crypto/aes/asm/vpaes-x86.pl

   1 #! /usr/bin/env perl
   2 # Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   4 # Licensed under the Apache License 2.0 (the "License").  You may not use
   5 # this file except in compliance with the License.  You can obtain a copy
   6 # in the file LICENSE in the source distribution or at
   7 # https://www.openssl.org/source/license.html
   8
   9
  10 ######################################################################
  11 ## Constant-time SSSE3 AES core implementation.
  12 ## version 0.1
  13 ##
  14 ## By Mike Hamburg (Stanford University), 2009
  15 ## Public domain.
  16 ##
  17 ## For details see http://shiftleft.org/papers/vector_aes/ and
  18 ## http://crypto.stanford.edu/vpaes/.
  19
  20 ######################################################################
  21 # September 2011.
  22 #
  23 # Port vpaes-x86_64.pl as 32-bit "almost" drop-in replacement for
  24 # aes-586.pl. "Almost" refers to the fact that AES_cbc_encrypt
  25 # doesn't handle partial vectors (doesn't have to if called from
  26 # EVP only). "Drop-in" implies that this module doesn't share key
  27 # schedule structure with the original nor does it make assumption
  28 # about its alignment...
  29 #
  30 # Performance summary. aes-586.pl column lists large-block CBC
  31 # encrypt/decrypt/with-hyper-threading-off(*) results in cycles per
  32 # byte processed with 128-bit key, and vpaes-x86.pl column - [also
  33 # large-block CBC] encrypt/decrypt.
  34 #
  35 #               aes-586.pl              vpaes-x86.pl
  36 #
  37 # Core 2(**)    28.1/41.4/18.3          21.9/25.2(***)
  38 # Nehalem       27.9/40.4/18.1          10.2/11.9
  39 # Atom          70.7/92.1/60.1          61.1/75.4(***)
  40 # Silvermont    45.4/62.9/24.1          49.2/61.1(***)
  41 #
  42 # (*)   "Hyper-threading" in the context refers rather to cache shared
  43 #       among multiple cores, than to specifically Intel HTT. As vast
  44 #       majority of contemporary cores share cache, slower code path
  45 #       is common place. In other words "with-hyper-threading-off"
  46 #       results are presented mostly for reference purposes.
  47 #
  48 # (**)  "Core 2" refers to initial 65nm design, a.k.a. Conroe.
  49 #
  50 # (***) Less impressive improvement on Core 2 and Atom is due to slow
  51 #       pshufb, yet it's respectable +28%/64%  improvement on Core 2
  52 #       and +15% on Atom (as implied, over "hyper-threading-safe"
  53 #       code path).
  54 #
  55 #                                               <appro@openssl.org>
  56
  57 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  58 push(@INC,"${dir}","${dir}../../perlasm");
  59 require "x86asm.pl";
  60
  61 $output = pop and open STDOUT,">$output";
  62
  63 &asm_init($ARGV[0],$x86only = $ARGV[$#ARGV] eq "386");
  64
  65 $PREFIX="vpaes";
  66
  67 my  ($round, $base, $magic, $key, $const, $inp, $out)=
  68     ("eax",  "ebx", "ecx",  "edx","ebp",  "esi","edi");
  69
  70 &static_label("_vpaes_consts");
  71 &static_label("_vpaes_schedule_low_round");
  72
  73 &set_label("_vpaes_consts",64);
  74 $k_inv=-0x30;           # inv, inva
  75         &data_word(0x0D080180,0x0E05060F,0x0A0B0C02,0x04070309);
  76         &data_word(0x0F0B0780,0x01040A06,0x02050809,0x030D0E0C);
  77
  78 $k_s0F=-0x10;           # s0F
  79         &data_word(0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F);
  80
  81 $k_ipt=0x00;            # input transform (lo, hi)
  82         &data_word(0x5A2A7000,0xC2B2E898,0x52227808,0xCABAE090);
  83         &data_word(0x317C4D00,0x4C01307D,0xB0FDCC81,0xCD80B1FC);
  84
  85 $k_sb1=0x20;            # sb1u, sb1t
  86         &data_word(0xCB503E00,0xB19BE18F,0x142AF544,0xA5DF7A6E);
  87         &data_word(0xFAE22300,0x3618D415,0x0D2ED9EF,0x3BF7CCC1);
  88 $k_sb2=0x40;            # sb2u, sb2t
  89         &data_word(0x0B712400,0xE27A93C6,0xBC982FCD,0x5EB7E955);
  90         &data_word(0x0AE12900,0x69EB8840,0xAB82234A,0xC2A163C8);
  91 $k_sbo=0x60;            # sbou, sbot
  92         &data_word(0x6FBDC700,0xD0D26D17,0xC502A878,0x15AABF7A);
  93         &data_word(0x5FBB6A00,0xCFE474A5,0x412B35FA,0x8E1E90D1);
  94
  95 $k_mc_forward=0x80;     # mc_forward
