crypto/aes/asm/vpaes-x86.pl

   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(**)    28.1/41.4/18.3          21.9/25.2(***)
  31 # Nehalem       27.9/40.4/18.1          10.2/11.9
  32 # Atom          70.7/92.1/60.1          61.1/75.4(***)
  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 +28%/64%  improvement on Core 2
  44 #       and +15% on Atom (as implied, over "hyper-threading-safe"
  45 #       code path).
  46 #
  47 #                                               <appro@openssl.org>
  48
  49 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  50 push(@INC,"${dir}","${dir}../../perlasm");
  51 require "x86asm.pl";
  52
  53 &asm_init($ARGV[0],"vpaes-x86.pl",$x86only = $ARGV[$#ARGV] eq "386");
  54
  55 $PREFIX="vpaes";
  56
  57 my  ($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,$const));
 185         &pandn  ("xmm1","xmm0");
 186         &pand   ("xmm0","xmm6");
 187         &movdqu ("xmm5",&QWP(0,$key));
 188         &pshufb ("xmm2","xmm0");
 189         &movdqa ("xmm0",&QWP($k_ipt+16,$const));
 190         &pxor   ("xmm2","xmm5");
 191         &psrld  ("xmm1",4);
 192         &add    ($key,16);
 193         &pshufb ("xmm0","xmm1");
 194         &lea    ($base,&DWP($k_mc_backward,$const));
 195         &pxor   ("xmm0","xmm2");
 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         &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sb1t
 203         &pshufb ("xmm4","xmm2");                # 4 = sb1u
 204         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 205         &pxor   ("xmm4","xmm5");                # 4 = sb1u + k
 206         &movdqa ("xmm5",&QWP($k_sb2,$const));   # 4 : sb2u
 207         &pxor   ("xmm0","xmm4");                # 0 = A
 208         &movdqa ("xmm1",&QWP(-0x40,$base,$magic));# .Lk_mc_forward[]
 209         &pshufb ("xmm5","xmm2");                # 4 = sb2u
 210         &movdqa ("xmm2",&QWP($k_sb2+16,$const));# 2 : sb2t
 211         &movdqa ("xmm4",&QWP(0,$base,$magic));  # .Lk_mc_backward[]
 212         &pshufb ("xmm2","xmm3");                # 2 = sb2t
 213         &movdqa ("xmm3","xmm0");                # 3 = A
 214         &pxor   ("xmm2","xmm5");                # 2 = 2A
 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    ($magic,0x30);                  # ... mod 4
 223         &sub    ($round,1);                     # nr--
 224         &pxor   ("xmm0","xmm3");                # 0 = 2A+3B+C+D
 225
 226 &set_label("enc_entry");
 227         # top of round
 228         &movdqa ("xmm1","xmm6");                # 1 : i
 229         &movdqa ("xmm5",&QWP($k_inv+16,$const));# 2 : a/k
 230         &pandn  ("xmm1","xmm0");                # 1 = i<<4
 231         &psrld  ("xmm1",4);                     # 1 = i
 232         &pand   ("xmm0","xmm6");                # 0 = k
 233         &pshufb ("xmm5","xmm0");                # 2 = a/k
 234         &movdqa ("xmm3","xmm7");                # 3 : 1/i
 235         &pxor   ("xmm0","xmm1");                # 0 = j
 236         &pshufb ("xmm3","xmm1");                # 3 = 1/i
 237         &movdqa ("xmm4","xmm7");                # 4 : 1/j
 238         &pxor   ("xmm3","xmm5");                # 3 = iak = 1/i + a/k
 239         &pshufb ("xmm4","xmm0");                # 4 = 1/j
 240         &movdqa ("xmm2","xmm7");                # 2 : 1/iak
 241         &pxor   ("xmm4","xmm5");                # 4 = jak = 1/j + a/k
 242         &pshufb ("xmm2","xmm3");                # 2 = 1/iak
 243         &movdqa ("xmm3","xmm7");                # 3 : 1/jak
 244         &pxor   ("xmm2","xmm0");                # 2 = io
 245         &pshufb ("xmm3","xmm4");                # 3 = 1/jak
 246         &movdqu ("xmm5",&QWP(0,$key));
 247         &pxor   ("xmm3","xmm1");                # 3 = jo
 248         &jnz    (&label("enc_loop"));
 249
 250         # middle of last round
 251         &movdqa ("xmm4",&QWP($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,$magic));# .Lk_sr[]
 257         &pxor   ("xmm0","xmm4");                # 0 = A
 258         &pshufb ("xmm0","xmm1");
 259         &ret    ();
 260 &function_end_B("_vpaes_encrypt_core");
 261
 262 ##
 263 ##  Decryption core
 264 ##
 265 ##  Same API as encryption core.
