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NetBSD/sys/opencrypto/cryptodev.c

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/* $NetBSD: cryptodev.c,v 1.101 2019/06/13 02:02:45 christos Exp $ */
/* $FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.4.2.4 2003/06/03 00:09:02 sam Exp $ */
/* $OpenBSD: cryptodev.c,v 1.53 2002/07/10 22:21:30 mickey Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Coyote Point Systems, Inc.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Copyright (c) 2001 Theo de Raadt
*
* 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>
__KERNEL_RCSID(0, "$NetBSD: cryptodev.c,v 1.101 2019/06/13 02:02:45 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kmem.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/pool.h>
#include <sys/sysctl.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/errno.h>
#include <sys/md5.h>
#include <sys/sha1.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/kauth.h>
#include <sys/select.h>
#include <sys/poll.h>
#include <sys/atomic.h>
#include <sys/stat.h>
#include <sys/module.h>
#include <sys/compat_stub.h>
#ifdef _KERNEL_OPT
#include "opt_ocf.h"
#include "opt_compat_netbsd.h"
#endif
#include <opencrypto/cryptodev.h>
#include <opencrypto/ocryptodev.h>
#include <opencrypto/cryptodev_internal.h>
#include <opencrypto/xform.h>
#include "ioconf.h"
kmutex_t cryptodev_mtx;
struct csession {
TAILQ_ENTRY(csession) next;
u_int64_t sid;
u_int32_t ses;
u_int32_t cipher; /* note: shares name space in crd_alg */
const struct enc_xform *txform;
u_int32_t mac; /* note: shares name space in crd_alg */
const struct auth_hash *thash;
u_int32_t comp_alg; /* note: shares name space in crd_alg */
const struct comp_algo *tcomp;
void * key;
int keylen;
u_char tmp_iv[EALG_MAX_BLOCK_LEN];
void * mackey;
int mackeylen;
u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
struct iovec iovec[1]; /* user requests never have more */
struct uio uio;
int error;
};
struct fcrypt {
TAILQ_HEAD(csessionlist, csession) csessions;
TAILQ_HEAD(crprethead, cryptop) crp_ret_mq;
TAILQ_HEAD(krprethead, cryptkop) crp_ret_mkq;
int sesn;
struct selinfo sinfo;
u_int32_t requestid;
struct timespec atime;
struct timespec mtime;
struct timespec btime;
};
/* For our fixed-size allocations */
static struct pool fcrpl;
static struct pool csepl;
/* Declaration of master device (fd-cloning/ctxt-allocating) entrypoints */
static int cryptoopen(dev_t dev, int flag, int mode, struct lwp *l);
static int cryptoread(dev_t dev, struct uio *uio, int ioflag);
static int cryptowrite(dev_t dev, struct uio *uio, int ioflag);
static int cryptoselect(dev_t dev, int rw, struct lwp *l);
static int crypto_refcount = 0; /* Prevent detaching while in use */
/* Declaration of cloned-device (per-ctxt) entrypoints */
static int cryptof_read(struct file *, off_t *, struct uio *,
kauth_cred_t, int);
static int cryptof_write(struct file *, off_t *, struct uio *,
kauth_cred_t, int);
static int cryptof_ioctl(struct file *, u_long, void *);
static int cryptof_close(struct file *);
static int cryptof_poll(struct file *, int);
static int cryptof_stat(struct file *, struct stat *);
static const struct fileops cryptofops = {
.fo_name = "cryptof",
.fo_read = cryptof_read,
.fo_write = cryptof_write,
.fo_ioctl = cryptof_ioctl,
.fo_fcntl = fnullop_fcntl,
.fo_poll = cryptof_poll,
.fo_stat = cryptof_stat,
.fo_close = cryptof_close,
.fo_kqfilter = fnullop_kqfilter,
.fo_restart = fnullop_restart,
};
struct csession *cryptodev_csefind(struct fcrypt *, u_int);
static struct csession *csefind(struct fcrypt *, u_int);
static int csedelete(struct fcrypt *, struct csession *);
static struct csession *cseadd(struct fcrypt *, struct csession *);
static struct csession *csecreate(struct fcrypt *, u_int64_t, void *,
u_int64_t, void *, u_int64_t, u_int32_t, u_int32_t, u_int32_t,
const struct enc_xform *, const struct auth_hash *,
const struct comp_algo *);
static int csefree(struct csession *);
static int cryptodev_key(struct crypt_kop *);
static int cryptodev_mkey(struct fcrypt *, struct crypt_n_kop *, int);
static int cryptodev_msessionfin(struct fcrypt *, int, u_int32_t *);
static int cryptodev_cb(void *);
static int cryptodevkey_cb(void *);
static int cryptodev_mcb(void *);
static int cryptodevkey_mcb(void *);
static int cryptodev_getmstatus(struct fcrypt *, struct crypt_result *,
int);
static int cryptodev_getstatus(struct fcrypt *, struct crypt_result *);
/*
* sysctl-able control variables for /dev/crypto now defined in crypto.c:
* crypto_usercrypto, crypto_userasmcrypto, crypto_devallowsoft.
*/
/* ARGSUSED */
int
cryptof_read(file_t *fp, off_t *poff,
struct uio *uio, kauth_cred_t cred, int flags)
{
return EIO;
}
/* ARGSUSED */
int
cryptof_write(file_t *fp, off_t *poff,
struct uio *uio, kauth_cred_t cred, int flags)
{
return EIO;
}
/* ARGSUSED */
int
cryptof_ioctl(struct file *fp, u_long cmd, void *data)
{
struct fcrypt *fcr = fp->f_fcrypt;
struct csession *cse;
struct session_op *sop;
struct session_n_op *snop;
struct crypt_op *cop;
struct crypt_mop *mop;
struct crypt_mkop *mkop;
struct crypt_n_op *cnop;
struct crypt_n_kop *knop;
struct crypt_sgop *sgop;
struct crypt_sfop *sfop;
struct cryptret *crypt_ret;
struct crypt_result *crypt_res;
u_int32_t ses;
u_int32_t *sesid;
int error = 0;
size_t count;
/* backwards compatibility */
file_t *criofp;
struct fcrypt *criofcr;
int criofd;
mutex_enter(&cryptodev_mtx);
getnanotime(&fcr->atime);
mutex_exit(&cryptodev_mtx);
switch (cmd) {
case CRIOGET: /* XXX deprecated, remove after 5.0 */
if ((error = fd_allocfile(&criofp, &criofd)) != 0)
return error;
criofcr = pool_get(&fcrpl, PR_WAITOK);
mutex_enter(&cryptodev_mtx);
TAILQ_INIT(&criofcr->csessions);
TAILQ_INIT(&criofcr->crp_ret_mq);
TAILQ_INIT(&criofcr->crp_ret_mkq);
selinit(&criofcr->sinfo);
/*
* Don't ever return session 0, to allow detection of
* failed creation attempts with multi-create ioctl.
