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1304 lines
31 KiB
C
1304 lines
31 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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* Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
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* Copyright (c) 2014-2021 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by John-Mark Gurney
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* under sponsorship of the FreeBSD Foundation and
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* Rubicon Communications, LLC (Netgate).
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*
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* Portions of this software were developed by Ararat River
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* Consulting, LLC under sponsorship of the FreeBSD Foundation.
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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/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/proc.h>
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#include <sys/sysctl.h>
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#include <sys/errno.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 <sys/bus.h>
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#include <sys/sdt.h>
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#include <sys/syscallsubr.h>
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#include <opencrypto/cryptodev.h>
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#include <opencrypto/xform.h>
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SDT_PROVIDER_DECLARE(opencrypto);
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SDT_PROBE_DEFINE1(opencrypto, dev, ioctl, error, "int"/*line number*/);
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#ifdef COMPAT_FREEBSD12
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/*
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* Previously, most ioctls were performed against a cloned descriptor
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* of /dev/crypto obtained via CRIOGET. Now all ioctls are performed
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* against /dev/crypto directly.
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*/
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#define CRIOGET _IOWR('c', 100, uint32_t)
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#endif
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/* the following are done against the cloned descriptor */
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#ifdef COMPAT_FREEBSD32
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#include <sys/mount.h>
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#include <compat/freebsd32/freebsd32.h>
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struct session_op32 {
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uint32_t cipher;
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uint32_t mac;
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uint32_t keylen;
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uint32_t key;
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int mackeylen;
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uint32_t mackey;
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uint32_t ses;
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};
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struct session2_op32 {
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uint32_t cipher;
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uint32_t mac;
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uint32_t keylen;
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uint32_t key;
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int mackeylen;
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uint32_t mackey;
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uint32_t ses;
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int crid;
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int ivlen;
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int maclen;
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int pad[2];
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};
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struct crypt_op32 {
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uint32_t ses;
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uint16_t op;
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uint16_t flags;
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u_int len;
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uint32_t src, dst;
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uint32_t mac;
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uint32_t iv;
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};
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struct crypt_aead32 {
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uint32_t ses;
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uint16_t op;
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uint16_t flags;
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u_int len;
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u_int aadlen;
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u_int ivlen;
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uint32_t src;
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uint32_t dst;
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uint32_t aad;
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uint32_t tag;
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uint32_t iv;
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};
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#define CIOCGSESSION32 _IOWR('c', 101, struct session_op32)
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#define CIOCCRYPT32 _IOWR('c', 103, struct crypt_op32)
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#define CIOCGSESSION232 _IOWR('c', 106, struct session2_op32)
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#define CIOCCRYPTAEAD32 _IOWR('c', 109, struct crypt_aead32)
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static void
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session_op_from_32(const struct session_op32 *from, struct session2_op *to)
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{
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memset(to, 0, sizeof(*to));
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CP(*from, *to, cipher);
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CP(*from, *to, mac);
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CP(*from, *to, keylen);
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PTRIN_CP(*from, *to, key);
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CP(*from, *to, mackeylen);
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PTRIN_CP(*from, *to, mackey);
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CP(*from, *to, ses);
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to->crid = CRYPTOCAP_F_HARDWARE;
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}
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static void
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session2_op_from_32(const struct session2_op32 *from, struct session2_op *to)
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{
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session_op_from_32((const struct session_op32 *)from, to);
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CP(*from, *to, crid);
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CP(*from, *to, ivlen);
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CP(*from, *to, maclen);
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}
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static void
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session_op_to_32(const struct session2_op *from, struct session_op32 *to)
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{
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CP(*from, *to, cipher);
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CP(*from, *to, mac);
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CP(*from, *to, keylen);
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PTROUT_CP(*from, *to, key);
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CP(*from, *to, mackeylen);
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PTROUT_CP(*from, *to, mackey);
