1#!/usr/local/bin/perl
2
3# Normal is the
4# md5_block_x86(MD5_CTX *c, ULONG *X);
5# version, non-normal is the
6# md5_block_x86(MD5_CTX *c, ULONG *X,int blocks);
7
8$normal=0;
9
10push(@INC,"perlasm","../../perlasm");
11require "x86asm.pl";
12
13&asm_init($ARGV[0],$0);
14
15$A="eax";
16$B="ebx";
17$C="ecx";
18$D="edx";
19$tmp1="edi";
20$tmp2="ebp";
21$X="esi";
22
23# What we need to load into $tmp for the next round
24%Ltmp1=("R0",&Np($C), "R1",&Np($C), "R2",&Np($C), "R3",&Np($D));
25@xo=(
26 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,	# R0
27 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12,	# R1
28 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2,	# R2
29 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9,	# R3
30 );
31
32&md5_block("md5_block_asm_data_order");
33&asm_finish();
34
35sub Np
36	{
37	local($p)=@_;
38	local(%n)=($A,$D,$B,$A,$C,$B,$D,$C);
39	return($n{$p});
40	}
41
42sub R0
43	{
44	local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
45
46	&mov($tmp1,$C)  if $pos < 0;
47	&mov($tmp2,&DWP($xo[$ki]*4,$K,"",0)) if $pos < 0; # very first one
48
49	# body proper
50
51	&comment("R0 $ki");
52	&xor($tmp1,$d); # F function - part 2
53
54	&and($tmp1,$b); # F function - part 3
55	&lea($a,&DWP($t,$a,$tmp2,1));
56
57	&xor($tmp1,$d); # F function - part 4
58
59	&add($a,$tmp1);
60	&mov($tmp1,&Np($c)) if $pos < 1;	# next tmp1 for R0
61	&mov($tmp1,&Np($c)) if $pos == 1;	# next tmp1 for R1
62
63	&rotl($a,$s);
64
65	&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
66
67	&add($a,$b);
68	}
69
70sub R1
71	{
72	local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
73
74	&comment("R1 $ki");
75
76	&lea($a,&DWP($t,$a,$tmp2,1));
77
78	&xor($tmp1,$b); # G function - part 2
79	&and($tmp1,$d); # G function - part 3
80
81	&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
82	&xor($tmp1,$c);			# G function - part 4
83
84	&add($a,$tmp1);
85	&mov($tmp1,&Np($c)) if $pos < 1;	# G function - part 1
86	&mov($tmp1,&Np($c)) if $pos == 1;	# G function - part 1
87
88	&rotl($a,$s);
89
90	&add($a,$b);
91	}
92
93sub R2
94	{
95	local($n,$pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
96	# This one is different, only 3 logical operations
97
98if (($n & 1) == 0)
99	{
100	&comment("R2 $ki");
101	# make sure to do 'D' first, not 'B', else we clash with
102	# the last add from the previous round.
103
104	&xor($tmp1,$d); # H function - part 2
105
106	&xor($tmp1,$b); # H function - part 3
107	&lea($a,&DWP($t,$a,$tmp2,1));
108
109	&add($a,$tmp1);
110
111	&rotl($a,$s);
112
113	&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0));
114	&mov($tmp1,&Np($c));
115	}
116else
117	{
118	&comment("R2 $ki");
119	# make sure to do 'D' first, not 'B', else we clash with
120	# the last add from the previous round.
121
122	&lea($a,&DWP($t,$a,$tmp2,1));
123
124	&add($b,$c);			# MOVED FORWARD
125	&xor($tmp1,$d); # H function - part 2
126
127	&xor($tmp1,$b); # H function - part 3
128	&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
129
130	&add($a,$tmp1);
131	&mov($tmp1,&Np($c)) if $pos < 1;	# H function - part 1
132	&mov($tmp1,-1) if $pos == 1;		# I function - part 1
133
134	&rotl($a,$s);
135
136	&add($a,$b);
137	}
138	}
139
140sub R3
141	{
142	local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
143
144	&comment("R3 $ki");
145
146	# &not($tmp1)
147	&xor($tmp1,$d) if $pos < 0; 	# I function - part 2
148
149	&or($tmp1,$b);				# I function - part 3
150	&lea($a,&DWP($t,$a,$tmp2,1));
151
152	&xor($tmp1,$c); 			# I function - part 4
153	&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0))	if $pos != 2; # load X/k value
154	&mov($tmp2,&wparam(0)) if $pos == 2;
155
156	&add($a,$tmp1);
157	&mov($tmp1,-1) if $pos < 1;	# H function - part 1
158	&add($K,64) if $pos >=1 && !$normal;
159
160	&rotl($a,$s);
161
162	&xor($tmp1,&Np($d)) if $pos <= 0; 	# I function - part = first time
163	&mov($tmp1,&DWP( 0,$tmp2,"",0)) if $pos > 0;
164	&add($a,$b);
165	}
166
167
168sub md5_block
169	{
170	local($name)=@_;
171
172	&function_begin_B($name,"",3);
173
174	# parameter 1 is the MD5_CTX structure.
