The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/opencrypto/cryptodev.c

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    1 /*      $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $  */
    2 
    3 /*-
    4  * Copyright (c) 2001 Theo de Raadt
    5  * Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
    6  * Copyright (c) 2014 The FreeBSD Foundation
    7  * All rights reserved.
    8  *
    9  * Portions of this software were developed by John-Mark Gurney
   10  * under sponsorship of the FreeBSD Foundation and
   11  * Rubicon Communications, LLC (Netgate).
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  *
   17  * 1. Redistributions of source code must retain the above copyright
   18  *   notice, this list of conditions and the following disclaimer.
   19  * 2. Redistributions in binary form must reproduce the above copyright
   20  *   notice, this list of conditions and the following disclaimer in the
   21  *   documentation and/or other materials provided with the distribution.
   22  * 3. The name of the author may not be used to endorse or promote products
   23  *   derived from this software without specific prior written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   26  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   27  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   28  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   29  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   31  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   34  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   35  *
   36  * Effort sponsored in part by the Defense Advanced Research Projects
   37  * Agency (DARPA) and Air Force Research Laboratory, Air Force
   38  * Materiel Command, USAF, under agreement number F30602-01-2-0537.
   39  */
   40 
   41 #include <sys/cdefs.h>
   42 __FBSDID("$FreeBSD: releng/11.2/sys/opencrypto/cryptodev.c 330129 2018-02-28 21:41:52Z jhb $");
   43 
   44 #include "opt_compat.h"
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/malloc.h>
   49 #include <sys/mbuf.h>
   50 #include <sys/lock.h>
   51 #include <sys/mutex.h>
   52 #include <sys/sysctl.h>
   53 #include <sys/file.h>
   54 #include <sys/filedesc.h>
   55 #include <sys/errno.h>
   56 #include <sys/uio.h>
   57 #include <sys/random.h>
   58 #include <sys/conf.h>
   59 #include <sys/kernel.h>
   60 #include <sys/module.h>
   61 #include <sys/fcntl.h>
   62 #include <sys/bus.h>
   63 #include <sys/user.h>
   64 #include <sys/sdt.h>
   65 
   66 #include <opencrypto/cryptodev.h>
   67 #include <opencrypto/xform.h>
   68 
   69 SDT_PROVIDER_DECLARE(opencrypto);
   70 
   71 SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
   72 
   73 #ifdef COMPAT_FREEBSD32
   74 #include <sys/mount.h>
   75 #include <compat/freebsd32/freebsd32.h>
   76 
   77 struct session_op32 {
   78         u_int32_t       cipher;
   79         u_int32_t       mac;
   80         u_int32_t       keylen;
   81         u_int32_t       key;
   82         int             mackeylen;
   83         u_int32_t       mackey;
   84         u_int32_t       ses;
   85 };
   86 
   87 struct session2_op32 {
   88         u_int32_t       cipher;
   89         u_int32_t       mac;
   90         u_int32_t       keylen;
   91         u_int32_t       key;
   92         int             mackeylen;
   93         u_int32_t       mackey;
   94         u_int32_t       ses;
   95         int             crid;
   96         int             pad[4];
   97 };
   98 
   99 struct crypt_op32 {
  100         u_int32_t       ses;
  101         u_int16_t       op;
  102         u_int16_t       flags;
  103         u_int           len;
  104         u_int32_t       src, dst;
  105         u_int32_t       mac;
  106         u_int32_t       iv;
  107 };
  108 
  109 struct crparam32 {
  110         u_int32_t       crp_p;
  111         u_int           crp_nbits;
  112 };
  113 
  114 struct crypt_kop32 {
  115         u_int           crk_op;
  116         u_int           crk_status;
  117         u_short         crk_iparams;
  118         u_short         crk_oparams;
  119         u_int           crk_crid;
  120         struct crparam32        crk_param[CRK_MAXPARAM];
  121 };
  122 
  123 struct cryptotstat32 {
  124         struct timespec32       acc;
  125         struct timespec32       min;
  126         struct timespec32       max;
  127         u_int32_t       count;
  128 };
  129 
  130 struct cryptostats32 {
  131         u_int32_t       cs_ops;
  132         u_int32_t       cs_errs;
  133         u_int32_t       cs_kops;
  134         u_int32_t       cs_kerrs;
  135         u_int32_t       cs_intrs;
  136         u_int32_t       cs_rets;
  137         u_int32_t       cs_blocks;
  138         u_int32_t       cs_kblocks;
  139         struct cryptotstat32 cs_invoke;
  140         struct cryptotstat32 cs_done;
  141         struct cryptotstat32 cs_cb;
  142         struct cryptotstat32 cs_finis;
  143 };
  144 
  145 #define CIOCGSESSION32  _IOWR('c', 101, struct session_op32)
  146 #define CIOCCRYPT32     _IOWR('c', 103, struct crypt_op32)
  147 #define CIOCKEY32       _IOWR('c', 104, struct crypt_kop32)
  148 #define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
  149 #define CIOCKEY232      _IOWR('c', 107, struct crypt_kop32)
  150 
  151 static void
  152 session_op_from_32(const struct session_op32 *from, struct session_op *to)
  153 {
  154 
  155         CP(*from, *to, cipher);
  156         CP(*from, *to, mac);
  157         CP(*from, *to, keylen);
  158         PTRIN_CP(*from, *to, key);
  159         CP(*from, *to, mackeylen);
  160         PTRIN_CP(*from, *to, mackey);
  161         CP(*from, *to, ses);
  162 }
  163 
  164 static void
