| 1 | /* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.4 2003/06/03 00:09:02 sam Exp $ */ |
| 2 | /* $DragonFly: src/sys/opencrypto/cryptodev.c,v 1.23 2008/01/06 16:55:53 swildner Exp $ */ |
| 3 | /* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */ |
| 4 | |
| 5 | /* |
| 6 | * Copyright (c) 2001 Theo de Raadt |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. The name of the author may not be used to endorse or promote products |
| 18 | * derived from this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 21 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 22 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 23 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 24 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 25 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 29 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | * |
| 31 | * Effort sponsored in part by the Defense Advanced Research Projects |
| 32 | * Agency (DARPA) and Air Force Research Laboratory, Air Force |
| 33 | * Materiel Command, USAF, under agreement number F30602-01-2-0537. |
| 34 | * |
| 35 | */ |
| 36 | |
| 37 | #include <sys/param.h> |
| 38 | #include <sys/systm.h> |
| 39 | #include <sys/malloc.h> |
| 40 | #include <sys/mbuf.h> |
| 41 | #include <sys/sysctl.h> |
| 42 | #include <sys/file.h> |
| 43 | #include <sys/lock.h> |
| 44 | #include <sys/filedesc.h> |
| 45 | #include <sys/errno.h> |
| 46 | #include <sys/uio.h> |
| 47 | #include <sys/random.h> |
| 48 | #include <sys/conf.h> |
| 49 | #include <sys/device.h> |
| 50 | #include <sys/kernel.h> |
| 51 | #include <sys/fcntl.h> |
| 52 | #include <sys/proc.h> |
| 53 | #include <sys/file2.h> |
| 54 | #include <sys/thread2.h> |
| 55 | |
| 56 | #include <opencrypto/cryptodev.h> |
| 57 | #include <opencrypto/xform.h> |
| 58 | |
| 59 | struct csession { |
| 60 | TAILQ_ENTRY(csession) next; |
| 61 | u_int64_t sid; |
| 62 | u_int32_t ses; |
| 63 | |
| 64 | u_int32_t cipher; |
| 65 | struct enc_xform *txform; |
| 66 | u_int32_t mac; |
| 67 | struct auth_hash *thash; |
| 68 | |
| 69 | caddr_t key; |
| 70 | int keylen; |
| 71 | u_char tmp_iv[EALG_MAX_BLOCK_LEN]; |
| 72 | |
| 73 | caddr_t mackey; |
| 74 | int mackeylen; |
| 75 | u_char tmp_mac[CRYPTO_MAX_MAC_LEN]; |
| 76 | |
| 77 | struct iovec iovec[UIO_MAXIOV]; |
| 78 | struct uio uio; |
| 79 | int error; |
| 80 | }; |
| 81 | |
| 82 | struct fcrypt { |
| 83 | TAILQ_HEAD(csessionlist, csession) csessions; |
| 84 | int sesn; |
| 85 | }; |
| 86 | |
| 87 | static int cryptof_rw(struct file *fp, struct uio *uio, |
| 88 | struct ucred *cred, int flags); |
| 89 | static int cryptof_ioctl(struct file *, u_long, caddr_t, struct ucred *); |
| 90 | static int cryptof_poll(struct file *, int, struct ucred *); |
| 91 | static int cryptof_kqfilter(struct file *, struct knote *); |
| 92 | static int cryptof_stat(struct file *, struct stat *, struct ucred *); |
| 93 | static int cryptof_close(struct file *); |