175	# A	0
176	# B	4
177	# C	8
178	# D 	12
179
180	&push("esi");
181	 &push("edi");
182	&mov($tmp1,	&wparam(0)); # edi
183	 &mov($X,	&wparam(1)); # esi
184	&mov($C,	&wparam(2));
185	 &push("ebp");
186	&shl($C,	6);
187	&push("ebx");
188	 &add($C,	$X); # offset we end at
189	&sub($C,	64);
190	 &mov($A,	&DWP( 0,$tmp1,"",0));
191	&push($C);	# Put on the TOS
192	 &mov($B,	&DWP( 4,$tmp1,"",0));
193	&mov($C,	&DWP( 8,$tmp1,"",0));
194	 &mov($D,	&DWP(12,$tmp1,"",0));
195
196	&set_label("start") unless $normal;
197	&comment("");
198	&comment("R0 section");
199
200	&R0(-2,$A,$B,$C,$D,$X, 0, 7,0xd76aa478);
201	&R0( 0,$D,$A,$B,$C,$X, 1,12,0xe8c7b756);
202	&R0( 0,$C,$D,$A,$B,$X, 2,17,0x242070db);
203	&R0( 0,$B,$C,$D,$A,$X, 3,22,0xc1bdceee);
204	&R0( 0,$A,$B,$C,$D,$X, 4, 7,0xf57c0faf);
205	&R0( 0,$D,$A,$B,$C,$X, 5,12,0x4787c62a);
206	&R0( 0,$C,$D,$A,$B,$X, 6,17,0xa8304613);
207	&R0( 0,$B,$C,$D,$A,$X, 7,22,0xfd469501);
208	&R0( 0,$A,$B,$C,$D,$X, 8, 7,0x698098d8);
209	&R0( 0,$D,$A,$B,$C,$X, 9,12,0x8b44f7af);
210	&R0( 0,$C,$D,$A,$B,$X,10,17,0xffff5bb1);
211	&R0( 0,$B,$C,$D,$A,$X,11,22,0x895cd7be);
212	&R0( 0,$A,$B,$C,$D,$X,12, 7,0x6b901122);
213	&R0( 0,$D,$A,$B,$C,$X,13,12,0xfd987193);
214	&R0( 0,$C,$D,$A,$B,$X,14,17,0xa679438e);
215	&R0( 1,$B,$C,$D,$A,$X,15,22,0x49b40821);
216
217	&comment("");
218	&comment("R1 section");
219	&R1(-1,$A,$B,$C,$D,$X,16, 5,0xf61e2562);
220	&R1( 0,$D,$A,$B,$C,$X,17, 9,0xc040b340);
221	&R1( 0,$C,$D,$A,$B,$X,18,14,0x265e5a51);
222	&R1( 0,$B,$C,$D,$A,$X,19,20,0xe9b6c7aa);
223	&R1( 0,$A,$B,$C,$D,$X,20, 5,0xd62f105d);
224	&R1( 0,$D,$A,$B,$C,$X,21, 9,0x02441453);
225	&R1( 0,$C,$D,$A,$B,$X,22,14,0xd8a1e681);
226	&R1( 0,$B,$C,$D,$A,$X,23,20,0xe7d3fbc8);
227	&R1( 0,$A,$B,$C,$D,$X,24, 5,0x21e1cde6);
228	&R1( 0,$D,$A,$B,$C,$X,25, 9,0xc33707d6);
229	&R1( 0,$C,$D,$A,$B,$X,26,14,0xf4d50d87);
230	&R1( 0,$B,$C,$D,$A,$X,27,20,0x455a14ed);
231	&R1( 0,$A,$B,$C,$D,$X,28, 5,0xa9e3e905);
232	&R1( 0,$D,$A,$B,$C,$X,29, 9,0xfcefa3f8);
233	&R1( 0,$C,$D,$A,$B,$X,30,14,0x676f02d9);
234	&R1( 1,$B,$C,$D,$A,$X,31,20,0x8d2a4c8a);
235
236	&comment("");
237	&comment("R2 section");
238	&R2( 0,-1,$A,$B,$C,$D,$X,32, 4,0xfffa3942);
239	&R2( 1, 0,$D,$A,$B,$C,$X,33,11,0x8771f681);