  165 session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
  166 {
  167 
  168         session_op_from_32((const struct session_op32 *)from,
  169             (struct session_op *)to);
  170         CP(*from, *to, crid);
  171 }
  172 
  173 static void
  174 session_op_to_32(const struct session_op *from, struct session_op32 *to)
  175 {
  176 
  177         CP(*from, *to, cipher);
  178         CP(*from, *to, mac);
  179         CP(*from, *to, keylen);
  180         PTROUT_CP(*from, *to, key);
  181         CP(*from, *to, mackeylen);
  182         PTROUT_CP(*from, *to, mackey);
  183         CP(*from, *to, ses);
  184 }
  185 
  186 static void
  187 session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
  188 {
  189 
  190         session_op_to_32((const struct session_op *)from,
  191             (struct session_op32 *)to);
  192         CP(*from, *to, crid);
  193 }
  194 
  195 static void
  196 crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
  197 {
  198 
  199         CP(*from, *to, ses);
  200         CP(*from, *to, op);
  201         CP(*from, *to, flags);
  202         CP(*from, *to, len);
  203         PTRIN_CP(*from, *to, src);
  204         PTRIN_CP(*from, *to, dst);
  205         PTRIN_CP(*from, *to, mac);
  206         PTRIN_CP(*from, *to, iv);
  207 }
  208 
  209 static void
  210 crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
  211 {
  212 
  213         CP(*from, *to, ses);
  214         CP(*from, *to, op);
  215         CP(*from, *to, flags);
  216         CP(*from, *to, len);
  217         PTROUT_CP(*from, *to, src);
  218         PTROUT_CP(*from, *to, dst);
  219         PTROUT_CP(*from, *to, mac);
  220         PTROUT_CP(*from, *to, iv);
  221 }
  222 
  223 static void
  224 crparam_from_32(const struct crparam32 *from, struct crparam *to)
  225 {
  226 
  227         PTRIN_CP(*from, *to, crp_p);
  228         CP(*from, *to, crp_nbits);
  229 }
  230 
  231 static void
  232 crparam_to_32(const struct crparam *from, struct crparam32 *to)
  233 {
  234 
  235         PTROUT_CP(*from, *to, crp_p);
  236         CP(*from, *to, crp_nbits);
  237 }
  238 
  239 static void
  240 crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
  241 {
  242         int i;
  243 
  244         CP(*from, *to, crk_op);
  245         CP(*from, *to, crk_status);
  246         CP(*from, *to, crk_iparams);
  247         CP(*from, *to, crk_oparams);
  248         CP(*from, *to, crk_crid);
  249         for (i = 0; i < CRK_MAXPARAM; i++)
  250                 crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
  251 }
  252 
  253 static void
  254 crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
  255 {
  256         int i;
  257 
  258         CP(*from, *to, crk_op);
  259         CP(*from, *to, crk_status);
  260         CP(*from, *to, crk_iparams);
  261         CP(*from, *to, crk_oparams);
  262         CP(*from, *to, crk_crid);
  263         for (i = 0; i < CRK_MAXPARAM; i++)
  264                 crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
  265 }
  266 #endif
  267 
  268 struct csession {
  269         TAILQ_ENTRY(csession) next;
  270         u_int64_t       sid;
  271         u_int32_t       ses;
  272         struct mtx      lock;           /* for op submission */
  273 
  274         u_int32_t       cipher;
  275         struct enc_xform *txform;
  276         u_int32_t       mac;
  277         struct auth_hash *thash;
  278 
  279         caddr_t         key;
  280         int             keylen;
  281 
  282         caddr_t         mackey;
  283         int             mackeylen;
  284 
  285         struct iovec    iovec;
  286         struct uio      uio;
  287         int             error;
  288 };
  289 
  290 struct fcrypt {
  291         TAILQ_HEAD(csessionlist, csession) csessions;
  292         int             sesn;
  293 };
  294 
  295 static  int cryptof_ioctl(struct file *, u_long, void *,
  296                     struct ucred *, struct thread *);
  297 static  int cryptof_stat(struct file *, struct stat *,
  298                     struct ucred *, struct thread *);
  299 static  int cryptof_close(struct file *, struct thread *);
  300 static  int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
  301                     struct filedesc *);
  302 
  303 static struct fileops cryptofops = {
  304     .fo_read = invfo_rdwr,
  305     .fo_write = invfo_rdwr,
  306     .fo_truncate = invfo_truncate,
  307     .fo_ioctl = cryptof_ioctl,
  308     .fo_poll = invfo_poll,
  309     .fo_kqfilter = invfo_kqfilter,
  310     .fo_stat = cryptof_stat,
  311     .fo_close = cryptof_close,
  312     .fo_chmod = invfo_chmod,
  313     .fo_chown = invfo_chown,
  314     .fo_sendfile = invfo_sendfile,
  315     .fo_fill_kinfo = cryptof_fill_kinfo,
  316 };
  317 
  318 static struct csession *csefind(struct fcrypt *, u_int);
  319 static int csedelete(struct fcrypt *, struct csession *);
  320 static struct csession *cseadd(struct fcrypt *, struct csession *);
  321 static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
  322     u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
  323     struct auth_hash *);
  324 static int csefree(struct csession *);
  325 
  326 static  int cryptodev_op(struct csession *, struct crypt_op *,
  327                         struct ucred *, struct thread *td);
  328 static  int cryptodev_aead(struct csession *, struct crypt_aead *,
  329                         struct ucred *, struct thread *);
  330 static  int cryptodev_key(struct crypt_kop *);
  331 static  int cryptodev_find(struct crypt_find_op *);
  332 
  333 /*
  334  * Check a crypto identifier to see if it requested
  335  * a software device/driver.  This can be done either
  336  * by device name/class or through search constraints.