| 94 | |
| 95 | static struct fileops cryptofops = { |
| 96 | .fo_read = cryptof_rw, |
| 97 | .fo_write = cryptof_rw, |
| 98 | .fo_ioctl = cryptof_ioctl, |
| 99 | .fo_poll = cryptof_poll, |
| 100 | .fo_kqfilter = cryptof_kqfilter, |
| 101 | .fo_stat = cryptof_stat, |
| 102 | .fo_close = cryptof_close, |
| 103 | .fo_shutdown = nofo_shutdown |
| 104 | }; |
| 105 | |
| 106 | static struct csession *csefind(struct fcrypt *, u_int); |
| 107 | static int csedelete(struct fcrypt *, struct csession *); |
| 108 | static struct csession *cseadd(struct fcrypt *, struct csession *); |
| 109 | static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t, |
| 110 | u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *, |
| 111 | struct auth_hash *); |
| 112 | static int csefree(struct csession *); |
| 113 | |
| 114 | static int cryptodev_op(struct csession *, struct crypt_op *); |
| 115 | static int cryptodev_key(struct crypt_kop *); |
| 116 | |
| 117 | /* |
| 118 | * MPSAFE |
| 119 | */ |
| 120 | static int |
| 121 | cryptof_rw( |
| 122 | struct file *fp, |
| 123 | struct uio *uio, |
| 124 | struct ucred *active_cred, |
| 125 | int flags) |
| 126 | { |
| 127 | return (EIO); |
| 128 | } |
| 129 | |
| 130 | /* |
| 131 | * MPALMOSTSAFE - acquires mplock |
| 132 | */ |
| 133 | static int |
| 134 | cryptof_ioctl( |
| 135 | struct file *fp, |
| 136 | u_long cmd, |
| 137 | caddr_t data, |
| 138 | struct ucred *cred) |
| 139 | { |
| 140 | struct cryptoini cria, crie; |
| 141 | struct fcrypt *fcr; |
| 142 | struct csession *cse; |
| 143 | struct session_op *sop; |
| 144 | struct crypt_op *cop; |
| 145 | struct enc_xform *txform = NULL; |
| 146 | struct auth_hash *thash = NULL; |
| 147 | u_int64_t sid; |
| 148 | u_int32_t ses; |
| 149 | int error = 0; |
| 150 | |
| 151 | get_mplock(); |
| 152 | fcr = (struct fcrypt *)fp->f_data; |
| 153 | |
| 154 | switch (cmd) { |
| 155 | case CIOCGSESSION: |
| 156 | sop = (struct session_op *)data; |
| 157 | switch (sop->cipher) { |
| 158 | case 0: |
| 159 | break; |
| 160 | case CRYPTO_DES_CBC: |
| 161 | txform = &enc_xform_des; |
| 162 | break; |
| 163 | case CRYPTO_3DES_CBC: |
| 164 | txform = &enc_xform_3des; |
| 165 | break; |
| 166 | case CRYPTO_BLF_CBC: |
| 167 | txform = &enc_xform_blf; |
| 168 | break; |
| 169 | case CRYPTO_CAST_CBC: |
| 170 | txform = &enc_xform_cast5; |
| 171 | break; |
| 172 | case CRYPTO_SKIPJACK_CBC: |
| 173 | txform = &enc_xform_skipjack; |
| 174 | break; |
| 175 | case CRYPTO_AES_CBC: |
| 176 | txform = &enc_xform_rijndael128; |
| 177 | break; |
| 178 | case CRYPTO_NULL_CBC: |
| 179 | txform = &enc_xform_null; |
| 180 | break; |
| 181 | case CRYPTO_ARC4: |
| 182 | txform = &enc_xform_arc4; |
| 183 | break; |
| 184 | default: |
| 185 | error = EINVAL; |
| 186 | break; |
| 187 | } |
| 188 | if (error) |
| 189 | break; |
| 190 | |
| 191 | switch (sop->mac) { |
| 192 | case 0: |
| 193 | break; |
| 194 | case CRYPTO_MD5_HMAC: |
