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   1 /*
   2  *
   3  * Glue Code for optimized 586 assembler version of AES
   4  *
   5  * Copyright (c) 2002, Dr Brian Gladman <>, Worcester, UK.
   6  * All rights reserved.
   7  *
   8  * LICENSE TERMS
   9  *
  10  * The free distribution and use of this software in both source and binary
  11  * form is allowed (with or without changes) provided that:
  12  *
  13  *   1. distributions of this source code include the above copyright
  14  *      notice, this list of conditions and the following disclaimer;
  15  *
  16  *   2. distributions in binary form include the above copyright
  17  *      notice, this list of conditions and the following disclaimer
  18  *      in the documentation and/or other associated materials;
  19  *
  20  *   3. the copyright holder's name is not used to endorse products
  21  *      built using this software without specific written permission.
  22  *
  23  * ALTERNATIVELY, provided that this notice is retained in full, this product
  24  * may be distributed under the terms of the GNU General Public License (GPL),
  25  * in which case the provisions of the GPL apply INSTEAD OF those given above.
  26  *
  27  * DISCLAIMER
  28  *
  29  * This software is provided 'as is' with no explicit or implied warranties
  30  * in respect of its properties, including, but not limited to, correctness
  31  * and/or fitness for purpose.
  32  *
  33  * Copyright (c) 2003, Adam J. Richter <adam@yggdrasil.com> (conversion to
  34  * 2.5 API).
  35  * Copyright (c) 2003, 2004 Fruhwirth Clemens <clemens@endorphin.org>
  36  * Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
  37  *
  38  */
  39
  40 #include <asm/byteorder.h>
  41 #include <linux/kernel.h>
  42 #include <linux/module.h>
  43 #include <linux/init.h>
  44 #include <linux/types.h>
  45 #include <linux/crypto.h>
  46 #include <linux/linkage.h>
  47
  48 asmlinkage void aes_enc_blk(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
  49 asmlinkage void aes_dec_blk(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
  50
  51 #define AES_MIN_KEY_SIZE        16
  52 #define AES_MAX_KEY_SIZE        32
  53 #define AES_BLOCK_SIZE          16
  54 #define AES_KS_LENGTH           4 * AES_BLOCK_SIZE
  55 #define RC_LENGTH               29
  56
  57 struct aes_ctx {
  58         u32 ekey[AES_KS_LENGTH];
  59         u32 rounds;
  60         u32 dkey[AES_KS_LENGTH];
  61 };
  62
  63 #define WPOLY 0x011b
  64 #define bytes2word(b0, b1, b2, b3)  \
  65         (((u32)(b3) << 24) | ((u32)(b2) << 16) | ((u32)(b1) << 8) | (b0))
  66
  67 /* define the finite field multiplies required for Rijndael */
  68 #define f2(x) ((x) ? pow[log[x] + 0x19] : 0)
  69 #define f3(x) ((x) ? pow[log[x] + 0x01] : 0)
  70 #define f9(x) ((x) ? pow[log[x] + 0xc7] : 0)
  71 #define fb(x) ((x) ? pow[log[x] + 0x68] : 0)
  72 #define fd(x) ((x) ? pow[log[x] + 0xee] : 0)
  73 #define fe(x) ((x) ? pow[log[x] + 0xdf] : 0)
  74 #define fi(x) ((x) ?   pow[255 - log[x]]: 0)
  75
  76 static inline u32 upr(u32 x, int n)
  77 {
  78         return (x << 8 * n) | (x >> (32 - 8 * n));
  79 }
  80
  81 static inline u8 bval(u32 x, int n)
  82 {
  83         return x >> 8 * n;
  84 }
  85
  86 /* The forward and inverse affine transformations used in the S-box */
  87 #define fwd_affine(x) \
  88         (w = (u32)x, w ^= (w<<1)^(w<<2)^(w<<3)^(w<<4), 0x63^(u8)(w^(w>>8)))
  89
  90 #define inv_affine(x) \
  91         (w = (u32)x, w = (w<<1)^(w<<3)^(w<<6), 0x05^(u8)(w^(w>>8)))
  92
  93 static u32 rcon_tab[RC_LENGTH];
  94
  95 u32 ft_tab[4][256];
  96 u32 fl_tab[4][256];
  97 static u32 im_tab[4][256];
  98 u32 il_tab[4][256];
  99 u32 it_tab[4][256];
 100
 101 static void gen_tabs(void)
 102 {
 103         u32 i, w;
 104         u8 pow[512], log[256];
 105
 106         /*
 107          * log and power tables for GF(2^8) finite field with
 108          * WPOLY as modular polynomial - the simplest primitive
 109          * root is 0x03, used here to generate the tables.