*/
criofcr->sesn = 1;
criofcr->requestid = 1;
crypto_refcount++;
mutex_exit(&cryptodev_mtx);
(void)fd_clone(criofp, criofd, (FREAD|FWRITE),
&cryptofops, criofcr);
*(u_int32_t *)data = criofd;
return error;
break;
case CIOCGSESSION:
sop = (struct session_op *)data;
error = cryptodev_session(fcr, sop);
break;
case CIOCNGSESSION:
sgop = (struct crypt_sgop *)data;
if (sgop->count <= 0
|| SIZE_MAX / sizeof(struct session_n_op) <= sgop->count) {
error = EINVAL;
break;
}
snop = kmem_alloc((sgop->count *
sizeof(struct session_n_op)), KM_SLEEP);
error = copyin(sgop->sessions, snop, sgop->count *
sizeof(struct session_n_op));
if (error) {
goto mbail;
}
mutex_enter(&cryptodev_mtx);
fcr->mtime = fcr->atime;
mutex_exit(&cryptodev_mtx);
error = cryptodev_msession(fcr, snop, sgop->count);
if (error) {
goto mbail;
}
error = copyout(snop, sgop->sessions, sgop->count *
sizeof(struct session_n_op));
mbail:
kmem_free(snop, sgop->count * sizeof(struct session_n_op));
break;
case CIOCFSESSION:
mutex_enter(&cryptodev_mtx);
fcr->mtime = fcr->atime;
ses = *(u_int32_t *)data;
cse = csefind(fcr, ses);
if (cse == NULL) {
mutex_exit(&cryptodev_mtx);
return EINVAL;
}
csedelete(fcr, cse);
mutex_exit(&cryptodev_mtx);
error = csefree(cse);
break;
case CIOCNFSESSION:
mutex_enter(&cryptodev_mtx);
fcr->mtime = fcr->atime;
mutex_exit(&cryptodev_mtx);
sfop = (struct crypt_sfop *)data;
if (sfop->count <= 0
|| SIZE_MAX / sizeof(u_int32_t) <= sfop->count) {
error = EINVAL;
break;
}
sesid = kmem_alloc((sfop->count * sizeof(u_int32_t)),
KM_SLEEP);
error = copyin(sfop->sesid, sesid,
(sfop->count * sizeof(u_int32_t)));
if (!error) {
error = cryptodev_msessionfin(fcr, sfop->count, sesid);
}
kmem_free(sesid, (sfop->count * sizeof(u_int32_t)));
break;
case CIOCCRYPT:
mutex_enter(&cryptodev_mtx);
fcr->mtime = fcr->atime;
cop = (struct crypt_op *)data;
cse = csefind(fcr, cop->ses);
mutex_exit(&cryptodev_mtx);
if (cse == NULL) {
DPRINTF("csefind failed\n");
return EINVAL;
}
error = cryptodev_op(cse, cop, curlwp);
DPRINTF("cryptodev_op error = %d\n", error);
break;
case CIOCNCRYPTM:
mutex_enter(&cryptodev_mtx);
fcr->mtime = fcr->atime;
mutex_exit(&cryptodev_mtx);
mop = (struct crypt_mop *)data;
if (mop->count <= 0
|| SIZE_MAX / sizeof(struct crypt_n_op) <= mop->count) {
error = EINVAL;
break;
}
cnop = kmem_alloc((mop->count * sizeof(struct crypt_n_op)),
KM_SLEEP);
error = copyin(mop->reqs, cnop,
(mop->count * sizeof(struct crypt_n_op)));
if(!error) {
error = cryptodev_mop(fcr, cnop, mop->count, curlwp);
if (!error) {
error = copyout(cnop, mop->reqs,
(mop->count * sizeof(struct crypt_n_op)));
}
}
kmem_free(cnop, (mop->count * sizeof(struct crypt_n_op)));
break;
case CIOCKEY:
error = cryptodev_key((struct crypt_kop *)data);
DPRINTF("cryptodev_key error = %d\n", error);
break;
case CIOCNFKEYM:
mutex_enter(&cryptodev_mtx);
fcr->mtime = fcr->atime;
mutex_exit(&cryptodev_mtx);
mkop = (struct crypt_mkop *)data;
if (mkop->count <= 0
|| SIZE_MAX / sizeof(struct crypt_n_kop) <= mkop->count) {
error = EINVAL;
break;
}
knop = kmem_alloc((mkop->count * sizeof(struct crypt_n_kop)),
KM_SLEEP);
error = copyin(mkop->reqs, knop,
(mkop->count * sizeof(struct crypt_n_kop)));
if (!error) {
error = cryptodev_mkey(fcr, knop, mkop->count);
if (!error)
error = copyout(knop, mkop->reqs,
(mkop->count * sizeof(struct crypt_n_kop)));
}
kmem_free(knop, (mkop->count * sizeof(struct crypt_n_kop)));
break;
case CIOCASYMFEAT:
error = crypto_getfeat((int *)data);
break;
case CIOCNCRYPTRETM:
mutex_enter(&cryptodev_mtx);
fcr->mtime = fcr->atime;
mutex_exit(&cryptodev_mtx);
crypt_ret = (struct cryptret *)data;
count = crypt_ret->count;
if (count <= 0
|| SIZE_MAX / sizeof(struct crypt_result) <= count) {
error = EINVAL;
break;
}
crypt_res = kmem_alloc((count * sizeof(struct crypt_result)),
KM_SLEEP);
error = copyin(crypt_ret->results, crypt_res,
(count * sizeof(struct crypt_result)));
if (error)
goto reterr;
crypt_ret->count = cryptodev_getmstatus(fcr, crypt_res,
crypt_ret->count);
/* sanity check count */
if (crypt_ret->count > count) {
printf("%s.%d: error returned count %zd > original "
" count %zd\n",
__FILE__, __LINE__, crypt_ret->count, count);
crypt_ret->count = count;
}
error = copyout(crypt_res, crypt_ret->results,
(crypt_ret->count * sizeof(struct crypt_result)));
reterr:
kmem_free(crypt_res, (count * sizeof(struct crypt_result)));
break;
case CIOCNCRYPTRET:
error = cryptodev_getstatus(fcr, (struct crypt_result *)data);
break;
default:
/* Check for backward compatible commands */
MODULE_HOOK_CALL(ocryptof_50_hook, (fp, cmd, data),
enosys(), error);
if (error == ENOSYS)
error = EINVAL;
return error;
}
return error;
}
int
cryptodev_op(struct csession *cse, struct crypt_op *cop, struct lwp *l)
{
struct cryptop *crp = NULL;
struct cryptodesc *crde = NULL, *crda = NULL, *crdc = NULL;
int error;
int iov_len = cop->len;
int flags=0;
int dst_len; /* copyout size */
if (cop->len > 256*1024-4)
return E2BIG;
if (cse->txform) {
if (cop->len < cse->txform->blocksize
+ (cop->iv ? 0 : cse->txform->ivsize) ||
(cop->len - (cop->iv ? 0 : cse->txform->ivsize))
% cse->txform->blocksize != 0)
return EINVAL;
}
DPRINTF("cryptodev_op[%u]: iov_len %d\n",
CRYPTO_SESID2LID(cse->sid), iov_len);
if ((cse->tcomp) && cop->dst_len) {
if (iov_len < cop->dst_len) {
/* Need larger iov to deal with decompress */
iov_len = cop->dst_len;
}
DPRINTF("cryptodev_op: iov_len -> %d for decompress\n", iov_len);
}
(void)memset(&cse->uio, 0, sizeof(cse->uio));
cse->uio.uio_iovcnt = 1;
cse->uio.uio_resid = 0;
cse->uio.uio_rw = UIO_WRITE;
cse->uio.uio_iov = cse->iovec;
UIO_SETUP_SYSSPACE(&cse->uio);
memset(&cse->iovec, 0, sizeof(cse->iovec));
/* the iov needs to be big enough to handle the uncompressed
* data.... */
cse->uio.uio_iov[0].iov_len = iov_len;
if (iov_len > 0)
cse->uio.uio_iov[0].iov_base = kmem_alloc(iov_len, KM_SLEEP);
cse->uio.uio_resid = cse->uio.uio_iov[0].iov_len;
DPRINTF("lid[%u]: uio.iov_base %p malloced %d bytes\n",
CRYPTO_SESID2LID(cse->sid),
cse->uio.uio_iov[0].iov_base, iov_len);
crp = crypto_getreq((cse->tcomp != NULL) + (cse->txform != NULL) + (cse->thash != NULL));
if (crp == NULL) {
error = ENOMEM;
goto bail;
}
DPRINTF("lid[%u]: crp %p\n", CRYPTO_SESID2LID(cse->sid), crp);
/* crds are always ordered tcomp, thash, then txform */
/* with optional missing links */
/* XXX: If we're going to compress then hash or encrypt, we need
* to be able to pass on the new size of the data.