| 195 | thash = &auth_hash_hmac_md5_96; |
| 196 | break; |
| 197 | case CRYPTO_SHA1_HMAC: |
| 198 | thash = &auth_hash_hmac_sha1_96; |
| 199 | break; |
| 200 | case CRYPTO_SHA2_HMAC: |
| 201 | if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) |
| 202 | thash = &auth_hash_hmac_sha2_256; |
| 203 | else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) |
| 204 | thash = &auth_hash_hmac_sha2_384; |
| 205 | else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) |
| 206 | thash = &auth_hash_hmac_sha2_512; |
| 207 | else { |
| 208 | error = EINVAL; |
| 209 | break; |
| 210 | } |
| 211 | break; |
| 212 | case CRYPTO_RIPEMD160_HMAC: |
| 213 | thash = &auth_hash_hmac_ripemd_160_96; |
| 214 | break; |
| 215 | #ifdef notdef |
| 216 | case CRYPTO_MD5: |
| 217 | thash = &auth_hash_md5; |
| 218 | break; |
| 219 | case CRYPTO_SHA1: |
| 220 | thash = &auth_hash_sha1; |
| 221 | break; |
| 222 | #endif |
| 223 | case CRYPTO_NULL_HMAC: |
| 224 | thash = &auth_hash_null; |
| 225 | break; |
| 226 | default: |
| 227 | error = EINVAL; |
| 228 | break; |
| 229 | } |
| 230 | if (error) |
| 231 | break; |
| 232 | |
| 233 | bzero(&crie, sizeof(crie)); |
| 234 | bzero(&cria, sizeof(cria)); |
| 235 | |
| 236 | if (txform) { |
| 237 | crie.cri_alg = txform->type; |
| 238 | crie.cri_klen = sop->keylen * 8; |
| 239 | if (sop->keylen > txform->maxkey || |
| 240 | sop->keylen < txform->minkey) { |
| 241 | error = EINVAL; |
| 242 | goto bail; |
| 243 | } |
| 244 | |
| 245 | MALLOC(crie.cri_key, u_int8_t *, |
| 246 | crie.cri_klen / 8, M_XDATA, M_WAITOK); |
| 247 | if ((error = copyin(sop->key, crie.cri_key, |
| 248 | crie.cri_klen / 8))) |
| 249 | goto bail; |
| 250 | if (thash) |
| 251 | crie.cri_next = &cria; |
| 252 | } |
| 253 | |
| 254 | if (thash) { |
| 255 | cria.cri_alg = thash->type; |
| 256 | cria.cri_klen = sop->mackeylen * 8; |
| 257 | if (sop->mackeylen != thash->keysize) { |
| 258 | error = EINVAL; |
| 259 | goto bail; |
| 260 | } |
| 261 | |
| 262 | if (cria.cri_klen) { |
| 263 | MALLOC(cria.cri_key, u_int8_t *, |
| 264 | cria.cri_klen / 8, M_XDATA, M_WAITOK); |
| 265 | if ((error = copyin(sop->mackey, cria.cri_key, |
| 266 | cria.cri_klen / 8))) |
| 267 | goto bail; |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | error = crypto_newsession(&sid, (txform ? &crie : &cria), 1); |
| 272 | if (error) |
| 273 | goto bail; |
| 274 | |
| 275 | cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen, |
| 276 | cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform, |
| 277 | thash); |
| 278 | |
| 279 | if (cse == NULL) { |
| 280 | crypto_freesession(sid); |
| 281 | error = EINVAL; |
| 282 | goto bail; |
| 283 | } |
| 284 | sop->ses = cse->ses; |
| 285 | |
| 286 | bail: |
| 287 | if (error) { |
| 288 | if (crie.cri_key) |
| 289 | FREE(crie.cri_key, M_XDATA); |
| 290 | if (cria.cri_key) |
| 291 | FREE(cria.cri_key, M_XDATA); |
| 292 | } |
| 293 | break; |
| 294 | case CIOCFSESSION: |
