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1#!/usr/bin/env perl
2
3######################################################################
4## Constant-time SSSE3 AES core implementation.
5## version 0.1
6##
7## By Mike Hamburg (Stanford University), 2009
8## Public domain.
9##
10## For details see http://shiftleft.org/papers/vector_aes/ and
11## http://crypto.stanford.edu/vpaes/.
12
13######################################################################
14# September 2011.
15#
16# Port vpaes-x86_64.pl as 32-bit "almost" drop-in replacement for
17# aes-586.pl. "Almost" refers to the fact that AES_cbc_encrypt
18# doesn't handle partial vectors (doesn't have to if called from
19# EVP only). "Drop-in" implies that this module doesn't share key
20# schedule structure with the original nor does it make assumption
21# about its alignment...
22#
23# Performance summary. aes-586.pl column lists large-block CBC
24# encrypt/decrypt/with-hyper-threading-off(*) results in cycles per
25# byte processed with 128-bit key, and vpaes-x86.pl column - [also
26# large-block CBC] encrypt/decrypt.
27#
28# aes-586.pl vpaes-x86.pl
29#
30# Core 2(**) 29.1/42.3/18.3 22.0/25.6(***)
31# Nehalem 27.9/40.4/18.1 10.3/12.0
32# Atom 102./119./60.1 64.5/85.3(***)
33#
34# (*) "Hyper-threading" in the context refers rather to cache shared
35# among multiple cores, than to specifically Intel HTT. As vast
36# majority of contemporary cores share cache, slower code path
37# is common place. In other words "with-hyper-threading-off"
38# results are presented mostly for reference purposes.
39#
40# (**) "Core 2" refers to initial 65nm design, a.k.a. Conroe.
41#
42# (***) Less impressive improvement on Core 2 and Atom is due to slow
43# pshufb, yet it's respectable +32%/65% improvement on Core 2
44# and +58%/40% on Atom (as implied, over "hyper-threading-safe"
45# code path).
46#
47# <appro@openssl.org>
48
49$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
50push(@INC,"${dir}","${dir}../../perlasm");
51require "x86asm.pl";
52
53&asm_init($ARGV[0],"vpaes-x86.pl",$x86only = $ARGV[$#ARGV] eq "386");
54
55$PREFIX="vpaes";
56
57my ($round, $base, $magic, $key, $const, $inp, $out)=
58 ("eax", "ebx", "ecx", "edx","ebp", "esi","edi");
59
60&static_label("_vpaes_consts");
61&static_label("_vpaes_schedule_low_round");
62
63&set_label("_vpaes_consts",64);
64$k_inv=-0x30; # inv, inva
65 &data_word(0x0D080180,0x0E05060F,0x0A0B0C02,0x04070309);
66 &data_word(0x0F0B0780,0x01040A06,0x02050809,0x030D0E0C);
67
68$k_s0F=-0x10; # s0F
69 &data_word(0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F);
70
71$k_ipt=0x00; # input transform (lo, hi)
72 &data_word(0x5A2A7000,0xC2B2E898,0x52227808,0xCABAE090);
73 &data_word(0x317C4D00,0x4C01307D,0xB0FDCC81,0xCD80B1FC);
74
75$k_sb1=0x20; # sb1u, sb1t
76 &data_word(0xCB503E00,0xB19BE18F,0x142AF544,0xA5DF7A6E);
77 &data_word(0xFAE22300,0x3618D415,0x0D2ED9EF,0x3BF7CCC1);
78$k_sb2=0x40; # sb2u, sb2t
79 &data_word(0x0B712400,0xE27A93C6,0xBC982FCD,0x5EB7E955);
80 &data_word(0x0AE12900,0x69EB8840,0xAB82234A,0xC2A163C8);
81$k_sbo=0x60; # sbou, sbot
82 &data_word(0x6FBDC700,0xD0D26D17,0xC502A878,0x15AABF7A);
83 &data_word(0x5FBB6A00,0xCFE474A5,0x412B35FA,0x8E1E90D1);
84
85$k_mc_forward=0x80; # mc_forward
86 &data_word(0x00030201,0x04070605,0x080B0A09,0x0C0F0E0D);
87 &data_word(0x04070605,0x080B0A09,0x0C0F0E0D,0x00030201);
88 &data_word(0x080B0A09,0x0C0F0E0D,0x00030201,0x04070605);