  96         &data_word(0x00030201,0x04070605,0x080B0A09,0x0C0F0E0D);
  97         &data_word(0x04070605,0x080B0A09,0x0C0F0E0D,0x00030201);
  98         &data_word(0x080B0A09,0x0C0F0E0D,0x00030201,0x04070605);
  99         &data_word(0x0C0F0E0D,0x00030201,0x04070605,0x080B0A09);
 100
 101 $k_mc_backward=0xc0;    # mc_backward
 102         &data_word(0x02010003,0x06050407,0x0A09080B,0x0E0D0C0F);
 103         &data_word(0x0E0D0C0F,0x02010003,0x06050407,0x0A09080B);
 104         &data_word(0x0A09080B,0x0E0D0C0F,0x02010003,0x06050407);
 105         &data_word(0x06050407,0x0A09080B,0x0E0D0C0F,0x02010003);
 106
 107 $k_sr=0x100;            # sr
 108         &data_word(0x03020100,0x07060504,0x0B0A0908,0x0F0E0D0C);
 109         &data_word(0x0F0A0500,0x030E0904,0x07020D08,0x0B06010C);
 110         &data_word(0x0B020900,0x0F060D04,0x030A0108,0x070E050C);
 111         &data_word(0x070A0D00,0x0B0E0104,0x0F020508,0x0306090C);
 112
 113 $k_rcon=0x140;          # rcon
 114         &data_word(0xAF9DEEB6,0x1F8391B9,0x4D7C7D81,0x702A9808);
 115
 116 $k_s63=0x150;           # s63: all equal to 0x63 transformed
 117         &data_word(0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B);
 118
 119 $k_opt=0x160;           # output transform
 120         &data_word(0xD6B66000,0xFF9F4929,0xDEBE6808,0xF7974121);
 121         &data_word(0x50BCEC00,0x01EDBD51,0xB05C0CE0,0xE10D5DB1);
 122
 123 $k_deskew=0x180;        # deskew tables: inverts the sbox's "skew"
 124         &data_word(0x47A4E300,0x07E4A340,0x5DBEF91A,0x1DFEB95A);
 125         &data_word(0x83EA6900,0x5F36B5DC,0xF49D1E77,0x2841C2AB);
 126 ##
 127 ##  Decryption stuff
 128 ##  Key schedule constants
 129 ##
 130 $k_dksd=0x1a0;          # decryption key schedule: invskew x*D
 131         &data_word(0xA3E44700,0xFEB91A5D,0x5A1DBEF9,0x0740E3A4);
 132         &data_word(0xB5368300,0x41C277F4,0xAB289D1E,0x5FDC69EA);
 133 $k_dksb=0x1c0;          # decryption key schedule: invskew x*B
 134         &data_word(0x8550D500,0x9A4FCA1F,0x1CC94C99,0x03D65386);
 135         &data_word(0xB6FC4A00,0x115BEDA7,0x7E3482C8,0xD993256F);
 136 $k_dkse=0x1e0;          # decryption key schedule: invskew x*E + 0x63
 137         &data_word(0x1FC9D600,0xD5031CCA,0x994F5086,0x53859A4C);
 138         &data_word(0x4FDC7BE8,0xA2319605,0x20B31487,0xCD5EF96A);
 139 $k_dks9=0x200;          # decryption key schedule: invskew x*9
 140         &data_word(0x7ED9A700,0xB6116FC8,0x82255BFC,0x4AED9334);
 141         &data_word(0x27143300,0x45765162,0xE9DAFDCE,0x8BB89FAC);
 142
 143 ##
 144 ##  Decryption stuff
 145 ##  Round function constants
 146 ##
 147 $k_dipt=0x220;          # decryption input transform
 148         &data_word(0x0B545F00,0x0F505B04,0x114E451A,0x154A411E);
 149         &data_word(0x60056500,0x86E383E6,0xF491F194,0x12771772);
 150
 151 $k_dsb9=0x240;          # decryption sbox output *9*u, *9*t
 152         &data_word(0x9A86D600,0x851C0353,0x4F994CC9,0xCAD51F50);
 153         &data_word(0xECD74900,0xC03B1789,0xB2FBA565,0x725E2C9E);
 154 $k_dsbd=0x260;          # decryption sbox output *D*u, *D*t
 155         &data_word(0xE6B1A200,0x7D57CCDF,0x882A4439,0xF56E9B13);
 156         &data_word(0x24C6CB00,0x3CE2FAF7,0x15DEEFD3,0x2931180D);
 157 $k_dsbb=0x280;          # decryption sbox output *B*u, *B*t
 158         &data_word(0x96B44200,0xD0226492,0xB0F2D404,0x602646F6);
 159         &data_word(0xCD596700,0xC19498A6,0x3255AA6B,0xF3FF0C3E);
 160 $k_dsbe=0x2a0;          # decryption sbox output *E*u, *E*t
 161         &data_word(0x26D4D000,0x46F29296,0x64B4F6B0,0x22426004);
 162         &data_word(0xFFAAC100,0x0C55A6CD,0x98593E32,0x9467F36B);
 163 $k_dsbo=0x2c0;          # decryption sbox final output
 164         &data_word(0x7EF94000,0x1387EA53,0xD4943E2D,0xC7AA6DB9);
 165         &data_word(0x93441D00,0x12D7560F,0xD8C58E9C,0xCA4B8159);
 166 &asciz  ("Vector Permutation AES for x86/SSSE3, Mike Hamburg (Stanford University)");
 167 &align  (64);
 168
 169 &function_begin_B("_vpaes_preheat");
 170         &add    ($const,&DWP(0,"esp"));
 171         &movdqa ("xmm7",&QWP($k_inv,$const));
 172         &movdqa ("xmm6",&QWP($k_s0F,$const));
 173         &ret    ();
 174 &function_end_B("_vpaes_preheat");
 175
 176 ##
 177 ##  _aes_encrypt_core
 178 ##
 179 ##  AES-encrypt %xmm0.
