1*0Sstevel@tonic-gate#!/usr/local/bin/perl 2*0Sstevel@tonic-gate# 3*0Sstevel@tonic-gate# The inner loop instruction sequence and the IP/FP modifications are from 4*0Sstevel@tonic-gate# Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk> 5*0Sstevel@tonic-gate# I've added the stuff needed for crypt() but I've not worried about making 6*0Sstevel@tonic-gate# things perfect. 7*0Sstevel@tonic-gate# 8*0Sstevel@tonic-gate 9*0Sstevel@tonic-gatepush(@INC,"perlasm","../../perlasm"); 10*0Sstevel@tonic-gaterequire "x86asm.pl"; 11*0Sstevel@tonic-gate 12*0Sstevel@tonic-gate&asm_init($ARGV[0],"crypt586.pl"); 13*0Sstevel@tonic-gate 14*0Sstevel@tonic-gate$L="edi"; 15*0Sstevel@tonic-gate$R="esi"; 16*0Sstevel@tonic-gate 17*0Sstevel@tonic-gate&external_label("DES_SPtrans"); 18*0Sstevel@tonic-gate&fcrypt_body("fcrypt_body"); 19*0Sstevel@tonic-gate&asm_finish(); 20*0Sstevel@tonic-gate 21*0Sstevel@tonic-gatesub fcrypt_body 22*0Sstevel@tonic-gate { 23*0Sstevel@tonic-gate local($name,$do_ip)=@_; 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate &function_begin($name,"EXTRN _DES_SPtrans:DWORD"); 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate &comment(""); 28*0Sstevel@tonic-gate &comment("Load the 2 words"); 29*0Sstevel@tonic-gate $trans="ebp"; 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate &xor( $L, $L); 32*0Sstevel@tonic-gate &xor( $R, $R); 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate # PIC-ification:-) 35*0Sstevel@tonic-gate &picmeup("edx","DES_SPtrans"); 36*0Sstevel@tonic-gate #if ($cpp) { &picmeup("edx","DES_SPtrans"); } 37*0Sstevel@tonic-gate #else { &lea("edx",&DWP("DES_SPtrans")); } 38*0Sstevel@tonic-gate &push("edx"); # becomes &swtmp(1) 39*0Sstevel@tonic-gate # 40*0Sstevel@tonic-gate &mov($trans,&wparam(1)); # reloaded with DES_SPtrans in D_ENCRYPT 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate &push(&DWC(25)); # add a variable 43*0Sstevel@tonic-gate 44*0Sstevel@tonic-gate &set_label("start"); 45*0Sstevel@tonic-gate for ($i=0; $i<16; $i+=2) 46*0Sstevel@tonic-gate { 47*0Sstevel@tonic-gate &comment(""); 48*0Sstevel@tonic-gate &comment("Round $i"); 49*0Sstevel@tonic-gate &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx"); 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate &comment(""); 52*0Sstevel@tonic-gate &comment("Round ".sprintf("%d",$i+1)); 53*0Sstevel@tonic-gate &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx"); 54*0Sstevel@tonic-gate } 55*0Sstevel@tonic-gate &mov("ebx", &swtmp(0)); 56*0Sstevel@tonic-gate &mov("eax", $L); 57*0Sstevel@tonic-gate &dec("ebx"); 58*0Sstevel@tonic-gate &mov($L, $R); 59*0Sstevel@tonic-gate &mov($R, "eax"); 60*0Sstevel@tonic-gate &mov(&swtmp(0), "ebx"); 61*0Sstevel@tonic-gate &jnz(&label("start")); 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate &comment(""); 64*0Sstevel@tonic-gate &comment("FP"); 65*0Sstevel@tonic-gate &mov("edx",&wparam(0)); 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate &FP_new($R,$L,"eax",3); 68*0Sstevel@tonic-gate &mov(&DWP(0,"edx","",0),"eax"); 69*0Sstevel@tonic-gate &mov(&DWP(4,"edx","",0),$L); 70*0Sstevel@tonic-gate 71*0Sstevel@tonic-gate &add("esp",8); # remove variables 72*0Sstevel@tonic-gate 73*0Sstevel@tonic-gate &function_end($name); 74*0Sstevel@tonic-gate } 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gatesub D_ENCRYPT 77*0Sstevel@tonic-gate { 78*0Sstevel@tonic-gate local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t)=@_; 79*0Sstevel@tonic-gate 80*0Sstevel@tonic-gate &mov( $u, &wparam(2)); # 2 81*0Sstevel@tonic-gate &mov( $t, $R); 82*0Sstevel@tonic-gate &shr( $t, 16); # 1 83*0Sstevel@tonic-gate &mov( $tmp2, &wparam(3)); # 2 84*0Sstevel@tonic-gate &xor( $t, $R); # 1 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate &and( $u, $t); # 2 87*0Sstevel@tonic-gate &and( $t, $tmp2); # 2 88*0Sstevel@tonic-gate 89*0Sstevel@tonic-gate &mov( $tmp1, $u); 90*0Sstevel@tonic-gate &shl( $tmp1, 16); # 1 91*0Sstevel@tonic-gate &mov( $tmp2, $t); 92*0Sstevel@tonic-gate &shl( $tmp2, 16); # 1 93*0Sstevel@tonic-gate &xor( $u, $tmp1); # 2 94*0Sstevel@tonic-gate &xor( $t, $tmp2); # 2 95*0Sstevel@tonic-gate &mov( $tmp1, &DWP(&n2a($S*4),$trans,"",0)); # 2 96*0Sstevel@tonic-gate &xor( $u, $tmp1); 97*0Sstevel@tonic-gate &mov( $tmp2, &DWP(&n2a(($S+1)*4),$trans,"",0)); # 2 98*0Sstevel@tonic-gate &xor( $u, $R); 99*0Sstevel@tonic-gate &xor( $t, $R); 100*0Sstevel@tonic-gate &xor( $t, $tmp2); 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate &and( $u, "0xfcfcfcfc" ); # 2 103*0Sstevel@tonic-gate &xor( $tmp1, $tmp1); # 1 104*0Sstevel@tonic-gate &and( $t, "0xcfcfcfcf" ); # 2 105*0Sstevel@tonic-gate &xor( $tmp2, $tmp2); 106*0Sstevel@tonic-gate &movb( &LB($tmp1), &LB($u) ); 107*0Sstevel@tonic-gate &movb( &LB($tmp2), &HB($u) ); 108*0Sstevel@tonic-gate &rotr( $t, 4 ); 109*0Sstevel@tonic-gate &mov( $trans, &swtmp(1)); 110*0Sstevel@tonic-gate &xor( $L, &DWP(" ",$trans,$tmp1,0)); 111*0Sstevel@tonic-gate &movb( &LB($tmp1), &LB($t) ); 112*0Sstevel@tonic-gate &xor( $L, &DWP("0x200",$trans,$tmp2,0)); 113*0Sstevel@tonic-gate &movb( &LB($tmp2), &HB($t) ); 114*0Sstevel@tonic-gate &shr( $u, 16); 115*0Sstevel@tonic-gate &xor( $L, &DWP("0x100",$trans,$tmp1,0)); 116*0Sstevel@tonic-gate &movb( &LB($tmp1), &HB($u) ); 117*0Sstevel@tonic-gate &shr( $t, 16); 118*0Sstevel@tonic-gate &xor( $L, &DWP("0x300",$trans,$tmp2,0)); 119*0Sstevel@tonic-gate &movb( &LB($tmp2), &HB($t) ); 120*0Sstevel@tonic-gate &and( $u, "0xff" ); 121*0Sstevel@tonic-gate &and( $t, "0xff" ); 122*0Sstevel@tonic-gate &mov( $tmp1, &DWP("0x600",$trans,$tmp1,0)); 123*0Sstevel@tonic-gate &xor( $L, $tmp1); 124*0Sstevel@tonic-gate &mov( $tmp1, &DWP("0x700",$trans,$tmp2,0)); 125*0Sstevel@tonic-gate &xor( $L, $tmp1); 126*0Sstevel@tonic-gate &mov( $tmp1, &DWP("0x400",$trans,$u,0)); 127*0Sstevel@tonic-gate &xor( $L, $tmp1); 128*0Sstevel@tonic-gate &mov( $tmp1, &DWP("0x500",$trans,$t,0)); 129*0Sstevel@tonic-gate &xor( $L, $tmp1); 130*0Sstevel@tonic-gate &mov( $trans, &wparam(1)); 131*0Sstevel@tonic-gate } 132*0Sstevel@tonic-gate 133*0Sstevel@tonic-gatesub n2a 134*0Sstevel@tonic-gate { 135*0Sstevel@tonic-gate sprintf("%d",$_[0]); 136*0Sstevel@tonic-gate } 137*0Sstevel@tonic-gate 138*0Sstevel@tonic-gate# now has a side affect of rotating $a by $shift 139*0Sstevel@tonic-gatesub R_PERM_OP 140*0Sstevel@tonic-gate { 141*0Sstevel@tonic-gate local($a,$b,$tt,$shift,$mask,$last)=@_; 142*0Sstevel@tonic-gate 143*0Sstevel@tonic-gate &rotl( $a, $shift ) if ($shift != 0); 144*0Sstevel@tonic-gate &mov( $tt, $a ); 145*0Sstevel@tonic-gate &xor( $a, $b ); 146*0Sstevel@tonic-gate &and( $a, $mask ); 147*0Sstevel@tonic-gate if ($notlast eq $b) 148*0Sstevel@tonic-gate { 149*0Sstevel@tonic-gate &xor( $b, $a ); 150*0Sstevel@tonic-gate &xor( $tt, $a ); 151*0Sstevel@tonic-gate } 152*0Sstevel@tonic-gate else 153*0Sstevel@tonic-gate { 154*0Sstevel@tonic-gate &xor( $tt, $a ); 155*0Sstevel@tonic-gate &xor( $b, $a ); 156*0Sstevel@tonic-gate } 157*0Sstevel@tonic-gate &comment(""); 158*0Sstevel@tonic-gate } 159*0Sstevel@tonic-gate 160*0Sstevel@tonic-gatesub IP_new 161*0Sstevel@tonic-gate { 162*0Sstevel@tonic-gate local($l,$r,$tt,$lr)=@_; 163*0Sstevel@tonic-gate 164*0Sstevel@tonic-gate &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l); 165*0Sstevel@tonic-gate &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l); 166*0Sstevel@tonic-gate &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r); 167*0Sstevel@tonic-gate &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r); 168*0Sstevel@tonic-gate &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r); 169*0Sstevel@tonic-gate 170*0Sstevel@tonic-gate if ($lr != 3) 171*0Sstevel@tonic-gate { 172*0Sstevel@tonic-gate if (($lr-3) < 0) 173*0Sstevel@tonic-gate { &rotr($tt, 3-$lr); } 174*0Sstevel@tonic-gate else { &rotl($tt, $lr-3); } 175*0Sstevel@tonic-gate } 176*0Sstevel@tonic-gate if ($lr != 2) 177*0Sstevel@tonic-gate { 178*0Sstevel@tonic-gate if (($lr-2) < 0) 179*0Sstevel@tonic-gate { &rotr($r, 2-$lr); } 180*0Sstevel@tonic-gate else { &rotl($r, $lr-2); } 181*0Sstevel@tonic-gate } 182*0Sstevel@tonic-gate } 183*0Sstevel@tonic-gate 184*0Sstevel@tonic-gatesub FP_new 185*0Sstevel@tonic-gate { 186*0Sstevel@tonic-gate local($l,$r,$tt,$lr)=@_; 187*0Sstevel@tonic-gate 188*0Sstevel@tonic-gate if ($lr != 2) 189*0Sstevel@tonic-gate { 190*0Sstevel@tonic-gate if (($lr-2) < 0) 191*0Sstevel@tonic-gate { &rotl($r, 2-$lr); } 192*0Sstevel@tonic-gate else { &rotr($r, $lr-2); } 193*0Sstevel@tonic-gate } 194*0Sstevel@tonic-gate if ($lr != 3) 195*0Sstevel@tonic-gate { 196*0Sstevel@tonic-gate if (($lr-3) < 0) 197*0Sstevel@tonic-gate { &rotl($l, 3-$lr); } 198*0Sstevel@tonic-gate else { &rotr($l, $lr-3); } 199*0Sstevel@tonic-gate } 200*0Sstevel@tonic-gate 201*0Sstevel@tonic-gate &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r); 202*0Sstevel@tonic-gate &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r); 203*0Sstevel@tonic-gate &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l); 204*0Sstevel@tonic-gate &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l); 205*0Sstevel@tonic-gate &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r); 206*0Sstevel@tonic-gate &rotr($tt , 4); 207*0Sstevel@tonic-gate } 208*0Sstevel@tonic-gate 209