89 &data_word(0x0C0F0E0D,0x00030201,0x04070605,0x080B0A09);
90
91$k_mc_backward=0xc0; # mc_backward
92 &data_word(0x02010003,0x06050407,0x0A09080B,0x0E0D0C0F);
93 &data_word(0x0E0D0C0F,0x02010003,0x06050407,0x0A09080B);
94 &data_word(0x0A09080B,0x0E0D0C0F,0x02010003,0x06050407);
95 &data_word(0x06050407,0x0A09080B,0x0E0D0C0F,0x02010003);
96
97$k_sr=0x100; # sr
98 &data_word(0x03020100,0x07060504,0x0B0A0908,0x0F0E0D0C);
99 &data_word(0x0F0A0500,0x030E0904,0x07020D08,0x0B06010C);
100 &data_word(0x0B020900,0x0F060D04,0x030A0108,0x070E050C);
101 &data_word(0x070A0D00,0x0B0E0104,0x0F020508,0x0306090C);
102
103$k_rcon=0x140; # rcon
104 &data_word(0xAF9DEEB6,0x1F8391B9,0x4D7C7D81,0x702A9808);
105
106$k_s63=0x150; # s63: all equal to 0x63 transformed
107 &data_word(0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B);
108
109$k_opt=0x160; # output transform
110 &data_word(0xD6B66000,0xFF9F4929,0xDEBE6808,0xF7974121);
111 &data_word(0x50BCEC00,0x01EDBD51,0xB05C0CE0,0xE10D5DB1);
112
113$k_deskew=0x180; # deskew tables: inverts the sbox's "skew"
114 &data_word(0x47A4E300,0x07E4A340,0x5DBEF91A,0x1DFEB95A);
115 &data_word(0x83EA6900,0x5F36B5DC,0xF49D1E77,0x2841C2AB);
116##
117## Decryption stuff
118## Key schedule constants
119##
120$k_dksd=0x1a0; # decryption key schedule: invskew x*D
121 &data_word(0xA3E44700,0xFEB91A5D,0x5A1DBEF9,0x0740E3A4);
122 &data_word(0xB5368300,0x41C277F4,0xAB289D1E,0x5FDC69EA);
123$k_dksb=0x1c0; # decryption key schedule: invskew x*B
124 &data_word(0x8550D500,0x9A4FCA1F,0x1CC94C99,0x03D65386);
125 &data_word(0xB6FC4A00,0x115BEDA7,0x7E3482C8,0xD993256F);
126$k_dkse=0x1e0; # decryption key schedule: invskew x*E + 0x63
127 &data_word(0x1FC9D600,0xD5031CCA,0x994F5086,0x53859A4C);
128 &data_word(0x4FDC7BE8,0xA2319605,0x20B31487,0xCD5EF96A);
129$k_dks9=0x200; # decryption key schedule: invskew x*9
130 &data_word(0x7ED9A700,0xB6116FC8,0x82255BFC,0x4AED9334);
131 &data_word(0x27143300,0x45765162,0xE9DAFDCE,0x8BB89FAC);
132
133##
134## Decryption stuff
135## Round function constants
136##
137$k_dipt=0x220; # decryption input transform
138 &data_word(0x0B545F00,0x0F505B04,0x114E451A,0x154A411E);
139 &data_word(0x60056500,0x86E383E6,0xF491F194,0x12771772);
140
141$k_dsb9=0x240; # decryption sbox output *9*u, *9*t
142 &data_word(0x9A86D600,0x851C0353,0x4F994CC9,0xCAD51F50);
143 &data_word(0xECD74900,0xC03B1789,0xB2FBA565,0x725E2C9E);
144$k_dsbd=0x260; # decryption sbox output *D*u, *D*t
145 &data_word(0xE6B1A200,0x7D57CCDF,0x882A4439,0xF56E9B13);
146 &data_word(0x24C6CB00,0x3CE2FAF7,0x15DEEFD3,0x2931180D);
147$k_dsbb=0x280; # decryption sbox output *B*u, *B*t
148 &data_word(0x96B44200,0xD0226492,0xB0F2D404,0x602646F6);
149 &data_word(0xCD596700,0xC19498A6,0x3255AA6B,0xF3FF0C3E);
150$k_dsbe=0x2a0; # decryption sbox output *E*u, *E*t
151 &data_word(0x26D4D000,0x46F29296,0x64B4F6B0,0x22426004);
152 &data_word(0xFFAAC100,0x0C55A6CD,0x98593E32,0x9467F36B);
153$k_dsbo=0x2c0; # decryption sbox final output
154 &data_word(0x7EF94000,0x1387EA53,0xD4943E2D,0xC7AA6DB9);
155 &data_word(0x93441D00,0x12D7560F,0xD8C58E9C,0xCA4B8159);
156&asciz ("Vector Permutation AES for x86/SSSE3, Mike Hamburg (Stanford University)");
157&align (64);
158
159&function_begin_B("_vpaes_preheat");
160 &add ($const,&DWP(0,"esp"));
161 &movdqa ("xmm7",&QWP($k_inv,$const));
162 &movdqa ("xmm6",&QWP($k_s0F,$const));
163 &ret ();
164&function_end_B("_vpaes_preheat");
165
166##
167## _aes_encrypt_core
168##
169## AES-encrypt %xmm0.