  337  */
  338 static int
  339 checkforsoftware(int *cridp)
  340 {
  341         int crid;
  342 
  343         crid = *cridp;
  344 
  345         if (!crypto_devallowsoft) {
  346                 if (crid & CRYPTOCAP_F_SOFTWARE) {
  347                         if (crid & CRYPTOCAP_F_HARDWARE) {
  348                                 *cridp = CRYPTOCAP_F_HARDWARE;
  349                                 return 0;
  350                         }
  351                         return EINVAL;
  352                 }
  353                 if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
  354                     (crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
  355                         return EINVAL;
  356         }
  357         return 0;
  358 }
  359 
  360 /* ARGSUSED */
  361 static int
  362 cryptof_ioctl(
  363         struct file *fp,
  364         u_long cmd,
  365         void *data,
  366         struct ucred *active_cred,
  367         struct thread *td)
  368 {
  369 #define SES2(p) ((struct session2_op *)p)
  370         struct cryptoini cria, crie;
  371         struct fcrypt *fcr = fp->f_data;
  372         struct csession *cse;
  373         struct session_op *sop;
  374         struct crypt_op *cop;
  375         struct crypt_aead *caead;
  376         struct enc_xform *txform = NULL;
  377         struct auth_hash *thash = NULL;
  378         struct crypt_kop *kop;
  379         u_int64_t sid;
  380         u_int32_t ses;
  381         int error = 0, crid;
  382 #ifdef COMPAT_FREEBSD32
  383         struct session2_op sopc;
  384         struct crypt_op copc;
  385         struct crypt_kop kopc;
  386 #endif
  387 
  388         switch (cmd) {
  389         case CIOCGSESSION:
  390         case CIOCGSESSION2:
  391 #ifdef COMPAT_FREEBSD32
  392         case CIOCGSESSION32:
  393         case CIOCGSESSION232:
  394                 if (cmd == CIOCGSESSION32) {
  395                         session_op_from_32(data, (struct session_op *)&sopc);
  396                         sop = (struct session_op *)&sopc;
  397                 } else if (cmd == CIOCGSESSION232) {
  398                         session2_op_from_32(data, &sopc);
  399                         sop = (struct session_op *)&sopc;
  400                 } else
  401 #endif
  402                         sop = (struct session_op *)data;
  403                 switch (sop->cipher) {
  404                 case 0:
  405                         break;
  406                 case CRYPTO_DES_CBC:
  407                         txform = &enc_xform_des;
  408                         break;
  409                 case CRYPTO_3DES_CBC:
  410                         txform = &enc_xform_3des;
  411                         break;
  412                 case CRYPTO_BLF_CBC:
  413                         txform = &enc_xform_blf;
  414                         break;
  415                 case CRYPTO_CAST_CBC:
  416                         txform = &enc_xform_cast5;
  417                         break;
  418                 case CRYPTO_SKIPJACK_CBC:
  419                         txform = &enc_xform_skipjack;
  420                         break;
  421                 case CRYPTO_AES_CBC:
  422                         txform = &enc_xform_rijndael128;
  423                         break;
  424                 case CRYPTO_AES_XTS:
  425                         txform = &enc_xform_aes_xts;
  426                         break;
  427                 case CRYPTO_NULL_CBC:
  428                         txform = &enc_xform_null;
  429                         break;
  430                 case CRYPTO_ARC4:
  431                         txform = &enc_xform_arc4;
  432                         break;
  433                 case CRYPTO_CAMELLIA_CBC:
  434                         txform = &enc_xform_camellia;
  435                         break;
  436                 case CRYPTO_AES_ICM:
  437                         txform = &enc_xform_aes_icm;
  438                         break;
  439                 case CRYPTO_AES_NIST_GCM_16:
  440                         txform = &enc_xform_aes_nist_gcm;
  441                         break;
  442 
  443                 default:
  444                         CRYPTDEB("invalid cipher");
  445                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  446                         return (EINVAL);
  447                 }
  448 
  449                 switch (sop->mac) {
  450                 case 0:
  451                         break;
  452                 case CRYPTO_MD5_HMAC:
  453                         thash = &auth_hash_hmac_md5;
  454                         break;
  455                 case CRYPTO_SHA1_HMAC:
  456                         thash = &auth_hash_hmac_sha1;
  457                         break;
  458                 case CRYPTO_SHA2_256_HMAC:
  459                         thash = &auth_hash_hmac_sha2_256;
  460                         break;
  461                 case CRYPTO_SHA2_384_HMAC:
  462                         thash = &auth_hash_hmac_sha2_384;
  463                         break;
  464                 case CRYPTO_SHA2_512_HMAC:
  465                         thash = &auth_hash_hmac_sha2_512;
  466                         break;
  467                 case CRYPTO_RIPEMD160_HMAC:
  468                         thash = &auth_hash_hmac_ripemd_160;
  469                         break;
  470                 case CRYPTO_AES_128_NIST_GMAC:
  471                         thash = &auth_hash_nist_gmac_aes_128;
  472                         break;
  473                 case CRYPTO_AES_192_NIST_GMAC:
  474                         thash = &auth_hash_nist_gmac_aes_192;
  475                         break;
  476                 case CRYPTO_AES_256_NIST_GMAC:
  477                         thash = &auth_hash_nist_gmac_aes_256;
  478                         break;
  479 
  480 #ifdef notdef
  481                 case CRYPTO_MD5:
  482                         thash = &auth_hash_md5;
  483                         break;
  484                 case CRYPTO_SHA1:
  485                         thash = &auth_hash_sha1;
  486                         break;
  487 #endif
  488                 case CRYPTO_NULL_HMAC:
  489                         thash = &auth_hash_null;
  490                         break;
  491                 default:
  492                         CRYPTDEB("invalid mac");
  493                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  494                         return (EINVAL);
  495                 }
  496 
  497                 bzero(&crie, sizeof(crie));
  498                 bzero(&cria, sizeof(cria));
  499 
  500                 if (txform) {
  501                         crie.cri_alg = txform->type;
  502                         crie.cri_klen = sop->keylen * 8;
  503                         if (sop->keylen > txform->maxkey ||
  504                             sop->keylen < txform->minkey) {
  505                                 CRYPTDEB("invalid cipher parameters");
  506                                 error = EINVAL;
  507                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
  508                                     __LINE__);
  509                                 goto bail;
  510                         }
  511 
  512                         crie.cri_key = malloc(crie.cri_klen / 8,
  513                             M_XDATA, M_WAITOK);
  514                         if ((error = copyin(sop->key, crie.cri_key,
  515                             crie.cri_klen / 8))) {
