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freebsd-dev/sys/opencrypto/cryptodev.c
John Baldwin 9b774dc0c5 Add support to the crypto framework for separate AAD buffers. 
This permits requests to provide the AAD in a separate side buffer
instead of as a region in the crypto request input buffer.  This is
useful when the main data buffer might not contain the full AAD
(e.g. for TLS or IPsec with ESN).

Unlike separate IVs which are constrained in size and stored in an
array in struct cryptop, separate AAD is provided by the caller
setting a new crp_aad pointer to the buffer.  The caller must ensure
the pointer remains valid and the buffer contents static until the
request is completed (e.g. when the callback routine is invoked).

As with separate output buffers, not all drivers support this feature.
Consumers must request use of this feature via a new session flag.

To aid in driver testing, kern.crypto.cryptodev_separate_aad can be
set to force /dev/crypto requests to use a separate AAD buffer.

Discussed with:	cem
Sponsored by:	Chelsio Communications
Differential Revision:	https://reviews.freebsd.org/D25288
2020-06-22 23:20:43 +00:00

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/* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
/*-
* Copyright (c) 2001 Theo de Raadt
* Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
* Copyright (c) 2014 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by John-Mark Gurney
* under sponsorship of the FreeBSD Foundation and
* Rubicon Communications, LLC (Netgate).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Effort sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F30602-01-2-0537.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/errno.h>
#include <sys/random.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/fcntl.h>
#include <sys/bus.h>
#include <sys/user.h>
#include <sys/sdt.h>
#include <opencrypto/cryptodev.h>
#include <opencrypto/xform.h>
SDT_PROVIDER_DECLARE(opencrypto);
SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
#ifdef COMPAT_FREEBSD32
#include <sys/mount.h>
#include <compat/freebsd32/freebsd32.h>
struct session_op32 {
u_int32_t cipher;
u_int32_t mac;
u_int32_t keylen;
u_int32_t key;
int mackeylen;
u_int32_t mackey;
u_int32_t ses;
};
struct session2_op32 {
u_int32_t cipher;
u_int32_t mac;
u_int32_t keylen;
u_int32_t key;
int mackeylen;
u_int32_t mackey;
u_int32_t ses;
int crid;
int pad[4];
};
struct crypt_op32 {
u_int32_t ses;
u_int16_t op;
u_int16_t flags;
u_int len;
u_int32_t src, dst;
u_int32_t mac;
u_int32_t iv;
};
struct crparam32 {
u_int32_t crp_p;
u_int crp_nbits;
};
struct crypt_kop32 {
u_int crk_op;
u_int crk_status;
u_short crk_iparams;
u_short crk_oparams;
u_int crk_crid;
struct crparam32 crk_param[CRK_MAXPARAM];
};
struct cryptotstat32 {
struct timespec32 acc;
struct timespec32 min;
struct timespec32 max;
u_int32_t count;
};
struct cryptostats32 {
u_int32_t cs_ops;
u_int32_t cs_errs;
u_int32_t cs_kops;
u_int32_t cs_kerrs;
u_int32_t cs_intrs;
u_int32_t cs_rets;
u_int32_t cs_blocks;
u_int32_t cs_kblocks;
struct cryptotstat32 cs_invoke;
struct cryptotstat32 cs_done;
struct cryptotstat32 cs_cb;
struct cryptotstat32 cs_finis;
};
#define CIOCGSESSION32 _IOWR('c', 101, struct session_op32)
#define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32)
#define CIOCKEY32 _IOWR('c', 104, struct crypt_kop32)
#define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
#define CIOCKEY232 _IOWR('c', 107, struct crypt_kop32)
static void
session_op_from_32(const struct session_op32 *from, struct session_op *to)
{
CP(*from, *to, cipher);
CP(*from, *to, mac);
CP(*from, *to, keylen);
PTRIN_CP(*from, *to, key);
CP(*from, *to, mackeylen);
PTRIN_CP(*from, *to, mackey);
CP(*from, *to, ses);
}
static void
session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
{
session_op_from_32((const struct session_op32 *)from,
(struct session_op *)to);
CP(*from, *to, crid);
}
static void
session_op_to_32(const struct session_op *from, struct session_op32 *to)
{
CP(*from, *to, cipher);
