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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/crypto/des/asm/des-586.pl
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Diffstat (limited to 'openssl/crypto/des/asm/des-586.pl')
-rw-r--r--openssl/crypto/des/asm/des-586.pl251
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);
+ }
+