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 # Silvermont    45.4/62.9/24.1          49.2/61.1(***)
  34 #
  35 # (*)   "Hyper-threading" in the context refers rather to cache shared
  36 #       among multiple cores, than to specifically Intel HTT. As vast
  37 #       majority of contemporary cores share cache, slower code path
  38 #       is common place. In other words "with-hyper-threading-off"
  39 #       results are presented mostly for reference purposes.
  40 #
  41 # (**)  "Core 2" refers to initial 65nm design, a.k.a. Conroe.
  42 #
  43 # (***) Less impressive improvement on Core 2 and Atom is due to slow
  44 #       pshufb, yet it's respectable +28%/64%  improvement on Core 2
  45 #       and +15% on Atom (as implied, over "hyper-threading-safe"
  46 #       code path).
  47 #
  48 #                                               <appro@openssl.org>
  49
  50 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  51 push(@INC,"${dir}","${dir}../../perlasm");
  52 require "x86asm.pl";
  53
  54 &asm_init($ARGV[0],"vpaes-x86.pl",$x86only = $ARGV[$#ARGV] eq "386");
  55
  56 $PREFIX="vpaes";
  57
  58 my  ($round, $base, $magic, $key, $const, $inp, $out)=
  59     ("eax",  "ebx", "ecx",  "edx","ebp",  "esi","edi");
  60
  61 &static_label("_vpaes_consts");
  62 &static_label("_vpaes_schedule_low_round");
  63
  64 &set_label("_vpaes_consts",64);
  65 $k_inv=-0x30;           # inv, inva
  66         &data_word(0x0D080180,0x0E05060F,0x0A0B0C02,0x04070309);
  67         &data_word(0x0F0B0780,0x01040A06,0x02050809,0x030D0E0C);
  68
  69 $k_s0F=-0x10;           # s0F
  70         &data_word(0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F,0x0F0F0F0F);
  71
  72 $k_ipt=0x00;            # input transform (lo, hi)
  73         &data_word(0x5A2A7000,0xC2B2E898,0x52227808,0xCABAE090);
  74         &data_word(0x317C4D00,0x4C01307D,0xB0FDCC81,0xCD80B1FC);
  75
  76 $k_sb1=0x20;            # sb1u, sb1t
  77         &data_word(0xCB503E00,0xB19BE18F,0x142AF544,0xA5DF7A6E);
  78         &data_word(0xFAE22300,0x3618D415,0x0D2ED9EF,0x3BF7CCC1);
  79 $k_sb2=0x40;            # sb2u, sb2t
  80         &data_word(0x0B712400,0xE27A93C6,0xBC982FCD,0x5EB7E955);
  81         &data_word(0x0AE12900,0x69EB8840,0xAB82234A,0xC2A163C8);
  82 $k_sbo=0x60;            # sbou, sbot
  83         &data_word(0x6FBDC700,0xD0D26D17,0xC502A878,0x15AABF7A);
  84         &data_word(0x5FBB6A00,0xCFE474A5,0x412B35FA,0x8E1E90D1);
  85
  86 $k_mc_forward=0x80;     # mc_forward
  87         &data_word(0x00030201,0x04070605,0x080B0A09,0x0C0F0E0D);
  88         &data_word(0x04070605,0x080B0A09,0x0C0F0E0D,0x00030201);
  89         &data_word(0x080B0A09,0x0C0F0E0D,0x00030201,0x04070605);
  90         &data_word(0x0C0F0E0D,0x00030201,0x04070605,0x080B0A09);
  91
  92 $k_mc_backward=0xc0;    # mc_backward
  93         &data_word(0x02010003,0x06050407,0x0A09080B,0x0E0D0C0F);
  94         &data_word(0x0E0D0C0F,0x02010003,0x06050407,0x0A09080B);
  95         &data_word(0x0A09080B,0x0E0D0C0F,0x02010003,0x06050407);
  96         &data_word(0x06050407,0x0A09080B,0x0E0D0C0F,0x02010003);
  97
  98 $k_sr=0x100;            # sr
  99         &data_word(0x03020100,0x07060504,0x0B0A0908,0x0F0E0D0C);
 100         &data_word(0x0F0A0500,0x030E0904,0x07020D08,0x0B06010C);
 101         &data_word(0x0B020900,0x0F060D04,0x030A0108,0x070E050C);