CP(*from, *to, mac);
CP(*from, *to, keylen);
PTROUT_CP(*from, *to, key);
CP(*from, *to, mackeylen);
PTROUT_CP(*from, *to, mackey);
CP(*from, *to, ses);
}
static void
session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
{
session_op_to_32((const struct session_op *)from,
(struct session_op32 *)to);
CP(*from, *to, crid);
}
static void
crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
{
CP(*from, *to, ses);
CP(*from, *to, op);
CP(*from, *to, flags);
CP(*from, *to, len);
PTRIN_CP(*from, *to, src);
PTRIN_CP(*from, *to, dst);
PTRIN_CP(*from, *to, mac);
PTRIN_CP(*from, *to, iv);
}
static void
crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
{
CP(*from, *to, ses);
CP(*from, *to, op);
CP(*from, *to, flags);
CP(*from, *to, len);
PTROUT_CP(*from, *to, src);
PTROUT_CP(*from, *to, dst);
PTROUT_CP(*from, *to, mac);
PTROUT_CP(*from, *to, iv);
}
static void
crparam_from_32(const struct crparam32 *from, struct crparam *to)
{
PTRIN_CP(*from, *to, crp_p);
CP(*from, *to, crp_nbits);
}
static void
crparam_to_32(const struct crparam *from, struct crparam32 *to)
{
PTROUT_CP(*from, *to, crp_p);
CP(*from, *to, crp_nbits);
}
static void
crypt_kop_from_32(const struct crypt_kop32 *from, struct crypt_kop *to)
{
int i;
CP(*from, *to, crk_op);
CP(*from, *to, crk_status);
CP(*from, *to, crk_iparams);
CP(*from, *to, crk_oparams);
CP(*from, *to, crk_crid);
for (i = 0; i < CRK_MAXPARAM; i++)
crparam_from_32(&from->crk_param[i], &to->crk_param[i]);
}
static void
crypt_kop_to_32(const struct crypt_kop *from, struct crypt_kop32 *to)
{
int i;
CP(*from, *to, crk_op);
CP(*from, *to, crk_status);
CP(*from, *to, crk_iparams);
CP(*from, *to, crk_oparams);
CP(*from, *to, crk_crid);
for (i = 0; i < CRK_MAXPARAM; i++)
crparam_to_32(&from->crk_param[i], &to->crk_param[i]);
}
#endif
struct csession {
TAILQ_ENTRY(csession) next;
crypto_session_t cses;
volatile u_int refs;
u_int32_t ses;
struct mtx lock; /* for op submission */
struct enc_xform *txform;
int hashsize;
int ivsize;
int mode;
void *key;
void *mackey;
};
struct cryptop_data {
struct csession *cse;
char *buf;
char *obuf;
char *aad;
bool done;
};
struct fcrypt {
TAILQ_HEAD(csessionlist, csession) csessions;
int sesn;
struct mtx lock;
};
static bool use_outputbuffers;
SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_use_output, CTLFLAG_RW,
&use_outputbuffers, 0,
"Use separate output buffers for /dev/crypto requests.");
static bool use_separate_aad;
SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_separate_aad, CTLFLAG_RW,
&use_separate_aad, 0,
"Use separate AAD buffer for /dev/crypto requests.");
static int cryptof_ioctl(struct file *, u_long, void *,
struct ucred *, struct thread *);
static int cryptof_stat(struct file *, struct stat *,
struct ucred *, struct thread *);
static int cryptof_close(struct file *, struct thread *);
static int cryptof_fill_kinfo(struct file *, struct kinfo_file *,
struct filedesc *);
static struct fileops cryptofops = {
.fo_read = invfo_rdwr,
.fo_write = invfo_rdwr,
.fo_truncate = invfo_truncate,
.fo_ioctl = cryptof_ioctl,
.fo_poll = invfo_poll,
.fo_kqfilter = invfo_kqfilter,
.fo_stat = cryptof_stat,
.fo_close = cryptof_close,
.fo_chmod = invfo_chmod,
.fo_chown = invfo_chown,
.fo_sendfile = invfo_sendfile,
.fo_fill_kinfo = cryptof_fill_kinfo,
};
static struct csession *csefind(struct fcrypt *, u_int);
static bool csedelete(struct fcrypt *, u_int);
static struct csession *csecreate(struct fcrypt *, crypto_session_t,
struct crypto_session_params *, struct enc_xform *, void *,
struct auth_hash *, void *);
static void csefree(struct csession *);
static int cryptodev_op(struct csession *, struct crypt_op *,
struct ucred *, struct thread *td);
static int cryptodev_aead(struct csession *, struct crypt_aead *,
struct ucred *, struct thread *);
static int cryptodev_key(struct crypt_kop *);
static int cryptodev_find(struct crypt_find_op *);
/*
* Check a crypto identifier to see if it requested
* a software device/driver. This can be done either
* by device name/class or through search constraints.
