diff options
Diffstat (limited to 'openssl/crypto/des/asm/des-586.pl')
| -rw-r--r-- | openssl/crypto/des/asm/des-586.pl | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/openssl/crypto/des/asm/des-586.pl b/openssl/crypto/des/asm/des-586.pl new file mode 100644 index 000000000..b75d3c6b3 --- /dev/null +++ b/openssl/crypto/des/asm/des-586.pl @@ -0,0 +1,251 @@ +#!/usr/local/bin/perl +# +# The inner loop instruction sequence and the IP/FP modifications are from +# Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk> +# + +push(@INC,"perlasm","../../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"; +$R="esi"; + +&external_label("DES_SPtrans"); +&DES_encrypt("DES_encrypt1",1); +&DES_encrypt("DES_encrypt2",0); +&DES_encrypt3("DES_encrypt3",1); +&DES_encrypt3("DES_decrypt3",0); +&cbc("DES_ncbc_encrypt","DES_encrypt1","DES_encrypt1",0,4,5,3,5,-1); +&cbc("DES_ede3_cbc_encrypt","DES_encrypt3","DES_decrypt3",0,6,7,3,4,5); + +&asm_finish(); + +sub DES_encrypt + { + local($name,$do_ip)=@_; + + &function_begin_B($name,"EXTRN _DES_SPtrans:DWORD"); + + &push("esi"); + &push("edi"); + + &comment(""); + &comment("Load the 2 words"); + $trans="ebp"; + + if ($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:-) + &picmeup($trans,"DES_SPtrans"); + #if ($cpp) { &picmeup($trans,"DES_SPtrans"); } + #else { &lea($trans,&DWP("DES_SPtrans")); } + + &mov( "ecx", &wparam(1) ); + &cmp("ebx","0"); + &je(&label("start_decrypt")); + + for ($i=0; $i<16; $i+=2) + { + &comment(""); + &comment("Round $i"); + &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx"); + + &comment(""); + &comment("Round ".sprintf("%d",$i+1)); + &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx"); + } + &jmp(&label("end")); + + &set_label("start_decrypt"); + + for ($i=15; $i>0; $i-=2) + { + &comment(""); + &comment("Round $i"); + &D_ENCRYPT(15-$i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx"); + &comment(""); + &comment("Round ".sprintf("%d",$i-1)); + &D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$trans,"eax","ebx","ecx","edx"); + } + + &set_label("end"); + + 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)=@_; + + &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, &wparam(1) ); + &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); + } + |