  516                                 CRYPTDEB("invalid key");
  517                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
  518                                     __LINE__);
  519                                 goto bail;
  520                         }
  521                         if (thash)
  522                                 crie.cri_next = &cria;
  523                 }
  524 
  525                 if (thash) {
  526                         cria.cri_alg = thash->type;
  527                         cria.cri_klen = sop->mackeylen * 8;
  528                         if (sop->mackeylen != thash->keysize) {
  529                                 CRYPTDEB("invalid mac key length");
  530                                 error = EINVAL;
  531                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
  532                                     __LINE__);
  533                                 goto bail;
  534                         }
  535 
  536                         if (cria.cri_klen) {
  537                                 cria.cri_key = malloc(cria.cri_klen / 8,
  538                                     M_XDATA, M_WAITOK);
  539                                 if ((error = copyin(sop->mackey, cria.cri_key,
  540                                     cria.cri_klen / 8))) {
  541                                         CRYPTDEB("invalid mac key");
  542                                         SDT_PROBE1(opencrypto, dev, ioctl,
  543                                             error, __LINE__);
  544                                         goto bail;
  545                                 }
  546                         }
  547                 }
  548 
  549                 /* NB: CIOCGSESSION2 has the crid */
  550                 if (cmd == CIOCGSESSION2
  551 #ifdef COMPAT_FREEBSD32
  552                     || cmd == CIOCGSESSION232
  553 #endif
  554                         ) {
  555                         crid = SES2(sop)->crid;
  556                         error = checkforsoftware(&crid);
  557                         if (error) {
  558                                 CRYPTDEB("checkforsoftware");
  559                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
  560                                     __LINE__);
  561                                 goto bail;
  562                         }
  563                 } else
  564                         crid = CRYPTOCAP_F_HARDWARE;
  565                 error = crypto_newsession(&sid, (txform ? &crie : &cria), crid);
  566                 if (error) {
  567                         CRYPTDEB("crypto_newsession");
  568                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  569                         goto bail;
  570                 }
  571 
  572                 cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
  573                     cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
  574                     thash);
  575 
  576                 if (cse == NULL) {
  577                         crypto_freesession(sid);
  578                         error = EINVAL;
  579                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  580                         CRYPTDEB("csecreate");
  581                         goto bail;
  582                 }
  583                 sop->ses = cse->ses;
  584                 if (cmd == CIOCGSESSION2
  585 #ifdef COMPAT_FREEBSD32
  586                     || cmd == CIOCGSESSION232
  587 #endif
  588                     ) {
  589                         /* return hardware/driver id */
  590                         SES2(sop)->crid = CRYPTO_SESID2HID(cse->sid);
  591                 }
  592 bail:
  593                 if (error) {
  594                         if (crie.cri_key)
  595                                 free(crie.cri_key, M_XDATA);
  596                         if (cria.cri_key)
  597                                 free(cria.cri_key, M_XDATA);
  598                 }
  599 #ifdef COMPAT_FREEBSD32
  600                 else {
  601                         if (cmd == CIOCGSESSION32)
  602                                 session_op_to_32(sop, data);
  603                         else if (cmd == CIOCGSESSION232)
  604                                 session2_op_to_32((struct session2_op *)sop,
  605                                     data);
  606                 }
  607 #endif
  608                 break;
  609         case CIOCFSESSION:
  610                 ses = *(u_int32_t *)data;
  611                 cse = csefind(fcr, ses);
  612                 if (cse == NULL) {
  613                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  614                         return (EINVAL);
  615                 }
  616                 csedelete(fcr, cse);
  617                 error = csefree(cse);
  618                 break;
  619         case CIOCCRYPT:
  620 #ifdef COMPAT_FREEBSD32
  621         case CIOCCRYPT32:
  622                 if (cmd == CIOCCRYPT32) {
  623                         cop = &copc;
  624                         crypt_op_from_32(data, cop);
  625                 } else
  626 #endif
  627                         cop = (struct crypt_op *)data;
  628                 cse = csefind(fcr, cop->ses);
  629                 if (cse == NULL) {
  630                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  631                         return (EINVAL);
  632                 }
  633                 error = cryptodev_op(cse, cop, active_cred, td);
  634 #ifdef COMPAT_FREEBSD32
  635                 if (error == 0 && cmd == CIOCCRYPT32)
  636                         crypt_op_to_32(cop, data);
  637 #endif
  638                 break;
  639         case CIOCKEY:
  640         case CIOCKEY2:
  641 #ifdef COMPAT_FREEBSD32
  642         case CIOCKEY32:
  643         case CIOCKEY232:
  644 #endif
  645                 if (!crypto_userasymcrypto) {
  646                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  647                         return (EPERM);         /* XXX compat? */
  648                 }
  649 #ifdef COMPAT_FREEBSD32
  650                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
  651                         kop = &kopc;
  652                         crypt_kop_from_32(data, kop);
  653                 } else
  654 #endif
  655                         kop = (struct crypt_kop *)data;
  656                 if (cmd == CIOCKEY
  657 #ifdef COMPAT_FREEBSD32
  658                     || cmd == CIOCKEY32
  659 #endif
  660                     ) {
  661                         /* NB: crypto core enforces s/w driver use */
  662                         kop->crk_crid =
  663                             CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
  664                 }
  665                 mtx_lock(&Giant);
  666                 error = cryptodev_key(kop);
  667                 mtx_unlock(&Giant);
  668 #ifdef COMPAT_FREEBSD32
  669                 if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
  670                         crypt_kop_to_32(kop, data);
  671 #endif
  672                 break;
  673         case CIOCASYMFEAT:
  674                 if (!crypto_userasymcrypto) {
  675                         /*
  676                          * NB: if user asym crypto operations are
  677                          * not permitted return "no algorithms"
  678                          * so well-behaved applications will just
  679                          * fallback to doing them in software.