 180 ##
 181 ##  Inputs:
 182 ##     %xmm0 = input
 183 ##     %xmm6-%xmm7 as in _vpaes_preheat
 184 ##    (%edx) = scheduled keys
 185 ##
 186 ##  Output in %xmm0
 187 ##  Clobbers  %xmm1-%xmm5, %eax, %ebx, %ecx, %edx
 188 ##
 189 ##
 190 &function_begin_B("_vpaes_encrypt_core");
 191         &mov    ($magic,16);
 192         &mov    ($round,&DWP(240,$key));
 193         &movdqa ("xmm1","xmm6")
 194         &movdqa ("xmm2",&QWP($k_ipt,$const));
 195         &pandn  ("xmm1","xmm0");
 196         &pand   ("xmm0","xmm6");
 197         &movdqu ("xmm5",&QWP(0,$key));
 198         &pshufb ("xmm2","xmm0");
 199         &movdqa ("xmm0",&QWP($k_ipt+16,$const));
 200         &pxor   ("xmm2","xmm5");
 201         &psrld  ("xmm1",4);
 202         &add    ($key,16);
 203         &pshufb ("xmm0","xmm1");
 204         &lea    ($base,&DWP($k_mc_backward,$const));
 205         &pxor   ("xmm0","xmm2");
 206         &jmp    (&label("enc_entry"));
 207
 208
 209 &set_label("enc_loop",16);
 210         # middle of middle round
 211         &movdqa ("xmm4",&QWP($k_sb1,$const));   # 4 : sb1u
 212         &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sb1t
 213         &pshufb ("xmm4","xmm2");                # 4 = sb1u
 214         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 215         &pxor   ("xmm4","xmm5");                # 4 = sb1u + k
 216         &movdqa ("xmm5",&QWP($k_sb2,$const));   # 4 : sb2u
 217         &pxor   ("xmm0","xmm4");                # 0 = A
 218         &movdqa ("xmm1",&QWP(-0x40,$base,$magic));# .Lk_mc_forward[]
 219         &pshufb ("xmm5","xmm2");                # 4 = sb2u
 220         &movdqa ("xmm2",&QWP($k_sb2+16,$const));# 2 : sb2t
 221         &movdqa ("xmm4",&QWP(0,$base,$magic));  # .Lk_mc_backward[]
 222         &pshufb ("xmm2","xmm3");                # 2 = sb2t
 223         &movdqa ("xmm3","xmm0");                # 3 = A
 224         &pxor   ("xmm2","xmm5");                # 2 = 2A
 225         &pshufb ("xmm0","xmm1");                # 0 = B
 226         &add    ($key,16);                      # next key
 227         &pxor   ("xmm0","xmm2");                # 0 = 2A+B
 228         &pshufb ("xmm3","xmm4");                # 3 = D
 229         &add    ($magic,16);                    # next mc
 230         &pxor   ("xmm3","xmm0");                # 3 = 2A+B+D
 231         &pshufb ("xmm0","xmm1");                # 0 = 2B+C
 232         &and    ($magic,0x30);                  # ... mod 4
 233         &sub    ($round,1);                     # nr--
 234         &pxor   ("xmm0","xmm3");                # 0 = 2A+3B+C+D
 235
 236 &set_label("enc_entry");
 237         # top of round
 238         &movdqa ("xmm1","xmm6");                # 1 : i
 239         &movdqa ("xmm5",&QWP($k_inv+16,$const));# 2 : a/k
 240         &pandn  ("xmm1","xmm0");                # 1 = i<<4
 241         &psrld  ("xmm1",4);                     # 1 = i
 242         &pand   ("xmm0","xmm6");                # 0 = k
 243         &pshufb ("xmm5","xmm0");                # 2 = a/k
 244         &movdqa ("xmm3","xmm7");                # 3 : 1/i
 245         &pxor   ("xmm0","xmm1");                # 0 = j
 246         &pshufb ("xmm3","xmm1");                # 3 = 1/i
 247         &movdqa ("xmm4","xmm7");                # 4 : 1/j
 248         &pxor   ("xmm3","xmm5");                # 3 = iak = 1/i + a/k
 249         &pshufb ("xmm4","xmm0");                # 4 = 1/j
 250         &movdqa ("xmm2","xmm7");                # 2 : 1/iak
 251         &pxor   ("xmm4","xmm5");                # 4 = jak = 1/j + a/k
 252         &pshufb ("xmm2","xmm3");                # 2 = 1/iak
 253         &movdqa ("xmm3","xmm7");                # 3 : 1/jak
 254         &pxor   ("xmm2","xmm0");                # 2 = io
 255         &pshufb ("xmm3","xmm4");                # 3 = 1/jak
 256         &movdqu ("xmm5",&QWP(0,$key));
 257         &pxor   ("xmm3","xmm1");                # 3 = jo
 258         &jnz    (&label("enc_loop"));
 259
 260         # middle of last round
 261         &movdqa ("xmm4",&QWP($k_sbo,$const));   # 3 : sbou      .Lk_sbo
 262         &movdqa ("xmm0",&QWP($k_sbo+16,$const));# 3 : sbot      .Lk_sbo+16
 263         &pshufb ("xmm4","xmm2");                # 4 = sbou
 264         &pxor   ("xmm4","xmm5");                # 4 = sb1u + k
 265         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 266         &movdqa ("xmm1",&QWP(0x40,$base,$magic));# .Lk_sr[]
 267         &pxor   ("xmm0","xmm4");                # 0 = A
 268         &pshufb ("xmm0","xmm1");
 269         &ret    ();
 270 &function_end_B("_vpaes_encrypt_core");
 271
 272 ##
 273 ##  Decryption core
 274 ##
 275 ##  Same API as encryption core.