170##
171## Inputs:
172## %xmm0 = input
173## %xmm6-%xmm7 as in _vpaes_preheat
174## (%edx) = scheduled keys
175##
176## Output in %xmm0
177## Clobbers %xmm1-%xmm5, %eax, %ebx, %ecx, %edx
178##
179##
180&function_begin_B("_vpaes_encrypt_core");
181 &mov ($magic,16);
182 &mov ($round,&DWP(240,$key));
183 &movdqa ("xmm1","xmm6")
184 &movdqa ("xmm2",&QWP($k_ipt,$const));
185 &pandn ("xmm1","xmm0");
186 &movdqu ("xmm5",&QWP(0,$key));
187 &psrld ("xmm1",4);
188 &pand ("xmm0","xmm6");
189 &pshufb ("xmm2","xmm0");
190 &movdqa ("xmm0",&QWP($k_ipt+16,$const));
191 &pshufb ("xmm0","xmm1");
192 &pxor ("xmm2","xmm5");
193 &pxor ("xmm0","xmm2");
194 &add ($key,16);
195 &lea ($base,&DWP($k_mc_backward,$const));
196 &jmp (&label("enc_entry"));
197
198
199&set_label("enc_loop",16);
200 # middle of middle round
201 &movdqa ("xmm4",&QWP($k_sb1,$const)); # 4 : sb1u
202 &pshufb ("xmm4","xmm2"); # 4 = sb1u
203 &pxor ("xmm4","xmm5"); # 4 = sb1u + k
204 &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sb1t
205 &pshufb ("xmm0","xmm3"); # 0 = sb1t
206 &pxor ("xmm0","xmm4"); # 0 = A
207 &movdqa ("xmm5",&QWP($k_sb2,$const)); # 4 : sb2u
208 &pshufb ("xmm5","xmm2"); # 4 = sb2u
209 &movdqa ("xmm1",&QWP(-0x40,$base,$magic));# .Lk_mc_forward[]
210 &movdqa ("xmm2",&QWP($k_sb2+16,$const));# 2 : sb2t
211 &pshufb ("xmm2","xmm3"); # 2 = sb2t
212 &pxor ("xmm2","xmm5"); # 2 = 2A
213 &movdqa ("xmm4",&QWP(0,$base,$magic)); # .Lk_mc_backward[]
214 &movdqa ("xmm3","xmm0"); # 3 = A
215 &pshufb ("xmm0","xmm1"); # 0 = B
216 &add ($key,16); # next key
217 &pxor ("xmm0","xmm2"); # 0 = 2A+B
218 &pshufb ("xmm3","xmm4"); # 3 = D
219 &add ($magic,16); # next mc
220 &pxor ("xmm3","xmm0"); # 3 = 2A+B+D
221 &pshufb ("xmm0","xmm1"); # 0 = 2B+C
222 &and ($magic,0x30); # ... mod 4
223 &pxor ("xmm0","xmm3"); # 0 = 2A+3B+C+D
224 &sub ($round,1); # nr--
225
226&set_label("enc_entry");
227 # top of round
228 &movdqa ("xmm1","xmm6"); # 1 : i
229 &pandn ("xmm1","xmm0"); # 1 = i<<4
230 &psrld ("xmm1",4); # 1 = i
231 &pand ("xmm0","xmm6"); # 0 = k
232 &movdqa ("xmm5",&QWP($k_inv+16,$const));# 2 : a/k
233 &pshufb ("xmm5","xmm0"); # 2 = a/k
234 &pxor ("xmm0","xmm1"); # 0 = j
235 &movdqa ("xmm3","xmm7"); # 3 : 1/i
236 &pshufb ("xmm3","xmm1"); # 3 = 1/i
237 &pxor ("xmm3","xmm5"); # 3 = iak = 1/i + a/k
238 &movdqa ("xmm4","xmm7"); # 4 : 1/j
239 &pshufb ("xmm4","xmm0"); # 4 = 1/j
240 &pxor ("xmm4","xmm5"); # 4 = jak = 1/j + a/k
241 &movdqa ("xmm2","xmm7"); # 2 : 1/iak
242 &pshufb ("xmm2","xmm3"); # 2 = 1/iak
243 &pxor ("xmm2","xmm0"); # 2 = io
244 &movdqa ("xmm3","xmm7"); # 3 : 1/jak
245 &movdqu ("xmm5",&QWP(0,$key));
246 &pshufb ("xmm3","xmm4"); # 3 = 1/jak
247 &pxor ("xmm3","xmm1"); # 3 = jo
248 &jnz (&label("enc_loop"));
249
250 # middle of last round
251 &movdqa ("xmm4",&QWP($k_sbo,$const)); # 3 : sbou .Lk_sbo
252 &movdqa ("xmm0",&QWP($k_sbo+16,$const));# 3 : sbot .Lk_sbo+16
253 &pshufb ("xmm4","xmm2"); # 4 = sbou
254 &pxor ("xmm4","xmm5"); # 4 = sb1u + k
255 &pshufb ("xmm0","xmm3"); # 0 = sb1t
256 &movdqa ("xmm1",&QWP(0x40,$base,$magic));# .Lk_sr[]
257 &pxor ("xmm0","xmm4"); # 0 = A
258 &pshufb ("xmm0","xmm1");
259 &ret ();
260&function_end_B("_vpaes_encrypt_core");
261
262##
263## Decryption core
264##
265## Same API as encryption core.
