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1#!/usr/bin/env perl
2#
3# ====================================================================
4# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
5# project. Rights for redistribution and usage in source and binary
6# forms are granted according to the OpenSSL license.
7# ====================================================================
8#
9# Version 3.6.
10#
11# You might fail to appreciate this module performance from the first
12# try. If compared to "vanilla" linux-ia32-icc target, i.e. considered
13# to be *the* best Intel C compiler without -KPIC, performance appears
14# to be virtually identical... But try to re-configure with shared
15# library support... Aha! Intel compiler "suddenly" lags behind by 30%
16# [on P4, more on others]:-) And if compared to position-independent
17# code generated by GNU C, this code performs *more* than *twice* as
18# fast! Yes, all this buzz about PIC means that unlike other hand-
19# coded implementations, this one was explicitly designed to be safe
20# to use even in shared library context... This also means that this
21# code isn't necessarily absolutely fastest "ever," because in order
22# to achieve position independence an extra register has to be
23# off-loaded to stack, which affects the benchmark result.
24#
25# Special note about instruction choice. Do you recall RC4_INT code
26# performing poorly on P4? It might be the time to figure out why.
27# RC4_INT code implies effective address calculations in base+offset*4
28# form. Trouble is that it seems that offset scaling turned to be
29# critical path... At least eliminating scaling resulted in 2.8x RC4
30# performance improvement [as you might recall]. As AES code is hungry
31# for scaling too, I [try to] avoid the latter by favoring off-by-2
32# shifts and masking the result with 0xFF<<2 instead of "boring" 0xFF.
33#
34# As was shown by Dean Gaudet <dean@arctic.org>, the above note turned
35# void. Performance improvement with off-by-2 shifts was observed on
36# intermediate implementation, which was spilling yet another register
37# to stack... Final offset*4 code below runs just a tad faster on P4,
38# but exhibits up to 10% improvement on other cores.
39#
40# Second version is "monolithic" replacement for aes_core.c, which in
41# addition to AES_[de|en]crypt implements AES_set_[de|en]cryption_key.
42# This made it possible to implement little-endian variant of the
43# algorithm without modifying the base C code. Motivating factor for
44# the undertaken effort was that it appeared that in tight IA-32
45# register window little-endian flavor could achieve slightly higher
46# Instruction Level Parallelism, and it indeed resulted in up to 15%
47# better performance on most recent µ-archs...
48#
49# Third version adds AES_cbc_encrypt implementation, which resulted in
50# up to 40% performance imrovement of CBC benchmark results. 40% was
51# observed on P4 core, where "overall" imrovement coefficient, i.e. if
52# compared to PIC generated by GCC and in CBC mode, was observed to be
53# as large as 4x:-) CBC performance is virtually identical to ECB now
54# and on some platforms even better, e.g. 17.6 "small" cycles/byte on
55# Opteron, because certain function prologues and epilogues are
56# effectively taken out of the loop...
57#
58# Version 3.2 implements compressed tables and prefetch of these tables
59# in CBC[!] mode. Former means that 3/4 of table references are now
60# misaligned, which unfortunately has negative impact on elder IA-32
61# implementations, Pentium suffered 30% penalty, PIII - 10%.
62#
63# Version 3.3 avoids L1 cache aliasing between stack frame and
64# S-boxes, and 3.4 - L1 cache aliasing even between key schedule. The
65# latter is achieved by copying the key schedule to controlled place in
66# stack. This unfortunately has rather strong impact on small block CBC
67# performance, ~2x deterioration on 16-byte block if compared to 3.3.
68#
69# Version 3.5 checks if there is L1 cache aliasing between user-supplied
70# key schedule and S-boxes and abstains from copying the former if
71# there is no. This allows end-user to consciously retain small block
72# performance by aligning key schedule in specific manner.
73#
74# Version 3.6 compresses Td4 to 256 bytes and prefetches it in ECB.
75#
76# Current ECB performance numbers for 128-bit key in CPU cycles per
77# processed byte [measure commonly used by AES benchmarkers] are:
78#
79# small footprint fully unrolled
80# P4 24 22
81# AMD K8 20 19
82# PIII 25 23
83# Pentium 81 78
84
85push(@INC,"perlasm","../../perlasm");
86require "x86asm.pl";
87
88&asm_init($ARGV[0],"aes-586.pl",$ARGV[$#ARGV] eq "386");
89
90$s0="eax";
91$s1="ebx";
92$s2="ecx";
93$s3="edx";
94$key="edi";
95$acc="esi";
96
97$compromise=0; # $compromise=128 abstains from copying key
98 # schedule to stack when encrypting inputs
99 # shorter than 128 bytes at the cost of
100 # risksing aliasing with S-boxes. In return
101 # you get way better, up to +70%, small block
102 # performance.
103$small_footprint=1; # $small_footprint=1 code is ~5% slower [on
104 # recent µ-archs], but ~5 times smaller!
105 # I favor compact code to minimize cache
106 # contention and in hope to "collect" 5% back
107 # in real-life applications...
108$vertical_spin=0; # shift "verticaly" defaults to 0, because of
109 # its proof-of-concept status...
110
111# Note that there is no decvert(), as well as last encryption round is
112# performed with "horizontal" shifts. This is because this "vertical"
113# implementation [one which groups shifts on a given $s[i] to form a
114# "column," unlike "horizontal" one, which groups shifts on different
115# $s[i] to form a "row"] is work in progress. It was observed to run
116# few percents faster on Intel cores, but not AMD. On AMD K8 core it's
117# whole 12% slower:-( So we face a trade-off... Shall it be resolved
118# some day? Till then the code is considered experimental and by
119# default remains dormant...
120
121sub encvert()
122{ my ($te,@s) = @_;
123 my $v0 = $acc, $v1 = $key;
124
125 &mov ($v0,$s[3]); # copy s3
126 &mov (&DWP(4,"esp"),$s[2]); # save s2
127 &mov ($v1,$s[0]); # copy s0
128 &mov (&DWP(8,"esp"),$s[1]); # save s1
129
130 &movz ($s[2],&HB($s[0]));
131 &and ($s[0],0xFF);
132 &mov ($s[0],&DWP(0,$te,$s[0],8)); # s0>>0
133 &shr ($v1,16);
134 &mov ($s[3],&DWP(3,$te,$s[2],8)); # s0>>8
135 &movz ($s[1],&HB($v1));
136 &and ($v1,0xFF);
137 &mov ($s[2],&DWP(2,$te,$v1,8)); # s0>>16
138 &mov ($v1,$v0);
139 &mov ($s[1],&DWP(1,$te,$s[1],8)); # s0>>24
140
141 &and ($v0,0xFF);
142 &xor ($s[3],&DWP(0,$te,$v0,8)); # s3>>0
143 &movz ($v0,&HB($v1));
144 &shr ($v1,16);
145 &xor ($s[2],&DWP(3,$te,$v0,8)); # s3>>8
146 &movz ($v0,&HB($v1));
147 &and ($v1,0xFF);
148 &xor ($s[1],&DWP(2,$te,$v1,8)); # s3>>16
149 &mov ($v1,&DWP(4,"esp")); # restore s2
150 &xor ($s[0],&DWP(1,$te,$v0,8)); # s3>>24
151
152 &mov ($v0,$v1);
153 &and ($v1,0xFF);
154 &xor ($s[2],&DWP(0,$te,$v1,8)); # s2>>0
155 &movz ($v1,&HB($v0));
156 &shr ($v0,16);
157 &xor ($s[1],&DWP(3,$te,$v1,8)); # s2>>8
158 &movz ($v1,&HB($v0));
159 &and ($v0,0xFF);
160 &xor ($s[0],&DWP(2,$te,$v0,8)); # s2>>16
161 &mov ($v0,&DWP(8,"esp")); # restore s1
162 &xor ($s[3],&DWP(1,$te,$v1,8)); # s2>>24
163
164 &mov ($v1,$v0);
165 &and ($v0,0xFF);
166 &xor ($s[1],&DWP(0,$te,$v0,8)); # s1>>0
167 &movz ($v0,&HB($v1));
168 &shr ($v1,16);
169 &xor ($s[0],&DWP(3,$te,$v0,8)); # s1>>8
170 &movz ($v0,&HB($v1));
171 &and ($v1,0xFF);
172 &xor ($s[3],&DWP(2,$te,$v1,8)); # s1>>16
173 &mov ($key,&DWP(12,"esp")); # reincarnate v1 as key
174 &xor ($s[2],&DWP(1,$te,$v0,8)); # s1>>24
175}
176
177sub encstep()
178{ my ($i,$te,@s) = @_;
179 my $tmp = $key;
180 my $out = $i==3?$s[0]:$acc;
181
182 # lines marked with #%e?x[i] denote "reordered" instructions...