 266 ##
 267 &function_begin_B("_vpaes_decrypt_core");
 268         &lea    ($base,&DWP($k_dsbd,$const));
 269         &mov    ($round,&DWP(240,$key));
 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,$base));     # 4 : sb9u
 295         &movdqa ("xmm1",&QWP(-0x10,$base));     # 0 : sb9t
 296         &pshufb ("xmm4","xmm2");                # 4 = sb9u
 297         &pshufb ("xmm1","xmm3");                # 0 = sb9t
 298         &pxor   ("xmm0","xmm4");
 299         &movdqa ("xmm4",&QWP(0,$base));         # 4 : sbdu
 300         &pxor   ("xmm0","xmm1");                # 0 = ch
 301         &movdqa ("xmm1",&QWP(0x10,$base));      # 0 : sbdt
 302
 303         &pshufb ("xmm4","xmm2");                # 4 = sbdu
 304         &pshufb ("xmm0","xmm5");                # MC ch
 305         &pshufb ("xmm1","xmm3");                # 0 = sbdt
 306         &pxor   ("xmm0","xmm4");                # 4 = ch
 307         &movdqa ("xmm4",&QWP(0x20,$base));      # 4 : sbbu
 308         &pxor   ("xmm0","xmm1");                # 0 = ch
 309         &movdqa ("xmm1",&QWP(0x30,$base));      # 0 : sbbt
 310
 311         &pshufb ("xmm4","xmm2");                # 4 = sbbu
 312         &pshufb ("xmm0","xmm5");                # MC ch
 313         &pshufb ("xmm1","xmm3");                # 0 = sbbt
 314         &pxor   ("xmm0","xmm4");                # 4 = ch
 315         &movdqa ("xmm4",&QWP(0x40,$base));      # 4 : sbeu
 316         &pxor   ("xmm0","xmm1");                # 0 = ch
 317         &movdqa ("xmm1",&QWP(0x50,$base));      # 0 : sbet
 318
 319         &pshufb ("xmm4","xmm2");                # 4 = sbeu
 320         &pshufb ("xmm0","xmm5");                # MC ch
 321         &pshufb ("xmm1","xmm3");                # 0 = sbet
 322         &pxor   ("xmm0","xmm4");                # 4 = ch
 323         &add    ($key,16);                      # next round key
 324         &palignr("xmm5","xmm5",12);
 325         &pxor   ("xmm0","xmm1");                # 0 = ch
 326         &sub    ($round,1);                     # nr--
 327
 328 &set_label("dec_entry");
 329         # top of round
 330         &movdqa ("xmm1","xmm6");                # 1 : i
 331         &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k
 332         &pandn  ("xmm1","xmm0");                # 1 = i<<4
 333         &pand   ("xmm0","xmm6");                # 0 = k
 334         &psrld  ("xmm1",4);                     # 1 = i
 335         &pshufb ("xmm2","xmm0");                # 2 = a/k
 336         &movdqa ("xmm3","xmm7");                # 3 : 1/i
 337         &pxor   ("xmm0","xmm1");                # 0 = j
 338         &pshufb ("xmm3","xmm1");                # 3 = 1/i
 339         &movdqa ("xmm4","xmm7");                # 4 : 1/j
 340         &pxor   ("xmm3","xmm2");                # 3 = iak = 1/i + a/k
 341         &pshufb ("xmm4","xmm0");                # 4 = 1/j
 342         &pxor   ("xmm4","xmm2");                # 4 = jak = 1/j + a/k
 343         &movdqa ("xmm2","xmm7");                # 2 : 1/iak
 344         &pshufb ("xmm2","xmm3");                # 2 = 1/iak
 345         &movdqa ("xmm3","xmm7");                # 3 : 1/jak
 346         &pxor   ("xmm2","xmm0");                # 2 = io
 347         &pshufb ("xmm3","xmm4");                # 3 = 1/jak
 348         &movdqu ("xmm0",&QWP(0,$key));
 349         &pxor   ("xmm3","xmm1");                # 3 = jo
 350         &jnz    (&label("dec_loop"));
 351
 352         # middle of last round
 353         &movdqa ("xmm4",&QWP(0x60,$base));      # 3 : sbou
 354         &pshufb ("xmm4","xmm2");                # 4 = sbou
 355         &pxor   ("xmm4","xmm0");                # 4 = sb1u + k
 356         &movdqa ("xmm0",&QWP(0x70,$base));      # 0 : sbot
 357         &movdqa ("xmm2",&QWP(0,$magic));
 358         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 359         &pxor   ("xmm0","xmm4");                # 0 = A
 360         &pshufb ("xmm0","xmm2");
 361         &ret    ();
