1 /*- 2 * The author of this code is Angelos D. Keromytis (angelos@cis.upenn.edu) 3 * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting 4 * 5 * This code was written by Angelos D. Keromytis in Athens, Greece, in 6 * February 2000. Network Security Technologies Inc. (NSTI) kindly 7 * supported the development of this code. 8 * 9 * Copyright (c) 2000, 2001 Angelos D. Keromytis 10 * 11 * SMP modifications by Matthew Dillon for the DragonFlyBSD Project 12 * 13 * Permission to use, copy, and modify this software with or without fee 14 * is hereby granted, provided that this entire notice is included in 15 * all source code copies of any software which is or includes a copy or 16 * modification of this software. 17 * 18 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR 19 * IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY 20 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE 21 * MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR 22 * PURPOSE. 23 * 24 * $FreeBSD: src/sys/opencrypto/cryptosoft.c,v 1.23 2009/02/05 17:43:12 imp Exp $ 25 * $OpenBSD: cryptosoft.c,v 1.35 2002/04/26 08:43:50 deraadt Exp $ 26 */ 27 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/malloc.h> 31 #include <sys/mbuf.h> 32 #include <sys/module.h> 33 #include <sys/sysctl.h> 34 #include <sys/errno.h> 35 #include <sys/endian.h> 36 #include <sys/random.h> 37 #include <sys/kernel.h> 38 #include <sys/uio.h> 39 #include <sys/spinlock2.h> 40 41 #include <crypto/blowfish/blowfish.h> 42 #include <crypto/sha1.h> 43 #include <opencrypto/rmd160.h> 44 #include <opencrypto/cast.h> 45 #include <opencrypto/skipjack.h> 46 #include <sys/md5.h> 47 48 #include <opencrypto/cryptodev.h> 49 #include <opencrypto/cryptosoft.h> 50 #include <opencrypto/xform.h> 51 52 #include <sys/kobj.h> 53 #include <sys/bus.h> 54 #include "cryptodev_if.h" 55 56 static int32_t swcr_id; 57 static struct swcr_data **swcr_sessions = NULL; 58 static u_int32_t swcr_sesnum; 59 static u_int32_t swcr_minsesnum = 1; 60 61 static struct spinlock swcr_spin = SPINLOCK_INITIALIZER(swcr_spin, "swcr_spin"); 62 63 u_int8_t hmac_ipad_buffer[HMAC_MAX_BLOCK_LEN]; 64 u_int8_t hmac_opad_buffer[HMAC_MAX_BLOCK_LEN]; 65 66 static int swcr_encdec(struct cryptodesc *, struct swcr_data *, caddr_t, int); 67 static int swcr_authcompute(struct cryptodesc *, struct swcr_data *, caddr_t, int); 68 static int swcr_combined(struct cryptop *); 69 static int swcr_compdec(struct cryptodesc *, struct swcr_data *, caddr_t, int); 70 static int swcr_freesession(device_t dev, u_int64_t tid); 71 static int swcr_freesession_slot(struct swcr_data **swdp, u_int32_t sid); 72 73 /* 74 * Apply a symmetric encryption/decryption algorithm. 75 */ 76 static int 77 swcr_encdec(struct cryptodesc *crd, struct swcr_data *sw, caddr_t buf, 78 int flags) 79 { 80 unsigned char iv[EALG_MAX_BLOCK_LEN], blk[EALG_MAX_BLOCK_LEN], *idat; 81 unsigned char *ivp, *nivp, iv2[EALG_MAX_BLOCK_LEN]; 82 u_int8_t *kschedule; 83 u_int8_t *okschedule; 84 struct enc_xform *exf; 85 int i, k, j, blks, ivlen; 86 int error; 87 int explicit_kschedule; 88 89 exf = sw->sw_exf; 90 blks = exf->blocksize; 91 ivlen = exf->ivsize; 92 93 /* Check for non-padded data */ 94 if (crd->crd_len % blks) 95 return EINVAL; 96 97 /* Initialize the IV */ 98 if (crd->crd_flags & CRD_F_ENCRYPT) { 99 /* IV explicitly provided ? */ 100 if (crd->crd_flags & CRD_F_IV_EXPLICIT) 101 bcopy(crd->crd_iv, iv, ivlen); 102 else 103 karc4rand(iv, ivlen); 104 105 /* Do we need to write the IV */ 106 if (!(crd->crd_flags & CRD_F_IV_PRESENT)) 107 crypto_copyback(flags, buf, crd->crd_inject, ivlen, iv); 108 109 } else { /* Decryption */ 110 /* IV explicitly provided ? */ 111 if (crd->crd_flags & CRD_F_IV_EXPLICIT) 112 bcopy(crd->crd_iv, iv, ivlen); 113 else { 114 /* Get IV off buf */ 115 crypto_copydata(flags, buf, crd->crd_inject, ivlen, iv); 116 } 117 } 118 119 ivp = iv; 120 121 /* 122 * The semantics are seriously broken because the session key 123 * storage was never designed for concurrent ops. 124 */ 125 if (crd->crd_flags & CRD_F_KEY_EXPLICIT) { 126 kschedule = NULL; 127 explicit_kschedule = 1; 128 error = exf->setkey(&kschedule, 129 crd->crd_key, crd->crd_klen / 8); 130 if (error) 131 goto done; 132 } else { 133 spin_lock(&swcr_spin); 134 kschedule = sw->sw_kschedule; 135 ++sw->sw_kschedule_refs; 136 spin_unlock(&swcr_spin); 137 explicit_kschedule = 0; 138 } 139 140 /* 141 * xforms that provide a reinit method perform all IV 142 * handling themselves. 