 110          */
 111         i = 0; w = 1;
 112
 113         do {
 114                 pow[i] = (u8)w;
 115                 pow[i + 255] = (u8)w;
 116                 log[w] = (u8)i++;
 117                 w ^=  (w << 1) ^ (w & 0x80 ? WPOLY : 0);
 118         } while (w != 1);
 119
 120         for(i = 0, w = 1; i < RC_LENGTH; ++i) {
 121                 rcon_tab[i] = bytes2word(w, 0, 0, 0);
 122                 w = f2(w);
 123         }
 124
 125         for(i = 0; i < 256; ++i) {
 126                 u8 b;
 127
 128                 b = fwd_affine(fi((u8)i));
 129                 w = bytes2word(f2(b), b, b, f3(b));
 130
 131                 /* tables for a normal encryption round */
 132                 ft_tab[0][i] = w;
 133                 ft_tab[1][i] = upr(w, 1);
 134                 ft_tab[2][i] = upr(w, 2);
 135                 ft_tab[3][i] = upr(w, 3);
 136                 w = bytes2word(b, 0, 0, 0);
 137
 138                 /*
 139                  * tables for last encryption round
 140                  * (may also be used in the key schedule)
 141                  */
 142                 fl_tab[0][i] = w;
 143                 fl_tab[1][i] = upr(w, 1);
 144                 fl_tab[2][i] = upr(w, 2);
 145                 fl_tab[3][i] = upr(w, 3);
 146
 147                 b = fi(inv_affine((u8)i));
 148                 w = bytes2word(fe(b), f9(b), fd(b), fb(b));
 149
 150                 /* tables for the inverse mix column operation  */
 151                 im_tab[0][b] = w;
 152                 im_tab[1][b] = upr(w, 1);
 153                 im_tab[2][b] = upr(w, 2);
 154                 im_tab[3][b] = upr(w, 3);
 155
 156                 /* tables for a normal decryption round */
 157                 it_tab[0][i] = w;
 158                 it_tab[1][i] = upr(w,1);
 159                 it_tab[2][i] = upr(w,2);
 160                 it_tab[3][i] = upr(w,3);
 161
 162                 w = bytes2word(b, 0, 0, 0);
 163
 164                 /* tables for last decryption round */
 165                 il_tab[0][i] = w;
 166                 il_tab[1][i] = upr(w,1);
 167                 il_tab[2][i] = upr(w,2);
 168                 il_tab[3][i] = upr(w,3);
 169     }
 170 }
 171
 172 #define four_tables(x,tab,vf,rf,c)              \
 173 (       tab[0][bval(vf(x,0,c),rf(0,c))] ^       \
 174         tab[1][bval(vf(x,1,c),rf(1,c))] ^       \
 175         tab[2][bval(vf(x,2,c),rf(2,c))] ^       \
 176         tab[3][bval(vf(x,3,c),rf(3,c))]         \
 177 )
 178
 179 #define vf1(x,r,c)  (x)
 180 #define rf1(r,c)    (r)
 181 #define rf2(r,c)    ((r-c)&3)
 182
 183 #define inv_mcol(x) four_tables(x,im_tab,vf1,rf1,0)
 184 #define ls_box(x,c) four_tables(x,fl_tab,vf1,rf2,c)
 185
 186 #define ff(x) inv_mcol(x)
 187
 188 #define ke4(k,i)                                                        \
 189 {                                                                       \
 190         k[4*(i)+4] = ss[0] ^= ls_box(ss[3],3) ^ rcon_tab[i];            \
 191         k[4*(i)+5] = ss[1] ^= ss[0];                                    \
 192         k[4*(i)+6] = ss[2] ^= ss[1];                                    \
 193         k[4*(i)+7] = ss[3] ^= ss[2];                                    \
 194 }
 195
 196 #define kel4(k,i)                                                       \
 197 {                                                                       \
 198         k[4*(i)+4] = ss[0] ^= ls_box(ss[3],3) ^ rcon_tab[i];            \
 199         k[4*(i)+5] = ss[1] ^= ss[0];                                    \
 200         k[4*(i)+6] = ss[2] ^= ss[1]; k[4*(i)+7] = ss[3] ^= ss[2];       \
 201 }
 202
 203 #define ke6(k,i)                                                        \
 204 {                                                                       \
 205         k[6*(i)+ 6] = ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];           \
 206         k[6*(i)+ 7] = ss[1] ^= ss[0];                                   \
 207         k[6*(i)+ 8] = ss[2] ^= ss[1];                                   \
 208         k[6*(i)+ 9] = ss[3] ^= ss[2];                                   \
 209         k[6*(i)+10] = ss[4] ^= ss[3];                                   \
