a0fbccc9e7
Don't grab Giant in the upper syscall/wrapper code NET_LOCK_GIANT in the socket code (sockets/fifos). mtx_lock(&Giant) in the vnode code. mtx_lock(&Giant) in the opencrypto code. (This may actually not be needed, but better safe than sorry). Devfs grabs Giant if the driver is marked as needing Giant.
823 lines
18 KiB
C
823 lines
18 KiB
C
/* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
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/*
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* Copyright (c) 2001 Theo de Raadt
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Effort sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F30602-01-2-0537.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sysctl.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/errno.h>
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#include <sys/uio.h>
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#include <sys/random.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/fcntl.h>
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#include <opencrypto/cryptodev.h>
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#include <opencrypto/xform.h>
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struct csession {
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TAILQ_ENTRY(csession) next;
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u_int64_t sid;
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u_int32_t ses;
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struct mtx lock; /* for op submission */
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u_int32_t cipher;
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struct enc_xform *txform;
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u_int32_t mac;
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struct auth_hash *thash;
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caddr_t key;
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int keylen;
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u_char tmp_iv[EALG_MAX_BLOCK_LEN];
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caddr_t mackey;
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int mackeylen;
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u_char tmp_mac[CRYPTO_MAX_MAC_LEN];
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struct iovec iovec;
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struct uio uio;
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int error;
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};
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struct fcrypt {
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TAILQ_HEAD(csessionlist, csession) csessions;
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int sesn;
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};
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static int cryptof_rw(struct file *fp, struct uio *uio,
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struct ucred *cred, int flags, struct thread *);
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static int cryptof_ioctl(struct file *, u_long, void *,
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struct ucred *, struct thread *);
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static int cryptof_poll(struct file *, int, struct ucred *, struct thread *);
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static int cryptof_kqfilter(struct file *, struct knote *);
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static int cryptof_stat(struct file *, struct stat *,
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struct ucred *, struct thread *);
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static int cryptof_close(struct file *, struct thread *);
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static struct fileops cryptofops = {
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.fo_read = cryptof_rw,
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.fo_write = cryptof_rw,
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.fo_ioctl = cryptof_ioctl,
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.fo_poll = cryptof_poll,
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.fo_kqfilter = cryptof_kqfilter,
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.fo_stat = cryptof_stat,
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.fo_close = cryptof_close
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};
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static struct csession *csefind(struct fcrypt *, u_int);
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static int csedelete(struct fcrypt *, struct csession *);
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static struct csession *cseadd(struct fcrypt *, struct csession *);
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static struct csession *csecreate(struct fcrypt *, u_int64_t, caddr_t,
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u_int64_t, caddr_t, u_int64_t, u_int32_t, u_int32_t, struct enc_xform *,
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struct auth_hash *);
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static int csefree(struct csession *);
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static int cryptodev_op(struct csession *, struct crypt_op *,
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struct ucred *, struct thread *td);
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static int cryptodev_key(struct crypt_kop *);
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static int