*/
if (cse->tcomp) {
crdc = crp->crp_desc;
}
if (cse->thash) {
crda = crdc ? crdc->crd_next : crp->crp_desc;
if (cse->txform && crda)
crde = crda->crd_next;
} else {
if (cse->txform) {
crde = crdc ? crdc->crd_next : crp->crp_desc;
} else if (!cse->tcomp) {
error = EINVAL;
goto bail;
}
}
DPRINTF("ocf[%u]: iov_len %zu, cop->len %u\n",
CRYPTO_SESID2LID(cse->sid),
cse->uio.uio_iov[0].iov_len,
cop->len);
if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
{
printf("copyin failed %s %d \n", (char *)cop->src, error);
goto bail;
}
if (crdc) {
switch (cop->op) {
case COP_COMP:
crdc->crd_flags |= CRD_F_COMP;
break;
case COP_DECOMP:
crdc->crd_flags &= ~CRD_F_COMP;
break;
default:
break;
}
/* more data to follow? */
if (cop->flags & COP_F_MORE) {
flags |= CRYPTO_F_MORE;
}
crdc->crd_len = cop->len;
crdc->crd_inject = 0;
crdc->crd_alg = cse->comp_alg;
crdc->crd_key = NULL;
crdc->crd_klen = 0;
DPRINTF("lid[%u]: crdc setup for comp_alg %d.\n",
CRYPTO_SESID2LID(cse->sid), crdc->crd_alg);
}
if (crda) {
crda->crd_skip = 0;
crda->crd_len = cop->len;
crda->crd_inject = 0; /* ??? */
crda->crd_alg = cse->mac;
crda->crd_key = cse->mackey;
crda->crd_klen = cse->mackeylen * 8;
DPRINTF("crda setup for mac %d.\n", crda->crd_alg);
}
if (crde) {
switch (cop->op) {
case COP_ENCRYPT:
crde->crd_flags |= CRD_F_ENCRYPT;
break;
case COP_DECRYPT:
crde->crd_flags &= ~CRD_F_ENCRYPT;
break;
default:
break;
}
crde->crd_len = cop->len;
crde->crd_inject = 0;
if (cse->cipher == CRYPTO_AES_GCM_16 && crda)
crda->crd_len = 0;
else if (cse->cipher == CRYPTO_AES_GMAC)
crde->crd_len = 0;
crde->crd_alg = cse->cipher;
crde->crd_key = cse->key;
crde->crd_klen = cse->keylen * 8;
DPRINTF("crde setup for cipher %d.\n", crde->crd_alg);
}
crp->crp_ilen = cop->len;
/*
* The request is flagged as CRYPTO_F_USER as long as it is running
* in the user IOCTL thread. However, whether the request completes
* immediately or belatedly is depends on the used encryption driver.
*/
crp->crp_flags = CRYPTO_F_IOV | (cop->flags & COP_F_BATCH) | CRYPTO_F_USER |
flags;
crp->crp_buf = (void *)&cse->uio;
crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
crp->crp_sid = cse->sid;
crp->crp_opaque = (void *)cse;
if (cop->iv) {
if (crde == NULL) {
error = EINVAL;
goto bail;
}
if (cse->txform->ivsize == 0) {
error = EINVAL;
goto bail;
}
if ((error = copyin(cop->iv, cse->tmp_iv,
cse->txform->ivsize)))
goto bail;
(void)memcpy(crde->crd_iv, cse->tmp_iv, cse->txform->ivsize);
crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
crde->crd_skip = 0;
} else if (crde) {
if (cse->txform->ivsize == 0) {
crde->crd_skip = 0;
} else {
if (!(crde->crd_flags & CRD_F_ENCRYPT))
crde->crd_flags |= CRD_F_IV_PRESENT;
crde->crd_skip = cse->txform->ivsize;
crde->crd_len -= cse->txform->ivsize;
}
}
if (cop->mac) {
if (crda == NULL) {
error = EINVAL;
goto bail;
}
crp->crp_mac=cse->tmp_mac;
}
cv_init(&crp->crp_cv, "crydev");
/*
* XXX there was a comment here which said that we went to
* XXX splcrypto() but needed to only if CRYPTO_F_CBIMM,
* XXX disabled on NetBSD since 1.6O due to a race condition.
* XXX But crypto_dispatch went to splcrypto() itself! (And
* XXX now takes the cryptodev_mtx mutex itself). We do, however,
* XXX need to hold the mutex across the call to cv_wait().
* XXX (should we arrange for crypto_dispatch to return to
* XXX us with it held? it seems quite ugly to do so.)
*/
#ifdef notyet
eagain:
#endif
error = crypto_dispatch(crp);
mutex_enter(&cryptodev_mtx);
/*
* Don't touch crp before returned by any error or received
* cv_signal(&crp->crp_cv). It is required to restructure locks.
*/
switch (error) {
#ifdef notyet /* don't loop forever -- but EAGAIN not possible here yet */
case EAGAIN:
mutex_exit(&cryptodev_mtx);
goto eagain;
break;
#endif
case 0:
break;
default:
DPRINTF("not waiting, error.\n");
mutex_exit(&cryptodev_mtx);
cv_destroy(&crp->crp_cv);
goto bail;
}
while (!(crp->crp_devflags & CRYPTODEV_F_RET)) {
DPRINTF("cse->sid[%d]: sleeping on cv %p for crp %p\n",
(uint32_t)cse->sid, &crp->crp_cv, crp);
cv_wait(&crp->crp_cv, &cryptodev_mtx); /* XXX cv_wait_sig? */
}
mutex_exit(&cryptodev_mtx);
cv_destroy(&crp->crp_cv);
if (crp->crp_etype != 0) {
DPRINTF("crp_etype %d\n", crp->crp_etype);
error = crp->crp_etype;
goto bail;
}
if (cse->error) {
DPRINTF("cse->error %d\n", cse->error);
error = cse->error;
goto bail;
}
dst_len = crp->crp_ilen;
/* let the user know how much data was returned */
if (crp->crp_olen) {
if (crp->crp_olen > (cop->dst_len ? cop->dst_len : cop->len)) {
error = ENOSPC;
goto bail;
}
dst_len = cop->dst_len = crp->crp_olen;
}
if (cop->dst) {
DPRINTF("copyout %d bytes to %p\n", dst_len, cop->dst);
}
if (cop->dst &&
(error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, dst_len)))
{
DPRINTF("copyout error %d\n", error);
goto bail;
}
if (cop->mac &&
(error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize))) {
DPRINTF("mac copyout error %d\n", error);
goto bail;
}
bail:
if (crp) {
crypto_freereq(crp);
}
if (cse->uio.uio_iov[0].iov_base) {
kmem_free(cse->uio.uio_iov[0].iov_base,iov_len);
}
return error;
}
static int
cryptodev_cb(void *op)
{
struct cryptop *crp = (struct cryptop *) op;
struct csession *cse = (struct csession *)crp->crp_opaque;
int error = 0;
mutex_enter(&cryptodev_mtx);
cse->error = crp->crp_etype;
if (crp->crp_etype == EAGAIN) {
/* always drop mutex to call dispatch routine */
mutex_exit(&cryptodev_mtx);
error = crypto_dispatch(crp);
mutex_enter(&cryptodev_mtx);
}
if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) {
crp->crp_devflags |= CRYPTODEV_F_RET;
cv_signal(&crp->crp_cv);
}
mutex_exit(&cryptodev_mtx);
return 0;
}
static int
cryptodev_mcb(void *op)
{
struct cryptop *crp = (struct cryptop *) op;
struct csession *cse = (struct csession *)crp->crp_opaque;
int error=0;
mutex_enter(&cryptodev_mtx);
cse->error = crp->crp_etype;
if (crp->crp_etype == EAGAIN) {
mutex_exit(&cryptodev_mtx);
error = crypto_dispatch(crp);
mutex_enter(&cryptodev_mtx);
}
if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) {
