| #!/usr/local/bin/perl |
| # |
| # The inner loop instruction sequence and the IP/FP modifications are from |
| # Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk> |
| # |
| |
| $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1; |
| push(@INC,"${dir}","${dir}../../perlasm"); |
| require "x86asm.pl"; |
| require "cbc.pl"; |
| require "desboth.pl"; |
| |
| # base code is in microsft |
| # op dest, source |
| # format. |
| # |
| |
| &asm_init($ARGV[0],"des-586.pl"); |
| |
| $L="edi"; |
| $R="esi"; |
| $trans="ebp"; |
| $small_footprint=1 if (grep(/\-DOPENSSL_SMALL_FOOTPRINT/,@ARGV)); |
| # one can discuss setting this variable to 1 unconditionally, as |
| # the folded loop is only 3% slower than unrolled, but >7 times smaller |
| |
| &public_label("DES_SPtrans"); |
| |
| &DES_encrypt_internal(); |
| &DES_decrypt_internal(); |
| &DES_encrypt("DES_encrypt1",1); |
| &DES_encrypt("DES_encrypt2",0); |
| &DES_encrypt3("DES_encrypt3",1); |
| &DES_encrypt3("DES_decrypt3",0); |
| &cbc("DES_ncbc_encrypt","DES_encrypt1","DES_encrypt1",0,4,5,3,5,-1); |
| &cbc("DES_ede3_cbc_encrypt","DES_encrypt3","DES_decrypt3",0,6,7,3,4,5); |
| &DES_SPtrans(); |
| |
| &asm_finish(); |
| |
| sub DES_encrypt_internal() |
| { |
| &function_begin_B("_x86_DES_encrypt"); |
| |
| if ($small_footprint) |
| { |
| &lea("edx",&DWP(128,"ecx")); |
| &push("edx"); |
| &push("ecx"); |
| &set_label("eloop"); |
| &D_ENCRYPT(0,$L,$R,0,$trans,"eax","ebx","ecx","edx",&swtmp(0)); |
| &comment(""); |
| &D_ENCRYPT(1,$R,$L,2,$trans,"eax","ebx","ecx","edx",&swtmp(0)); |
| &comment(""); |
| &add("ecx",16); |
| &cmp("ecx",&swtmp(1)); |
| &mov(&swtmp(0),"ecx"); |
| &jb(&label("eloop")); |
| &add("esp",8); |
| } |
| else |
| { |
| &push("ecx"); |
| for ($i=0; $i<16; $i+=2) |
| { |
| &comment("Round $i"); |
| &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx",&swtmp(0)); |
| &comment("Round ".sprintf("%d",$i+1)); |
| &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx",&swtmp(0)); |
| } |
| &add("esp",4); |
| } |
| &ret(); |
| |
| &function_end_B("_x86_DES_encrypt"); |
| } |
| |
| sub DES_decrypt_internal() |
| { |
| &function_begin_B("_x86_DES_decrypt"); |
| |
| if ($small_footprint) |
| { |
| &push("ecx"); |
| &lea("ecx",&DWP(128,"ecx")); |
| &push("ecx"); |
| &set_label("dloop"); |
| &D_ENCRYPT(0,$L,$R,-2,$trans,"eax","ebx","ecx","edx",&swtmp(0)); |
| &comment(""); |
| &D_ENCRYPT(1,$R,$L,-4,$trans,"eax","ebx","ecx","edx",&swtmp(0)); |
| &comment(""); |
| &sub("ecx",16); |
| &cmp("ecx",&swtmp(1)); |
| &mov(&swtmp(0),"ecx"); |
| &ja(&label("dloop")); |
| &add("esp",8); |
| } |
| else |
| { |
| &push("ecx"); |
| for ($i=15; $i>0; $i-=2) |
| { |
| &comment("Round $i"); |
| &D_ENCRYPT(15-$i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx",&swtmp(0)); |
| &comment("Round ".sprintf("%d",$i-1)); |
| &D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$trans,"eax","ebx","ecx","edx",&swtmp(0)); |
| } |
| &add("esp",4); |
| } |
| &ret(); |
| |
| &function_end_B("_x86_DES_decrypt"); |
| } |
| |
| sub DES_encrypt |
| { |
| local($name,$do_ip)=@_; |
| |
| &function_begin_B($name); |
| |
| &push("esi"); |
| &push("edi"); |
| |
| &comment(""); |
| &comment("Load the 2 words"); |
| |
| if ($do_ip) |
| { |
| &mov($R,&wparam(0)); |
| &xor( "ecx", "ecx" ); |
| |
| &push("ebx"); |
| &push("ebp"); |
| |
| &mov("eax",&DWP(0,$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" ); |
| |
| &push("ebx"); |
| &push("ebp"); |
| |