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cryptof_rw(
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struct file *fp,
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struct uio *uio,
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struct ucred *active_cred,
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int flags,
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struct thread *td)
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{
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return (EIO);
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}
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/* ARGSUSED */
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static int
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cryptof_ioctl(
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struct file *fp,
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u_long cmd,
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void *data,
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struct ucred *active_cred,
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struct thread *td)
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{
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struct cryptoini cria, crie;
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struct fcrypt *fcr = fp->f_data;
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struct csession *cse;
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struct session_op *sop;
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struct crypt_op *cop;
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struct enc_xform *txform = NULL;
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struct auth_hash *thash = NULL;
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u_int64_t sid;
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u_int32_t ses;
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int error = 0;
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/*
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* XXX: Not sure Giant is needed, but better safe than sorry
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*/
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mtx_lock(&Giant);
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switch (cmd) {
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case CIOCGSESSION:
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sop = (struct session_op *)data;
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switch (sop->cipher) {
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case 0:
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break;
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case CRYPTO_DES_CBC:
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txform = &enc_xform_des;
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break;
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case CRYPTO_3DES_CBC:
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txform = &enc_xform_3des;
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break;
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case CRYPTO_BLF_CBC:
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txform = &enc_xform_blf;
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break;
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case CRYPTO_CAST_CBC:
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txform = &enc_xform_cast5;
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break;
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case CRYPTO_SKIPJACK_CBC:
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txform = &enc_xform_skipjack;
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break;
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case CRYPTO_AES_CBC:
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txform = &enc_xform_rijndael128;
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break;
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case CRYPTO_NULL_CBC:
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txform = &enc_xform_null;
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break;
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case CRYPTO_ARC4:
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txform = &enc_xform_arc4;
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break;
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default:
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mtx_unlock(&Giant);
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return (EINVAL);
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}
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switch (sop->mac) {
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case 0:
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break;
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case CRYPTO_MD5_HMAC:
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thash = &auth_hash_hmac_md5_96;
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break;
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case CRYPTO_SHA1_HMAC:
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thash = &auth_hash_hmac_sha1_96;
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break;
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case CRYPTO_SHA2_HMAC:
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if (sop->mackeylen == auth_hash_hmac_sha2_256.keysize)
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thash = &auth_hash_hmac_sha2_256;