143 */ 144 if (exf->reinit) 145 exf->reinit(kschedule, iv); 146 147 if (flags & CRYPTO_F_IMBUF) { 148 struct mbuf *m = (struct mbuf *) buf; 149 150 /* Find beginning of data */ 151 m = m_getptr(m, crd->crd_skip, &k); 152 if (m == NULL) { 153 error = EINVAL; 154 goto done; 155 } 156 157 i = crd->crd_len; 158 159 while (i > 0) { 160 /* 161 * If there's insufficient data at the end of 162 * an mbuf, we have to do some copying. 163 */ 164 if (m->m_len < k + blks && m->m_len != k) { 165 m_copydata(m, k, blks, blk); 166 167 /* Actual encryption/decryption */ 168 if (exf->reinit) { 169 if (crd->crd_flags & CRD_F_ENCRYPT) { 170 exf->encrypt(kschedule, 171 blk, iv); 172 } else { 173 exf->decrypt(kschedule, 174 blk, iv); 175 } 176 } else if (crd->crd_flags & CRD_F_ENCRYPT) { 177 /* XOR with previous block */ 178 for (j = 0; j < blks; j++) 179 blk[j] ^= ivp[j]; 180 181 exf->encrypt(kschedule, blk, iv); 182 183 /* 184 * Keep encrypted block for XOR'ing 185 * with next block 186 */ 187 bcopy(blk, iv, blks); 188 ivp = iv; 189 } else { /* decrypt */ 190 /* 191 * Keep encrypted block for XOR'ing 192 * with next block 193 */ 194 nivp = (ivp == iv) ? iv2 : iv; 195 bcopy(blk, nivp, blks); 196 197 exf->decrypt(kschedule, blk, iv); 198 199 /* XOR with previous block */ 200 for (j = 0; j < blks; j++) 201 blk[j] ^= ivp[j]; 202 203 ivp = nivp; 204 } 205 206 /* Copy back decrypted block */ 207 m_copyback(m, k, blks, blk); 208 209 /* Advance pointer */ 210 m = m_getptr(m, k + blks, &k); 211 if (m == NULL) { 212 error = EINVAL; 213 goto done; 214 } 215 216 i -= blks; 217 218 /* Could be done... */ 219 if (i == 0) 220 break; 221 } 222 223 /* Skip possibly empty mbufs */ 224 if (k == m->m_len) { 225 for (m = m->m_next; m && m->m_len == 0; 226 m = m->m_next) 227 ; 228 k = 0; 229 } 230 231 /* Sanity check */ 232 if (m == NULL) { 233 error = EINVAL; 234 goto done; 235 } 236 237 /* 238 * Warning: idat may point to garbage here, but 239 * we only use it in the while() loop, only if 240 * there are indeed enough data. 241 */ 242 idat = mtod(m, unsigned char *) + k; 243 244 while (m->m_len >= k + blks && i > 0) { 245 if (exf->reinit) { 246 if (crd->crd_flags & CRD_F_ENCRYPT) { 247 exf->encrypt(kschedule, 248 idat, iv); 249 } else { 250 exf->decrypt(kschedule, 251 idat, iv); 252 } 253 } else if (crd->crd_flags & CRD_F_ENCRYPT) { 254 /* XOR with previous block/IV */ 255 for (j = 0; j < blks; j++) 256 idat[j] ^= ivp[j]; 257 258 exf->encrypt(kschedule, idat, iv); 259 ivp = idat; 260 } else { /* decrypt */ 261 /* 262 * Keep encrypted block to be used 263 * in next block's processing. 264 */ 265 nivp = (ivp == iv) ? iv2 : iv; 266 bcopy(idat, nivp, blks); 267 268 exf->decrypt(kschedule, idat, iv); 269 270 /* XOR with previous block/IV */ 271 for (j = 0; j < blks; j++) 272 idat[j] ^= ivp[j]; 273 274 ivp = nivp; 275 } 276 277 idat += blks; 278 k += blks; 279 i -= blks; 280 } 281 } 282 error = 0; /* Done with mbuf encryption/decryption */ 283 } else if (flags & CRYPTO_F_IOV) { 284 struct uio *uio = (struct uio *) buf; 285 struct iovec *iov; 286 287 /* Find beginning of data */ 288 iov = cuio_getptr(uio, crd->crd_skip, &k); 289 if (iov == NULL) { 290 error = EINVAL; 291 goto done; 292 } 293 294 i = crd->crd_len; 295 296 while (i > 0) { 297 /* 298 * If there's insufficient data at the end of 299 * an iovec, we have to do some copying. 300 */ 301 if (iov->iov_len < k + blks && iov->iov_len != k) { 302 cuio_copydata(uio, k, blks, blk); 303 304 /* Actual encryption/decryption */ 305 if (exf->reinit) { 306 if (crd->crd_flags & CRD_F_ENCRYPT) { 307 exf->encrypt(kschedule, 308 blk, iv); 309 } else { 310 exf->decrypt(kschedule, 311 blk, iv); 312 } 313 } else if (crd->crd_flags & CRD_F_ENCRYPT) { 314 /* XOR with previous block */ 315 for (j = 0; j < blks; j++) 316 blk[j] ^= ivp[j]; 317 318 exf->encrypt(kschedule, blk, iv); 319 320 /* 321 * Keep encrypted block for XOR'ing 322 * with next block 323 */ 324 bcopy(blk, iv, blks); 325 ivp = iv; 326 } else { /* decrypt */ 327 /* 328 * Keep encrypted block for XOR'ing 329 * with next block 330 */ 331 nivp = (ivp == iv) ? iv2 : iv; 332 bcopy(blk, nivp, blks); 333 334 exf->decrypt(kschedule, blk, iv); 335 336 /* XOR with previous block */ 337 for (j = 0; j < blks; j++) 338 blk[j] ^= ivp[j]; 339 340 ivp = nivp; 341 } 342 343 /* Copy back decrypted block */ 344 cuio_copyback(uio, k, blks, blk); 345 346 /* Advance pointer */ 347 iov = cuio_getptr(uio, k + blks, &k); 348 if (iov == NULL) { 349 error = EINVAL; 350 goto done; 351 } 352 353 i -= blks; 354 355 /* Could be done... */ 356 if (i == 