 276 ##
 277 &function_begin_B("_vpaes_decrypt_core");
 278         &lea    ($base,&DWP($k_dsbd,$const));
 279         &mov    ($round,&DWP(240,$key));
 280         &movdqa ("xmm1","xmm6");
 281         &movdqa ("xmm2",&QWP($k_dipt-$k_dsbd,$base));
 282         &pandn  ("xmm1","xmm0");
 283         &mov    ($magic,$round);
 284         &psrld  ("xmm1",4)
 285         &movdqu ("xmm5",&QWP(0,$key));
 286         &shl    ($magic,4);
 287         &pand   ("xmm0","xmm6");
 288         &pshufb ("xmm2","xmm0");
 289         &movdqa ("xmm0",&QWP($k_dipt-$k_dsbd+16,$base));
 290         &xor    ($magic,0x30);
 291         &pshufb ("xmm0","xmm1");
 292         &and    ($magic,0x30);
 293         &pxor   ("xmm2","xmm5");
 294         &movdqa ("xmm5",&QWP($k_mc_forward+48,$const));
 295         &pxor   ("xmm0","xmm2");
 296         &add    ($key,16);
 297         &lea    ($magic,&DWP($k_sr-$k_dsbd,$base,$magic));
 298         &jmp    (&label("dec_entry"));
 299
 300 &set_label("dec_loop",16);
 301 ##
 302 ##  Inverse mix columns
 303 ##
 304         &movdqa ("xmm4",&QWP(-0x20,$base));     # 4 : sb9u
 305         &movdqa ("xmm1",&QWP(-0x10,$base));     # 0 : sb9t
 306         &pshufb ("xmm4","xmm2");                # 4 = sb9u
 307         &pshufb ("xmm1","xmm3");                # 0 = sb9t
 308         &pxor   ("xmm0","xmm4");
 309         &movdqa ("xmm4",&QWP(0,$base));         # 4 : sbdu
 310         &pxor   ("xmm0","xmm1");                # 0 = ch
 311         &movdqa ("xmm1",&QWP(0x10,$base));      # 0 : sbdt
 312
 313         &pshufb ("xmm4","xmm2");                # 4 = sbdu
 314         &pshufb ("xmm0","xmm5");                # MC ch
 315         &pshufb ("xmm1","xmm3");                # 0 = sbdt
 316         &pxor   ("xmm0","xmm4");                # 4 = ch
 317         &movdqa ("xmm4",&QWP(0x20,$base));      # 4 : sbbu
 318         &pxor   ("xmm0","xmm1");                # 0 = ch
 319         &movdqa ("xmm1",&QWP(0x30,$base));      # 0 : sbbt
 320
 321         &pshufb ("xmm4","xmm2");                # 4 = sbbu
 322         &pshufb ("xmm0","xmm5");                # MC ch
 323         &pshufb ("xmm1","xmm3");                # 0 = sbbt
 324         &pxor   ("xmm0","xmm4");                # 4 = ch
 325         &movdqa ("xmm4",&QWP(0x40,$base));      # 4 : sbeu
 326         &pxor   ("xmm0","xmm1");                # 0 = ch
 327         &movdqa ("xmm1",&QWP(0x50,$base));      # 0 : sbet
 328
 329         &pshufb ("xmm4","xmm2");                # 4 = sbeu
 330         &pshufb ("xmm0","xmm5");                # MC ch
 331         &pshufb ("xmm1","xmm3");                # 0 = sbet
 332         &pxor   ("xmm0","xmm4");                # 4 = ch
 333         &add    ($key,16);                      # next round key
 334         &palignr("xmm5","xmm5",12);
 335         &pxor   ("xmm0","xmm1");                # 0 = ch
 336         &sub    ($round,1);                     # nr--
 337
 338 &set_label("dec_entry");
 339         # top of round
 340         &movdqa ("xmm1","xmm6");                # 1 : i
 341         &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k
 342         &pandn  ("xmm1","xmm0");                # 1 = i<<4
 343         &pand   ("xmm0","xmm6");                # 0 = k
 344         &psrld  ("xmm1",4);                     # 1 = i
 345         &pshufb ("xmm2","xmm0");                # 2 = a/k
 346         &movdqa ("xmm3","xmm7");                # 3 : 1/i
 347         &pxor   ("xmm0","xmm1");                # 0 = j
 348         &pshufb ("xmm3","xmm1");                # 3 = 1/i
 349         &movdqa ("xmm4","xmm7");                # 4 : 1/j
 350         &pxor   ("xmm3","xmm2");                # 3 = iak = 1/i + a/k
 351         &pshufb ("xmm4","xmm0");                # 4 = 1/j
 352         &pxor   ("xmm4","xmm2");                # 4 = jak = 1/j + a/k
 353         &movdqa ("xmm2","xmm7");                # 2 : 1/iak
 354         &pshufb ("xmm2","xmm3");                # 2 = 1/iak
 355         &movdqa ("xmm3","xmm7");                # 3 : 1/jak
 356         &pxor   ("xmm2","xmm0");                # 2 = io
 357         &pshufb ("xmm3","xmm4");                # 3 = 1/jak
 358         &movdqu ("xmm0",&QWP(0,$key));
 359         &pxor   ("xmm3","xmm1");                # 3 = jo
 360         &jnz    (&label("dec_loop"));
 361
 362         # middle of last round
 363         &movdqa ("xmm4",&QWP(0x60,$base));      # 3 : sbou
 364         &pshufb ("xmm4","xmm2");                # 4 = sbou
 365         &pxor   ("xmm4","xmm0");                # 4 = sb1u + k
 366         &movdqa ("xmm0",&QWP(0x70,$base));      # 0 : sbot
 367         &movdqa ("xmm2",&QWP(0,$magic));
 368         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 369         &pxor   ("xmm0","xmm4");                # 0 = A
 370         &pshufb ("xmm0","xmm2");
 371         &ret    ();
 372 &function_end_B("_vpaes_decrypt_core");
 373
 374 ########################################################
 375 ##                                                    ##
 376 ##                  AES key schedule                  ##
 377 ##                                                    ##
 378 ########################################################
 379 &function_begin_B("_vpaes_schedule_core");
 380         &add    ($const,&DWP(0,"esp"));
 381         &movdqu ("xmm0",&QWP(0,$inp));          # load key (unaligned)
 382         &movdqa ("xmm2",&QWP($k_rcon,$const));  # load rcon
 383
 384         # input transform
 385         &movdqa ("xmm3","xmm0");
 386         &lea    ($base,&DWP($k_ipt,$const));
 387         &movdqa (&QWP(4,"esp"),"xmm2");         # xmm8
 388         &call   ("_vpaes_schedule_transform");
 389         &movdqa ("xmm7","xmm0");
 390
 391         &test   ($out,$out);
 392         &jnz    (&label("schedule_am_decrypting"));
 393
 394         # encrypting, output zeroth round key after transform
 395         &movdqu (&QWP(0,$key),"xmm0");
 396         &jmp    (&label("schedule_go"));
 397
 398 &set_label("schedule_am_decrypting");
 399         # decrypting, output zeroth round key after shiftrows
 400         &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
 401         &pshufb ("xmm3","xmm1");
 402         &movdqu (&QWP(0,$key),"xmm3");
 403         &xor    ($magic,0x30);
 404
 405 &set_label("schedule_go");
 406         &cmp    ($round,192);
 407         &ja     (&label("schedule_256"));
 408         &je     (&label("schedule_192"));
 409         # 128: fall though
 410
 411 ##
 412 ##  .schedule_128
 413 ##
 414 ##  128-bit specific part of key schedule.
