[people/ms/strongswan.git] / src / libfreeswan / libcrypto / libdes / asm / des-586.pl

#!/usr/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_encrypt",1);
&des_encrypt("des_encrypt2",0);
&des_encrypt3("des_encrypt3",1);
&des_encrypt3("des_decrypt3",0);
&cbc("des_ncbc_encrypt","des_encrypt","des_encrypt",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");
	$ks="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);
		}

	&mov(	$ks,		&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,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");

		&comment("");
		&comment("Round ".sprintf("%d",$i+1));
		&D_ENCRYPT($i+1,$R,$L,($i+1)*2,$ks,"des_SPtrans","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,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
		&comment("");
		&comment("Round ".sprintf("%d",$i-1));
		&D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$ks,"des_SPtrans","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,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_;

	 &mov(	$u,		&DWP(&n2a($S*4),$ks,"",0));
	&xor(	$tmp1,		$tmp1);
	 &mov(	$t,		&DWP(&n2a(($S+1)*4),$ks,"",0));
	&xor(	$u,		$R);
	 &xor(	$t,		$R);
	&and(	$u,		"0xfcfcfcfc"	);
	 &and(	$t,		"0xcfcfcfcf"	);
	&movb(	&LB($tmp1),	&LB($u)	);
	 &movb(	&LB($tmp2),	&HB($u)	);
	&rotr(	$t,		4		);
	&mov(	$ks,		&DWP("      $desSP",$tmp1,"",0));
	 &movb(	&LB($tmp1),	&LB($t)	);
	&xor(	$L,		$ks);
	 &mov(	$ks,		&DWP("0x200+$desSP",$tmp2,"",0));
	&xor(	$L,		$ks); ######
	 &movb(	&LB($tmp2),	&HB($t)	);
	&shr(	$u,		16);
	 &mov(	$ks,		&DWP("0x100+$desSP",$tmp1,"",0));
	&xor(	$L,		$ks); ######
	 &movb(	&LB($tmp1),	&HB($u)	);
	&shr(	$t,		16);
	 &mov(	$ks,		&DWP("0x300+$desSP",$tmp2,"",0));
	&xor(	$L,		$ks);
	 &mov(	$ks,		&wparam(1)	);
	&movb(	&LB($tmp2),	&HB($t)	);
	 &and(	$u,		"0xff"	);
	&and(	$t,		"0xff"	);
	 &mov(	$tmp1,		&DWP("0x600+$desSP",$tmp1,"",0));
	&xor(	$L,		$tmp1);
	 &mov(	$tmp1,		&DWP("0x700+$desSP",$tmp2,"",0));
	&xor(	$L,		$tmp1);
	 &mov(	$tmp1,		&DWP("0x400+$desSP",$u,"",0));
	&xor(	$L,		$tmp1);
	 &mov(	$tmp1,		&DWP("0x500+$desSP",$t,"",0));
	&xor(	$L,		$tmp1);
	}