 210         k[6*(i)+11] = ss[5] ^= ss[4];                                   \
 211 }
 212
 213 #define kel6(k,i)                                                       \
 214 {                                                                       \
 215         k[6*(i)+ 6] = ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];           \
 216         k[6*(i)+ 7] = ss[1] ^= ss[0];                                   \
 217         k[6*(i)+ 8] = ss[2] ^= ss[1];                                   \
 218         k[6*(i)+ 9] = ss[3] ^= ss[2];                                   \
 219 }
 220
 221 #define ke8(k,i)                                                        \
 222 {                                                                       \
 223         k[8*(i)+ 8] = ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];           \
 224         k[8*(i)+ 9] = ss[1] ^= ss[0];                                   \
 225         k[8*(i)+10] = ss[2] ^= ss[1];                                   \
 226         k[8*(i)+11] = ss[3] ^= ss[2];                                   \
 227         k[8*(i)+12] = ss[4] ^= ls_box(ss[3],0);                         \
 228         k[8*(i)+13] = ss[5] ^= ss[4];                                   \
 229         k[8*(i)+14] = ss[6] ^= ss[5];                                   \
 230         k[8*(i)+15] = ss[7] ^= ss[6];                                   \
 231 }
 232
 233 #define kel8(k,i)                                                       \
 234 {                                                                       \
 235         k[8*(i)+ 8] = ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];           \
 236         k[8*(i)+ 9] = ss[1] ^= ss[0];                                   \
 237         k[8*(i)+10] = ss[2] ^= ss[1];                                   \
 238         k[8*(i)+11] = ss[3] ^= ss[2];                                   \
 239 }
 240
 241 #define kdf4(k,i)                                                       \
 242 {                                                                       \
 243         ss[0] = ss[0] ^ ss[2] ^ ss[1] ^ ss[3];                          \
 244         ss[1] = ss[1] ^ ss[3];                                          \
 245         ss[2] = ss[2] ^ ss[3];                                          \
 246         ss[3] = ss[3];                                                  \
 247         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 248         ss[i % 4] ^= ss[4];                                             \
 249         ss[4] ^= k[4*(i)];                                              \
 250         k[4*(i)+4] = ff(ss[4]);                                         \
 251         ss[4] ^= k[4*(i)+1];                                            \
 252         k[4*(i)+5] = ff(ss[4]);                                         \
 253         ss[4] ^= k[4*(i)+2];                                            \
 254         k[4*(i)+6] = ff(ss[4]);                                         \
 255         ss[4] ^= k[4*(i)+3];                                            \
 256         k[4*(i)+7] = ff(ss[4]);                                         \
 257 }
 258
 259 #define kd4(k,i)                                                        \
 260 {                                                                       \
 261         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 262         ss[i % 4] ^= ss[4];                                             \
 263         ss[4] = ff(ss[4]);                                              \
 264         k[4*(i)+4] = ss[4] ^= k[4*(i)];                                 \
 265         k[4*(i)+5] = ss[4] ^= k[4*(i)+1];                               \
 266         k[4*(i)+6] = ss[4] ^= k[4*(i)+2];                               \
 267         k[4*(i)+7] = ss[4] ^= k[4*(i)+3];                               \
 268 }
 269
 270 #define kdl4(k,i)                                                       \
 271 {                                                                       \
 272         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 273         ss[i % 4] ^= ss[4];                                             \
