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 # ====================================================================
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.
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.
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.
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...
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...
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%.
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.
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.
74 # Current ECB performance numbers for 128-bit key in CPU cycles per
75 # processed byte [measure commonly used by AES benchmarkers] are:
77 # small footprint fully unrolled
83 push(@INC,"perlasm","../../perlasm");
86 &asm_init($ARGV[0],"aes-586.pl",$ARGV[$#ARGV] eq "386");
95 $compromise=0; # $compromise=128 abstains from copying key
96 # schedule to stack when encrypting inputs
97 # shorter than 128 bytes at the cost of
98 # risksing aliasing with S-boxes. In return
99 # you get way better, up to +70%, small block
101 $small_footprint=1; # $small_footprint=1 code is ~5% slower [on
102 # recent µ-archs], but ~5 times smaller!
103 # I favor compact code to minimize cache
104 # contention and in hope to "collect" 5% back
105 # in real-life applications...
106 $vertical_spin=0; # shift "verticaly" defaults to 0, because of
107 # its proof-of-concept status...
109 # Note that there is no decvert(), as well as last encryption round is
110 # performed with "horizontal" shifts. This is because this "vertical"
111 # implementation [one which groups shifts on a given $s[i] to form a
112 # "column," unlike "horizontal" one, which groups shifts on different
113 # $s[i] to form a "row"] is work in progress. It was observed to run
114 # few percents faster on Intel cores, but not AMD. On AMD K8 core it's
115 # whole 12% slower:-( So we face a trade-off... Shall it be resolved
116 # some day? Till then the code is considered experimental and by
117 # default remains dormant...
121 my $v0 = $acc, $v1 = $key;
123 &mov ($v0,$s[3]); # copy s3
124 &mov (&DWP(4,"esp"),$s[2]); # save s2
125 &mov ($v1,$s[0]); # copy s0
126 &mov (&DWP(8,"esp"),$s[1]); # save s1
128 &movz ($s[2],&HB($s[0]));
130 &mov ($s[0],&DWP(0,$te,$s[0],8)); # s0>>0
132 &mov ($s[3],&DWP(3,$te,$s[2],8)); # s0>>8
133 &movz ($s[1],&HB($v1));
135 &mov ($s[2],&DWP(2,$te,$v1,8)); # s0>>16
137 &mov ($s[1],&DWP(1,$te,$s[1],8)); # s0>>24
140 &xor ($s[3],&DWP(0,$te,$v0,8)); # s3>>0
141 &movz ($v0,&HB($v1));
143 &xor ($s[2],&DWP(3,$te,$v0,8)); # s3>>8
144 &movz ($v0,&HB($v1));
146 &xor ($s[1],&DWP(2,$te,$v1,8)); # s3>>16
147 &mov ($v1,&DWP(4,"esp")); # restore s2
148 &xor ($s[0],&DWP(1,$te,$v0,8)); # s3>>24
152 &xor ($s[2],&DWP(0,$te,$v1,8)); # s2>>0
153 &movz ($v1,&HB($v0));
155 &xor ($s[1],&DWP(3,$te,$v1,8)); # s2>>8
156 &movz ($v1,&HB($v0));
158 &xor ($s[0],&DWP(2,$te,$v0,8)); # s2>>16
159 &mov ($v0,&DWP(8,"esp")); # restore s1
160 &xor ($s[3],&DWP(1,$te,$v1,8)); # s2>>24
164 &xor ($s[1],&DWP(0,$te,$v0,8)); # s1>>0
165 &movz ($v0,&HB($v1));
167 &xor ($s[0],&DWP(3,$te,$v0,8)); # s1>>8
168 &movz ($v0,&HB($v1));
170 &xor ($s[3],&DWP(2,$te,$v1,8)); # s1>>16
171 &mov ($key,&DWP(12,"esp")); # reincarnate v1 as key
172 &xor ($s[2],&DWP(1,$te,$v0,8)); # s1>>24
176 { my ($i,$te,@s) = @_;
178 my $out = $i==3?$s[0]:$acc;
180 # lines marked with #%e?x[i] denote "reordered" instructions...
181 if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx
182 else { &mov ($out,$s[0]);
184 if ($i==1) { &shr ($s[0],16); }#%ebx[1]
185 if ($i==2) { &shr ($s[0],24); }#%ecx[2]
186 &mov ($out,&DWP(0,$te,$out,8));
188 if ($i==3) { $tmp=$s[1]; }##%eax
189 &movz ($tmp,&HB($s[1]));
190 &xor ($out,&DWP(3,$te,$tmp,8));
192 if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx
193 else { &mov ($tmp,$s[2]);
195 if ($i==2) { &and ($s[1],0xFF); }#%edx[2]
197 &xor ($out,&DWP(2,$te,$tmp,8));
199 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx
200 elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2]
201 else { &mov ($tmp,$s[3]);
203 &xor ($out,&DWP(1,$te,$tmp,8));
204 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
205 if ($i==3) { &mov ($s[3],$acc); }
212 my $out = $i==3?$s[0]:$acc;
214 if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx
215 else { &mov ($out,$s[0]); }
217 if ($i==1) { &shr ($s[0],16); }#%ebx[1]
218 if ($i==2) { &shr ($s[0],24); }#%ecx[2]
219 &mov ($out,&DWP(2,$te,$out,8));
220 &and ($out,0x000000ff);
222 if ($i==3) { $tmp=$s[1]; }##%eax
223 &movz ($tmp,&HB($s[1]));
224 &mov ($tmp,&DWP(0,$te,$tmp,8));
225 &and ($tmp,0x0000ff00);
228 if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx
229 else { mov ($tmp,$s[2]);
231 if ($i==2) { &and ($s[1],0xFF); }#%edx[2]
233 &mov ($tmp,&DWP(0,$te,$tmp,8));
234 &and ($tmp,0x00ff0000);
237 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx
238 elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2]
239 else { &mov ($tmp,$s[3]);
241 &mov ($tmp,&DWP(2,$te,$tmp,8));
242 &and ($tmp,0xff000000);
244 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
245 if ($i==3) { &mov ($s[3],$acc); }
248 sub _data_word() { my $i; while(defined($i=shift)) { &data_word($i,$i); } }
250 &public_label("AES_Te");
251 &function_begin_B("_x86_AES_encrypt");
252 if ($vertical_spin) {
253 # I need high parts of volatile registers to be accessible...
254 &exch ($s1="edi",$key="ebx");
255 &mov ($s2="esi",$acc="ecx");
258 # note that caller is expected to allocate stack frame for me!