 415 ##
 416 ##  This schedule is really simple, because all its parts
 417 ##  are accomplished by the subroutines.
 418 ##
 419 &set_label("schedule_128");
 420         &mov    ($round,10);
 421
 422 &set_label("loop_schedule_128");
 423         &call   ("_vpaes_schedule_round");
 424         &dec    ($round);
 425         &jz     (&label("schedule_mangle_last"));
 426         &call   ("_vpaes_schedule_mangle");     # write output
 427         &jmp    (&label("loop_schedule_128"));
 428
 429 ##
 430 ##  .aes_schedule_192
 431 ##
 432 ##  192-bit specific part of key schedule.
 433 ##
 434 ##  The main body of this schedule is the same as the 128-bit
 435 ##  schedule, but with more smearing.  The long, high side is
 436 ##  stored in %xmm7 as before, and the short, low side is in
 437 ##  the high bits of %xmm6.
 438 ##
 439 ##  This schedule is somewhat nastier, however, because each
 440 ##  round produces 192 bits of key material, or 1.5 round keys.
 441 ##  Therefore, on each cycle we do 2 rounds and produce 3 round
 442 ##  keys.
 443 ##
 444 &set_label("schedule_192",16);
 445         &movdqu ("xmm0",&QWP(8,$inp));          # load key part 2 (very unaligned)
 446         &call   ("_vpaes_schedule_transform");  # input transform
 447         &movdqa ("xmm6","xmm0");                # save short part
 448         &pxor   ("xmm4","xmm4");                # clear 4
 449         &movhlps("xmm6","xmm4");                # clobber low side with zeros
 450         &mov    ($round,4);
 451
 452 &set_label("loop_schedule_192");
 453         &call   ("_vpaes_schedule_round");
 454         &palignr("xmm0","xmm6",8);
 455         &call   ("_vpaes_schedule_mangle");     # save key n
 456         &call   ("_vpaes_schedule_192_smear");
 457         &call   ("_vpaes_schedule_mangle");     # save key n+1
 458         &call   ("_vpaes_schedule_round");
 459         &dec    ($round);
 460         &jz     (&label("schedule_mangle_last"));
 461         &call   ("_vpaes_schedule_mangle");     # save key n+2
 462         &call   ("_vpaes_schedule_192_smear");
 463         &jmp    (&label("loop_schedule_192"));
 464
 465 ##
 466 ##  .aes_schedule_256
 467 ##
 468 ##  256-bit specific part of key schedule.
 469 ##
 470 ##  The structure here is very similar to the 128-bit
 471 ##  schedule, but with an additional "low side" in
 472 ##  %xmm6.  The low side's rounds are the same as the
 473 ##  high side's, except no rcon and no rotation.
 474 ##
 475 &set_label("schedule_256",16);
 476         &movdqu ("xmm0",&QWP(16,$inp));         # load key part 2 (unaligned)
 477         &call   ("_vpaes_schedule_transform");  # input transform
 478         &mov    ($round,7);
 479
 480 &set_label("loop_schedule_256");
 481         &call   ("_vpaes_schedule_mangle");     # output low result
 482         &movdqa ("xmm6","xmm0");                # save cur_lo in xmm6
 483
 484         # high round
 485         &call   ("_vpaes_schedule_round");
 486         &dec    ($round);
 487         &jz     (&label("schedule_mangle_last"));
 488         &call   ("_vpaes_schedule_mangle");
 489
 490         # low round. swap xmm7 and xmm6
 491         &pshufd ("xmm0","xmm0",0xFF);
 492         &movdqa (&QWP(20,"esp"),"xmm7");
 493         &movdqa ("xmm7","xmm6");
 494         &call   ("_vpaes_schedule_low_round");
 495         &movdqa ("xmm7",&QWP(20,"esp"));
 496
 497         &jmp    (&label("loop_schedule_256"));
 498
 499 ##
 500 ##  .aes_schedule_mangle_last
 501 ##
 502 ##  Mangler for last round of key schedule
 503 ##  Mangles %xmm0
 504 ##    when encrypting, outputs out(%xmm0) ^ 63
 505 ##    when decrypting, outputs unskew(%xmm0)
 506 ##
 507 ##  Always called right before return... jumps to cleanup and exits
 508 ##
 509 &set_label("schedule_mangle_last",16);
 510         # schedule last round key from xmm0
 511         &lea    ($base,&DWP($k_deskew,$const));
 512         &test   ($out,$out);
 513         &jnz    (&label("schedule_mangle_last_dec"));
 514
 515         # encrypting
 516         &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
 517         &pshufb ("xmm0","xmm1");                # output permute
 518         &lea    ($base,&DWP($k_opt,$const));    # prepare to output transform
 519         &add    ($key,32);
 520
 521 &set_label("schedule_mangle_last_dec");
 522         &add    ($key,-16);
 523         &pxor   ("xmm0",&QWP($k_s63,$const));
 524         &call   ("_vpaes_schedule_transform");  # output transform
 525         &movdqu (&QWP(0,$key),"xmm0");          # save last key
 526
 527         # cleanup
 528         &pxor   ("xmm0","xmm0");
 529         &pxor   ("xmm1","xmm1");
 530         &pxor   ("xmm2","xmm2");
 531         &pxor   ("xmm3","xmm3");
 532         &pxor   ("xmm4","xmm4");
 533         &pxor   ("xmm5","xmm5");
 534         &pxor   ("xmm6","xmm6");
 535         &pxor   ("xmm7","xmm7");
 536         &ret    ();
 537 &function_end_B("_vpaes_schedule_core");
 538
 539 ##
 540 ##  .aes_schedule_192_smear
 541 ##
 542 ##  Smear the short, low side in the 192-bit key schedule.