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CP(*from, *to, ses);
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}
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static void
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session2_op_to_32(const struct session2_op *from, struct session2_op32 *to)
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{
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session_op_to_32(from, (struct session_op32 *)to);
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CP(*from, *to, crid);
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}
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static void
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crypt_op_from_32(const struct crypt_op32 *from, struct crypt_op *to)
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{
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CP(*from, *to, ses);
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CP(*from, *to, op);
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CP(*from, *to, flags);
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CP(*from, *to, len);
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PTRIN_CP(*from, *to, src);
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PTRIN_CP(*from, *to, dst);
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PTRIN_CP(*from, *to, mac);
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PTRIN_CP(*from, *to, iv);
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}
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static void
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crypt_op_to_32(const struct crypt_op *from, struct crypt_op32 *to)
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{
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CP(*from, *to, ses);
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CP(*from, *to, op);
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CP(*from, *to, flags);
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CP(*from, *to, len);
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PTROUT_CP(*from, *to, src);
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PTROUT_CP(*from, *to, dst);
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PTROUT_CP(*from, *to, mac);
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PTROUT_CP(*from, *to, iv);
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}
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static void
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crypt_aead_from_32(const struct crypt_aead32 *from, struct crypt_aead *to)
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{
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CP(*from, *to, ses);
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CP(*from, *to, op);
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CP(*from, *to, flags);
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CP(*from, *to, len);
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CP(*from, *to, aadlen);
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CP(*from, *to, ivlen);
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PTRIN_CP(*from, *to, src);
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PTRIN_CP(*from, *to, dst);
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PTRIN_CP(*from, *to, aad);
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PTRIN_CP(*from, *to, tag);
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PTRIN_CP(*from, *to, iv);
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}
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static void
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crypt_aead_to_32(const struct crypt_aead *from, struct crypt_aead32 *to)
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{
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CP(*from, *to, ses);
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CP(*from, *to, op);
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CP(*from, *to, flags);
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CP(*from, *to, len);
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CP(*from, *to, aadlen);
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CP(*from, *to, ivlen);
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PTROUT_CP(*from, *to, src);
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PTROUT_CP(*from, *to, dst);
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PTROUT_CP(*from, *to, aad);
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PTROUT_CP(*from, *to, tag);
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PTROUT_CP(*from, *to, iv);
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}
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#endif
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static void
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session2_op_from_op(const struct session_op *from, struct session2_op *to)
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{
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memset(to, 0, sizeof(*to));
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memcpy(to, from, sizeof(*from));
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to->crid = CRYPTOCAP_F_HARDWARE;
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}
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static void
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session2_op_to_op(const struct session2_op *from, struct session_op *to)
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{
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memcpy(to, from, sizeof(*to));
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}
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struct csession {
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TAILQ_ENTRY(csession) next;
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crypto_session_t cses;
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volatile u_int refs;
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uint32_t ses;
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struct mtx lock; /* for op submission */
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u_int blocksize;
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int hashsize;
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int ivsize;
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void *key;
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void *mackey;
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};
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struct cryptop_data {
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struct csession *cse;
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char *buf;
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char *obuf;
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char *aad;
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bool done;
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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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struct mtx lock;
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};
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static bool use_outputbuffers;
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SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_use_output, CTLFLAG_RW,
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&use_outputbuffers, 0,
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"Use separate output buffers for /dev/crypto requests.");
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static bool use_separate_aad;
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SYSCTL_BOOL(_kern_crypto, OID_AUTO, cryptodev_separate_aad, CTLFLAG_RW,
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&use_separate_aad, 0,
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"Use separate AAD buffer for /dev/crypto requests.");
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static MALLOC_DEFINE(M_CRYPTODEV, "cryptodev", "/dev/crypto data buffers");
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/*
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* Check a crypto identifier to see if it requested
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* a software device/driver. This can be done either
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* by device name/class or through search constraints.