| &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); |
| } |
| |
| # PIC-ification:-) |
| &call (&label("pic_point")); |
| &set_label("pic_point"); |
| &blindpop($trans); |
| &lea ($trans,&DWP(&label("DES_SPtrans")."-".&label("pic_point"),$trans)); |
| |
| &mov( "ecx", &wparam(1) ); |
| |
| &cmp("ebx","0"); |
| &je(&label("decrypt")); |
| &call("_x86_DES_encrypt"); |
| &jmp(&label("done")); |
| &set_label("decrypt"); |
| &call("_x86_DES_decrypt"); |
| &set_label("done"); |
| |
| if ($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),$R); |
| } |
| |
| &pop("ebp"); |
| &pop("ebx"); |
| &pop("edi"); |
| &pop("esi"); |
| &ret(); |
| |
| &function_end_B($name); |
| } |
| |
| sub D_ENCRYPT |
| { |
| local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t,$wp1)=@_; |
| |
| &mov( $u, &DWP(&n2a($S*4),$tmp2,"",0)); |
| &xor( $tmp1, $tmp1); |
| &mov( $t, &DWP(&n2a(($S+1)*4),$tmp2,"",0)); |
| &xor( $u, $R); |
| &xor( $tmp2, $tmp2); |
| &xor( $t, $R); |
| &and( $u, "0xfcfcfcfc" ); |
| &and( $t, "0xcfcfcfcf" ); |
| &movb( &LB($tmp1), &LB($u) ); |
| &movb( &LB($tmp2), &HB($u) ); |
| &rotr( $t, 4 ); |
| &xor( $L, &DWP(" ",$trans,$tmp1,0)); |
| &movb( &LB($tmp1), &LB($t) ); |
| &xor( $L, &DWP("0x200",$trans,$tmp2,0)); |
| &movb( &LB($tmp2), &HB($t) ); |
| &shr( $u, 16); |
| &xor( $L, &DWP("0x100",$trans,$tmp1,0)); |
| &movb( &LB($tmp1), &HB($u) ); |
| &shr( $t, 16); |
| &xor( $L, &DWP("0x300",$trans,$tmp2,0)); |
| &movb( &LB($tmp2), &HB($t) ); |
| &and( $u, "0xff" ); |
| &and( $t, "0xff" ); |
| &xor( $L, &DWP("0x600",$trans,$tmp1,0)); |
| &xor( $L, &DWP("0x700",$trans,$tmp2,0)); |
| &mov( $tmp2, $wp1 ); |
| &xor( $L, &DWP("0x400",$trans,$u,0)); |
| &xor( $L, &DWP("0x500",$trans,$t,0)); |
| } |
| |
| sub n2a |
| { |
| sprintf("%d",$_[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, $mask ); |
| # This can never succeed, and besides it is difficult to see what the |
| # idea was - Ben 13 Feb 99 |
| if (!$last 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); |
| } |
| |
| sub DES_SPtrans |
| { |
| &set_label("DES_SPtrans",64); |
| &data_word(0x02080800, 0x00080000, 0x02000002, 0x02080802); |
| &data_word(0x02000000, 0x00080802, 0x00080002, 0x02000002); |
| &data_word(0x00080802, 0x02080800, 0x02080000, 0x00000802); |
| &data_word(0x02000802, 0x02000000, 0x00000000, 0x00080002); |
| &data_word(0x00080000, 0x00000002, 0x02000800, 0x00080800); |
| &data_word(0x02080802, 0x02080000, 0x00000802, 0x02000800); |
| &data_word(0x00000002, 0x00000800, 0x00080800, 0x02080002); |
| &data_word(0x00000800, 0x02000802, 0x02080002, 0x00000000); |
| &data_word(0x00000000, 0x02080802, 0x02000800, 0x00080002); |
| &data_word(0x02080800, 0x00080000, 0x00000802, 0x02000800); |
| &data_word(0x02080002, 0x00000800, 0x00080800, 0x02000002); |
| &data_word(0x00080802, 0x00000002, 0x02000002, 0x02080000); |
| &data_word(0x02080802, 0x00080800, 0x02080000, 0x02000802); |
| &data_word(0x02000000, 0x00000802, 0x00080002, 0x00000000); |
| &data_word(0x00080000, 0x02000000, 0x02000802, 0x02080800); |
| &data_word(0x00000002, 0x02080002, 0x00000800, 0x00080802); |
| # nibble 1 |
| &data_word(0x40108010, 0x00000000, 0x00108000, 0x40100000); |
| &data_word(0x40000010, 0x00008010, 0x40008000, 0x00108000); |
| &data_word(0x00008000, 0x40100010, 0x00000010, 0x40008000); |
| &data_word(0x00100010, 0x40108000, 0x40100000, 0x00000010); |
| &data_word(0x00100000, 0x40008010, 0x40100010, 0x00008000); |
| &data_word(0x00108010, 0x40000000, 0x00000000, 0x00100010); |