259 &mov (&DWP(12,"esp"),$key); # save key
261 &xor ($s0,&DWP(0,$key)); # xor with key
262 &xor ($s1,&DWP(4,$key));
263 &xor ($s2,&DWP(8,$key));
264 &xor ($s3,&DWP(12,$key));
266 &mov ($acc,&DWP(240,$key)); # load key->rounds
268 if ($small_footprint) {
269 &lea ($acc,&DWP(-2,$acc,$acc));
270 &lea ($acc,&DWP(0,$key,$acc,8));
271 &mov (&DWP(16,"esp"),$acc); # end of key schedule
274 if ($vertical_spin) {
275 &encvert("ebp",$s0,$s1,$s2,$s3);
277 &encstep(0,"ebp",$s0,$s1,$s2,$s3);
278 &encstep(1,"ebp",$s1,$s2,$s3,$s0);
279 &encstep(2,"ebp",$s2,$s3,$s0,$s1);
280 &encstep(3,"ebp",$s3,$s0,$s1,$s2);
282 &add ($key,16); # advance rd_key
283 &xor ($s0,&DWP(0,$key));
284 &xor ($s1,&DWP(4,$key));
285 &xor ($s2,&DWP(8,$key));
286 &xor ($s3,&DWP(12,$key));
287 &cmp ($key,&DWP(16,"esp"));
288 &mov (&DWP(12,"esp"),$key);
289 &jb (&label("loop"));
293 &jle (&label("10rounds"));
295 &jle (&label("12rounds"));
297 &set_label("14rounds");
298 for ($i=1;$i<3;$i++) {
299 if ($vertical_spin) {
300 &encvert("ebp",$s0,$s1,$s2,$s3);
302 &encstep(0,"ebp",$s0,$s1,$s2,$s3);
303 &encstep(1,"ebp",$s1,$s2,$s3,$s0);
304 &encstep(2,"ebp",$s2,$s3,$s0,$s1);
305 &encstep(3,"ebp",$s3,$s0,$s1,$s2);
307 &xor ($s0,&DWP(16*$i+0,$key));
308 &xor ($s1,&DWP(16*$i+4,$key));
309 &xor ($s2,&DWP(16*$i+8,$key));
310 &xor ($s3,&DWP(16*$i+12,$key));
313 &mov (&DWP(12,"esp"),$key); # advance rd_key
314 &set_label("12rounds");
315 for ($i=1;$i<3;$i++) {
316 if ($vertical_spin) {
317 &encvert("ebp",$s0,$s1,$s2,$s3);
319 &encstep(0,"ebp",$s0,$s1,$s2,$s3);
320 &encstep(1,"ebp",$s1,$s2,$s3,$s0);
321 &encstep(2,"ebp",$s2,$s3,$s0,$s1);
322 &encstep(3,"ebp",$s3,$s0,$s1,$s2);
324 &xor ($s0,&DWP(16*$i+0,$key));
325 &xor ($s1,&DWP(16*$i+4,$key));
326 &xor ($s2,&DWP(16*$i+8,$key));
327 &xor ($s3,&DWP(16*$i+12,$key));
330 &mov (&DWP(12,"esp"),$key); # advance rd_key
331 &set_label("10rounds");
332 for ($i=1;$i<10;$i++) {
333 if ($vertical_spin) {
334 &encvert("ebp",$s0,$s1,$s2,$s3);
336 &encstep(0,"ebp",$s0,$s1,$s2,$s3);
337 &encstep(1,"ebp",$s1,$s2,$s3,$s0);
338 &encstep(2,"ebp",$s2,$s3,$s0,$s1);
339 &encstep(3,"ebp",$s3,$s0,$s1,$s2);
341 &xor ($s0,&DWP(16*$i+0,$key));
342 &xor ($s1,&DWP(16*$i+4,$key));
343 &xor ($s2,&DWP(16*$i+8,$key));
344 &xor ($s3,&DWP(16*$i+12,$key));
348 if ($vertical_spin) {
349 # "reincarnate" some registers for "horizontal" spin...
350 &mov ($s1="ebx",$key="edi");
351 &mov ($s2="ecx",$acc="esi");
353 &enclast(0,"ebp",$s0,$s1,$s2,$s3);
354 &enclast(1,"ebp",$s1,$s2,$s3,$s0);
355 &enclast(2,"ebp",$s2,$s3,$s0,$s1);
356 &enclast(3,"ebp",$s3,$s0,$s1,$s2);
358 &add ($key,$small_footprint?16:160);
359 &xor ($s0,&DWP(0,$key));
360 &xor ($s1,&DWP(4,$key));
361 &xor ($s2,&DWP(8,$key));
362 &xor ($s3,&DWP(12,$key));
366 &set_label("AES_Te",64); # Yes! I keep it in the code segment!
367 &_data_word(0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6);
368 &_data_word(0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591);
369 &_data_word(0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56);
370 &_data_word(0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec);
371 &_data_word(0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa);
372 &_data_word(0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb);
373 &_data_word(0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45);
374 &_data_word(0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b);
375 &_data_word(0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c);
376 &_data_word(0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83);
377 &_data_word(0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9);
378 &_data_word(0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a);
379 &_data_word(0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d);
380 &_data_word(0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f);
381 &_data_word(0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df);
382 &_data_word(0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea);
383 &_data_word(0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34);
384 &_data_word(0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b);
385 &_data_word(0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d);
386 &_data_word(0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413);
387 &_data_word(0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1);
388 &_data_word(0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6);
389 &_data_word(0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972);
390 &_data_word(0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85);
391 &_data_word(0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed);
392 &_data_word(0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511);
393 &_data_word(0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe);
394 &_data_word(0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b);
395 &_data_word(0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05);
396 &_data_word(0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1);
397 &_data_word(0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142);
398 &_data_word(0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf);
399 &_data_word(0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3);
400 &_data_word(0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e);
401 &_data_word(0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a);
402 &_data_word(0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6);
403 &_data_word(0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3);
404 &_data_word(0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b);
405 &_data_word(0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428);
406 &_data_word(0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad);
407 &_data_word(0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14);
408 &_data_word(0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8);
409 &_data_word(0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4);
410 &_data_word(0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2);
411 &_data_word(0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda);
412 &_data_word(0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949);
413 &_data_word(0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf);
414 &_data_word(0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810);
415 &_data_word(0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c);
416 &_data_word(0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697);
417 &_data_word(0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e);
418 &_data_word(0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f);
419 &_data_word(0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc);
420 &_data_word(0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c);
421 &_data_word(0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969);
422 &_data_word(0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27);
423 &_data_word(0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122);
424 &_data_word(0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433);
425 &_data_word(0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9);
426 &_data_word(0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5);
427 &_data_word(0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a);
428 &_data_word(0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0);
429 &_data_word(0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e);
430 &_data_word(0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c);
432 &data_word(0x00000001, 0x00000002, 0x00000004, 0x00000008);
433 &data_word(0x00000010, 0x00000020, 0x00000040, 0x00000080);
434 &data_word(0x0000001b, 0x00000036, 0, 0, 0, 0, 0, 0);
435 &function_end_B("_x86_AES_encrypt");
437 # void AES_encrypt (const void *inp,void *out,const AES_KEY *key);
438 &public_label("AES_Te");
439 &function_begin("AES_encrypt");
440 &mov ($acc,&wparam(0)); # load inp
441 &mov ($key,&wparam(2)); # load key
447 &mov (&DWP(16,"esp"),$s0);
449 &call (&label("pic_point")); # make it PIC!
450 &set_label("pic_point");
452 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
454 &mov ($s0,&DWP(0,$acc)); # load input data
455 &mov ($s1,&DWP(4,$acc));
456 &mov ($s2,&DWP(8,$acc));
457 &mov ($s3,&DWP(12,$acc));
459 &call ("_x86_AES_encrypt");
461 &mov ("esp",&DWP(16,"esp"));
463 &mov ($acc,&wparam(1)); # load out
464 &mov (&DWP(0,$acc),$s0); # write output data
465 &mov (&DWP(4,$acc),$s1);
466 &mov (&DWP(8,$acc),$s2);
467 &mov (&DWP(12,$acc),$s3);
468 &function_end("AES_encrypt");
470 #------------------------------------------------------------------#
473 { my ($i,$td,@s) = @_;
475 my $out = $i==3?$s[0]:$acc;
477 # no instructions are reordered, as performance appears
478 # optimal... or rather that all attempts to reorder didn't
479 # result in better performance [which by the way is not a
480 # bit lower than ecryption].