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*/
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static int
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checkforsoftware(int *cridp)
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{
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int crid;
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crid = *cridp;
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if (!crypto_devallowsoft) {
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if (crid & CRYPTOCAP_F_SOFTWARE) {
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if (crid & CRYPTOCAP_F_HARDWARE) {
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*cridp = CRYPTOCAP_F_HARDWARE;
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return 0;
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}
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return EINVAL;
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}
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if ((crid & CRYPTOCAP_F_HARDWARE) == 0 &&
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(crypto_getcaps(crid) & CRYPTOCAP_F_HARDWARE) == 0)
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return EINVAL;
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}
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return 0;
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}
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static int
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cse_create(struct fcrypt *fcr, struct session2_op *sop)
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{
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struct crypto_session_params csp;
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struct csession *cse;
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const struct enc_xform *txform;
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const struct auth_hash *thash;
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void *key = NULL;
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void *mackey = NULL;
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crypto_session_t cses;
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int crid, error, mac;
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mac = sop->mac;
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#ifdef COMPAT_FREEBSD12
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switch (sop->mac) {
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case CRYPTO_AES_128_NIST_GMAC:
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case CRYPTO_AES_192_NIST_GMAC:
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case CRYPTO_AES_256_NIST_GMAC:
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/* Should always be paired with GCM. */
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if (sop->cipher != CRYPTO_AES_NIST_GCM_16) {
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CRYPTDEB("GMAC without GCM");
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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return (EINVAL);
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}
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if (sop->keylen != sop->mackeylen) {
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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return (EINVAL);
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}
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mac = 0;
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break;
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case CRYPTO_AES_CCM_CBC_MAC:
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/* Should always be paired with CCM. */
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if (sop->cipher != CRYPTO_AES_CCM_16) {
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CRYPTDEB("CBC-MAC without CCM");
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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return (EINVAL);
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}
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if (sop->keylen != sop->mackeylen) {
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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return (EINVAL);
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}
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mac = 0;
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break;
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}
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#endif
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memset(&csp, 0, sizeof(csp));
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if (use_outputbuffers)
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csp.csp_flags |= CSP_F_SEPARATE_OUTPUT;
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if (mac != 0) {
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csp.csp_auth_alg = mac;
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csp.csp_auth_klen = sop->mackeylen;
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}
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if (sop->cipher != 0) {
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csp.csp_cipher_alg = sop->cipher;
