sys/opencrypto/xform.c

   1 /*      $FreeBSD: src/sys/opencrypto/xform.c,v 1.1.2.1 2002/11/21 23:34:23 sam Exp $    */
   2 /*      $DragonFly: src/sys/opencrypto/xform.c,v 1.3 2008/03/01 22:03:13 swildner Exp $ */
   3 /*      $OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $  */
   4 /*
   5  * The authors of this code are John Ioannidis (ji@tla.org),
   6  * Angelos D. Keromytis (kermit@csd.uch.gr) and
   7  * Niels Provos (provos@physnet.uni-hamburg.de).
   8  *
   9  * This code was written by John Ioannidis for BSD/OS in Athens, Greece,
  10  * in November 1995.
  11  *
  12  * Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
  13  * by Angelos D. Keromytis.
  14  *
  15  * Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
  16  * and Niels Provos.
  17  *
  18  * Additional features in 1999 by Angelos D. Keromytis.
  19  *
  20  * Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
  21  * Angelos D. Keromytis and Niels Provos.
  22  *
  23  * Copyright (C) 2001, Angelos D. Keromytis.
  24  *
  25  * Permission to use, copy, and modify this software with or without fee
  26  * is hereby granted, provided that this entire notice is included in
  27  * all copies of any software which is or includes a copy or
  28  * modification of this software.
  29  * You may use this code under the GNU public license if you so wish. Please
  30  * contribute changes back to the authors under this freer than GPL license
  31  * so that we may further the use of strong encryption without limitations to
  32  * all.
  33  *
  34  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
  35  * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
  36  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
  37  * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
  38  * PURPOSE.
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/malloc.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/errno.h>
  46 #include <sys/time.h>
  47 #include <sys/kernel.h>
  48 #include <machine/cpu.h>
  49
  50 #include <crypto/blowfish/blowfish.h>
  51 #include <crypto/des/des.h>
  52 #include <crypto/sha1.h>
  53
  54 #include <opencrypto/cast.h>
  55 #include <opencrypto/deflate.h>
  56 #include <opencrypto/rijndael.h>
  57 #include <opencrypto/rmd160.h>
  58 #include <opencrypto/skipjack.h>
  59
  60 #include <sys/md5.h>
  61
  62 #include <opencrypto/cryptodev.h>
  63 #include <opencrypto/xform.h>
  64
  65 static void null_encrypt(caddr_t, u_int8_t *);
  66 static void null_decrypt(caddr_t, u_int8_t *);
  67 static int null_setkey(u_int8_t **, u_int8_t *, int);
  68 static void null_zerokey(u_int8_t **);
  69
  70 static  int des1_setkey(u_int8_t **, u_int8_t *, int);
  71 static  int des3_setkey(u_int8_t **, u_int8_t *, int);
  72 static  int blf_setkey(u_int8_t **, u_int8_t *, int);
  73 static  int cast5_setkey(u_int8_t **, u_int8_t *, int);
  74 static  int skipjack_setkey(u_int8_t **, u_int8_t *, int);
  75 static  int rijndael128_setkey(u_int8_t **, u_int8_t *, int);
  76 static  void des1_encrypt(caddr_t, u_int8_t *);
  77 static  void des3_encrypt(caddr_t, u_int8_t *);