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else if (sop->mackeylen == auth_hash_hmac_sha2_384.keysize)
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thash = &auth_hash_hmac_sha2_384;
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else if (sop->mackeylen == auth_hash_hmac_sha2_512.keysize)
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thash = &auth_hash_hmac_sha2_512;
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else {
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mtx_unlock(&Giant);
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return (EINVAL);
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}
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break;
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case CRYPTO_RIPEMD160_HMAC:
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thash = &auth_hash_hmac_ripemd_160_96;
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break;
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#ifdef notdef
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case CRYPTO_MD5:
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thash = &auth_hash_md5;
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break;
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case CRYPTO_SHA1:
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thash = &auth_hash_sha1;
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break;
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#endif
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case CRYPTO_NULL_HMAC:
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thash = &auth_hash_null;
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break;
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default:
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mtx_unlock(&Giant);
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return (EINVAL);
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}
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bzero(&crie, sizeof(crie));
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bzero(&cria, sizeof(cria));
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if (txform) {
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crie.cri_alg = txform->type;
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crie.cri_klen = sop->keylen * 8;
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if (sop->keylen > txform->maxkey ||
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sop->keylen < txform->minkey) {
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error = EINVAL;
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goto bail;
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}
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MALLOC(crie.cri_key, u_int8_t *,
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crie.cri_klen / 8, M_XDATA, M_WAITOK);
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if ((error = copyin(sop->key, crie.cri_key,
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crie.cri_klen / 8)))
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goto bail;
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if (thash)
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crie.cri_next = &cria;
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}
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if (thash) {
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cria.cri_alg = thash->type;
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cria.cri_klen = sop->mackeylen * 8;
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if (sop->mackeylen != thash->keysize) {
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error = EINVAL;
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goto bail;
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}
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if (cria.cri_klen) {
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MALLOC(cria.cri_key, u_int8_t *,
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cria.cri_klen / 8, M_XDATA, M_WAITOK);
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if ((error = copyin(sop->mackey, cria.cri_key,
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cria.cri_klen / 8)))
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goto bail;
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}
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}
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error = crypto_newsession(&sid, (txform ? &crie : &cria), 1);
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if (error)
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goto bail;
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cse = csecreate(fcr, sid, crie.cri_key, crie.cri_klen,
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cria.cri_key, cria.cri_klen, sop->cipher, sop->mac, txform,
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thash);
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if (cse == NULL) {
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crypto_freesession(sid);
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error = EINVAL;
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goto bail;
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}
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sop->ses = cse->ses;
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bail:
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if (error) {
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if (crie.cri_key)