 543 ##
 544 ##  Inputs:
 545 ##    %xmm7: high side, b  a  x  y
 546 ##    %xmm6:  low side, d  c  0  0
 547 ##    %xmm13: 0
 548 ##
 549 ##  Outputs:
 550 ##    %xmm6: b+c+d  b+c  0  0
 551 ##    %xmm0: b+c+d  b+c  b  a
 552 ##
 553 &function_begin_B("_vpaes_schedule_192_smear");
 554         &pshufd ("xmm1","xmm6",0x80);           # d c 0 0 -> c 0 0 0
 555         &pshufd ("xmm0","xmm7",0xFE);           # b a _ _ -> b b b a
 556         &pxor   ("xmm6","xmm1");                # -> c+d c 0 0
 557         &pxor   ("xmm1","xmm1");
 558         &pxor   ("xmm6","xmm0");                # -> b+c+d b+c b a
 559         &movdqa ("xmm0","xmm6");
 560         &movhlps("xmm6","xmm1");                # clobber low side with zeros
 561         &ret    ();
 562 &function_end_B("_vpaes_schedule_192_smear");
 563
 564 ##
 565 ##  .aes_schedule_round
 566 ##
 567 ##  Runs one main round of the key schedule on %xmm0, %xmm7
 568 ##
 569 ##  Specifically, runs subbytes on the high dword of %xmm0
 570 ##  then rotates it by one byte and xors into the low dword of
 571 ##  %xmm7.
 572 ##
 573 ##  Adds rcon from low byte of %xmm8, then rotates %xmm8 for
 574 ##  next rcon.
 575 ##
 576 ##  Smears the dwords of %xmm7 by xoring the low into the
 577 ##  second low, result into third, result into highest.
 578 ##
 579 ##  Returns results in %xmm7 = %xmm0.
 580 ##  Clobbers %xmm1-%xmm5.
 581 ##
 582 &function_begin_B("_vpaes_schedule_round");
 583         # extract rcon from xmm8
 584         &movdqa ("xmm2",&QWP(8,"esp"));         # xmm8
 585         &pxor   ("xmm1","xmm1");
 586         &palignr("xmm1","xmm2",15);
 587         &palignr("xmm2","xmm2",15);
 588         &pxor   ("xmm7","xmm1");
 589
 590         # rotate
 591         &pshufd ("xmm0","xmm0",0xFF);
 592         &palignr("xmm0","xmm0",1);
 593
 594         # fall through...
 595         &movdqa (&QWP(8,"esp"),"xmm2");         # xmm8
 596
 597         # low round: same as high round, but no rotation and no rcon.
 598 &set_label("_vpaes_schedule_low_round");
 599         # smear xmm7
 600         &movdqa ("xmm1","xmm7");
 601         &pslldq ("xmm7",4);
 602         &pxor   ("xmm7","xmm1");
 603         &movdqa ("xmm1","xmm7");
 604         &pslldq ("xmm7",8);
 605         &pxor   ("xmm7","xmm1");
 606         &pxor   ("xmm7",&QWP($k_s63,$const));
 607
 608         # subbyte
 609         &movdqa ("xmm4",&QWP($k_s0F,$const));
 610         &movdqa ("xmm5",&QWP($k_inv,$const));   # 4 : 1/j
 611         &movdqa ("xmm1","xmm4");
 612         &pandn  ("xmm1","xmm0");
 613         &psrld  ("xmm1",4);                     # 1 = i
 614         &pand   ("xmm0","xmm4");                # 0 = k
 615         &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k
 616         &pshufb ("xmm2","xmm0");                # 2 = a/k
 617         &pxor   ("xmm0","xmm1");                # 0 = j
 618         &movdqa ("xmm3","xmm5");                # 3 : 1/i
 619         &pshufb ("xmm3","xmm1");                # 3 = 1/i
 620         &pxor   ("xmm3","xmm2");                # 3 = iak = 1/i + a/k
 621         &movdqa ("xmm4","xmm5");                # 4 : 1/j
 622         &pshufb ("xmm4","xmm0");                # 4 = 1/j
 623         &pxor   ("xmm4","xmm2");                # 4 = jak = 1/j + a/k
 624         &movdqa ("xmm2","xmm5");                # 2 : 1/iak
 625         &pshufb ("xmm2","xmm3");                # 2 = 1/iak
 626         &pxor   ("xmm2","xmm0");                # 2 = io
 627         &movdqa ("xmm3","xmm5");                # 3 : 1/jak
 628         &pshufb ("xmm3","xmm4");                # 3 = 1/jak
 629         &pxor   ("xmm3","xmm1");                # 3 = jo
 630         &movdqa ("xmm4",&QWP($k_sb1,$const));   # 4 : sbou
 631         &pshufb ("xmm4","xmm2");                # 4 = sbou
 632         &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sbot
 633         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 634         &pxor   ("xmm0","xmm4");                # 0 = sbox output
 635
 636         # add in smeared stuff
 637         &pxor   ("xmm0","xmm7");
 638         &movdqa ("xmm7","xmm0");
 639         &ret    ();
 640 &function_end_B("_vpaes_schedule_round");
 641
 642 ##
 643 ##  .aes_schedule_transform
 644 ##
 645 ##  Linear-transform %xmm0 according to tables at (%ebx)
 646 ##
 647 ##  Output in %xmm0
 648 ##  Clobbers %xmm1, %xmm2
 649 ##
 650 &function_begin_B("_vpaes_schedule_transform");
 651         &movdqa ("xmm2",&QWP($k_s0F,$const));
 652         &movdqa ("xmm1","xmm2");
 653         &pandn  ("xmm1","xmm0");
 654         &psrld  ("xmm1",4);
 655         &pand   ("xmm0","xmm2");
 656         &movdqa ("xmm2",&QWP(0,$base));
 657         &pshufb ("xmm2","xmm0");
 658         &movdqa ("xmm0",&QWP(16,$base));
 659         &pshufb ("xmm0","xmm1");
 660         &pxor   ("xmm0","xmm2");
 661         &ret    ();
 662 &function_end_B("_vpaes_schedule_transform");
 663
 664 ##
 665 ##  .aes_schedule_mangle
 666 ##
 667 ##  Mangle xmm0 from (basis-transformed) standard version
 668 ##  to our version.