183 if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx
184 else { &mov ($out,$s[0]);
185 &and ($out,0xFF); }
186 if ($i==1) { &shr ($s[0],16); }#%ebx[1]
187 if ($i==2) { &shr ($s[0],24); }#%ecx[2]
188 &mov ($out,&DWP(0,$te,$out,8));
189
190 if ($i==3) { $tmp=$s[1]; }##%eax
191 &movz ($tmp,&HB($s[1]));
192 &xor ($out,&DWP(3,$te,$tmp,8));
193
194 if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx
195 else { &mov ($tmp,$s[2]);
196 &shr ($tmp,16); }
197 if ($i==2) { &and ($s[1],0xFF); }#%edx[2]
198 &and ($tmp,0xFF);
199 &xor ($out,&DWP(2,$te,$tmp,8));
200
201 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx
202 elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2]
203 else { &mov ($tmp,$s[3]);
204 &shr ($tmp,24) }
205 &xor ($out,&DWP(1,$te,$tmp,8));
206 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
207 if ($i==3) { &mov ($s[3],$acc); }
208 &comment();
209}
210
211sub enclast()
212{ my ($i,$te,@s)=@_;
213 my $tmp = $key;
214 my $out = $i==3?$s[0]:$acc;
215
216 if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx
217 else { &mov ($out,$s[0]); }
218 &and ($out,0xFF);
219 if ($i==1) { &shr ($s[0],16); }#%ebx[1]
220 if ($i==2) { &shr ($s[0],24); }#%ecx[2]
221 &mov ($out,&DWP(2,$te,$out,8));
222 &and ($out,0x000000ff);
223
224 if ($i==3) { $tmp=$s[1]; }##%eax
225 &movz ($tmp,&HB($s[1]));
226 &mov ($tmp,&DWP(0,$te,$tmp,8));
227 &and ($tmp,0x0000ff00);
228 &xor ($out,$tmp);
229
230 if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx
231 else { mov ($tmp,$s[2]);
232 &shr ($tmp,16); }
233 if ($i==2) { &and ($s[1],0xFF); }#%edx[2]
234 &and ($tmp,0xFF);
235 &mov ($tmp,&DWP(0,$te,$tmp,8));
236 &and ($tmp,0x00ff0000);
237 &xor ($out,$tmp);
238
239 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx
240 elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2]
241 else { &mov ($tmp,$s[3]);
242 &shr ($tmp,24); }
243 &mov ($tmp,&DWP(2,$te,$tmp,8));
244 &and ($tmp,0xff000000);
245 &xor ($out,$tmp);
246 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
247 if ($i==3) { &mov ($s[3],$acc); }
248}
249
250sub _data_word() { my $i; while(defined($i=shift)) { &data_word($i,$i); } }
251
252&public_label("AES_Te");
253&function_begin_C("_x86_AES_encrypt");
254 if ($vertical_spin) {
255 # I need high parts of volatile registers to be accessible...
256 &exch ($s1="edi",$key="ebx");
257 &mov ($s2="esi",$acc="ecx");
258 }
259
260 # note that caller is expected to allocate stack frame for me!
261 &mov (&DWP(12,"esp"),$key); # save key
262
263 &xor ($s0,&DWP(0,$key)); # xor with key
264 &xor ($s1,&DWP(4,$key));
265 &xor ($s2,&DWP(8,$key));
266 &xor ($s3,&DWP(12,$key));
267
268 &mov ($acc,&DWP(240,$key)); # load key->rounds
269
270 if ($small_footprint) {
271 &lea ($acc,&DWP(-2,$acc,$acc));
272 &lea ($acc,&DWP(0,$key,$acc,8));
273 &mov (&DWP(16,"esp"),$acc); # end of key schedule
274 &align (4);
275 &set_label("loop");
276 if ($vertical_spin) {
277 &encvert("ebp",$s0,$s1,$s2,$s3);
278 } else {
279 &encstep(0,"ebp",$s0,$s1,$s2,$s3);
280 &encstep(1,"ebp",$s1,$s2,$s3,$s0);
281 &encstep(2,"ebp",$s2,$s3,$s0,$s1);
282 &encstep(3,"ebp",$s3,$s0,$s1,$s2);
283 }
284 &add ($key,16); # advance rd_key
285 &xor ($s0,&DWP(0,$key));
286 &xor ($s1,&DWP(4,$key));
287 &xor ($s2,&DWP(8,$key));
288 &xor ($s3,&DWP(12,$key));
289 &cmp ($key,&DWP(16,"esp"));
290 &mov (&DWP(12,"esp"),$key);
291 &jb (&label("loop"));
292 }
293 else {
294 &cmp ($acc,10);
295 &jle (&label("10rounds"));
296 &cmp ($acc,12);
297 &jle (&label("12rounds"));
298
299 &set_label("14rounds");
300 for ($i=1;$i<3;$i++) {
301 if ($vertical_spin) {
302 &encvert("ebp",$s0,$s1,$s2,$s3);
303 } else {
304 &encstep(0,"ebp",$s0,$s1,$s2,$s3);
305 &encstep(1,"ebp",$s1,$s2,$s3,$s0);
306 &encstep(2,"ebp",$s2,$s3,$s0,$s1);
307 &encstep(3,"ebp",$s3,$s0,$s1,$s2);
308 }
309 &xor ($s0,&DWP(16*$i+0,$key));
310 &xor ($s1,&DWP(16*$i+4,$key));
311 &xor ($s2,&DWP(16*$i+8,$key));
312 &xor ($s3,&DWP(16*$i+12,$key));
313 }
314 &add ($key,32);
315 &mov (&DWP(12,"esp"),$key); # advance rd_key
316 &set_label("12rounds");
317 for ($i=1;$i<3;$i++) {
318 if ($vertical_spin) {
319 &encvert("ebp",$s0,$s1,$s2,$s3);
320 } else {
321 &encstep(0,"ebp",$s0,$s1,$s2,$s3);
322 &encstep(1,"ebp",$s1,$s2,$s3,$s0);
323 &encstep(2,"ebp",$s2,$s3,$s0,$s1);
324 &encstep(3,"ebp",$s3,$s0,$s1,$s2);
325 }
326 &xor ($s0,&DWP(16*$i+0,$key));
327 &xor ($s1,&DWP(16*$i+4,$key));
328 &xor ($s2,&DWP(16*$i+8,$key));
329 &xor ($s3,&DWP(16*$i+12,$key));
330 }
331 &add ($key,32);
332 &mov (&DWP(12,"esp"),$key); # advance rd_key
333 &set_label("10rounds");
334 for ($i=1;$i<10;$i++) {
335 if ($vertical_spin) {
336 &encvert("ebp",$s0,$s1,$s2,$s3);
337 } else {
338 &encstep(0,"ebp",$s0,$s1,$s2,$s3);
339 &encstep(1,"ebp",$s1,$s2,$s3,$s0);
340 &encstep(2,"ebp",$s2,$s3,$s0,$s1);
341 &encstep(3,"ebp",$s3,$s0,$s1,$s2);
342 }
343 &xor ($s0,&DWP(16*$i+0,$key));
344 &xor ($s1,&DWP(16*$i+4,$key));
345 &xor ($s2,&DWP(16*$i+8,$key));
346 &xor ($s3,&DWP(16*$i+12,$key));
347 }
348 }
349
350 if ($vertical_spin) {
351 # "reincarnate" some registers for "horizontal" spin...
352 &mov ($s1="ebx",$key="edi");
353 &mov ($s2="ecx",$acc="esi");
354 }
355 &enclast(0,"ebp",$s0,$s1,$s2,$s3);
356 &enclast(1,"ebp",$s1,$s2,$s3,$s0);
357 &enclast(2,"ebp",$s2,$s3,$s0,$s1);
358 &enclast(3,"ebp",$s3,$s0,$s1,$s2);
359
360 &add ($key,$small_footprint?16:160);
361 &xor ($s0,&DWP(0,$key));
362 &xor ($s1,&DWP(4,$key));
363 &xor ($s2,&DWP(8,$key));
364 &xor ($s3,&DWP(12,$key));
365
366 &ret ();
367
368&set_label("AES_Te",64); # Yes! I keep it in the code segment!