 362 &function_end_B("_vpaes_decrypt_core");
 363
 364 ########################################################
 365 ##                                                    ##
 366 ##                  AES key schedule                  ##
 367 ##                                                    ##
 368 ########################################################
 369 &function_begin_B("_vpaes_schedule_core");
 370         &add    ($const,&DWP(0,"esp"));
 371         &movdqu ("xmm0",&QWP(0,$inp));          # load key (unaligned)
 372         &movdqa ("xmm2",&QWP($k_rcon,$const));  # load rcon
 373
 374         # input transform
 375         &movdqa ("xmm3","xmm0");
 376         &lea    ($base,&DWP($k_ipt,$const));
 377         &movdqa (&QWP(4,"esp"),"xmm2");         # xmm8
 378         &call   ("_vpaes_schedule_transform");
 379         &movdqa ("xmm7","xmm0");
 380
 381         &test   ($out,$out);
 382         &jnz    (&label("schedule_am_decrypting"));
 383
 384         # encrypting, output zeroth round key after transform
 385         &movdqu (&QWP(0,$key),"xmm0");
 386         &jmp    (&label("schedule_go"));
 387
 388 &set_label("schedule_am_decrypting");
 389         # decrypting, output zeroth round key after shiftrows
 390         &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
 391         &pshufb ("xmm3","xmm1");
 392         &movdqu (&QWP(0,$key),"xmm3");
 393         &xor    ($magic,0x30);
 394
 395 &set_label("schedule_go");
 396         &cmp    ($round,192);
 397         &ja     (&label("schedule_256"));
 398         &je     (&label("schedule_192"));
 399         # 128: fall though
 400
 401 ##
 402 ##  .schedule_128
 403 ##
 404 ##  128-bit specific part of key schedule.
 405 ##
 406 ##  This schedule is really simple, because all its parts
 407 ##  are accomplished by the subroutines.
 408 ##
 409 &set_label("schedule_128");
 410         &mov    ($round,10);
 411
 412 &set_label("loop_schedule_128");
 413         &call   ("_vpaes_schedule_round");
 414         &dec    ($round);
 415         &jz     (&label("schedule_mangle_last"));
 416         &call   ("_vpaes_schedule_mangle");     # write output
 417         &jmp    (&label("loop_schedule_128"));
 418
 419 ##
 420 ##  .aes_schedule_192
 421 ##
 422 ##  192-bit specific part of key schedule.
 423 ##
 424 ##  The main body of this schedule is the same as the 128-bit
 425 ##  schedule, but with more smearing.  The long, high side is
 426 ##  stored in %xmm7 as before, and the short, low side is in
 427 ##  the high bits of %xmm6.
 428 ##
 429 ##  This schedule is somewhat nastier, however, because each
 430 ##  round produces 192 bits of key material, or 1.5 round keys.
 431 ##  Therefore, on each cycle we do 2 rounds and produce 3 round
 432 ##  keys.
 433 ##
 434 &set_label("schedule_192",16);
 435         &movdqu ("xmm0",&QWP(8,$inp));          # load key part 2 (very unaligned)
 436         &call   ("_vpaes_schedule_transform");  # input transform
 437         &movdqa ("xmm6","xmm0");                # save short part
 438         &pxor   ("xmm4","xmm4");                # clear 4
 439         &movhlps("xmm6","xmm4");                # clobber low side with zeros
 440         &mov    ($round,4);
 441
 442 &set_label("loop_schedule_192");
 443         &call   ("_vpaes_schedule_round");
 444         &palignr("xmm0","xmm6",8);
 445         &call   ("_vpaes_schedule_mangle");     # save key n
 446         &call   ("_vpaes_schedule_192_smear");
 447         &call   ("_vpaes_schedule_mangle");     # save key n+1
 448         &call   ("_vpaes_schedule_round");
 449         &dec    ($round);
 450         &jz     (&label("schedule_mangle_last"));
 451         &call   ("_vpaes_schedule_mangle");     # save key n+2
 452         &call   ("_vpaes_schedule_192_smear");
 453         &jmp    (&label("loop_schedule_192"));
 454
 455 ##
 456 ##  .aes_schedule_256
 457 ##
 458 ##  256-bit specific part of key schedule.