 102         &data_word(0x070A0D00,0x0B0E0104,0x0F020508,0x0306090C);
 103
 104 $k_rcon=0x140;          # rcon
 105         &data_word(0xAF9DEEB6,0x1F8391B9,0x4D7C7D81,0x702A9808);
 106
 107 $k_s63=0x150;           # s63: all equal to 0x63 transformed
 108         &data_word(0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B,0x5B5B5B5B);
 109
 110 $k_opt=0x160;           # output transform
 111         &data_word(0xD6B66000,0xFF9F4929,0xDEBE6808,0xF7974121);
 112         &data_word(0x50BCEC00,0x01EDBD51,0xB05C0CE0,0xE10D5DB1);
 113
 114 $k_deskew=0x180;        # deskew tables: inverts the sbox's "skew"
 115         &data_word(0x47A4E300,0x07E4A340,0x5DBEF91A,0x1DFEB95A);
 116         &data_word(0x83EA6900,0x5F36B5DC,0xF49D1E77,0x2841C2AB);
 117 ##
 118 ##  Decryption stuff
 119 ##  Key schedule constants
 120 ##
 121 $k_dksd=0x1a0;          # decryption key schedule: invskew x*D
 122         &data_word(0xA3E44700,0xFEB91A5D,0x5A1DBEF9,0x0740E3A4);
 123         &data_word(0xB5368300,0x41C277F4,0xAB289D1E,0x5FDC69EA);
 124 $k_dksb=0x1c0;          # decryption key schedule: invskew x*B
 125         &data_word(0x8550D500,0x9A4FCA1F,0x1CC94C99,0x03D65386);
 126         &data_word(0xB6FC4A00,0x115BEDA7,0x7E3482C8,0xD993256F);
 127 $k_dkse=0x1e0;          # decryption key schedule: invskew x*E + 0x63
 128         &data_word(0x1FC9D600,0xD5031CCA,0x994F5086,0x53859A4C);
 129         &data_word(0x4FDC7BE8,0xA2319605,0x20B31487,0xCD5EF96A);
 130 $k_dks9=0x200;          # decryption key schedule: invskew x*9
 131         &data_word(0x7ED9A700,0xB6116FC8,0x82255BFC,0x4AED9334);
 132         &data_word(0x27143300,0x45765162,0xE9DAFDCE,0x8BB89FAC);
 133
 134 ##
 135 ##  Decryption stuff
 136 ##  Round function constants
 137 ##
 138 $k_dipt=0x220;          # decryption input transform
 139         &data_word(0x0B545F00,0x0F505B04,0x114E451A,0x154A411E);
 140         &data_word(0x60056500,0x86E383E6,0xF491F194,0x12771772);
 141
 142 $k_dsb9=0x240;          # decryption sbox output *9*u, *9*t
 143         &data_word(0x9A86D600,0x851C0353,0x4F994CC9,0xCAD51F50);
 144         &data_word(0xECD74900,0xC03B1789,0xB2FBA565,0x725E2C9E);
 145 $k_dsbd=0x260;          # decryption sbox output *D*u, *D*t
 146         &data_word(0xE6B1A200,0x7D57CCDF,0x882A4439,0xF56E9B13);
 147         &data_word(0x24C6CB00,0x3CE2FAF7,0x15DEEFD3,0x2931180D);
 148 $k_dsbb=0x280;          # decryption sbox output *B*u, *B*t
 149         &data_word(0x96B44200,0xD0226492,0xB0F2D404,0x602646F6);
 150         &data_word(0xCD596700,0xC19498A6,0x3255AA6B,0xF3FF0C3E);
 151 $k_dsbe=0x2a0;          # decryption sbox output *E*u, *E*t
 152         &data_word(0x26D4D000,0x46F29296,0x64B4F6B0,0x22426004);
 153         &data_word(0xFFAAC100,0x0C55A6CD,0x98593E32,0x9467F36B);
 154 $k_dsbo=0x2c0;          # decryption sbox final output
 155         &data_word(0x7EF94000,0x1387EA53,0xD4943E2D,0xC7AA6DB9);
 156         &data_word(0x93441D00,0x12D7560F,0xD8C58E9C,0xCA4B8159);
 157 &asciz  ("Vector Permutation AES for x86/SSSE3, Mike Hamburg (Stanford University)");
 158 &align  (64);
 159
 160 &function_begin_B("_vpaes_preheat");
 161         &add    ($const,&DWP(0,"esp"));
 162         &movdqa ("xmm7",&QWP($k_inv,$const));
 163         &movdqa ("xmm6",&QWP($k_s0F,$const));
 164         &ret    ();
 165 &function_end_B("_vpaes_preheat");
 166
 167 ##
 168 ##  _aes_encrypt_core
 169 ##
 170 ##  AES-encrypt %xmm0.
