crypt586.pl revision 109998
1118318Sdwmalone#!/usr/local/bin/perl 2118318Sdwmalone# 3118318Sdwmalone# The inner loop instruction sequence and the IP/FP modifications are from 4118318Sdwmalone# Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk> 5118318Sdwmalone# I've added the stuff needed for crypt() but I've not worried about making 6118318Sdwmalone# things perfect. 7118318Sdwmalone# 8118318Sdwmalone 9118318Sdwmalonepush(@INC,"perlasm","../../perlasm"); 10118318Sdwmalonerequire "x86asm.pl"; 11118318Sdwmalone 12118318Sdwmalone&asm_init($ARGV[0],"crypt586.pl"); 13118318Sdwmalone 14118318Sdwmalone$L="edi"; 15118318Sdwmalone$R="esi"; 16118318Sdwmalone 17118318Sdwmalone&external_label("DES_SPtrans"); 18118318Sdwmalone&fcrypt_body("fcrypt_body"); 19118318Sdwmalone&asm_finish(); 20118318Sdwmalone 21118318Sdwmalonesub fcrypt_body 22118318Sdwmalone { 23118318Sdwmalone local($name,$do_ip)=@_; 24118318Sdwmalone 25118318Sdwmalone &function_begin($name,"EXTRN _DES_SPtrans:DWORD"); 26118318Sdwmalone 27118318Sdwmalone &comment(""); 28118318Sdwmalone &comment("Load the 2 words"); 29118318Sdwmalone $trans="ebp"; 30118318Sdwmalone 31118318Sdwmalone &xor( $L, $L); 32118318Sdwmalone &xor( $R, $R); 33118318Sdwmalone 34118318Sdwmalone # PIC-ification:-) 35118318Sdwmalone if ($cpp) { &picmeup("edx","DES_SPtrans"); } 36118318Sdwmalone else { &lea("edx",&DWP("DES_SPtrans")); } 37118318Sdwmalone &push("edx"); # becomes &swtmp(1) 38118318Sdwmalone # 39118318Sdwmalone &mov($trans,&wparam(1)); # reloaded with DES_SPtrans in D_ENCRYPT 40118318Sdwmalone 41118318Sdwmalone &push(&DWC(25)); # add a variable 42118318Sdwmalone 43118318Sdwmalone &set_label("start"); 44118318Sdwmalone for ($i=0; $i<16; $i+=2) 45118318Sdwmalone { 46118318Sdwmalone &comment(""); 47118318Sdwmalone &comment("Round $i"); 48118318Sdwmalone &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx"); 49118318Sdwmalone 50118318Sdwmalone &comment(""); 51118318Sdwmalone &comment("Round ".sprintf("%d",$i+1)); 52118318Sdwmalone &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx"); 53118318Sdwmalone } 54118318Sdwmalone &mov("ebx", &swtmp(0)); 55118318Sdwmalone &mov("eax", $L); 56118318Sdwmalone &dec("ebx"); 57118318Sdwmalone &mov($L, $R); 58118318Sdwmalone &mov($R, "eax"); 59118318Sdwmalone &mov(&swtmp(0), "ebx"); 60118318Sdwmalone &jnz(&label("start")); 61118318Sdwmalone 62118318Sdwmalone &comment(""); 63158160Sbde &comment("FP"); 64158160Sbde &mov("edx",&wparam(0)); 65158160Sbde 66158160Sbde &FP_new($R,$L,"eax",3); 67158160Sbde &mov(&DWP(0,"edx","",0),"eax"); 68158160Sbde &mov(&DWP(4,"edx","",0),$L); 69158160Sbde 70158160Sbde &add("esp",8); # remove variables 71158160Sbde 72158160Sbde &function_end($name); 73158160Sbde } 74158160Sbde 75158160Sbdesub D_ENCRYPT 76158160Sbde { 77158160Sbde local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t)=@_; 78228992Suqs 79158160Sbde &mov( $u, &wparam(2)); # 2 80158160Sbde &mov( $t, $R); 81118318Sdwmalone &shr( $t, 16); # 1 82118318Sdwmalone &mov( $tmp2, &wparam(3)); # 2 83118318Sdwmalone &xor( $t, $R); # 1 84118318Sdwmalone 85118318Sdwmalone &and( $u, $t); # 2 86118318Sdwmalone &and( $t, $tmp2); # 2 87118318Sdwmalone 88118318Sdwmalone &mov( $tmp1, $u); 89158160Sbde &shl( $tmp1, 16); # 1 90118318Sdwmalone &mov( $tmp2, $t); 91118318Sdwmalone &shl( $tmp2, 16); # 1 92118318Sdwmalone &xor( $u, $tmp1); # 2 93175387Sdelphij &xor( $t, $tmp2); # 2 94118318Sdwmalone &mov( $tmp1, &DWP(&n2a($S*4),$trans,"",0)); # 2 95118318Sdwmalone &xor( $u, $tmp1); 96118318Sdwmalone &mov( $tmp2, &DWP(&n2a(($S+1)*4),$trans,"",0)); # 2 97118318Sdwmalone &xor( $u, $R); 98118318Sdwmalone &xor( $t, $R); 99118318Sdwmalone &xor( $t, $tmp2); 100118318Sdwmalone 101118318Sdwmalone &and( $u, "0xfcfcfcfc" ); # 2 102118318Sdwmalone &xor( $tmp1, $tmp1); # 1 103118318Sdwmalone &and( $t, "0xcfcfcfcf" ); # 2 104118318Sdwmalone &xor( $tmp2, $tmp2); 