arch/i386/crypto/aes.c

   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(const u8 *src, u8 *dst, void *ctx);
  49 asmlinkage void aes_dec_blk(const u8 *src, u8 *dst, void *ctx);
  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 ls_tab[4][256];
  98 static u32 im_tab[4][256];
  99 u32 il_tab[4][256];
 100 u32 it_tab[4][256];
 101
 102 static void gen_tabs(void)
 103 {
 104         u32 i, w;
 105         u8 pow[512], log[256];
 106
 107         /*
 108          * log and power tables for GF(2^8) finite field with
 109          * WPOLY as modular polynomial - the simplest primitive
 110          * root is 0x03, used here to generate the tables.
 111          */
 112         i = 0; w = 1;
 113
 114         do {
 115                 pow[i] = (u8)w;
 116                 pow[i + 255] = (u8)w;
 117                 log[w] = (u8)i++;
 118                 w ^=  (w << 1) ^ (w & 0x80 ? WPOLY : 0);
 119         } while (w != 1);
 120
 121         for(i = 0, w = 1; i < RC_LENGTH; ++i) {
 122                 rcon_tab[i] = bytes2word(w, 0, 0, 0);
 123                 w = f2(w);
 124         }
 125
 126         for(i = 0; i < 256; ++i) {
 127                 u8 b;
 128
 129                 b = fwd_affine(fi((u8)i));
 130                 w = bytes2word(f2(b), b, b, f3(b));
 131
 132                 /* tables for a normal encryption round */
 133                 ft_tab[0][i] = w;
 134                 ft_tab[1][i] = upr(w, 1);
 135                 ft_tab[2][i] = upr(w, 2);
 136                 ft_tab[3][i] = upr(w, 3);
 137                 w = bytes2word(b, 0, 0, 0);
 138
 139                 /*
 140                  * tables for last encryption round
 141                  * (may also be used in the key schedule)
 142                  */
 143                 fl_tab[0][i] = w;
 144                 fl_tab[1][i] = upr(w, 1);
 145                 fl_tab[2][i] = upr(w, 2);
 146                 fl_tab[3][i] = upr(w, 3);
 147
 148                 /*
 149                  * table for key schedule if fl_tab above is
 150                  * not of the required form
 151                  */
 152                 ls_tab[0][i] = w;
 153                 ls_tab[1][i] = upr(w, 1);
 154                 ls_tab[2][i] = upr(w, 2);
 155                 ls_tab[3][i] = upr(w, 3);
 156
 157                 b = fi(inv_affine((u8)i));
 158                 w = bytes2word(fe(b), f9(b), fd(b), fb(b));
 159
 160                 /* tables for the inverse mix column operation  */
 161                 im_tab[0][b] = w;
 162                 im_tab[1][b] = upr(w, 1);
 163                 im_tab[2][b] = upr(w, 2);
 164                 im_tab[3][b] = upr(w, 3);
 165
 166                 /* tables for a normal decryption round */
 167                 it_tab[0][i] = w;
 168                 it_tab[1][i] = upr(w,1);
 169                 it_tab[2][i] = upr(w,2);
 170                 it_tab[3][i] = upr(w,3);
 171
 172                 w = bytes2word(b, 0, 0, 0);
 173
 174                 /* tables for last decryption round */
 175                 il_tab[0][i] = w;
 176                 il_tab[1][i] = upr(w,1);
 177                 il_tab[2][i] = upr(w,2);
 178                 il_tab[3][i] = upr(w,3);
 179     }
 180 }
 181
 182 #define four_tables(x,tab,vf,rf,c)              \
 183 (       tab[0][bval(vf(x,0,c),rf(0,c))] ^       \
 184         tab[1][bval(vf(x,1,c),rf(1,c))] ^       \
 185         tab[2][bval(vf(x,2,c),rf(2,c))] ^       \
 186         tab[3][bval(vf(x,3,c),rf(3,c))]         \
 187 )
 188
 189 #define vf1(x,r,c)  (x)
 190 #define rf1(r,c)    (r)
 191 #define rf2(r,c)    ((r-c)&3)
 192
 193 #define inv_mcol(x) four_tables(x,im_tab,vf1,rf1,0)
 194 #define ls_box(x,c) four_tables(x,fl_tab,vf1,rf2,c)
 195
 196 #define ff(x) inv_mcol(x)
 197
 198 #define ke4(k,i)                                                        \
 199 {                                                                       \
 200         k[4*(i)+4] = ss[0] ^= ls_box(ss[3],3) ^ rcon_tab[i];            \
 201         k[4*(i)+5] = ss[1] ^= ss[0];                                    \
 202         k[4*(i)+6] = ss[2] ^= ss[1];                                    \
 203         k[4*(i)+7] = ss[3] ^= ss[2];                                    \
 204 }
 205