 171 ##
 172 ##  Inputs:
 173 ##     %xmm0 = input
 174 ##     %xmm6-%xmm7 as in _vpaes_preheat
 175 ##    (%edx) = scheduled keys
 176 ##
 177 ##  Output in %xmm0
 178 ##  Clobbers  %xmm1-%xmm5, %eax, %ebx, %ecx, %edx
 179 ##
 180 ##
 181 &function_begin_B("_vpaes_encrypt_core");
 182         &mov    ($magic,16);
 183         &mov    ($round,&DWP(240,$key));
 184         &movdqa ("xmm1","xmm6")
 185         &movdqa ("xmm2",&QWP($k_ipt,$const));
 186         &pandn  ("xmm1","xmm0");
 187         &pand   ("xmm0","xmm6");
 188         &movdqu ("xmm5",&QWP(0,$key));
 189         &pshufb ("xmm2","xmm0");
 190         &movdqa ("xmm0",&QWP($k_ipt+16,$const));
 191         &pxor   ("xmm2","xmm5");
 192         &psrld  ("xmm1",4);
 193         &add    ($key,16);
 194         &pshufb ("xmm0","xmm1");
 195         &lea    ($base,&DWP($k_mc_backward,$const));
 196         &pxor   ("xmm0","xmm2");
 197         &jmp    (&label("enc_entry"));
 198
 199
 200 &set_label("enc_loop",16);
 201         # middle of middle round
 202         &movdqa ("xmm4",&QWP($k_sb1,$const));   # 4 : sb1u
 203         &movdqa ("xmm0",&QWP($k_sb1+16,$const));# 0 : sb1t
 204         &pshufb ("xmm4","xmm2");                # 4 = sb1u
 205         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 206         &pxor   ("xmm4","xmm5");                # 4 = sb1u + k
 207         &movdqa ("xmm5",&QWP($k_sb2,$const));   # 4 : sb2u
 208         &pxor   ("xmm0","xmm4");                # 0 = A
 209         &movdqa ("xmm1",&QWP(-0x40,$base,$magic));# .Lk_mc_forward[]
 210         &pshufb ("xmm5","xmm2");                # 4 = sb2u
 211         &movdqa ("xmm2",&QWP($k_sb2+16,$const));# 2 : sb2t
 212         &movdqa ("xmm4",&QWP(0,$base,$magic));  # .Lk_mc_backward[]
 213         &pshufb ("xmm2","xmm3");                # 2 = sb2t
 214         &movdqa ("xmm3","xmm0");                # 3 = A
 215         &pxor   ("xmm2","xmm5");                # 2 = 2A
 216         &pshufb ("xmm0","xmm1");                # 0 = B
 217         &add    ($key,16);                      # next key
 218         &pxor   ("xmm0","xmm2");                # 0 = 2A+B
 219         &pshufb ("xmm3","xmm4");                # 3 = D
 220         &add    ($magic,16);                    # next mc
 221         &pxor   ("xmm3","xmm0");                # 3 = 2A+B+D
 222         &pshufb ("xmm0","xmm1");                # 0 = 2B+C
 223         &and    ($magic,0x30);                  # ... mod 4
 224         &sub    ($round,1);                     # nr--
 225         &pxor   ("xmm0","xmm3");                # 0 = 2A+3B+C+D
 226
 227 &set_label("enc_entry");
 228         # top of round
 229         &movdqa ("xmm1","xmm6");                # 1 : i
 230         &movdqa ("xmm5",&QWP($k_inv+16,$const));# 2 : a/k
 231         &pandn  ("xmm1","xmm0");                # 1 = i<<4
 232         &psrld  ("xmm1",4);                     # 1 = i
 233         &pand   ("xmm0","xmm6");                # 0 = k
 234         &pshufb ("xmm5","xmm0");                # 2 = a/k
 235         &movdqa ("xmm3","xmm7");                # 3 : 1/i