105118318Sdwmalone &movb( &LB($tmp1), &LB($u) ); 106118318Sdwmalone &movb( &LB($tmp2), &HB($u) ); 107118318Sdwmalone &rotr( $t, 4 ); 108158160Sbde &mov( $trans, &swtmp(1)); 109158160Sbde &xor( $L, &DWP(" ",$trans,$tmp1,0)); 110158160Sbde &movb( &LB($tmp1), &LB($t) ); 111158160Sbde &xor( $L, &DWP("0x200",$trans,$tmp2,0)); 112158160Sbde &movb( &LB($tmp2), &HB($t) ); 113158160Sbde &shr( $u, 16); 114118318Sdwmalone &xor( $L, &DWP("0x100",$trans,$tmp1,0)); 115158160Sbde &movb( &LB($tmp1), &HB($u) ); 116118318Sdwmalone &shr( $t, 16); 117158160Sbde &xor( $L, &DWP("0x300",$trans,$tmp2,0)); 118158160Sbde &movb( &LB($tmp2), &HB($t) ); 119158160Sbde &and( $u, "0xff" ); 120158160Sbde &and( $t, "0xff" ); 121158160Sbde &mov( $tmp1, &DWP("0x600",$trans,$tmp1,0)); 122158160Sbde &xor( $L, $tmp1); 123158160Sbde &mov( $tmp1, &DWP("0x700",$trans,$tmp2,0)); 124228992Suqs &xor( $L, $tmp1); 125158160Sbde &mov( $tmp1, &DWP("0x400",$trans,$u,0)); 126118318Sdwmalone &xor( $L, $tmp1); 127118318Sdwmalone &mov( $tmp1, &DWP("0x500",$trans,$t,0)); 128118318Sdwmalone &xor( $L, $tmp1); 129118318Sdwmalone &mov( $trans, &wparam(1)); 130118318Sdwmalone } 131118318Sdwmalone 132118318Sdwmalonesub n2a 133118318Sdwmalone { 134118318Sdwmalone sprintf("%d",$_[0]); 135118318Sdwmalone } 136118318Sdwmalone 137118318Sdwmalone# now has a side affect of rotating $a by $shift 138118318Sdwmalonesub R_PERM_OP 139118318Sdwmalone { 140240605Smelifaro local($a,$b,$tt,$shift,$mask,$last)=@_; 141118318Sdwmalone 142118318Sdwmalone &rotl( $a, $shift ) if ($shift != 0); 143118318Sdwmalone &mov( $tt, $a ); 144118318Sdwmalone &xor( $a, $b ); 145118318Sdwmalone &and( $a, $mask ); 146118318Sdwmalone if ($notlast eq $b) 147118318Sdwmalone { 148118318Sdwmalone &xor( $b, $a ); 149118318Sdwmalone &xor( $tt, $a ); 150118318Sdwmalone } 151118318Sdwmalone else 152118318Sdwmalone { 153118318Sdwmalone &xor( $tt, $a ); 154118318Sdwmalone &xor( $b, $a ); 155118318Sdwmalone } 156118318Sdwmalone &comment(""); 157118318Sdwmalone } 158118318Sdwmalone 159118318Sdwmalonesub IP_new 160118318Sdwmalone { 161118318Sdwmalone local($l,$r,$tt,$lr)=@_; 162118318Sdwmalone 163118318Sdwmalone &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l); 164118318Sdwmalone &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l); 165118318Sdwmalone &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r); 166118318Sdwmalone &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r); 167118318Sdwmalone &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r); 168118318Sdwmalone 169158161Sbde if ($lr != 3) 170118318Sdwmalone { 171118318Sdwmalone if (($lr-3) < 0) 172118318Sdwmalone { &rotr($tt, 3-$lr); } 173118318Sdwmalone else { &rotl($tt, $lr-3); } 174118318Sdwmalone } 175118318Sdwmalone if ($lr != 2) 176118318Sdwmalone { 177118318Sdwmalone if (($lr-2) < 0) 178118318Sdwmalone { &rotr($r, 2-$lr); } 179118318Sdwmalone else { &rotl($r, $lr-2); } 180118318Sdwmalone } 181118318Sdwmalone } 182118318Sdwmalone 183158161Sbdesub FP_new 184118318Sdwmalone { 185158160Sbde local($l,$r,$tt,$lr)=@_; 186158160Sbde 187118318Sdwmalone if ($lr != 2) 188118318Sdwmalone { 189118318Sdwmalone if (($lr-2) < 0) 190118318Sdwmalone { &rotl($r, 2-$lr); } 191158160Sbde else { &rotr($r, $lr-2); } 192158160Sbde } 193158160Sbde if ($lr != 3) 194158160Sbde { 195158160Sbde if (($lr-3) < 0) 196158160Sbde { &rotl($l, 3-$lr); } 197158160Sbde else { &rotr($l, $lr-3); } 198158160Sbde } 199118318Sdwmalone 200118318Sdwmalone &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r); 201158160Sbde &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r); 202158160Sbde &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l); 203158160Sbde &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l); 204158160Sbde &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r); 205158160Sbde &rotr($tt , 4); 206158160Sbde } 207158160Sbde 208158160Sbde