| 295 | ses = *(u_int32_t *)data; |
| 296 | cse = csefind(fcr, ses); |
| 297 | if (cse == NULL) { |
| 298 | error = EINVAL; |
| 299 | break; |
| 300 | } |
| 301 | csedelete(fcr, cse); |
| 302 | error = csefree(cse); |
| 303 | break; |
| 304 | case CIOCCRYPT: |
| 305 | cop = (struct crypt_op *)data; |
| 306 | cse = csefind(fcr, cop->ses); |
| 307 | if (cse == NULL) { |
| 308 | error = EINVAL; |
| 309 | break; |
| 310 | } |
| 311 | error = cryptodev_op(cse, cop); |
| 312 | break; |
| 313 | case CIOCKEY: |
| 314 | error = cryptodev_key((struct crypt_kop *)data); |
| 315 | break; |
| 316 | case CIOCASYMFEAT: |
| 317 | error = crypto_getfeat((int *)data); |
| 318 | break; |
| 319 | default: |
| 320 | error = EINVAL; |
| 321 | break; |
| 322 | } |
| 323 | rel_mplock(); |
| 324 | return (error); |
| 325 | } |
| 326 | |
| 327 | static int cryptodev_cb(void *); |
| 328 | |
| 329 | |
| 330 | static int |
| 331 | cryptodev_op(struct csession *cse, struct crypt_op *cop) |
| 332 | { |
| 333 | struct cryptop *crp = NULL; |
| 334 | struct cryptodesc *crde = NULL, *crda = NULL; |
| 335 | int i, error; |
| 336 | |
| 337 | if (cop->len > 256*1024-4) |
| 338 | return (E2BIG); |
| 339 | |
| 340 | if (cse->txform && (cop->len % cse->txform->blocksize) != 0) |
| 341 | return (EINVAL); |
| 342 | |
| 343 | bzero(&cse->uio, sizeof(cse->uio)); |
| 344 | cse->uio.uio_iovcnt = 1; |
| 345 | cse->uio.uio_resid = 0; |
| 346 | cse->uio.uio_segflg = UIO_SYSSPACE; |
| 347 | cse->uio.uio_rw = UIO_WRITE; |
| 348 | cse->uio.uio_td = curthread; |
| 349 | cse->uio.uio_iov = cse->iovec; |
| 350 | bzero(&cse->iovec, sizeof(cse->iovec)); |
| 351 | cse->uio.uio_iov[0].iov_len = cop->len; |
| 352 | cse->uio.uio_iov[0].iov_base = kmalloc(cop->len, M_XDATA, M_WAITOK); |
| 353 | for (i = 0; i < cse->uio.uio_iovcnt; i++) |
| 354 | cse->uio.uio_resid += cse->uio.uio_iov[0].iov_len; |
| 355 | |
| 356 | crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL)); |
| 357 | if (crp == NULL) { |
| 358 | error = ENOMEM; |
| 359 | goto bail; |
| 360 | } |
| 361 | |
| 362 | if (cse->thash) { |
| 363 | crda = crp->crp_desc; |
| 364 | if (cse->txform) |
| 365 | crde = crda->crd_next; |
| 366 | } else { |
| 367 | if (cse->txform) |
| 368 | crde = crp->crp_desc; |
| 369 | else { |
| 370 | error = EINVAL; |
| 371 | goto bail; |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len))) |
| 376 | goto bail; |
| 377 | |
| 378 | if (crda) { |
| 379 | crda->crd_skip = 0; |
| 380 | crda->crd_len = cop->len; |
| 381 | crda->crd_inject = 0; /* ??? */ |
| 382 | |
| 383 | crda->crd_alg = cse->mac; |
| 384 | crda->crd_key = cse->mackey; |
| 385 | crda->crd_klen = cse->mackeylen * 8; |
| 386 | } |
| 387 | |
| 388 | if (crde) { |
| 389 | if (cop->op == COP_ENCRYPT) |
| 390 | crde->crd_flags |= CRD_F_ENCRYPT; |
| 391 | else |
| 392 | crde->crd_flags &= ~CRD_F_ENCRYPT; |
| 393 | crde->crd_len = cop->len; |
| 394 | crde->crd_inject = 0; |
| 395 | |
| 396 | crde->crd_alg = cse->cipher; |