  78 static  void blf_encrypt(caddr_t, u_int8_t *);
  79 static  void cast5_encrypt(caddr_t, u_int8_t *);
  80 static  void skipjack_encrypt(caddr_t, u_int8_t *);
  81 static  void rijndael128_encrypt(caddr_t, u_int8_t *);
  82 static  void des1_decrypt(caddr_t, u_int8_t *);
  83 static  void des3_decrypt(caddr_t, u_int8_t *);
  84 static  void blf_decrypt(caddr_t, u_int8_t *);
  85 static  void cast5_decrypt(caddr_t, u_int8_t *);
  86 static  void skipjack_decrypt(caddr_t, u_int8_t *);
  87 static  void rijndael128_decrypt(caddr_t, u_int8_t *);
  88 static  void des1_zerokey(u_int8_t **);
  89 static  void des3_zerokey(u_int8_t **);
  90 static  void blf_zerokey(u_int8_t **);
  91 static  void cast5_zerokey(u_int8_t **);
  92 static  void skipjack_zerokey(u_int8_t **);
  93 static  void rijndael128_zerokey(u_int8_t **);
  94
  95 static  void null_init(void *);
  96 static  int null_update(void *, u_int8_t *, u_int16_t);
  97 static  void null_final(u_int8_t *, void *);
  98 static  int MD5Update_int(void *, u_int8_t *, u_int16_t);
  99 static  void SHA1Init_int(void *);
 100 static  int SHA1Update_int(void *, u_int8_t *, u_int16_t);
 101 static  void SHA1Final_int(u_int8_t *, void *);
 102 static  int RMD160Update_int(void *, u_int8_t *, u_int16_t);
 103 static  int SHA256Update_int(void *, u_int8_t *, u_int16_t);
 104 static  int SHA384Update_int(void *, u_int8_t *, u_int16_t);
 105 static  int SHA512Update_int(void *, u_int8_t *, u_int16_t);
 106
 107 static  u_int32_t deflate_compress(u_int8_t *, u_int32_t, u_int8_t **);
 108 static  u_int32_t deflate_decompress(u_int8_t *, u_int32_t, u_int8_t **);
 109
 110 MALLOC_DEFINE(M_XDATA, "xform", "xform data buffers");
 111
 112 /* Encryption instances */
 113 struct enc_xform enc_xform_null = {
 114         CRYPTO_NULL_CBC, "NULL",
 115         /* NB: blocksize of 4 is to generate a properly aligned ESP header */
 116         4, 0, 256, /* 2048 bits, max key */
 117         null_encrypt,
 118         null_decrypt,
 119         null_setkey,
 120         null_zerokey,
 121 };
 122
 123 struct enc_xform enc_xform_des = {
 124         CRYPTO_DES_CBC, "DES",
 125         8, 8, 8,
 126         des1_encrypt,
 127         des1_decrypt,
 128         des1_setkey,
 129         des1_zerokey,
 130 };
 131
 132 struct enc_xform enc_xform_3des = {
 133         CRYPTO_3DES_CBC, "3DES",
 134         8, 24, 24,
 135         des3_encrypt,
 136         des3_decrypt,
 137         des3_setkey,
 138         des3_zerokey
 139 };
 140
 141 struct enc_xform enc_xform_blf = {
 142         CRYPTO_BLF_CBC, "Blowfish",
 143         8, 5, 56 /* 448 bits, max key */,
 144         blf_encrypt,
 145         blf_decrypt,
 146         blf_setkey,
 147         blf_zerokey
 148 };
 149
 150 struct enc_xform enc_xform_cast5 = {
 151         CRYPTO_CAST_CBC, "CAST-128",
 152         8, 5, 16,
 153         cast5_encrypt,
 154         cast5_decrypt,
 155         cast5_setkey,
 156         cast5_zerokey
 157 };
 158
 159 struct enc_xform enc_xform_skipjack = {
 160         CRYPTO_SKIPJACK_CBC, "Skipjack",
 161         8, 10, 10,