*/
static int
checkforsoftware(int *cridp)
{
int crid;
crid = *cridp;
if (!crypto_devallowsoft) {
if (crid & CRYPTOCAP_F_SOFTWARE) {
if (crid & CRYPTOCAP_F_HARDWARE) {
*cridp = CRYPTOCAP_F_HARDWARE;
return 0;
}
return EINVAL;
}
if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
(crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
return EINVAL;
}
return 0;
}
/* ARGSUSED */
static int
cryptof_ioctl(
struct file *fp,
u_long cmd,
void *data,
struct ucred *active_cred,
struct thread *td)
{
#define SES2(p) ((struct session2_op *)p)
struct crypto_session_params csp;
struct fcrypt *fcr = fp->f_data;
struct csession *cse;
struct session_op *sop;
struct crypt_op *cop;
struct crypt_aead *caead;
struct enc_xform *txform = NULL;
struct auth_hash *thash = NULL;
void *key = NULL;
void *mackey = NULL;
struct crypt_kop *kop;
crypto_session_t cses;
u_int32_t ses;
int error = 0, crid;
#ifdef COMPAT_FREEBSD32
struct session2_op sopc;
struct crypt_op copc;
struct crypt_kop kopc;
#endif
switch (cmd) {
case CIOCGSESSION:
case CIOCGSESSION2:
#ifdef COMPAT_FREEBSD32
case CIOCGSESSION32:
case CIOCGSESSION232:
if (cmd == CIOCGSESSION32) {
session_op_from_32(data, (struct session_op *)&sopc);
sop = (struct session_op *)&sopc;
} else if (cmd == CIOCGSESSION232) {
session2_op_from_32(data, &sopc);
sop = (struct session_op *)&sopc;
} else
#endif
sop = (struct session_op *)data;
switch (sop->cipher) {
case 0:
break;
case CRYPTO_AES_CBC:
txform = &enc_xform_rijndael128;
break;
case CRYPTO_AES_XTS:
txform = &enc_xform_aes_xts;
break;
case CRYPTO_NULL_CBC:
txform = &enc_xform_null;
break;
case CRYPTO_CAMELLIA_CBC:
txform = &enc_xform_camellia;
break;
case CRYPTO_AES_ICM:
txform = &enc_xform_aes_icm;
break;
case CRYPTO_AES_NIST_GCM_16:
txform = &enc_xform_aes_nist_gcm;
break;
case CRYPTO_CHACHA20:
txform = &enc_xform_chacha20;
break;
case CRYPTO_AES_CCM_16:
txform = &enc_xform_ccm;
break;
default:
CRYPTDEB("invalid cipher");
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
switch (sop->mac) {
case 0:
break;
case CRYPTO_POLY1305:
thash = &auth_hash_poly1305;
break;
case CRYPTO_SHA1_HMAC:
thash = &auth_hash_hmac_sha1;
break;
case CRYPTO_SHA2_224_HMAC:
thash = &auth_hash_hmac_sha2_224;
break;
case CRYPTO_SHA2_256_HMAC:
thash = &auth_hash_hmac_sha2_256;
break;
case CRYPTO_SHA2_384_HMAC:
thash = &auth_hash_hmac_sha2_384;
break;
case CRYPTO_SHA2_512_HMAC:
thash = &auth_hash_hmac_sha2_512;
break;
case CRYPTO_RIPEMD160_HMAC:
thash = &auth_hash_hmac_ripemd_160;
break;
#ifdef COMPAT_FREEBSD12
case CRYPTO_AES_128_NIST_GMAC:
case CRYPTO_AES_192_NIST_GMAC:
case CRYPTO_AES_256_NIST_GMAC:
/* Should always be paired with GCM. */
if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
CRYPTDEB("GMAC without GCM");
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
return (EINVAL);
}
break;
#endif
case CRYPTO_AES_NIST_GMAC:
switch (sop->mackeylen * 8) {
case 128:
thash = &auth_hash_nist_gmac_aes_128;
break;
case 192:
thash = &auth_hash_nist_gmac_aes_192;
break;
case 256:
thash = &auth_hash_nist_gmac_aes_256;
break;
default:
CRYPTDEB("invalid GMAC key length");
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
return (EINVAL);
}
break;
case CRYPTO_AES_CCM_CBC_MAC:
switch (sop->mackeylen) {
case 16:
thash = &auth_hash_ccm_cbc_mac_128;
break;
case 24:
thash = &auth_hash_ccm_cbc_mac_192;
break;
case 32:
thash = &auth_hash_ccm_cbc_mac_256;
break;
default:
CRYPTDEB("Invalid CBC MAC key size %d",
sop->keylen);
SDT_PROBE1(opencrypto, dev, ioctl,
error, __LINE__);
return (EINVAL);
}
break;
case CRYPTO_SHA1:
thash = &auth_hash_sha1;
break;
case CRYPTO_SHA2_224:
thash = &auth_hash_sha2_224;
break;
case CRYPTO_SHA2_256:
thash = &auth_hash_sha2_256;
break;
case CRYPTO_SHA2_384:
thash = &auth_hash_sha2_384;
break;
case CRYPTO_SHA2_512:
thash = &auth_hash_sha2_512;
break;
case CRYPTO_NULL_HMAC:
thash = &auth_hash_null;
break;
case CRYPTO_BLAKE2B:
thash = &auth_hash_blake2b;
break;
case CRYPTO_BLAKE2S:
thash = &auth_hash_blake2s;
break;
default:
CRYPTDEB("invalid mac");
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
if (txform == NULL && thash == NULL) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
memset(&csp, 0, sizeof(csp));
if (use_outputbuffers)
csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
if (sop->cipher == CRYPTO_AES_NIST_GCM_16) {
switch (sop->mac) {
#ifdef COMPAT_FREEBSD12
case CRYPTO_AES_128_NIST_GMAC:
case CRYPTO_AES_192_NIST_GMAC:
case CRYPTO_AES_256_NIST_GMAC:
if (sop->keylen != sop->mackeylen) {
SDT_PROBE1(opencrypto, dev, ioctl,
error, __LINE__);
return (EINVAL);
}
break;
#endif
case 0:
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