369 &_data_word(0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6);
370 &_data_word(0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591);
371 &_data_word(0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56);
372 &_data_word(0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec);
373 &_data_word(0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa);
374 &_data_word(0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb);
375 &_data_word(0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45);
376 &_data_word(0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b);
377 &_data_word(0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c);
378 &_data_word(0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83);
379 &_data_word(0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9);
380 &_data_word(0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a);
381 &_data_word(0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d);
382 &_data_word(0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f);
383 &_data_word(0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df);
384 &_data_word(0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea);
385 &_data_word(0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34);
386 &_data_word(0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b);
387 &_data_word(0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d);
388 &_data_word(0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413);
389 &_data_word(0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1);
390 &_data_word(0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6);
391 &_data_word(0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972);
392 &_data_word(0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85);
393 &_data_word(0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed);
394 &_data_word(0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511);
395 &_data_word(0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe);
396 &_data_word(0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b);
397 &_data_word(0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05);
398 &_data_word(0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1);
399 &_data_word(0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142);
400 &_data_word(0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf);
401 &_data_word(0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3);
402 &_data_word(0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e);
403 &_data_word(0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a);
404 &_data_word(0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6);
405 &_data_word(0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3);
406 &_data_word(0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b);
407 &_data_word(0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428);
408 &_data_word(0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad);
409 &_data_word(0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14);
410 &_data_word(0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8);
411 &_data_word(0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4);
412 &_data_word(0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2);
413 &_data_word(0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda);
414 &_data_word(0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949);
415 &_data_word(0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf);
416 &_data_word(0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810);
417 &_data_word(0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c);
418 &_data_word(0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697);
419 &_data_word(0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e);
420 &_data_word(0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f);
421 &_data_word(0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc);
422 &_data_word(0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c);
423 &_data_word(0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969);
424 &_data_word(0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27);
425 &_data_word(0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122);
426 &_data_word(0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433);
427 &_data_word(0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9);
428 &_data_word(0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5);
429 &_data_word(0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a);
430 &_data_word(0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0);
431 &_data_word(0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e);
432 &_data_word(0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c);
433#rcon:
434 &data_word(0x00000001, 0x00000002, 0x00000004, 0x00000008);
435 &data_word(0x00000010, 0x00000020, 0x00000040, 0x00000080);
436 &data_word(0x0000001b, 0x00000036, 0, 0, 0, 0, 0, 0);
437&function_end_B("_x86_AES_encrypt");
438
439# void AES_encrypt (const void *inp,void *out,const AES_KEY *key);
440&public_label("AES_Te");
441&function_begin("AES_encrypt");
442 &mov ($acc,&wparam(0)); # load inp
443 &mov ($key,&wparam(2)); # load key
444
445 &mov ($s0,"esp");
446 &sub ("esp",24);
447 &and ("esp",-64);
448 &add ("esp",4);
449 &mov (&DWP(16,"esp"),$s0);
450
451 &call (&label("pic_point")); # make it PIC!
452 &set_label("pic_point");
453 &blindpop("ebp");
454 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
455
456 &mov ($s0,&DWP(0,$acc)); # load input data
457 &mov ($s1,&DWP(4,$acc));
458 &mov ($s2,&DWP(8,$acc));
459 &mov ($s3,&DWP(12,$acc));
460
461 &call ("_x86_AES_encrypt");
462
463 &mov ("esp",&DWP(16,"esp"));
464
465 &mov ($acc,&wparam(1)); # load out
466 &mov (&DWP(0,$acc),$s0); # write output data
467 &mov (&DWP(4,$acc),$s1);
468 &mov (&DWP(8,$acc),$s2);
469 &mov (&DWP(12,$acc),$s3);
470&function_end("AES_encrypt");
471
472#------------------------------------------------------------------#
473
474sub decstep()
475{ my ($i,$td,@s) = @_;
476 my $tmp = $key;
477 my $out = $i==3?$s[0]:$acc;
478
479 # no instructions are reordered, as performance appears
480 # optimal... or rather that all attempts to reorder didn't
481 # result in better performance [which by the way is not a
482 # bit lower than ecryption].
483 if($i==3) { &mov ($key,&DWP(12,"esp")); }
484 else { &mov ($out,$s[0]); }
485 &and ($out,0xFF);
486 &mov ($out,&DWP(0,$td,$out,8));
487
488 if ($i==3) { $tmp=$s[1]; }
489 &movz ($tmp,&HB($s[1]));
490 &xor ($out,&DWP(3,$td,$tmp,8));
491
492 if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); }
493 else { &mov ($tmp,$s[2]); }
494 &shr ($tmp,16);
495 &and ($tmp,0xFF);
496 &xor ($out,&DWP(2,$td,$tmp,8));
497
498 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }
499 else { &mov ($tmp,$s[3]); }
500 &shr ($tmp,24);
501 &xor ($out,&DWP(1,$td,$tmp,8));
502 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
503 if ($i==3) { &mov ($s[3],&DWP(4,"esp")); }
504 &comment();
505}
506
507sub declast()
508{ my ($i,$td,@s)=@_;
509 my $tmp = $key;
510 my $out = $i==3?$s[0]:$acc;
511
512 if($i==3) { &mov ($key,&DWP(12,"esp")); }
513 else { &mov ($out,$s[0]); }
514 &and ($out,0xFF);
515 &movz ($out,&BP(2048,$td,$out,1));
516
517 if ($i==3) { $tmp=$s[1]; }
518 &movz ($tmp,&HB($s[1]));
519 &movz ($tmp,&BP(2048,$td,$tmp,1));
520 &shl ($tmp,8);
521 &xor ($out,$tmp);
522
523 if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); }
524 else { mov ($tmp,$s[2]); }
525 &shr ($tmp,16);
526 &and ($tmp,0xFF);
527 &movz ($tmp,&BP(2048,$td,$tmp,1));
528 &shl ($tmp,16);
529 &xor ($out,$tmp);
530
531 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }
532 else { &mov ($tmp,$s[3]); }
533 &shr ($tmp,24);
534 &movz ($tmp,&BP(2048,$td,$tmp,1));
535 &shl ($tmp,24);
536 &xor ($out,$tmp);
537 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
538 if ($i==3) { &mov ($s[3],&DWP(4,"esp")); }
539}
540
541&public_label("AES_Td");
542&function_begin_C("_x86_AES_decrypt");
543 # note that caller is expected to allocate stack frame for me!
544 &mov (&DWP(12,"esp"),$key); # save key
545
546 &xor ($s0,&DWP(0,$key)); # xor with key
547 &xor ($s1,&DWP(4,$key));
548 &xor ($s2,&DWP(8,$key));
549 &xor ($s3,&DWP(12,$key));
550
551 &mov ($acc,&DWP(240,$key)); # load key->rounds
552
553 if ($small_footprint) {
554 &lea ($acc,&DWP(-2,$acc,$acc));
555 &lea ($acc,&DWP(0,$key,$acc,8));
556 &mov (&DWP(16,"esp"),$acc); # end of key schedule
557 &align (4);
558 &set_label("loop");
559 &decstep(0,"ebp",$s0,$s3,$s2,$s1);
560 &decstep(1,"ebp",$s1,$s0,$s3,$s2);
561 &decstep(2,"ebp",$s2,$s1,$s0,$s3);
562 &decstep(3,"ebp",$s3,$s2,$s1,$s0);
563 &add ($key,16); # advance rd_key
564 &xor ($s0,&DWP(0,$key));
565 &xor ($s1,&DWP(4,$key));
566 &xor ($s2,&DWP(8,$key));
567 &xor ($s3,&DWP(12,$key));
568 &cmp ($key,&DWP(16,"esp"));
569 &mov (&DWP(12,"esp"),$key);
570 &jb (&label("loop"));
571 }
572 else {
573 &cmp ($acc,10);
574 &jle (&label("10rounds"));
575 &cmp ($acc,12);
576 &jle (&label("12rounds"));
577
578 &set_label("14rounds");
579 for ($i=1;$i<3;$i++) {
580 &decstep(0,"ebp",$s0,$s3,$s2,$s1);
581 &decstep(1,"ebp",$s1,$s0,$s3,$s2);
582 &decstep(2,"ebp",$s2,$s1,$s0,$s3);
583 &decstep(3,"ebp",$s3,$s2,$s1,$s0);
584 &xor ($s0,&DWP(16*$i+0,$key));
585 &xor ($s1,&DWP(16*$i+4,$key));
586 &xor ($s2,&DWP(16*$i+8,$key));
587 &xor ($s3,&DWP(16*$i+12,$key));
588 }
589 &add ($key,32);
590 &mov (&DWP(12,"esp"),$key); # advance rd_key
591 &set_label("12rounds");
592 for ($i=1;$i<3;$i++) {
593 &decstep(0,"ebp",$s0,$s3,$s2,$s1);
594 &decstep(1,"ebp",$s1,$s0,$s3,$s2);
595 &decstep(2,"ebp",$s2,$s1,$s0,$s3);
596 &decstep(3,"ebp",$s3,$s2,$s1,$s0);
597 &xor ($s0,&DWP(16*$i+0,$key));
598 &xor ($s1,&DWP(16*$i+4,$key));
599 &xor ($s2,&DWP(16*$i+8,$key));
600 &xor ($s3,&DWP(16*$i+12,$key));
601 }
602 &add ($key,32);
603 &mov (&DWP(12,"esp"),$key); # advance rd_key
604 &set_label("10rounds");
605 for ($i=1;$i<10;$i++) {
606 &decstep(0,"ebp",$s0,$s3,$s2,$s1);
607 &decstep(1,"ebp",$s1,$s0,$s3,$s2);
608 &decstep(2,"ebp",$s2,$s1,$s0,$s3);
609 &decstep(3,"ebp",$s3,$s2,$s1,$s0);
610 &xor ($s0,&DWP(16*$i+0,$key));
611 &xor ($s1,&DWP(16*$i+4,$key));
612 &xor ($s2,&DWP(16*$i+8,$key));
613 &xor ($s3,&DWP(16*$i+12,$key));
614 }
615 }
616
617 &declast(0,"ebp",$s0,$s3,$s2,$s1);
618 &declast(1,"ebp",$s1,$s0,$s3,$s2);
619 &declast(2,"ebp",$s2,$s1,$s0,$s3);
620 &declast(3,"ebp",$s3,$s2,$s1,$s0);
621
622 &add ($key,$small_footprint?16:160);
623 &xor ($s0,&DWP(0,$key));
624 &xor ($s1,&DWP(4,$key));
625 &xor ($s2,&DWP(8,$key));
626 &xor ($s3,&DWP(12,$key));
627
628 &ret ();
629
630&set_label("AES_Td",64); # Yes! I keep it in the code segment!