 162         skipjack_encrypt,
 163         skipjack_decrypt,
 164         skipjack_setkey,
 165         skipjack_zerokey
 166 };
 167
 168 struct enc_xform enc_xform_rijndael128 = {
 169         CRYPTO_RIJNDAEL128_CBC, "Rijndael-128/AES",
 170         16, 8, 32,
 171         rijndael128_encrypt,
 172         rijndael128_decrypt,
 173         rijndael128_setkey,
 174         rijndael128_zerokey,
 175 };
 176
 177 struct enc_xform enc_xform_arc4 = {
 178         CRYPTO_ARC4, "ARC4",
 179         1, 1, 32,
 180         NULL,
 181         NULL,
 182         NULL,
 183         NULL,
 184 };
 185
 186 /* Authentication instances */
 187 struct auth_hash auth_hash_null = {
 188         CRYPTO_NULL_HMAC, "NULL-HMAC",
 189         0, 0, 12, sizeof(int),                  /* NB: context isn't used */
 190         null_init, null_update, null_final
 191 };
 192
 193 struct auth_hash auth_hash_hmac_md5_96 = {
 194         CRYPTO_MD5_HMAC, "HMAC-MD5",
 195         16, 16, 12, sizeof(MD5_CTX),
 196         (void (*) (void *)) MD5Init, MD5Update_int,
 197         (void (*) (u_int8_t *, void *)) MD5Final
 198 };
 199
 200 struct auth_hash auth_hash_hmac_sha1_96 = {
 201         CRYPTO_SHA1_HMAC, "HMAC-SHA1",
 202         20, 20, 12, sizeof(SHA1_CTX),
 203         SHA1Init_int, SHA1Update_int, SHA1Final_int
 204 };
 205
 206 struct auth_hash auth_hash_hmac_ripemd_160_96 = {
 207         CRYPTO_RIPEMD160_HMAC, "HMAC-RIPEMD-160",
 208         20, 20, 12, sizeof(RMD160_CTX),
 209         (void (*)(void *)) RMD160Init, RMD160Update_int,
 210         (void (*)(u_int8_t *, void *)) RMD160Final
 211 };
 212
 213 struct auth_hash auth_hash_key_md5 = {
 214         CRYPTO_MD5_KPDK, "Keyed MD5",
 215         0, 16, 12, sizeof(MD5_CTX),
 216         (void (*)(void *)) MD5Init, MD5Update_int,
 217         (void (*)(u_int8_t *, void *)) MD5Final
 218 };
 219
 220 struct auth_hash auth_hash_key_sha1 = {
 221         CRYPTO_SHA1_KPDK, "Keyed SHA1",
 222         0, 20, 12, sizeof(SHA1_CTX),
 223         SHA1Init_int, SHA1Update_int, SHA1Final_int
 224 };
 225
 226 struct auth_hash auth_hash_hmac_sha2_256 = {
 227         CRYPTO_SHA2_HMAC, "HMAC-SHA2",
 228         32, 32, 12, sizeof(SHA256_CTX),
 229         (void (*)(void *)) SHA256_Init, SHA256Update_int,
 230         (void (*)(u_int8_t *, void *)) SHA256_Final
 231 };
 232
 233 struct auth_hash auth_hash_hmac_sha2_384 = {
 234         CRYPTO_SHA2_HMAC, "HMAC-SHA2-384",
 235         48, 48, 12, sizeof(SHA384_CTX),
 236         (void (*)(void *)) SHA384_Init, SHA384Update_int,
 237         (void (*)(u_int8_t *, void *)) SHA384_Final
 238 };
 239
 240 struct auth_hash auth_hash_hmac_sha2_512 = {
 241         CRYPTO_SHA2_HMAC, "HMAC-SHA2-512",
 242         64, 64, 12, sizeof(SHA512_CTX),
 243         (void (*)(void *)) SHA512_Init, SHA512Update_int,
 244         (void (*)(u_int8_t *, void *)) SHA512_Final
 245 };
 246
 247 /* Compression instance */
 248 struct comp_algo comp_algo_deflate = {
 249         CRYPTO_DEFLATE_COMP, "Deflate",
 250         90, deflate_compress,
 251         deflate_decompress
 252 };
 253
 254 /*
 255  * Encryption wrapper routines.
