l4/pkg/libcrypto/lib/aes_linux_586/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 #define BUILD_FOR_L4 1
  41 #ifndef BUILD_FOR_L4
  42
  43 #include <asm/byteorder.h>
  44 #include <linux/kernel.h>
  45 #include <linux/module.h>
  46 #include <linux/init.h>
  47 #include <linux/types.h>
  48 #include <linux/crypto.h>
  49 #include <linux/linkage.h>
  50
  51 #else
  52
  53 #define __LIBCRYPTO_INTERNAL__
  54 #include "aes.h"
  55
  56 #endif /* BUILD_FOR_L4 */
  57
  58
  59 asmlinkage void aes_enc_blk(const u8 *src, u8 *dst, void *ctx);
  60 asmlinkage void aes_dec_blk(const u8 *src, u8 *dst, void *ctx);
  61
  62 #ifndef BUILD_FOR_L4
  63
  64 #define AES_MIN_KEY_SIZE        16
  65 #define AES_MAX_KEY_SIZE        32
  66 #define AES_BLOCK_SIZE          16
  67 #define AES_KS_LENGTH           4 * AES_BLOCK_SIZE
  68 #define RC_LENGTH               29
  69
  70 struct aes_ctx {
  71         u32 ekey[AES_KS_LENGTH];
  72         u32 rounds;
  73         u32 dkey[AES_KS_LENGTH];
  74 };
  75 #else
  76 # define aes_ctx aes_586_ctx
  77 #endif
  78
  79
  80 #define WPOLY 0x011b
  81 #define bytes2word(b0, b1, b2, b3)  \
  82         (((u32)(b3) << 24) | ((u32)(b2) << 16) | ((u32)(b1) << 8) | (b0))
  83
  84 /* define the finite field multiplies required for Rijndael */
  85 #define f2(x) ((x) ? pow[log[x] + 0x19] : 0)
  86 #define f3(x) ((x) ? pow[log[x] + 0x01] : 0)
  87 #define f9(x) ((x) ? pow[log[x] + 0xc7] : 0)
  88 #define fb(x) ((x) ? pow[log[x] + 0x68] : 0)
  89 #define fd(x) ((x) ? pow[log[x] + 0xee] : 0)
  90 #define fe(x) ((x) ? pow[log[x] + 0xdf] : 0)
  91 #define fi(x) ((x) ?   pow[255 - log[x]]: 0)
  92
  93 static inline u32 upr(u32 x, int n)
  94 {
  95         return (x << 8 * n) | (x >> (32 - 8 * n));
  96 }
  97
  98 static inline u8 bval(u32 x, int n)
  99 {
 100         return x >> 8 * n;
 101 }
 102
 103 /* The forward and inverse affine transformations used in the S-box */
 104 #define fwd_affine(x) \
 105         (w = (u32)x, w ^= (w<<1)^(w<<2)^(w<<3)^(w<<4), 0x63^(u8)(w^(w>>8)))
 106
 107 #define inv_affine(x) \
 108         (w = (u32)x, w = (w<<1)^(w<<3)^(w<<6), 0x05^(u8)(w^(w>>8)))
 109
 110 static u32 rcon_tab[RC_LENGTH];
 111
 112 u32 ft_tab[4][256];
 113 u32 fl_tab[4][256];
 114 static u32 im_tab[4][256];
 115 u32 il_tab[4][256];
 116 u32 it_tab[4][256];
 117
 118 static void gen_tabs(void)
 119 {
 120         u32 i, w;
 121         u8 pow[512], log[256];
 122
 123         /*
 124          * log and power tables for GF(2^8) finite field with
 125          * WPOLY as modular polynomial - the simplest primitive
 126          * root is 0x03, used here to generate the tables.