return (EINVAL);
}
csp.csp_mode = CSP_MODE_AEAD;
} else if (sop->cipher == CRYPTO_AES_CCM_16) {
switch (sop->mac) {
#ifdef COMPAT_FREEBSD12
case CRYPTO_AES_CCM_CBC_MAC:
if (sop->keylen != sop->mackeylen) {
SDT_PROBE1(opencrypto, dev, ioctl,
error, __LINE__);
return (EINVAL);
}
thash = NULL;
break;
#endif
case 0:
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
return (EINVAL);
}
csp.csp_mode = CSP_MODE_AEAD;
} else if (txform && thash)
csp.csp_mode = CSP_MODE_ETA;
else if (txform)
csp.csp_mode = CSP_MODE_CIPHER;
else
csp.csp_mode = CSP_MODE_DIGEST;
switch (csp.csp_mode) {
case CSP_MODE_AEAD:
case CSP_MODE_ETA:
if (use_separate_aad)
csp.csp_flags |= CSP_F_SEPARATE_AAD;
break;
}
if (txform) {
csp.csp_cipher_alg = txform->type;
csp.csp_cipher_klen = sop->keylen;
if (sop->keylen > txform->maxkey ||
sop->keylen < txform->minkey) {
CRYPTDEB("invalid cipher parameters");
error = EINVAL;
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
goto bail;
}
key = malloc(csp.csp_cipher_klen, M_XDATA, M_WAITOK);
error = copyin(sop->key, key, csp.csp_cipher_klen);
if (error) {
CRYPTDEB("invalid key");
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
goto bail;
}
csp.csp_cipher_key = key;
csp.csp_ivlen = txform->ivsize;
}
if (thash) {
csp.csp_auth_alg = thash->type;
csp.csp_auth_klen = sop->mackeylen;
if (sop->mackeylen > thash->keysize ||
sop->mackeylen < 0) {
CRYPTDEB("invalid mac key length");
error = EINVAL;
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
goto bail;
}
if (csp.csp_auth_klen) {
mackey = malloc(csp.csp_auth_klen, M_XDATA,
M_WAITOK);
error = copyin(sop->mackey, mackey,
csp.csp_auth_klen);
if (error) {
CRYPTDEB("invalid mac key");
SDT_PROBE1(opencrypto, dev, ioctl,
error, __LINE__);
goto bail;
}
csp.csp_auth_key = mackey;
}
if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
csp.csp_ivlen = AES_GCM_IV_LEN;
if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
csp.csp_ivlen = AES_CCM_IV_LEN;
}
/* NB: CIOCGSESSION2 has the crid */
if (cmd == CIOCGSESSION2
#ifdef COMPAT_FREEBSD32
|| cmd == CIOCGSESSION232
#endif
) {
crid = SES2(sop)->crid;
error = checkforsoftware(&crid);
if (error) {
CRYPTDEB("checkforsoftware");
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
goto bail;
}
} else
crid = CRYPTOCAP_F_HARDWARE;
error = crypto_newsession(&cses, &csp, crid);
if (error) {
CRYPTDEB("crypto_newsession");
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
cse = csecreate(fcr, cses, &csp, txform, key, thash, mackey);
if (cse == NULL) {
crypto_freesession(cses);
error = EINVAL;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
CRYPTDEB("csecreate");
goto bail;
}
sop->ses = cse->ses;
if (cmd == CIOCGSESSION2
#ifdef COMPAT_FREEBSD32
|| cmd == CIOCGSESSION232
#endif
) {
/* return hardware/driver id */
SES2(sop)->crid = crypto_ses2hid(cse->cses);
}
bail:
if (error) {
free(key, M_XDATA);
free(mackey, M_XDATA);
}
#ifdef COMPAT_FREEBSD32
else {
if (cmd == CIOCGSESSION32)
session_op_to_32(sop, data);
else if (cmd == CIOCGSESSION232)
session2_op_to_32((struct session2_op *)sop,
data);
}
#endif
break;
case CIOCFSESSION:
ses = *(u_int32_t *)data;
if (!csedelete(fcr, ses)) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
break;
case CIOCCRYPT:
#ifdef COMPAT_FREEBSD32
case CIOCCRYPT32:
if (cmd == CIOCCRYPT32) {
cop = &copc;
crypt_op_from_32(data, cop);
} else
#endif
cop = (struct crypt_op *)data;
cse = csefind(fcr, cop->ses);
if (cse == NULL) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
error = cryptodev_op(cse, cop, active_cred, td);
csefree(cse);
#ifdef COMPAT_FREEBSD32
if (error == 0 && cmd == CIOCCRYPT32)
crypt_op_to_32(cop, data);
#endif
break;
case CIOCKEY:
case CIOCKEY2:
#ifdef COMPAT_FREEBSD32
case CIOCKEY32:
case CIOCKEY232:
#endif
if (!crypto_userasymcrypto) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EPERM); /* XXX compat? */
}
#ifdef COMPAT_FREEBSD32
if (cmd == CIOCKEY32 || cmd == CIOCKEY232) {
kop = &kopc;
crypt_kop_from_32(data, kop);
} else
#endif
kop = (struct crypt_kop *)data;
if (cmd == CIOCKEY
#ifdef COMPAT_FREEBSD32
|| cmd == CIOCKEY32
#endif
) {
/* NB: crypto core enforces s/w driver use */
kop->crk_crid =
CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
}
mtx_lock(&Giant);
error = cryptodev_key(kop);
mtx_unlock(&Giant);
#ifdef COMPAT_FREEBSD32
if (cmd == CIOCKEY32 || cmd == CIOCKEY232)
crypt_kop_to_32(kop, data);
#endif
break;
case CIOCASYMFEAT:
if (!crypto_userasymcrypto) {
/*
* NB: if user asym crypto operations are
* not permitted return "no algorithms"
* so well-behaved applications will just
* fallback to doing them in software.