631 &_data_word(0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a);
632 &_data_word(0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b);
633 &_data_word(0x55fa3020, 0xf66d76ad, 0x9176cc88, 0x254c02f5);
634 &_data_word(0xfcd7e54f, 0xd7cb2ac5, 0x80443526, 0x8fa362b5);
635 &_data_word(0x495ab1de, 0x671bba25, 0x980eea45, 0xe1c0fe5d);
636 &_data_word(0x02752fc3, 0x12f04c81, 0xa397468d, 0xc6f9d36b);
637 &_data_word(0xe75f8f03, 0x959c9215, 0xeb7a6dbf, 0xda595295);
638 &_data_word(0x2d83bed4, 0xd3217458, 0x2969e049, 0x44c8c98e);
639 &_data_word(0x6a89c275, 0x78798ef4, 0x6b3e5899, 0xdd71b927);
640 &_data_word(0xb64fe1be, 0x17ad88f0, 0x66ac20c9, 0xb43ace7d);
641 &_data_word(0x184adf63, 0x82311ae5, 0x60335197, 0x457f5362);
642 &_data_word(0xe07764b1, 0x84ae6bbb, 0x1ca081fe, 0x942b08f9);
643 &_data_word(0x58684870, 0x19fd458f, 0x876cde94, 0xb7f87b52);
644 &_data_word(0x23d373ab, 0xe2024b72, 0x578f1fe3, 0x2aab5566);
645 &_data_word(0x0728ebb2, 0x03c2b52f, 0x9a7bc586, 0xa50837d3);
646 &_data_word(0xf2872830, 0xb2a5bf23, 0xba6a0302, 0x5c8216ed);
647 &_data_word(0x2b1ccf8a, 0x92b479a7, 0xf0f207f3, 0xa1e2694e);
648 &_data_word(0xcdf4da65, 0xd5be0506, 0x1f6234d1, 0x8afea6c4);
649 &_data_word(0x9d532e34, 0xa055f3a2, 0x32e18a05, 0x75ebf6a4);
650 &_data_word(0x39ec830b, 0xaaef6040, 0x069f715e, 0x51106ebd);
651 &_data_word(0xf98a213e, 0x3d06dd96, 0xae053edd, 0x46bde64d);
652 &_data_word(0xb58d5491, 0x055dc471, 0x6fd40604, 0xff155060);
653 &_data_word(0x24fb9819, 0x97e9bdd6, 0xcc434089, 0x779ed967);
654 &_data_word(0xbd42e8b0, 0x888b8907, 0x385b19e7, 0xdbeec879);
655 &_data_word(0x470a7ca1, 0xe90f427c, 0xc91e84f8, 0x00000000);
656 &_data_word(0x83868009, 0x48ed2b32, 0xac70111e, 0x4e725a6c);
657 &_data_word(0xfbff0efd, 0x5638850f, 0x1ed5ae3d, 0x27392d36);
658 &_data_word(0x64d90f0a, 0x21a65c68, 0xd1545b9b, 0x3a2e3624);
659 &_data_word(0xb1670a0c, 0x0fe75793, 0xd296eeb4, 0x9e919b1b);
660 &_data_word(0x4fc5c080, 0xa220dc61, 0x694b775a, 0x161a121c);
661 &_data_word(0x0aba93e2, 0xe52aa0c0, 0x43e0223c, 0x1d171b12);
662 &_data_word(0x0b0d090e, 0xadc78bf2, 0xb9a8b62d, 0xc8a91e14);
663 &_data_word(0x8519f157, 0x4c0775af, 0xbbdd99ee, 0xfd607fa3);
664 &_data_word(0x9f2601f7, 0xbcf5725c, 0xc53b6644, 0x347efb5b);
665 &_data_word(0x7629438b, 0xdcc623cb, 0x68fcedb6, 0x63f1e4b8);
666 &_data_word(0xcadc31d7, 0x10856342, 0x40229713, 0x2011c684);
667 &_data_word(0x7d244a85, 0xf83dbbd2, 0x1132f9ae, 0x6da129c7);
668 &_data_word(0x4b2f9e1d, 0xf330b2dc, 0xec52860d, 0xd0e3c177);
669 &_data_word(0x6c16b32b, 0x99b970a9, 0xfa489411, 0x2264e947);
670 &_data_word(0xc48cfca8, 0x1a3ff0a0, 0xd82c7d56, 0xef903322);
671 &_data_word(0xc74e4987, 0xc1d138d9, 0xfea2ca8c, 0x360bd498);
672 &_data_word(0xcf81f5a6, 0x28de7aa5, 0x268eb7da, 0xa4bfad3f);
673 &_data_word(0xe49d3a2c, 0x0d927850, 0x9bcc5f6a, 0x62467e54);
674 &_data_word(0xc2138df6, 0xe8b8d890, 0x5ef7392e, 0xf5afc382);
675 &_data_word(0xbe805d9f, 0x7c93d069, 0xa92dd56f, 0xb31225cf);
676 &_data_word(0x3b99acc8, 0xa77d1810, 0x6e639ce8, 0x7bbb3bdb);
677 &_data_word(0x097826cd, 0xf418596e, 0x01b79aec, 0xa89a4f83);
678 &_data_word(0x656e95e6, 0x7ee6ffaa, 0x08cfbc21, 0xe6e815ef);
679 &_data_word(0xd99be7ba, 0xce366f4a, 0xd4099fea, 0xd67cb029);
680 &_data_word(0xafb2a431, 0x31233f2a, 0x3094a5c6, 0xc066a235);
681 &_data_word(0x37bc4e74, 0xa6ca82fc, 0xb0d090e0, 0x15d8a733);
682 &_data_word(0x4a9804f1, 0xf7daec41, 0x0e50cd7f, 0x2ff69117);
683 &_data_word(0x8dd64d76, 0x4db0ef43, 0x544daacc, 0xdf0496e4);
684 &_data_word(0xe3b5d19e, 0x1b886a4c, 0xb81f2cc1, 0x7f516546);
685 &_data_word(0x04ea5e9d, 0x5d358c01, 0x737487fa, 0x2e410bfb);
686 &_data_word(0x5a1d67b3, 0x52d2db92, 0x335610e9, 0x1347d66d);
687 &_data_word(0x8c61d79a, 0x7a0ca137, 0x8e14f859, 0x893c13eb);
688 &_data_word(0xee27a9ce, 0x35c961b7, 0xede51ce1, 0x3cb1477a);
689 &_data_word(0x59dfd29c, 0x3f73f255, 0x79ce1418, 0xbf37c773);
690 &_data_word(0xeacdf753, 0x5baafd5f, 0x146f3ddf, 0x86db4478);
691 &_data_word(0x81f3afca, 0x3ec468b9, 0x2c342438, 0x5f40a3c2);
692 &_data_word(0x72c31d16, 0x0c25e2bc, 0x8b493c28, 0x41950dff);
693 &_data_word(0x7101a839, 0xdeb30c08, 0x9ce4b4d8, 0x90c15664);
694 &_data_word(0x6184cb7b, 0x70b632d5, 0x745c6c48, 0x4257b8d0);
695#Td4:
696 &data_byte(0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38);
697 &data_byte(0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb);
698 &data_byte(0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87);
699 &data_byte(0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb);
700 &data_byte(0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d);
701 &data_byte(0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e);
702 &data_byte(0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2);
703 &data_byte(0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25);
704 &data_byte(0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16);
705 &data_byte(0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92);
706 &data_byte(0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda);
707 &data_byte(0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84);
708 &data_byte(0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a);
709 &data_byte(0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06);
710 &data_byte(0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02);
711 &data_byte(0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b);
712 &data_byte(0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea);
713 &data_byte(0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73);
714 &data_byte(0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85);
715 &data_byte(0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e);
716 &data_byte(0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89);
717 &data_byte(0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b);
718 &data_byte(0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20);
719 &data_byte(0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4);
720 &data_byte(0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31);
721 &data_byte(0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f);
722 &data_byte(0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d);
723 &data_byte(0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef);
724 &data_byte(0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0);
725 &data_byte(0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61);
726 &data_byte(0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26);
727 &data_byte(0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d);
728&function_end_B("_x86_AES_decrypt");
729
730# void AES_decrypt (const void *inp,void *out,const AES_KEY *key);
731&public_label("AES_Td");
732&function_begin("AES_decrypt");
733 &mov ($acc,&wparam(0)); # load inp
734 &mov ($key,&wparam(2)); # load key
735
736 &mov ($s0,"esp");
737 &sub ("esp",24);
738 &and ("esp",-64);
739 &add ("esp",4);
740 &mov (&DWP(16,"esp"),$s0);
741
742 &call (&label("pic_point")); # make it PIC!