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csp.csp_cipher_klen = sop->keylen;
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}
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thash = crypto_auth_hash(&csp);
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txform = crypto_cipher(&csp);
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if (txform != NULL && txform->macsize != 0) {
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if (mac != 0) {
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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return (EINVAL);
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}
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csp.csp_mode = CSP_MODE_AEAD;
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} else if (txform != NULL && thash != NULL) {
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csp.csp_mode = CSP_MODE_ETA;
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} else if (txform != NULL) {
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csp.csp_mode = CSP_MODE_CIPHER;
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} else if (thash != NULL) {
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csp.csp_mode = CSP_MODE_DIGEST;
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} else {
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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return (EINVAL);
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}
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switch (csp.csp_mode) {
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case CSP_MODE_AEAD:
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case CSP_MODE_ETA:
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if (use_separate_aad)
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csp.csp_flags |= CSP_F_SEPARATE_AAD;
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break;
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}
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|
|
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if (txform != NULL) {
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if (sop->keylen > txform->maxkey ||
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sop->keylen < txform->minkey) {
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CRYPTDEB("invalid cipher parameters");
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error = EINVAL;
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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goto bail;
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}
|
|
|
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key = malloc(csp.csp_cipher_klen, M_CRYPTODEV, M_WAITOK);
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error = copyin(sop->key, key, csp.csp_cipher_klen);
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if (error) {
|
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CRYPTDEB("invalid key");
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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goto bail;
|
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}
|
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csp.csp_cipher_key = key;
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csp.csp_ivlen = txform->ivsize;
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}
|
|
|
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if (thash != NULL) {
|
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if (sop->mackeylen > thash->keysize || sop->mackeylen < 0) {
|
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CRYPTDEB("invalid mac key length");
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error = EINVAL;
|
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
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goto bail;
|
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}
|
|
|
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if (csp.csp_auth_klen != 0) {
|
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mackey = malloc(csp.csp_auth_klen, M_CRYPTODEV,
|
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M_WAITOK);
|
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error = copyin(sop->mackey, mackey, csp.csp_auth_klen);
|
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if (error) {
|
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CRYPTDEB("invalid mac key");
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error,
|
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__LINE__);
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goto bail;
|
|
}
|
|
csp.csp_auth_key = mackey;
|
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}
|
|
|
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if (csp.csp_auth_alg == CRYPTO_AES_NIST_GMAC)
|
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csp.csp_ivlen = AES_GCM_IV_LEN;
|
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if (csp.csp_auth_alg == CRYPTO_AES_CCM_CBC_MAC)
|
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csp.csp_ivlen = AES_CCM_IV_LEN;
|
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}
|
|
|
|
if (sop->ivlen != 0) {
|
|
if (csp.csp_ivlen == 0) {
|
|
CRYPTDEB("does not support an IV");
|
|
error = EINVAL;
