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| 1 #!/usr/local/bin/perl | |
| 2 # | |
| 3 # The inner loop instruction sequence and the IP/FP modifications are from | |
| 4 # Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk> | |
| 5 # I've added the stuff needed for crypt() but I've not worried about making | |
| 6 # things perfect. | |
| 7 # | |
| 8 | |
| 9 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; | |
| 10 push(@INC,"${dir}","${dir}../../perlasm"); | |
| 11 require "x86asm.pl"; | |
| 12 | |
| 13 &asm_init($ARGV[0],"crypt586.pl"); | |
| 14 | |
| 15 $L="edi"; | |
| 16 $R="esi"; | |
| 17 | |
| 18 &external_label("DES_SPtrans"); | |
| 19 &fcrypt_body("fcrypt_body"); | |
| 20 &asm_finish(); | |
| 21 | |
| 22 sub fcrypt_body | |
| 23 { | |
| 24 local($name,$do_ip)=@_; | |
| 25 | |
| 26 &function_begin($name); | |
| 27 | |
| 28 &comment(""); | |
| 29 &comment("Load the 2 words"); | |
| 30 $trans="ebp"; | |
| 31 | |
| 32 &xor( $L, $L); | |
| 33 &xor( $R, $R); | |
| 34 | |
| 35 # PIC-ification:-) | |
| 36 &picmeup("edx","DES_SPtrans"); | |
| 37 #if ($cpp) { &picmeup("edx","DES_SPtrans"); } | |
| 38 #else { &lea("edx",&DWP("DES_SPtrans")); } | |
| 39 &push("edx"); # becomes &swtmp(1) | |
| 40 # | |
| 41 &mov($trans,&wparam(1)); # reloaded with DES_SPtrans in D_ENCRYPT | |
| 42 | |
| 43 &push(&DWC(25)); # add a variable | |
| 44 | |
| 45 &set_label("start"); | |
| 46 for ($i=0; $i<16; $i+=2) | |
| 47 { | |
| 48 &comment(""); | |
| 49 &comment("Round $i"); | |
| 50 &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx"); | |
| 51 | |
| 52 &comment(""); | |
| 53 &comment("Round ".sprintf("%d",$i+1)); | |
| 54 &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx"); | |
| 55 } | |
| 56 &mov("ebx", &swtmp(0)); | |
| 57 &mov("eax", $L); | |
| 58 &dec("ebx"); | |
| 59 &mov($L, $R); | |
| 60 &mov($R, "eax"); | |
| 61 &mov(&swtmp(0), "ebx"); | |
| 62 &jnz(&label("start")); | |
| 63 | |
| 64 &comment(""); | |
| 65 &comment("FP"); | |
| 66 &mov("edx",&wparam(0)); | |
| 67 | |
| 68 &FP_new($R,$L,"eax",3); | |
| 69 &mov(&DWP(0,"edx","",0),"eax"); | |
| 70 &mov(&DWP(4,"edx","",0),$L); | |
| 71 | |
| 72 &add("esp",8); # remove variables | |
| 73 | |
| 74 &function_end($name); | |
| 75 } | |
| 76 | |
| 77 sub D_ENCRYPT | |
| 78 { | |
| 79 local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t)=@_; | |
| 80 | |
| 81 &mov( $u, &wparam(2)); # 2 | |
| 82 &mov( $t, $R); | |
| 83 &shr( $t, 16); # 1 | |
| 84 &mov( $tmp2, &wparam(3)); # 2 | |
| 85 &xor( $t, $R); # 1 | |
| 86 | |
| 87 &and( $u, $t); # 2 | |
| 88 &and( $t, $tmp2); # 2 | |
| 89 | |
| 90 &mov( $tmp1, $u); | |
| 91 &shl( $tmp1, 16); # 1 | |
| 92 &mov( $tmp2, $t); | |
| 93 &shl( $tmp2, 16); # 1 | |
| 94 &xor( $u, $tmp1); # 2 | |
| 95 &xor( $t, $tmp2); # 2 | |
| 96 &mov( $tmp1, &DWP(&n2a($S*4),$trans,"",0)); # 2 | |
| 97 &xor( $u, $tmp1); | |
| 98 &mov( $tmp2, &DWP(&n2a(($S+1)*4),$trans,"",0)); # 2 | |
| 99 &xor( $u, $R); | |
| 100 &xor( $t, $R); | |
| 101 &xor( $t, $tmp2); | |
| 102 | |
| 103 &and( $u, "0xfcfcfcfc" ); # 2 | |
| 104 &xor( $tmp1, $tmp1); # 1 | |
| 105 &and( $t, "0xcfcfcfcf" ); # 2 | |
| 106 &xor( $tmp2, $tmp2); | |