| 397 | crde->crd_key = cse->key; |
| 398 | crde->crd_klen = cse->keylen * 8; |
| 399 | } |
| 400 | |
| 401 | crp->crp_ilen = cop->len; |
| 402 | crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM |
| 403 | | (cop->flags & COP_F_BATCH); |
| 404 | crp->crp_buf = (caddr_t)&cse->uio; |
| 405 | crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb; |
| 406 | crp->crp_sid = cse->sid; |
| 407 | crp->crp_opaque = (void *)cse; |
| 408 | |
| 409 | if (cop->iv) { |
| 410 | if (crde == NULL) { |
| 411 | error = EINVAL; |
| 412 | goto bail; |
| 413 | } |
| 414 | if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ |
| 415 | error = EINVAL; |
| 416 | goto bail; |
| 417 | } |
| 418 | if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize))) |
| 419 | goto bail; |
| 420 | bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize); |
| 421 | crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT; |
| 422 | crde->crd_skip = 0; |
| 423 | } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */ |
| 424 | crde->crd_skip = 0; |
| 425 | } else if (crde) { |
| 426 | crde->crd_flags |= CRD_F_IV_PRESENT; |
| 427 | crde->crd_skip = cse->txform->blocksize; |
| 428 | crde->crd_len -= cse->txform->blocksize; |
| 429 | } |
| 430 | |
| 431 | if (cop->mac) { |
| 432 | if (crda == NULL) { |
| 433 | error = EINVAL; |
| 434 | goto bail; |
| 435 | } |
| 436 | crp->crp_mac=cse->tmp_mac; |
| 437 | } |
| 438 | |
| 439 | crit_enter(); |
| 440 | error = crypto_dispatch(crp); |
| 441 | if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0) |
| 442 | error = tsleep(crp, 0, "crydev", 0); |
| 443 | crit_exit(); |
| 444 | if (error) |
| 445 | goto bail; |
| 446 | |
| 447 | if (crp->crp_etype != 0) { |
| 448 | error = crp->crp_etype; |
| 449 | goto bail; |
| 450 | } |
| 451 | |
| 452 | if (cse->error) { |
| 453 | error = cse->error; |
| 454 | goto bail; |
| 455 | } |
| 456 | |
| 457 | if (cop->dst && |
| 458 | (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len))) |
| 459 | goto bail; |
| 460 | |
| 461 | if (cop->mac && |
| 462 | (error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) |
| 463 | goto bail; |
| 464 | |
| 465 | bail: |
| 466 | if (crp) |
| 467 | crypto_freereq(crp); |
| 468 | if (cse->uio.uio_iov[0].iov_base) |
| 469 | kfree(cse->uio.uio_iov[0].iov_base, M_XDATA); |
| 470 | |
| 471 | return (error); |
| 472 | } |
| 473 | |
| 474 | static int |
| 475 | cryptodev_cb(void *op) |
| 476 | { |
| 477 | struct cryptop *crp = (struct cryptop *) op; |
| 478 | struct csession *cse = (struct csession *)crp->crp_opaque; |
| 479 | |
| 480 | cse->error = crp->crp_etype; |
| 481 | if (crp->crp_etype == EAGAIN) |
| 482 | return crypto_dispatch(crp); |
| 483 | wakeup_one(crp); |
| 484 | return (0); |
| 485 | } |
| 486 | |
| 487 | static int |
| 488 | cryptodevkey_cb(void *op) |
| 489 | { |
| 490 | struct cryptkop *krp = (struct cryptkop *) op; |
| 491 | |
| 492 | wakeup_one(krp); |