 459 ##
 460 ##  The structure here is very similar to the 128-bit
 461 ##  schedule, but with an additional "low side" in
 462 ##  %xmm6.  The low side's rounds are the same as the
 463 ##  high side's, except no rcon and no rotation.
 464 ##
 465 &set_label("schedule_256",16);
 466         &movdqu ("xmm0",&QWP(16,$inp));         # load key part 2 (unaligned)
 467         &call   ("_vpaes_schedule_transform");  # input transform
 468         &mov    ($round,7);
 469
 470 &set_label("loop_schedule_256");
 471         &call   ("_vpaes_schedule_mangle");     # output low result
 472         &movdqa ("xmm6","xmm0");                # save cur_lo in xmm6
 473
 474         # high round
 475         &call   ("_vpaes_schedule_round");
 476         &dec    ($round);
 477         &jz     (&label("schedule_mangle_last"));
 478         &call   ("_vpaes_schedule_mangle");
 479
 480         # low round. swap xmm7 and xmm6
 481         &pshufd ("xmm0","xmm0",0xFF);
 482         &movdqa (&QWP(20,"esp"),"xmm7");
 483         &movdqa ("xmm7","xmm6");
 484         &call   ("_vpaes_schedule_low_round");
 485         &movdqa ("xmm7",&QWP(20,"esp"));
 486
 487         &jmp    (&label("loop_schedule_256"));
 488
 489 ##
 490 ##  .aes_schedule_mangle_last
 491 ##
 492 ##  Mangler for last round of key schedule
 493 ##  Mangles %xmm0
 494 ##    when encrypting, outputs out(%xmm0) ^ 63
 495 ##    when decrypting, outputs unskew(%xmm0)
 496 ##
 497 ##  Always called right before return... jumps to cleanup and exits
 498 ##
 499 &set_label("schedule_mangle_last",16);
 500         # schedule last round key from xmm0
 501         &lea    ($base,&DWP($k_deskew,$const));
 502         &test   ($out,$out);
 503         &jnz    (&label("schedule_mangle_last_dec"));
 504
 505         # encrypting
 506         &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
 507         &pshufb ("xmm0","xmm1");                # output permute
 508         &lea    ($base,&DWP($k_opt,$const));    # prepare to output transform
 509         &add    ($key,32);
 510
 511 &set_label("schedule_mangle_last_dec");
 512         &add    ($key,-16);
 513         &pxor   ("xmm0",&QWP($k_s63,$const));
 514         &call   ("_vpaes_schedule_transform");  # output transform
 515         &movdqu (&QWP(0,$key),"xmm0");          # save last key
 516
 517         # cleanup
 518         &pxor   ("xmm0","xmm0");
 519         &pxor   ("xmm1","xmm1");
 520         &pxor   ("xmm2","xmm2");
 521         &pxor   ("xmm3","xmm3");
 522         &pxor   ("xmm4","xmm4");
 523         &pxor   ("xmm5","xmm5");
 524         &pxor   ("xmm6","xmm6");
 525         &pxor   ("xmm7","xmm7");
 526         &ret    ();
 527 &function_end_B("_vpaes_schedule_core");
 528
 529 ##
 530 ##  .aes_schedule_192_smear
 531 ##
 532 ##  Smear the short, low side in the 192-bit key schedule.