| &data_word(0x40008010, 0x00108010, 0x40108000, 0x40000010); |
| &data_word(0x40000000, 0x00100000, 0x00008010, 0x40108010); |
| &data_word(0x00100010, 0x40108000, 0x40008000, 0x00108010); |
| &data_word(0x40108010, 0x00100010, 0x40000010, 0x00000000); |
| &data_word(0x40000000, 0x00008010, 0x00100000, 0x40100010); |
| &data_word(0x00008000, 0x40000000, 0x00108010, 0x40008010); |
| &data_word(0x40108000, 0x00008000, 0x00000000, 0x40000010); |
| &data_word(0x00000010, 0x40108010, 0x00108000, 0x40100000); |
| &data_word(0x40100010, 0x00100000, 0x00008010, 0x40008000); |
| &data_word(0x40008010, 0x00000010, 0x40100000, 0x00108000); |
| # nibble 2 |
| &data_word(0x04000001, 0x04040100, 0x00000100, 0x04000101); |
| &data_word(0x00040001, 0x04000000, 0x04000101, 0x00040100); |
| &data_word(0x04000100, 0x00040000, 0x04040000, 0x00000001); |
| &data_word(0x04040101, 0x00000101, 0x00000001, 0x04040001); |
| &data_word(0x00000000, 0x00040001, 0x04040100, 0x00000100); |
| &data_word(0x00000101, 0x04040101, 0x00040000, 0x04000001); |
| &data_word(0x04040001, 0x04000100, 0x00040101, 0x04040000); |
| &data_word(0x00040100, 0x00000000, 0x04000000, 0x00040101); |
| &data_word(0x04040100, 0x00000100, 0x00000001, 0x00040000); |
| &data_word(0x00000101, 0x00040001, 0x04040000, 0x04000101); |
| &data_word(0x00000000, 0x04040100, 0x00040100, 0x04040001); |
| &data_word(0x00040001, 0x04000000, 0x04040101, 0x00000001); |
| &data_word(0x00040101, 0x04000001, 0x04000000, 0x04040101); |
| &data_word(0x00040000, 0x04000100, 0x04000101, 0x00040100); |
| &data_word(0x04000100, 0x00000000, 0x04040001, 0x00000101); |
| &data_word(0x04000001, 0x00040101, 0x00000100, 0x04040000); |
| # nibble 3 |
| &data_word(0x00401008, 0x10001000, 0x00000008, 0x10401008); |
| &data_word(0x00000000, 0x10400000, 0x10001008, 0x00400008); |
| &data_word(0x10401000, 0x10000008, 0x10000000, 0x00001008); |
| &data_word(0x10000008, 0x00401008, 0x00400000, 0x10000000); |
| &data_word(0x10400008, 0x00401000, 0x00001000, 0x00000008); |
| &data_word(0x00401000, 0x10001008, 0x10400000, 0x00001000); |
| &data_word(0x00001008, 0x00000000, 0x00400008, 0x10401000); |
| &data_word(0x10001000, 0x10400008, 0x10401008, 0x00400000); |
| &data_word(0x10400008, 0x00001008, 0x00400000, 0x10000008); |
| &data_word(0x00401000, 0x10001000, 0x00000008, 0x10400000); |
| &data_word(0x10001008, 0x00000000, 0x00001000, 0x00400008); |
| &data_word(0x00000000, 0x10400008, 0x10401000, 0x00001000); |
| &data_word(0x10000000, 0x10401008, 0x00401008, 0x00400000); |
| &data_word(0x10401008, 0x00000008, 0x10001000, 0x00401008); |
| &data_word(0x00400008, 0x00401000, 0x10400000, 0x10001008); |
| &data_word(0x00001008, 0x10000000, 0x10000008, 0x10401000); |
| # nibble 4 |
| &data_word(0x08000000, 0x00010000, 0x00000400, 0x08010420); |
| &data_word(0x08010020, 0x08000400, 0x00010420, 0x08010000); |
| &data_word(0x00010000, 0x00000020, 0x08000020, 0x00010400); |
| &data_word(0x08000420, 0x08010020, 0x08010400, 0x00000000); |
| &data_word(0x00010400, 0x08000000, 0x00010020, 0x00000420); |
| &data_word(0x08000400, 0x00010420, 0x00000000, 0x08000020); |
| &data_word(0x00000020, 0x08000420, 0x08010420, 0x00010020); |
| &data_word(0x08010000, 0x00000400, 0x00000420, 0x08010400); |
| &data_word(0x08010400, 0x08000420, 0x00010020, 0x08010000); |
| &data_word(0x00010000, 0x00000020, 0x08000020, 0x08000400); |
| &data_word(0x08000000, 0x00010400, 0x08010420, 0x00000000); |