 127          */
 128         i = 0; w = 1;
 129
 130         do {
 131                 pow[i] = (u8)w;
 132                 pow[i + 255] = (u8)w;
 133                 log[w] = (u8)i++;
 134                 w ^=  (w << 1) ^ (w & 0x80 ? WPOLY : 0);
 135         } while (w != 1);
 136
 137         for(i = 0, w = 1; i < RC_LENGTH; ++i) {
 138                 rcon_tab[i] = bytes2word(w, 0, 0, 0);
 139                 w = f2(w);
 140         }
 141
 142         for(i = 0; i < 256; ++i) {
 143                 u8 b;
 144
 145                 b = fwd_affine(fi((u8)i));
 146                 w = bytes2word(f2(b), b, b, f3(b));
 147
 148                 /* tables for a normal encryption round */
 149                 ft_tab[0][i] = w;
 150                 ft_tab[1][i] = upr(w, 1);
 151                 ft_tab[2][i] = upr(w, 2);
 152                 ft_tab[3][i] = upr(w, 3);
 153                 w = bytes2word(b, 0, 0, 0);
 154
 155                 /*
 156                  * tables for last encryption round
 157                  * (may also be used in the key schedule)
 158                  */
 159                 fl_tab[0][i] = w;
 160                 fl_tab[1][i] = upr(w, 1);
 161                 fl_tab[2][i] = upr(w, 2);
 162                 fl_tab[3][i] = upr(w, 3);
 163
 164                 b = fi(inv_affine((u8)i));
 165                 w = bytes2word(fe(b), f9(b), fd(b), fb(b));
 166
 167                 /* tables for the inverse mix column operation  */
 168                 im_tab[0][b] = w;
 169                 im_tab[1][b] = upr(w, 1);
 170                 im_tab[2][b] = upr(w, 2);
 171                 im_tab[3][b] = upr(w, 3);
 172
 173                 /* tables for a normal decryption round */
 174                 it_tab[0][i] = w;
 175                 it_tab[1][i] = upr(w,1);
 176                 it_tab[2][i] = upr(w,2);
 177                 it_tab[3][i] = upr(w,3);
 178
 179                 w = bytes2word(b, 0, 0, 0);
 180
 181                 /* tables for last decryption round */
 182                 il_tab[0][i] = w;
 183                 il_tab[1][i] = upr(w,1);
 184                 il_tab[2][i] = upr(w,2);
 185                 il_tab[3][i] = upr(w,3);
 186     }
 187 }
 188
 189 #define four_tables(x,tab,vf,rf,c)              \
 190 (       tab[0][bval(vf(x,0,c),rf(0,c))] ^       \
 191         tab[1][bval(vf(x,1,c),rf(1,c))] ^       \
 192         tab[2][bval(vf(x,2,c),rf(2,c))] ^       \
 193         tab[3][bval(vf(x,3,c),rf(3,c))]         \
 194 )
 195
 196 #define vf1(x,r,c)  (x)
 197 #define rf1(r,c)    (r)
 198 #define rf2(r,c)    ((r-c)&3)
 199
 200 #define inv_mcol(x) four_tables(x,im_tab,vf1,rf1,0)
 201 #define ls_box(x,c) four_tables(x,fl_tab,vf1,rf2,c)
 202
 203 #define ff(x) inv_mcol(x)
 204
 205 #define ke4(k,i)                                                        \
 206 {                                                                       \
 207         k[4*(i)+4] = ss[0] ^= ls_box(ss[3],3) ^ rcon_tab[i];            \
 208         k[4*(i)+5] = ss[1] ^= ss[0];                                    \
 209         k[4*(i)+6] = ss[2] ^= ss[1];                                    \
 210         k[4*(i)+7] = ss[3] ^= ss[2];                                    \
 211 }
 212
 213 #define kel4(k,i)                                                       \
 214 {                                                                       \
 215         k[4*(i)+4] = ss[0] ^= ls_box(ss[3],3) ^ rcon_tab[i];            \
 216         k[4*(i)+5] = ss[1] ^= ss[0];                                    \
 217         k[4*(i)+6] = ss[2] ^= ss[1]; k[4*(i)+7] = ss[3] ^= ss[2];       \
 218 }
 219
 220 #define ke6(k,i)                                                        \
 221 {                                                                       \
 222         k[6*(i)+ 6] = ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];           \
 223         k[6*(i)+ 7] = ss[1] ^= ss[0];                                   \
 224         k[6*(i)+ 8] = ss[2] ^= ss[1];                                   \
 225         k[6*(i)+ 9] = ss[3] ^= ss[2];                                   \
 226         k[6*(i)+10] = ss[4] ^= ss[3];                                   \
 227         k[6*(i)+11] = ss[5] ^= ss[4];                                   \