 533 ##
 534 ##  Inputs:
 535 ##    %xmm7: high side, b  a  x  y
 536 ##    %xmm6:  low side, d  c  0  0
 537 ##    %xmm13: 0
 538 ##
 539 ##  Outputs:
 540 ##    %xmm6: b+c+d  b+c  0  0
 541 ##    %xmm0: b+c+d  b+c  b  a
 542 ##
 543 &function_begin_B("_vpaes_schedule_192_smear");
 544         &pshufd ("xmm1","xmm6",0x80);           # d c 0 0 -> c 0 0 0
 545         &pshufd ("xmm0","xmm7",0xFE);           # b a _ _ -> b b b a
 546         &pxor   ("xmm6","xmm1");                # -> c+d c 0 0
 547         &pxor   ("xmm1","xmm1");
 548         &pxor   ("xmm6","xmm0");                # -> b+c+d b+c b a
 549         &movdqa ("xmm0","xmm6");
 550         &movhlps("xmm6","xmm1");                # clobber low side with zeros
 551         &ret    ();
 552 &function_end_B("_vpaes_schedule_192_smear");
 553
 554 ##
 555 ##  .aes_schedule_round
 556 ##
 557 ##  Runs one main round of the key schedule on %xmm0, %xmm7
 558 ##
 559 ##  Specifically, runs subbytes on the high dword of %xmm0
 560 ##  then rotates it by one byte and xors into the low dword of
 561 ##  %xmm7.
 562 ##
 563 ##  Adds rcon from low byte of %xmm8, then rotates %xmm8 for
 564 ##  next rcon.
 565 ##
 566 ##  Smears the dwords of %xmm7 by xoring the low into the
 567 ##  second low, result into third, result into highest.
 568 ##
 569 ##  Returns results in %xmm7 = %xmm0.
 570 ##  Clobbers %xmm1-%xmm5.
 571 ##
 572 &function_begin_B("_vpaes_schedule_round");
 573         # extract rcon from xmm8
 574         &movdqa ("xmm2",&QWP(8,"esp"));         # xmm8
 575         &pxor   ("xmm1","xmm1");
 576         &palignr("xmm1","xmm2",15);
 577         &palignr("xmm2","xmm2",15);
 578         &pxor   ("xmm7","xmm1");
 579
 580         # rotate
 581         &pshufd ("xmm0","xmm0",0xFF);
 582         &palignr("xmm0","xmm0",1);
 583
 584         # fall through...
 585         &movdqa (&QWP(8,"esp"),"xmm2");         # xmm8
 586
 587         # low round: same as high round, but no rotation and no rcon.
 588 &set_label("_vpaes_schedule_low_round");
 589         # smear xmm7
 590         &movdqa ("xmm1","xmm7");
 591         &pslldq ("xmm7",4);
 592         &pxor   ("xmm7","xmm1");
 593         &movdqa ("xmm1","xmm7");
 594         &pslldq ("xmm7",8);
 595         &pxor   ("xmm7","xmm1");
 596         &pxor   ("xmm7",&QWP($k_s63,$const));
 597
 598         # subbyte
 599         &movdqa ("xmm4",&QWP($k_s0F,$const));
 600         &movdqa ("xmm5",&QWP($k_inv,$const));   # 4 : 1/j
 601         &movdqa ("xmm1","xmm4");
 602         &pandn  ("xmm1","xmm0");
 603         &psrld  ("xmm1",4);                     # 1 = i
 604         &pand   ("xmm0","xmm4");                # 0 = k
 605         &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k
 606         &pshufb ("xmm2","xmm0");                # 2 = a/k
 607         &pxor   ("xmm0","xmm1");                # 0 = j
 608         &movdqa ("xmm3","xmm5");                # 3 : 1/i
 609         &pshufb ("xmm3","xmm1");                # 3 = 1/i
 610         &pxor   ("xmm3","xmm2");                # 3 = iak = 1/i + a/k
 611         &movdqa ("xmm4","xmm5");                # 4 : 1/j
 612         &pshufb ("xmm4","xmm0");                # 4 = 1/j
 613         &pxor   ("xmm4","xmm2");                # 4 = jak = 1/j + a/k
 614         &movdqa ("xmm2","xmm5");                # 2 : 1/iak
 615         &pshufb ("xmm2","xmm3");                # 2 = 1/iak
 616         &pxor   ("xmm2","xmm0");                # 2 = io
 617         &movdqa ("xmm3","xmm5");                # 3 : 1/jak
 618         &pshufb ("xmm3","xmm4");                # 3 = 1/jak
 619         &pxor   ("xmm3","xmm1");                # 3 = jo
 620         &movdqa ("xmm4",&QWP($k_sb1,$const));   # 4 : sbou