cv_signal(&crp->crp_cv);
}
TAILQ_INSERT_TAIL(&crp->fcrp->crp_ret_mq, crp, crp_next);
selnotify(&crp->fcrp->sinfo, 0, 0);
mutex_exit(&cryptodev_mtx);
return 0;
}
static int
cryptodevkey_cb(void *op)
{
struct cryptkop *krp = op;
mutex_enter(&cryptodev_mtx);
krp->krp_devflags |= CRYPTODEV_F_RET;
cv_signal(&krp->krp_cv);
mutex_exit(&cryptodev_mtx);
return 0;
}
static int
cryptodevkey_mcb(void *op)
{
struct cryptkop *krp = op;
mutex_enter(&cryptodev_mtx);
cv_signal(&krp->krp_cv);
TAILQ_INSERT_TAIL(&krp->fcrp->crp_ret_mkq, krp, krp_next);
selnotify(&krp->fcrp->sinfo, 0, 0);
mutex_exit(&cryptodev_mtx);
return 0;
}
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)
return EFBIG;
in = kop->crk_iparams;
out = kop->crk_oparams;
switch (kop->crk_op) {
case CRK_MOD_EXP:
if (in == 3 && out == 1)
break;
return EINVAL;
case CRK_MOD_EXP_CRT:
if (in == 6 && out == 1)
break;
return EINVAL;
case CRK_DSA_SIGN:
if (in == 5 && out == 2)
break;
return EINVAL;
case CRK_DSA_VERIFY:
if (in == 7 && out == 0)
break;
return EINVAL;
case CRK_DH_COMPUTE_KEY:
if (in == 3 && out == 1)
break;
return EINVAL;
case CRK_MOD_ADD:
if (in == 3 && out == 1)
break;
return EINVAL;
case CRK_MOD_ADDINV:
if (in == 2 && out == 1)
break;
return EINVAL;
case CRK_MOD_SUB:
if (in == 3 && out == 1)
break;
return EINVAL;
case CRK_MOD_MULT:
if (in == 3 && out == 1)
break;
return EINVAL;
case CRK_MOD_MULTINV:
if (in == 2 && out == 1)
break;
return EINVAL;
case CRK_MOD:
if (in == 2 && out == 1)
break;
return EINVAL;
default:
return EINVAL;
}
krp = crypto_kgetreq(1, PR_WAITOK);
if (krp == NULL) {
/* limited by opencrypto.crypto_ret_kq.maxlen */
return ENOMEM;
}
(void)memset(krp, 0, sizeof *krp);
cv_init(&krp->krp_cv, "crykdev");
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_status = 0;
krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
for (i = 0; i < CRK_MAXPARAM; i++)
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 = kmem_alloc(size, KM_SLEEP);
if (i >= krp->krp_iparams)
continue;
error = copyin(kop->crk_param[i].crp_p,
krp->krp_param[i].crp_p, size);
if (error)
goto fail;
}
error = crypto_kdispatch(krp);
if (error != 0) {
goto fail;
}
mutex_enter(&cryptodev_mtx);
while (!(krp->krp_devflags & CRYPTODEV_F_RET)) {
cv_wait(&krp->krp_cv, &cryptodev_mtx); /* XXX cv_wait_sig? */
}
mutex_exit(&cryptodev_mtx);
if (krp->krp_status != 0) {
DPRINTF("krp->krp_status 0x%08x\n", krp->krp_status);
error = krp->krp_status;
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) {
DPRINTF("copyout oparam %d failed, "
"error=%d\n", i-krp->krp_iparams, error);
goto fail;
}
}
fail:
kop->crk_status = krp->krp_status;
for (i = 0; i < CRK_MAXPARAM; i++) {
struct crparam *kp = &(krp->krp_param[i]);
if (krp->krp_param[i].crp_p) {
size = (kp->crp_nbits + 7) / 8;
KASSERT(size > 0);
(void)memset(kp->crp_p, 0, size);
kmem_free(kp->crp_p, size);
}
}
cv_destroy(&krp->krp_cv);
crypto_kfreereq(krp);
DPRINTF("error=0x%08x\n", error);
return error;
}
/* ARGSUSED */
static int
cryptof_close(struct file *fp)
{
struct fcrypt *fcr = fp->f_fcrypt;
struct csession *cse;
mutex_enter(&cryptodev_mtx);
while ((cse = TAILQ_FIRST(&fcr->csessions))) {
TAILQ_REMOVE(&fcr->csessions, cse, next);
mutex_exit(&cryptodev_mtx);
(void)csefree(cse);
mutex_enter(&cryptodev_mtx);
}
seldestroy(&fcr->sinfo);
fp->f_fcrypt = NULL;
crypto_refcount--;
mutex_exit(&cryptodev_mtx);
pool_put(&fcrpl, fcr);
return 0;
}
/* needed for compatibility module */
struct csession *cryptodev_csefind(struct fcrypt *fcr, u_int ses)
{
return csefind(fcr, ses);
}
/* csefind: call with cryptodev_mtx held. */
static struct csession *
csefind(struct fcrypt *fcr, u_int ses)
{
struct csession *cse, *cnext, *ret = NULL;
KASSERT(mutex_owned(&cryptodev_mtx));
TAILQ_FOREACH_SAFE(cse, &fcr->csessions, next, cnext)
if (cse->ses == ses)
ret = cse;
return ret;
}
/* csedelete: call with cryptodev_mtx held. */
static int
csedelete(struct fcrypt *fcr, struct csession *cse_del)
{
struct csession *cse, *cnext;
int ret = 0;
KASSERT(mutex_owned(&cryptodev_mtx));
TAILQ_FOREACH_SAFE(cse, &fcr->csessions, next, cnext) {
if (cse == cse_del) {
TAILQ_REMOVE(&fcr->csessions, cse, next);
ret = 1;
}
}
return ret;
}
static struct csession *
cseadd(struct fcrypt *fcr, struct csession *cse)
{
mutex_enter(&cryptodev_mtx);
/* don't let session ID wrap! */
if (fcr->sesn + 1 == 0) return NULL;
TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
cse->ses = fcr->sesn++;
mutex_exit(&cryptodev_mtx);
return cse;
}
static struct csession *
csecreate(struct fcrypt *fcr, u_int64_t sid, void *key, u_int64_t keylen,
void *mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
u_int32_t comp_alg, const struct enc_xform *txform,
const struct auth_hash *thash, const struct comp_algo *tcomp)
{
struct csession *cse;
cse = pool_get(&csepl, PR_NOWAIT);
if (cse == NULL)
return NULL;
cse->key = key;
cse->keylen = keylen/8;
cse->mackey = mackey;
cse->mackeylen = mackeylen/8;
cse->sid = sid;
cse->cipher = cipher;
cse->mac = mac;
cse->comp_alg = comp_alg;
cse->txform = txform;
cse->thash = thash;
cse->tcomp = tcomp;
cse->error = 0;
if (cseadd(fcr, cse))
return cse;
else {
pool_put(&csepl, cse);
return NULL;
}
}
/* csefree: call with cryptodev_mtx held. */
static int
csefree(struct csession *cse)
{
int error;
error = crypto_freesession(cse->sid);
if (cse->key)
free(cse->key, M_XDATA);
if (cse->mackey)
free(cse->mackey, M_XDATA);
pool_put(&csepl, cse);
return error;
}
static int
cryptoopen(dev_t dev, int flag, int mode,
struct lwp *l)
{
file_t *fp;
struct fcrypt *fcr;
int fd, error;
if (crypto_usercrypto == 0)
return ENXIO;
if ((error = fd_allocfile(&fp, &fd)) != 0)
return error;
fcr = pool_get(&fcrpl, PR_WAITOK);
getnanotime(&fcr->btime);
fcr->atime = fcr->mtime = fcr->btime;
mutex_enter(&cryptodev_mtx);
TAILQ_INIT(&fcr->csessions);
TAILQ_INIT(&fcr->crp_ret_mq);
TAILQ_INIT(&fcr->crp_ret_mkq);
selinit(&fcr->sinfo);
/*
* Don't ever return session 0, to allow detection of
* failed creation attempts with multi-create ioctl.