481 if($i==3) { &mov ($key,&DWP(12,"esp")); }
482 else { &mov ($out,$s[0]); }
484 &mov ($out,&DWP(0,$td,$out,8));
486 if ($i==3) { $tmp=$s[1]; }
487 &movz ($tmp,&HB($s[1]));
488 &xor ($out,&DWP(3,$td,$tmp,8));
490 if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); }
491 else { &mov ($tmp,$s[2]); }
494 &xor ($out,&DWP(2,$td,$tmp,8));
496 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }
497 else { &mov ($tmp,$s[3]); }
499 &xor ($out,&DWP(1,$td,$tmp,8));
500 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
501 if ($i==3) { &mov ($s[3],&DWP(4,"esp")); }
508 my $out = $i==3?$s[0]:$acc;
510 if($i==3) { &mov ($key,&DWP(12,"esp")); }
511 else { &mov ($out,$s[0]); }
513 &mov ($out,&DWP(2048,$td,$out,4));
514 &and ($out,0x000000ff);
516 if ($i==3) { $tmp=$s[1]; }
517 &movz ($tmp,&HB($s[1]));
518 &mov ($tmp,&DWP(2048,$td,$tmp,4));
519 &and ($tmp,0x0000ff00);
522 if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); }
523 else { mov ($tmp,$s[2]); }
526 &mov ($tmp,&DWP(2048,$td,$tmp,4));
527 &and ($tmp,0x00ff0000);
530 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }
531 else { &mov ($tmp,$s[3]); }
533 &mov ($tmp,&DWP(2048,$td,$tmp,4));
534 &and ($tmp,0xff000000);
536 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
537 if ($i==3) { &mov ($s[3],&DWP(4,"esp")); }
540 &public_label("AES_Td");
541 &function_begin_B("_x86_AES_decrypt");
542 # note that caller is expected to allocate stack frame for me!
543 &mov (&DWP(12,"esp"),$key); # save key
545 &xor ($s0,&DWP(0,$key)); # xor with key
546 &xor ($s1,&DWP(4,$key));
547 &xor ($s2,&DWP(8,$key));
548 &xor ($s3,&DWP(12,$key));
550 &mov ($acc,&DWP(240,$key)); # load key->rounds
552 if ($small_footprint) {
553 &lea ($acc,&DWP(-2,$acc,$acc));
554 &lea ($acc,&DWP(0,$key,$acc,8));
555 &mov (&DWP(16,"esp"),$acc); # end of key schedule
558 &decstep(0,"ebp",$s0,$s3,$s2,$s1);
559 &decstep(1,"ebp",$s1,$s0,$s3,$s2);
560 &decstep(2,"ebp",$s2,$s1,$s0,$s3);
561 &decstep(3,"ebp",$s3,$s2,$s1,$s0);
562 &add ($key,16); # advance rd_key
563 &xor ($s0,&DWP(0,$key));
564 &xor ($s1,&DWP(4,$key));
565 &xor ($s2,&DWP(8,$key));
566 &xor ($s3,&DWP(12,$key));
567 &cmp ($key,&DWP(16,"esp"));
568 &mov (&DWP(12,"esp"),$key);
569 &jb (&label("loop"));
573 &jle (&label("10rounds"));
575 &jle (&label("12rounds"));
577 &set_label("14rounds");
578 for ($i=1;$i<3;$i++) {
579 &decstep(0,"ebp",$s0,$s3,$s2,$s1);
580 &decstep(1,"ebp",$s1,$s0,$s3,$s2);
581 &decstep(2,"ebp",$s2,$s1,$s0,$s3);
582 &decstep(3,"ebp",$s3,$s2,$s1,$s0);
583 &xor ($s0,&DWP(16*$i+0,$key));
584 &xor ($s1,&DWP(16*$i+4,$key));
585 &xor ($s2,&DWP(16*$i+8,$key));
586 &xor ($s3,&DWP(16*$i+12,$key));
589 &mov (&DWP(12,"esp"),$key); # advance rd_key
590 &set_label("12rounds");
591 for ($i=1;$i<3;$i++) {
592 &decstep(0,"ebp",$s0,$s3,$s2,$s1);
593 &decstep(1,"ebp",$s1,$s0,$s3,$s2);
594 &decstep(2,"ebp",$s2,$s1,$s0,$s3);
595 &decstep(3,"ebp",$s3,$s2,$s1,$s0);
596 &xor ($s0,&DWP(16*$i+0,$key));
597 &xor ($s1,&DWP(16*$i+4,$key));
598 &xor ($s2,&DWP(16*$i+8,$key));
599 &xor ($s3,&DWP(16*$i+12,$key));
602 &mov (&DWP(12,"esp"),$key); # advance rd_key
603 &set_label("10rounds");
604 for ($i=1;$i<10;$i++) {
605 &decstep(0,"ebp",$s0,$s3,$s2,$s1);
606 &decstep(1,"ebp",$s1,$s0,$s3,$s2);
607 &decstep(2,"ebp",$s2,$s1,$s0,$s3);
608 &decstep(3,"ebp",$s3,$s2,$s1,$s0);
609 &xor ($s0,&DWP(16*$i+0,$key));
610 &xor ($s1,&DWP(16*$i+4,$key));
611 &xor ($s2,&DWP(16*$i+8,$key));
612 &xor ($s3,&DWP(16*$i+12,$key));
616 &declast(0,"ebp",$s0,$s3,$s2,$s1);
617 &declast(1,"ebp",$s1,$s0,$s3,$s2);
618 &declast(2,"ebp",$s2,$s1,$s0,$s3);
619 &declast(3,"ebp",$s3,$s2,$s1,$s0);
621 &add ($key,$small_footprint?16:160);
622 &xor ($s0,&DWP(0,$key));
623 &xor ($s1,&DWP(4,$key));
624 &xor ($s2,&DWP(8,$key));
625 &xor ($s3,&DWP(12,$key));
629 &set_label("AES_Td",64); # Yes! I keep it in the code segment!
630 &_data_word(0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a);
631 &_data_word(0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b);
632 &_data_word(0x55fa3020, 0xf66d76ad, 0x9176cc88, 0x254c02f5);
633 &_data_word(0xfcd7e54f, 0xd7cb2ac5, 0x80443526, 0x8fa362b5);
634 &_data_word(0x495ab1de, 0x671bba25, 0x980eea45, 0xe1c0fe5d);
635 &_data_word(0x02752fc3, 0x12f04c81, 0xa397468d, 0xc6f9d36b);
636 &_data_word(0xe75f8f03, 0x959c9215, 0xeb7a6dbf, 0xda595295);
637 &_data_word(0x2d83bed4, 0xd3217458, 0x2969e049, 0x44c8c98e);
638 &_data_word(0x6a89c275, 0x78798ef4, 0x6b3e5899, 0xdd71b927);
639 &_data_word(0xb64fe1be, 0x17ad88f0, 0x66ac20c9, 0xb43ace7d);
640 &_data_word(0x184adf63, 0x82311ae5, 0x60335197, 0x457f5362);
641 &_data_word(0xe07764b1, 0x84ae6bbb, 0x1ca081fe, 0x942b08f9);
642 &_data_word(0x58684870, 0x19fd458f, 0x876cde94, 0xb7f87b52);
643 &_data_word(0x23d373ab, 0xe2024b72, 0x578f1fe3, 0x2aab5566);
644 &_data_word(0x0728ebb2, 0x03c2b52f, 0x9a7bc586, 0xa50837d3);
645 &_data_word(0xf2872830, 0xb2a5bf23, 0xba6a0302, 0x5c8216ed);
646 &_data_word(0x2b1ccf8a, 0x92b479a7, 0xf0f207f3, 0xa1e2694e);
647 &_data_word(0xcdf4da65, 0xd5be0506, 0x1f6234d1, 0x8afea6c4);
648 &_data_word(0x9d532e34, 0xa055f3a2, 0x32e18a05, 0x75ebf6a4);