 206 #define kel4(k,i)                                                       \
 207 {                                                                       \
 208         k[4*(i)+4] = ss[0] ^= ls_box(ss[3],3) ^ rcon_tab[i];            \
 209         k[4*(i)+5] = ss[1] ^= ss[0];                                    \
 210         k[4*(i)+6] = ss[2] ^= ss[1]; k[4*(i)+7] = ss[3] ^= ss[2];       \
 211 }
 212
 213 #define ke6(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         k[6*(i)+10] = ss[4] ^= ss[3];                                   \
 220         k[6*(i)+11] = ss[5] ^= ss[4];                                   \
 221 }
 222
 223 #define kel6(k,i)                                                       \
 224 {                                                                       \
 225         k[6*(i)+ 6] = ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];           \
 226         k[6*(i)+ 7] = ss[1] ^= ss[0];                                   \
 227         k[6*(i)+ 8] = ss[2] ^= ss[1];                                   \
 228         k[6*(i)+ 9] = ss[3] ^= ss[2];                                   \
 229 }
 230
 231 #define ke8(k,i)                                                        \
 232 {                                                                       \
 233         k[8*(i)+ 8] = ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];           \
 234         k[8*(i)+ 9] = ss[1] ^= ss[0];                                   \
 235         k[8*(i)+10] = ss[2] ^= ss[1];                                   \
 236         k[8*(i)+11] = ss[3] ^= ss[2];                                   \
 237         k[8*(i)+12] = ss[4] ^= ls_box(ss[3],0);                         \
 238         k[8*(i)+13] = ss[5] ^= ss[4];                                   \
 239         k[8*(i)+14] = ss[6] ^= ss[5];                                   \
 240         k[8*(i)+15] = ss[7] ^= ss[6];                                   \
 241 }
 242
 243 #define kel8(k,i)                                                       \
 244 {                                                                       \
 245         k[8*(i)+ 8] = ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];           \
 246         k[8*(i)+ 9] = ss[1] ^= ss[0];                                   \
 247         k[8*(i)+10] = ss[2] ^= ss[1];                                   \
 248         k[8*(i)+11] = ss[3] ^= ss[2];                                   \
 249 }
 250
 251 #define kdf4(k,i)                                                       \
 252 {                                                                       \
 253         ss[0] = ss[0] ^ ss[2] ^ ss[1] ^ ss[3];                          \
 254         ss[1] = ss[1] ^ ss[3];                                          \
 255         ss[2] = ss[2] ^ ss[3];                                          \
 256         ss[3] = ss[3];                                                  \
 257         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 258         ss[i % 4] ^= ss[4];                                             \
 259         ss[4] ^= k[4*(i)];                                              \
 260         k[4*(i)+4] = ff(ss[4]);                                         \
 261         ss[4] ^= k[4*(i)+1];                                            \
 262         k[4*(i)+5] = ff(ss[4]);                                         \
 263         ss[4] ^= k[4*(i)+2];                                            \
 264         k[4*(i)+6] = ff(ss[4]);                                         \
 265         ss[4] ^= k[4*(i)+3];                                            \
 266         k[4*(i)+7] = ff(ss[4]);                                         \
 267 }
 268
 269 #define kd4(k,i)                                                        \
 270 {                                                                       \
 271         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 272         ss[i % 4] ^= ss[4];                                             \
 273         ss[4] = ff(ss[4]);                                              \
 274         k[4*(i)+4] = ss[4] ^= k[4*(i)];                                 \
 275         k[4*(i)+5] = ss[4] ^= k[4*(i)+1];                               \