 274         k[4*(i)+4] = (ss[0] ^= ss[1]) ^ ss[2] ^ ss[3];                  \
 275         k[4*(i)+5] = ss[1] ^ ss[3];                                     \
 276         k[4*(i)+6] = ss[0];                                             \
 277         k[4*(i)+7] = ss[1];                                             \
 278 }
 279
 280 #define kdf6(k,i)                                                       \
 281 {                                                                       \
 282         ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];                         \
 283         k[6*(i)+ 6] = ff(ss[0]);                                        \
 284         ss[1] ^= ss[0];                                                 \
 285         k[6*(i)+ 7] = ff(ss[1]);                                        \
 286         ss[2] ^= ss[1];                                                 \
 287         k[6*(i)+ 8] = ff(ss[2]);                                        \
 288         ss[3] ^= ss[2];                                                 \
 289         k[6*(i)+ 9] = ff(ss[3]);                                        \
 290         ss[4] ^= ss[3];                                                 \
 291         k[6*(i)+10] = ff(ss[4]);                                        \
 292         ss[5] ^= ss[4];                                                 \
 293         k[6*(i)+11] = ff(ss[5]);                                        \
 294 }
 295
 296 #define kd6(k,i)                                                        \
 297 {                                                                       \
 298         ss[6] = ls_box(ss[5],3) ^ rcon_tab[i];                          \
 299         ss[0] ^= ss[6]; ss[6] = ff(ss[6]);                              \
 300         k[6*(i)+ 6] = ss[6] ^= k[6*(i)];                                \
 301         ss[1] ^= ss[0];                                                 \
 302         k[6*(i)+ 7] = ss[6] ^= k[6*(i)+ 1];                             \
 303         ss[2] ^= ss[1];                                                 \
 304         k[6*(i)+ 8] = ss[6] ^= k[6*(i)+ 2];                             \
 305         ss[3] ^= ss[2];                                                 \
 306         k[6*(i)+ 9] = ss[6] ^= k[6*(i)+ 3];                             \
 307         ss[4] ^= ss[3];                                                 \
 308         k[6*(i)+10] = ss[6] ^= k[6*(i)+ 4];                             \
 309         ss[5] ^= ss[4];                                                 \
 310         k[6*(i)+11] = ss[6] ^= k[6*(i)+ 5];                             \
 311 }
 312
 313 #define kdl6(k,i)                                                       \
 314 {                                                                       \
 315         ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];                         \
 316         k[6*(i)+ 6] = ss[0];                                            \
 317         ss[1] ^= ss[0];                                                 \
 318         k[6*(i)+ 7] = ss[1];                                            \
 319         ss[2] ^= ss[1];                                                 \
 320         k[6*(i)+ 8] = ss[2];                                            \
 321         ss[3] ^= ss[2];                                                 \
 322         k[6*(i)+ 9] = ss[3];                                            \
 323 }
 324
 325 #define kdf8(k,i)                                                       \
 326 {                                                                       \
 327         ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];                         \
 328         k[8*(i)+ 8] = ff(ss[0]);                                        \
 329         ss[1] ^= ss[0];                                                 \
 330         k[8*(i)+ 9] = ff(ss[1]);                                        \
 331         ss[2] ^= ss[1];                                                 \
 332         k[8*(i)+10] = ff(ss[2]);                                        \
 333         ss[3] ^= ss[2];                                                 \