743 &set_label("pic_point");
744 &blindpop("ebp");
745 &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
746
747 # prefetch Td4
748 &lea ("ebp",&DWP(2048+128,"ebp"));
749 &mov ($s0,&DWP(0-128,"ebp"));
750 &mov ($s1,&DWP(32-128,"ebp"));
751 &mov ($s2,&DWP(64-128,"ebp"));
752 &mov ($s3,&DWP(96-128,"ebp"));
753 &mov ($s0,&DWP(128-128,"ebp"));
754 &mov ($s1,&DWP(160-128,"ebp"));
755 &mov ($s2,&DWP(192-128,"ebp"));
756 &mov ($s3,&DWP(224-128,"ebp"));
757 &lea ("ebp",&DWP(-2048-128,"ebp"));
758
759 &mov ($s0,&DWP(0,$acc)); # load input data
760 &mov ($s1,&DWP(4,$acc));
761 &mov ($s2,&DWP(8,$acc));
762 &mov ($s3,&DWP(12,$acc));
763
764 &call ("_x86_AES_decrypt");
765
766 &mov ("esp",&DWP(16,"esp"));
767
768 &mov ($acc,&wparam(1)); # load out
769 &mov (&DWP(0,$acc),$s0); # write output data
770 &mov (&DWP(4,$acc),$s1);
771 &mov (&DWP(8,$acc),$s2);
772 &mov (&DWP(12,$acc),$s3);
773&function_end("AES_decrypt");
774
775# void AES_cbc_encrypt (const void char *inp, unsigned char *out,
776# size_t length, const AES_KEY *key,
777# unsigned char *ivp,const int enc);
778{
779# stack frame layout
780# -4(%esp) 0(%esp) return address
781# 0(%esp) 4(%esp) tmp1
782# 4(%esp) 8(%esp) tmp2
783# 8(%esp) 12(%esp) key
784# 12(%esp) 16(%esp) end of key schedule
785my $_esp=&DWP(16,"esp"); #saved %esp
786my $_inp=&DWP(20,"esp"); #copy of wparam(0)
787my $_out=&DWP(24,"esp"); #copy of wparam(1)
788my $_len=&DWP(28,"esp"); #copy of wparam(2)
789my $_key=&DWP(32,"esp"); #copy of wparam(3)
790my $_ivp=&DWP(36,"esp"); #copy of wparam(4)
791my $_tmp=&DWP(40,"esp"); #volatile variable
792my $ivec=&DWP(44,"esp"); #ivec[16]
793my $aes_key=&DWP(60,"esp"); #copy of aes_key
794my $mark=&DWP(60+240,"esp"); #copy of aes_key->rounds
795
796&public_label("AES_Te");
797&public_label("AES_Td");
798&function_begin("AES_cbc_encrypt");
799 &mov ($s2 eq "ecx"? $s2 : "",&wparam(2)); # load len
800 &cmp ($s2,0);
801 &je (&label("enc_out"));
802
803 &call (&label("pic_point")); # make it PIC!
804 &set_label("pic_point");
805 &blindpop("ebp");
806
807 &pushf ();
808 &cld ();
809
810 &cmp (&wparam(5),0);
811 &je (&label("DECRYPT"));
812
813 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
814
815 # allocate aligned stack frame...
816 &lea ($key,&DWP(-64-244,"esp"));
817 &and ($key,-64);
818
819 # ... and make sure it doesn't alias with AES_Te modulo 4096
820 &mov ($s0,"ebp");
821 &lea ($s1,&DWP(2048,"ebp"));
822 &mov ($s3,$key);
823 &and ($s0,0xfff); # s = %ebp&0xfff
824 &and ($s1,0xfff); # e = (%ebp+2048)&0xfff
825 &and ($s3,0xfff); # p = %esp&0xfff
826
827 &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e);
828 &jb (&label("te_break_out"));
829 &sub ($s3,$s1);
830 &sub ($key,$s3);
831 &jmp (&label("te_ok"));
832 &set_label("te_break_out"); # else %esp -= (p-s)&0xfff + framesz;
833 &sub ($s3,$s0);
834 &and ($s3,0xfff);
835 &add ($s3,64+256);
836 &sub ($key,$s3);
837 &align (4);
838 &set_label("te_ok");
839
840 &mov ($s0,&wparam(0)); # load inp
841 &mov ($s1,&wparam(1)); # load out
842 &mov ($s3,&wparam(3)); # load key
843 &mov ($acc,&wparam(4)); # load ivp
844
845 &exch ("esp",$key);
846 &add ("esp",4); # reserve for return address!
847 &mov ($_esp,$key); # save %esp
848
849 &mov ($_inp,$s0); # save copy of inp
850 &mov ($_out,$s1); # save copy of out
851 &mov ($_len,$s2); # save copy of len
852 &mov ($_key,$s3); # save copy of key
853 &mov ($_ivp,$acc); # save copy of ivp
854
855 &mov ($mark,0); # copy of aes_key->rounds = 0;
856 if ($compromise) {
857 &cmp ($s2,$compromise);
858 &jb (&label("skip_ecopy"));
859 }
860 # do we copy key schedule to stack?
861 &mov ($s1 eq "ebx" ? $s1 : "",$s3);
862 &mov ($s2 eq "ecx" ? $s2 : "",244/4);
863 &sub ($s1,"ebp");
864 &mov ("esi",$s3);
865 &and ($s1,0xfff);
866 &lea ("edi",$aes_key);
867 &cmp ($s1,2048);
868 &jb (&label("do_ecopy"));
869 &cmp ($s1,4096-244);
870 &jb (&label("skip_ecopy"));
871 &align (4);
872 &set_label("do_ecopy");
873 &mov ($_key,"edi");
874 &data_word(0xA5F3F689); # rep movsd
875 &set_label("skip_ecopy");
876
877 &mov ($acc,$s0);
878 &mov ($key,16);
879 &align (4);
880 &set_label("prefetch_te");
881 &mov ($s0,&DWP(0,"ebp"));
882 &mov ($s1,&DWP(32,"ebp"));
883 &mov ($s2,&DWP(64,"ebp"));
884 &mov ($s3,&DWP(96,"ebp"));
885 &lea ("ebp",&DWP(128,"ebp"));
886 &dec ($key);
887 &jnz (&label("prefetch_te"));
888 &sub ("ebp",2048);
889
890 &mov ($s2,$_len);
891 &mov ($key,$_ivp);
892 &test ($s2,0xFFFFFFF0);
893 &jz (&label("enc_tail")); # short input...
894
895 &mov ($s0,&DWP(0,$key)); # load iv
896 &mov ($s1,&DWP(4,$key));
897
898 &align (4);
899 &set_label("enc_loop");
900 &mov ($s2,&DWP(8,$key));
901 &mov ($s3,&DWP(12,$key));
902
903 &xor ($s0,&DWP(0,$acc)); # xor input data
904 &xor ($s1,&DWP(4,$acc));
905 &xor ($s2,&DWP(8,$acc));
906 &xor ($s3,&DWP(12,$acc));
907
908 &mov ($key,$_key); # load key
909 &call ("_x86_AES_encrypt");
910
911 &mov ($acc,$_inp); # load inp
912 &mov ($key,$_out); # load out
913
914 &mov (&DWP(0,$key),$s0); # save output data
915 &mov (&DWP(4,$key),$s1);
916 &mov (&DWP(8,$key),$s2);
917 &mov (&DWP(12,$key),$s3);
918
919 &mov ($s2,$_len); # load len
920
921 &lea ($acc,&DWP(16,$acc));
922 &mov ($_inp,$acc); # save inp
923
924 &lea ($s3,&DWP(16,$key));
925 &mov ($_out,$s3); # save out
926
927 &sub ($s2,16);
928 &test ($s2,0xFFFFFFF0);
929 &mov ($_len,$s2); # save len
930 &jnz (&label("enc_loop"));
931 &test ($s2,15);
932 &jnz (&label("enc_tail"));
933 &mov ($acc,$_ivp); # load ivp
934 &mov ($s2,&DWP(8,$key)); # restore last dwords
935 &mov ($s3,&DWP(12,$key));
936 &mov (&DWP(0,$acc),$s0); # save ivec
937 &mov (&DWP(4,$acc),$s1);
938 &mov (&DWP(8,$acc),$s2);
939 &mov (&DWP(12,$acc),$s3);
940
941 &cmp ($mark,0); # was the key schedule copied?