*/
*(int *)data = 0;
} else {
error = crypto_getfeat((int *)data);
if (error)
SDT_PROBE1(opencrypto, dev, ioctl, error,
__LINE__);
}
break;
case CIOCFINDDEV:
error = cryptodev_find((struct crypt_find_op *)data);
break;
case CIOCCRYPTAEAD:
caead = (struct crypt_aead *)data;
cse = csefind(fcr, caead->ses);
if (cse == NULL) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
error = cryptodev_aead(cse, caead, active_cred, td);
csefree(cse);
break;
default:
error = EINVAL;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
break;
}
return (error);
#undef SES2
}
static int cryptodev_cb(struct cryptop *);
static struct cryptop_data *
cod_alloc(struct csession *cse, size_t aad_len, size_t len, struct thread *td)
{
struct cryptop_data *cod;
cod = malloc(sizeof(struct cryptop_data), M_XDATA, M_WAITOK | M_ZERO);
cod->cse = cse;
if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_AAD) {
if (aad_len != 0)
cod->aad = malloc(aad_len, M_XDATA, M_WAITOK);
cod->buf = malloc(len, M_XDATA, M_WAITOK);
} else
cod->buf = malloc(aad_len + len, M_XDATA, M_WAITOK);
if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
cod->obuf = malloc(len, M_XDATA, M_WAITOK);
return (cod);
}
static void
cod_free(struct cryptop_data *cod)
{
free(cod->aad, M_XDATA);
free(cod->obuf, M_XDATA);
free(cod->buf, M_XDATA);
free(cod, M_XDATA);
}
static int
cryptodev_op(
struct csession *cse,
struct crypt_op *cop,
struct ucred *active_cred,
struct thread *td)
{
struct cryptop_data *cod = NULL;
struct cryptop *crp = NULL;
int error;
if (cop->len > 256*1024-4) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (E2BIG);
}
if (cse->txform) {
if (cop->len == 0 || (cop->len % cse->txform->blocksize) != 0) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
}
if (cop->mac && cse->hashsize == 0) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
/*
* The COP_F_CIPHER_FIRST flag predates explicit session
* modes, but the only way it was used was for EtA so allow it
* as long as it is consistent with EtA.
*/
if (cop->flags & COP_F_CIPHER_FIRST) {
if (cop->op != COP_ENCRYPT) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
}
cod = cod_alloc(cse, 0, cop->len + cse->hashsize, td);
crp = crypto_getreq(cse->cses, M_WAITOK);
error = copyin(cop->src, cod->buf, cop->len);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
crp->crp_payload_start = 0;
crp->crp_payload_length = cop->len;
if (cse->hashsize)
crp->crp_digest_start = cop->len;
switch (cse->mode) {
case CSP_MODE_COMPRESS:
switch (cop->op) {
case COP_ENCRYPT:
crp->crp_op = CRYPTO_OP_COMPRESS;
break;
case COP_DECRYPT:
crp->crp_op = CRYPTO_OP_DECOMPRESS;
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = EINVAL;
goto bail;
}
break;
case CSP_MODE_CIPHER:
switch (cop->op) {
case COP_ENCRYPT:
crp->crp_op = CRYPTO_OP_ENCRYPT;
break;
case COP_DECRYPT:
crp->crp_op = CRYPTO_OP_DECRYPT;
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = EINVAL;
goto bail;
}
break;
case CSP_MODE_DIGEST:
switch (cop->op) {
case 0:
case COP_ENCRYPT:
case COP_DECRYPT:
crp->crp_op = CRYPTO_OP_COMPUTE_DIGEST;
if (cod->obuf != NULL)
crp->crp_digest_start = 0;
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = EINVAL;
goto bail;
}
break;
case CSP_MODE_ETA:
switch (cop->op) {
case COP_ENCRYPT:
crp->crp_op = CRYPTO_OP_ENCRYPT |
CRYPTO_OP_COMPUTE_DIGEST;
break;
case COP_DECRYPT:
crp->crp_op = CRYPTO_OP_DECRYPT |
CRYPTO_OP_VERIFY_DIGEST;
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = EINVAL;
goto bail;
}
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = EINVAL;
goto bail;
}
crp->crp_flags = CRYPTO_F_CBIMM | (cop->flags & COP_F_BATCH);
crypto_use_buf(crp, cod->buf, cop->len + cse->hashsize);
if (cod->obuf)
crypto_use_output_buf(crp, cod->obuf, cop->len + cse->hashsize);
crp->crp_callback = cryptodev_cb;
crp->crp_opaque = cod;
if (cop->iv) {
if (cse->ivsize == 0) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = EINVAL;
goto bail;
}
error = copyin(cop->iv, crp->crp_iv, cse->ivsize);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
} else if (cse->ivsize != 0) {
crp->crp_iv_start = 0;
crp->crp_payload_start += cse->ivsize;
crp->crp_payload_length -= cse->ivsize;
cop->dst += cse->ivsize;
}
if (cop->mac != NULL && crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
error = copyin(cop->mac, cod->buf + crp->crp_digest_start,
cse->hashsize);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
}
again:
/*
* Let the dispatch run unlocked, then, interlock against the
* callback before checking if the operation completed and going
* to sleep. This insures drivers don't inherit our lock which
* results in a lock order reversal between crypto_dispatch forced
* entry and the crypto_done callback into us.