 236         &pxor   ("xmm0","xmm1");                # 0 = j
 237         &pshufb ("xmm3","xmm1");                # 3 = 1/i
 238         &movdqa ("xmm4","xmm7");                # 4 : 1/j
 239         &pxor   ("xmm3","xmm5");                # 3 = iak = 1/i + a/k
 240         &pshufb ("xmm4","xmm0");                # 4 = 1/j
 241         &movdqa ("xmm2","xmm7");                # 2 : 1/iak
 242         &pxor   ("xmm4","xmm5");                # 4 = jak = 1/j + a/k
 243         &pshufb ("xmm2","xmm3");                # 2 = 1/iak
 244         &movdqa ("xmm3","xmm7");                # 3 : 1/jak
 245         &pxor   ("xmm2","xmm0");                # 2 = io
 246         &pshufb ("xmm3","xmm4");                # 3 = 1/jak
 247         &movdqu ("xmm5",&QWP(0,$key));
 248         &pxor   ("xmm3","xmm1");                # 3 = jo
 249         &jnz    (&label("enc_loop"));
 250
 251         # middle of last round
 252         &movdqa ("xmm4",&QWP($k_sbo,$const));   # 3 : sbou      .Lk_sbo
 253         &movdqa ("xmm0",&QWP($k_sbo+16,$const));# 3 : sbot      .Lk_sbo+16
 254         &pshufb ("xmm4","xmm2");                # 4 = sbou
 255         &pxor   ("xmm4","xmm5");                # 4 = sb1u + k
 256         &pshufb ("xmm0","xmm3");                # 0 = sb1t
 257         &movdqa ("xmm1",&QWP(0x40,$base,$magic));# .Lk_sr[]
 258         &pxor   ("xmm0","xmm4");                # 0 = A
 259         &pshufb ("xmm0","xmm1");
 260         &ret    ();
 261 &function_end_B("_vpaes_encrypt_core");
 262
 263 ##
 264 ##  Decryption core
 265 ##
 266 ##  Same API as encryption core.
 267 ##
 268 &function_begin_B("_vpaes_decrypt_core");
 269         &lea    ($base,&DWP($k_dsbd,$const));
 270         &mov    ($round,&DWP(240,$key));
 271         &movdqa ("xmm1","xmm6");
 272         &movdqa ("xmm2",&QWP($k_dipt-$k_dsbd,$base));
 273         &pandn  ("xmm1","xmm0");
 274         &mov    ($magic,$round);
 275         &psrld  ("xmm1",4)
 276         &movdqu ("xmm5",&QWP(0,$key));
 277         &shl    ($magic,4);
 278         &pand   ("xmm0","xmm6");
 279         &pshufb ("xmm2","xmm0");
 280         &movdqa ("xmm0",&QWP($k_dipt-$k_dsbd+16,$base));
 281         &xor    ($magic,0x30);
 282         &pshufb ("xmm0","xmm1");
 283         &and    ($magic,0x30);
 284         &pxor   ("xmm2","xmm5");
 285         &movdqa ("xmm5",&QWP($k_mc_forward+48,$const));
 286         &pxor   ("xmm0","xmm2");
 287         &add    ($key,16);
 288         &lea    ($magic,&DWP($k_sr-$k_dsbd,$base,$magic));
 289         &jmp    (&label("dec_entry"));
 290
 291 &set_label("dec_loop",16);
 292 ##
 293 ##  Inverse mix columns
 294 ##
 295         &movdqa ("xmm4",&QWP(-0x20,$base));     # 4 : sb9u
 296         &movdqa ("xmm1",&QWP(-0x10,$base));     # 0 : sb9t
 297         &pshufb ("xmm4","xmm2");                # 4 = sb9u
 298         &pshufb ("xmm1","xmm3");                # 0 = sb9t
 299         &pxor   ("xmm0","xmm4");
 300         &movdqa ("xmm4",&QWP(0,$base));         # 4 : sbdu
 301         &pxor   ("xmm0","xmm1");                # 0 = ch
 302         &movdqa ("xmm1",&QWP(0x10,$base));      # 0 : sbdt