266##
267&function_begin_B("_vpaes_decrypt_core");
268 &mov ($round,&DWP(240,$key));
269 &lea ($base,&DWP($k_dsbd,$const));
270 &movdqa ("xmm1","xmm6");
271 &movdqa ("xmm2",&QWP($k_dipt-$k_dsbd,$base));
272 &pandn ("xmm1","xmm0");
273 &mov ($magic,$round);
274 &psrld ("xmm1",4)
275 &movdqu ("xmm5",&QWP(0,$key));
276 &shl ($magic,4);
277 &pand ("xmm0","xmm6");
278 &pshufb ("xmm2","xmm0");
279 &movdqa ("xmm0",&QWP($k_dipt-$k_dsbd+16,$base));
280 &xor ($magic,0x30);
281 &pshufb ("xmm0","xmm1");
282 &and ($magic,0x30);
283 &pxor ("xmm2","xmm5");
284 &movdqa ("xmm5",&QWP($k_mc_forward+48,$const));
285 &pxor ("xmm0","xmm2");
286 &add ($key,16);
287 &lea ($magic,&DWP($k_sr-$k_dsbd,$base,$magic));
288 &jmp (&label("dec_entry"));
289
290&set_label("dec_loop",16);
291##
292## Inverse mix columns
293##
294 &movdqa ("xmm4",&QWP(-0x20,$base)); # 4 : sb9u
295 &pshufb ("xmm4","xmm2"); # 4 = sb9u
296 &pxor ("xmm4","xmm0");
297 &movdqa ("xmm0",&QWP(-0x10,$base)); # 0 : sb9t
298 &pshufb ("xmm0","xmm3"); # 0 = sb9t
299 &pxor ("xmm0","xmm4"); # 0 = ch
300 &add ($key,16); # next round key
301
302 &pshufb ("xmm0","xmm5"); # MC ch
303 &movdqa ("xmm4",&QWP(0,$base)); # 4 : sbdu
304 &pshufb ("xmm4","xmm2"); # 4 = sbdu
305 &pxor ("xmm4","xmm0"); # 4 = ch
306 &movdqa ("xmm0",&QWP(0x10,$base)); # 0 : sbdt
307 &pshufb ("xmm0","xmm3"); # 0 = sbdt
308 &pxor ("xmm0","xmm4"); # 0 = ch
309 &sub ($round,1); # nr--
310
311 &pshufb ("xmm0","xmm5"); # MC ch
312 &movdqa ("xmm4",&QWP(0x20,$base)); # 4 : sbbu
313 &pshufb ("xmm4","xmm2"); # 4 = sbbu
314 &pxor ("xmm4","xmm0"); # 4 = ch
315 &movdqa ("xmm0",&QWP(0x30,$base)); # 0 : sbbt
316 &pshufb ("xmm0","xmm3"); # 0 = sbbt
317 &pxor ("xmm0","xmm4"); # 0 = ch
318
319 &pshufb ("xmm0","xmm5"); # MC ch
320 &movdqa ("xmm4",&QWP(0x40,$base)); # 4 : sbeu
321 &pshufb ("xmm4","xmm2"); # 4 = sbeu
322 &pxor ("xmm4","xmm0"); # 4 = ch
323 &movdqa ("xmm0",&QWP(0x50,$base)); # 0 : sbet
324 &pshufb ("xmm0","xmm3"); # 0 = sbet
325 &pxor ("xmm0","xmm4"); # 0 = ch
326
327 &palignr("xmm5","xmm5",12);
328
329&set_label("dec_entry");
330 # top of round
331 &movdqa ("xmm1","xmm6"); # 1 : i
332 &pandn ("xmm1","xmm0"); # 1 = i<<4
333 &psrld ("xmm1",4); # 1 = i
334 &pand ("xmm0","xmm6"); # 0 = k
335 &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k
336 &pshufb ("xmm2","xmm0"); # 2 = a/k
337 &pxor ("xmm0","xmm1"); # 0 = j
338 &movdqa ("xmm3","xmm7"); # 3 : 1/i
339 &pshufb ("xmm3","xmm1"); # 3 = 1/i
340 &pxor ("xmm3","xmm2"); # 3 = iak = 1/i + a/k
341 &movdqa ("xmm4","xmm7"); # 4 : 1/j
342 &pshufb ("xmm4","xmm0"); # 4 = 1/j
343 &pxor ("xmm4","xmm2"); # 4 = jak = 1/j + a/k
344 &movdqa ("xmm2","xmm7"); # 2 : 1/iak
345 &pshufb ("xmm2","xmm3"); # 2 = 1/iak
346 &pxor ("xmm2","xmm0"); # 2 = io
347 &movdqa ("xmm3","xmm7"); # 3 : 1/jak
348 &pshufb ("xmm3","xmm4"); # 3 = 1/jak
349 &pxor ("xmm3","xmm1"); # 3 = jo
350 &movdqu ("xmm0",&QWP(0,$key));
351 &jnz (&label("dec_loop"));
352
353 # middle of last round
354 &movdqa ("xmm4",&QWP(0x60,$base)); # 3 : sbou
355 &pshufb ("xmm4","xmm2"); # 4 = sbou
356 &pxor ("xmm4","xmm0"); # 4 = sb1u + k
357 &movdqa ("xmm0",&QWP(0x70,$base)); # 0 : sbot
358 &movdqa ("xmm2",&QWP(0,$magic));
359 &pshufb ("xmm0","xmm3"); # 0 = sb1t
360 &pxor ("xmm0","xmm4"); # 0 = A
361 &pshufb ("xmm0","xmm2");
362 &ret ();
363&function_end_B("_vpaes_decrypt_core");
364
365########################################################
366## ##
367## AES key schedule ##
368## ##
369########################################################
370&function_begin_B("_vpaes_schedule_core");
371 &add ($const,&DWP(0,"esp"));
372 &movdqu ("xmm0",&QWP(0,$inp)); # load key (unaligned)
373 &movdqa ("xmm2",&QWP($k_rcon,$const)); # load rcon
374
375 # input transform
376 &movdqa ("xmm3","xmm0");
377 &lea ($base,&DWP($k_ipt,$const));
378 &movdqa (&QWP(4,"esp"),"xmm2"); # xmm8
379 &call ("_vpaes_schedule_transform");
380 &movdqa ("xmm7","xmm0");
381
382 &test ($out,$out);
383 &jnz (&label("schedule_am_decrypting"));
384
385 # encrypting, output zeroth round key after transform
386 &movdqu (&QWP(0,$key),"xmm0");
387 &jmp (&label("schedule_go"));
388
389&set_label("schedule_am_decrypting");
390 # decrypting, output zeroth round key after shiftrows
391 &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
392 &pshufb ("xmm3","xmm1");
393 &movdqu (&QWP(0,$key),"xmm3");
394 &xor ($magic,0x30);
395
396&set_label("schedule_go");
397 &cmp ($round,192);
398 &ja (&label("schedule_256"));
399 &je (&label("schedule_192"));
400 # 128: fall though
401
402##
403## .schedule_128
404##
405## 128-bit specific part of key schedule.