  680                          */
  681                         *(int *)data = 0;
  682                 } else {
  683                         error = crypto_getfeat((int *)data);
  684                         if (error)
  685                                 SDT_PROBE1(opencrypto, dev, ioctl, error,
  686                                     __LINE__);
  687                 }
  688                 break;
  689         case CIOCFINDDEV:
  690                 error = cryptodev_find((struct crypt_find_op *)data);
  691                 break;
  692         case CIOCCRYPTAEAD:
  693                 caead = (struct crypt_aead *)data;
  694                 cse = csefind(fcr, caead->ses);
  695                 if (cse == NULL) {
  696                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  697                         return (EINVAL);
  698                 }
  699                 error = cryptodev_aead(cse, caead, active_cred, td);
  700                 break;
  701         default:
  702                 error = EINVAL;
  703                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  704                 break;
  705         }
  706         return (error);
  707 #undef SES2
  708 }
  709 
  710 static int cryptodev_cb(void *);
  711 
  712 
  713 static int
  714 cryptodev_op(
  715         struct csession *cse,
  716         struct crypt_op *cop,
  717         struct ucred *active_cred,
  718         struct thread *td)
  719 {
  720         struct cryptop *crp = NULL;
  721         struct cryptodesc *crde = NULL, *crda = NULL;
  722         int error;
  723 
  724         if (cop->len > 256*1024-4) {
  725                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  726                 return (E2BIG);
  727         }
  728 
  729         if (cse->txform) {
  730                 if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
  731                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  732                         return (EINVAL);
  733                 }
  734         }
  735 
  736         cse->uio.uio_iov = &cse->iovec;
  737         cse->uio.uio_iovcnt = 1;
  738         cse->uio.uio_offset = 0;
  739         cse->uio.uio_resid = cop->len;
  740         cse->uio.uio_segflg = UIO_SYSSPACE;
  741         cse->uio.uio_rw = UIO_WRITE;
  742         cse->uio.uio_td = td;
  743         cse->uio.uio_iov[0].iov_len = cop->len;
  744         if (cse->thash) {
  745                 cse->uio.uio_iov[0].iov_len += cse->thash->hashsize;
  746                 cse->uio.uio_resid += cse->thash->hashsize;
  747         }
  748         cse->uio.uio_iov[0].iov_base = malloc(cse->uio.uio_iov[0].iov_len,
  749             M_XDATA, M_WAITOK);
  750 
  751         crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
  752         if (crp == NULL) {
  753                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  754                 error = ENOMEM;
  755                 goto bail;
  756         }
  757 
  758         if (cse->thash) {
  759                 crda = crp->crp_desc;
  760                 if (cse->txform)
  761                         crde = crda->crd_next;
  762         } else {
  763                 if (cse->txform)
  764                         crde = crp->crp_desc;
  765                 else {
  766                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  767                         error = EINVAL;
  768                         goto bail;
  769                 }
  770         }
  771 
  772         if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base,
  773             cop->len))) {
  774                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  775                 goto bail;
  776         }
  777 
  778         if (crda) {
  779                 crda->crd_skip = 0;
  780                 crda->crd_len = cop->len;
  781                 crda->crd_inject = cop->len;
  782 
  783                 crda->crd_alg = cse->mac;
  784                 crda->crd_key = cse->mackey;
  785                 crda->crd_klen = cse->mackeylen * 8;
  786         }
  787 
  788         if (crde) {
  789                 if (cop->op == COP_ENCRYPT)
  790                         crde->crd_flags |= CRD_F_ENCRYPT;
  791                 else
  792                         crde->crd_flags &= ~CRD_F_ENCRYPT;
  793                 crde->crd_len = cop->len;
  794                 crde->crd_inject = 0;
  795 
  796                 crde->crd_alg = cse->cipher;
  797                 crde->crd_key = cse->key;
  798                 crde->crd_klen = cse->keylen * 8;
  799         }
  800 
  801         crp->crp_ilen = cop->len;
  802         crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
  803                        | (cop->flags & COP_F_BATCH);
  804         crp->crp_buf = (caddr_t)&cse->uio;
  805         crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
  806         crp->crp_sid = cse->sid;
  807         crp->crp_opaque = (void *)cse;
  808 
  809         if (cop->iv) {
  810                 if (crde == NULL) {
  811                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  812                         error = EINVAL;
  813                         goto bail;
  814                 }
  815                 if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
  816                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  817                         error = EINVAL;
  818                         goto bail;
  819                 }
  820                 if ((error = copyin(cop->iv, crde->crd_iv,
  821                     cse->txform->blocksize))) {
  822                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  823                         goto bail;
  824                 }
  825                 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
  826                 crde->crd_skip = 0;
  827         } else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
  828                 crde->crd_skip = 0;
  829         } else if (crde) {
  830                 crde->crd_flags |= CRD_F_IV_PRESENT;
  831                 crde->crd_skip = cse->txform->blocksize;
  832                 crde->crd_len -= cse->txform->blocksize;
  833         }
  834 
  835         if (cop->mac && crda == NULL) {
  836                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  837                 error = EINVAL;
  838                 goto bail;
  839         }
  840 
  841 again:
  842         /*
  843          * Let the dispatch run unlocked, then, interlock against the
  844          * callback before checking if the operation completed and going
  845          * to sleep.  This insures drivers don't inherit our lock which
  846          * results in a lock order reversal between crypto_dispatch forced
  847          * entry and the crypto_done callback into us.