649 &_data_word(0x39ec830b, 0xaaef6040, 0x069f715e, 0x51106ebd);
650 &_data_word(0xf98a213e, 0x3d06dd96, 0xae053edd, 0x46bde64d);
651 &_data_word(0xb58d5491, 0x055dc471, 0x6fd40604, 0xff155060);
652 &_data_word(0x24fb9819, 0x97e9bdd6, 0xcc434089, 0x779ed967);
653 &_data_word(0xbd42e8b0, 0x888b8907, 0x385b19e7, 0xdbeec879);
654 &_data_word(0x470a7ca1, 0xe90f427c, 0xc91e84f8, 0x00000000);
655 &_data_word(0x83868009, 0x48ed2b32, 0xac70111e, 0x4e725a6c);
656 &_data_word(0xfbff0efd, 0x5638850f, 0x1ed5ae3d, 0x27392d36);
657 &_data_word(0x64d90f0a, 0x21a65c68, 0xd1545b9b, 0x3a2e3624);
658 &_data_word(0xb1670a0c, 0x0fe75793, 0xd296eeb4, 0x9e919b1b);
659 &_data_word(0x4fc5c080, 0xa220dc61, 0x694b775a, 0x161a121c);
660 &_data_word(0x0aba93e2, 0xe52aa0c0, 0x43e0223c, 0x1d171b12);
661 &_data_word(0x0b0d090e, 0xadc78bf2, 0xb9a8b62d, 0xc8a91e14);
662 &_data_word(0x8519f157, 0x4c0775af, 0xbbdd99ee, 0xfd607fa3);
663 &_data_word(0x9f2601f7, 0xbcf5725c, 0xc53b6644, 0x347efb5b);
664 &_data_word(0x7629438b, 0xdcc623cb, 0x68fcedb6, 0x63f1e4b8);
665 &_data_word(0xcadc31d7, 0x10856342, 0x40229713, 0x2011c684);
666 &_data_word(0x7d244a85, 0xf83dbbd2, 0x1132f9ae, 0x6da129c7);
667 &_data_word(0x4b2f9e1d, 0xf330b2dc, 0xec52860d, 0xd0e3c177);
668 &_data_word(0x6c16b32b, 0x99b970a9, 0xfa489411, 0x2264e947);
669 &_data_word(0xc48cfca8, 0x1a3ff0a0, 0xd82c7d56, 0xef903322);
670 &_data_word(0xc74e4987, 0xc1d138d9, 0xfea2ca8c, 0x360bd498);
671 &_data_word(0xcf81f5a6, 0x28de7aa5, 0x268eb7da, 0xa4bfad3f);
672 &_data_word(0xe49d3a2c, 0x0d927850, 0x9bcc5f6a, 0x62467e54);
673 &_data_word(0xc2138df6, 0xe8b8d890, 0x5ef7392e, 0xf5afc382);
674 &_data_word(0xbe805d9f, 0x7c93d069, 0xa92dd56f, 0xb31225cf);
675 &_data_word(0x3b99acc8, 0xa77d1810, 0x6e639ce8, 0x7bbb3bdb);
676 &_data_word(0x097826cd, 0xf418596e, 0x01b79aec, 0xa89a4f83);
677 &_data_word(0x656e95e6, 0x7ee6ffaa, 0x08cfbc21, 0xe6e815ef);
678 &_data_word(0xd99be7ba, 0xce366f4a, 0xd4099fea, 0xd67cb029);
679 &_data_word(0xafb2a431, 0x31233f2a, 0x3094a5c6, 0xc066a235);
680 &_data_word(0x37bc4e74, 0xa6ca82fc, 0xb0d090e0, 0x15d8a733);
681 &_data_word(0x4a9804f1, 0xf7daec41, 0x0e50cd7f, 0x2ff69117);
682 &_data_word(0x8dd64d76, 0x4db0ef43, 0x544daacc, 0xdf0496e4);
683 &_data_word(0xe3b5d19e, 0x1b886a4c, 0xb81f2cc1, 0x7f516546);
684 &_data_word(0x04ea5e9d, 0x5d358c01, 0x737487fa, 0x2e410bfb);
685 &_data_word(0x5a1d67b3, 0x52d2db92, 0x335610e9, 0x1347d66d);
686 &_data_word(0x8c61d79a, 0x7a0ca137, 0x8e14f859, 0x893c13eb);
687 &_data_word(0xee27a9ce, 0x35c961b7, 0xede51ce1, 0x3cb1477a);
688 &_data_word(0x59dfd29c, 0x3f73f255, 0x79ce1418, 0xbf37c773);
689 &_data_word(0xeacdf753, 0x5baafd5f, 0x146f3ddf, 0x86db4478);
690 &_data_word(0x81f3afca, 0x3ec468b9, 0x2c342438, 0x5f40a3c2);
691 &_data_word(0x72c31d16, 0x0c25e2bc, 0x8b493c28, 0x41950dff);
692 &_data_word(0x7101a839, 0xdeb30c08, 0x9ce4b4d8, 0x90c15664);
693 &_data_word(0x6184cb7b, 0x70b632d5, 0x745c6c48, 0x4257b8d0);
695 &data_word(0x52525252, 0x09090909, 0x6a6a6a6a, 0xd5d5d5d5);
696 &data_word(0x30303030, 0x36363636, 0xa5a5a5a5, 0x38383838);
697 &data_word(0xbfbfbfbf, 0x40404040, 0xa3a3a3a3, 0x9e9e9e9e);
698 &data_word(0x81818181, 0xf3f3f3f3, 0xd7d7d7d7, 0xfbfbfbfb);
699 &data_word(0x7c7c7c7c, 0xe3e3e3e3, 0x39393939, 0x82828282);
700 &data_word(0x9b9b9b9b, 0x2f2f2f2f, 0xffffffff, 0x87878787);
701 &data_word(0x34343434, 0x8e8e8e8e, 0x43434343, 0x44444444);
702 &data_word(0xc4c4c4c4, 0xdededede, 0xe9e9e9e9, 0xcbcbcbcb);
703 &data_word(0x54545454, 0x7b7b7b7b, 0x94949494, 0x32323232);
704 &data_word(0xa6a6a6a6, 0xc2c2c2c2, 0x23232323, 0x3d3d3d3d);
705 &data_word(0xeeeeeeee, 0x4c4c4c4c, 0x95959595, 0x0b0b0b0b);
706 &data_word(0x42424242, 0xfafafafa, 0xc3c3c3c3, 0x4e4e4e4e);
707 &data_word(0x08080808, 0x2e2e2e2e, 0xa1a1a1a1, 0x66666666);
708 &data_word(0x28282828, 0xd9d9d9d9, 0x24242424, 0xb2b2b2b2);
709 &data_word(0x76767676, 0x5b5b5b5b, 0xa2a2a2a2, 0x49494949);
710 &data_word(0x6d6d6d6d, 0x8b8b8b8b, 0xd1d1d1d1, 0x25252525);
711 &data_word(0x72727272, 0xf8f8f8f8, 0xf6f6f6f6, 0x64646464);
712 &data_word(0x86868686, 0x68686868, 0x98989898, 0x16161616);
713 &data_word(0xd4d4d4d4, 0xa4a4a4a4, 0x5c5c5c5c, 0xcccccccc);
714 &data_word(0x5d5d5d5d, 0x65656565, 0xb6b6b6b6, 0x92929292);
715 &data_word(0x6c6c6c6c, 0x70707070, 0x48484848, 0x50505050);
716 &data_word(0xfdfdfdfd, 0xedededed, 0xb9b9b9b9, 0xdadadada);
717 &data_word(0x5e5e5e5e, 0x15151515, 0x46464646, 0x57575757);
718 &data_word(0xa7a7a7a7, 0x8d8d8d8d, 0x9d9d9d9d, 0x84848484);
719 &data_word(0x90909090, 0xd8d8d8d8, 0xabababab, 0x00000000);
720 &data_word(0x8c8c8c8c, 0xbcbcbcbc, 0xd3d3d3d3, 0x0a0a0a0a);
721 &data_word(0xf7f7f7f7, 0xe4e4e4e4, 0x58585858, 0x05050505);
722 &data_word(0xb8b8b8b8, 0xb3b3b3b3, 0x45454545, 0x06060606);
723 &data_word(0xd0d0d0d0, 0x2c2c2c2c, 0x1e1e1e1e, 0x8f8f8f8f);
724 &data_word(0xcacacaca, 0x3f3f3f3f, 0x0f0f0f0f, 0x02020202);
725 &data_word(0xc1c1c1c1, 0xafafafaf, 0xbdbdbdbd, 0x03030303);
726 &data_word(0x01010101, 0x13131313, 0x8a8a8a8a, 0x6b6b6b6b);
727 &data_word(0x3a3a3a3a, 0x91919191, 0x11111111, 0x41414141);