| 107 &movb( &LB($tmp1), &LB($u) ); | |
| 108 &movb( &LB($tmp2), &HB($u) ); | |
| 109 &rotr( $t, 4 ); | |
| 110 &mov( $trans, &swtmp(1)); | |
| 111 &xor( $L, &DWP(" ",$trans,$tmp1,0)); | |
| 112 &movb( &LB($tmp1), &LB($t) ); | |
| 113 &xor( $L, &DWP("0x200",$trans,$tmp2,0)); | |
| 114 &movb( &LB($tmp2), &HB($t) ); | |
| 115 &shr( $u, 16); | |
| 116 &xor( $L, &DWP("0x100",$trans,$tmp1,0)); | |
| 117 &movb( &LB($tmp1), &HB($u) ); | |
| 118 &shr( $t, 16); | |
| 119 &xor( $L, &DWP("0x300",$trans,$tmp2,0)); | |
| 120 &movb( &LB($tmp2), &HB($t) ); | |
| 121 &and( $u, "0xff" ); | |
| 122 &and( $t, "0xff" ); | |
| 123 &mov( $tmp1, &DWP("0x600",$trans,$tmp1,0)); | |
| 124 &xor( $L, $tmp1); | |
| 125 &mov( $tmp1, &DWP("0x700",$trans,$tmp2,0)); | |
| 126 &xor( $L, $tmp1); | |
| 127 &mov( $tmp1, &DWP("0x400",$trans,$u,0)); | |
| 128 &xor( $L, $tmp1); | |
| 129 &mov( $tmp1, &DWP("0x500",$trans,$t,0)); | |
| 130 &xor( $L, $tmp1); | |
| 131 &mov( $trans, &wparam(1)); | |
| 132 } | |
| 133 | |
| 134 sub n2a | |
| 135 { | |
| 136 sprintf("%d",$_[0]); | |
| 137 } | |
| 138 | |
| 139 # now has a side affect of rotating $a by $shift | |
| 140 sub R_PERM_OP | |
| 141 { | |
| 142 local($a,$b,$tt,$shift,$mask,$last)=@_; | |
| 143 | |
| 144 &rotl( $a, $shift ) if ($shift != 0); | |
| 145 &mov( $tt, $a ); | |
| 146 &xor( $a, $b ); | |
| 147 &and( $a, $mask ); | |
| 148 if ($notlast eq $b) | |
| 149 { | |
| 150 &xor( $b, $a ); | |
| 151 &xor( $tt, $a ); | |
| 152 } | |
| 153 else | |
| 154 { | |
| 155 &xor( $tt, $a ); | |
| 156 &xor( $b, $a ); | |
| 157 } | |
| 158 &comment(""); | |
| 159 } | |
| 160 | |
| 161 sub IP_new | |
| 162 { | |
| 163 local($l,$r,$tt,$lr)=@_; | |
| 164 | |
| 165 &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l); | |
| 166 &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l); | |
| 167 &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r); | |
| 168 &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r); | |
| 169 &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r); | |
| 170 | |
| 171 if ($lr != 3) | |
| 172 { | |
| 173 if (($lr-3) < 0) | |
| 174 { &rotr($tt, 3-$lr); } | |
| 175 else { &rotl($tt, $lr-3); } | |
| 176 } | |
| 177 if ($lr != 2) | |
| 178 { | |
| 179 if (($lr-2) < 0) | |
| 180 { &rotr($r, 2-$lr); } | |
| 181 else { &rotl($r, $lr-2); } | |
| 182 } | |
| 183 } | |
| 184 | |
| 185 sub FP_new | |
| 186 { | |
| 187 local($l,$r,$tt,$lr)=@_; | |
| 188 | |
| 189 if ($lr != 2) | |
| 190 { | |
| 191 if (($lr-2) < 0) | |
| 192 { &rotl($r, 2-$lr); } | |
| 193 else { &rotr($r, $lr-2); } | |
| 194 } | |
| 195 if ($lr != 3) | |
| 196 { | |
| 197 if (($lr-3) < 0) | |
| 198 { &rotl($l, 3-$lr); } | |
| 199 else { &rotr($l, $lr-3); } | |
| 200 } | |
| 201 | |
| 202 &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r); | |
| 203 &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r); | |
| 204 &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l); | |
| 205 &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l); | |
| 206 &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r); | |
| 207 &rotr($tt , 4); | |
| 208 } | |
| 209 | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master