942 &mov ("edi",$_key);
943 &je (&label("skip_ezero"));
944 # zero copy of key schedule
945 &mov ("ecx",240/4);
946 &xor ("eax","eax");
947 &align (4);
948 &data_word(0xABF3F689); # rep stosd
949 &set_label("skip_ezero")
950 &mov ("esp",$_esp);
951 &popf ();
952 &set_label("enc_out");
953 &function_end_A();
954 &pushf (); # kludge, never executed
955
956 &align (4);
957 &set_label("enc_tail");
958 &mov ($s0,$key eq "edi" ? $key : "");
959 &mov ($key,$_out); # load out
960 &push ($s0); # push ivp
961 &mov ($s1,16);
962 &sub ($s1,$s2);
963 &cmp ($key,$acc); # compare with inp
964 &je (&label("enc_in_place"));
965 &align (4);
966 &data_word(0xA4F3F689); # rep movsb # copy input
967 &jmp (&label("enc_skip_in_place"));
968 &set_label("enc_in_place");
969 &lea ($key,&DWP(0,$key,$s2));
970 &set_label("enc_skip_in_place");
971 &mov ($s2,$s1);
972 &xor ($s0,$s0);
973 &align (4);
974 &data_word(0xAAF3F689); # rep stosb # zero tail
975 &pop ($key); # pop ivp
976
977 &mov ($acc,$_out); # output as input
978 &mov ($s0,&DWP(0,$key));
979 &mov ($s1,&DWP(4,$key));
980 &mov ($_len,16); # len=16
981 &jmp (&label("enc_loop")); # one more spin...
982
983#----------------------------- DECRYPT -----------------------------#
984&align (4);
985&set_label("DECRYPT");
986 &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
987
988 # allocate aligned stack frame...
989 &lea ($key,&DWP(-64-244,"esp"));
990 &and ($key,-64);
991
992 # ... and make sure it doesn't alias with AES_Td modulo 4096
993 &mov ($s0,"ebp");
994 &lea ($s1,&DWP(2048+256,"ebp"));
995 &mov ($s3,$key);
996 &and ($s0,0xfff); # s = %ebp&0xfff
997 &and ($s1,0xfff); # e = (%ebp+2048+256)&0xfff
998 &and ($s3,0xfff); # p = %esp&0xfff
999
1000 &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e);
1001 &jb (&label("td_break_out"));
1002 &sub ($s3,$s1);
1003 &sub ($key,$s3);
1004 &jmp (&label("td_ok"));
1005 &set_label("td_break_out"); # else %esp -= (p-s)&0xfff + framesz;
1006 &sub ($s3,$s0);
1007 &and ($s3,0xfff);
1008 &add ($s3,64+256);
1009 &sub ($key,$s3);
1010 &align (4);
1011 &set_label("td_ok");
1012
1013 &mov ($s0,&wparam(0)); # load inp
1014 &mov ($s1,&wparam(1)); # load out
1015 &mov ($s3,&wparam(3)); # load key
1016 &mov ($acc,&wparam(4)); # load ivp
1017
1018 &exch ("esp",$key);
1019 &add ("esp",4); # reserve for return address!
1020 &mov ($_esp,$key); # save %esp
1021
1022 &mov ($_inp,$s0); # save copy of inp
1023 &mov ($_out,$s1); # save copy of out
1024 &mov ($_len,$s2); # save copy of len
1025 &mov ($_key,$s3); # save copy of key
1026 &mov ($_ivp,$acc); # save copy of ivp
1027
1028 &mov ($mark,0); # copy of aes_key->rounds = 0;
1029 if ($compromise) {
1030 &cmp ($s2,$compromise);
1031 &jb (&label("skip_dcopy"));
1032 }
1033 # do we copy key schedule to stack?
1034 &mov ($s1 eq "ebx" ? $s1 : "",$s3);
1035 &mov ($s2 eq "ecx" ? $s2 : "",244/4);
1036 &sub ($s1,"ebp");
1037 &mov ("esi",$s3);
1038 &and ($s1,0xfff);
1039 &lea ("edi",$aes_key);
1040 &cmp ($s1,2048+256);
1041 &jb (&label("do_dcopy"));
1042 &cmp ($s1,4096-244);
1043 &jb (&label("skip_dcopy"));
1044 &align (4);
1045 &set_label("do_dcopy");
1046 &mov ($_key,"edi");
1047 &data_word(0xA5F3F689); # rep movsd
1048 &set_label("skip_dcopy");
1049
1050 &mov ($acc,$s0);
1051 &mov ($key,18);
1052 &align (4);
1053 &set_label("prefetch_td");
1054 &mov ($s0,&DWP(0,"ebp"));
1055 &mov ($s1,&DWP(32,"ebp"));
1056 &mov ($s2,&DWP(64,"ebp"));
1057 &mov ($s3,&DWP(96,"ebp"));
1058 &lea ("ebp",&DWP(128,"ebp"));
1059 &dec ($key);
1060 &jnz (&label("prefetch_td"));
1061 &sub ("ebp",2048+256);
1062
1063 &cmp ($acc,$_out);
1064 &je (&label("dec_in_place")); # in-place processing...
1065
1066 &mov ($key,$_ivp); # load ivp
1067 &mov ($_tmp,$key);
1068
1069 &align (4);
1070 &set_label("dec_loop");
1071 &mov ($s0,&DWP(0,$acc)); # read input
1072 &mov ($s1,&DWP(4,$acc));
1073 &mov ($s2,&DWP(8,$acc));
1074 &mov ($s3,&DWP(12,$acc));
1075
1076 &mov ($key,$_key); # load key
1077 &call ("_x86_AES_decrypt");
1078
1079 &mov ($key,$_tmp); # load ivp
1080 &mov ($acc,$_len); # load len
1081 &xor ($s0,&DWP(0,$key)); # xor iv
1082 &xor ($s1,&DWP(4,$key));
1083 &xor ($s2,&DWP(8,$key));
1084 &xor ($s3,&DWP(12,$key));
1085
1086 &sub ($acc,16);
1087 &jc (&label("dec_partial"));
1088 &mov ($_len,$acc); # save len
1089 &mov ($acc,$_inp); # load inp
1090 &mov ($key,$_out); # load out
1091
1092 &mov (&DWP(0,$key),$s0); # write output
1093 &mov (&DWP(4,$key),$s1);
1094 &mov (&DWP(8,$key),$s2);
1095 &mov (&DWP(12,$key),$s3);
1096
1097 &mov ($_tmp,$acc); # save ivp
1098 &lea ($acc,&DWP(16,$acc));
1099 &mov ($_inp,$acc); # save inp
1100
1101 &lea ($key,&DWP(16,$key));
1102 &mov ($_out,$key); # save out
1103
1104 &jnz (&label("dec_loop"));
1105 &mov ($key,$_tmp); # load temp ivp
1106 &set_label("dec_end");
1107 &mov ($acc,$_ivp); # load user ivp
1108 &mov ($s0,&DWP(0,$key)); # load iv
1109 &mov ($s1,&DWP(4,$key));
1110 &mov ($s2,&DWP(8,$key));
1111 &mov ($s3,&DWP(12,$key));
1112 &mov (&DWP(0,$acc),$s0); # copy back to user
1113 &mov (&DWP(4,$acc),$s1);
1114 &mov (&DWP(8,$acc),$s2);
1115 &mov (&DWP(12,$acc),$s3);
1116 &jmp (&label("dec_out"));
1117
1118 &align (4);
1119 &set_label("dec_partial");
1120 &lea ($key,$ivec);
1121 &mov (&DWP(0,$key),$s0); # dump output to stack
1122 &mov (&DWP(4,$key),$s1);
1123 &mov (&DWP(8,$key),$s2);
1124 &mov (&DWP(12,$key),$s3);
1125 &lea ($s2 eq "ecx" ? $s2 : "",&DWP(16,$acc));
1126 &mov ($acc eq "esi" ? $acc : "",$key);
1127 &mov ($key eq "edi" ? $key : "",$_out); # load out
1128 &data_word(0xA4F3F689); # rep movsb # copy output
1129 &mov ($key,$_inp); # use inp as temp ivp
1130 &jmp (&label("dec_end"));
1131
1132 &align (4);
1133 &set_label("dec_in_place");
1134 &set_label("dec_in_place_loop");
1135 &lea ($key,$ivec);
1136 &mov ($s0,&DWP(0,$acc)); # read input
1137 &mov ($s1,&DWP(4,$acc));
1138 &mov ($s2,&DWP(8,$acc));
1139 &mov ($s3,&DWP(12,$acc));
1140
1141 &mov (&DWP(0,$key),$s0); # copy to temp
1142 &mov (&DWP(4,$key),$s1);
1143 &mov (&DWP(8,$key),$s2);
1144 &mov (&DWP(12,$key),$s3);
1145
1146 &mov ($key,$_key); # load key
1147 &call ("_x86_AES_decrypt");
1148
1149 &mov ($key,$_ivp); # load ivp
1150 &mov ($acc,$_out); # load out
1151 &xor ($s0,&DWP(0,$key)); # xor iv
1152 &xor ($s1,&DWP(4,$key));
1153 &xor ($s2,&DWP(8,$key));
1154 &xor ($s3,&DWP(12,$key));
1155
1156 &mov (&DWP(0,$acc),$s0); # write output
1157 &mov (&DWP(4,$acc),$s1);
1158 &mov (&DWP(8,$acc),$s2);
1159 &mov (&DWP(12,$acc),$s3);
1160
1161 &lea ($acc,&DWP(16,$acc));
1162 &mov ($_out,$acc); # save out
1163
1164 &lea ($acc,$ivec);
1165 &mov ($s0,&DWP(0,$acc)); # read temp
1166 &mov ($s1,&DWP(4,$acc));
1167 &mov ($s2,&DWP(8,$acc));
1168 &mov ($s3,&DWP(12,$acc));
1169
1170 &mov (&DWP(0,$key),$s0); # copy iv
1171 &mov (&DWP(4,$key),$s1);
1172 &mov (&DWP(8,$key),$s2);
1173 &mov (&DWP(12,$key),$s3);
1174
1175 &mov ($acc,$_inp); # load inp
1176
1177 &lea ($acc,&DWP(16,$acc));
1178 &mov ($_inp,$acc); # save inp
1179
1180 &mov ($s2,$_len); # load len
1181 &sub ($s2,16);
1182 &jc (&label("dec_in_place_partial"));
1183 &mov ($_len,$s2); # save len
1184 &jnz (&label("dec_in_place_loop"));
1185 &jmp (&label("dec_out"));
1186
1187 &align (4);
1188 &set_label("dec_in_place_partial");
1189 # one can argue if this is actually required...