 669 ##
 670 ##  On encrypt,
 671 ##    xor with 0x63
 672 ##    multiply by circulant 0,1,1,1
 673 ##    apply shiftrows transform
 674 ##
 675 ##  On decrypt,
 676 ##    xor with 0x63
 677 ##    multiply by "inverse mixcolumns" circulant E,B,D,9
 678 ##    deskew
 679 ##    apply shiftrows transform
 680 ##
 681 ##
 682 ##  Writes out to (%edx), and increments or decrements it
 683 ##  Keeps track of round number mod 4 in %ecx
 684 ##  Preserves xmm0
 685 ##  Clobbers xmm1-xmm5
 686 ##
 687 &function_begin_B("_vpaes_schedule_mangle");
 688         &movdqa ("xmm4","xmm0");        # save xmm0 for later
 689         &movdqa ("xmm5",&QWP($k_mc_forward,$const));
 690         &test   ($out,$out);
 691         &jnz    (&label("schedule_mangle_dec"));
 692
 693         # encrypting
 694         &add    ($key,16);
 695         &pxor   ("xmm4",&QWP($k_s63,$const));
 696         &pshufb ("xmm4","xmm5");
 697         &movdqa ("xmm3","xmm4");
 698         &pshufb ("xmm4","xmm5");
 699         &pxor   ("xmm3","xmm4");
 700         &pshufb ("xmm4","xmm5");
 701         &pxor   ("xmm3","xmm4");
 702
 703         &jmp    (&label("schedule_mangle_both"));
 704
 705 &set_label("schedule_mangle_dec",16);
 706         # inverse mix columns
 707         &movdqa ("xmm2",&QWP($k_s0F,$const));
 708         &lea    ($inp,&DWP($k_dksd,$const));
 709         &movdqa ("xmm1","xmm2");
 710         &pandn  ("xmm1","xmm4");
 711         &psrld  ("xmm1",4);                     # 1 = hi
 712         &pand   ("xmm4","xmm2");                # 4 = lo
 713
 714         &movdqa ("xmm2",&QWP(0,$inp));
 715         &pshufb ("xmm2","xmm4");
 716         &movdqa ("xmm3",&QWP(0x10,$inp));
 717         &pshufb ("xmm3","xmm1");
 718         &pxor   ("xmm3","xmm2");
 719         &pshufb ("xmm3","xmm5");
 720
 721         &movdqa ("xmm2",&QWP(0x20,$inp));
 722         &pshufb ("xmm2","xmm4");
 723         &pxor   ("xmm2","xmm3");
 724         &movdqa ("xmm3",&QWP(0x30,$inp));
 725         &pshufb ("xmm3","xmm1");
 726         &pxor   ("xmm3","xmm2");
 727         &pshufb ("xmm3","xmm5");
 728
 729         &movdqa ("xmm2",&QWP(0x40,$inp));
 730         &pshufb ("xmm2","xmm4");
 731         &pxor   ("xmm2","xmm3");
 732         &movdqa ("xmm3",&QWP(0x50,$inp));
 733         &pshufb ("xmm3","xmm1");
 734         &pxor   ("xmm3","xmm2");
 735         &pshufb ("xmm3","xmm5");
 736
 737         &movdqa ("xmm2",&QWP(0x60,$inp));
 738         &pshufb ("xmm2","xmm4");
 739         &pxor   ("xmm2","xmm3");
 740         &movdqa ("xmm3",&QWP(0x70,$inp));
 741         &pshufb ("xmm3","xmm1");
 742         &pxor   ("xmm3","xmm2");
 743
 744         &add    ($key,-16);
 745
 746 &set_label("schedule_mangle_both");
 747         &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
 748         &pshufb ("xmm3","xmm1");
 749         &add    ($magic,-16);
 750         &and    ($magic,0x30);
 751         &movdqu (&QWP(0,$key),"xmm3");
 752         &ret    ();
 753 &function_end_B("_vpaes_schedule_mangle");
 754
 755 #
 756 # Interface to OpenSSL
 757 #
 758 &function_begin("${PREFIX}_set_encrypt_key");
 759         &mov    ($inp,&wparam(0));              # inp
 760         &lea    ($base,&DWP(-56,"esp"));
 761         &mov    ($round,&wparam(1));            # bits
 762         &and    ($base,-16);
 763         &mov    ($key,&wparam(2));              # key
 764         &xchg   ($base,"esp");                  # alloca
 765         &mov    (&DWP(48,"esp"),$base);
 766
 767         &mov    ($base,$round);
 768         &shr    ($base,5);
 769         &add    ($base,5);
 770         &mov    (&DWP(240,$key),$base);         # AES_KEY->rounds = nbits/32+5;
 771         &mov    ($magic,0x30);
 772         &mov    ($out,0);
 773
 774         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 775         &call   ("_vpaes_schedule_core");
 776 &set_label("pic_point");
 777
 778         &mov    ("esp",&DWP(48,"esp"));
 779         &xor    ("eax","eax");
 780 &function_end("${PREFIX}_set_encrypt_key");
 781
 782 &function_begin("${PREFIX}_set_decrypt_key");
 783         &mov    ($inp,&wparam(0));              # inp
 784         &lea    ($base,&DWP(-56,"esp"));
 785         &mov    ($round,&wparam(1));            # bits
 786         &and    ($base,-16);
 787         &mov    ($key,&wparam(2));              # key
 788         &xchg   ($base,"esp");                  # alloca
 789         &mov    (&DWP(48,"esp"),$base);
 790
 791         &mov    ($base,$round);
 792         &shr    ($base,5);
 793         &add    ($base,5);
 794         &mov    (&DWP(240,$key),$base); # AES_KEY->rounds = nbits/32+5;
 795         &shl    ($base,4);
 796         &lea    ($key,&DWP(16,$key,$base));
 797
 798         &mov    ($out,1);
 799         &mov    ($magic,$round);
 800         &shr    ($magic,1);
 801         &and    ($magic,32);
 802         &xor    ($magic,32);                    # nbist==192?0:32;