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,		$mask		);
	if (!$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($tt	, 4);
	}
Commit	Line	Data
997358a6 MW	1	#!/usr/bin/perl
	2	#
	3	# The inner loop instruction sequence and the IP/FP modifications are from
	4	# Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk>
	5	#
	6
	7	push(@INC,"perlasm","../../perlasm");
	8	require "x86asm.pl";
	9	require "cbc.pl";
	10	require "desboth.pl";
	11
	12	# base code is in microsft
	13	# op dest, source
	14	# format.
	15	#
	16
	17	&asm_init($ARGV[0],"des-586.pl");
	18
	19	$L="edi";
	20	$R="esi";
	21
	22	&external_label("des_SPtrans");
	23	&des_encrypt("des_encrypt",1);
	24	&des_encrypt("des_encrypt2",0);
	25	&des_encrypt3("des_encrypt3",1);
	26	&des_encrypt3("des_decrypt3",0);
	27	&cbc("des_ncbc_encrypt","des_encrypt","des_encrypt",0,4,5,3,5,-1);
	28	&cbc("des_ede3_cbc_encrypt","des_encrypt3","des_decrypt3",0,6,7,3,4,5);
	29
	30	&asm_finish();
	31
	32	sub des_encrypt
	33	{
	34	local($name,$do_ip)=@_;
	35
	36	&function_begin_B($name,"EXTRN _des_SPtrans:DWORD");
	37
	38	&push("esi");
	39	&push("edi");
	40
	41	&comment("");
	42	&comment("Load the 2 words");
	43	$ks="ebp";
	44
	45	if ($do_ip)
	46	{
	47	&mov($R,&wparam(0));
	48	&xor( "ecx", "ecx" );
	49
	50	&push("ebx");
	51	&push("ebp");
	52
	53	&mov("eax",&DWP(0,$R,"",0));
	54	&mov("ebx",&wparam(2)); # get encrypt flag
	55	&mov($L,&DWP(4,$R,"",0));
	56	&comment("");
	57	&comment("IP");
	58	&IP_new("eax",$L,$R,3);
	59	}
	60	else
	61	{
	62	&mov("eax",&wparam(0));
	63	&xor( "ecx", "ecx" );
	64
65	&push("ebx");
66	&push("ebp");
67
68	&mov($R,&DWP(0,"eax","",0));
69	&mov("ebx",&wparam(2)); # get encrypt flag
70	&rotl($R,3);
71	&mov($L,&DWP(4,"eax","",0));
72	&rotl($L,3);
73	}
74
75	&mov( $ks, &wparam(1) );
76	&cmp("ebx","0");
77	&je(&label("start_decrypt"));
78
79	for ($i=0; $i<16; $i+=2)
80	{
81	&comment("");
82	&comment("Round $i");
83	&D_ENCRYPT($i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
84
85	&comment("");
86	&comment("Round ".sprintf("%d",$i+1));
87	&D_ENCRYPT($i+1,$R,$L,($i+1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
88	}
89	&jmp(&label("end"));
90
91	&set_label("start_decrypt");
92
93	for ($i=15; $i>0; $i-=2)
94	{
95	&comment("");
96	&comment("Round $i");
97	&D_ENCRYPT(15-$i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
98	&comment("");
99	&comment("Round ".sprintf("%d",$i-1));
100	&D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
101	}
102
103	&set_label("end");
104
105	if ($do_ip)
106	{
107	&comment("");
108	&comment("FP");
109	&mov("edx",&wparam(0));
110	&FP_new($L,$R,"eax",3);
111
112	&mov(&DWP(0,"edx","",0),"eax");
113	&mov(&DWP(4,"edx","",0),$R);
114	}
115	else
116	{
117	&comment("");
118	&comment("Fixup");
119	&rotr($L,3); # r
120	&mov("eax",&wparam(0));
121	&rotr($R,3); # l
122	&mov(&DWP(0,"eax","",0),$L);
123	&mov(&DWP(4,"eax","",0),$R);
124	}
125
126	&pop("ebp");
127	&pop("ebx");
128	&pop("edi");
129	&pop("esi");
130	&ret();
131
132	&function_end_B($name);
133	}
134
135	sub D_ENCRYPT
136	{
137	local($r,$L,$R,$S,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_;
138
139	&mov( $u, &DWP(&n2a($S*4),$ks,"",0));
140	&xor( $tmp1, $tmp1);
141	&mov( $t, &DWP(&n2a(($S+1)*4),$ks,"",0));
142	&xor( $u, $R);
143	&xor( $t, $R);
144	&and( $u, "0xfcfcfcfc" );
145	&and( $t, "0xcfcfcfcf" );
146	&movb( &LB($tmp1), &LB($u) );
147	&movb( &LB($tmp2), &HB($u) );
148	&rotr( $t, 4 );
149	&mov( $ks, &DWP(" $desSP",$tmp1,"",0));
150	&movb( &LB($tmp1), &LB($t) );
151	&xor( $L, $ks);
152	&mov( $ks, &DWP("0x200+$desSP",$tmp2,"",0));
153	&xor( $L, $ks); ######
154	&movb( &LB($tmp2), &HB($t) );
155	&shr( $u, 16);
156	&mov( $ks, &DWP("0x100+$desSP",$tmp1,"",0));
157	&xor( $L, $ks); ######
158	&movb( &LB($tmp1), &HB($u) );
159	&shr( $t, 16);
160	&mov( $ks, &DWP("0x300+$desSP",$tmp2,"",0));
161	&xor( $L, $ks);
162	&mov( $ks, &wparam(1) );
163	&movb( &LB($tmp2), &HB($t) );
164	&and( $u, "0xff" );
165	&and( $t, "0xff" );
166	&mov( $tmp1, &DWP("0x600+$desSP",$tmp1,"",0));
167	&xor( $L, $tmp1);
168	&mov( $tmp1, &DWP("0x700+$desSP",$tmp2,"",0));
169	&xor( $L, $tmp1);
170	&mov( $tmp1, &DWP("0x400+$desSP",$u,"",0));
171	&xor( $L, $tmp1);
172	&mov( $tmp1, &DWP("0x500+$desSP",$t,"",0));
173	&xor( $L, $tmp1);
174	}
175
176	sub n2a
177	{
178	sprintf("%d",$_[0]);
179	}
180
181	# now has a side affect of rotating $a by $shift
182	sub R_PERM_OP
183	{
184	local($a,$b,$tt,$shift,$mask,$last)=@_;
185
186	&rotl( $a, $shift ) if ($shift != 0);
187	&mov( $tt, $a );
188	&xor( $a, $b );
189	&and( $a, $mask );
190	if (!$last eq $b)
191	{
192	&xor( $b, $a );
193	&xor( $tt, $a );
194	}
195	else
196	{
197	&xor( $tt, $a );
198	&xor( $b, $a );
199	}
200	&comment("");
201	}
202
203	sub IP_new
204	{
205	local($l,$r,$tt,$lr)=@_;
206
207	&R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
208	&R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
209	&R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
210	&R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
211	&R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
212
213	if ($lr != 3)
214	{
215	if (($lr-3) < 0)
216	{ &rotr($tt, 3-$lr); }
217	else { &rotl($tt, $lr-3); }
218	}
219	if ($lr != 2)
220	{
221	if (($lr-2) < 0)
222	{ &rotr($r, 2-$lr); }
223	else { &rotl($r, $lr-2); }
224	}
225	}
226
227	sub FP_new
228	{
229	local($l,$r,$tt,$lr)=@_;
230
231	if ($lr != 2)
232	{
233	if (($lr-2) < 0)
234	{ &rotl($r, 2-$lr); }
235	else { &rotr($r, $lr-2); }
236	}
237	if ($lr != 3)
238	{
239	if (($lr-3) < 0)
240	{ &rotl($l, 3-$lr); }
241	else { &rotr($l, $lr-3); }
242	}
243
244	&R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
245	&R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
246	&R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
247	&R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
248	&R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
249	&rotr($tt , 4);
250	}
251