406##
407## This schedule is really simple, because all its parts
408## are accomplished by the subroutines.
409##
410&set_label("schedule_128");
411 &mov ($round,10);
412
413&set_label("loop_schedule_128");
414 &call ("_vpaes_schedule_round");
415 &dec ($round);
416 &jz (&label("schedule_mangle_last"));
417 &call ("_vpaes_schedule_mangle"); # write output
418 &jmp (&label("loop_schedule_128"));
419
420##
421## .aes_schedule_192
422##
423## 192-bit specific part of key schedule.
424##
425## The main body of this schedule is the same as the 128-bit
426## schedule, but with more smearing. The long, high side is
427## stored in %xmm7 as before, and the short, low side is in
428## the high bits of %xmm6.
429##
430## This schedule is somewhat nastier, however, because each
431## round produces 192 bits of key material, or 1.5 round keys.
432## Therefore, on each cycle we do 2 rounds and produce 3 round
433## keys.
434##
435&set_label("schedule_192",16);
436 &movdqu ("xmm0",&QWP(8,$inp)); # load key part 2 (very unaligned)
437 &call ("_vpaes_schedule_transform"); # input transform
438 &movdqa ("xmm6","xmm0"); # save short part
439 &pxor ("xmm4","xmm4"); # clear 4
440 &movhlps("xmm6","xmm4"); # clobber low side with zeros
441 &mov ($round,4);
442
443&set_label("loop_schedule_192");
444 &call ("_vpaes_schedule_round");
445 &palignr("xmm0","xmm6",8);
446 &call ("_vpaes_schedule_mangle"); # save key n
447 &call ("_vpaes_schedule_192_smear");
448 &call ("_vpaes_schedule_mangle"); # save key n+1
449 &call ("_vpaes_schedule_round");
450 &dec ($round);
451 &jz (&label("schedule_mangle_last"));
452 &call ("_vpaes_schedule_mangle"); # save key n+2
453 &call ("_vpaes_schedule_192_smear");
454 &jmp (&label("loop_schedule_192"));
455
456##
457## .aes_schedule_256
458##
459## 256-bit specific part of key schedule.
460##
461## The structure here is very similar to the 128-bit
462## schedule, but with an additional "low side" in
463## %xmm6. The low side's rounds are the same as the
464## high side's, except no rcon and no rotation.
465##
466&set_label("schedule_256",16);
467 &movdqu ("xmm0",&QWP(16,$inp)); # load key part 2 (unaligned)
468 &call ("_vpaes_schedule_transform"); # input transform
469 &mov ($round,7);
470
471&set_label("loop_schedule_256");
472 &call ("_vpaes_schedule_mangle"); # output low result
473 &movdqa ("xmm6","xmm0"); # save cur_lo in xmm6
474
475 # high round
476 &call ("_vpaes_schedule_round");
477 &dec ($round);
478 &jz (&label("schedule_mangle_last"));
479 &call ("_vpaes_schedule_mangle");
480
481 # low round. swap xmm7 and xmm6
482 &pshufd ("xmm0","xmm0",0xFF);
483 &movdqa (&QWP(20,"esp"),"xmm7");
484 &movdqa ("xmm7","xmm6");
485 &call ("_vpaes_schedule_low_round");
486 &movdqa ("xmm7",&QWP(20,"esp"));
487
488 &jmp (&label("loop_schedule_256"));
489
490##
491## .aes_schedule_mangle_last
492##
493## Mangler for last round of key schedule
494## Mangles %xmm0
495## when encrypting, outputs out(%xmm0) ^ 63
496## when decrypting, outputs unskew(%xmm0)
497##
498## Always called right before return... jumps to cleanup and exits
499##
500&set_label("schedule_mangle_last",16);
501 # schedule last round key from xmm0
502 &lea ($base,&DWP($k_deskew,$const));
503 &test ($out,$out);
504 &jnz (&label("schedule_mangle_last_dec"));
505
506 # encrypting
507 &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
508 &pshufb ("xmm0","xmm1"); # output permute
509 &lea ($base,&DWP($k_opt,$const)); # prepare to output transform
510 &add ($key,32);
511
512&set_label("schedule_mangle_last_dec");
513 &add ($key,-16);
514 &pxor ("xmm0",&QWP($k_s63,$const));
515 &call ("_vpaes_schedule_transform"); # output transform
516 &movdqu (&QWP(0,$key),"xmm0"); # save last key
517
518 # cleanup
519 &pxor ("xmm0","xmm0");
520 &pxor ("xmm1","xmm1");
521 &pxor ("xmm2","xmm2");
522 &pxor ("xmm3","xmm3");
523 &pxor ("xmm4","xmm4");
524 &pxor ("xmm5","xmm5");
525 &pxor ("xmm6","xmm6");
526 &pxor ("xmm7","xmm7");
527 &ret ();
528&function_end_B("_vpaes_schedule_core");
529
530##
531## .aes_schedule_192_smear
532##
533## Smear the short, low side in the 192-bit key schedule.