728 &data_word(0x4f4f4f4f, 0x67676767, 0xdcdcdcdc, 0xeaeaeaea);
729 &data_word(0x97979797, 0xf2f2f2f2, 0xcfcfcfcf, 0xcececece);
730 &data_word(0xf0f0f0f0, 0xb4b4b4b4, 0xe6e6e6e6, 0x73737373);
731 &data_word(0x96969696, 0xacacacac, 0x74747474, 0x22222222);
732 &data_word(0xe7e7e7e7, 0xadadadad, 0x35353535, 0x85858585);
733 &data_word(0xe2e2e2e2, 0xf9f9f9f9, 0x37373737, 0xe8e8e8e8);
734 &data_word(0x1c1c1c1c, 0x75757575, 0xdfdfdfdf, 0x6e6e6e6e);
735 &data_word(0x47474747, 0xf1f1f1f1, 0x1a1a1a1a, 0x71717171);
736 &data_word(0x1d1d1d1d, 0x29292929, 0xc5c5c5c5, 0x89898989);
737 &data_word(0x6f6f6f6f, 0xb7b7b7b7, 0x62626262, 0x0e0e0e0e);
738 &data_word(0xaaaaaaaa, 0x18181818, 0xbebebebe, 0x1b1b1b1b);
739 &data_word(0xfcfcfcfc, 0x56565656, 0x3e3e3e3e, 0x4b4b4b4b);
740 &data_word(0xc6c6c6c6, 0xd2d2d2d2, 0x79797979, 0x20202020);
741 &data_word(0x9a9a9a9a, 0xdbdbdbdb, 0xc0c0c0c0, 0xfefefefe);
742 &data_word(0x78787878, 0xcdcdcdcd, 0x5a5a5a5a, 0xf4f4f4f4);
743 &data_word(0x1f1f1f1f, 0xdddddddd, 0xa8a8a8a8, 0x33333333);
744 &data_word(0x88888888, 0x07070707, 0xc7c7c7c7, 0x31313131);
745 &data_word(0xb1b1b1b1, 0x12121212, 0x10101010, 0x59595959);
746 &data_word(0x27272727, 0x80808080, 0xecececec, 0x5f5f5f5f);
747 &data_word(0x60606060, 0x51515151, 0x7f7f7f7f, 0xa9a9a9a9);
748 &data_word(0x19191919, 0xb5b5b5b5, 0x4a4a4a4a, 0x0d0d0d0d);
749 &data_word(0x2d2d2d2d, 0xe5e5e5e5, 0x7a7a7a7a, 0x9f9f9f9f);
750 &data_word(0x93939393, 0xc9c9c9c9, 0x9c9c9c9c, 0xefefefef);
751 &data_word(0xa0a0a0a0, 0xe0e0e0e0, 0x3b3b3b3b, 0x4d4d4d4d);
752 &data_word(0xaeaeaeae, 0x2a2a2a2a, 0xf5f5f5f5, 0xb0b0b0b0);
753 &data_word(0xc8c8c8c8, 0xebebebeb, 0xbbbbbbbb, 0x3c3c3c3c);
754 &data_word(0x83838383, 0x53535353, 0x99999999, 0x61616161);
755 &data_word(0x17171717, 0x2b2b2b2b, 0x04040404, 0x7e7e7e7e);
756 &data_word(0xbabababa, 0x77777777, 0xd6d6d6d6, 0x26262626);
757 &data_word(0xe1e1e1e1, 0x69696969, 0x14141414, 0x63636363);
758 &data_word(0x55555555, 0x21212121, 0x0c0c0c0c, 0x7d7d7d7d);
759 &function_end_B("_x86_AES_decrypt");
761 # void AES_decrypt (const void *inp,void *out,const AES_KEY *key);
762 &public_label("AES_Td");
763 &function_begin("AES_decrypt");
764 &mov ($acc,&wparam(0)); # load inp
765 &mov ($key,&wparam(2)); # load key
771 &mov (&DWP(16,"esp"),$s0);
773 &call (&label("pic_point")); # make it PIC!
774 &set_label("pic_point");
776 &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
778 &mov ($s0,&DWP(0,$acc)); # load input data
779 &mov ($s1,&DWP(4,$acc));
780 &mov ($s2,&DWP(8,$acc));
781 &mov ($s3,&DWP(12,$acc));
783 &call ("_x86_AES_decrypt");
785 &mov ("esp",&DWP(16,"esp"));
787 &mov ($acc,&wparam(1)); # load out
788 &mov (&DWP(0,$acc),$s0); # write output data
789 &mov (&DWP(4,$acc),$s1);
790 &mov (&DWP(8,$acc),$s2);
791 &mov (&DWP(12,$acc),$s3);
792 &function_end("AES_decrypt");
794 # void AES_cbc_encrypt (const void char *inp, unsigned char *out,
795 # size_t length, const AES_KEY *key,
796 # unsigned char *ivp,const int enc);
799 # -4(%esp) 0(%esp) return address
800 # 0(%esp) 4(%esp) tmp1
801 # 4(%esp) 8(%esp) tmp2
802 # 8(%esp) 12(%esp) key
803 # 12(%esp) 16(%esp) end of key schedule
804 my $_esp=&DWP(16,"esp"); #saved %esp
805 my $_inp=&DWP(20,"esp"); #copy of wparam(0)
806 my $_out=&DWP(24,"esp"); #copy of wparam(1)
807 my $_len=&DWP(28,"esp"); #copy of wparam(2)
808 my $_key=&DWP(32,"esp"); #copy of wparam(3)
809 my $_ivp=&DWP(36,"esp"); #copy of wparam(4)
810 my $_tmp=&DWP(40,"esp"); #volatile variable
811 my $ivec=&DWP(44,"esp"); #ivec[16]
812 my $aes_key=&DWP(60,"esp"); #copy of aes_key
813 my $mark=&DWP(60+240,"esp"); #copy of aes_key->rounds
815 &public_label("AES_Te");
816 &public_label("AES_Td");
817 &function_begin("AES_cbc_encrypt");
818 &mov ($s2 eq "ecx"? $s2 : "",&wparam(2)); # load len
820 &je (&label("enc_out"));
822 &call (&label("pic_point")); # make it PIC!
823 &set_label("pic_point");
830 &je (&label("DECRYPT"));
832 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
834 # allocate aligned stack frame...
835 &lea ($key,&DWP(-64-244,"esp"));
838 # ... and make sure it doesn't alias with AES_Te modulo 4096
840 &lea ($s1,&DWP(2048,"ebp"));
842 &and ($s0,0xfff); # s = %ebp&0xfff
843 &and ($s1,0xfff); # e = (%ebp+2048)&0xfff
844 &and ($s3,0xfff); # p = %esp&0xfff
846 &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e);
847 &jb (&label("te_break_out"));
850 &jmp (&label("te_ok"));
851 &set_label("te_break_out"); # else %esp -= (p-s)&0xfff + framesz;
859 &mov ($s0,&wparam(0)); # load inp
860 &mov ($s1,&wparam(1)); # load out
861 &mov ($s3,&wparam(3)); # load key
862 &mov ($acc,&wparam(4)); # load ivp
865 &add ("esp",4); # reserve for return address!
866 &mov ($_esp,$key); # save %esp
868 &mov ($_inp,$s0); # save copy of inp
869 &mov ($_out,$s1); # save copy of out
870 &mov ($_len,$s2); # save copy of len
871 &mov ($_key,$s3); # save copy of key
872 &mov ($_ivp,$acc); # save copy of ivp
874 &mov ($mark,0); # copy of aes_key->rounds = 0;
876 &cmp ($s2,$compromise);
877 &jb (&label("skip_ecopy"));
879 # do we copy key schedule to stack?