 803
 804         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 805         &call   ("_vpaes_schedule_core");
 806 &set_label("pic_point");
 807
 808         &mov    ("esp",&DWP(48,"esp"));
 809         &xor    ("eax","eax");
 810 &function_end("${PREFIX}_set_decrypt_key");
 811
 812 &function_begin("${PREFIX}_encrypt");
 813         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 814         &call   ("_vpaes_preheat");
 815 &set_label("pic_point");
 816         &mov    ($inp,&wparam(0));              # inp
 817         &lea    ($base,&DWP(-56,"esp"));
 818         &mov    ($out,&wparam(1));              # out
 819         &and    ($base,-16);
 820         &mov    ($key,&wparam(2));              # key
 821         &xchg   ($base,"esp");                  # alloca
 822         &mov    (&DWP(48,"esp"),$base);
 823
 824         &movdqu ("xmm0",&QWP(0,$inp));
 825         &call   ("_vpaes_encrypt_core");
 826         &movdqu (&QWP(0,$out),"xmm0");
 827
 828         &mov    ("esp",&DWP(48,"esp"));
 829 &function_end("${PREFIX}_encrypt");
 830
 831 &function_begin("${PREFIX}_decrypt");
 832         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 833         &call   ("_vpaes_preheat");
 834 &set_label("pic_point");
 835         &mov    ($inp,&wparam(0));              # inp
 836         &lea    ($base,&DWP(-56,"esp"));
 837         &mov    ($out,&wparam(1));              # out
 838         &and    ($base,-16);
 839         &mov    ($key,&wparam(2));              # key
 840         &xchg   ($base,"esp");                  # alloca
 841         &mov    (&DWP(48,"esp"),$base);
 842
 843         &movdqu ("xmm0",&QWP(0,$inp));
 844         &call   ("_vpaes_decrypt_core");
 845         &movdqu (&QWP(0,$out),"xmm0");
 846
 847         &mov    ("esp",&DWP(48,"esp"));
 848 &function_end("${PREFIX}_decrypt");
 849
 850 &function_begin("${PREFIX}_cbc_encrypt");
 851         &mov    ($inp,&wparam(0));              # inp
 852         &mov    ($out,&wparam(1));              # out
 853         &mov    ($round,&wparam(2));            # len
 854         &mov    ($key,&wparam(3));              # key
 855         &sub    ($round,16);
 856         &jc     (&label("cbc_abort"));
 857         &lea    ($base,&DWP(-56,"esp"));
 858         &mov    ($const,&wparam(4));            # ivp
 859         &and    ($base,-16);
 860         &mov    ($magic,&wparam(5));            # enc
 861         &xchg   ($base,"esp");                  # alloca
 862         &movdqu ("xmm1",&QWP(0,$const));        # load IV
 863         &sub    ($out,$inp);
 864         &mov    (&DWP(48,"esp"),$base);
 865
 866         &mov    (&DWP(0,"esp"),$out);           # save out
 867         &mov    (&DWP(4,"esp"),$key)            # save key
 868         &mov    (&DWP(8,"esp"),$const);         # save ivp
 869         &mov    ($out,$round);                  # $out works as $len
 870
 871         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 872         &call   ("_vpaes_preheat");
 873 &set_label("pic_point");
 874         &cmp    ($magic,0);
 875         &je     (&label("cbc_dec_loop"));
 876         &jmp    (&label("cbc_enc_loop"));
 877
 878 &set_label("cbc_enc_loop",16);
 879         &movdqu ("xmm0",&QWP(0,$inp));          # load input
 880         &pxor   ("xmm0","xmm1");                # inp^=iv
 881         &call   ("_vpaes_encrypt_core");
 882         &mov    ($base,&DWP(0,"esp"));          # restore out
 883         &mov    ($key,&DWP(4,"esp"));           # restore key
 884         &movdqa ("xmm1","xmm0");
 885         &movdqu (&QWP(0,$base,$inp),"xmm0");    # write output
 886         &lea    ($inp,&DWP(16,$inp));
 887         &sub    ($out,16);
 888         &jnc    (&label("cbc_enc_loop"));
 889         &jmp    (&label("cbc_done"));
 890
 891 &set_label("cbc_dec_loop",16);
 892         &movdqu ("xmm0",&QWP(0,$inp));          # load input
 893         &movdqa (&QWP(16,"esp"),"xmm1");        # save IV
 894         &movdqa (&QWP(32,"esp"),"xmm0");        # save future IV
 895         &call   ("_vpaes_decrypt_core");
 896         &mov    ($base,&DWP(0,"esp"));          # restore out
 897         &mov    ($key,&DWP(4,"esp"));           # restore key
 898         &pxor   ("xmm0",&QWP(16,"esp"));        # out^=iv
 899         &movdqa ("xmm1",&QWP(32,"esp"));        # load next IV
 900         &movdqu (&QWP(0,$base,$inp),"xmm0");    # write output
 901         &lea    ($inp,&DWP(16,$inp));
 902         &sub    ($out,16);
 903         &jnc    (&label("cbc_dec_loop"));
 904
 905 &set_label("cbc_done");
 906         &mov    ($base,&DWP(8,"esp"));          # restore ivp
 907         &mov    ("esp",&DWP(48,"esp"));
 908         &movdqu (&QWP(0,$base),"xmm1");         # write IV
 909 &set_label("cbc_abort");
 910 &function_end("${PREFIX}_cbc_encrypt");
 911
 912 &asm_finish();
 913
 914 close STDOUT;