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
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goto bail;
|
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}
|
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csp.csp_ivlen = sop->ivlen;
|
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}
|
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if (sop->maclen != 0) {
|
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if (!(thash != NULL || csp.csp_mode == CSP_MODE_AEAD)) {
|
|
CRYPTDEB("does not support a MAC");
|
|
error = EINVAL;
|
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SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
goto bail;
|
|
}
|
|
csp.csp_auth_mlen = sop->maclen;
|
|
}
|
|
|
|
crid = sop->crid;
|
|
error = checkforsoftware(&crid);
|
|
if (error) {
|
|
CRYPTDEB("checkforsoftware");
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
goto bail;
|
|
}
|
|
error = crypto_newsession(&cses, &csp, crid);
|
|
if (error) {
|
|
CRYPTDEB("crypto_newsession");
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
goto bail;
|
|
}
|
|
|
|
cse = malloc(sizeof(struct csession), M_CRYPTODEV, M_WAITOK | M_ZERO);
|
|
mtx_init(&cse->lock, "cryptodev", "crypto session lock", MTX_DEF);
|
|
refcount_init(&cse->refs, 1);
|
|
cse->key = key;
|
|
cse->mackey = mackey;
|
|
cse->cses = cses;
|
|
if (sop->maclen != 0)
|
|
cse->hashsize = sop->maclen;
|
|
else if (thash != NULL)
|
|
cse->hashsize = thash->hashsize;
|
|
else if (csp.csp_mode == CSP_MODE_AEAD)
|
|
cse->hashsize = txform->macsize;
|
|
cse->ivsize = csp.csp_ivlen;
|
|
|
|
/*
|
|
* NB: This isn't necessarily the block size of the underlying
|
|
* MAC or cipher but is instead a restriction on valid input
|
|
* sizes.
|
|
*/
|
|
if (txform != NULL)
|
|
cse->blocksize = txform->blocksize;
|
|
else
|
|
cse->blocksize = 1;
|
|
|
|
mtx_lock(&fcr->lock);
|
|
TAILQ_INSERT_TAIL(&fcr->csessions, cse, next);
|
|
cse->ses = fcr->sesn++;
|
|
mtx_unlock(&fcr->lock);
|
|
|
|
sop->ses = cse->ses;
|
|
|
|
/* return hardware/driver id */
|
|
sop->crid = crypto_ses2hid(cse->cses);
|
|
bail:
|
|
if (error) {
|
|
free(key, M_CRYPTODEV);
|
|
free(mackey, M_CRYPTODEV);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static struct csession *
|
|
cse_find(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 void
|
|
cse_free(struct csession *cse)
|
|
{
|
|
|
|
if (!refcount_release(&cse->refs))
|
|
return;
|
|
crypto_freesession(cse->cses);
|
|
mtx_destroy(&cse->lock);
|
|
if (cse->key)
|
|
free(cse->key, M_CRYPTODEV);
|
|
if (cse->mackey)
|
|
free(cse->mackey, M_CRYPTODEV);
|
|
free(cse, M_CRYPTODEV);
|
|
}
|
|
|
|
static bool
|
|
cse_delete(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);
|
|
cse_free(cse);
|
|
return (true);
|
|
}
|
|
}
|
|
mtx_unlock(&fcr->lock);
|
|
return (false);
|
|
}
|
|
|
|
static struct cryptop_data *
|
|
cod_alloc(struct csession *cse, size_t aad_len, size_t len)
|
|
{
|
|
struct cryptop_data *cod;
|
|
|
|
cod = malloc(sizeof(struct cryptop_data), M_CRYPTODEV, 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_CRYPTODEV, M_WAITOK);
|
|
cod->buf = malloc(len, M_CRYPTODEV, M_WAITOK);
|
|
} else
|
|
cod->buf = malloc(aad_len + len, M_CRYPTODEV, M_WAITOK);
|
|
if (crypto_get_params(cse->cses)->csp_flags & CSP_F_SEPARATE_OUTPUT)
|
|
cod->obuf = malloc(len, M_CRYPTODEV, M_WAITOK);
|
|
return (cod);
|
|
}
|
|
|
|
static void
|
|
cod_free(struct cryptop_data *cod)
|
|
{
|
|
|
|
free(cod->aad, M_CRYPTODEV);
|
|
free(cod->obuf, M_CRYPTODEV);
|
|
free(cod->buf, M_CRYPTODEV);
|
|
free(cod, M_CRYPTODEV);
|
|
}
|
|
|
|
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 int
|
|
cryptodev_op(struct csession *cse, const struct crypt_op *cop)
|
|
{
|
|
const struct crypto_session_params *csp;
|
|
struct cryptop_data *cod = NULL;
|
|
struct cryptop *crp = NULL;
|
|
char *dst;
|
|
int error;
|
|
|
|
if (cop->len > 256*1024-4) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
return (E2BIG);
|
|
}
|
|
|
|
if ((cop->len % cse->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);
|
|
dst = cop->dst;
|
|
|
|
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;
|
|
|
|
csp = crypto_get_params(cse->cses);
|
|
switch (csp->csp_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:
|
|
if (cop->len == 0 ||
|
|
(cop->iv == NULL && cop->len == cse->ivsize)) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
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_AEAD:
|
|
if (cse->ivsize != 0 && cop->iv == NULL) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
/* FALLTHROUGH */
|
|
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) {
|
|
if (crp->crp_payload_length < cse->ivsize) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
crp->crp_iv_start = 0;
|
|
crp->crp_payload_length -= cse->ivsize;
|
|
if (crp->crp_payload_length != 0)
|
|
crp->crp_payload_start = cse->ivsize;
|
|
dst += cse->ivsize;
|
|
}
|
|
|
|
if (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, 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)
|
|
{
|
|
const struct crypto_session_params *csp;
|
|
struct cryptop_data *cod = NULL;
|
|
struct cryptop *crp = NULL;
|
|
char *dst;
|
|
int error;
|
|
|
|
if (caead->len > 256*1024-4 || caead->aadlen > 256*1024-4) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
return (E2BIG);
|
|
}
|
|
|
|