240	&R2( 2, 0,$C,$D,$A,$B,$X,34,16,0x6d9d6122);
241	&R2( 3, 0,$B,$C,$D,$A,$X,35,23,0xfde5380c);
242	&R2( 4, 0,$A,$B,$C,$D,$X,36, 4,0xa4beea44);
243	&R2( 5, 0,$D,$A,$B,$C,$X,37,11,0x4bdecfa9);
244	&R2( 6, 0,$C,$D,$A,$B,$X,38,16,0xf6bb4b60);
245	&R2( 7, 0,$B,$C,$D,$A,$X,39,23,0xbebfbc70);
246	&R2( 8, 0,$A,$B,$C,$D,$X,40, 4,0x289b7ec6);
247	&R2( 9, 0,$D,$A,$B,$C,$X,41,11,0xeaa127fa);
248	&R2(10, 0,$C,$D,$A,$B,$X,42,16,0xd4ef3085);
249	&R2(11, 0,$B,$C,$D,$A,$X,43,23,0x04881d05);
250	&R2(12, 0,$A,$B,$C,$D,$X,44, 4,0xd9d4d039);
251	&R2(13, 0,$D,$A,$B,$C,$X,45,11,0xe6db99e5);
252	&R2(14, 0,$C,$D,$A,$B,$X,46,16,0x1fa27cf8);
253	&R2(15, 1,$B,$C,$D,$A,$X,47,23,0xc4ac5665);
254
255	&comment("");
256	&comment("R3 section");
257	&R3(-1,$A,$B,$C,$D,$X,48, 6,0xf4292244);
258	&R3( 0,$D,$A,$B,$C,$X,49,10,0x432aff97);
259	&R3( 0,$C,$D,$A,$B,$X,50,15,0xab9423a7);
260	&R3( 0,$B,$C,$D,$A,$X,51,21,0xfc93a039);
261	&R3( 0,$A,$B,$C,$D,$X,52, 6,0x655b59c3);
262	&R3( 0,$D,$A,$B,$C,$X,53,10,0x8f0ccc92);
263	&R3( 0,$C,$D,$A,$B,$X,54,15,0xffeff47d);
264	&R3( 0,$B,$C,$D,$A,$X,55,21,0x85845dd1);
265	&R3( 0,$A,$B,$C,$D,$X,56, 6,0x6fa87e4f);
266	&R3( 0,$D,$A,$B,$C,$X,57,10,0xfe2ce6e0);
267	&R3( 0,$C,$D,$A,$B,$X,58,15,0xa3014314);
268	&R3( 0,$B,$C,$D,$A,$X,59,21,0x4e0811a1);
269	&R3( 0,$A,$B,$C,$D,$X,60, 6,0xf7537e82);
270	&R3( 0,$D,$A,$B,$C,$X,61,10,0xbd3af235);
271	&R3( 0,$C,$D,$A,$B,$X,62,15,0x2ad7d2bb);
272	&R3( 2,$B,$C,$D,$A,$X,63,21,0xeb86d391);
273
274	# &mov($tmp2,&wparam(0));	# done in the last R3
275	# &mov($tmp1,	&DWP( 0,$tmp2,"",0)); # done is the last R3
276
277	&add($A,$tmp1);
278	 &mov($tmp1,	&DWP( 4,$tmp2,"",0));
279
280	&add($B,$tmp1);
281	&mov($tmp1,	&DWP( 8,$tmp2,"",0));
282
283	&add($C,$tmp1);
284	&mov($tmp1,	&DWP(12,$tmp2,"",0));
285
286	&add($D,$tmp1);
287	&mov(&DWP( 0,$tmp2,"",0),$A);
288
289	&mov(&DWP( 4,$tmp2,"",0),$B);
290	&mov($tmp1,&swtmp(0)) unless $normal;
291
292	&mov(&DWP( 8,$tmp2,"",0),$C);
293	 &mov(&DWP(12,$tmp2,"",0),$D);
294
295	&cmp($tmp1,$X) unless $normal;			# check count
296	 &jae(&label("start")) unless $normal;
297
298	&pop("eax"); # pop the temp variable off the stack
299	 &pop("ebx");
300	&pop("ebp");
301	 &pop("edi");
302	&pop("esi");
303	 &ret();
304	&function_end_B($name);
305	}
306
307