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