 256  */
 257 static void
 258 null_encrypt(caddr_t key, u_int8_t *blk)
 259 {
 260 }
 261 static void
 262 null_decrypt(caddr_t key, u_int8_t *blk)
 263 {
 264 }
 265 static int
 266 null_setkey(u_int8_t **sched, u_int8_t *key, int len)
 267 {
 268         *sched = NULL;
 269         return 0;
 270 }
 271 static void
 272 null_zerokey(u_int8_t **sched)
 273 {
 274         *sched = NULL;
 275 }
 276
 277 static void
 278 des1_encrypt(caddr_t key, u_int8_t *blk)
 279 {
 280         des_cblock *cb = (des_cblock *) blk;
 281         des_key_schedule *p = (des_key_schedule *) key;
 282
 283         des_ecb_encrypt(cb, cb, p[0], DES_ENCRYPT);
 284 }
 285
 286 static void
 287 des1_decrypt(caddr_t key, u_int8_t *blk)
 288 {
 289         des_cblock *cb = (des_cblock *) blk;
 290         des_key_schedule *p = (des_key_schedule *) key;
 291
 292         des_ecb_encrypt(cb, cb, p[0], DES_DECRYPT);
 293 }
 294
 295 static int
 296 des1_setkey(u_int8_t **sched, u_int8_t *key, int len)
 297 {
 298         des_key_schedule *p;
 299         int err;
 300
 301         MALLOC(p, des_key_schedule *, sizeof (des_key_schedule),
 302                 M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
 303         if (p != NULL) {
 304                 des_set_key((des_cblock *) key, p[0]);
 305                 err = 0;
 306         } else
 307                 err = ENOMEM;
 308         *sched = (u_int8_t *) p;
 309         return err;
 310 }
 311
 312 static void
 313 des1_zerokey(u_int8_t **sched)
 314 {
 315         bzero(*sched, sizeof (des_key_schedule));
 316         FREE(*sched, M_CRYPTO_DATA);
 317         *sched = NULL;
 318 }
 319
 320 static void
 321 des3_encrypt(caddr_t key, u_int8_t *blk)
 322 {
 323         des_cblock *cb = (des_cblock *) blk;
 324         des_key_schedule *p = (des_key_schedule *) key;
 325
 326         des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_ENCRYPT);
 327 }
 328
 329 static void
 330 des3_decrypt(caddr_t key, u_int8_t *blk)
 331 {
 332         des_cblock *cb = (des_cblock *) blk;
 333         des_key_schedule *p = (des_key_schedule *) key;
 334
 335         des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_DECRYPT);
 336 }
 337
 338 static int
 339 des3_setkey(u_int8_t **sched, u_int8_t *key, int len)
 340 {
 341         des_key_schedule *p;
 342         int err;
 343
 344         MALLOC(p, des_key_schedule *, 3*sizeof (des_key_schedule),
 345                 M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
 346         if (p != NULL) {
 347                 des_set_key((des_cblock *)(key +  0), p[0]);
 348                 des_set_key((des_cblock *)(key +  8), p[1]);
 349                 des_set_key((des_cblock *)(key + 16), p[2]);
 350                 err = 0;
 351         } else
 352                 err = ENOMEM;
 353         *sched = (u_int8_t *) p;
 354         return err;
 355 }
 356
 357 static void
 358 des3_zerokey(u_int8_t **sched)
 359 {
 360         bzero(*sched, 3*sizeof (des_key_schedule));
 361         FREE(*sched, M_CRYPTO_DATA);
 362         *sched = NULL;
 363 }
 364
 365 static void
 366 blf_encrypt(caddr_t key, u_int8_t *blk)
 367 {
 368         BF_LONG t[2];
 369
 370         memcpy(t, blk, sizeof (t));
 371         t[0] = ntohl(t[0]);
 372         t[1] = ntohl(t[1]);
 373         /* NB: BF_encrypt expects the block in host order! */