*/
error = crypto_dispatch(crp);
if (error != 0) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
mtx_lock(&cse->lock);
while (!cod->done)
mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
mtx_unlock(&cse->lock);
if (crp->crp_etype == EAGAIN) {
crp->crp_etype = 0;
crp->crp_flags &= ~CRYPTO_F_DONE;
cod->done = false;
goto again;
}
if (crp->crp_etype != 0) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = crp->crp_etype;
goto bail;
}
if (cop->dst != NULL) {
error = copyout(cod->obuf != NULL ? cod->obuf :
cod->buf + crp->crp_payload_start, cop->dst,
crp->crp_payload_length);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
}
if (cop->mac != NULL && (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
crp->crp_digest_start, cop->mac, cse->hashsize);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
}
bail:
crypto_freereq(crp);
cod_free(cod);
return (error);
}
static int
cryptodev_aead(
struct csession *cse,
struct crypt_aead *caead,
struct ucred *active_cred,
struct thread *td)
{
struct cryptop_data *cod = NULL;
struct cryptop *crp = NULL;
int error;
if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (E2BIG);
}
if (cse->txform == NULL || cse->hashsize == 0 || caead->tag == NULL ||
(caead->len % cse->txform->blocksize) != 0) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
/*
* The COP_F_CIPHER_FIRST flag predates explicit session
* modes, but the only way it was used was for EtA so allow it
* as long as it is consistent with EtA.
*/
if (caead->flags & COP_F_CIPHER_FIRST) {
if (caead->op != COP_ENCRYPT) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
}
cod = cod_alloc(cse, caead->aadlen, caead->len + cse->hashsize, td);
crp = crypto_getreq(cse->cses, M_WAITOK);
if (cod->aad != NULL)
error = copyin(caead->aad, cod->aad, caead->aadlen);
else
error = copyin(caead->aad, cod->buf, caead->aadlen);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
crp->crp_aad = cod->aad;
crp->crp_aad_start = 0;
crp->crp_aad_length = caead->aadlen;
if (cod->aad != NULL)
crp->crp_payload_start = 0;
else
crp->crp_payload_start = caead->aadlen;
error = copyin(caead->src, cod->buf + crp->crp_payload_start,
caead->len);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
crp->crp_payload_length = caead->len;
if (caead->op == COP_ENCRYPT && cod->obuf != NULL)
crp->crp_digest_start = crp->crp_payload_output_start +
caead->len;
else
crp->crp_digest_start = crp->crp_payload_start + caead->len;
switch (cse->mode) {
case CSP_MODE_AEAD:
case CSP_MODE_ETA:
switch (caead->op) {
case COP_ENCRYPT:
crp->crp_op = CRYPTO_OP_ENCRYPT |
CRYPTO_OP_COMPUTE_DIGEST;
break;
case COP_DECRYPT:
crp->crp_op = CRYPTO_OP_DECRYPT |
CRYPTO_OP_VERIFY_DIGEST;
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = EINVAL;
goto bail;
}
break;
default:
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
error = EINVAL;
goto bail;
}
crp->crp_flags = CRYPTO_F_CBIMM | (caead->flags & COP_F_BATCH);
crypto_use_buf(crp, cod->buf, crp->crp_payload_start + caead->len +
cse->hashsize);
if (cod->obuf != NULL)
crypto_use_output_buf(crp, cod->obuf, caead->len +
cse->hashsize);
crp->crp_callback = cryptodev_cb;
crp->crp_opaque = cod;
if (caead->iv) {
/*
* Permit a 16-byte IV for AES-XTS, but only use the
* first 8 bytes as a block number.
*/
if (cse->mode == CSP_MODE_ETA &&
caead->ivlen == AES_BLOCK_LEN &&
cse->ivsize == AES_XTS_IV_LEN)
caead->ivlen = AES_XTS_IV_LEN;
if (caead->ivlen != cse->ivsize) {
error = EINVAL;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
error = copyin(caead->iv, crp->crp_iv, cse->ivsize);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
crp->crp_flags |= CRYPTO_F_IV_SEPARATE;
} else {
crp->crp_iv_start = crp->crp_payload_start;
crp->crp_payload_start += cse->ivsize;
crp->crp_payload_length -= cse->ivsize;
caead->dst += cse->ivsize;
}
if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) {
error = copyin(caead->tag, cod->buf + crp->crp_digest_start,
cse->hashsize);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
}
again:
/*
* Let the dispatch run unlocked, then, interlock against the
* callback before checking if the operation completed and going
* to sleep. This insures drivers don't inherit our lock which
* results in a lock order reversal between crypto_dispatch forced
* entry and the crypto_done callback into us.