 276         k[4*(i)+6] = ss[4] ^= k[4*(i)+2];                               \
 277         k[4*(i)+7] = ss[4] ^= k[4*(i)+3];                               \
 278 }
 279
 280 #define kdl4(k,i)                                                       \
 281 {                                                                       \
 282         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 283         ss[i % 4] ^= ss[4];                                             \
 284         k[4*(i)+4] = (ss[0] ^= ss[1]) ^ ss[2] ^ ss[3];                  \
 285         k[4*(i)+5] = ss[1] ^ ss[3];                                     \
 286         k[4*(i)+6] = ss[0];                                             \
 287         k[4*(i)+7] = ss[1];                                             \
 288 }
 289
 290 #define kdf6(k,i)                                                       \
 291 {                                                                       \
 292         ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];                         \
 293         k[6*(i)+ 6] = ff(ss[0]);                                        \
 294         ss[1] ^= ss[0];                                                 \
 295         k[6*(i)+ 7] = ff(ss[1]);                                        \
 296         ss[2] ^= ss[1];                                                 \
 297         k[6*(i)+ 8] = ff(ss[2]);                                        \
 298         ss[3] ^= ss[2];                                                 \
 299         k[6*(i)+ 9] = ff(ss[3]);                                        \
 300         ss[4] ^= ss[3];                                                 \
 301         k[6*(i)+10] = ff(ss[4]);                                        \
 302         ss[5] ^= ss[4];                                                 \
 303         k[6*(i)+11] = ff(ss[5]);                                        \
 304 }
 305
 306 #define kd6(k,i)                                                        \
 307 {                                                                       \
 308         ss[6] = ls_box(ss[5],3) ^ rcon_tab[i];                          \
 309         ss[0] ^= ss[6]; ss[6] = ff(ss[6]);                              \
 310         k[6*(i)+ 6] = ss[6] ^= k[6*(i)];                                \
 311         ss[1] ^= ss[0];                                                 \
 312         k[6*(i)+ 7] = ss[6] ^= k[6*(i)+ 1];                             \
 313         ss[2] ^= ss[1];                                                 \
 314         k[6*(i)+ 8] = ss[6] ^= k[6*(i)+ 2];                             \
 315         ss[3] ^= ss[2];                                                 \
 316         k[6*(i)+ 9] = ss[6] ^= k[6*(i)+ 3];                             \
 317         ss[4] ^= ss[3];                                                 \
 318         k[6*(i)+10] = ss[6] ^= k[6*(i)+ 4];                             \
 319         ss[5] ^= ss[4];                                                 \
 320         k[6*(i)+11] = ss[6] ^= k[6*(i)+ 5];                             \
 321 }
 322
 323 #define kdl6(k,i)                                                       \
 324 {                                                                       \
 325         ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];                         \
 326         k[6*(i)+ 6] = ss[0];                                            \
 327         ss[1] ^= ss[0];                                                 \
 328         k[6*(i)+ 7] = ss[1];                                            \
 329         ss[2] ^= ss[1];                                                 \
 330         k[6*(i)+ 8] = ss[2];                                            \
 331         ss[3] ^= ss[2];                                                 \
 332         k[6*(i)+ 9] = ss[3];                                            \
 333 }
 334
 335 #define kdf8(k,i)                                                       \
 336 {                                                                       \
 337         ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];                         \
 338         k[8*(i)+ 8] = ff(ss[0]);                                        \