| 493 | return (0); |
| 494 | } |
| 495 | |
| 496 | static int |
| 497 | cryptodev_key(struct crypt_kop *kop) |
| 498 | { |
| 499 | struct cryptkop *krp = NULL; |
| 500 | int error = EINVAL; |
| 501 | int in, out, size, i; |
| 502 | |
| 503 | if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) { |
| 504 | return (EFBIG); |
| 505 | } |
| 506 | |
| 507 | in = kop->crk_iparams; |
| 508 | out = kop->crk_oparams; |
| 509 | switch (kop->crk_op) { |
| 510 | case CRK_MOD_EXP: |
| 511 | if (in == 3 && out == 1) |
| 512 | break; |
| 513 | return (EINVAL); |
| 514 | case CRK_MOD_EXP_CRT: |
| 515 | if (in == 6 && out == 1) |
| 516 | break; |
| 517 | return (EINVAL); |
| 518 | case CRK_DSA_SIGN: |
| 519 | if (in == 5 && out == 2) |
| 520 | break; |
| 521 | return (EINVAL); |
| 522 | case CRK_DSA_VERIFY: |
| 523 | if (in == 7 && out == 0) |
| 524 | break; |
| 525 | return (EINVAL); |
| 526 | case CRK_DH_COMPUTE_KEY: |
| 527 | if (in == 3 && out == 1) |
| 528 | break; |
| 529 | return (EINVAL); |
| 530 | default: |
| 531 | return (EINVAL); |
| 532 | } |
| 533 | |
| 534 | krp = (struct cryptkop *)kmalloc(sizeof *krp, M_XDATA, M_WAITOK | M_ZERO); |
| 535 | krp->krp_op = kop->crk_op; |
| 536 | krp->krp_status = kop->crk_status; |
| 537 | krp->krp_iparams = kop->crk_iparams; |
| 538 | krp->krp_oparams = kop->crk_oparams; |
| 539 | krp->krp_status = 0; |
| 540 | krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb; |
| 541 | |
| 542 | for (i = 0; i < CRK_MAXPARAM; i++) |
| 543 | krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits; |
| 544 | for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) { |
| 545 | size = (krp->krp_param[i].crp_nbits + 7) / 8; |
| 546 | if (size == 0) |
| 547 | continue; |
| 548 | MALLOC(krp->krp_param[i].crp_p, caddr_t, size, M_XDATA, M_WAITOK); |
| 549 | if (i >= krp->krp_iparams) |
| 550 | continue; |
| 551 | error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size); |
| 552 | if (error) |
| 553 | goto fail; |
| 554 | } |
| 555 | |
| 556 | error = crypto_kdispatch(krp); |
| 557 | if (error == 0) |
| 558 | error = tsleep(krp, 0, "crydev", 0); |
| 559 | if (error) |
| 560 | goto fail; |
| 561 | |
| 562 | if (krp->krp_status != 0) { |
| 563 | error = krp->krp_status; |
| 564 | goto fail; |
| 565 | } |
| 566 | |
| 567 | for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) { |
| 568 | size = (krp->krp_param[i].crp_nbits + 7) / 8; |
| 569 | if (size == 0) |
| 570 | continue; |
| 571 | error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size); |
| 572 | if (error) |
| 573 | goto fail; |
| 574 | } |
| 575 | |
| 576 | fail: |
| 577 | if (krp) { |
| 578 | kop->crk_status = krp->krp_status; |
| 579 | for (i = 0; i < CRK_MAXPARAM; i++) { |
| 580 | if (krp->krp_param[i].crp_p) |
| 581 | FREE(krp->krp_param[i].crp_p, M_XDATA); |
| 582 | } |
| 583 | kfree(krp, M_XDATA); |
| 584 | } |
| 585 | return (error); |
| 586 | } |
| 587 | |
| 588 | /* |
| 589 | * MPSAFE |