1190 &mov ($key eq "edi" ? $key : "",$_out);
1191 &lea ($acc eq "esi" ? $acc : "",$ivec);
1192 &lea ($key,&DWP(0,$key,$s2));
1193 &lea ($acc,&DWP(16,$acc,$s2));
1194 &neg ($s2 eq "ecx" ? $s2 : "");
1195 &data_word(0xA4F3F689); # rep movsb # restore tail
1196
1197 &align (4);
1198 &set_label("dec_out");
1199 &cmp ($mark,0); # was the key schedule copied?
1200 &mov ("edi",$_key);
1201 &je (&label("skip_dzero"));
1202 # zero copy of key schedule
1203 &mov ("ecx",240/4);
1204 &xor ("eax","eax");
1205 &align (4);
1206 &data_word(0xABF3F689); # rep stosd
1207 &set_label("skip_dzero")
1208 &mov ("esp",$_esp);
1209 &popf ();
1210&function_end("AES_cbc_encrypt");
1211}
1212
1213#------------------------------------------------------------------#
1214
1215sub enckey()
1216{
1217 &movz ("esi",&LB("edx")); # rk[i]>>0
1218 &mov ("ebx",&DWP(2,"ebp","esi",8));
1219 &movz ("esi",&HB("edx")); # rk[i]>>8
1220 &and ("ebx",0xFF000000);
1221 &xor ("eax","ebx");
1222
1223 &mov ("ebx",&DWP(2,"ebp","esi",8));
1224 &shr ("edx",16);
1225 &and ("ebx",0x000000FF);
1226 &movz ("esi",&LB("edx")); # rk[i]>>16
1227 &xor ("eax","ebx");
1228
1229 &mov ("ebx",&DWP(0,"ebp","esi",8));
1230 &movz ("esi",&HB("edx")); # rk[i]>>24
1231 &and ("ebx",0x0000FF00);
1232 &xor ("eax","ebx");
1233
1234 &mov ("ebx",&DWP(0,"ebp","esi",8));
1235 &and ("ebx",0x00FF0000);
1236 &xor ("eax","ebx");
1237
1238 &xor ("eax",&DWP(2048,"ebp","ecx",4)); # rcon
1239}
1240
1241# int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
1242# AES_KEY *key)
1243&public_label("AES_Te");
1244&function_begin("AES_set_encrypt_key", "", "_x86_AES_set_encrypt_key");
1245 &mov ("esi",&wparam(0)); # user supplied key
1246 &mov ("edi",&wparam(2)); # private key schedule
1247
1248 &test ("esi",-1);
1249 &jz (&label("badpointer"));
1250 &test ("edi",-1);
1251 &jz (&label("badpointer"));
1252
1253 &call (&label("pic_point"));
1254 &set_label("pic_point");
1255 &blindpop("ebp");
1256 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
1257
1258 &mov ("ecx",&wparam(1)); # number of bits in key
1259 &cmp ("ecx",128);
1260 &je (&label("10rounds"));
1261 &cmp ("ecx",192);
1262 &je (&label("12rounds"));
1263 &cmp ("ecx",256);
1264 &je (&label("14rounds"));
1265 &mov ("eax",-2); # invalid number of bits
1266 &jmp (&label("exit"));
1267
1268 &set_label("10rounds");
1269 &mov ("eax",&DWP(0,"esi")); # copy first 4 dwords
1270 &mov ("ebx",&DWP(4,"esi"));
1271 &mov ("ecx",&DWP(8,"esi"));
1272 &mov ("edx",&DWP(12,"esi"));
1273 &mov (&DWP(0,"edi"),"eax");
1274 &mov (&DWP(4,"edi"),"ebx");
1275 &mov (&DWP(8,"edi"),"ecx");
1276 &mov (&DWP(12,"edi"),"edx");
1277
1278 &xor ("ecx","ecx");
1279 &jmp (&label("10shortcut"));
1280
1281 &align (4);
1282 &set_label("10loop");
1283 &mov ("eax",&DWP(0,"edi")); # rk[0]
1284 &mov ("edx",&DWP(12,"edi")); # rk[3]
1285 &set_label("10shortcut");
1286 &enckey ();
1287
1288 &mov (&DWP(16,"edi"),"eax"); # rk[4]
1289 &xor ("eax",&DWP(4,"edi"));
1290 &mov (&DWP(20,"edi"),"eax"); # rk[5]
1291 &xor ("eax",&DWP(8,"edi"));
1292 &mov (&DWP(24,"edi"),"eax"); # rk[6]
1293 &xor ("eax",&DWP(12,"edi"));
1294 &mov (&DWP(28,"edi"),"eax"); # rk[7]
1295 &inc ("ecx");
1296 &add ("edi",16);
1297 &cmp ("ecx",10);
1298 &jl (&label("10loop"));
1299
1300 &mov (&DWP(80,"edi"),10); # setup number of rounds
1301 &xor ("eax","eax");
1302 &jmp (&label("exit"));
1303
1304 &set_label("12rounds");
1305 &mov ("eax",&DWP(0,"esi")); # copy first 6 dwords
1306 &mov ("ebx",&DWP(4,"esi"));
1307 &mov ("ecx",&DWP(8,"esi"));
1308 &mov ("edx",&DWP(12,"esi"));
1309 &mov (&DWP(0,"edi"),"eax");
1310 &mov (&DWP(4,"edi"),"ebx");
1311 &mov (&DWP(8,"edi"),"ecx");
1312 &mov (&DWP(12,"edi"),"edx");
1313 &mov ("ecx",&DWP(16,"esi"));
1314 &mov ("edx",&DWP(20,"esi"));
1315 &mov (&DWP(16,"edi"),"ecx");
1316 &mov (&DWP(20,"edi"),"edx");
1317
1318 &xor ("ecx","ecx");
1319 &jmp (&label("12shortcut"));
1320
1321 &align (4);
1322 &set_label("12loop");
1323 &mov ("eax",&DWP(0,"edi")); # rk[0]
1324 &mov ("edx",&DWP(20,"edi")); # rk[5]
1325 &set_label("12shortcut");
1326 &enckey ();
1327
1328 &mov (&DWP(24,"edi"),"eax"); # rk[6]
1329 &xor ("eax",&DWP(4,"edi"));
1330 &mov (&DWP(28,"edi"),"eax"); # rk[7]
1331 &xor ("eax",&DWP(8,"edi"));
1332 &mov (&DWP(32,"edi"),"eax"); # rk[8]
1333 &xor ("eax",&DWP(12,"edi"));
1334 &mov (&DWP(36,"edi"),"eax"); # rk[9]
1335
1336 &cmp ("ecx",7);
1337 &je (&label("12break"));
1338 &inc ("ecx");
1339
1340 &xor ("eax",&DWP(16,"edi"));
1341 &mov (&DWP(40,"edi"),"eax"); # rk[10]
1342 &xor ("eax",&DWP(20,"edi"));
1343 &mov (&DWP(44,"edi"),"eax"); # rk[11]
1344
1345 &add ("edi",24);
1346 &jmp (&label("12loop"));
1347
1348 &set_label("12break");
1349 &mov (&DWP(72,"edi"),12); # setup number of rounds
1350 &xor ("eax","eax");
1351 &jmp (&label("exit"));
1352
1353 &set_label("14rounds");
1354 &mov ("eax",&DWP(0,"esi")); # copy first 8 dwords
1355 &mov ("ebx",&DWP(4,"esi"));
1356 &mov ("ecx",&DWP(8,"esi"));
1357 &mov ("edx",&DWP(12,"esi"));
1358 &mov (&DWP(0,"edi"),"eax");
1359 &mov (&DWP(4,"edi"),"ebx");
1360 &mov (&DWP(8,"edi"),"ecx");
1361 &mov (&DWP(12,"edi"),"edx");
1362 &mov ("eax",&DWP(16,"esi"));