880 &mov ($s1 eq "ebx" ? $s1 : "",$s3);
881 &mov ($s2 eq "ecx" ? $s2 : "",244/4);
885 &lea ("edi",$aes_key);
887 &jb (&label("do_ecopy"));
889 &jb (&label("skip_ecopy"));
891 &set_label("do_ecopy");
893 &data_word(0xA5F3F689); # rep movsd
894 &set_label("skip_ecopy");
899 &set_label("prefetch_te");
900 &mov ($s0,&DWP(0,"ebp"));
901 &mov ($s1,&DWP(32,"ebp"));
902 &mov ($s2,&DWP(64,"ebp"));
903 &mov ($s3,&DWP(96,"ebp"));
904 &lea ("ebp",&DWP(128,"ebp"));
906 &jnz (&label("prefetch_te"));
911 &test ($s2,0xFFFFFFF0);
912 &jz (&label("enc_tail")); # short input...
914 &mov ($s0,&DWP(0,$key)); # load iv
915 &mov ($s1,&DWP(4,$key));
918 &set_label("enc_loop");
919 &mov ($s2,&DWP(8,$key));
920 &mov ($s3,&DWP(12,$key));
922 &xor ($s0,&DWP(0,$acc)); # xor input data
923 &xor ($s1,&DWP(4,$acc));
924 &xor ($s2,&DWP(8,$acc));
925 &xor ($s3,&DWP(12,$acc));
927 &mov ($key,$_key); # load key
928 &call ("_x86_AES_encrypt");
930 &mov ($acc,$_inp); # load inp
931 &mov ($key,$_out); # load out
933 &mov (&DWP(0,$key),$s0); # save output data
934 &mov (&DWP(4,$key),$s1);
935 &mov (&DWP(8,$key),$s2);
936 &mov (&DWP(12,$key),$s3);
938 &mov ($s2,$_len); # load len
940 &lea ($acc,&DWP(16,$acc));
941 &mov ($_inp,$acc); # save inp
943 &lea ($s3,&DWP(16,$key));
944 &mov ($_out,$s3); # save out
947 &test ($s2,0xFFFFFFF0);
948 &mov ($_len,$s2); # save len
949 &jnz (&label("enc_loop"));
951 &jnz (&label("enc_tail"));
952 &mov ($acc,$_ivp); # load ivp
953 &mov ($s2,&DWP(8,$key)); # restore last dwords
954 &mov ($s3,&DWP(12,$key));
955 &mov (&DWP(0,$acc),$s0); # save ivec
956 &mov (&DWP(4,$acc),$s1);
957 &mov (&DWP(8,$acc),$s2);
958 &mov (&DWP(12,$acc),$s3);
960 &cmp ($mark,0); # was the key schedule copied?
963 &je (&label("skip_ezero"));
964 # zero copy of key schedule
968 &data_word(0xABF3F689); # rep stosd
969 &set_label("skip_ezero")
971 &set_label("enc_out");
973 &pushf (); # kludge, never executed
976 &set_label("enc_tail");
977 &push ($key eq "edi" ? $key : ""); # push ivp
978 &mov ($key,$_out); # load out
981 &cmp ($key,$acc); # compare with inp
982 &je (&label("enc_in_place"));
984 &data_word(0xA4F3F689); # rep movsb # copy input
985 &jmp (&label("enc_skip_in_place"));
986 &set_label("enc_in_place");
987 &lea ($key,&DWP(0,$key,$s2));
988 &set_label("enc_skip_in_place");
992 &data_word(0xAAF3F689); # rep stosb # zero tail
993 &pop ($key); # pop ivp
995 &mov ($acc,$_out); # output as input
996 &mov ($s0,&DWP(0,$key));
997 &mov ($s1,&DWP(4,$key));
998 &mov ($_len,16); # len=16
999 &jmp (&label("enc_loop")); # one more spin...
1001 #----------------------------- DECRYPT -----------------------------#
1003 &set_label("DECRYPT");
1004 &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
1006 # allocate aligned stack frame...
1007 &lea ($key,&DWP(-64-244,"esp"));
1010 # ... and make sure it doesn't alias with AES_Td modulo 4096
1012 &lea ($s1,&DWP(3072,"ebp"));
1014 &and ($s0,0xfff); # s = %ebp&0xfff
1015 &and ($s1,0xfff); # e = (%ebp+3072)&0xfff
1016 &and ($s3,0xfff); # p = %esp&0xfff
1018 &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e);
1019 &jb (&label("td_break_out"));
1022 &jmp (&label("td_ok"));
1023 &set_label("td_break_out"); # else %esp -= (p-s)&0xfff + framesz;
1029 &set_label("td_ok");
1031 &mov ($s0,&wparam(0)); # load inp
1032 &mov ($s1,&wparam(1)); # load out
1033 &mov ($s3,&wparam(3)); # load key
1034 &mov ($acc,&wparam(4)); # load ivp
1037 &add ("esp",4); # reserve for return address!
1038 &mov ($_esp,$key); # save %esp
1040 &mov ($_inp,$s0); # save copy of inp
1041 &mov ($_out,$s1); # save copy of out
1042 &mov ($_len,$s2); # save copy of len
1043 &mov ($_key,$s3); # save copy of key
1044 &mov ($_ivp,$acc); # save copy of ivp
1046 &mov ($mark,0); # copy of aes_key->rounds = 0;
1048 &cmp ($s2,$compromise);
1049 &jb (&label("skip_dcopy"));
1051 # do we copy key schedule to stack?
1052 &mov ($s1 eq "ebx" ? $s1 : "",$s3);
1053 &mov ($s2 eq "ecx" ? $s2 : "",244/4);
1057 &lea ("edi",$aes_key);
1059 &jb (&label("do_dcopy"));
1060 &cmp ($s1,4096-244);
1061 &jb (&label("skip_dcopy"));
1063 &set_label("do_dcopy");
1065 &data_word(0xA5F3F689); # rep movsd
1066 &set_label("skip_dcopy");
1071 &set_label("prefetch_td");
1072 &mov ($s0,&DWP(0,"ebp"));
1073 &mov ($s1,&DWP(32,"ebp"));
1074 &mov ($s2,&DWP(64,"ebp"));
1075 &mov ($s3,&DWP(96,"ebp"));
1076 &lea ("ebp",&DWP(128,"ebp"));
1078 &jnz (&label("prefetch_td"));
1082 &je (&label("dec_in_place")); # in-place processing...