0) 357 break; 358 } 359 360 /* 361 * Warning: idat may point to garbage here, but 362 * we only use it in the while() loop, only if 363 * there are indeed enough data. 364 */ 365 idat = (char *)iov->iov_base + k; 366 367 while (iov->iov_len >= k + blks && i > 0) { 368 if (exf->reinit) { 369 if (crd->crd_flags & CRD_F_ENCRYPT) { 370 exf->encrypt(kschedule, 371 idat, iv); 372 } else { 373 exf->decrypt(kschedule, 374 idat, iv); 375 } 376 } else if (crd->crd_flags & CRD_F_ENCRYPT) { 377 /* XOR with previous block/IV */ 378 for (j = 0; j < blks; j++) 379 idat[j] ^= ivp[j]; 380 381 exf->encrypt(kschedule, idat, iv); 382 ivp = idat; 383 } else { /* decrypt */ 384 /* 385 * Keep encrypted block to be used 386 * in next block's processing. 387 */ 388 nivp = (ivp == iv) ? iv2 : iv; 389 bcopy(idat, nivp, blks); 390 391 exf->decrypt(kschedule, idat, iv); 392 393 /* XOR with previous block/IV */ 394 for (j = 0; j < blks; j++) 395 idat[j] ^= ivp[j]; 396 397 ivp = nivp; 398 } 399 400 idat += blks; 401 k += blks; 402 i -= blks; 403 } 404 if (k == iov->iov_len) { 405 iov++; 406 k = 0; 407 } 408 } 409 error = 0; /* Done with iovec encryption/decryption */ 410 } else { 411 /* 412 * contiguous buffer 413 */ 414 if (exf->reinit) { 415 for(i = crd->crd_skip; 416 i < crd->crd_skip + crd->crd_len; i += blks) { 417 if (crd->crd_flags & CRD_F_ENCRYPT) { 418 exf->encrypt(kschedule, buf + i, iv); 419 } else { 420 exf->decrypt(kschedule, buf + i, iv); 421 } 422 } 423 } else if (crd->crd_flags & CRD_F_ENCRYPT) { 424 for (i = crd->crd_skip; 425 i < crd->crd_skip + crd->crd_len; i += blks) { 426 /* XOR with the IV/previous block, as appropriate. */ 427 if (i == crd->crd_skip) 428 for (k = 0; k < blks; k++) 429 buf[i + k] ^= ivp[k]; 430 else 431 for (k = 0; k < blks; k++) 432 buf[i + k] ^= buf[i + k - blks]; 433 exf->encrypt(kschedule, buf + i, iv); 434 } 435 } else { /* Decrypt */ 436 /* 437 * Start at the end, so we don't need to keep the 438 * encrypted block as the IV for the next block. 439 */ 440 for (i = crd->crd_skip + crd->crd_len - blks; 441 i >= crd->crd_skip; i -= blks) { 442 exf->decrypt(kschedule, buf + i, iv); 443 444 /* XOR with the IV/previous block, as appropriate */ 445 if (i == crd->crd_skip) 446 for (k = 0; k < blks; k++) 447 buf[i + k] ^= ivp[k]; 448 else 449 for (k = 0; k < blks; k++) 450 buf[i + k] ^= buf[i + k - blks]; 451 } 452 } 453 error = 0; /* Done w/contiguous buffer encrypt/decrypt */ 454 } 455 done: 456 /* 457 * Cleanup - explicitly replace the session key if requested 458 * (horrible semantics for concurrent operation) 459 */ 460 if (explicit_kschedule) { 461 spin_lock(&swcr_spin); 462 if (sw->sw_kschedule && sw->sw_kschedule_refs == 0) { 463 okschedule = sw->sw_kschedule; 464 sw->sw_kschedule = kschedule; 465 } else { 466 okschedule = NULL; 467 } 468 spin_unlock(&swcr_spin); 469 if (okschedule) 470 exf->zerokey(&okschedule); 471 } else { 472 spin_lock(&swcr_spin); 473 --sw->sw_kschedule_refs; 474 spin_unlock(&swcr_spin); 475 } 476 return error; 477 } 478 479 static void 480 swcr_authprepare(struct auth_hash *axf, struct swcr_data *sw, u_char *key, 481 int klen) 482 { 483 int k; 484 485 klen /= 8; 486 487 switch (axf->type) { 488 case CRYPTO_MD5_HMAC: 489 case CRYPTO_SHA1_HMAC: 490 case CRYPTO_SHA2_256_HMAC: 491 case CRYPTO_SHA2_384_HMAC: 492 case CRYPTO_SHA2_512_HMAC: 493 case CRYPTO_NULL_HMAC: 494 case CRYPTO_RIPEMD160_HMAC: 495 for (k = 0; k < klen; k++) 496 key[k] ^= HMAC_IPAD_VAL; 497 498 axf->Init(sw->sw_ictx); 499 axf->Update(sw->sw_ictx, key, klen); 500 axf->Update(sw->sw_ictx, hmac_ipad_buffer, axf->blocksize - klen); 501 502 for (k = 0; k < klen; k++) 503 key[k] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL); 504 505 axf->Init(sw->sw_octx); 506 axf->Update(sw->sw_octx, key, klen); 507 axf->Update(sw->sw_octx, hmac_opad_buffer, axf->blocksize - klen); 508 509 for (k = 0; k < klen; k++) 510 key[k] ^= HMAC_OPAD_VAL; 511 break; 512 case CRYPTO_MD5_KPDK: 513 case CRYPTO_SHA1_KPDK: 514 { 515 /* We need a buffer that can hold an md5 and a sha1 result. */ 516 u_char buf[SHA1_RESULTLEN]; 517 518 sw->sw_klen = klen; 519 bcopy(key, sw->sw_octx, klen); 520 axf->Init(sw->sw_ictx); 521 axf->Update(sw->sw_ictx, key, klen); 522 axf->Final(buf, sw->sw_ictx); 523 break; 524 } 525 default: 526 kprintf("%s: CRD_F_KEY_EXPLICIT flag given, but algorithm %d " 527 "doesn't use keys.\n", __func__, axf->type); 528 } 529 } 530 531 /* 532 * Compute keyed-hash authenticator. 