1363 &mov ("ebx",&DWP(20,"esi"));
1364 &mov ("ecx",&DWP(24,"esi"));
1365 &mov ("edx",&DWP(28,"esi"));
1366 &mov (&DWP(16,"edi"),"eax");
1367 &mov (&DWP(20,"edi"),"ebx");
1368 &mov (&DWP(24,"edi"),"ecx");
1369 &mov (&DWP(28,"edi"),"edx");
1370
1371 &xor ("ecx","ecx");
1372 &jmp (&label("14shortcut"));
1373
1374 &align (4);
1375 &set_label("14loop");
1376 &mov ("edx",&DWP(28,"edi")); # rk[7]
1377 &set_label("14shortcut");
1378 &mov ("eax",&DWP(0,"edi")); # rk[0]
1379
1380 &enckey ();
1381
1382 &mov (&DWP(32,"edi"),"eax"); # rk[8]
1383 &xor ("eax",&DWP(4,"edi"));
1384 &mov (&DWP(36,"edi"),"eax"); # rk[9]
1385 &xor ("eax",&DWP(8,"edi"));
1386 &mov (&DWP(40,"edi"),"eax"); # rk[10]
1387 &xor ("eax",&DWP(12,"edi"));
1388 &mov (&DWP(44,"edi"),"eax"); # rk[11]
1389
1390 &cmp ("ecx",6);
1391 &je (&label("14break"));
1392 &inc ("ecx");
1393
1394 &mov ("edx","eax");
1395 &mov ("eax",&DWP(16,"edi")); # rk[4]
1396 &movz ("esi",&LB("edx")); # rk[11]>>0
1397 &mov ("ebx",&DWP(2,"ebp","esi",8));
1398 &movz ("esi",&HB("edx")); # rk[11]>>8
1399 &and ("ebx",0x000000FF);
1400 &xor ("eax","ebx");
1401
1402 &mov ("ebx",&DWP(0,"ebp","esi",8));
1403 &shr ("edx",16);
1404 &and ("ebx",0x0000FF00);
1405 &movz ("esi",&LB("edx")); # rk[11]>>16
1406 &xor ("eax","ebx");
1407
1408 &mov ("ebx",&DWP(0,"ebp","esi",8));
1409 &movz ("esi",&HB("edx")); # rk[11]>>24
1410 &and ("ebx",0x00FF0000);
1411 &xor ("eax","ebx");
1412
1413 &mov ("ebx",&DWP(2,"ebp","esi",8));
1414 &and ("ebx",0xFF000000);
1415 &xor ("eax","ebx");
1416
1417 &mov (&DWP(48,"edi"),"eax"); # rk[12]
1418 &xor ("eax",&DWP(20,"edi"));
1419 &mov (&DWP(52,"edi"),"eax"); # rk[13]
1420 &xor ("eax",&DWP(24,"edi"));
1421 &mov (&DWP(56,"edi"),"eax"); # rk[14]
1422 &xor ("eax",&DWP(28,"edi"));
1423 &mov (&DWP(60,"edi"),"eax"); # rk[15]
1424
1425 &add ("edi",32);
1426 &jmp (&label("14loop"));
1427
1428 &set_label("14break");
1429 &mov (&DWP(48,"edi"),14); # setup number of rounds
1430 &xor ("eax","eax");
1431 &jmp (&label("exit"));
1432
1433 &set_label("badpointer");
1434 &mov ("eax",-1);
1435 &set_label("exit");
1436&function_end("AES_set_encrypt_key");
1437
1438sub deckey()
1439{ my ($i,$ptr,$te,$td) = @_;
1440
1441 &mov ("eax",&DWP($i,$ptr));
1442 &mov ("edx","eax");
1443 &movz ("ebx",&HB("eax"));
1444 &shr ("edx",16);
1445 &and ("eax",0xFF);
1446 &movz ("eax",&BP(2,$te,"eax",8));
1447 &movz ("ebx",&BP(2,$te,"ebx",8));
1448 &mov ("eax",&DWP(0,$td,"eax",8));
1449 &xor ("eax",&DWP(3,$td,"ebx",8));
1450 &movz ("ebx",&HB("edx"));
1451 &and ("edx",0xFF);
1452 &movz ("edx",&BP(2,$te,"edx",8));
1453 &movz ("ebx",&BP(2,$te,"ebx",8));
1454 &xor ("eax",&DWP(2,$td,"edx",8));
1455 &xor ("eax",&DWP(1,$td,"ebx",8));
1456 &mov (&DWP($i,$ptr),"eax");
1457}
1458
1459# int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
1460# AES_KEY *key)
1461&public_label("AES_Td");
1462&public_label("AES_Te");
1463&function_begin_B("AES_set_decrypt_key");
1464 &mov ("eax",&wparam(0));
1465 &mov ("ecx",&wparam(1));
1466 &mov ("edx",&wparam(2));
1467 &sub ("esp",12);
1468 &mov (&DWP(0,"esp"),"eax");
1469 &mov (&DWP(4,"esp"),"ecx");
1470 &mov (&DWP(8,"esp"),"edx");
1471 &call ("_x86_AES_set_encrypt_key");
1472 &add ("esp",12);
1473 &cmp ("eax",0);
1474 &je (&label("proceed"));
1475 &ret ();
1476
1477 &set_label("proceed");
1478 &push ("ebp");
1479 &push ("ebx");
1480 &push ("esi");
1481 &push ("edi");
1482
1483 &mov ("esi",&wparam(2));
1484 &mov ("ecx",&DWP(240,"esi")); # pull number of rounds
1485 &lea ("ecx",&DWP(0,"","ecx",4));
1486 &lea ("edi",&DWP(0,"esi","ecx",4)); # pointer to last chunk
1487
1488 &align (4);
1489 &set_label("invert"); # invert order of chunks
1490 &mov ("eax",&DWP(0,"esi"));
1491 &mov ("ebx",&DWP(4,"esi"));
1492 &mov ("ecx",&DWP(0,"edi"));
1493 &mov ("edx",&DWP(4,"edi"));
1494 &mov (&DWP(0,"edi"),"eax");
1495 &mov (&DWP(4,"edi"),"ebx");
1496 &mov (&DWP(0,"esi"),"ecx");
1497 &mov (&DWP(4,"esi"),"edx");
1498 &mov ("eax",&DWP(8,"esi"));
1499 &mov ("ebx",&DWP(12,"esi"));
1500 &mov ("ecx",&DWP(8,"edi"));
1501 &mov ("edx",&DWP(12,"edi"));
1502 &mov (&DWP(8,"edi"),"eax");
1503 &mov (&DWP(12,"edi"),"ebx");
1504 &mov (&DWP(8,"esi"),"ecx");
1505 &mov (&DWP(12,"esi"),"edx");
1506 &add ("esi",16);
1507 &sub ("edi",16);
1508 &cmp ("esi","edi");
1509 &jne (&label("invert"));
1510
1511 &call (&label("pic_point"));
1512 &set_label("pic_point");
1513 blindpop("ebp");
1514 &lea ("edi",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
1515 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
1516
1517 &mov ("esi",&wparam(2));
1518 &mov ("ecx",&DWP(240,"esi")); # pull number of rounds
1519 &dec ("ecx");
1520 &align (4);
1521 &set_label("permute"); # permute the key schedule
1522 &add ("esi",16);
1523 &deckey (0,"esi","ebp","edi");
1524 &deckey (4,"esi","ebp","edi");
1525 &deckey (8,"esi","ebp","edi");
1526 &deckey (12,"esi","ebp","edi");
1527 &dec ("ecx");
1528 &jnz (&label("permute"));
1529
1530 &xor ("eax","eax"); # return success
1531&function_end("AES_set_decrypt_key");
1532
1533&asm_finish();
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-04-10 05:52:38 +0000