 339         ss[1] ^= ss[0];                                                 \
 340         k[8*(i)+ 9] = ff(ss[1]);                                        \
 341         ss[2] ^= ss[1];                                                 \
 342         k[8*(i)+10] = ff(ss[2]);                                        \
 343         ss[3] ^= ss[2];                                                 \
 344         k[8*(i)+11] = ff(ss[3]);                                        \
 345         ss[4] ^= ls_box(ss[3],0);                                       \
 346         k[8*(i)+12] = ff(ss[4]);                                        \
 347         ss[5] ^= ss[4];                                                 \
 348         k[8*(i)+13] = ff(ss[5]);                                        \
 349         ss[6] ^= ss[5];                                                 \
 350         k[8*(i)+14] = ff(ss[6]);                                        \
 351         ss[7] ^= ss[6];                                                 \
 352         k[8*(i)+15] = ff(ss[7]);                                        \
 353 }
 354
 355 #define kd8(k,i)                                                        \
 356 {                                                                       \
 357         u32 __g = ls_box(ss[7],3) ^ rcon_tab[i];                        \
 358         ss[0] ^= __g;                                                   \
 359         __g = ff(__g);                                                  \
 360         k[8*(i)+ 8] = __g ^= k[8*(i)];                                  \
 361         ss[1] ^= ss[0];                                                 \
 362         k[8*(i)+ 9] = __g ^= k[8*(i)+ 1];                               \
 363         ss[2] ^= ss[1];                                                 \
 364         k[8*(i)+10] = __g ^= k[8*(i)+ 2];                               \
 365         ss[3] ^= ss[2];                                                 \
 366         k[8*(i)+11] = __g ^= k[8*(i)+ 3];                               \
 367         __g = ls_box(ss[3],0);                                          \
 368         ss[4] ^= __g;                                                   \
 369         __g = ff(__g);                                                  \
 370         k[8*(i)+12] = __g ^= k[8*(i)+ 4];                               \
 371         ss[5] ^= ss[4];                                                 \
 372         k[8*(i)+13] = __g ^= k[8*(i)+ 5];                               \
 373         ss[6] ^= ss[5];                                                 \
 374         k[8*(i)+14] = __g ^= k[8*(i)+ 6];                               \
 375         ss[7] ^= ss[6];                                                 \
 376         k[8*(i)+15] = __g ^= k[8*(i)+ 7];                               \
 377 }
 378
 379 #define kdl8(k,i)                                                       \
 380 {                                                                       \
 381         ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];                         \
 382         k[8*(i)+ 8] = ss[0];                                            \
 383         ss[1] ^= ss[0];                                                 \
 384         k[8*(i)+ 9] = ss[1];                                            \
 385         ss[2] ^= ss[1];                                                 \
 386         k[8*(i)+10] = ss[2];                                            \
 387         ss[3] ^= ss[2];                                                 \
 388         k[8*(i)+11] = ss[3];                                            \
 389 }
 390
 391 static int
 392 aes_set_key(void *ctx_arg, const u8 *in_key, unsigned int key_len, u32 *flags)
 393 {
 394         int i;
 395         u32 ss[8];
 396         struct aes_ctx *ctx = ctx_arg;
 397         const __le32 *key = (const __le32 *)in_key;
 398
 399         /* encryption schedule */
 400
 401         ctx->ekey[0] = ss[0] = le32_to_cpu(key[0]);
 402         ctx->ekey[1] = ss[1] = le32_to_cpu(key[1]);
 403         ctx->ekey[2] = ss[2] = le32_to_cpu(key[2]);
 404         ctx->ekey[3] = ss[3] = le32_to_cpu(key[3]);
 405
 406         switch(key_len) {
 407         case 16:
 408                 for (i = 0; i < 9; i++)