| 590 | */ |
| 591 | static int |
| 592 | cryptof_poll(struct file *fp, int events, struct ucred *active_cred) |
| 593 | { |
| 594 | return (0); |
| 595 | } |
| 596 | |
| 597 | /* |
| 598 | * MPSAFE |
| 599 | */ |
| 600 | static int |
| 601 | cryptof_kqfilter(struct file *fp, struct knote *kn) |
| 602 | { |
| 603 | |
| 604 | return (0); |
| 605 | } |
| 606 | |
| 607 | /* |
| 608 | * MPSAFE |
| 609 | */ |
| 610 | static int |
| 611 | cryptof_stat(struct file *fp, struct stat *sb, struct ucred *cred) |
| 612 | { |
| 613 | return (EOPNOTSUPP); |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | * MPALMOSTSAFE - acquires mplock |
| 618 | */ |
| 619 | static int |
| 620 | cryptof_close(struct file *fp) |
| 621 | { |
| 622 | struct fcrypt *fcr; |
| 623 | struct csession *cse; |
| 624 | |
| 625 | get_mplock(); |
| 626 | fcr = (struct fcrypt *)fp->f_data; |
| 627 | while ((cse = TAILQ_FIRST(&fcr->csessions))) { |
| 628 | TAILQ_REMOVE(&fcr->csessions, cse, next); |
| 629 | (void)csefree(cse); |
| 630 | } |
| 631 | fp->f_data = NULL; |
| 632 | rel_mplock(); |
| 633 | |
| 634 | FREE(fcr, M_XDATA); |
| 635 | return (0); |
| 636 | } |
| 637 | |
| 638 | static struct csession * |
| 639 | csefind(struct fcrypt *fcr, u_int ses) |
| 640 | { |
| 641 | struct csession *cse; |
| 642 | |
| 643 | TAILQ_FOREACH(cse, &fcr->csessions, next) |
| 644 | if (cse->ses == ses) |
| 645 | return (cse); |
| 646 | return (NULL); |
| 647 | } |
| 648 | |
| 649 | static int |
| 650 | csedelete(struct fcrypt *fcr, struct csession *cse_del) |
| 651 | { |
| 652 | struct csession *cse; |
| 653 | |
| 654 | TAILQ_FOREACH(cse, &fcr->csessions, next) { |
| 655 | if (cse == cse_del) { |
| 656 | TAILQ_REMOVE(&fcr->csessions, cse, next); |
| 657 | return (1); |
| 658 | } |
| 659 | } |
| 660 | return (0); |
| 661 | } |
| 662 | |
| 663 | static struct csession * |
| 664 | cseadd(struct fcrypt *fcr, struct csession *cse) |
| 665 | { |
| 666 | TAILQ_INSERT_TAIL(&fcr->csessions, cse, next); |
| 667 | cse->ses = fcr->sesn++; |
| 668 | return (cse); |
| 669 | } |
| 670 | |
| 671 | struct csession * |
| 672 | csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen, |
| 673 | caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac, |
| 674 | struct enc_xform *txform, struct auth_hash *thash) |
| 675 | { |
| 676 | struct csession *cse; |
| 677 | |
| 678 | MALLOC(cse, struct csession *, sizeof(struct csession), |
| 679 | M_XDATA, M_NOWAIT); |
| 680 | if (cse == NULL) |
| 681 | return NULL; |
| 682 | cse->key = key; |
| 683 | cse->keylen = keylen/8; |
| 684 | cse->mackey = mackey; |
| 685 | cse->mackeylen = mackeylen/8; |
| 686 | cse->sid = sid; |
| 687 | cse->cipher = cipher; |
| 688 | cse->mac = mac; |
| 689 | cse->txform = txform; |
| 690 | cse->thash = thash; |
| 691 | cseadd(fcr, cse); |
| 692 | return (cse); |
| 693 | } |
| 694 | |
| 695 | static int |
| 696 | csefree(struct csession *cse) |
| 697 | { |
| 698 | int error; |
| 699 | |