 228 }
 229
 230 #define kel6(k,i)                                                       \
 231 {                                                                       \
 232         k[6*(i)+ 6] = ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];           \
 233         k[6*(i)+ 7] = ss[1] ^= ss[0];                                   \
 234         k[6*(i)+ 8] = ss[2] ^= ss[1];                                   \
 235         k[6*(i)+ 9] = ss[3] ^= ss[2];                                   \
 236 }
 237
 238 #define ke8(k,i)                                                        \
 239 {                                                                       \
 240         k[8*(i)+ 8] = ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];           \
 241         k[8*(i)+ 9] = ss[1] ^= ss[0];                                   \
 242         k[8*(i)+10] = ss[2] ^= ss[1];                                   \
 243         k[8*(i)+11] = ss[3] ^= ss[2];                                   \
 244         k[8*(i)+12] = ss[4] ^= ls_box(ss[3],0);                         \
 245         k[8*(i)+13] = ss[5] ^= ss[4];                                   \
 246         k[8*(i)+14] = ss[6] ^= ss[5];                                   \
 247         k[8*(i)+15] = ss[7] ^= ss[6];                                   \
 248 }
 249
 250 #define kel8(k,i)                                                       \
 251 {                                                                       \
 252         k[8*(i)+ 8] = ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];           \
 253         k[8*(i)+ 9] = ss[1] ^= ss[0];                                   \
 254         k[8*(i)+10] = ss[2] ^= ss[1];                                   \
 255         k[8*(i)+11] = ss[3] ^= ss[2];                                   \
 256 }
 257
 258 #define kdf4(k,i)                                                       \
 259 {                                                                       \
 260         ss[0] = ss[0] ^ ss[2] ^ ss[1] ^ ss[3];                          \
 261         ss[1] = ss[1] ^ ss[3];                                          \
 262         ss[2] = ss[2] ^ ss[3];                                          \
 263         ss[3] = ss[3];                                                  \
 264         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 265         ss[i % 4] ^= ss[4];                                             \
 266         ss[4] ^= k[4*(i)];                                              \
 267         k[4*(i)+4] = ff(ss[4]);                                         \
 268         ss[4] ^= k[4*(i)+1];                                            \
 269         k[4*(i)+5] = ff(ss[4]);                                         \
 270         ss[4] ^= k[4*(i)+2];                                            \
 271         k[4*(i)+6] = ff(ss[4]);                                         \
 272         ss[4] ^= k[4*(i)+3];                                            \
 273         k[4*(i)+7] = ff(ss[4]);                                         \
 274 }
 275
 276 #define kd4(k,i)                                                        \
 277 {                                                                       \
 278         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 279         ss[i % 4] ^= ss[4];                                             \
 280         ss[4] = ff(ss[4]);                                              \
 281         k[4*(i)+4] = ss[4] ^= k[4*(i)];                                 \
 282         k[4*(i)+5] = ss[4] ^= k[4*(i)+1];                               \
 283         k[4*(i)+6] = ss[4] ^= k[4*(i)+2];                               \
 284         k[4*(i)+7] = ss[4] ^= k[4*(i)+3];                               \
 285 }
 286
 287 #define kdl4(k,i)                                                       \
 288 {                                                                       \
 289         ss[4] = ls_box(ss[(i+3) % 4], 3) ^ rcon_tab[i];                 \
 290         ss[i % 4] ^= ss[4];                                             \
 291         k[4*(i)+4] = (ss[0] ^= ss[1]) ^ ss[2] ^ ss[3];                  \
 292         k[4*(i)+5] = ss[1] ^ ss[3];                                     \
