/des-4.04b/asm/crypt586.pl')
| -rw-r--r-- | 3rdparty/des-4.04b/asm/crypt586.pl | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/3rdparty/des-4.04b/asm/crypt586.pl b/3rdparty/des-4.04b/asm/crypt586.pl new file mode 100644 index 0000000..b310d92 --- /dev/null +++ b/3rdparty/des-4.04b/asm/crypt586.pl @@ -0,0 +1,204 @@ +#!/usr/local/bin/perl +# +# The inner loop instruction sequence and the IP/FP modifications are from +# Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk> +# I've added the stuff needed for crypt() but I've not worried about making +# things perfect. +# + +push(@INC,"perlasm","../../perlasm"); +require "x86asm.pl"; + +&asm_init($ARGV[0],"crypt586.pl"); + +$L="edi"; +$R="esi"; + +&external_label("des_SPtrans"); +&fcrypt_body("fcrypt_body"); +&asm_finish(); + +sub fcrypt_body + { + local($name,$do_ip)=@_; + + &function_begin($name,"EXTRN _des_SPtrans:DWORD"); + + &comment(""); + &comment("Load the 2 words"); + $ks="ebp"; + + &xor( $L, $L); + &xor( $R, $R); + &mov($ks,&wparam(1)); + + &push(25); # add a variable + + &set_label("start"); + 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"); + } + &mov("ebx", &swtmp(0)); + &mov("eax", $L); + &dec("ebx"); + &mov($L, $R); + &mov($R, "eax"); + &mov(&swtmp(0), "ebx"); + &jnz(&label("start")); + + &comment(""); + &comment("FP"); + &mov("edx",&wparam(0)); + + &FP_new($R,$L,"eax",3); + &mov(&DWP(0,"edx","",0),"eax"); + &mov(&DWP(4,"edx","",0),$L); + + &pop("ecx"); # remove variable + + &function_end($name); + } + +sub D_ENCRYPT + { + local($r,$L,$R,$S,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_; + + &mov( $u, &wparam(2)); # 2 + &mov( $t, $R); + &shr( $t, 16); # 1 + &mov( $tmp2, &wparam(3)); # 2 + &xor( $t, $R); # 1 + + &and( $u, $t); # 2 + &and( $t, $tmp2); # 2 + + &mov( $tmp1, $u); + &shl( $tmp1, 16); # 1 + &mov( $tmp2, $t); + &shl( $tmp2, 16); # 1 + &xor( $u, $tmp1); # 2 + &xor( $t, $tmp2); # 2 + &mov( $tmp1, &DWP(&n2a($S*4),$ks,"",0)); # 2 + &xor( $u, $tmp1); + &mov( $tmp2, &DWP(&n2a(($S+1)*4),$ks,"",0)); # 2 + &xor( $u, $R); + &xor( $t, $R); + &xor( $t, $tmp2); + + &and( $u, "0xfcfcfcfc" ); # 2 + &xor( $tmp1, $tmp1); # 1 + &and( $t, "0xcfcfcfcf" ); # 2 + &xor( $tmp2, $tmp2); + &movb( &LB($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( $ks, &wparam(1)); + &movb( &LB($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); + } + |