534##
535## Inputs:
536## %xmm7: high side, b a x y
537## %xmm6: low side, d c 0 0
538## %xmm13: 0
539##
540## Outputs:
541## %xmm6: b+c+d b+c 0 0
542## %xmm0: b+c+d b+c b a
543##
544&function_begin_B("_vpaes_schedule_192_smear");
545 &pshufd ("xmm0","xmm6",0x80); # d c 0 0 -> c 0 0 0
546 &pxor ("xmm6","xmm0"); # -> c+d c 0 0
547 &pshufd ("xmm0","xmm7",0xFE); # b a _ _ -> b b b a
548 &pxor ("xmm6","xmm0"); # -> b+c+d b+c b a
549 &movdqa ("xmm0","xmm6");
550 &pxor ("xmm1","xmm1");
551 &movhlps("xmm6","xmm1"); # clobber low side with zeros
552 &ret ();
553&function_end_B("_vpaes_schedule_192_smear");
554
555##
556## .aes_schedule_round
557##
558## Runs one main round of the key schedule on %xmm0, %xmm7
559##
560## Specifically, runs subbytes on the high dword of %xmm0
561## then rotates it by one byte and xors into the low dword of
562## %xmm7.
563##
564## Adds rcon from low byte of %xmm8, then rotates %xmm8 for
565## next rcon.
566##
567## Smears the dwords of %xmm7 by xoring the low into the
568## second low, result into third, result into highest.
569##
570## Returns results in %xmm7 = %xmm0.
571## Clobbers %xmm1-%xmm5.
572##
573&function_begin_B("_vpaes_schedule_round");
574 # extract rcon from xmm8
575 &movdqa ("xmm2",&QWP(8,"esp")); # xmm8
576 &pxor ("xmm1","xmm1");
577 &palignr("xmm1","xmm2",15);
578 &palignr("xmm2","xmm2",15);
579 &pxor ("xmm7","xmm1");
580
581 # rotate
582 &pshufd ("xmm0","xmm0",0xFF);
583 &palignr("xmm0","xmm0",1);
584
585 # fall through...
586 &movdqa (&QWP(8,"esp"),"xmm2"); # xmm8
587
588 # low round: same as high round, but no rotation and no rcon.
589&set_label("_vpaes_schedule_low_round");
590 # smear xmm7
591 &movdqa ("xmm1","xmm7");
592 &pslldq ("xmm7",4);
593 &pxor ("xmm7","xmm1");
594 &movdqa ("xmm1","xmm7");
595 &pslldq ("xmm7",8);
596 &pxor ("xmm7","xmm1");
597 &pxor ("xmm7",&QWP($k_s63,$const));
598
599 # subbyte
600 &movdqa ("xmm4",&QWP($k_s0F,$const));
601 &movdqa ("xmm5",&QWP($k_inv,$const)); # 4 : 1/j
602 &movdqa ("xmm1","xmm4");
603 &pandn ("xmm1","xmm0");
604 &psrld ("xmm1",4); # 1 = i
605 &pand ("xmm0","xmm4"); # 0 = k
606 &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k
607 &pshufb ("xmm2","xmm0"); # 2 = a/k
608 &pxor ("xmm0","xmm1"); # 0 = j
609 &movdqa ("xmm3","xmm5"); # 3 : 1/i
610 &pshufb ("xmm3","xmm1"); # 3 = 1/i
611 &pxor ("xmm3","xmm2"); # 3 = iak = 1/i + a/k
612 &movdqa ("xmm4","xmm5"); # 4 : 1/j
613 &pshufb ("xmm4","xmm0"); # 4 = 1/j
614 &pxor ("xmm4","xmm2"); # 4 = jak = 1/j + a/k
615 &movdqa ("xmm2","xmm5"); # 2 : 1/iak
616 &pshufb ("xmm2","xmm3"); # 2 = 1/iak
617 &pxor ("xmm2","xmm0"); # 2 = io
618 &movdqa ("xmm3","xmm5"); # 3 : 1/jak
619 &pshufb ("xmm3","xmm4"); # 3 = 1/jak
620 &pxor ("xmm3","xmm1"); # 3 = jo
621 &movdqa ("xmm4",&QWP($k_sb1,$const)); # 4 : sbou
622 &pshufb ("xmm4","xmm2"); # 4 = sbou
623 &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sbot
624 &pshufb ("xmm0","xmm3"); # 0 = sb1t
625 &pxor ("xmm0","xmm4"); # 0 = sbox output
626
627 # add in smeared stuff
628 &pxor ("xmm0","xmm7");
629 &movdqa ("xmm7","xmm0");
630 &ret ();
631&function_end_B("_vpaes_schedule_round");
632
633##
634## .aes_schedule_transform
635##
636## Linear-transform %xmm0 according to tables at (%ebx)
637##
638## Output in %xmm0
639## Clobbers %xmm1, %xmm2
640##
641&function_begin_B("_vpaes_schedule_transform");
642 &movdqa ("xmm2",&QWP($k_s0F,$const));
643 &movdqa ("xmm1","xmm2");
644 &pandn ("xmm1","xmm0");
645 &psrld ("xmm1",4);
646 &pand ("xmm0","xmm2");
647 &movdqa ("xmm2",&QWP(0,$base));
648 &pshufb ("xmm2","xmm0");
649 &movdqa ("xmm0",&QWP(16,$base));
650 &pshufb ("xmm0","xmm1");
651 &pxor ("xmm0","xmm2");
652 &ret ();
653&function_end_B("_vpaes_schedule_transform");
654
655##
656## .aes_schedule_mangle
657##
658## Mangle xmm0 from (basis-transformed) standard version
659## to our version.