 621         &pshufb ("xmm4","xmm2");                # 4 = sbou
 622         &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sbot
 623         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 624         &pxor   ("xmm0","xmm4");                # 0 = sbox output
 625
 626         # add in smeared stuff
 627         &pxor   ("xmm0","xmm7");
 628         &movdqa ("xmm7","xmm0");
 629         &ret    ();
 630 &function_end_B("_vpaes_schedule_round");
 631
 632 ##
 633 ##  .aes_schedule_transform
 634 ##
 635 ##  Linear-transform %xmm0 according to tables at (%ebx)
 636 ##
 637 ##  Output in %xmm0
 638 ##  Clobbers %xmm1, %xmm2
 639 ##
 640 &function_begin_B("_vpaes_schedule_transform");
 641         &movdqa ("xmm2",&QWP($k_s0F,$const));
 642         &movdqa ("xmm1","xmm2");
 643         &pandn  ("xmm1","xmm0");
 644         &psrld  ("xmm1",4);
 645         &pand   ("xmm0","xmm2");
 646         &movdqa ("xmm2",&QWP(0,$base));
 647         &pshufb ("xmm2","xmm0");
 648         &movdqa ("xmm0",&QWP(16,$base));
 649         &pshufb ("xmm0","xmm1");
 650         &pxor   ("xmm0","xmm2");
 651         &ret    ();
 652 &function_end_B("_vpaes_schedule_transform");
 653
 654 ##
 655 ##  .aes_schedule_mangle
 656 ##
 657 ##  Mangle xmm0 from (basis-transformed) standard version
 658 ##  to our version.
 659 ##
 660 ##  On encrypt,
 661 ##    xor with 0x63
 662 ##    multiply by circulant 0,1,1,1
 663 ##    apply shiftrows transform
 664 ##
 665 ##  On decrypt,
 666 ##    xor with 0x63
 667 ##    multiply by "inverse mixcolumns" circulant E,B,D,9
 668 ##    deskew
 669 ##    apply shiftrows transform
 670 ##
 671 ##
 672 ##  Writes out to (%edx), and increments or decrements it
 673 ##  Keeps track of round number mod 4 in %ecx
 674 ##  Preserves xmm0
 675 ##  Clobbers xmm1-xmm5
 676 ##
 677 &function_begin_B("_vpaes_schedule_mangle");
 678         &movdqa ("xmm4","xmm0");        # save xmm0 for later
 679         &movdqa ("xmm5",&QWP($k_mc_forward,$const));
 680         &test   ($out,$out);
 681         &jnz    (&label("schedule_mangle_dec"));
 682
 683         # encrypting
 684         &add    ($key,16);
 685         &pxor   ("xmm4",&QWP($k_s63,$const));
 686         &pshufb ("xmm4","xmm5");
 687         &movdqa ("xmm3","xmm4");
 688         &pshufb ("xmm4","xmm5");
 689         &pxor   ("xmm3","xmm4");
 690         &pshufb ("xmm4","xmm5");
 691         &pxor   ("xmm3","xmm4");
 692
 693         &jmp    (&label("schedule_mangle_both"));
 694
 695 &set_label("schedule_mangle_dec",16);
 696         # inverse mix columns
 697         &movdqa ("xmm2",&QWP($k_s0F,$const));
 698         &lea    ($inp,&DWP($k_dksd,$const));
 699         &movdqa ("xmm1","xmm2");
 700         &pandn  ("xmm1","xmm4");
 701         &psrld  ("xmm1",4);                     # 1 = hi
 702         &pand   ("xmm4","xmm2");                # 4 = lo
 703
 704         &movdqa ("xmm2",&QWP(0,$inp));
 705         &pshufb ("xmm2","xmm4");
 706         &movdqa ("xmm3",&QWP(0x10,$inp));
 707         &pshufb ("xmm3","xmm1");
 708         &pxor   ("xmm3","xmm2");
 709         &pshufb ("xmm3","xmm5");
 710
 711         &movdqa ("xmm2",&QWP(0x20,$inp));
 712         &pshufb ("xmm2","xmm4");
 713         &pxor   ("xmm2","xmm3");
 714         &movdqa ("xmm3",&QWP(0x30,$inp));
 715         &pshufb ("xmm3","xmm1");
 716         &pxor   ("xmm3","xmm2");
 717         &pshufb ("xmm3","xmm5");
 718
 719         &movdqa ("xmm2",&QWP(0x40,$inp));
 720         &pshufb ("xmm2","xmm4");
 721         &pxor   ("xmm2","xmm3");
 722         &movdqa ("xmm3",&QWP(0x50,$inp));
 723         &pshufb ("xmm3","xmm1");
 724         &pxor   ("xmm3","xmm2");
 725         &pshufb ("xmm3","xmm5");