  848          */
  849         error = crypto_dispatch(crp);
  850         mtx_lock(&cse->lock);
  851         if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
  852                 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
  853         mtx_unlock(&cse->lock);
  854 
  855         if (error != 0) {
  856                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  857                 goto bail;
  858         }
  859 
  860         if (crp->crp_etype == EAGAIN) {
  861                 crp->crp_etype = 0;
  862                 crp->crp_flags &= ~CRYPTO_F_DONE;
  863                 goto again;
  864         }
  865 
  866         if (crp->crp_etype != 0) {
  867                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  868                 error = crp->crp_etype;
  869                 goto bail;
  870         }
  871 
  872         if (cse->error) {
  873                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  874                 error = cse->error;
  875                 goto bail;
  876         }
  877 
  878         if (cop->dst &&
  879             (error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst,
  880             cop->len))) {
  881                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  882                 goto bail;
  883         }
  884 
  885         if (cop->mac &&
  886             (error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
  887             cop->mac, cse->thash->hashsize))) {
  888                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  889                 goto bail;
  890         }
  891 
  892 bail:
  893         if (crp)
  894                 crypto_freereq(crp);
  895         if (cse->uio.uio_iov[0].iov_base)
  896                 free(cse->uio.uio_iov[0].iov_base, M_XDATA);
  897 
  898         return (error);
  899 }
  900 
  901 static int
  902 cryptodev_aead(
  903         struct csession *cse,
  904         struct crypt_aead *caead,
  905         struct ucred *active_cred,
  906         struct thread *td)
  907 {
  908         struct uio *uio;
  909         struct cryptop *crp = NULL;
  910         struct cryptodesc *crde = NULL, *crda = NULL;
  911         int error;
  912 
  913         if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
  914                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  915                 return (E2BIG);
  916         }
  917 
  918         if (cse->txform == NULL || cse->thash == NULL || caead->tag == NULL ||
  919             (caead->len % cse->txform->blocksize) != 0) {
  920                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  921                 return (EINVAL);
  922         }
  923 
  924         uio = &cse->uio;
  925         uio->uio_iov = &cse->iovec;
  926         uio->uio_iovcnt = 1;
  927         uio->uio_offset = 0;
  928         uio->uio_resid = caead->aadlen + caead->len + cse->thash->hashsize;
  929         uio->uio_segflg = UIO_SYSSPACE;
  930         uio->uio_rw = UIO_WRITE;
  931         uio->uio_td = td;
  932         uio->uio_iov[0].iov_len = uio->uio_resid;
  933 
  934         uio->uio_iov[0].iov_base = malloc(uio->uio_iov[0].iov_len,
  935             M_XDATA, M_WAITOK);
  936 
  937         crp = crypto_getreq(2);
  938         if (crp == NULL) {
  939                 error = ENOMEM;
  940                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  941                 goto bail;
  942         }
  943 
  944         crda = crp->crp_desc;
  945         crde = crda->crd_next;
  946 
  947         if ((error = copyin(caead->aad, cse->uio.uio_iov[0].iov_base,
  948             caead->aadlen))) {
  949                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  950                 goto bail;
  951         }
  952 
  953         if ((error = copyin(caead->src, (char *)cse->uio.uio_iov[0].iov_base +
  954             caead->aadlen, caead->len))) {
  955                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  956                 goto bail;
  957         }
  958 
  959         crda->crd_skip = 0;
  960         crda->crd_len = caead->aadlen;
  961         crda->crd_inject = caead->aadlen + caead->len;
  962 
  963         crda->crd_alg = cse->mac;
  964         crda->crd_key = cse->mackey;
  965         crda->crd_klen = cse->mackeylen * 8;
  966 
  967         if (caead->op == COP_ENCRYPT)
  968                 crde->crd_flags |= CRD_F_ENCRYPT;
  969         else
  970                 crde->crd_flags &= ~CRD_F_ENCRYPT;
  971         crde->crd_skip = caead->aadlen;
  972         crde->crd_len = caead->len;
  973         crde->crd_inject = caead->aadlen;
  974 
  975         crde->crd_alg = cse->cipher;
  976         crde->crd_key = cse->key;
  977         crde->crd_klen = cse->keylen * 8;
  978 
  979         crp->crp_ilen = caead->aadlen + caead->len;
  980         crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
  981                        | (caead->flags & COP_F_BATCH);
  982         crp->crp_buf = (caddr_t)&cse->uio.uio_iov;
  983         crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
  984         crp->crp_sid = cse->sid;
  985         crp->crp_opaque = (void *)cse;
  986 
  987         if (caead->iv) {
  988                 if (caead->ivlen > sizeof(crde->crd_iv)) {
  989                         error = EINVAL;
  990                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  991                         goto bail;
  992                 }
  993 
  994                 if ((error = copyin(caead->iv, crde->crd_iv, caead->ivlen))) {
  995                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
  996                         goto bail;
  997                 }
  998                 crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
  999         } else {
 1000                 crde->crd_flags |= CRD_F_IV_PRESENT;
 1001                 crde->crd_skip += cse->txform->blocksize;
 1002                 crde->crd_len -= cse->txform->blocksize;
 1003         }
 1004 
 1005         if ((error = copyin(caead->tag, (caddr_t)cse->uio.uio_iov[0].iov_base +
 1006             caead->len + caead->aadlen, cse->thash->hashsize))) {
 1007                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1008                 goto bail;
 1009         }
 1010 again:
 1011         /*
 1012          * Let the dispatch run unlocked, then, interlock against the
 1013          * callback before checking if the operation completed and going
 1014          * to sleep.  This insures drivers don't inherit our lock which
 1015          * results in a lock order reversal between crypto_dispatch forced
 1016          * entry and the crypto_done callback into us.