533 */ 534 static int 535 swcr_authcompute(struct cryptodesc *crd, struct swcr_data *sw, caddr_t buf, 536 int flags) 537 { 538 unsigned char aalg[HASH_MAX_LEN]; 539 struct auth_hash *axf; 540 union authctx ctx; 541 int err; 542 543 if (sw->sw_ictx == NULL) 544 return EINVAL; 545 546 axf = sw->sw_axf; 547 548 if (crd->crd_flags & CRD_F_KEY_EXPLICIT) 549 swcr_authprepare(axf, sw, crd->crd_key, crd->crd_klen); 550 551 bcopy(sw->sw_ictx, &ctx, axf->ctxsize); 552 553 err = crypto_apply(flags, buf, crd->crd_skip, crd->crd_len, 554 (int (*)(void *, void *, unsigned int))axf->Update, (caddr_t)&ctx); 555 if (err) 556 return err; 557 558 switch (sw->sw_alg) { 559 case CRYPTO_MD5_HMAC: 560 case CRYPTO_SHA1_HMAC: 561 case CRYPTO_SHA2_256_HMAC: 562 case CRYPTO_SHA2_384_HMAC: 563 case CRYPTO_SHA2_512_HMAC: 564 case CRYPTO_RIPEMD160_HMAC: 565 if (sw->sw_octx == NULL) 566 return EINVAL; 567 568 axf->Final(aalg, &ctx); 569 bcopy(sw->sw_octx, &ctx, axf->ctxsize); 570 axf->Update(&ctx, aalg, axf->hashsize); 571 axf->Final(aalg, &ctx); 572 break; 573 574 case CRYPTO_MD5_KPDK: 575 case CRYPTO_SHA1_KPDK: 576 if (sw->sw_octx == NULL) 577 return EINVAL; 578 579 axf->Update(&ctx, sw->sw_octx, sw->sw_klen); 580 axf->Final(aalg, &ctx); 581 break; 582 583 case CRYPTO_NULL_HMAC: 584 axf->Final(aalg, &ctx); 585 break; 586 } 587 588 /* Inject the authentication data */ 589 crypto_copyback(flags, buf, crd->crd_inject, 590 sw->sw_mlen == 0 ? axf->hashsize : sw->sw_mlen, aalg); 591 return 0; 592 } 593 594 /* 595 * Apply a combined encryption-authentication transformation 596 */ 597 static int 598 swcr_combined(struct cryptop *crp) 599 { 600 uint32_t blkbuf[howmany(EALG_MAX_BLOCK_LEN, sizeof(uint32_t))]; 601 u_char *blk = (u_char *)blkbuf; 602 u_char aalg[HASH_MAX_LEN]; 603 u_char iv[EALG_MAX_BLOCK_LEN]; 604 uint8_t *kschedule; 605 union authctx ctx; 606 struct cryptodesc *crd, *crda = NULL, *crde = NULL; 607 struct swcr_data *sw, *swa, *swe; 608 struct auth_hash *axf = NULL; 609 struct enc_xform *exf = NULL; 610 caddr_t buf = (caddr_t)crp->crp_buf; 611 uint32_t *blkp; 612 int i, blksz, ivlen, len; 613 614 blksz = 0; 615 ivlen = 0; 616 617 for (crd = crp->crp_desc; crd; crd = crd->crd_next) { 618 for (sw = swcr_sessions[crp->crp_sid & 0xffffffff]; 619 sw && sw->sw_alg != crd->crd_alg; 620 sw = sw->sw_next) 621 ; 622 if (sw == NULL) 623 return (EINVAL); 624 625 switch (sw->sw_alg) { 626 case CRYPTO_AES_GCM_16: 627 case CRYPTO_AES_GMAC: 628 swe = sw; 629 crde = crd; 630 exf = swe->sw_exf; 631 ivlen = exf->ivsize; 632 break; 633 case CRYPTO_AES_128_GMAC: 634 case CRYPTO_AES_192_GMAC: 635 case CRYPTO_AES_256_GMAC: 636 swa = sw; 637 crda = crd; 638 axf = swa->sw_axf; 639 if (swa->sw_ictx == NULL) 640 return (EINVAL); 641 bcopy(swa->sw_ictx, &ctx, axf->ctxsize); 642 blksz = axf->blocksize; 643 break; 644 default: 645 return (EINVAL); 646 } 647 } 648 if (crde == NULL || crda == NULL) 649 return (EINVAL); 650 651 /* Initialize the IV */ 652 if (crde->crd_flags & CRD_F_ENCRYPT) { 653 /* IV explicitly provided ? */ 654 if (crde->crd_flags & CRD_F_IV_EXPLICIT) 655 bcopy(crde->crd_iv, iv, ivlen); 656 else 657 karc4rand(iv, ivlen); 658 659 /* Do we need to write the IV */ 660 if (!(crde->crd_flags & CRD_F_IV_PRESENT)) 661 crypto_copyback(crde->crd_flags, buf, crde->crd_inject, 662 ivlen, iv); 663 664 } else { /* Decryption */ 665 /* IV explicitly provided ? */ 666 if (crde->crd_flags & CRD_F_IV_EXPLICIT) 667 bcopy(crde->crd_iv, iv, ivlen); 668 else 669 /* Get IV off buf */ 670 crypto_copydata(crde->crd_flags, buf, crde->crd_inject, 671 ivlen, iv); 672 } 673 674 /* Supply MAC with IV */ 675 if (axf->Reinit) 676 axf->Reinit(&ctx, iv, ivlen); 677 678 /* Supply MAC with AAD */ 679 for (i = 0; i < crda->crd_len; i += blksz) { 680 len = MIN(crda->crd_len - i, blksz); 681 crypto_copydata(crde->crd_flags, buf, crda->crd_skip + i, len, 682 blk); 683 axf->Update(&ctx, blk, len); 684 } 685 686 spin_lock(&swcr_spin); 687 kschedule = sw->sw_kschedule; 688 ++sw->sw_kschedule_refs; 689 spin_unlock(&swcr_spin); 690 691 if (exf->reinit) 692 exf->reinit(kschedule, iv); 693 694 /* Do encryption/decryption with MAC */ 695 for (i = 0; i < crde->crd_len; i += blksz) { 696 len = MIN(crde->crd_len - i, blksz); 697 if (len < blksz) 698 bzero(blk, blksz); 699 crypto_copydata(crde->crd_flags, buf, crde->crd_skip + i, len, 700 blk); 701 if (crde->crd_flags & CRD_F_ENCRYPT) { 702 exf->encrypt(kschedule, blk, iv); 703 axf->Update(&ctx, blk, len); 704 } else { 705 axf->Update(&ctx, blk, len); 706 exf->decrypt(kschedule, blk, iv); 707 } 708 crypto_copyback(crde->crd_flags, buf, crde->crd_skip + i, len, 709 blk); 710 } 711 712 /* Do any required special finalization */ 713 switch (crda->crd_alg) { 714 case CRYPTO_AES_128_GMAC: 715 case CRYPTO_AES_192_GMAC: 716 case CRYPTO_AES_256_GMAC: 717 /* length block */ 718 bzero(blk, blksz); 719 blkp = (uint32_t *)blk + 1; 720 *blkp = htobe32(crda->crd_len * 8); 721 blkp = (uint32_t *)blk + 3; 722 *blkp = htobe32(crde->crd_len * 8); 723 axf->Update(&ctx, blk, blksz); 724 break; 725 } 726 727 /* Finalize MAC */ 728 axf->Final(aalg, &ctx); 729 730 /* Inject the authentication data */ 731 crypto_copyback(crda->crd_flags, crp->crp_buf, crda->crd_inject, 732 axf->blocksize, aalg); 733 734 spin_lock(&swcr_spin); 735 --sw->sw_kschedule_refs; 736 spin_unlock(&swcr_spin); 737 738 return (0); 739 } 740 741 /* 742 * Apply a compression/decompression algorithm 743 */ 744 static int 745 swcr_compdec(struct cryptodesc *crd, struct swcr_data *sw, 746 caddr_t buf, int flags) 747 { 748 u_int8_t *data, *out; 749 struct comp_algo *cxf; 750 int adj; 751 u_int32_t result; 752 753 cxf = sw->sw_cxf; 754 755 /* 756 * We must handle the whole buffer of data in one time 757 * then if there is not all the data in the mbuf, we must 758 * copy in a buffer. 759 */ 760 data = kmalloc(crd->crd_len, M_CRYPTO_DATA, M_INTWAIT); 761 crypto_copydata(flags, buf, crd->crd_skip, crd->crd_len, data); 762 763 if (crd->crd_flags & CRD_F_COMP) 764 result = cxf->compress(data, crd->crd_len, &out); 765 else 766 result = cxf->decompress(data, crd->crd_len, &out); 767 768 kfree(data, M_CRYPTO_DATA); 769 if (result == 0) 770 return EINVAL; 771 772 /* Copy back the (de)compressed data. m_copyback is 773 * extending the mbuf as necessary. 774 */ 775 sw->sw_size = result; 776 /* Check the compressed size when doing compression */ 777 if (crd->crd_flags & CRD_F_COMP) { 778 if (result >= crd->crd_len) { 779 /* Compression was useless, we lost time */ 780 kfree(out, M_CRYPTO_DATA); 781 return 0; 782 } 783 } 784 785 crypto_copyback(flags, buf, crd->crd_skip, result, out); 786 if (result < crd->crd_len) { 787 adj = result - crd->crd_len; 788 if (flags & CRYPTO_F_IMBUF) { 789 adj = result - crd->crd_len; 790 m_adj((struct mbuf *)buf, adj); 791 } else if (flags & CRYPTO_F_IOV) { 792 struct uio *uio = (struct uio *)buf; 793 int ind; 794 795 adj = crd->crd_len - result; 796 ind = uio->uio_iovcnt - 1; 797 798 while (adj > 0 && ind >= 0) { 799 if (adj < uio->uio_iov[ind].iov_len) { 800 uio->uio_iov[ind].iov_len -= adj; 801 break; 802 } 803 804 adj -= uio->uio_iov[ind].iov_len; 805 uio->uio_iov[ind].iov_len = 0; 806 ind--; 807 uio->uio_iovcnt--; 808 } 809 } 810 } 811 kfree(out, M_CRYPTO_DATA); 812 return 0; 813 } 814 815 /* 816 * Generate a new software session. 817 */ 818 static int 819 swcr_newsession(device_t dev, u_int32_t *sid, struct cryptoini *cri) 820 { 821 struct swcr_data *swd_base; 822 struct swcr_data **swd; 823 struct swcr_data **oswd; 824 struct auth_hash *axf; 825 struct enc_xform *txf; 826 struct comp_algo *cxf; 827 u_int32_t i; 828 u_int32_t n; 829 int error; 830 831 if (sid == NULL || cri == NULL) 832 return EINVAL; 833 834 swd_base = NULL; 835 swd = &swd_base; 836 837 while (cri) { 838 *swd = kmalloc(sizeof(struct swcr_data), 839 M_CRYPTO_DATA, M_WAITOK | M_ZERO); 840 841 switch (cri->cri_alg) { 842 case CRYPTO_DES_CBC: 843 txf = &enc_xform_des; 844 goto enccommon; 845 case CRYPTO_3DES_CBC: 846 txf = &enc_xform_3des; 847 goto enccommon; 848 case CRYPTO_BLF_CBC: 849 txf = &enc_xform_blf; 850 goto enccommon; 851 case CRYPTO_CAST_CBC: 852 txf = &enc_xform_cast5; 853 goto enccommon; 854 case CRYPTO_SKIPJACK_CBC: 855 txf = &enc_xform_skipjack; 856 goto enccommon; 857 case CRYPTO_RIJNDAEL128_CBC: 858 txf = &enc_xform_rijndael128; 859 goto enccommon; 860 case CRYPTO_AES_XTS: 861 txf = &enc_xform_aes_xts; 862 goto enccommon; 863 case CRYPTO_AES_CTR: 864 txf = &enc_xform_aes_ctr; 865 goto enccommon; 866 case CRYPTO_AES_GCM_16: 867 txf = &enc_xform_aes_gcm; 868 goto enccommon; 869 case CRYPTO_AES_GMAC: 870 txf = &enc_xform_aes_gmac; 871 (*swd)->sw_exf = txf; 872 break; 873 case CRYPTO_CAMELLIA_CBC: 874 txf = &enc_xform_camellia; 875 goto enccommon; 876 case CRYPTO_TWOFISH_CBC: 877 txf = &enc_xform_twofish; 878 goto enccommon; 879 case CRYPTO_SERPENT_CBC: 880 txf = &enc_xform_serpent; 881 goto enccommon; 882 case CRYPTO_TWOFISH_XTS: 883 txf = &enc_xform_twofish_xts; 884 goto enccommon; 885 case CRYPTO_SERPENT_XTS: 886 txf = &enc_xform_serpent_xts; 887 goto enccommon; 888 case CRYPTO_NULL_CBC: 889 txf = &enc_xform_null; 890 