660##
661## On encrypt,
662## xor with 0x63
663## multiply by circulant 0,1,1,1
664## apply shiftrows transform
665##
666## On decrypt,
667## xor with 0x63
668## multiply by "inverse mixcolumns" circulant E,B,D,9
669## deskew
670## apply shiftrows transform
671##
672##
673## Writes out to (%edx), and increments or decrements it
674## Keeps track of round number mod 4 in %ecx
675## Preserves xmm0
676## Clobbers xmm1-xmm5
677##
678&function_begin_B("_vpaes_schedule_mangle");
679 &movdqa ("xmm4","xmm0"); # save xmm0 for later
680 &movdqa ("xmm5",&QWP($k_mc_forward,$const));
681 &test ($out,$out);
682 &jnz (&label("schedule_mangle_dec"));
683
684 # encrypting
685 &add ($key,16);
686 &pxor ("xmm4",&QWP($k_s63,$const));
687 &pshufb ("xmm4","xmm5");
688 &movdqa ("xmm3","xmm4");
689 &pshufb ("xmm4","xmm5");
690 &pxor ("xmm3","xmm4");
691 &pshufb ("xmm4","xmm5");
692 &pxor ("xmm3","xmm4");
693
694 &jmp (&label("schedule_mangle_both"));
695
696&set_label("schedule_mangle_dec",16);
697 # inverse mix columns
698 &movdqa ("xmm2",&QWP($k_s0F,$const));
699 &lea ($inp,&DWP($k_dksd,$const));
700 &movdqa ("xmm1","xmm2");
701 &pandn ("xmm1","xmm4");
702 &psrld ("xmm1",4); # 1 = hi
703 &pand ("xmm4","xmm2"); # 4 = lo
704
705 &movdqa ("xmm2",&QWP(0,$inp));
706 &pshufb ("xmm2","xmm4");
707 &movdqa ("xmm3",&QWP(0x10,$inp));
708 &pshufb ("xmm3","xmm1");
709 &pxor ("xmm3","xmm2");
710 &pshufb ("xmm3","xmm5");
711
712 &movdqa ("xmm2",&QWP(0x20,$inp));
713 &pshufb ("xmm2","xmm4");
714 &pxor ("xmm2","xmm3");
715 &movdqa ("xmm3",&QWP(0x30,$inp));
716 &pshufb ("xmm3","xmm1");
717 &pxor ("xmm3","xmm2");
718 &pshufb ("xmm3","xmm5");
719
720 &movdqa ("xmm2",&QWP(0x40,$inp));
721 &pshufb ("xmm2","xmm4");
722 &pxor ("xmm2","xmm3");
723 &movdqa ("xmm3",&QWP(0x50,$inp));
724 &pshufb ("xmm3","xmm1");
725 &pxor ("xmm3","xmm2");
726 &pshufb ("xmm3","xmm5");
727
728 &movdqa ("xmm2",&QWP(0x60,$inp));
729 &pshufb ("xmm2","xmm4");
730 &pxor ("xmm2","xmm3");
731 &movdqa ("xmm3",&QWP(0x70,$inp));
732 &pshufb ("xmm3","xmm1");
733 &pxor ("xmm3","xmm2");
734
735 &add ($key,-16);
736
737&set_label("schedule_mangle_both");
738 &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
739 &pshufb ("xmm3","xmm1");
740 &add ($magic,-16);
741 &and ($magic,0x30);
742 &movdqu (&QWP(0,$key),"xmm3");
743 &ret ();
744&function_end_B("_vpaes_schedule_mangle");
745
746#
747# Interface to OpenSSL
748#
749&function_begin("${PREFIX}_set_encrypt_key");
750 &mov ($inp,&wparam(0)); # inp
751 &lea ($base,&DWP(-56,"esp"));
752 &mov ($round,&wparam(1)); # bits
753 &and ($base,-16);
754 &mov ($key,&wparam(2)); # key
755 &xchg ($base,"esp"); # alloca
756 &mov (&DWP(48,"esp"),$base);
757
758 &mov ($base,$round);
759 &shr ($base,5);
760 &add ($base,5);
761 &mov (&DWP(240,$key),$base); # AES_KEY->rounds = nbits/32+5;
762 &mov ($magic,0x30);
763 &mov ($out,0);
764
765 &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
766 &call ("_vpaes_schedule_core");
767&set_label("pic_point");
768
769 &mov ("esp",&DWP(48,"esp"));
770 &xor ("eax","eax");
771&function_end("${PREFIX}_set_encrypt_key");
772
773&function_begin("${PREFIX}_set_decrypt_key");
774 &mov ($inp,&wparam(0)); # inp
775 &lea ($base,&DWP(-56,"esp"));
776 &mov ($round,&wparam(1)); # bits
777 &and ($base,-16);
778 &mov ($key,&wparam(2)); # key
779 &xchg ($base,"esp"); # alloca
780 &mov (&DWP(48,"esp"),$base);
781
782 &mov ($base,$round);
783 &shr ($base,5);
784 &add ($base,5);
785 &mov (&DWP(240,$key),$base); # AES_KEY->rounds = nbits/32+5;
786 &shl ($base,4);
787 &lea ($key,&DWP(16,$key,$base));
788
789 &mov ($out,1);
790 &mov ($magic,$round);
791 &shr ($magic,1);
792 &and ($magic,32);