 303
 304         &pshufb ("xmm4","xmm2");                # 4 = sbdu
 305         &pshufb ("xmm0","xmm5");                # MC ch
 306         &pshufb ("xmm1","xmm3");                # 0 = sbdt
 307         &pxor   ("xmm0","xmm4");                # 4 = ch
 308         &movdqa ("xmm4",&QWP(0x20,$base));      # 4 : sbbu
 309         &pxor   ("xmm0","xmm1");                # 0 = ch
 310         &movdqa ("xmm1",&QWP(0x30,$base));      # 0 : sbbt
 311
 312         &pshufb ("xmm4","xmm2");                # 4 = sbbu
 313         &pshufb ("xmm0","xmm5");                # MC ch
 314         &pshufb ("xmm1","xmm3");                # 0 = sbbt
 315         &pxor   ("xmm0","xmm4");                # 4 = ch
 316         &movdqa ("xmm4",&QWP(0x40,$base));      # 4 : sbeu
 317         &pxor   ("xmm0","xmm1");                # 0 = ch
 318         &movdqa ("xmm1",&QWP(0x50,$base));      # 0 : sbet
 319
 320         &pshufb ("xmm4","xmm2");                # 4 = sbeu
 321         &pshufb ("xmm0","xmm5");                # MC ch
 322         &pshufb ("xmm1","xmm3");                # 0 = sbet
 323         &pxor   ("xmm0","xmm4");                # 4 = ch
 324         &add    ($key,16);                      # next round key
 325         &palignr("xmm5","xmm5",12);
 326         &pxor   ("xmm0","xmm1");                # 0 = ch
 327         &sub    ($round,1);                     # nr--
 328
 329 &set_label("dec_entry");
 330         # top of round
 331         &movdqa ("xmm1","xmm6");                # 1 : i
 332         &movdqa ("xmm2",&QWP($k_inv+16,$const));# 2 : a/k
 333         &pandn  ("xmm1","xmm0");                # 1 = i<<4
 334         &pand   ("xmm0","xmm6");                # 0 = k
 335         &psrld  ("xmm1",4);                     # 1 = i
 336         &pshufb ("xmm2","xmm0");                # 2 = a/k
 337         &movdqa ("xmm3","xmm7");                # 3 : 1/i
 338         &pxor   ("xmm0","xmm1");                # 0 = j
 339         &pshufb ("xmm3","xmm1");                # 3 = 1/i
 340         &movdqa ("xmm4","xmm7");                # 4 : 1/j
 341         &pxor   ("xmm3","xmm2");                # 3 = iak = 1/i + a/k
 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         &movdqa ("xmm3","xmm7");                # 3 : 1/jak
 347         &pxor   ("xmm2","xmm0");                # 2 = io
 348         &pshufb ("xmm3","xmm4");                # 3 = 1/jak
 349         &movdqu ("xmm0",&QWP(0,$key));
 350         &pxor   ("xmm3","xmm1");                # 3 = jo
 351         &jnz    (&label("dec_loop"));
 352
 353         # middle of last round
 354         &movdqa ("xmm4",&QWP(0x60,$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 ("xmm1","xmm6",0x80);           # d c 0 0 -> c 0 0 0
 546         &pshufd ("xmm0","xmm7",0xFE);           # b a _ _ -> b b b a
 547         &pxor   ("xmm6","xmm1");                # -> c+d c 0 0
 548         &pxor   ("xmm1","xmm1");
 549         &pxor   ("xmm6","xmm0");                # -> b+c+d b+c b a
 550         &movdqa ("xmm0","xmm6");
 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();