 726
 727         &movdqa ("xmm2",&QWP(0x60,$inp));
 728         &pshufb ("xmm2","xmm4");
 729         &pxor   ("xmm2","xmm3");
 730         &movdqa ("xmm3",&QWP(0x70,$inp));
 731         &pshufb ("xmm3","xmm1");
 732         &pxor   ("xmm3","xmm2");
 733
 734         &add    ($key,-16);
 735
 736 &set_label("schedule_mangle_both");
 737         &movdqa ("xmm1",&QWP($k_sr,$const,$magic));
 738         &pshufb ("xmm3","xmm1");
 739         &add    ($magic,-16);
 740         &and    ($magic,0x30);
 741         &movdqu (&QWP(0,$key),"xmm3");
 742         &ret    ();
 743 &function_end_B("_vpaes_schedule_mangle");
 744
 745 #
 746 # Interface to OpenSSL
 747 #
 748 &function_begin("${PREFIX}_set_encrypt_key");
 749         &mov    ($inp,&wparam(0));              # inp
 750         &lea    ($base,&DWP(-56,"esp"));
 751         &mov    ($round,&wparam(1));            # bits
 752         &and    ($base,-16);
 753         &mov    ($key,&wparam(2));              # key
 754         &xchg   ($base,"esp");                  # alloca
 755         &mov    (&DWP(48,"esp"),$base);
 756
 757         &mov    ($base,$round);
 758         &shr    ($base,5);
 759         &add    ($base,5);
 760         &mov    (&DWP(240,$key),$base);         # AES_KEY->rounds = nbits/32+5;
 761         &mov    ($magic,0x30);
 762         &mov    ($out,0);
 763
 764         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 765         &call   ("_vpaes_schedule_core");
 766 &set_label("pic_point");
 767
 768         &mov    ("esp",&DWP(48,"esp"));
 769         &xor    ("eax","eax");
 770 &function_end("${PREFIX}_set_encrypt_key");
 771
 772 &function_begin("${PREFIX}_set_decrypt_key");
 773         &mov    ($inp,&wparam(0));              # inp
 774         &lea    ($base,&DWP(-56,"esp"));
 775         &mov    ($round,&wparam(1));            # bits
 776         &and    ($base,-16);
 777         &mov    ($key,&wparam(2));              # key
 778         &xchg   ($base,"esp");                  # alloca
 779         &mov    (&DWP(48,"esp"),$base);
 780
 781         &mov    ($base,$round);
 782         &shr    ($base,5);
 783         &add    ($base,5);
 784         &mov    (&DWP(240,$key),$base); # AES_KEY->rounds = nbits/32+5;
 785         &shl    ($base,4);
 786         &lea    ($key,&DWP(16,$key,$base));
 787
 788         &mov    ($out,1);
 789         &mov    ($magic,$round);
 790         &shr    ($magic,1);
 791         &and    ($magic,32);
 792         &xor    ($magic,32);                    # nbist==192?0:32;
 793
 794         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 795         &call   ("_vpaes_schedule_core");
 796 &set_label("pic_point");
 797
 798         &mov    ("esp",&DWP(48,"esp"));
 799         &xor    ("eax","eax");
 800 &function_end("${PREFIX}_set_decrypt_key");
 801
 802 &function_begin("${PREFIX}_encrypt");
 803         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 804         &call   ("_vpaes_preheat");
 805 &set_label("pic_point");
 806         &mov    ($inp,&wparam(0));              # inp
 807         &lea    ($base,&DWP(-56,"esp"));
 808         &mov    ($out,&wparam(1));              # out
 809         &and    ($base,-16);
 810         &mov    ($key,&wparam(2));              # key
 811         &xchg   ($base,"esp");                  # alloca
 812         &mov    (&DWP(48,"esp"),$base);
 813
 814         &movdqu ("xmm0",&QWP(0,$inp));
 815         &call   ("_vpaes_encrypt_core");
 816         &movdqu (&QWP(0,$out),"xmm0");
 817
 818         &mov    ("esp",&DWP(48,"esp"));
 819 &function_end("${PREFIX}_encrypt");
 820
 821 &function_begin("${PREFIX}_decrypt");