793 &xor ($magic,32); # nbist==192?0:32;
794
795 &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
796 &call ("_vpaes_schedule_core");
797&set_label("pic_point");
798
799 &mov ("esp",&DWP(48,"esp"));
800 &xor ("eax","eax");
801&function_end("${PREFIX}_set_decrypt_key");
802
803&function_begin("${PREFIX}_encrypt");
804 &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
805 &call ("_vpaes_preheat");
806&set_label("pic_point");
807 &mov ($inp,&wparam(0)); # inp
808 &lea ($base,&DWP(-56,"esp"));
809 &mov ($out,&wparam(1)); # out
810 &and ($base,-16);
811 &mov ($key,&wparam(2)); # key
812 &xchg ($base,"esp"); # alloca
813 &mov (&DWP(48,"esp"),$base);
814
815 &movdqu ("xmm0",&QWP(0,$inp));
816 &call ("_vpaes_encrypt_core");
817 &movdqu (&QWP(0,$out),"xmm0");
818
819 &mov ("esp",&DWP(48,"esp"));
820&function_end("${PREFIX}_encrypt");
821
822&function_begin("${PREFIX}_decrypt");
823 &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
824 &call ("_vpaes_preheat");
825&set_label("pic_point");
826 &mov ($inp,&wparam(0)); # inp
827 &lea ($base,&DWP(-56,"esp"));
828 &mov ($out,&wparam(1)); # out
829 &and ($base,-16);
830 &mov ($key,&wparam(2)); # key
831 &xchg ($base,"esp"); # alloca
832 &mov (&DWP(48,"esp"),$base);
833
834 &movdqu ("xmm0",&QWP(0,$inp));
835 &call ("_vpaes_decrypt_core");
836 &movdqu (&QWP(0,$out),"xmm0");
837
838 &mov ("esp",&DWP(48,"esp"));
839&function_end("${PREFIX}_decrypt");
840
841&function_begin("${PREFIX}_cbc_encrypt");
842 &mov ($inp,&wparam(0)); # inp
843 &mov ($out,&wparam(1)); # out
844 &mov ($round,&wparam(2)); # len
845 &mov ($key,&wparam(3)); # key
846 &sub ($round,16);
847 &jc (&label("cbc_abort"));
848 &lea ($base,&DWP(-56,"esp"));
849 &mov ($const,&wparam(4)); # ivp
850 &and ($base,-16);
851 &mov ($magic,&wparam(5)); # enc
852 &xchg ($base,"esp"); # alloca
853 &movdqu ("xmm1",&QWP(0,$const)); # load IV
854 &sub ($out,$inp);
855 &mov (&DWP(48,"esp"),$base);
856
857 &mov (&DWP(0,"esp"),$out); # save out
858 &mov (&DWP(4,"esp"),$key) # save key
859 &mov (&DWP(8,"esp"),$const); # save ivp
860 &mov ($out,$round); # $out works as $len
861
862 &lea ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
863 &call ("_vpaes_preheat");
864&set_label("pic_point");
865 &cmp ($magic,0);
866 &je (&label("cbc_dec_loop"));
867 &jmp (&label("cbc_enc_loop"));
868
869&set_label("cbc_enc_loop",16);
870 &movdqu ("xmm0",&QWP(0,$inp)); # load input
871 &pxor ("xmm0","xmm1"); # inp^=iv
872 &call ("_vpaes_encrypt_core");
873 &mov ($base,&DWP(0,"esp")); # restore out
874 &mov ($key,&DWP(4,"esp")); # restore key
875 &movdqa ("xmm1","xmm0");
876 &movdqu (&QWP(0,$base,$inp),"xmm0"); # write output
877 &lea ($inp,&DWP(16,$inp));
878 &sub ($out,16);
879 &jnc (&label("cbc_enc_loop"));
880 &jmp (&label("cbc_done"));
881
882&set_label("cbc_dec_loop",16);
883 &movdqu ("xmm0",&QWP(0,$inp)); # load input
884 &movdqa (&QWP(16,"esp"),"xmm1"); # save IV
885 &movdqa (&QWP(32,"esp"),"xmm0"); # save future IV
886 &call ("_vpaes_decrypt_core");
887 &mov ($base,&DWP(0,"esp")); # restore out
888 &mov ($key,&DWP(4,"esp")); # restore key
889 &pxor ("xmm0",&QWP(16,"esp")); # out^=iv
890 &movdqa ("xmm1",&QWP(32,"esp")); # load next IV
891 &movdqu (&QWP(0,$base,$inp),"xmm0"); # write output
892 &lea ($inp,&DWP(16,$inp));
893 &sub ($out,16);
894 &jnc (&label("cbc_dec_loop"));
895
896&set_label("cbc_done");
897 &mov ($base,&DWP(8,"esp")); # restore ivp
898 &mov ("esp",&DWP(48,"esp"));
899 &movdqu (&QWP(0,$base),"xmm1"); # write IV
900&set_label("cbc_abort");
901&function_end("${PREFIX}_cbc_encrypt");
902
903&asm_finish();
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-04 04:02:15 +0000