1084 &mov ($key,$_ivp); # load ivp
1088 &set_label("dec_loop");
1089 &mov ($s0,&DWP(0,$acc)); # read input
1090 &mov ($s1,&DWP(4,$acc));
1091 &mov ($s2,&DWP(8,$acc));
1092 &mov ($s3,&DWP(12,$acc));
1094 &mov ($key,$_key); # load key
1095 &call ("_x86_AES_decrypt");
1097 &mov ($key,$_tmp); # load ivp
1098 &mov ($acc,$_len); # load len
1099 &xor ($s0,&DWP(0,$key)); # xor iv
1100 &xor ($s1,&DWP(4,$key));
1101 &xor ($s2,&DWP(8,$key));
1102 &xor ($s3,&DWP(12,$key));
1105 &jc (&label("dec_partial"));
1106 &mov ($_len,$acc); # save len
1107 &mov ($acc,$_inp); # load inp
1108 &mov ($key,$_out); # load out
1110 &mov (&DWP(0,$key),$s0); # write output
1111 &mov (&DWP(4,$key),$s1);
1112 &mov (&DWP(8,$key),$s2);
1113 &mov (&DWP(12,$key),$s3);
1115 &mov ($_tmp,$acc); # save ivp
1116 &lea ($acc,&DWP(16,$acc));
1117 &mov ($_inp,$acc); # save inp
1119 &lea ($key,&DWP(16,$key));
1120 &mov ($_out,$key); # save out
1122 &jnz (&label("dec_loop"));
1123 &mov ($key,$_tmp); # load temp ivp
1124 &set_label("dec_end");
1125 &mov ($acc,$_ivp); # load user ivp
1126 &mov ($s0,&DWP(0,$key)); # load iv
1127 &mov ($s1,&DWP(4,$key));
1128 &mov ($s2,&DWP(8,$key));
1129 &mov ($s3,&DWP(12,$key));
1130 &mov (&DWP(0,$acc),$s0); # copy back to user
1131 &mov (&DWP(4,$acc),$s1);
1132 &mov (&DWP(8,$acc),$s2);
1133 &mov (&DWP(12,$acc),$s3);
1134 &jmp (&label("dec_out"));
1137 &set_label("dec_partial");
1139 &mov (&DWP(0,$key),$s0); # dump output to stack
1140 &mov (&DWP(4,$key),$s1);
1141 &mov (&DWP(8,$key),$s2);
1142 &mov (&DWP(12,$key),$s3);
1143 &lea ($s2 eq "ecx" ? $s2 : "",&DWP(16,$acc));
1144 &mov ($acc eq "esi" ? $acc : "",$key);
1145 &mov ($key eq "edi" ? $key : "",$_out); # load out
1146 &data_word(0xA4F3F689); # rep movsb # copy output
1147 &mov ($key,$_inp); # use inp as temp ivp
1148 &jmp (&label("dec_end"));
1151 &set_label("dec_in_place");
1152 &set_label("dec_in_place_loop");
1154 &mov ($s0,&DWP(0,$acc)); # read input
1155 &mov ($s1,&DWP(4,$acc));
1156 &mov ($s2,&DWP(8,$acc));
1157 &mov ($s3,&DWP(12,$acc));
1159 &mov (&DWP(0,$key),$s0); # copy to temp
1160 &mov (&DWP(4,$key),$s1);
1161 &mov (&DWP(8,$key),$s2);
1162 &mov (&DWP(12,$key),$s3);
1164 &mov ($key,$_key); # load key
1165 &call ("_x86_AES_decrypt");
1167 &mov ($key,$_ivp); # load ivp
1168 &mov ($acc,$_out); # load out
1169 &xor ($s0,&DWP(0,$key)); # xor iv
1170 &xor ($s1,&DWP(4,$key));
1171 &xor ($s2,&DWP(8,$key));
1172 &xor ($s3,&DWP(12,$key));
1174 &mov (&DWP(0,$acc),$s0); # write output
1175 &mov (&DWP(4,$acc),$s1);
1176 &mov (&DWP(8,$acc),$s2);
1177 &mov (&DWP(12,$acc),$s3);
1179 &lea ($acc,&DWP(16,$acc));
1180 &mov ($_out,$acc); # save out
1183 &mov ($s0,&DWP(0,$acc)); # read temp
1184 &mov ($s1,&DWP(4,$acc));
1185 &mov ($s2,&DWP(8,$acc));
1186 &mov ($s3,&DWP(12,$acc));
1188 &mov (&DWP(0,$key),$s0); # copy iv
1189 &mov (&DWP(4,$key),$s1);
1190 &mov (&DWP(8,$key),$s2);
1191 &mov (&DWP(12,$key),$s3);
1193 &mov ($acc,$_inp); # load inp
1195 &lea ($acc,&DWP(16,$acc));
1196 &mov ($_inp,$acc); # save inp
1198 &mov ($s2,$_len); # load len
1200 &jc (&label("dec_in_place_partial"));
1201 &mov ($_len,$s2); # save len
1202 &jnz (&label("dec_in_place_loop"));
1203 &jmp (&label("dec_out"));
1206 &set_label("dec_in_place_partial");
1207 # one can argue if this is actually required...
1208 &mov ($key eq "edi" ? $key : "",$_out);
1209 &lea ($acc eq "esi" ? $acc : "",$ivec);
1210 &lea ($key,&DWP(0,$key,$s2));
1211 &lea ($acc,&DWP(16,$acc,$s2));
1212 &neg ($s2 eq "ecx" ? $s2 : "");
1213 &data_word(0xA4F3F689); # rep movsb # restore tail
1216 &set_label("dec_out");
1217 &cmp ($mark,0); # was the key schedule copied?
1220 &je (&label("skip_dzero"));
1221 # zero copy of key schedule
1225 &data_word(0xABF3F689); # rep stosd
1226 &set_label("skip_dzero")
1228 &function_end("AES_cbc_encrypt");
1231 #------------------------------------------------------------------#
1235 &movz ("esi",&LB("edx")); # rk[i]>>0
1236 &mov ("ebx",&DWP(2,"ebp","esi",8));
1237 &movz ("esi",&HB("edx")); # rk[i]>>8
1238 &and ("ebx",0xFF000000);
1241 &mov ("ebx",&DWP(2,"ebp","esi",8));
1243 &and ("ebx",0x000000FF);
1244 &movz ("esi",&LB("edx")); # rk[i]>>16
1247 &mov ("ebx",&DWP(0,"ebp","esi",8));
1248 &movz ("esi",&HB("edx")); # rk[i]>>24
1249 &and ("ebx",0x0000FF00);
1252 &mov ("ebx",&DWP(0,"ebp","esi",8));
1253 &and ("ebx",0x00FF0000);
1256 &xor ("eax",&DWP(2048,"ebp","ecx",4)); # rcon
1259 # int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
1261 &public_label("AES_Te");
1262 &function_begin("AES_set_encrypt_key");
1263 &mov ("esi",&wparam(0)); # user supplied key
1264 &mov ("edi",&wparam(2)); # private key schedule
1267 &jz (&label("badpointer"));
1269 &jz (&label("badpointer"));
1271 &call (&label("pic_point"));
1272 &set_label("pic_point");
1274 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
1276 &mov ("ecx",&wparam(1)); # number of bits in key
1278 &je (&label("10rounds"));
1280 &je (&label("12rounds"));
1282 &je (&label("14rounds"));
1283 &mov ("eax",-2); # invalid number of bits
1284 &jmp (&label("exit"));
1286 &set_label("10rounds");
1287 &mov ("eax",&DWP(0,"esi")); # copy first 4 dwords
1288 &mov ("ebx",&DWP(4,"esi"));
1289 &mov ("ecx",&DWP(8,"esi"));
1290 &mov ("edx",&DWP(12,"esi"));
1291 &mov (&DWP(0,"edi"),"eax");
1292 &mov (&DWP(4,"edi"),"ebx");
1293 &mov (&DWP(8,"edi"),"ecx");
1294 &mov (&DWP(12,"edi"),"edx");
1297 &jmp (&label("10shortcut"));
1300 &set_label("10loop");
1301 &mov ("eax",&DWP(0,"edi")); # rk[0]
1302 &mov ("edx",&DWP(12,"edi")); # rk[3]
1303 &set_label("10shortcut");
1306 &mov (&DWP(16,"edi"),"eax"); # rk[4]
1307 &xor ("eax",&DWP(4,"edi"));
1308 &mov (&DWP(20,"edi"),"eax"); # rk[5]
1309 &xor ("eax",&DWP(8,"edi"));
1310 &mov (&DWP(24,"edi"),"eax"); # rk[6]
1311 &xor ("eax",&DWP(12,"edi"));