 293         k[4*(i)+6] = ss[0];                                             \
 294         k[4*(i)+7] = ss[1];                                             \
 295 }
 296
 297 #define kdf6(k,i)                                                       \
 298 {                                                                       \
 299         ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];                         \
 300         k[6*(i)+ 6] = ff(ss[0]);                                        \
 301         ss[1] ^= ss[0];                                                 \
 302         k[6*(i)+ 7] = ff(ss[1]);                                        \
 303         ss[2] ^= ss[1];                                                 \
 304         k[6*(i)+ 8] = ff(ss[2]);                                        \
 305         ss[3] ^= ss[2];                                                 \
 306         k[6*(i)+ 9] = ff(ss[3]);                                        \
 307         ss[4] ^= ss[3];                                                 \
 308         k[6*(i)+10] = ff(ss[4]);                                        \
 309         ss[5] ^= ss[4];                                                 \
 310         k[6*(i)+11] = ff(ss[5]);                                        \
 311 }
 312
 313 #define kd6(k,i)                                                        \
 314 {                                                                       \
 315         ss[6] = ls_box(ss[5],3) ^ rcon_tab[i];                          \
 316         ss[0] ^= ss[6]; ss[6] = ff(ss[6]);                              \
 317         k[6*(i)+ 6] = ss[6] ^= k[6*(i)];                                \
 318         ss[1] ^= ss[0];                                                 \
 319         k[6*(i)+ 7] = ss[6] ^= k[6*(i)+ 1];                             \
 320         ss[2] ^= ss[1];                                                 \
 321         k[6*(i)+ 8] = ss[6] ^= k[6*(i)+ 2];                             \
 322         ss[3] ^= ss[2];                                                 \
 323         k[6*(i)+ 9] = ss[6] ^= k[6*(i)+ 3];                             \
 324         ss[4] ^= ss[3];                                                 \
 325         k[6*(i)+10] = ss[6] ^= k[6*(i)+ 4];                             \
 326         ss[5] ^= ss[4];                                                 \
 327         k[6*(i)+11] = ss[6] ^= k[6*(i)+ 5];                             \
 328 }
 329
 330 #define kdl6(k,i)                                                       \
 331 {                                                                       \
 332         ss[0] ^= ls_box(ss[5],3) ^ rcon_tab[i];                         \
 333         k[6*(i)+ 6] = ss[0];                                            \
 334         ss[1] ^= ss[0];                                                 \
 335         k[6*(i)+ 7] = ss[1];                                            \
 336         ss[2] ^= ss[1];                                                 \
 337         k[6*(i)+ 8] = ss[2];                                            \
 338         ss[3] ^= ss[2];                                                 \
 339         k[6*(i)+ 9] = ss[3];                                            \
 340 }
 341
 342 #define kdf8(k,i)                                                       \
 343 {                                                                       \
 344         ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];                         \
 345         k[8*(i)+ 8] = ff(ss[0]);                                        \
 346         ss[1] ^= ss[0];                                                 \
 347         k[8*(i)+ 9] = ff(ss[1]);                                        \
 348         ss[2] ^= ss[1];                                                 \
 349         k[8*(i)+10] = ff(ss[2]);                                        \
 350         ss[3] ^= ss[2];                                                 \
 351         k[8*(i)+11] = ff(ss[3]);                                        \
 352         ss[4] ^= ls_box(ss[3],0);                                       \
 353         k[8*(i)+12] = ff(ss[4]);                                        \