*/
fcr->sesn = 1;
fcr->requestid = 1;
crypto_refcount++;
mutex_exit(&cryptodev_mtx);
return fd_clone(fp, fd, flag, &cryptofops, fcr);
}
static int
cryptoread(dev_t dev, struct uio *uio, int ioflag)
{
return EIO;
}
static int
cryptowrite(dev_t dev, struct uio *uio, int ioflag)
{
return EIO;
}
int
cryptoselect(dev_t dev, int rw, struct lwp *l)
{
return 0;
}
/*static*/
struct cdevsw crypto_cdevsw = {
.d_open = cryptoopen,
.d_close = noclose,
.d_read = cryptoread,
.d_write = cryptowrite,
.d_ioctl = noioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = cryptoselect /*nopoll*/,
.d_mmap = nommap,
.d_kqfilter = nokqfilter,
.d_discard = nodiscard,
.d_flag = D_OTHER
};
int
cryptodev_mop(struct fcrypt *fcr,
struct crypt_n_op * cnop,
int count, struct lwp *l)
{
struct cryptop *crp = NULL;
struct cryptodesc *crde = NULL, *crda = NULL, *crdc = NULL;
int req, error=0;
struct csession *cse;
int flags=0;
int iov_len;
for (req = 0; req < count; req++) {
mutex_enter(&cryptodev_mtx);
cse = csefind(fcr, cnop[req].ses);
if (cse == NULL) {
DPRINTF("csefind failed\n");
cnop[req].status = EINVAL;
mutex_exit(&cryptodev_mtx);
continue;
}
mutex_exit(&cryptodev_mtx);
if (cnop[req].len > 256*1024-4) {
DPRINTF("length failed\n");
cnop[req].status = EINVAL;
continue;
}
if (cse->txform) {
if (cnop[req].len < cse->txform->blocksize -
(cnop[req].iv ? 0 : cse->txform->ivsize) ||
(cnop[req].len -
(cnop[req].iv ? 0 : cse->txform->ivsize))
% cse->txform->blocksize) {
cnop[req].status = EINVAL;
continue;
}
}
/* sanitize */
if (cnop[req].len <= 0) {
cnop[req].status = ENOMEM;
goto bail;
}
crp = crypto_getreq((cse->txform != NULL) +
(cse->thash != NULL) +
(cse->tcomp != NULL));
if (crp == NULL) {
cnop[req].status = ENOMEM;
goto bail;
}
iov_len = cnop[req].len;
/* got a compression/decompression max size? */
if ((cse->tcomp) && cnop[req].dst_len) {
if (iov_len < cnop[req].dst_len) {
/* Need larger iov to deal with decompress */
iov_len = cnop[req].dst_len;
}
DPRINTF("iov_len -> %d for decompress\n", iov_len);
}
(void)memset(&crp->uio, 0, sizeof(crp->uio));
crp->uio.uio_iovcnt = 1;
crp->uio.uio_resid = 0;
crp->uio.uio_rw = UIO_WRITE;
crp->uio.uio_iov = crp->iovec;
UIO_SETUP_SYSSPACE(&crp->uio);
memset(&crp->iovec, 0, sizeof(crp->iovec));
crp->uio.uio_iov[0].iov_len = iov_len;
DPRINTF("kmem_alloc(%d) for iov \n", iov_len);
crp->uio.uio_iov[0].iov_base = kmem_alloc(iov_len, KM_SLEEP);
crp->uio.uio_resid = crp->uio.uio_iov[0].iov_len;
if (cse->tcomp) {
crdc = crp->crp_desc;
}
if (cse->thash) {
crda = crdc ? crdc->crd_next : crp->crp_desc;
if (cse->txform && crda)
crde = crda->crd_next;
} else {
if (cse->txform) {
crde = crdc ? crdc->crd_next : crp->crp_desc;
} else if (!cse->tcomp) {
error = EINVAL;
goto bail;
}
}
if ((copyin(cnop[req].src,
crp->uio.uio_iov[0].iov_base, cnop[req].len))) {
cnop[req].status = EINVAL;
goto bail;
}
if (crdc) {
switch (cnop[req].op) {
case COP_COMP:
crdc->crd_flags |= CRD_F_COMP;
break;
case COP_DECOMP:
crdc->crd_flags &= ~CRD_F_COMP;
break;
default:
break;
}
/* more data to follow? */
if (cnop[req].flags & COP_F_MORE) {
flags |= CRYPTO_F_MORE;
}
crdc->crd_len = cnop[req].len;
crdc->crd_inject = 0;
crdc->crd_alg = cse->comp_alg;
crdc->crd_key = NULL;
crdc->crd_klen = 0;
DPRINTF("cse->sid[%d]: crdc setup for comp_alg %d"
" len %d.\n",
(uint32_t)cse->sid, crdc->crd_alg,
crdc->crd_len);
}
if (crda) {
crda->crd_skip = 0;
crda->crd_len = cnop[req].len;
crda->crd_inject = 0; /* ??? */
crda->crd_alg = cse->mac;
crda->crd_key = cse->mackey;
crda->crd_klen = cse->mackeylen * 8;
}
if (crde) {
if (cnop[req].op == COP_ENCRYPT)
crde->crd_flags |= CRD_F_ENCRYPT;
else
crde->crd_flags &= ~CRD_F_ENCRYPT;
crde->crd_len = cnop[req].len;
crde->crd_inject = 0;
crde->crd_alg = cse->cipher;
#ifdef notyet /* XXX must notify h/w driver new key, drain */
if(cnop[req].key && cnop[req].keylen) {
crde->crd_key = malloc(cnop[req].keylen,
M_XDATA, M_WAITOK);
if((error = copyin(cnop[req].key,
crde->crd_key, cnop[req].keylen))) {
cnop[req].status = EINVAL;
goto bail;
}
crde->crd_klen = cnop[req].keylen * 8;
} else { ... }
#endif
crde->crd_key = cse->key;
crde->crd_klen = cse->keylen * 8;
}
crp->crp_ilen = cnop[req].len;
crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM |
(cnop[req].flags & COP_F_BATCH) | flags;
crp->crp_buf = (void *)&crp->uio;
crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_mcb;
crp->crp_sid = cse->sid;
crp->crp_opaque = (void *)cse;
crp->fcrp = fcr;
crp->dst = cnop[req].dst;
crp->len = cnop[req].len; /* input len, iov may be larger */
crp->mac = cnop[req].mac;
DPRINTF("iov_base %p dst %p len %d mac %p\n",
crp->uio.uio_iov[0].iov_base, crp->dst, crp->len,
crp->mac);
if (cnop[req].iv) {
if (crde == NULL) {
cnop[req].status = EINVAL;
goto bail;
}
if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
cnop[req].status = EINVAL;
goto bail;
}
if ((error = copyin(cnop[req].iv, crp->tmp_iv,
cse->txform->ivsize))) {
cnop[req].status = EINVAL;
goto bail;
}
(void)memcpy(crde->crd_iv, crp->tmp_iv,
cse->txform->ivsize);
crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
crde->crd_skip = 0;
} else if (crde) {
if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
crde->crd_skip = 0;
} else {
if (!(crde->crd_flags & CRD_F_ENCRYPT))
crde->crd_flags |= CRD_F_IV_PRESENT;
crde->crd_skip = cse->txform->ivsize;
crde->crd_len -= cse->txform->ivsize;
}
}
if (cnop[req].mac) {
if (crda == NULL) {
cnop[req].status = EINVAL;
goto bail;
}
crp->crp_mac=cse->tmp_mac;
}
cnop[req].reqid = atomic_inc_32_nv(&(fcr->requestid));
crp->crp_reqid = cnop[req].reqid;
crp->crp_usropaque = cnop[req].opaque;
cv_init(&crp->crp_cv, "crydev");
#ifdef notyet
eagain:
#endif
cnop[req].status = crypto_dispatch(crp);
mutex_enter(&cryptodev_mtx); /* XXX why mutex? */
switch (cnop[req].status) {
#ifdef notyet /* don't loop forever -- but EAGAIN not possible here yet */
case EAGAIN:
mutex_exit(&cryptodev_mtx);
goto eagain;
break;
#endif
case 0:
break;
default:
DPRINTF("not waiting, error.\n");
mutex_exit(&cryptodev_mtx);
cv_destroy(&crp->crp_cv);
goto bail;
}
mutex_exit(&cryptodev_mtx);
cv_destroy(&crp->crp_cv);
bail:
if (cnop[req].status) {
if (crp) {
if (crp->uio.uio_iov[0].iov_base) {
kmem_free(crp->uio.uio_iov[0].iov_base,
crp->uio.uio_iov[0].iov_len);