| &data_word(0x00010420, 0x08000000, 0x00000400, 0x00010020); |
| &data_word(0x08000420, 0x00000400, 0x00000000, 0x08010420); |
| &data_word(0x08010020, 0x08010400, 0x00000420, 0x00010000); |
| &data_word(0x00010400, 0x08010020, 0x08000400, 0x00000420); |
| &data_word(0x00000020, 0x00010420, 0x08010000, 0x08000020); |
| # nibble 5 |
| &data_word(0x80000040, 0x00200040, 0x00000000, 0x80202000); |
| &data_word(0x00200040, 0x00002000, 0x80002040, 0x00200000); |
| &data_word(0x00002040, 0x80202040, 0x00202000, 0x80000000); |
| &data_word(0x80002000, 0x80000040, 0x80200000, 0x00202040); |
| &data_word(0x00200000, 0x80002040, 0x80200040, 0x00000000); |
| &data_word(0x00002000, 0x00000040, 0x80202000, 0x80200040); |
| &data_word(0x80202040, 0x80200000, 0x80000000, 0x00002040); |
| &data_word(0x00000040, 0x00202000, 0x00202040, 0x80002000); |
| &data_word(0x00002040, 0x80000000, 0x80002000, 0x00202040); |
| &data_word(0x80202000, 0x00200040, 0x00000000, 0x80002000); |
| &data_word(0x80000000, 0x00002000, 0x80200040, 0x00200000); |
| &data_word(0x00200040, 0x80202040, 0x00202000, 0x00000040); |
| &data_word(0x80202040, 0x00202000, 0x00200000, 0x80002040); |
| &data_word(0x80000040, 0x80200000, 0x00202040, 0x00000000); |
| &data_word(0x00002000, 0x80000040, 0x80002040, 0x80202000); |
| &data_word(0x80200000, 0x00002040, 0x00000040, 0x80200040); |
| # nibble 6 |
| &data_word(0x00004000, 0x00000200, 0x01000200, 0x01000004); |
| &data_word(0x01004204, 0x00004004, 0x00004200, 0x00000000); |
| &data_word(0x01000000, 0x01000204, 0x00000204, 0x01004000); |
| &data_word(0x00000004, 0x01004200, 0x01004000, 0x00000204); |
| &data_word(0x01000204, 0x00004000, 0x00004004, 0x01004204); |
| &data_word(0x00000000, 0x01000200, 0x01000004, 0x00004200); |
| &data_word(0x01004004, 0x00004204, 0x01004200, 0x00000004); |
| &data_word(0x00004204, 0x01004004, 0x00000200, 0x01000000); |
| &data_word(0x00004204, 0x01004000, 0x01004004, 0x00000204); |
| &data_word(0x00004000, 0x00000200, 0x01000000, 0x01004004); |
| &data_word(0x01000204, 0x00004204, 0x00004200, 0x00000000); |
| &data_word(0x00000200, 0x01000004, 0x00000004, 0x01000200); |
| &data_word(0x00000000, 0x01000204, 0x01000200, 0x00004200); |
| &data_word(0x00000204, 0x00004000, 0x01004204, 0x01000000); |
| &data_word(0x01004200, 0x00000004, 0x00004004, 0x01004204); |
| &data_word(0x01000004, 0x01004200, 0x01004000, 0x00004004); |
| # nibble 7 |
| &data_word(0x20800080, 0x20820000, 0x00020080, 0x00000000); |
| &data_word(0x20020000, 0x00800080, 0x20800000, 0x20820080); |
| &data_word(0x00000080, 0x20000000, 0x00820000, 0x00020080); |
| &data_word(0x00820080, 0x20020080, 0x20000080, 0x20800000); |
| &data_word(0x00020000, 0x00820080, 0x00800080, 0x20020000); |
| &data_word(0x20820080, 0x20000080, 0x00000000, 0x00820000); |
| &data_word(0x20000000, 0x00800000, 0x20020080, 0x20800080); |
| &data_word(0x00800000, 0x00020000, 0x20820000, 0x00000080); |
| &data_word(0x00800000, 0x00020000, 0x20000080, 0x20820080); |
| &data_word(0x00020080, 0x20000000, 0x00000000, 0x00820000); |
| &data_word(0x20800080, 0x20020080, 0x20020000, 0x00800080); |
| &data_word(0x20820000, 0x00000080, 0x00800080, 0x20020000); |
| &data_word(0x20820080, 0x00800000, 0x20800000, 0x20000080); |
| &data_word(0x00820000, 0x00020080, 0x20020080, 0x20800000); |
| &data_word(0x00000080, 0x20820000, 0x00820080, 0x00000000); |
| &data_word(0x20000000, 0x20800080, 0x00020000, 0x00820080); |
| } |