goto enccommon; 891 enccommon: 892 if (cri->cri_key != NULL) { 893 error = txf->setkey(&((*swd)->sw_kschedule), 894 cri->cri_key, 895 cri->cri_klen / 8); 896 if (error) { 897 swcr_freesession_slot(&swd_base, 0); 898 return error; 899 } 900 } 901 (*swd)->sw_exf = txf; 902 break; 903 904 case CRYPTO_MD5_HMAC: 905 axf = &auth_hash_hmac_md5; 906 goto authcommon; 907 case CRYPTO_SHA1_HMAC: 908 axf = &auth_hash_hmac_sha1; 909 goto authcommon; 910 case CRYPTO_SHA2_256_HMAC: 911 axf = &auth_hash_hmac_sha2_256; 912 goto authcommon; 913 case CRYPTO_SHA2_384_HMAC: 914 axf = &auth_hash_hmac_sha2_384; 915 goto authcommon; 916 case CRYPTO_SHA2_512_HMAC: 917 axf = &auth_hash_hmac_sha2_512; 918 goto authcommon; 919 case CRYPTO_NULL_HMAC: 920 axf = &auth_hash_null; 921 goto authcommon; 922 case CRYPTO_RIPEMD160_HMAC: 923 axf = &auth_hash_hmac_ripemd_160; 924 authcommon: 925 (*swd)->sw_ictx = kmalloc(axf->ctxsize, M_CRYPTO_DATA, 926 M_WAITOK); 927 928 (*swd)->sw_octx = kmalloc(axf->ctxsize, M_CRYPTO_DATA, 929 M_WAITOK); 930 931 if (cri->cri_key != NULL) { 932 swcr_authprepare(axf, *swd, cri->cri_key, 933 cri->cri_klen); 934 } 935 936 (*swd)->sw_mlen = cri->cri_mlen; 937 (*swd)->sw_axf = axf; 938 break; 939 940 case CRYPTO_MD5_KPDK: 941 axf = &auth_hash_key_md5; 942 goto auth2common; 943 944 case CRYPTO_SHA1_KPDK: 945 axf = &auth_hash_key_sha1; 946 auth2common: 947 (*swd)->sw_ictx = kmalloc(axf->ctxsize, M_CRYPTO_DATA, 948 M_WAITOK); 949 950 (*swd)->sw_octx = kmalloc(cri->cri_klen / 8, 951 M_CRYPTO_DATA, M_WAITOK); 952 953 /* Store the key so we can "append" it to the payload */ 954 if (cri->cri_key != NULL) { 955 swcr_authprepare(axf, *swd, cri->cri_key, 956 cri->cri_klen); 957 } 958 959 (*swd)->sw_mlen = cri->cri_mlen; 960 (*swd)->sw_axf = axf; 961 break; 962 #ifdef notdef 963 case CRYPTO_MD5: 964 axf = &auth_hash_md5; 965 goto auth3common; 966 967 case CRYPTO_SHA1: 968 axf = &auth_hash_sha1; 969 auth3common: 970 (*swd)->sw_ictx = kmalloc(axf->ctxsize, M_CRYPTO_DATA, 971 M_WAITOK); 972 973 axf->Init((*swd)->sw_ictx); 974 (*swd)->sw_mlen = cri->cri_mlen; 975 (*swd)->sw_axf = axf; 976 break; 977 #endif 978 case CRYPTO_AES_128_GMAC: 979 axf = &auth_hash_gmac_aes_128; 980 goto auth4common; 981 982 case CRYPTO_AES_192_GMAC: 983 axf = &auth_hash_gmac_aes_192; 984 goto auth4common; 985 986 case CRYPTO_AES_256_GMAC: 987 axf = &auth_hash_gmac_aes_256; 988 auth4common: 989 (*swd)->sw_ictx = kmalloc(axf->ctxsize, M_CRYPTO_DATA, 990 M_NOWAIT); 991 if ((*swd)->sw_ictx == NULL) { 992 swcr_freesession_slot(&swd_base, 0); 993 return ENOBUFS; 994 } 995 996 axf->Init((*swd)->sw_ictx); 997 axf->Setkey((*swd)->sw_ictx, cri->cri_key, 998 cri->cri_klen / 8); 999 (*swd)->sw_axf = axf; 1000 break; 1001 1002 case CRYPTO_DEFLATE_COMP: 1003 cxf = &comp_algo_deflate; 1004 (*swd)->sw_cxf = cxf; 1005 break; 1006 default: 1007 swcr_freesession_slot(&swd_base, 0); 1008 return EINVAL; 1009 } 1010 1011 (*swd)->sw_alg = cri->cri_alg; 1012 cri = cri->cri_next; 1013 swd = &((*swd)->sw_next); 1014 } 1015 1016 for (;;) { 1017 /* 1018 * Atomically allocate a session 1019 */ 1020 spin_lock(&swcr_spin); 1021 for (i = swcr_minsesnum; i < swcr_sesnum; ++i) { 1022 if (swcr_sessions[i] == NULL) 1023 break; 1024 } 1025 if (i < swcr_sesnum) { 1026 swcr_sessions[i] = swd_base; 1027 swcr_minsesnum = i + 1; 1028 spin_unlock(&swcr_spin); 1029 break; 1030 } 1031 n = swcr_sesnum; 1032 spin_unlock(&swcr_spin); 1033 1034 /* 1035 * A larger allocation is required, reallocate the array 1036 * and replace, checking for SMP races. 1037 */ 1038 if (n < CRYPTO_SW_SESSIONS) 1039 n = CRYPTO_SW_SESSIONS; 1040 else 1041 n = n * 3 / 2; 1042 swd = kmalloc(n * sizeof(struct swcr_data *), 1043 M_CRYPTO_DATA, M_WAITOK | M_ZERO); 1044 1045 spin_lock(&swcr_spin); 1046 if (swcr_sesnum >= n) { 1047 spin_unlock(&swcr_spin); 1048 kfree(swd, M_CRYPTO_DATA); 1049 } else if (swcr_sesnum) { 1050 bcopy(swcr_sessions, swd, 1051 swcr_sesnum * sizeof(struct swcr_data *)); 1052 oswd = swcr_sessions; 1053 swcr_sessions = swd; 1054 swcr_sesnum = n; 1055 spin_unlock(&swcr_spin); 1056 kfree(oswd, M_CRYPTO_DATA); 1057 } else { 1058 swcr_sessions = swd; 1059 swcr_sesnum = n; 1060 spin_unlock(&swcr_spin); 1061 } 1062 } 1063 1064 *sid = i; 1065 return 0; 1066 } 1067 1068 /* 1069 * Free a session. 