*/
error = crypto_dispatch(crp);
if (error != 0) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
mtx_lock(&cse->lock);
while (!cod->done)
mtx_sleep(cod, &cse->lock, PWAIT, "crydev", 0);
mtx_unlock(&cse->lock);
if (crp->crp_etype == EAGAIN) {
crp->crp_etype = 0;
crp->crp_flags &= ~CRYPTO_F_DONE;
cod->done = false;
goto again;
}
if (crp->crp_etype != 0) {
error = crp->crp_etype;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
if (caead->dst != NULL) {
error = copyout(cod->obuf != NULL ? cod->obuf :
cod->buf + crp->crp_payload_start, caead->dst,
crp->crp_payload_length);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
}
if ((crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) == 0) {
error = copyout((cod->obuf != NULL ? cod->obuf : cod->buf) +
crp->crp_digest_start, caead->tag, cse->hashsize);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto bail;
}
}
bail:
crypto_freereq(crp);
cod_free(cod);
return (error);
}
static int
cryptodev_cb(struct cryptop *crp)
{
struct cryptop_data *cod = crp->crp_opaque;
/*
* Lock to ensure the wakeup() is not missed by the loops
* waiting on cod->done in cryptodev_op() and
* cryptodev_aead().
*/
mtx_lock(&cod->cse->lock);
cod->done = true;
mtx_unlock(&cod->cse->lock);
wakeup(cod);
return (0);
}
static void
cryptodevkey_cb(struct cryptkop *krp)
{
wakeup_one(krp);
}
static int
cryptodev_key(struct crypt_kop *kop)
{
struct cryptkop *krp = NULL;
int error = EINVAL;
int in, out, size, i;
if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EFBIG);
}
in = kop->crk_iparams;
out = kop->crk_oparams;
switch (kop->crk_op) {
case CRK_MOD_EXP:
if (in == 3 && out == 1)
break;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
case CRK_MOD_EXP_CRT:
if (in == 6 && out == 1)
break;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
case CRK_DSA_SIGN:
if (in == 5 && out == 2)
break;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
case CRK_DSA_VERIFY:
if (in == 7 && out == 0)
break;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
case CRK_DH_COMPUTE_KEY:
if (in == 3 && out == 1)
break;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
default:
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (EINVAL);
}
krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK|M_ZERO);
if (!krp) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
return (ENOMEM);
}
krp->krp_op = kop->crk_op;
krp->krp_status = kop->crk_status;
krp->krp_iparams = kop->crk_iparams;
krp->krp_oparams = kop->crk_oparams;
krp->krp_crid = kop->crk_crid;
krp->krp_status = 0;
krp->krp_callback = cryptodevkey_cb;
for (i = 0; i < CRK_MAXPARAM; i++) {
if (kop->crk_param[i].crp_nbits > 65536) {
/* Limit is the same as in OpenBSD */
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto fail;
}
krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
}
for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
size = (krp->krp_param[i].crp_nbits + 7) / 8;
if (size == 0)
continue;
krp->krp_param[i].crp_p = malloc(size, M_XDATA, M_WAITOK);
if (i >= krp->krp_iparams)
continue;
error = copyin(kop->crk_param[i].crp_p, krp->krp_param[i].crp_p, size);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto fail;
}
}
error = crypto_kdispatch(krp);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto fail;
}
error = tsleep(krp, PSOCK, "crydev", 0);
if (error) {
/* XXX can this happen? if so, how do we recover? */
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto fail;
}
kop->crk_crid = krp->krp_hid; /* device that did the work */
if (krp->krp_status != 0) {
error = krp->krp_status;
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto fail;
}
for (i = krp->krp_iparams; i < krp->krp_iparams + krp->krp_oparams; i++) {
size = (krp->krp_param[i].crp_nbits + 7) / 8;
if (size == 0)
continue;
error = copyout(krp->krp_param[i].crp_p, kop->crk_param[i].crp_p, size);
if (error) {
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
goto fail;
}
}
fail:
if (krp) {
kop->crk_status = krp->krp_status;
for (i = 0; i < CRK_MAXPARAM; i++) {
if (krp->krp_param[i].crp_p)
free(krp->krp_param[i].crp_p, M_XDATA);
}
free(krp, M_XDATA);
}
return (error);
}
static int
cryptodev_find(struct crypt_find_op *find)
{
device_t dev;
size_t fnlen = sizeof find->name;
if (find->crid != -1) {
dev = crypto_find_device_byhid(find->crid);