}
crypto_freereq(crp);
}
error = 0;
}
}
return error;
}
static int
cryptodev_mkey(struct fcrypt *fcr, struct crypt_n_kop *kop, int count)
{
struct cryptkop *krp = NULL;
int error = EINVAL;
int in, out, size, i, req;
for (req = 0; req < count; req++) {
if (kop[req].crk_iparams + kop[req].crk_oparams > CRK_MAXPARAM)
return EFBIG;
in = kop[req].crk_iparams;
out = kop[req].crk_oparams;
switch (kop[req].crk_op) {
case CRK_MOD_EXP:
if (in == 3 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_MOD_EXP_CRT:
if (in == 6 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_DSA_SIGN:
if (in == 5 && out == 2)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_DSA_VERIFY:
if (in == 7 && out == 0)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_DH_COMPUTE_KEY:
if (in == 3 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_MOD_ADD:
if (in == 3 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_MOD_ADDINV:
if (in == 2 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_MOD_SUB:
if (in == 3 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_MOD_MULT:
if (in == 3 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_MOD_MULTINV:
if (in == 2 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
case CRK_MOD:
if (in == 2 && out == 1)
break;
kop[req].crk_status = EINVAL;
continue;
default:
kop[req].crk_status = EINVAL;
continue;
}
krp = crypto_kgetreq(1, PR_WAITOK);
if (krp == NULL) {
/* limited by opencrypto.crypto_ret_kq.maxlen */
continue;
}
(void)memset(krp, 0, sizeof *krp);
cv_init(&krp->krp_cv, "crykdev");
krp->krp_op = kop[req].crk_op;
krp->krp_status = kop[req].crk_status;
krp->krp_iparams = kop[req].crk_iparams;
krp->krp_oparams = kop[req].crk_oparams;
krp->krp_status = 0;
krp->krp_callback =
(int (*) (struct cryptkop *)) cryptodevkey_mcb;
(void)memcpy(krp->crk_param, kop[req].crk_param,
sizeof(kop[req].crk_param));
krp->krp_flags = CRYPTO_F_CBIMM;
for (i = 0; i < CRK_MAXPARAM; i++)
krp->krp_param[i].crp_nbits =
kop[req].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 =
kmem_alloc(size, KM_SLEEP);
if (i >= krp->krp_iparams)
continue;
kop[req].crk_status =
copyin(kop[req].crk_param[i].crp_p,
krp->krp_param[i].crp_p, size);
if (kop[req].crk_status)
goto fail;
}
krp->fcrp = fcr;
kop[req].crk_reqid = atomic_inc_32_nv(&(fcr->requestid));
krp->krp_reqid = kop[req].crk_reqid;
krp->krp_usropaque = kop[req].crk_opaque;
kop[req].crk_status = crypto_kdispatch(krp);
if (kop[req].crk_status != 0) {
goto fail;
}
fail:
if(kop[req].crk_status) {
if (krp) {
kop[req].crk_status = krp->krp_status;
for (i = 0; i < CRK_MAXPARAM; i++) {
struct crparam *kp =
&(krp->krp_param[i]);
if (kp->crp_p) {
size = (kp->crp_nbits + 7) / 8;
KASSERT(size > 0);
memset(kp->crp_p, 0, size);
kmem_free(kp->crp_p, size);
}
}
cv_destroy(&krp->krp_cv);
crypto_kfreereq(krp);
}
}
error = 0;
}
DPRINTF("error=0x%08x\n", error);
return error;
}
int
cryptodev_session(struct fcrypt *fcr, struct session_op *sop)
{
struct cryptoini cria, crie;
struct cryptoini cric; /* compressor */
struct cryptoini *crihead = NULL;
const struct enc_xform *txform = NULL;
const struct auth_hash *thash = NULL;
const struct comp_algo *tcomp = NULL;
struct csession *cse;
u_int64_t sid;
int error = 0;
DPRINTF("cipher=%d, mac=%d\n", sop->cipher, sop->mac);
/* XXX there must be a way to not embed the list of xforms here */
switch (sop->cipher) {
case 0:
break;
case CRYPTO_DES_CBC:
txform = &enc_xform_des;
break;
case CRYPTO_3DES_CBC:
txform = &enc_xform_3des;
break;
case CRYPTO_BLF_CBC:
txform = &enc_xform_blf;
break;
case CRYPTO_CAST_CBC:
txform = &enc_xform_cast5;
break;
case CRYPTO_SKIPJACK_CBC:
txform = &enc_xform_skipjack;
break;
case CRYPTO_AES_CBC:
txform = &enc_xform_rijndael128;
break;
case CRYPTO_CAMELLIA_CBC:
txform = &enc_xform_camellia;
break;
case CRYPTO_AES_CTR:
txform = &enc_xform_aes_ctr;
break;
case CRYPTO_AES_GCM_16:
txform = &enc_xform_aes_gcm;
break;
case CRYPTO_AES_GMAC:
txform = &enc_xform_aes_gmac;
break;
case CRYPTO_NULL_CBC:
txform = &enc_xform_null;
break;
case CRYPTO_ARC4:
txform = &enc_xform_arc4;
break;
default:
DPRINTF("Invalid cipher %d\n", sop->cipher);
return EINVAL;
}
switch (sop->comp_alg) {
case 0:
break;
case CRYPTO_DEFLATE_COMP:
tcomp = &comp_algo_deflate;
break;
case CRYPTO_GZIP_COMP:
tcomp = &comp_algo_gzip;
DPRINTF("tcomp for GZIP\n");
break;
default:
DPRINTF("Invalid compression alg %d\n", sop->comp_alg);
return EINVAL;
}
switch (sop->mac) {
case 0:
break;
case CRYPTO_MD5_HMAC:
thash = &auth_hash_hmac_md5;
break;
case CRYPTO_SHA1_HMAC:
thash = &auth_hash_hmac_sha1;
break;
case CRYPTO_MD5_HMAC_96:
thash = &auth_hash_hmac_md5_96;
break;
case CRYPTO_SHA1_HMAC_96:
thash = &auth_hash_hmac_sha1_96;
break;
case CRYPTO_SHA2_HMAC:
/* XXX switching on key length seems questionable */
if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize) {
thash = &auth_hash_hmac_sha2_256;
} else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize) {
thash = &auth_hash_hmac_sha2_384;
} else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize) {
thash = &auth_hash_hmac_sha2_512;
} else {
DPRINTF("Invalid mackeylen %d\n", sop->mackeylen);
return EINVAL;
}
break;
case CRYPTO_RIPEMD160_HMAC:
thash = &auth_hash_hmac_ripemd_160;
break;
case CRYPTO_RIPEMD160_HMAC_96:
thash = &auth_hash_hmac_ripemd_160_96;
break;
case CRYPTO_MD5:
thash = &auth_hash_md5;
break;
case CRYPTO_SHA1:
thash = &auth_hash_sha1;
break;
case CRYPTO_AES_XCBC_MAC_96:
thash = &auth_hash_aes_xcbc_mac_96;
break;
case CRYPTO_AES_128_GMAC:
thash = &auth_hash_gmac_aes_128;
break;
case CRYPTO_AES_192_GMAC:
thash = &auth_hash_gmac_aes_192;
break;
case CRYPTO_AES_256_GMAC:
thash = &auth_hash_gmac_aes_256;
break;
case CRYPTO_NULL_HMAC:
thash = &auth_hash_null;
break;
default:
DPRINTF("Invalid mac %d\n", sop->mac);
return EINVAL;
}
memset(&crie, 0, sizeof(crie));
memset(&cria, 0, sizeof(cria));
memset(&cric, 0, sizeof(cric));
if (tcomp) {
cric.cri_alg = tcomp->type;
cric.cri_klen = 0;
DPRINTF("tcomp->type = %d\n", tcomp->type);
crihead = &cric;
if (txform) {
cric.cri_next = &crie;
} else if (thash) {
cric.cri_next = &cria;
}
}
if (txform) {
crie.cri_alg = txform->type;
crie.cri_klen = sop->keylen * 8;
if (sop->keylen > txform->maxkey ||