| 700 | error = crypto_freesession(cse->sid); |
| 701 | if (cse->key) |
| 702 | FREE(cse->key, M_XDATA); |
| 703 | if (cse->mackey) |
| 704 | FREE(cse->mackey, M_XDATA); |
| 705 | FREE(cse, M_XDATA); |
| 706 | return (error); |
| 707 | } |
| 708 | |
| 709 | static int |
| 710 | cryptoopen(struct dev_open_args *ap) |
| 711 | { |
| 712 | if (crypto_usercrypto == 0) |
| 713 | return (ENXIO); |
| 714 | return (0); |
| 715 | } |
| 716 | |
| 717 | static int |
| 718 | cryptoread(struct dev_read_args *ap) |
| 719 | { |
| 720 | return (EIO); |
| 721 | } |
| 722 | |
| 723 | static int |
| 724 | cryptowrite(struct dev_write_args *ap) |
| 725 | { |
| 726 | return (EIO); |
| 727 | } |
| 728 | |
| 729 | static int |
| 730 | cryptoioctl(struct dev_ioctl_args *ap) |
| 731 | { |
| 732 | struct file *f; |
| 733 | struct fcrypt *fcr; |
| 734 | int fd, error; |
| 735 | |
| 736 | switch (ap->a_cmd) { |
| 737 | case CRIOGET: |
| 738 | MALLOC(fcr, struct fcrypt *, |
| 739 | sizeof(struct fcrypt), M_XDATA, M_WAITOK); |
| 740 | TAILQ_INIT(&fcr->csessions); |
| 741 | fcr->sesn = 0; |
| 742 | |
| 743 | KKASSERT(curproc); |
| 744 | error = falloc(curproc, &f, &fd); |
| 745 | |
| 746 | if (error) { |
| 747 | FREE(fcr, M_XDATA); |
| 748 | return (error); |
| 749 | } |
| 750 | f->f_type = DTYPE_CRYPTO; |
| 751 | f->f_flag = FREAD | FWRITE; |
| 752 | f->f_ops = &cryptofops; |
| 753 | f->f_data = fcr; |
| 754 | fsetfd(curproc, f, fd); |
| 755 | *(u_int32_t *)ap->a_data = fd; |
| 756 | fdrop(f); |
| 757 | break; |
| 758 | default: |
| 759 | error = EINVAL; |
| 760 | break; |
| 761 | } |
| 762 | return (error); |
| 763 | } |
| 764 | |
| 765 | #define CRYPTO_MAJOR 70 /* from openbsd */ |
| 766 | static struct dev_ops crypto_ops = { |
| 767 | { "crypto", CRYPTO_MAJOR, 0 }, |
| 768 | .d_open = cryptoopen, |
| 769 | .d_close = nullclose, |
| 770 | .d_read = cryptoread, |
| 771 | .d_write = cryptowrite, |
| 772 | .d_ioctl = cryptoioctl, |
| 773 | }; |
| 774 | |
| 775 | /* |
| 776 | * Initialization code, both for static and dynamic loading. |
| 777 | */ |
| 778 | static int |
| 779 | cryptodev_modevent(module_t mod, int type, void *unused) |
| 780 | { |
| 781 | switch (type) { |
| 782 | case MOD_LOAD: |
| 783 | if (bootverbose) |
| 784 | kprintf("crypto: <crypto device>\n"); |
| 785 | make_dev(&crypto_ops, 0, UID_ROOT, GID_WHEEL, |
| 786 | 0666, "crypto"); |
| 787 | return 0; |
| 788 | case MOD_UNLOAD: |
| 789 | /*XXX disallow if active sessions */ |
| 790 | //dev_ops_remove(&crypto_ops, 0, 0); |
| 791 | dev_ops_remove_all(&crypto_ops); |
| 792 | return 0; |
| 793 | } |
| 794 | return EINVAL; |
| 795 | } |
| 796 | |
| 797 | static moduledata_t cryptodev_mod = { |
| 798 | "cryptodev", |
| 799 | cryptodev_modevent, |
| 800 | 0 |
| 801 | }; |
| 802 | MODULE_VERSION(cryptodev, 1); |
| 803 | DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); |
| 804 | #if 0 |
| 805 | MODULE_DEPEND(cryptodev, crypto, 1, 1, 1); |
| 806 | #endif |