 354         ss[5] ^= ss[4];                                                 \
 355         k[8*(i)+13] = ff(ss[5]);                                        \
 356         ss[6] ^= ss[5];                                                 \
 357         k[8*(i)+14] = ff(ss[6]);                                        \
 358         ss[7] ^= ss[6];                                                 \
 359         k[8*(i)+15] = ff(ss[7]);                                        \
 360 }
 361
 362 #define kd8(k,i)                                                        \
 363 {                                                                       \
 364         u32 __g = ls_box(ss[7],3) ^ rcon_tab[i];                        \
 365         ss[0] ^= __g;                                                   \
 366         __g = ff(__g);                                                  \
 367         k[8*(i)+ 8] = __g ^= k[8*(i)];                                  \
 368         ss[1] ^= ss[0];                                                 \
 369         k[8*(i)+ 9] = __g ^= k[8*(i)+ 1];                               \
 370         ss[2] ^= ss[1];                                                 \
 371         k[8*(i)+10] = __g ^= k[8*(i)+ 2];                               \
 372         ss[3] ^= ss[2];                                                 \
 373         k[8*(i)+11] = __g ^= k[8*(i)+ 3];                               \
 374         __g = ls_box(ss[3],0);                                          \
 375         ss[4] ^= __g;                                                   \
 376         __g = ff(__g);                                                  \
 377         k[8*(i)+12] = __g ^= k[8*(i)+ 4];                               \
 378         ss[5] ^= ss[4];                                                 \
 379         k[8*(i)+13] = __g ^= k[8*(i)+ 5];                               \
 380         ss[6] ^= ss[5];                                                 \
 381         k[8*(i)+14] = __g ^= k[8*(i)+ 6];                               \
 382         ss[7] ^= ss[6];                                                 \
 383         k[8*(i)+15] = __g ^= k[8*(i)+ 7];                               \
 384 }
 385
 386 #define kdl8(k,i)                                                       \
 387 {                                                                       \
 388         ss[0] ^= ls_box(ss[7],3) ^ rcon_tab[i];                         \
 389         k[8*(i)+ 8] = ss[0];                                            \
 390         ss[1] ^= ss[0];                                                 \
 391         k[8*(i)+ 9] = ss[1];                                            \
 392         ss[2] ^= ss[1];                                                 \
 393         k[8*(i)+10] = ss[2];                                            \
 394         ss[3] ^= ss[2];                                                 \
 395         k[8*(i)+11] = ss[3];                                            \
 396 }
 397
 398 static int
 399 aes_set_key(void *ctx_arg, const u8 *in_key, unsigned int key_len, u32 *flags)
 400 {
 401         int i;
 402         u32 ss[8];
 403         struct aes_ctx *ctx = ctx_arg;
 404         const __le32 *key = (const __le32 *)in_key;
 405
 406         /* encryption schedule */
 407
 408         ctx->ekey[0] = ss[0] = le32_to_cpu(key[0]);
 409         ctx->ekey[1] = ss[1] = le32_to_cpu(key[1]);
 410         ctx->ekey[2] = ss[2] = le32_to_cpu(key[2]);
 411         ctx->ekey[3] = ss[3] = le32_to_cpu(key[3]);
 412
 413         switch(key_len) {
 414         case 16:
 415                 for (i = 0; i < 9; i++)
 416                         ke4(ctx->ekey, i);
 417                 kel4(ctx->ekey, 9);
 418                 ctx->rounds = 10;
 419                 break;
 420
 421         case 24:
 422                 ctx->ekey[4] = ss[4] = le32_to_cpu(key[4]);
 423                 ctx->ekey[5] = ss[5] = le32_to_cpu(key[5]);
 424                 for (i = 0; i < 7; i++)
 425                         ke6(ctx->ekey, i);
 426                 kel6(ctx->ekey, 7);
 427                 ctx->rounds = 12;
 428                 break;
 429
 430         case 32:
 431                 ctx->ekey[4] = ss[4] = le32_to_cpu(key[4]);
 432                 ctx->ekey[5] = ss[5] = le32_to_cpu(key[5]);