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FREE(crie.cri_key, M_XDATA);
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if (cria.cri_key)
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FREE(cria.cri_key, M_XDATA);
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}
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break;
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case CIOCFSESSION:
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ses = *(u_int32_t *)data;
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cse = csefind(fcr, ses);
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if (cse == NULL) {
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mtx_unlock(&Giant);
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return (EINVAL);
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}
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csedelete(fcr, cse);
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error = csefree(cse);
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break;
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case CIOCCRYPT:
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cop = (struct crypt_op *)data;
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cse = csefind(fcr, cop->ses);
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if (cse == NULL) {
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mtx_unlock(&Giant);
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return (EINVAL);
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}
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error = cryptodev_op(cse, cop, active_cred, td);
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break;
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case CIOCKEY:
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error = cryptodev_key((struct crypt_kop *)data);
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break;
|
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case CIOCASYMFEAT:
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error = crypto_getfeat((int *)data);
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break;
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default:
|
|
error = EINVAL;
|
|
}
|
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mtx_unlock(&Giant);
|
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return (error);
|
|
}
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|
|
static int cryptodev_cb(void *);
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|
|
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static int
|
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cryptodev_op(
|
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struct csession *cse,
|
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struct crypt_op *cop,
|
|
struct ucred *active_cred,
|
|
struct thread *td)
|
|
{
|
|
struct cryptop *crp = NULL;
|
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struct cryptodesc *crde = NULL, *crda = NULL;
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int error;
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|
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if (cop->len > 256*1024-4)
|
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return (E2BIG);
|
|
|
|
if (cse->txform && (cop->len % cse->txform->blocksize) != 0)
|
|
return (EINVAL);
|
|
|
|
cse->uio.uio_iov = &cse->iovec;
|
|
cse->uio.uio_iovcnt = 1;
|
|
cse->uio.uio_offset = 0;
|
|
cse->uio.uio_resid = cop->len;
|
|
cse->uio.uio_segflg = UIO_SYSSPACE;
|
|
cse->uio.uio_rw = UIO_WRITE;
|
|
cse->uio.uio_td = td;
|
|
cse->uio.uio_iov[0].iov_len = cop->len;
|
|
cse->uio.uio_iov[0].iov_base = malloc(cop->len, M_XDATA, M_WAITOK);
|
|
|
|
crp = crypto_getreq((cse->txform != NULL) + (cse->thash != NULL));
|
|
if (crp == NULL) {
|
|
error = ENOMEM;
|
|
goto bail;
|
|
}
|
|
|
|
if (cse->thash) {
|
|
crda = crp->crp_desc;
|
|
if (cse->txform)
|
|
crde = crda->crd_next;
|
|
} else {
|
|
if (cse->txform)
|
|
crde = crp->crp_desc;
|
|
else {
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
if ((error = copyin(cop->src, cse->uio.uio_iov[0].iov_base, cop->len)))
|
|
goto bail;
|
|
|
|
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;
|
|
}
|
|
|
|
if (crde) {
|
|
if (cop->op == COP_ENCRYPT)
|
|
crde->crd_flags |= CRD_F_ENCRYPT;
|
|
else
|
|
crde->crd_flags &= ~CRD_F_ENCRYPT;
|
|
crde->crd_len = cop->len;
|
|
crde->crd_inject = 0;
|
|
|
|
crde->crd_alg = cse->cipher;
|
|
crde->crd_key = cse->key;
|
|
crde->crd_klen = cse->keylen * 8;
|
|
}
|
|
|
|
crp->crp_ilen = cop->len;
|
|
crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
|
|
| (cop->flags & COP_F_BATCH);
|
|
crp->crp_buf = (caddr_t)&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->cipher == CRYPTO_ARC4) { /* XXX use flag? */
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
if ((error = copyin(cop->iv, cse->tmp_iv, cse->txform->blocksize)))
|
|
goto bail;
|
|
bcopy(cse->tmp_iv, crde->crd_iv, cse->txform->blocksize);
|
|
crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
|
|
crde->crd_skip = 0;
|
|
} else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
|
|
crde->crd_skip = 0;
|
|
} else if (crde) {
|
|
crde->crd_flags |= CRD_F_IV_PRESENT;
|
|
crde->crd_skip = cse->txform->blocksize;
|
|
crde->crd_len -= cse->txform->blocksize;
|
|
}
|
|
|
|
if (cop->mac) {
|
|
if (crda == NULL) {
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
crp->crp_mac=cse->tmp_mac;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
mtx_lock(&cse->lock);
|
|
if (error == 0 && (crp->crp_flags & CRYPTO_F_DONE) == 0)
|
|