 374         BF_encrypt(t, (BF_KEY *) key);
 375         t[0] = htonl(t[0]);
 376         t[1] = htonl(t[1]);
 377         memcpy(blk, t, sizeof (t));
 378 }
 379
 380 static void
 381 blf_decrypt(caddr_t key, u_int8_t *blk)
 382 {
 383         BF_LONG t[2];
 384
 385         memcpy(t, blk, sizeof (t));
 386         t[0] = ntohl(t[0]);
 387         t[1] = ntohl(t[1]);
 388         /* NB: BF_decrypt expects the block in host order! */
 389         BF_decrypt(t, (BF_KEY *) key);
 390         t[0] = htonl(t[0]);
 391         t[1] = htonl(t[1]);
 392         memcpy(blk, t, sizeof (t));
 393 }
 394
 395 static int
 396 blf_setkey(u_int8_t **sched, u_int8_t *key, int len)
 397 {
 398         int err;
 399
 400         MALLOC(*sched, u_int8_t *, sizeof(BF_KEY),
 401                 M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
 402         if (*sched != NULL) {
 403                 BF_set_key((BF_KEY *) *sched, len, key);
 404                 err = 0;
 405         } else
 406                 err = ENOMEM;
 407         return err;
 408 }
 409
 410 static void
 411 blf_zerokey(u_int8_t **sched)
 412 {
 413         bzero(*sched, sizeof(BF_KEY));
 414         FREE(*sched, M_CRYPTO_DATA);
 415         *sched = NULL;
 416 }
 417
 418 static void
 419 cast5_encrypt(caddr_t key, u_int8_t *blk)
 420 {
 421         cast_encrypt((cast_key *) key, blk, blk);
 422 }
 423
 424 static void
 425 cast5_decrypt(caddr_t key, u_int8_t *blk)
 426 {
 427         cast_decrypt((cast_key *) key, blk, blk);
 428 }
 429
 430 static int
 431 cast5_setkey(u_int8_t **sched, u_int8_t *key, int len)
 432 {
 433         int err;
 434
 435         MALLOC(*sched, u_int8_t *, sizeof(cast_key), M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
 436         if (*sched != NULL) {
 437                 cast_setkey((cast_key *)*sched, key, len);
 438                 err = 0;
 439         } else
 440                 err = ENOMEM;
 441         return err;
 442 }
 443
 444 static void
 445 cast5_zerokey(u_int8_t **sched)
 446 {
 447         bzero(*sched, sizeof(cast_key));
 448         FREE(*sched, M_CRYPTO_DATA);
 449         *sched = NULL;
 450 }
 451
 452 static void
 453 skipjack_encrypt(caddr_t key, u_int8_t *blk)
 454 {
 455         skipjack_forwards(blk, blk, (u_int8_t **) key);
 456 }
 457
 458 static void
 459 skipjack_decrypt(caddr_t key, u_int8_t *blk)
 460 {
 461         skipjack_backwards(blk, blk, (u_int8_t **) key);
 462 }
 463
 464 static int
 465 skipjack_setkey(u_int8_t **sched, u_int8_t *key, int len)
 466 {
 467         int err;
 468
 469         /* NB: allocate all the memory that's needed at once */
 470         MALLOC(*sched, u_int8_t *, 10 * (sizeof(u_int8_t *) + 0x100),
 471                 M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
 472         if (*sched != NULL) {
 473                 u_int8_t** key_tables = (u_int8_t**) *sched;
 474                 u_int8_t* table = (u_int8_t*) &key_tables[10];
 475                 int k;
 476
 477                 for (k = 0; k < 10; k++) {
 478                         key_tables[k] = table;
 479                         table += 0x100;
 480                 }
 481                 subkey_table_gen(key, (u_int8_t **) *sched);
 482                 err = 0;
 483         } else
 484                 err = ENOMEM;
 485         return err;