sop->keylen < txform->minkey) {
DPRINTF("keylen %d not in [%d,%d]\n",
sop->keylen, txform->minkey, txform->maxkey);
error = EINVAL;
goto bail;
}
crie.cri_key = malloc(crie.cri_klen / 8, M_XDATA, M_WAITOK);
if ((error = copyin(sop->key, crie.cri_key, crie.cri_klen / 8)))
goto bail;
if (!crihead) {
crihead = &crie;
}
if (thash)
crie.cri_next = &cria;
}
if (thash) {
cria.cri_alg = thash->type;
cria.cri_klen = sop->mackeylen * 8;
if (sop->mackeylen != thash->keysize) {
DPRINTF("mackeylen %d != keysize %d\n",
sop->mackeylen, thash->keysize);
error = EINVAL;
goto bail;
}
if (cria.cri_klen) {
cria.cri_key = malloc(cria.cri_klen / 8, M_XDATA,
M_WAITOK);
if ((error = copyin(sop->mackey, cria.cri_key,
cria.cri_klen / 8))) {
goto bail;
}
}
if (!crihead) {
crihead = &cria;
}
}
error = crypto_newsession(&sid, crihead, crypto_devallowsoft);
if (!error) {
DPRINTF("got session %d\n", (uint32_t)sid);
cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
cria.cri_key, cria.cri_klen, (txform ? sop->cipher : 0), sop->mac,
(tcomp ? sop->comp_alg : 0), txform, thash, tcomp);
if (cse != NULL) {
sop->ses = cse->ses;
} else {
DPRINTF("csecreate failed\n");
crypto_freesession(sid);
error = EINVAL;
}
} else {
DPRINTF("SIOCSESSION violates kernel parameters %d\n", error);
}
bail:
if (error) {
if (crie.cri_key) {
memset(crie.cri_key, 0, crie.cri_klen / 8);
free(crie.cri_key, M_XDATA);
}
if (cria.cri_key) {
memset(cria.cri_key, 0, cria.cri_klen / 8);
free(cria.cri_key, M_XDATA);
}
}
return error;
}
int
cryptodev_msession(struct fcrypt *fcr, struct session_n_op *sn_ops,
int count)
{
int i;
for (i = 0; i < count; i++, sn_ops++) {
struct session_op s_op;
s_op.cipher = sn_ops->cipher;
s_op.mac = sn_ops->mac;
s_op.comp_alg = sn_ops->comp_alg;
s_op.keylen = sn_ops->keylen;
s_op.key = sn_ops->key;
s_op.mackeylen = sn_ops->mackeylen;
s_op.mackey = sn_ops->mackey;
sn_ops->status = cryptodev_session(fcr, &s_op);
sn_ops->ses = s_op.ses;
}
return 0;
}
static int
cryptodev_msessionfin(struct fcrypt *fcr, int count, u_int32_t *sesid)
{
struct csession *cse;
int req, error = 0;
mutex_enter(&cryptodev_mtx);
for(req = 0; req < count; req++) {
cse = csefind(fcr, sesid[req]);
if (cse == NULL)
continue;
csedelete(fcr, cse);
mutex_exit(&cryptodev_mtx);
error = csefree(cse);
mutex_enter(&cryptodev_mtx);
}
mutex_exit(&cryptodev_mtx);
return error;
}
/*
* collect as many completed requests as are availble, or count completed
* requests whichever is less.
* return the number of requests.
*/
static int
cryptodev_getmstatus(struct fcrypt *fcr, struct crypt_result *crypt_res,
int count)
{
struct cryptop *crp = NULL;
struct cryptkop *krp = NULL;
struct csession *cse;
int i, size, req = 0;
int completed=0;
/* On queue so nobody else can grab them
* and copyout can be delayed-- no locking */
TAILQ_HEAD(, cryptop) crp_delfree_q =
TAILQ_HEAD_INITIALIZER(crp_delfree_q);
TAILQ_HEAD(, cryptkop) krp_delfree_q =
TAILQ_HEAD_INITIALIZER(krp_delfree_q);
/* at this point we do not know which response user is requesting for
* (symmetric or asymmetric) so we copyout one from each i.e if the
* count is 2 then 1 from symmetric and 1 from asymmetric queue and
* if 3 then 2 symmetric and 1 asymmetric and so on */
/* pull off a list of requests while protected from changes */
mutex_enter(&cryptodev_mtx);
while (req < count) {
crp = TAILQ_FIRST(&fcr->crp_ret_mq);
if (crp) {
TAILQ_REMOVE(&fcr->crp_ret_mq, crp, crp_next);
TAILQ_INSERT_TAIL(&crp_delfree_q, crp, crp_next);
cse = (struct csession *)crp->crp_opaque;
/* see if the session is still valid */
cse = csefind(fcr, cse->ses);
if (cse != NULL) {
crypt_res[req].status = 0;
} else {
DPRINTF("csefind failed\n");
crypt_res[req].status = EINVAL;
}
req++;
}
if(req < count) {
crypt_res[req].status = 0;
krp = TAILQ_FIRST(&fcr->crp_ret_mkq);
if (krp) {
TAILQ_REMOVE(&fcr->crp_ret_mkq, krp, krp_next);
TAILQ_INSERT_TAIL(&krp_delfree_q, krp, krp_next);
req++;
}
}
}
mutex_exit(&cryptodev_mtx);
/* now do all the work outside the mutex */
for(req=0; req < count ;) {
crp = TAILQ_FIRST(&crp_delfree_q);
if (crp) {
if (crypt_res[req].status != 0) {
/* csefind failed during collection */
goto bail;
}
cse = (struct csession *)crp->crp_opaque;
crypt_res[req].reqid = crp->crp_reqid;
crypt_res[req].opaque = crp->crp_usropaque;
completed++;
if (crp->crp_etype != 0) {
crypt_res[req].status = crp->crp_etype;
goto bail;
}
if (cse->error) {
crypt_res[req].status = cse->error;
goto bail;
}
if (crp->dst && (crypt_res[req].status =
copyout(crp->uio.uio_iov[0].iov_base, crp->dst,
crp->len)))
goto bail;
if (crp->mac && (crypt_res[req].status =
copyout(crp->crp_mac, crp->mac,
cse->thash->authsize)))
goto bail;
bail:
TAILQ_REMOVE(&crp_delfree_q, crp, crp_next);
kmem_free(crp->uio.uio_iov[0].iov_base,
crp->uio.uio_iov[0].iov_len);
crypto_freereq(crp);
req++;
}
if (req < count) {
krp = TAILQ_FIRST(&krp_delfree_q);
if (krp) {
crypt_res[req].reqid = krp->krp_reqid;
crypt_res[req].opaque = krp->krp_usropaque;
completed++;
if (krp->krp_status != 0) {
DPRINTF("krp->krp_status 0x%08x\n",
krp->krp_status);
crypt_res[req].status = krp->krp_status;
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;
crypt_res[req].status = copyout
(krp->krp_param[i].crp_p,
krp->crk_param[i].crp_p, size);
if (crypt_res[req].status) {
DPRINTF("copyout oparam %d failed, "
"error=%d\n",
i - krp->krp_iparams,
crypt_res[req].status);
goto fail;
}
}
fail:
TAILQ_REMOVE(&krp_delfree_q, krp, krp_next);
/* not sure what to do for this */
/* kop[req].crk_status = krp->krp_status; */
for (i = 0; i < CRK_MAXPARAM; i++) {
struct crparam *kp = &(krp->krp_param[i]);
if (kp->crp_p) {
size = (kp->crp_nbits + 7) / 8;
KASSERT(size > 0);
(void)memset(kp->crp_p, 0, size);
kmem_free(kp->crp_p, size);
}
}
cv_destroy(&krp->krp_cv);
crypto_kfreereq(krp);
req++;
}
}
}
return completed;
}
static int
cryptodev_getstatus (struct fcrypt *fcr, struct crypt_result *crypt_res)
{
struct cryptop *crp = NULL, *cnext;
struct cryptkop *krp = NULL, *knext;
struct csession *cse;
int i, size, req = 0;
mutex_enter(&cryptodev_mtx);
/* Here we dont know for which request the user is requesting the
* response so checking in both the queues */
TAILQ_FOREACH_SAFE(crp, &fcr->crp_ret_mq, crp_next, cnext) {
if(crp && (crp->crp_reqid == crypt_res->reqid)) {