 409                         ke4(ctx->ekey, i);
 410                 kel4(ctx->ekey, 9);
 411                 ctx->rounds = 10;
 412                 break;
 413
 414         case 24:
 415                 ctx->ekey[4] = ss[4] = le32_to_cpu(key[4]);
 416                 ctx->ekey[5] = ss[5] = le32_to_cpu(key[5]);
 417                 for (i = 0; i < 7; i++)
 418                         ke6(ctx->ekey, i);
 419                 kel6(ctx->ekey, 7);
 420                 ctx->rounds = 12;
 421                 break;
 422
 423         case 32:
 424                 ctx->ekey[4] = ss[4] = le32_to_cpu(key[4]);
 425                 ctx->ekey[5] = ss[5] = le32_to_cpu(key[5]);
 426                 ctx->ekey[6] = ss[6] = le32_to_cpu(key[6]);
 427                 ctx->ekey[7] = ss[7] = le32_to_cpu(key[7]);
 428                 for (i = 0; i < 6; i++)
 429                         ke8(ctx->ekey, i);
 430                 kel8(ctx->ekey, 6);
 431                 ctx->rounds = 14;
 432                 break;
 433
 434         default:
 435                 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 436                 return -EINVAL;
 437         }
 438
 439         /* decryption schedule */
 440
 441         ctx->dkey[0] = ss[0] = le32_to_cpu(key[0]);
 442         ctx->dkey[1] = ss[1] = le32_to_cpu(key[1]);
 443         ctx->dkey[2] = ss[2] = le32_to_cpu(key[2]);
 444         ctx->dkey[3] = ss[3] = le32_to_cpu(key[3]);
 445
 446         switch (key_len) {
 447         case 16:
 448                 kdf4(ctx->dkey, 0);
 449                 for (i = 1; i < 9; i++)
 450                         kd4(ctx->dkey, i);
 451                 kdl4(ctx->dkey, 9);
 452                 break;
 453
 454         case 24:
 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                 kdf6(ctx->dkey, 0);
 458                 for (i = 1; i < 7; i++)
 459                         kd6(ctx->dkey, i);
 460                 kdl6(ctx->dkey, 7);
 461                 break;
 462
 463         case 32:
 464                 ctx->dkey[4] = ff(ss[4] = le32_to_cpu(key[4]));
 465                 ctx->dkey[5] = ff(ss[5] = le32_to_cpu(key[5]));
 466                 ctx->dkey[6] = ff(ss[6] = le32_to_cpu(key[6]));
 467                 ctx->dkey[7] = ff(ss[7] = le32_to_cpu(key[7]));
 468                 kdf8(ctx->dkey, 0);
 469                 for (i = 1; i < 6; i++)
 470                         kd8(ctx->dkey, i);
 471                 kdl8(ctx->dkey, 6);
 472                 break;
 473         }
 474         return 0;
 475 }
 476
 477 static inline void aes_encrypt(void *ctx, u8 *dst, const u8 *src)
 478 {
 479         aes_enc_blk(src, dst, ctx);
 480 }
 481 static inline void aes_decrypt(void *ctx, u8 *dst, const u8 *src)
 482 {
 483         aes_dec_blk(src, dst, ctx);
 484 }
 485
 486
 487 static struct crypto_alg aes_alg = {
 488         .cra_name               =       "aes",
 489         .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
 490         .cra_blocksize          =       AES_BLOCK_SIZE,
 491         .cra_ctxsize            =       sizeof(struct aes_ctx),
 492         .cra_module             =       THIS_MODULE,
 493         .cra_list               =       LIST_HEAD_INIT(aes_alg.cra_list),
 494         .cra_u                  =       {
 495                 .cipher = {
 496                         .cia_min_keysize        =       AES_MIN_KEY_SIZE,
 497                         .cia_max_keysize        =       AES_MAX_KEY_SIZE,
 498                         .cia_setkey             =       aes_set_key,
 499                         .cia_encrypt            =       aes_encrypt,
 500                         .cia_decrypt            =       aes_decrypt
 501                 }
 502         }
 503 };
 504
 505 static int __init aes_init(void)
 506 {
 507         gen_tabs();
 508         return crypto_register_alg(&aes_alg);
 509 }
 510
 511 static void __exit aes_fini(void)
 512 {
 513         crypto_unregister_alg(&aes_alg);
 514 }
 515
 516 module_init(aes_init);
 517 module_exit(aes_fini);
 518
 519 MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, i586 asm optimized");
 520 MODULE_LICENSE("Dual BSD/GPL");
 521 MODULE_AUTHOR("Fruhwirth Clemens, James Morris, Brian Gladman, Adam Richter");
 522 MODULE_ALIAS("aes");