 334         k[8*(i)+11] = ff(ss[3]);                                        \
 335         ss[4] ^= ls_box(ss[3],0);                                       \
 336         k[8*(i)+12] = ff(ss[4]);                                        \
 337         ss[5] ^= ss[4];                                                 \
 338         k[8*(i)+13] = ff(ss[5]);                                        \
 339         ss[6] ^= ss[5];                                                 \
 340         k[8*(i)+14] = ff(ss[6]);                                        \
 341         ss[7] ^= ss[6];                                                 \
 342         k[8*(i)+15] = ff(ss[7]);                                        \
 343 }
 344
 345 #define kd8(k,i)                                                        \
 346 {                                                                       \
 347         u32 __g = ls_box(ss[7],3) ^ rcon_tab[i];                        \
 348         ss[0] ^= __g;                                                   \
 349         __g = ff(__g);                                                  \
 350         k[8*(i)+ 8] = __g ^= k[8*(i)];                                  \
 351         ss[1] ^= ss[0];                                                 \
 352         k[8*(i)+ 9] = __g ^= k[8*(i)+ 1];                               \
 353         ss[2] ^= ss[1];                                                 \
 354         k[8*(i)+10] = __g ^= k[8*(i)+ 2];                               \
 355         ss[3] ^= ss[2];                                                 \
 356         k[8*(i)+11] = __g ^= k[8*(i)+ 3];                               \
 357         __g = ls_box(ss[3],0);                                          \
 358         ss[4] ^= __g;                                                   \
 359         __g = ff(__g);                                                  \
 360         k[8*(i)+12] = __g ^= k[8*(i)+ 4];                               \
 361         ss[5] ^= ss[4];                                                 \
 362         k[8*(i)+13] = __g ^= k[8*(i)+ 5];                               \
 363         ss[6] ^= ss[5];                                                 \
 364         k[8*(i)+14] = __g ^= k[8*(i)+ 6];                               \
 365         ss[7] ^= ss[6];                                                 \
 366         k[8*(i)+15] = __g ^= k[8*(i)+ 7];                               \
 367 }
 368
 369 #define kdl8(k,i)                                                       \
 370 {                                                                       \
 371         ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];                         \
 372         k[8*(i)+ 8] = ss[0];                                            \
 373         ss[1] ^= ss[0];                                                 \
 374         k[8*(i)+ 9] = ss[1];                                            \
 375         ss[2] ^= ss[1];                                                 \
 376         k[8*(i)+10] = ss[2];                                            \
 377         ss[3] ^= ss[2];                                                 \
 378         k[8*(i)+11] = ss[3];                                            \
 379 }
 380
 381 static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 382                        unsigned int key_len)
 383 {
 384         int i;
 385         u32 ss[8];
 386         struct aes_ctx *ctx = crypto_tfm_ctx(tfm);
 387         const __le32 *key = (const __le32 *)in_key;
 388         u32 *flags = &tfm->crt_flags;
 389
 390         /* encryption schedule */
 391
 392         ctx->ekey[0] = ss[0] = le32_to_cpu(key[0]);
 393         ctx->ekey[1] = ss[1] = le32_to_cpu(key[1]);
 394         ctx->ekey[2] = ss[2] = le32_to_cpu(key[2]);
 395         ctx->ekey[3] = ss[3] = le32_to_cpu(key[3]);
 396
 397         switch(key_len) {
 398         case 16:
 399                 for (i = 0; i < 9; i++)
 400                         ke4(ctx->ekey, i);
 401                 kel4(ctx->ekey, 9);
 402                 ctx->rounds = 10;
 403                 break;
 404
 405         case 24:
 406                 ctx->ekey[4] = ss[4] = le32_to_cpu(key[4]);