 822         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 823         &call   ("_vpaes_preheat");
 824 &set_label("pic_point");
 825         &mov    ($inp,&wparam(0));              # inp
 826         &lea    ($base,&DWP(-56,"esp"));
 827         &mov    ($out,&wparam(1));              # out
 828         &and    ($base,-16);
 829         &mov    ($key,&wparam(2));              # key
 830         &xchg   ($base,"esp");                  # alloca
 831         &mov    (&DWP(48,"esp"),$base);
 832
 833         &movdqu ("xmm0",&QWP(0,$inp));
 834         &call   ("_vpaes_decrypt_core");
 835         &movdqu (&QWP(0,$out),"xmm0");
 836
 837         &mov    ("esp",&DWP(48,"esp"));
 838 &function_end("${PREFIX}_decrypt");
 839
 840 &function_begin("${PREFIX}_cbc_encrypt");
 841         &mov    ($inp,&wparam(0));              # inp
 842         &mov    ($out,&wparam(1));              # out
 843         &mov    ($round,&wparam(2));            # len
 844         &mov    ($key,&wparam(3));              # key
 845         &sub    ($round,16);
 846         &jc     (&label("cbc_abort"));
 847         &lea    ($base,&DWP(-56,"esp"));
 848         &mov    ($const,&wparam(4));            # ivp
 849         &and    ($base,-16);
 850         &mov    ($magic,&wparam(5));            # enc
 851         &xchg   ($base,"esp");                  # alloca
 852         &movdqu ("xmm1",&QWP(0,$const));        # load IV
 853         &sub    ($out,$inp);
 854         &mov    (&DWP(48,"esp"),$base);
 855
 856         &mov    (&DWP(0,"esp"),$out);           # save out
 857         &mov    (&DWP(4,"esp"),$key)            # save key
 858         &mov    (&DWP(8,"esp"),$const);         # save ivp
 859         &mov    ($out,$round);                  # $out works as $len
 860
 861         &lea    ($const,&DWP(&label("_vpaes_consts")."+0x30-".&label("pic_point")));
 862         &call   ("_vpaes_preheat");
 863 &set_label("pic_point");
 864         &cmp    ($magic,0);
 865         &je     (&label("cbc_dec_loop"));
 866         &jmp    (&label("cbc_enc_loop"));
 867
 868 &set_label("cbc_enc_loop",16);
 869         &movdqu ("xmm0",&QWP(0,$inp));          # load input
 870         &pxor   ("xmm0","xmm1");                # inp^=iv
 871         &call   ("_vpaes_encrypt_core");
 872         &mov    ($base,&DWP(0,"esp"));          # restore out
 873         &mov    ($key,&DWP(4,"esp"));           # restore key
 874         &movdqa ("xmm1","xmm0");
 875         &movdqu (&QWP(0,$base,$inp),"xmm0");    # write output
 876         &lea    ($inp,&DWP(16,$inp));
 877         &sub    ($out,16);
 878         &jnc    (&label("cbc_enc_loop"));
 879         &jmp    (&label("cbc_done"));
 880
 881 &set_label("cbc_dec_loop",16);
 882         &movdqu ("xmm0",&QWP(0,$inp));          # load input
 883         &movdqa (&QWP(16,"esp"),"xmm1");        # save IV
 884         &movdqa (&QWP(32,"esp"),"xmm0");        # save future IV
 885         &call   ("_vpaes_decrypt_core");
 886         &mov    ($base,&DWP(0,"esp"));          # restore out
 887         &mov    ($key,&DWP(4,"esp"));           # restore key
 888         &pxor   ("xmm0",&QWP(16,"esp"));        # out^=iv
 889         &movdqa ("xmm1",&QWP(32,"esp"));        # load next IV
 890         &movdqu (&QWP(0,$base,$inp),"xmm0");    # write output
 891         &lea    ($inp,&DWP(16,$inp));
 892         &sub    ($out,16);
 893         &jnc    (&label("cbc_dec_loop"));
 894
 895 &set_label("cbc_done");
 896         &mov    ($base,&DWP(8,"esp"));          # restore ivp
 897         &mov    ("esp",&DWP(48,"esp"));
 898         &movdqu (&QWP(0,$base),"xmm1");         # write IV
 899 &set_label("cbc_abort");
 900 &function_end("${PREFIX}_cbc_encrypt");
 901
 902 &asm_finish();