1070 */ 1071 static int 1072 swcr_freesession(device_t dev, u_int64_t tid) 1073 { 1074 u_int32_t sid = CRYPTO_SESID2LID(tid); 1075 1076 if (sid > swcr_sesnum || swcr_sessions == NULL || 1077 swcr_sessions[sid] == NULL) { 1078 return EINVAL; 1079 } 1080 1081 /* Silently accept and return */ 1082 if (sid == 0) 1083 return 0; 1084 1085 return(swcr_freesession_slot(&swcr_sessions[sid], sid)); 1086 } 1087 1088 static 1089 int 1090 swcr_freesession_slot(struct swcr_data **swdp, u_int32_t sid) 1091 { 1092 struct enc_xform *txf; 1093 struct auth_hash *axf; 1094 struct swcr_data *swd; 1095 struct swcr_data *swnext; 1096 1097 /* 1098 * Protect session detachment with the spinlock. 1099 */ 1100 spin_lock(&swcr_spin); 1101 swnext = *swdp; 1102 *swdp = NULL; 1103 if (sid && swcr_minsesnum > sid) 1104 swcr_minsesnum = sid; 1105 spin_unlock(&swcr_spin); 1106 1107 /* 1108 * Clean up at our leisure. 1109 */ 1110 while ((swd = swnext) != NULL) { 1111 swnext = swd->sw_next; 1112 1113 swd->sw_next = NULL; 1114 1115 switch (swd->sw_alg) { 1116 case CRYPTO_DES_CBC: 1117 case CRYPTO_3DES_CBC: 1118 case CRYPTO_BLF_CBC: 1119 case CRYPTO_CAST_CBC: 1120 case CRYPTO_SKIPJACK_CBC: 1121 case CRYPTO_RIJNDAEL128_CBC: 1122 case CRYPTO_AES_XTS: 1123 case CRYPTO_AES_CTR: 1124 case CRYPTO_AES_GCM_16: 1125 case CRYPTO_AES_GMAC: 1126 case CRYPTO_CAMELLIA_CBC: 1127 case CRYPTO_TWOFISH_CBC: 1128 case CRYPTO_SERPENT_CBC: 1129 case CRYPTO_TWOFISH_XTS: 1130 case CRYPTO_SERPENT_XTS: 1131 case CRYPTO_NULL_CBC: 1132 txf = swd->sw_exf; 1133 1134 if (swd->sw_kschedule) 1135 txf->zerokey(&(swd->sw_kschedule)); 1136 break; 1137 1138 case CRYPTO_MD5_HMAC: 1139 case CRYPTO_SHA1_HMAC: 1140 case CRYPTO_SHA2_256_HMAC: 1141 case CRYPTO_SHA2_384_HMAC: 1142 case CRYPTO_SHA2_512_HMAC: 1143 case CRYPTO_RIPEMD160_HMAC: 1144 case CRYPTO_NULL_HMAC: 1145 axf = swd->sw_axf; 1146 1147 if (swd->sw_ictx) { 1148 bzero(swd->sw_ictx, axf->ctxsize); 1149 kfree(swd->sw_ictx, M_CRYPTO_DATA); 1150 } 1151 if (swd->sw_octx) { 1152 bzero(swd->sw_octx, axf->ctxsize); 1153 kfree(swd->sw_octx, M_CRYPTO_DATA); 1154 } 1155 break; 1156 1157 case CRYPTO_MD5_KPDK: 1158 case CRYPTO_SHA1_KPDK: 1159 axf = swd->sw_axf; 1160 1161 if (swd->sw_ictx) { 1162 bzero(swd->sw_ictx, axf->ctxsize); 1163 kfree(swd->sw_ictx, M_CRYPTO_DATA); 1164 } 1165 if (swd->sw_octx) { 1166 bzero(swd->sw_octx, swd->sw_klen); 1167 kfree(swd->sw_octx, M_CRYPTO_DATA); 1168 } 1169 break; 1170 1171 case CRYPTO_AES_128_GMAC: 1172 case CRYPTO_AES_192_GMAC: 1173 case CRYPTO_AES_256_GMAC: 1174 case CRYPTO_MD5: 1175 case CRYPTO_SHA1: 1176 axf = swd->sw_axf; 1177 1178 if (swd->sw_ictx) { 1179 bzero(swd->sw_ictx, axf->ctxsize); 1180 kfree(swd->sw_ictx, M_CRYPTO_DATA); 1181 } 1182 break; 1183 1184 case CRYPTO_DEFLATE_COMP: 1185 break; 1186 } 1187 1188 //FREE(swd, M_CRYPTO_DATA); 1189 kfree(swd, M_CRYPTO_DATA); 1190 } 1191 return 0; 1192 } 1193 1194 /* 1195 * Process a software request. 1196 */ 1197 static int 1198 swcr_process(device_t dev, struct cryptop *crp, int hint) 1199 { 1200 struct cryptodesc *crd; 1201 struct swcr_data *sw; 1202 u_int32_t lid; 1203 1204 /* Sanity check */ 1205 if (crp == NULL) 1206 return EINVAL; 1207 1208 if (crp->crp_desc == NULL || crp->crp_buf == NULL) { 1209 crp->crp_etype = EINVAL; 1210 goto done; 1211 } 1212 1213 lid = crp->crp_sid & 0xffffffff; 1214 if (lid >= swcr_sesnum || lid == 0 || swcr_sessions[lid] == NULL) { 1215 crp->crp_etype = ENOENT; 1216 goto done; 1217 } 1218 1219 /* Go through crypto descriptors, processing as we go */ 1220 for (crd = crp->crp_desc; crd; crd = crd->crd_next) { 1221 /* 1222 * Find the crypto context. 1223 * 1224 * XXX Note that the logic here prevents us from having 1225 * XXX the same algorithm multiple times in a session 1226 * XXX (or rather, we can but it won't give us the right 1227 * XXX results). To do that, we'd need some way of differentiating 1228 * XXX between the various instances of an algorithm (so we can 1229 * XXX locate the correct crypto context). 1230 */ 1231 for (sw = swcr_sessions[lid]; 1232 sw && sw->sw_alg != crd->crd_alg; 1233 sw = sw->sw_next) 1234 ; 1235 1236 /* No such context ? */ 1237 if (sw == NULL) { 1238 crp->crp_etype = EINVAL; 1239 goto done; 1240 } 1241 switch (sw->sw_alg) { 1242 case CRYPTO_DES_CBC: 1243 case CRYPTO_3DES_CBC: 1244 case CRYPTO_BLF_CBC: 1245 case CRYPTO_CAST_CBC: 1246 case CRYPTO_SKIPJACK_CBC: 1247 case CRYPTO_RIJNDAEL128_CBC: 1248 case CRYPTO_AES_XTS: 1249 case CRYPTO_AES_CTR: 1250 case CRYPTO_CAMELLIA_CBC: 1251 case CRYPTO_TWOFISH_CBC: 1252 case CRYPTO_SERPENT_CBC: 1253 case CRYPTO_TWOFISH_XTS: 1254 case CRYPTO_SERPENT_XTS: 1255 if ((crp->crp_etype = swcr_encdec(crd, sw, 1256 crp->crp_buf, crp->crp_flags)) != 0) 1257 goto done; 1258 break; 1259 case CRYPTO_NULL_CBC: 1260 crp->crp_etype = 