 407                 ctx->ekey[5] = ss[5] = le32_to_cpu(key[5]);
 408                 for (i = 0; i < 7; i++)
 409                         ke6(ctx->ekey, i);
 410                 kel6(ctx->ekey, 7);
 411                 ctx->rounds = 12;
 412                 break;
 413
 414         case 32:
 415                 ctx->ekey[4] = ss[4] = le32_to_cpu(key[4]);
 416                 ctx->ekey[5] = ss[5] = le32_to_cpu(key[5]);
 417                 ctx->ekey[6] = ss[6] = le32_to_cpu(key[6]);
 418                 ctx->ekey[7] = ss[7] = le32_to_cpu(key[7]);
 419                 for (i = 0; i < 6; i++)
 420                         ke8(ctx->ekey, i);
 421                 kel8(ctx->ekey, 6);
 422                 ctx->rounds = 14;
 423                 break;
 424
 425         default:
 426                 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 427                 return -EINVAL;
 428         }
 429
 430         /* decryption schedule */
 431
 432         ctx->dkey[0] = ss[0] = le32_to_cpu(key[0]);
 433         ctx->dkey[1] = ss[1] = le32_to_cpu(key[1]);
 434         ctx->dkey[2] = ss[2] = le32_to_cpu(key[2]);
 435         ctx->dkey[3] = ss[3] = le32_to_cpu(key[3]);
 436
 437         switch (key_len) {
 438         case 16:
 439                 kdf4(ctx->dkey, 0);
 440                 for (i = 1; i < 9; i++)
 441                         kd4(ctx->dkey, i);
 442                 kdl4(ctx->dkey, 9);
 443                 break;
 444
 445         case 24:
 446                 ctx->dkey[4] = ff(ss[4] = le32_to_cpu(key[4]));
 447                 ctx->dkey[5] = ff(ss[5] = le32_to_cpu(key[5]));
 448                 kdf6(ctx->dkey, 0);
 449                 for (i = 1; i < 7; i++)
 450                         kd6(ctx->dkey, i);
 451                 kdl6(ctx->dkey, 7);
 452                 break;
 453
 454         case 32:
 455                 ctx->dkey[4] = ff(ss[4] = le32_to_cpu(key[4]));
 456                 ctx->dkey[5] = ff(ss[5] = le32_to_cpu(key[5]));
 457                 ctx->dkey[6] = ff(ss[6] = le32_to_cpu(key[6]));
 458                 ctx->dkey[7] = ff(ss[7] = le32_to_cpu(key[7]));
 459                 kdf8(ctx->dkey, 0);
 460                 for (i = 1; i < 6; i++)
 461                         kd8(ctx->dkey, i);
 462                 kdl8(ctx->dkey, 6);
 463                 break;
 464         }
 465         return 0;
 466 }
 467
 468 static void aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 469 {
 470         aes_enc_blk(tfm, dst, src);
 471 }
 472
 473 static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 474 {
 475         aes_dec_blk(tfm, dst, src);
 476 }
 477
 478 static struct crypto_alg aes_alg = {
 479         .cra_name               =       "aes",
 480         .cra_driver_name        =       "aes-i586",
 481         .cra_priority           =       200,
 482         .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
 483         .cra_blocksize          =       AES_BLOCK_SIZE,
 484         .cra_ctxsize            =       sizeof(struct aes_ctx),
 485         .cra_module             =       THIS_MODULE,
 486         .cra_list               =       LIST_HEAD_INIT(aes_alg.cra_list),
 487         .cra_u                  =       {
 488                 .cipher = {
 489                         .cia_min_keysize        =       AES_MIN_KEY_SIZE,
 490                         .cia_max_keysize        =       AES_MAX_KEY_SIZE,
 491                         .cia_setkey             =       aes_set_key,
 492                         .cia_encrypt            =       aes_encrypt,
 493                         .cia_decrypt            =       aes_decrypt
 494                 }
 495         }
 496 };
 497
 498 static int __init aes_init(void)
 499 {
 500         gen_tabs();
 501         return crypto_register_alg(&aes_alg);
 502 }
 503
 504 static void __exit aes_fini(void)
 505 {
 506         crypto_unregister_alg(&aes_alg);
 507 }
 508
 509 module_init(aes_init);
 510 module_exit(aes_fini);
 511
 512 MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, i586 asm optimized");
 513 MODULE_LICENSE("Dual BSD/GPL");
 514 MODULE_AUTHOR("Fruhwirth Clemens, James Morris, Brian Gladman, Adam Richter");
 515 MODULE_ALIAS("aes");