 433                 ctx->ekey[6] = ss[6] = le32_to_cpu(key[6]);
 434                 ctx->ekey[7] = ss[7] = le32_to_cpu(key[7]);
 435                 for (i = 0; i < 6; i++)
 436                         ke8(ctx->ekey, i);
 437                 kel8(ctx->ekey, 6);
 438                 ctx->rounds = 14;
 439                 break;
 440
 441         default:
 442                 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 443                 return -EINVAL;
 444         }
 445
 446         /* decryption schedule */
 447
 448         ctx->dkey[0] = ss[0] = le32_to_cpu(key[0]);
 449         ctx->dkey[1] = ss[1] = le32_to_cpu(key[1]);
 450         ctx->dkey[2] = ss[2] = le32_to_cpu(key[2]);
 451         ctx->dkey[3] = ss[3] = le32_to_cpu(key[3]);
 452
 453         switch (key_len) {
 454         case 16:
 455                 kdf4(ctx->dkey, 0);
 456                 for (i = 1; i < 9; i++)
 457                         kd4(ctx->dkey, i);
 458                 kdl4(ctx->dkey, 9);
 459                 break;
 460
 461         case 24:
 462                 ctx->dkey[4] = ff(ss[4] = le32_to_cpu(key[4]));
 463                 ctx->dkey[5] = ff(ss[5] = le32_to_cpu(key[5]));
 464                 kdf6(ctx->dkey, 0);
 465                 for (i = 1; i < 7; i++)
 466                         kd6(ctx->dkey, i);
 467                 kdl6(ctx->dkey, 7);
 468                 break;
 469
 470         case 32:
 471                 ctx->dkey[4] = ff(ss[4] = le32_to_cpu(key[4]));
 472                 ctx->dkey[5] = ff(ss[5] = le32_to_cpu(key[5]));
 473                 ctx->dkey[6] = ff(ss[6] = le32_to_cpu(key[6]));
 474                 ctx->dkey[7] = ff(ss[7] = le32_to_cpu(key[7]));
 475                 kdf8(ctx->dkey, 0);
 476                 for (i = 1; i < 6; i++)
 477                         kd8(ctx->dkey, i);
 478                 kdl8(ctx->dkey, 6);
 479                 break;
 480         }
 481         return 0;
 482 }
 483
 484 static inline void aes_encrypt(void *ctx, u8 *dst, const u8 *src)
 485 {
 486         aes_enc_blk(src, dst, ctx);
 487 }
 488 static inline void aes_decrypt(void *ctx, u8 *dst, const u8 *src)
 489 {
 490         aes_dec_blk(src, dst, ctx);
 491 }
 492
 493
 494 #ifndef BUILD_FOR_L4
 495
 496 static struct crypto_alg aes_alg = {
 497         .cra_name               =       "aes",
 498         .cra_driver_name        =       "aes-i586",
 499         .cra_priority           =       200,
 500         .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
 501         .cra_blocksize          =       AES_BLOCK_SIZE,
 502         .cra_ctxsize            =       sizeof(struct aes_ctx),
 503         .cra_module             =       THIS_MODULE,
 504         .cra_list               =       LIST_HEAD_INIT(aes_alg.cra_list),
 505         .cra_u                  =       {
 506                 .cipher = {
 507                         .cia_min_keysize        =       AES_MIN_KEY_SIZE,
 508                         .cia_max_keysize        =       AES_MAX_KEY_SIZE,
 509                         .cia_setkey             =       aes_set_key,
 510                         .cia_encrypt            =       aes_encrypt,
 511                         .cia_decrypt            =       aes_decrypt
 512                 }
 513         }
 514 };
 515
 516 static int __init aes_init(void)
 517 {
 518         gen_tabs();
 519         return crypto_register_alg(&aes_alg);
 520 }
 521
 522 static void __exit aes_fini(void)
 523 {
 524         crypto_unregister_alg(&aes_alg);
 525 }
 526
 527 module_init(aes_init);
 528 module_exit(aes_fini);
 529
 530 MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, i586 asm optimized");
 531 MODULE_LICENSE("Dual BSD/GPL");
 532 MODULE_AUTHOR("Fruhwirth Clemens, James Morris, Brian Gladman, Adam Richter");
 533 MODULE_ALIAS("aes");
 534
 535 #else
 536
 537 crypto_cipher_set_key_fn_t aes_cipher_set_key = (crypto_cipher_set_key_fn_t) aes_set_key;
 538 crypto_cipher_encrypt_fn_t aes_cipher_encrypt = (crypto_cipher_encrypt_fn_t) aes_encrypt;
 539 crypto_cipher_decrypt_fn_t aes_cipher_decrypt = (crypto_cipher_decrypt_fn_t) aes_decrypt;
 540
 541 static void init(void) __attribute__((constructor));
 542 static void init(void)
 543 {
 544         gen_tabs();
 545 }
 546
 547 #endif /* BUILD_FOR_L4 */