0; 1261 break; 1262 case CRYPTO_MD5_HMAC: 1263 case CRYPTO_SHA1_HMAC: 1264 case CRYPTO_SHA2_256_HMAC: 1265 case CRYPTO_SHA2_384_HMAC: 1266 case CRYPTO_SHA2_512_HMAC: 1267 case CRYPTO_RIPEMD160_HMAC: 1268 case CRYPTO_NULL_HMAC: 1269 case CRYPTO_MD5_KPDK: 1270 case CRYPTO_SHA1_KPDK: 1271 case CRYPTO_MD5: 1272 case CRYPTO_SHA1: 1273 if ((crp->crp_etype = swcr_authcompute(crd, sw, 1274 crp->crp_buf, crp->crp_flags)) != 0) 1275 goto done; 1276 break; 1277 1278 case CRYPTO_AES_GCM_16: 1279 case CRYPTO_AES_GMAC: 1280 case CRYPTO_AES_128_GMAC: 1281 case CRYPTO_AES_192_GMAC: 1282 case CRYPTO_AES_256_GMAC: 1283 crp->crp_etype = swcr_combined(crp); 1284 goto done; 1285 1286 case CRYPTO_DEFLATE_COMP: 1287 if ((crp->crp_etype = swcr_compdec(crd, sw, 1288 crp->crp_buf, crp->crp_flags)) != 0) 1289 goto done; 1290 else 1291 crp->crp_olen = (int)sw->sw_size; 1292 break; 1293 1294 default: 1295 /* Unknown/unsupported algorithm */ 1296 crp->crp_etype = EINVAL; 1297 goto done; 1298 } 1299 } 1300 1301 done: 1302 crypto_done(crp); 1303 lwkt_yield(); 1304 return 0; 1305 } 1306 1307 static void 1308 swcr_identify(driver_t *drv, device_t parent) 1309 { 1310 /* NB: order 10 is so we get attached after h/w devices */ 1311 /* XXX: wouldn't bet about this BUS_ADD_CHILD correctness */ 1312 if (device_find_child(parent, "cryptosoft", -1) == NULL && 1313 BUS_ADD_CHILD(parent, parent, 10, "cryptosoft", -1) == 0) 1314 panic("cryptosoft: could not attach"); 1315 } 1316 1317 static int 1318 swcr_probe(device_t dev) 1319 { 1320 device_set_desc(dev, "software crypto"); 1321 return (0); 1322 } 1323 1324 static int 1325 swcr_attach(device_t dev) 1326 { 1327 memset(hmac_ipad_buffer, HMAC_IPAD_VAL, HMAC_MAX_BLOCK_LEN); 1328 memset(hmac_opad_buffer, HMAC_OPAD_VAL, HMAC_MAX_BLOCK_LEN); 1329 1330 swcr_id = crypto_get_driverid(dev, CRYPTOCAP_F_SOFTWARE | 1331 CRYPTOCAP_F_SYNC | 1332 CRYPTOCAP_F_SMP); 1333 if (swcr_id < 0) { 1334 device_printf(dev, "cannot initialize!"); 1335 return ENOMEM; 1336 } 1337 #define REGISTER(alg) \ 1338 crypto_register(swcr_id, alg, 0,0) 1339 REGISTER(CRYPTO_DES_CBC); 1340 REGISTER(CRYPTO_3DES_CBC); 1341 REGISTER(CRYPTO_BLF_CBC); 1342 REGISTER(CRYPTO_CAST_CBC); 1343 REGISTER(CRYPTO_SKIPJACK_CBC); 1344 REGISTER(CRYPTO_NULL_CBC); 1345 REGISTER(CRYPTO_MD5_HMAC); 1346 REGISTER(CRYPTO_SHA1_HMAC); 1347 REGISTER(CRYPTO_SHA2_256_HMAC); 1348 REGISTER(CRYPTO_SHA2_384_HMAC); 1349 REGISTER(CRYPTO_SHA2_512_HMAC); 1350 REGISTER(CRYPTO_RIPEMD160_HMAC); 1351 REGISTER(CRYPTO_NULL_HMAC); 1352 REGISTER(CRYPTO_MD5_KPDK); 1353 REGISTER(CRYPTO_SHA1_KPDK); 1354 REGISTER(CRYPTO_MD5); 1355 REGISTER(CRYPTO_SHA1); 1356 REGISTER(CRYPTO_RIJNDAEL128_CBC); 1357 REGISTER(CRYPTO_AES_XTS); 1358 REGISTER(CRYPTO_AES_CTR); 1359 REGISTER(CRYPTO_AES_GCM_16); 1360 REGISTER(CRYPTO_AES_GMAC); 1361 REGISTER(CRYPTO_AES_128_GMAC); 1362 REGISTER(CRYPTO_AES_192_GMAC); 1363 REGISTER(CRYPTO_AES_256_GMAC); 1364 REGISTER(CRYPTO_CAMELLIA_CBC); 1365 REGISTER(CRYPTO_TWOFISH_CBC); 1366 REGISTER(CRYPTO_SERPENT_CBC); 1367 REGISTER(CRYPTO_TWOFISH_XTS); 1368 REGISTER(CRYPTO_SERPENT_XTS); 1369 REGISTER(CRYPTO_DEFLATE_COMP); 1370 #undef REGISTER 1371 1372 return 0; 1373 } 1374 1375 static int 1376 swcr_detach(device_t dev) 1377 { 1378 crypto_unregister_all(swcr_id); 1379 if (swcr_sessions != NULL) 1380 kfree(swcr_sessions, M_CRYPTO_DATA); 1381 return 0; 1382 } 1383 1384 static device_method_t swcr_methods[] = { 1385 DEVMETHOD(device_identify, swcr_identify), 1386 DEVMETHOD(device_probe, swcr_probe), 1387 DEVMETHOD(device_attach, swcr_attach), 1388 DEVMETHOD(device_detach, swcr_detach), 1389 1390 DEVMETHOD(cryptodev_newsession, swcr_newsession), 1391 DEVMETHOD(cryptodev_freesession,swcr_freesession), 1392 DEVMETHOD(cryptodev_process, swcr_process), 1393 1394 DEVMETHOD_END 1395 }; 1396 1397 static driver_t swcr_driver = { 1398 "cryptosoft", 1399 swcr_methods, 1400 0, /* NB: no softc */ 1401 }; 1402 static devclass_t swcr_devclass; 1403 1404 /* 1405 * NB: We explicitly reference the crypto module so we 1406 * get the necessary ordering when built as a loadable 1407 * module. This is required because we bundle the crypto 1408 * module code together with the cryptosoft driver (otherwise 1409 * normal module dependencies would handle things). 1410 */ 1411 extern int crypto_modevent(struct module *, int, void *); 1412 /* XXX where to attach */ 1413 DRIVER_MODULE(cryptosoft, nexus, swcr_driver, swcr_devclass, crypto_modevent,NULL); 1414 MODULE_VERSION(cryptosoft, 1); 1415 MODULE_DEPEND(cryptosoft, crypto, 1, 1, 1); 1416