 1017          */
 1018         error = crypto_dispatch(crp);
 1019         mtx_lock(&cse->lock);
 1020         if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
 1021                 error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
 1022         mtx_unlock(&cse->lock);
 1023 
 1024         if (error != 0) {
 1025                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1026                 goto bail;
 1027         }
 1028 
 1029         if (crp->crp_etype == EAGAIN) {
 1030                 crp->crp_etype = 0;
 1031                 crp->crp_flags &= ~CRYPTO_F_DONE;
 1032                 goto again;
 1033         }
 1034 
 1035         if (crp->crp_etype != 0) {
 1036                 error = crp->crp_etype;
 1037                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1038                 goto bail;
 1039         }
 1040 
 1041         if (cse->error) {
 1042                 error = cse->error;
 1043                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1044                 goto bail;
 1045         }
 1046 
 1047         if (caead->dst && (error = copyout(
 1048             (caddr_t)cse->uio.uio_iov[0].iov_base + caead->aadlen, caead->dst,
 1049             caead->len))) {
 1050                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1051                 goto bail;
 1052         }
 1053 
 1054         if ((error = copyout((caddr_t)cse->uio.uio_iov[0].iov_base +
 1055             caead->aadlen + caead->len, caead->tag, cse->thash->hashsize))) {
 1056                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1057                 goto bail;
 1058         }
 1059 
 1060 bail:
 1061         crypto_freereq(crp);
 1062         free(cse->uio.uio_iov[0].iov_base, M_XDATA);
 1063 
 1064         return (error);
 1065 }
 1066 
 1067 static int
 1068 cryptodev_cb(void *op)
 1069 {
 1070         struct cryptop *crp = (struct cryptop *) op;
 1071         struct csession *cse = (struct csession *)crp->crp_opaque;
 1072 
 1073         mtx_lock(&cse->lock);
 1074         cse->error = crp->crp_etype;
 1075         wakeup_one(crp);
 1076         mtx_unlock(&cse->lock);
 1077         return (0);
 1078 }
 1079 
 1080 static int
 1081 cryptodevkey_cb(void *op)
 1082 {
 1083         struct cryptkop *krp = (struct cryptkop *) op;
 1084 
 1085         wakeup_one(krp);
 1086         return (0);
 1087 }
 1088 
 1089 static int
 1090 cryptodev_key(struct crypt_kop *kop)
 1091 {
 1092         struct cryptkop *krp = NULL;
 1093         int error = EINVAL;
 1094         int in, out, size, i;
 1095 
 1096         if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
 1097                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1098                 return (EFBIG);
 1099         }
 1100 
 1101         in = kop->crk_iparams;
 1102         out = kop->crk_oparams;
 1103         switch (kop->crk_op) {
 1104         case CRK_MOD_EXP:
 1105                 if (in == 3 && out == 1)
 1106                         break;
 1107                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1108                 return (EINVAL);
 1109         case CRK_MOD_EXP_CRT:
 1110                 if (in == 6 && out == 1)
 1111                         break;
 1112                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1113                 return (EINVAL);
 1114         case CRK_DSA_SIGN:
 1115                 if (in == 5 && out == 2)
 1116                         break;
 1117                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1118                 return (EINVAL);
 1119         case CRK_DSA_VERIFY:
 1120                 if (in == 7 && out == 0)
 1121                         break;
 1122                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1123                 return (EINVAL);
 1124         case CRK_DH_COMPUTE_KEY:
 1125                 if (in == 3 && out == 1)
 1126                         break;
 1127                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1128                 return (EINVAL);
 1129         default:
 1130                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1131                 return (EINVAL);
 1132         }
 1133 
 1134         krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
 1135         if (!krp) {
 1136                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1137                 return (ENOMEM);
 1138         }
 1139         krp->krp_op = kop->crk_op;
 1140         krp->krp_status = kop->crk_status;
 1141         krp->krp_iparams = kop->crk_iparams;
 1142         krp->krp_oparams = kop->crk_oparams;
 1143         krp->krp_crid = kop->crk_crid;
 1144         krp->krp_status = 0;
 1145         krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
 1146 
 1147         for (i = 0; i < CRK_MAXPARAM; i++) {
 1148                 if (kop->crk_param[i].crp_nbits > 65536) {
 1149                         /* Limit is the same as in OpenBSD */
 1150                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1151                         goto fail;
 1152                 }
 1153                 krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
 1154         }
 1155         for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
 1156                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
 1157                 if (size == 0)
 1158                         continue;
 1159                 krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
 1160                 if (i >= krp->krp_iparams)
 1161                         continue;
 1162                 error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
 1163                 if (error) {
 1164                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1165                         goto fail;
 1166                 }
 1167         }
 1168 
 1169         error = crypto_kdispatch(krp);
 1170         if (error) {
 1171                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1172                 goto fail;
 1173         }
 1174         error = tsleep(krp, PSOCK, "crydev", 0);
 1175         if (error) {
 1176                 /* XXX can this happen?  if so, how do we recover? */
 1177                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1178                 goto fail;
 1179         }
 1180         
 1181         kop->crk_crid = krp->krp_crid;          /* device that did the work */
 1182         if (krp->krp_status != 0) {
 1183                 error = krp->krp_status;
 1184                 SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1185                 goto fail;
 1186         }
 1187 
 1188         for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
 1189                 size = (krp->krp_param[i].crp_nbits + 7) / 8;
 1190                 if (size == 0)
 1191                         continue;
 1192                 error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
 1193                 if (error) {
 1194                         SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
 1195                         goto fail;
 1196                 }
 1197         }
 1198 
 1199 fail:
 1200         if (krp) {
 1201                 kop->crk_status = krp->krp_status;
 1202                 for (i = 0; i < CRK_MAXPARAM; i++) {
 1203                         if (krp->krp_param[i].crp_p)
 1204                                 free(krp->krp_param[i].crp_p, M_XDATA);