1312 &mov (&DWP(28,"edi"),"eax"); # rk[7]
1316 &jl (&label("10loop"));
1318 &mov (&DWP(80,"edi"),10); # setup number of rounds
1320 &jmp (&label("exit"));
1322 &set_label("12rounds");
1323 &mov ("eax",&DWP(0,"esi")); # copy first 6 dwords
1324 &mov ("ebx",&DWP(4,"esi"));
1325 &mov ("ecx",&DWP(8,"esi"));
1326 &mov ("edx",&DWP(12,"esi"));
1327 &mov (&DWP(0,"edi"),"eax");
1328 &mov (&DWP(4,"edi"),"ebx");
1329 &mov (&DWP(8,"edi"),"ecx");
1330 &mov (&DWP(12,"edi"),"edx");
1331 &mov ("ecx",&DWP(16,"esi"));
1332 &mov ("edx",&DWP(20,"esi"));
1333 &mov (&DWP(16,"edi"),"ecx");
1334 &mov (&DWP(20,"edi"),"edx");
1337 &jmp (&label("12shortcut"));
1340 &set_label("12loop");
1341 &mov ("eax",&DWP(0,"edi")); # rk[0]
1342 &mov ("edx",&DWP(20,"edi")); # rk[5]
1343 &set_label("12shortcut");
1346 &mov (&DWP(24,"edi"),"eax"); # rk[6]
1347 &xor ("eax",&DWP(4,"edi"));
1348 &mov (&DWP(28,"edi"),"eax"); # rk[7]
1349 &xor ("eax",&DWP(8,"edi"));
1350 &mov (&DWP(32,"edi"),"eax"); # rk[8]
1351 &xor ("eax",&DWP(12,"edi"));
1352 &mov (&DWP(36,"edi"),"eax"); # rk[9]
1355 &je (&label("12break"));
1358 &xor ("eax",&DWP(16,"edi"));
1359 &mov (&DWP(40,"edi"),"eax"); # rk[10]
1360 &xor ("eax",&DWP(20,"edi"));
1361 &mov (&DWP(44,"edi"),"eax"); # rk[11]
1364 &jmp (&label("12loop"));
1366 &set_label("12break");
1367 &mov (&DWP(72,"edi"),12); # setup number of rounds
1369 &jmp (&label("exit"));
1371 &set_label("14rounds");
1372 &mov ("eax",&DWP(0,"esi")); # copy first 8 dwords
1373 &mov ("ebx",&DWP(4,"esi"));
1374 &mov ("ecx",&DWP(8,"esi"));
1375 &mov ("edx",&DWP(12,"esi"));
1376 &mov (&DWP(0,"edi"),"eax");
1377 &mov (&DWP(4,"edi"),"ebx");
1378 &mov (&DWP(8,"edi"),"ecx");
1379 &mov (&DWP(12,"edi"),"edx");
1380 &mov ("eax",&DWP(16,"esi"));
1381 &mov ("ebx",&DWP(20,"esi"));
1382 &mov ("ecx",&DWP(24,"esi"));
1383 &mov ("edx",&DWP(28,"esi"));
1384 &mov (&DWP(16,"edi"),"eax");
1385 &mov (&DWP(20,"edi"),"ebx");
1386 &mov (&DWP(24,"edi"),"ecx");
1387 &mov (&DWP(28,"edi"),"edx");
1390 &jmp (&label("14shortcut"));
1393 &set_label("14loop");
1394 &mov ("edx",&DWP(28,"edi")); # rk[7]
1395 &set_label("14shortcut");
1396 &mov ("eax",&DWP(0,"edi")); # rk[0]
1400 &mov (&DWP(32,"edi"),"eax"); # rk[8]
1401 &xor ("eax",&DWP(4,"edi"));
1402 &mov (&DWP(36,"edi"),"eax"); # rk[9]
1403 &xor ("eax",&DWP(8,"edi"));
1404 &mov (&DWP(40,"edi"),"eax"); # rk[10]
1405 &xor ("eax",&DWP(12,"edi"));
1406 &mov (&DWP(44,"edi"),"eax"); # rk[11]
1409 &je (&label("14break"));
1413 &mov ("eax",&DWP(16,"edi")); # rk[4]
1414 &movz ("esi",&LB("edx")); # rk[11]>>0
1415 &mov ("ebx",&DWP(2,"ebp","esi",8));
1416 &movz ("esi",&HB("edx")); # rk[11]>>8
1417 &and ("ebx",0x000000FF);
1420 &mov ("ebx",&DWP(0,"ebp","esi",8));
1422 &and ("ebx",0x0000FF00);
1423 &movz ("esi",&LB("edx")); # rk[11]>>16
1426 &mov ("ebx",&DWP(0,"ebp","esi",8));
1427 &movz ("esi",&HB("edx")); # rk[11]>>24
1428 &and ("ebx",0x00FF0000);
1431 &mov ("ebx",&DWP(2,"ebp","esi",8));
1432 &and ("ebx",0xFF000000);
1435 &mov (&DWP(48,"edi"),"eax"); # rk[12]
1436 &xor ("eax",&DWP(20,"edi"));
1437 &mov (&DWP(52,"edi"),"eax"); # rk[13]
1438 &xor ("eax",&DWP(24,"edi"));
1439 &mov (&DWP(56,"edi"),"eax"); # rk[14]
1440 &xor ("eax",&DWP(28,"edi"));
1441 &mov (&DWP(60,"edi"),"eax"); # rk[15]
1444 &jmp (&label("14loop"));
1446 &set_label("14break");
1447 &mov (&DWP(48,"edi"),14); # setup number of rounds
1449 &jmp (&label("exit"));
1451 &set_label("badpointer");
1454 &function_end("AES_set_encrypt_key");
1457 { my ($i,$ptr,$te,$td) = @_;
1459 &mov ("eax",&DWP($i,$ptr));
1461 &movz ("ebx",&HB("eax"));
1464 &movz ("eax",&BP(2,$te,"eax",8));
1465 &movz ("ebx",&BP(2,$te,"ebx",8));
1466 &mov ("eax",&DWP(0,$td,"eax",8));
1467 &xor ("eax",&DWP(3,$td,"ebx",8));
1468 &movz ("ebx",&HB("edx"));
1470 &movz ("edx",&BP(2,$te,"edx",8));
1471 &movz ("ebx",&BP(2,$te,"ebx",8));
1472 &xor ("eax",&DWP(2,$td,"edx",8));
1473 &xor ("eax",&DWP(1,$td,"ebx",8));
1474 &mov (&DWP($i,$ptr),"eax");
1477 # int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
1479 &public_label("AES_Td");
1480 &public_label("AES_Te");
1481 &function_begin_B("AES_set_decrypt_key");
1482 &mov ("eax",&wparam(0));
1483 &mov ("ecx",&wparam(1));
1484 &mov ("edx",&wparam(2));
1486 &mov (&DWP(0,"esp"),"eax");
1487 &mov (&DWP(4,"esp"),"ecx");
1488 &mov (&DWP(8,"esp"),"edx");
1489 &call ("AES_set_encrypt_key");
1492 &je (&label("proceed"));
1495 &set_label("proceed");
1501 &mov ("esi",&wparam(2));
1502 &mov ("ecx",&DWP(240,"esi")); # pull number of rounds
1503 &lea ("ecx",&DWP(0,"","ecx",4));
1504 &lea ("edi",&DWP(0,"esi","ecx",4)); # pointer to last chunk
1507 &set_label("invert"); # invert order of chunks
1508 &mov ("eax",&DWP(0,"esi"));
1509 &mov ("ebx",&DWP(4,"esi"));
1510 &mov ("ecx",&DWP(0,"edi"));
1511 &mov ("edx",&DWP(4,"edi"));
1512 &mov (&DWP(0,"edi"),"eax");
1513 &mov (&DWP(4,"edi"),"ebx");
1514 &mov (&DWP(0,"esi"),"ecx");
1515 &mov (&DWP(4,"esi"),"edx");
1516 &mov ("eax",&DWP(8,"esi"));
1517 &mov ("ebx",&DWP(12,"esi"));
1518 &mov ("ecx",&DWP(8,"edi"));
1519 &mov ("edx",&DWP(12,"edi"));
1520 &mov (&DWP(8,"edi"),"eax");
1521 &mov (&DWP(12,"edi"),"ebx");
1522 &mov (&DWP(8,"esi"),"ecx");
1523 &mov (&DWP(12,"esi"),"edx");
1527 &jne (&label("invert"));
1529 &call (&label("pic_point"));
1530 &set_label("pic_point");
1532 &lea ("edi",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
1533 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
1535 &mov ("esi",&wparam(2));
1536 &mov ("ecx",&DWP(240,"esi")); # pull number of rounds
1539 &set_label("permute"); # permute the key schedule
1541 &deckey (0,"esi","ebp","edi");
1542 &deckey (4,"esi","ebp","edi");
1543 &deckey (8,"esi","ebp","edi");
1544 &deckey (12,"esi","ebp","edi");
1546 &jnz (&label("permute"));
1548 &xor ("eax","eax"); # return success
1549 &function_end("AES_set_decrypt_key");