cse = (struct csession *)crp->crp_opaque;
crypt_res->opaque = crp->crp_usropaque;
cse = csefind(fcr, cse->ses);
if (cse == NULL) {
DPRINTF("csefind failed\n");
crypt_res->status = EINVAL;
goto bail;
}
if (crp->crp_etype != 0) {
crypt_res->status = crp->crp_etype;
goto bail;
}
if (cse->error) {
crypt_res->status = cse->error;
goto bail;
}
if (crp->dst && (crypt_res->status =
copyout(crp->uio.uio_iov[0].iov_base,
crp->dst, crp->len)))
goto bail;
if (crp->mac && (crypt_res->status =
copyout(crp->crp_mac, crp->mac,
cse->thash->authsize)))
goto bail;
bail:
TAILQ_REMOVE(&fcr->crp_ret_mq, crp, crp_next);
mutex_exit(&cryptodev_mtx);
crypto_freereq(crp);
return 0;
}
}
TAILQ_FOREACH_SAFE(krp, &fcr->crp_ret_mkq, krp_next, knext) {
if(krp && (krp->krp_reqid == crypt_res->reqid)) {
crypt_res[req].opaque = krp->krp_usropaque;
if (krp->krp_status != 0) {
DPRINTF("krp->krp_status 0x%08x\n",
krp->krp_status);
crypt_res[req].status = krp->krp_status;
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;
crypt_res[req].status = copyout(
krp->krp_param[i].crp_p,
krp->crk_param[i].crp_p, size);
if (crypt_res[req].status) {
DPRINTF("copyout oparam "
"%d failed, error=%d\n",
i - krp->krp_iparams,
crypt_res[req].status);
goto fail;
}
}
fail:
TAILQ_REMOVE(&fcr->crp_ret_mkq, krp, krp_next);
mutex_exit(&cryptodev_mtx);
/* not sure what to do for this */
/* kop[req].crk_status = krp->krp_status; */
for (i = 0; i < CRK_MAXPARAM; i++) {
struct crparam *kp = &(krp->krp_param[i]);
if (kp->crp_p) {
size = (kp->crp_nbits + 7) / 8;
KASSERT(size > 0);
memset(kp->crp_p, 0, size);
kmem_free(kp->crp_p, size);
}
}
cv_destroy(&krp->krp_cv);
crypto_kfreereq(krp);
return 0;
}
}
mutex_exit(&cryptodev_mtx);
return EINPROGRESS;
}
static int
cryptof_stat(struct file *fp, struct stat *st)
{
struct fcrypt *fcr = fp->f_fcrypt;
(void)memset(st, 0, sizeof(*st));
mutex_enter(&cryptodev_mtx);
st->st_dev = makedev(cdevsw_lookup_major(&crypto_cdevsw), fcr->sesn);
st->st_atimespec = fcr->atime;
st->st_mtimespec = fcr->mtime;
st->st_ctimespec = st->st_birthtimespec = fcr->btime;
st->st_uid = kauth_cred_geteuid(fp->f_cred);
st->st_gid = kauth_cred_getegid(fp->f_cred);
mutex_exit(&cryptodev_mtx);
return 0;
}
static int
cryptof_poll(struct file *fp, int events)
{
struct fcrypt *fcr = fp->f_fcrypt;
int revents = 0;
if (!(events & (POLLIN | POLLRDNORM))) {
/* only support read and POLLIN */
return 0;
}
mutex_enter(&cryptodev_mtx);
if (TAILQ_EMPTY(&fcr->crp_ret_mq) && TAILQ_EMPTY(&fcr->crp_ret_mkq)) {
/* no completed requests pending, save the poll for later */
selrecord(curlwp, &fcr->sinfo);
} else {
/* let the app(s) know that there are completed requests */
revents = events & (POLLIN | POLLRDNORM);
}
mutex_exit(&cryptodev_mtx);
return revents;
}
/*
* Pseudo-device initialization routine for /dev/crypto
*/
void
cryptoattach(int num)
{
int error;
crypto_init();
mutex_init(&cryptodev_mtx, MUTEX_DEFAULT, IPL_NONE);
pool_init(&fcrpl, sizeof(struct fcrypt), 0, 0, 0, "fcrpl",
NULL, IPL_NET); /* XXX IPL_NET ("splcrypto") */
pool_init(&csepl, sizeof(struct csession), 0, 0, 0, "csepl",
NULL, IPL_NET); /* XXX IPL_NET ("splcrypto") */
/*
* Preallocate space for 64 users, with 5 sessions each.
* (consider that a TLS protocol session requires at least
* 3DES, MD5, and SHA1 (both hashes are used in the PRF) for
* the negotiation, plus HMAC_SHA1 for the actual SSL records,
* consuming one session here for each algorithm.
*/
if ((error = pool_prime(&fcrpl, 64)) != 0 ||
(error = pool_prime(&csepl, 64 * 5)) != 0)
panic("%s: can't prime pool: %d", __func__, error);
}
void crypto_attach(device_t, device_t, void *);
void
crypto_attach(device_t parent, device_t self, void * opaque)
{
cryptoattach(0);
}
int crypto_detach(device_t, int);
int
crypto_detach(device_t self, int num)
{
pool_destroy(&fcrpl);
pool_destroy(&csepl);
mutex_destroy(&cryptodev_mtx);
return 0;
}
int crypto_match(device_t, cfdata_t, void *);
int
crypto_match(device_t parent, cfdata_t data, void *opaque)
{
return 1;
}
MODULE(MODULE_CLASS_DRIVER, crypto, "opencrypto");
CFDRIVER_DECL(crypto, DV_DULL, NULL);
CFATTACH_DECL2_NEW(crypto, 0, crypto_match, crypto_attach, crypto_detach,
NULL, NULL, NULL);
#ifdef _MODULE
static int cryptoloc[] = { -1, -1 };
static struct cfdata crypto_cfdata[] = {
{
.cf_name = "crypto",
.cf_atname = "crypto",
.cf_unit = 0,
.cf_fstate = 0,
.cf_loc = cryptoloc,
.cf_flags = 0,
.cf_pspec = NULL,
},
{ NULL, NULL, 0, 0, NULL, 0, NULL }
};
#endif
static int
crypto_modcmd(modcmd_t cmd, void *arg)
{
int error = 0;
#ifdef _MODULE
devmajor_t cmajor = NODEVMAJOR, bmajor = NODEVMAJOR;
#endif
switch (cmd) {
case MODULE_CMD_INIT:
#ifdef _MODULE
error = config_cfdriver_attach(&crypto_cd);
if (error) {
return error;
}
error = config_cfattach_attach(crypto_cd.cd_name, &crypto_ca);
if (error) {
config_cfdriver_detach(&crypto_cd);
aprint_error("%s: unable to register cfattach\n",
crypto_cd.cd_name);
return error;
}
error = config_cfdata_attach(crypto_cfdata, 1);
if (error) {
config_cfattach_detach(crypto_cd.cd_name, &crypto_ca);
config_cfdriver_detach(&crypto_cd);
aprint_error("%s: unable to register cfdata\n",
crypto_cd.cd_name);
return error;
}
error = devsw_attach(crypto_cd.cd_name, NULL, &bmajor,
&crypto_cdevsw, &cmajor);
if (error) {
error = config_cfdata_detach(crypto_cfdata);
if (error) {
return error;
}
config_cfattach_detach(crypto_cd.cd_name, &crypto_ca);
config_cfdriver_detach(&crypto_cd);
aprint_error("%s: unable to register devsw\n",
crypto_cd.cd_name);
return error;
}
(void)config_attach_pseudo(crypto_cfdata);
#endif
return error;
case MODULE_CMD_FINI:
#ifdef _MODULE
if (crypto_refcount != 0)
return EBUSY;
error = config_cfdata_detach(crypto_cfdata);
if (error) {
return error;
}
config_cfattach_detach(crypto_cd.cd_name, &crypto_ca);
config_cfdriver_detach(&crypto_cd);
devsw_detach(NULL, &crypto_cdevsw);
#endif
return error;
#ifdef _MODULE
case MODULE_CMD_AUTOUNLOAD:
#if 0 /*
* XXX Completely disable auto-unload for now, since there is still
* XXX a (small) window where in-module ref-counting doesn't help
*/
if (crypto_refcount != 0)
#endif
return EBUSY;
/* FALLTHROUGH */
#endif
default:
return ENOTTY;
}
}
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