 486 }
 487
 488 static void
 489 skipjack_zerokey(u_int8_t **sched)
 490 {
 491         bzero(*sched, 10 * (sizeof(u_int8_t *) + 0x100));
 492         FREE(*sched, M_CRYPTO_DATA);
 493         *sched = NULL;
 494 }
 495
 496 static void
 497 rijndael128_encrypt(caddr_t key, u_int8_t *blk)
 498 {
 499         rijndael_encrypt((rijndael_ctx *) key, (u_char *) blk, (u_char *) blk);
 500 }
 501
 502 static void
 503 rijndael128_decrypt(caddr_t key, u_int8_t *blk)
 504 {
 505         rijndael_decrypt(((rijndael_ctx *) key) + 1, (u_char *) blk,
 506             (u_char *) blk);
 507 }
 508
 509 static int
 510 rijndael128_setkey(u_int8_t **sched, u_int8_t *key, int len)
 511 {
 512         int err;
 513
 514         MALLOC(*sched, u_int8_t *, 2 * sizeof(rijndael_ctx), M_CRYPTO_DATA,
 515             M_NOWAIT|M_ZERO);
 516         if (*sched != NULL) {
 517                 rijndael_set_key((rijndael_ctx *) *sched, (u_char *) key, len * 8, 1);
 518                 rijndael_set_key(((rijndael_ctx *) *sched) + 1, (u_char *) key,
 519                     len * 8, 0);
 520                 err = 0;
 521         } else
 522                 err = ENOMEM;
 523         return err;
 524 }
 525
 526 static void
 527 rijndael128_zerokey(u_int8_t **sched)
 528 {
 529         bzero(*sched, 2 * sizeof(rijndael_ctx));
 530         FREE(*sched, M_CRYPTO_DATA);
 531         *sched = NULL;
 532 }
 533
 534 /*
 535  * And now for auth.
 536  */
 537
 538 static void
 539 null_init(void *ctx)
 540 {
 541 }
 542
 543 static int
 544 null_update(void *ctx, u_int8_t *buf, u_int16_t len)
 545 {
 546         return 0;
 547 }
 548
 549 static void
 550 null_final(u_int8_t *buf, void *ctx)
 551 {
 552         if (buf != (u_int8_t *) 0)
 553                 bzero(buf, 12);
 554 }
 555
 556 static int
 557 RMD160Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
 558 {
 559         RMD160Update(ctx, buf, len);
 560         return 0;
 561 }
 562
 563 static int
 564 MD5Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
 565 {
 566         MD5Update(ctx, buf, len);
 567         return 0;
 568 }
 569
 570 static void
 571 SHA1Init_int(void *ctx)
 572 {
 573         SHA1Init(ctx);
 574 }
 575
 576 static int
 577 SHA1Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
 578 {
 579         SHA1Update(ctx, buf, len);
 580         return 0;
 581 }
 582
 583 static void
 584 SHA1Final_int(u_int8_t *blk, void *ctx)
 585 {
 586         SHA1Final(blk, ctx);
 587 }
 588
 589 static int
 590 SHA256Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
 591 {
 592         SHA256_Update(ctx, buf, len);
 593         return 0;
 594 }
 595
 596 static int
 597 SHA384Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
 598 {
 599         SHA384_Update(ctx, buf, len);
 600         return 0;
 601 }
 602
 603 static int
 604 SHA512Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
 605 {
 606         SHA512_Update(ctx, buf, len);
 607         return 0;
 608 }
 609
 610 /*
 611  * And compression
 612  */
 613
 614 static u_int32_t
 615 deflate_compress(u_int8_t *data, u_int32_t size, u_int8_t **out)
 616 {
 617         return deflate_global(data, size, 0, out);
 618 }
 619
 620 static u_int32_t
 621 deflate_decompress(u_int8_t *data, u_int32_t size, u_int8_t **out)
 622 {
 623         return deflate_global(data, size, 1, out);
 624 }