error = msleep(crp, &cse->lock, PWAIT, "crydev", 0);
|
|
mtx_unlock(&cse->lock);
|
|
|
|
if (error != 0)
|
|
goto bail;
|
|
|
|
if (crp->crp_etype != 0) {
|
|
error = crp->crp_etype;
|
|
goto bail;
|
|
}
|
|
|
|
if (cse->error) {
|
|
error = cse->error;
|
|
goto bail;
|
|
}
|
|
|
|
if (cop->dst &&
|
|
(error = copyout(cse->uio.uio_iov[0].iov_base, cop->dst, cop->len)))
|
|
goto bail;
|
|
|
|
if (cop->mac &&
|
|
(error = copyout(crp->crp_mac, cop->mac, cse->thash->authsize)))
|
|
goto bail;
|
|
|
|
bail:
|
|
if (crp)
|
|
crypto_freereq(crp);
|
|
if (cse->uio.uio_iov[0].iov_base)
|
|
free(cse->uio.uio_iov[0].iov_base, M_XDATA);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
cryptodev_cb(void *op)
|
|
{
|
|
struct cryptop *crp = (struct cryptop *) op;
|
|
struct csession *cse = (struct csession *)crp->crp_opaque;
|
|
|
|
cse->error = crp->crp_etype;
|
|
if (crp->crp_etype == EAGAIN)
|
|
return crypto_dispatch(crp);
|
|
mtx_lock(&cse->lock);
|
|
wakeup_one(crp);
|
|
mtx_unlock(&cse->lock);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
cryptodevkey_cb(void *op)
|
|
{
|
|
struct cryptkop *krp = (struct cryptkop *) op;
|
|
|
|
wakeup(krp);
|
|
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);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
krp = (struct cryptkop *)malloc(sizeof *krp, M_XDATA, M_WAITOK);
|
|
if (!krp)
|
|
return (ENOMEM);
|
|
bzero(krp, sizeof *krp);
|
|
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;
|
|
MALLOC(krp->krp_param[i].crp_p, caddr_t, 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)
|
|
goto fail;
|
|
}
|
|
|
|
error = crypto_kdispatch(krp);
|
|
if (error)
|
|
goto fail;
|
|
error = tsleep(krp, PSOCK, "crydev", 0);
|
|
if (error) {
|
|
/* XXX can this happen? if so, how do we recover? */
|
|
goto fail;
|
|
}
|
|
|
|
if (krp->krp_status != 0) {
|
|
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)
|
|
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);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
cryptof_poll(
|
|
struct file *fp,
|
|
int events,
|
|
struct ucred *active_cred,
|
|
struct thread *td)
|
|
{
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
cryptof_kqfilter(struct file *fp, struct knote *kn)
|
|
{
|
|
|
|
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);
|
|
(void)csefree(cse);
|
|
}
|
|
FREE(fcr, M_XDATA);
|
|
fp->f_data = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static struct csession *
|
|
csefind(struct fcrypt *fcr, u_int ses)
|
|
{
|
|
struct csession *cse;
|
|
|
|
TAILQ_FOREACH(cse, &fcr->csessions, next)
|
|
if (cse->ses == ses)
|
|
return (cse);
|
|
return (NULL);
|
|
}
|
|
|
|
static int
|
|
csedelete(struct fcrypt *fcr, struct csession *cse_del)
|
|
{
|
|
struct csession *cse;
|
|
|
|
TAILQ_FOREACH(cse, &fcr->csessions, next) {
|
|
if (cse == cse_del) {
|
|
TAILQ_REMOVE(&fcr->csessions, cse, next);
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct csession *
|
|
cseadd(struct fcrypt *fcr, struct csession *cse)
|
|
{
|
|
TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
|
|
cse->ses = fcr->sesn++;
|
|
return (cse);
|
|
}
|
|
|
|
struct csession *
|
|
csecreate(struct fcrypt *fcr, u_int64_t sid, caddr_t key, u_int64_t keylen,
|
|
caddr_t mackey, u_int64_t mackeylen, u_int32_t cipher, u_int32_t mac,
|
|
struct enc_xform *txform, struct auth_hash *thash)
|
|
{
|
|
struct csession *cse;
|
|
|
|
#ifdef INVARIANTS
|
|
/* NB: required when mtx_init is built with INVARIANTS */
|
|
MALLOC(cse, struct csession *, sizeof(struct csession),
|
|
M_XDATA, M_NOWAIT | M_ZERO);
|
|
#else
|
|
MALLOC(cse, struct csession *, sizeof(struct csession),
|
|
M_XDATA, M_NOWAIT);
|
|
#endif
|
|
if (cse == NULL)
|
|
return NULL;
|
|
mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
|
|
cse->key = key;
|
|
cse->keylen = keylen/8;
|
|
cse->mackey = mackey;
|
|
cse->mackeylen = mackeylen/8;
|
|
cse->sid = sid;
|
|
cse->cipher = cipher;
|
|
cse->mac = mac;
|
|
cse->txform = txform;
|
|
cse->thash = thash;
|
|
cseadd(fcr, cse);
|
|
return (cse);
|
|
}
|
|
|
|
static int
|
|
csefree(struct csession *cse)
|
|
{
|
|
int error;
|
|
|
|
error = crypto_freesession(cse->sid);
|
|
mtx_destroy(&cse->lock);
|
|
if (cse->key)
|
|
FREE(cse->key, M_XDATA);
|
|
if (cse->mackey)
|
|
FREE(cse->mackey, M_XDATA);
|
|
FREE(cse, M_XDATA);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
cryptoopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
|
|
{
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
cryptoread(struct cdev *dev, struct uio *uio, int ioflag)
|
|
{
|
|
return (EIO);
|
|
}
|
|
|
|
static int
|
|
cryptowrite(struct cdev *dev, struct uio *uio, int ioflag)
|
|
{
|
|
return (EIO);
|
|
}
|
|
|
|
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:
|
|
MALLOC(fcr, struct fcrypt *,
|
|
sizeof(struct fcrypt), M_XDATA, M_WAITOK);
|
|
TAILQ_INIT(&fcr->csessions);
|
|
fcr->sesn = 0;
|
|
|
|
error = falloc(td, &f, &fd);
|
|
|
|
if (error) {
|
|
FREE(fcr, M_XDATA);
|
|
return (error);
|
|
}
|
|
/* falloc automatically provides an extra reference to 'f'. */
|
|
f->f_flag = FREAD | FWRITE;
|
|
f->f_type = DTYPE_CRYPTO;
|
|
f->f_ops = &cryptofops;
|
|
f->f_data = fcr;
|
|
*(u_int32_t *)data = fd;
|
|
fdrop(f, td);
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
#define CRYPTO_MAJOR 70 /* from openbsd */
|
|
static struct cdevsw crypto_cdevsw = {
|
|
.d_version = D_VERSION,
|
|
.d_flags = D_NEEDGIANT,
|
|
.d_open = cryptoopen,
|
|
.d_read = cryptoread,
|
|
.d_write = cryptowrite,
|
|
.d_ioctl = cryptoioctl,
|
|
.d_name = "crypto",
|
|
.d_maj = CRYPTO_MAJOR,
|
|
};
|
|
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);
|