if (dev == NULL)
return (ENOENT);
strncpy(find->name, device_get_nameunit(dev), fnlen);
find->name[fnlen - 1] = '\x0';
} else {
find->name[fnlen - 1] = '\x0';
find->crid = crypto_find_driver(find->name);
if (find->crid == -1)
return (ENOENT);
}
return (0);
}
/* ARGSUSED */
static int
cryptof_stat(
struct file *fp,
struct stat *sb,
struct ucred *active_cred,
struct thread *td)
{
return (EOPNOTSUPP);
}
/* ARGSUSED */
static int
cryptof_close(struct file *fp, struct thread *td)
{
struct fcrypt *fcr = fp->f_data;
struct csession *cse;
while ((cse = TAILQ_FIRST(&fcr->csessions))) {
TAILQ_REMOVE(&fcr->csessions, cse, next);
KASSERT(cse->refs == 1,
("%s: crypto session %p with %d refs", __func__, cse,
cse->refs));
csefree(cse);
}
free(fcr, M_XDATA);
fp->f_data = NULL;
return 0;
}
static int
cryptof_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp)
{
kif->kf_type = KF_TYPE_CRYPTO;
return (0);
}
static struct csession *
csefind(struct fcrypt *fcr, u_int ses)
{
struct csession *cse;
mtx_lock(&fcr->lock);
TAILQ_FOREACH(cse, &fcr->csessions, next) {
if (cse->ses == ses) {
refcount_acquire(&cse->refs);
mtx_unlock(&fcr->lock);
return (cse);
}
}
mtx_unlock(&fcr->lock);
return (NULL);
}
static bool
csedelete(struct fcrypt *fcr, u_int ses)
{
struct csession *cse;
mtx_lock(&fcr->lock);
TAILQ_FOREACH(cse, &fcr->csessions, next) {
if (cse->ses == ses) {
TAILQ_REMOVE(&fcr->csessions, cse, next);
mtx_unlock(&fcr->lock);
csefree(cse);
return (true);
}
}
mtx_unlock(&fcr->lock);
return (false);
}
struct csession *
csecreate(struct fcrypt *fcr, crypto_session_t cses,
struct crypto_session_params *csp, struct enc_xform *txform,
void *key, struct auth_hash *thash, void *mackey)
{
struct csession *cse;
cse = malloc(sizeof(struct csession), M_XDATA, M_NOWAIT | M_ZERO);
if (cse == NULL)
return NULL;
mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
refcount_init(&cse->refs, 1);
cse->key = key;
cse->mackey = mackey;
cse->mode = csp->csp_mode;
cse->cses = cses;
cse->txform = txform;
if (thash != NULL)
cse->hashsize = thash->hashsize;
else if (csp->csp_cipher_alg == CRYPTO_AES_NIST_GCM_16)
cse->hashsize = AES_GMAC_HASH_LEN;
else if (csp->csp_cipher_alg == CRYPTO_AES_CCM_16)
cse->hashsize = AES_CBC_MAC_HASH_LEN;
cse->ivsize = csp->csp_ivlen;
mtx_lock(&fcr->lock);
TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
cse->ses = fcr->sesn++;
mtx_unlock(&fcr->lock);
return (cse);
}
static void
csefree(struct csession *cse)
{
if (!refcount_release(&cse->refs))
return;
crypto_freesession(cse->cses);
mtx_destroy(&cse->lock);
if (cse->key)
free(cse->key, M_XDATA);
if (cse->mackey)
free(cse->mackey, M_XDATA);
free(cse, M_XDATA);
}
static int
cryptoioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
{
struct file *f;
struct fcrypt *fcr;
int fd, error;
switch (cmd) {
case CRIOGET:
error = falloc_noinstall(td, &f);
if (error)
break;
fcr = malloc(sizeof(struct fcrypt), M_XDATA, M_WAITOK | M_ZERO);
TAILQ_INIT(&fcr->csessions);
mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
finit(f, FREAD | FWRITE, DTYPE_CRYPTO, fcr, &cryptofops);
error = finstall(td, f, &fd, 0, NULL);
if (error) {
mtx_destroy(&fcr->lock);
free(fcr, M_XDATA);
} else
*(uint32_t *)data = fd;
fdrop(f, td);
break;
case CRIOFINDDEV:
error = cryptodev_find((struct crypt_find_op *)data);
break;
case CRIOASYMFEAT:
error = crypto_getfeat((int *)data);
break;
default:
error = EINVAL;
break;
}
return (error);
}
static struct cdevsw crypto_cdevsw = {
.d_version = D_VERSION,
.d_ioctl = cryptoioctl,
.d_name = "crypto",
};
static struct cdev *crypto_dev;
/*
* Initialization code, both for static and dynamic loading.
*/
static int
cryptodev_modevent(module_t mod, int type, void *unused)
{
switch (type) {
case MOD_LOAD:
if (bootverbose)
printf("crypto: <crypto device>\n");
crypto_dev = make_dev(&crypto_cdevsw, 0,
UID_ROOT, GID_WHEEL, 0666,
"crypto");
return 0;
case MOD_UNLOAD:
/*XXX disallow if active sessions */
destroy_dev(crypto_dev);
return 0;
}
return EINVAL;
}
static moduledata_t cryptodev_mod = {
"cryptodev",
cryptodev_modevent,
0
};
MODULE_VERSION(cryptodev, 1);
DECLARE_MODULE(cryptodev, cryptodev_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
MODULE_DEPEND(cryptodev, crypto, 1, 1, 1);
MODULE_DEPEND(cryptodev, zlib, 1, 1, 1);
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