 1205                 }
 1206                 free(krp, M_XDATA);
 1207         }
 1208         return (error);
 1209 }
 1210 
 1211 static int
 1212 cryptodev_find(struct crypt_find_op *find)
 1213 {
 1214         device_t dev;
 1215         size_t fnlen = sizeof find->name;
 1216 
 1217         if (find->crid != -1) {
 1218                 dev = crypto_find_device_byhid(find->crid);
 1219                 if (dev == NULL)
 1220                         return (ENOENT);
 1221                 strncpy(find->name, device_get_nameunit(dev), fnlen);
 1222                 find->name[fnlen - 1] = '\x';
 1223         } else {
 1224                 find->name[fnlen - 1] = '\x';
 1225                 find->crid = crypto_find_driver(find->name);
 1226                 if (find->crid == -1)
 1227                         return (ENOENT);
 1228         }
 1229         return (0);
 1230 }
 1231 
 1232 /* ARGSUSED */
 1233 static int
 1234 cryptof_stat(
 1235         struct file *fp,
 1236         struct stat *sb,
 1237         struct ucred *active_cred,
 1238         struct thread *td)
 1239 {
 1240 
 1241         return (EOPNOTSUPP);
 1242 }
 1243 
 1244 /* ARGSUSED */
 1245 static int
 1246 cryptof_close(struct file *fp, struct thread *td)
 1247 {
 1248         struct fcrypt *fcr = fp->f_data;
 1249         struct csession *cse;
 1250 
 1251         while ((cse = TAILQ_FIRST(&fcr->csessions))) {
 1252                 TAILQ_REMOVE(&fcr->csessions, cse, next);
 1253                 (void)csefree(cse);
 1254         }
 1255         free(fcr, M_XDATA);
 1256         fp->f_data = NULL;
 1257         return 0;
 1258 }
 1259 
 1260 static int
 1261 cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
 1262 {
 1263 
 1264         kif->kf_type = KF_TYPE_CRYPTO;
 1265         return (0);
 1266 }
 1267 
 1268 static struct csession *
 1269 csefind(struct fcrypt *fcr, u_int ses)
 1270 {
 1271         struct csession *cse;
 1272 
 1273         TAILQ_FOREACH(cse, &fcr->csessions, next)
 1274                 if (cse->ses == ses)
 1275                         return (cse);
 1276         return (NULL);
 1277 }
 1278 
 1279 static int
 1280 csedelete(struct fcrypt *fcr, struct csession *cse_del)
 1281 {
 1282         struct csession *cse;
 1283 
 1284         TAILQ_FOREACH(cse, &fcr->csessions, next) {
 1285                 if (cse == cse_del) {
 1286                         TAILQ_REMOVE(&fcr->csessions, cse, next);
 1287                         return (1);
 1288                 }
 1289         }
 1290         return (0);
 1291 }
 1292         
 1293 static struct csession *
 1294 cseadd(struct fcrypt *fcr, struct csession *cse)
 1295 {
 1296         TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
 1297         cse->ses = fcr->sesn++;
 1298         return (cse);
 1299 }
 1300 
 1301 struct csession *
 1302 csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
 1303     caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
 1304     struct enc_xform *txform, struct auth_hash *thash)
 1305 {
 1306         struct csession *cse;
 1307 
 1308         cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
 1309         if (cse == NULL)
 1310                 return NULL;
 1311         mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
 1312         cse->key = key;
 1313         cse->keylen = keylen/8;
 1314         cse->mackey = mackey;
 1315         cse->mackeylen = mackeylen/8;
 1316         cse->sid = sid;
 1317         cse->cipher = cipher;
 1318         cse->mac = mac;
 1319         cse->txform = txform;
 1320         cse->thash = thash;
 1321         cseadd(fcr, cse);
 1322         return (cse);
 1323 }
 1324 
 1325 static int
 1326 csefree(struct csession *cse)
 1327 {
 1328         int error;
 1329 
 1330         error = crypto_freesession(cse->sid);
 1331         mtx_destroy(&cse->lock);
 1332         if (cse->key)
 1333                 free(cse->key, M_XDATA);
 1334         if (cse->mackey)
 1335                 free(cse->mackey, M_XDATA);
 1336         free(cse, M_XDATA);
 1337         return (error);
 1338 }
 1339 
 1340 static int
 1341 cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
 1342 {
 1343         return (0);
 1344 }
 1345 
 1346 static int
 1347 cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
 1348 {
 1349         return (EIO);
 1350 }
 1351 
 1352 static int
 1353 cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
 1354 {
 1355         return (EIO);
 1356 }
 1357 
 1358 static int
 1359 cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
 1360 {
 1361         struct file *f;
 1362         struct fcrypt *fcr;
 1363         int fd, error;
 1364 
 1365         switch (cmd) {
 1366         case CRIOGET:
 1367                 fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK);
 1368                 TAILQ_INIT(&fcr->csessions);
 1369                 fcr->sesn = 0;
 1370 
 1371                 error = falloc(td, &f, &fd, 0);
 1372 
 1373                 if (error) {
 1374                         free(fcr, M_XDATA);
 1375                         return (error);
 1376                 }
 1377                 /* falloc automatically provides an extra reference to 'f'. */
 1378                 finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
 1379                 *(u_int32_t *)data = fd;
 1380                 fdrop(f, td);
 1381                 break;
 1382         case CRIOFINDDEV:
 1383                 error = cryptodev_find((struct crypt_find_op *)data);
 1384                 break;
 1385         case CRIOASYMFEAT:
 1386                 error = crypto_getfeat((int *)data);
 1387                 break;
 1388         default:
 1389                 error = EINVAL;
 1390                 break;
 1391         }
 1392         return (error);
 1393 }
 1394 
 1395 static struct cdevsw crypto_cdevsw = {
 1396         .d_version =    D_VERSION,
 1397         .d_flags =      D_NEEDGIANT,
 1398         .d_open =       cryptoopen,
 1399         .d_read =       cryptoread,
 1400         .d_write =      cryptowrite,
 1401         .d_ioctl =      cryptoioctl,
 1402         .d_name =       "crypto",
 1403 };
 1404 static struct cdev *crypto_dev;
 1405 
 1406 /*
 1407  * Initialization code, both for static and dynamic loading.
 1408  */
 1409 static int
 1410 cryptodev_modevent(module_t mod, int type, void *unused)
 1411 {
 1412         switch (type) {
 1413         case MOD_LOAD:
 1414                 if (bootverbose)
 1415                         printf("crypto: <crypto device>\n");
 1416                 crypto_dev = make_dev(&crypto_cdevsw, 0, 
 1417                                       UID_ROOT, GID_WHEEL, 0666,
 1418                                       "crypto");
 1419                 return 0;
 1420         case MOD_UNLOAD:
 1421                 /*XXX disallow if active sessions */
 1422                 destroy_dev(crypto_dev);
 1423                 return 0;
 1424         }
 1425         return EINVAL;
 1426 }
 1427 
 1428 static moduledata_t cryptodev_mod = {
 1429         "cryptodev",
 1430         cryptodev_modevent,
 1431         0
 1432 };
 1433 MODULE_VERSION(cryptodev, 1);
 1434 DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
 1435 MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
 1436 MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);

Cache object: 2b258a71279583ab94ce289ca3452ee0


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