if ((caead->len % cse->blocksize) != 0) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
return (EINVAL);
|
|
}
|
|
|
|
if (cse->hashsize == 0 || caead->tag == NULL) {
|
|
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);
|
|
dst = caead->dst;
|
|
|
|
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;
|
|
|
|
csp = crypto_get_params(cse->cses);
|
|
switch (csp->csp_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 (csp->csp_mode == CSP_MODE_ETA &&
|
|
csp->csp_cipher_alg == CRYPTO_AES_XTS &&
|
|
caead->ivlen == AES_BLOCK_LEN)
|
|
caead->ivlen = AES_XTS_IV_LEN;
|
|
|
|
if (cse->ivsize == 0) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
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 {
|
|
error = EINVAL;
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
goto bail;
|
|
}
|
|
|
|
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, 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_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);
|
|
}
|
|
|
|
static void
|
|
fcrypt_dtor(void *data)
|
|
{
|
|
struct fcrypt *fcr = data;
|
|
struct csession *cse;
|
|
|
|
while ((cse = TAILQ_FIRST(&fcr->csessions))) {
|
|
TAILQ_REMOVE(&fcr->csessions, cse, next);
|
|
KASSERT(refcount_load(&cse->refs) == 1,
|
|
("%s: crypto session %p with %d refs", __func__, cse,
|
|
refcount_load(&cse->refs)));
|
|
cse_free(cse);
|
|
}
|
|
mtx_destroy(&fcr->lock);
|
|
free(fcr, M_CRYPTODEV);
|
|
}
|
|
|
|
static int
|
|
crypto_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
|
|
{
|
|
struct fcrypt *fcr;
|
|
int error;
|
|
|
|
fcr = malloc(sizeof(struct fcrypt), M_CRYPTODEV, M_WAITOK | M_ZERO);
|
|
TAILQ_INIT(&fcr->csessions);
|
|
mtx_init(&fcr->lock, "fcrypt", NULL, MTX_DEF);
|
|
error = devfs_set_cdevpriv(fcr, fcrypt_dtor);
|
|
if (error)
|
|
fcrypt_dtor(fcr);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
crypto_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag,
|
|
struct thread *td)
|
|
{
|
|
struct fcrypt *fcr;
|
|
struct csession *cse;
|
|
struct session2_op *sop;
|
|
struct crypt_op *cop;
|
|
struct crypt_aead *caead;
|
|
uint32_t ses;
|
|
int error = 0;
|
|
union {
|
|
struct session2_op sopc;
|
|
#ifdef COMPAT_FREEBSD32
|
|
struct crypt_op copc;
|
|
struct crypt_aead aeadc;
|
|
#endif
|
|
} thunk;
|
|
#ifdef COMPAT_FREEBSD32
|
|
u_long cmd32;
|
|
void *data32;
|
|
|
|
cmd32 = 0;
|
|
data32 = NULL;
|
|
switch (cmd) {
|
|
case CIOCGSESSION32:
|
|
cmd32 = cmd;
|
|
data32 = data;
|
|
cmd = CIOCGSESSION;
|
|
data = (void *)&thunk.sopc;
|
|
session_op_from_32((struct session_op32 *)data32, &thunk.sopc);
|
|
break;
|
|
case CIOCGSESSION232:
|
|
cmd32 = cmd;
|
|
data32 = data;
|
|
cmd = CIOCGSESSION2;
|
|
data = (void *)&thunk.sopc;
|
|
session2_op_from_32((struct session2_op32 *)data32,
|
|
&thunk.sopc);
|
|
break;
|
|
case CIOCCRYPT32:
|
|
cmd32 = cmd;
|
|
data32 = data;
|
|
cmd = CIOCCRYPT;
|
|
data = (void *)&thunk.copc;
|
|
crypt_op_from_32((struct crypt_op32 *)data32, &thunk.copc);
|
|
break;
|
|
case CIOCCRYPTAEAD32:
|
|
cmd32 = cmd;
|
|
data32 = data;
|
|
cmd = CIOCCRYPTAEAD;
|
|
data = (void *)&thunk.aeadc;
|
|
crypt_aead_from_32((struct crypt_aead32 *)data32, &thunk.aeadc);
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
devfs_get_cdevpriv((void **)&fcr);
|
|
|
|
switch (cmd) {
|
|
#ifdef COMPAT_FREEBSD12
|
|
case CRIOGET:
|
|
/*
|
|
* NB: This may fail in cases that the old
|
|
* implementation did not if the current process has
|
|
* restricted filesystem access (e.g. running in a
|
|
* jail that does not expose /dev/crypto or in
|
|
* capability mode).
|
|
*/
|
|
error = kern_openat(td, AT_FDCWD, "/dev/crypto", UIO_SYSSPACE,
|
|
O_RDWR, 0);
|
|
if (error == 0)
|
|
*(uint32_t *)data = td->td_retval[0];
|
|
break;
|
|
#endif
|
|
case CIOCGSESSION:
|
|
case CIOCGSESSION2:
|
|
if (cmd == CIOCGSESSION) {
|
|
session2_op_from_op((void *)data, &thunk.sopc);
|
|
sop = &thunk.sopc;
|
|
} else
|
|
sop = (struct session2_op *)data;
|
|
|
|
error = cse_create(fcr, sop);
|
|
if (cmd == CIOCGSESSION && error == 0)
|
|
session2_op_to_op(sop, (void *)data);
|
|
break;
|
|
case CIOCFSESSION:
|
|
ses = *(uint32_t *)data;
|
|
if (!cse_delete(fcr, ses)) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
return (EINVAL);
|
|
}
|
|
break;
|
|
case CIOCCRYPT:
|
|
cop = (struct crypt_op *)data;
|
|
cse = cse_find(fcr, cop->ses);
|
|
if (cse == NULL) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
return (EINVAL);
|
|
}
|
|
error = cryptodev_op(cse, cop);
|
|
cse_free(cse);
|
|
break;
|
|
case CIOCFINDDEV:
|
|
error = cryptodev_find((struct crypt_find_op *)data);
|
|
break;
|
|
case CIOCCRYPTAEAD:
|
|
caead = (struct crypt_aead *)data;
|
|
cse = cse_find(fcr, caead->ses);
|
|
if (cse == NULL) {
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
return (EINVAL);
|
|
}
|
|
error = cryptodev_aead(cse, caead);
|
|
cse_free(cse);
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__);
|
|
break;
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD32
|
|
switch (cmd32) {
|
|
case CIOCGSESSION32:
|
|
if (error == 0)
|
|
session_op_to_32((void *)data, data32);
|
|
break;
|
|
case CIOCGSESSION232:
|
|
if (error == 0)
|
|
session2_op_to_32((void *)data, data32);
|
|
break;
|
|
case CIOCCRYPT32:
|
|
if (error == 0)
|
|
crypt_op_to_32((void *)data, data32);
|
|
break;
|
|
case CIOCCRYPTAEAD32:
|
|
if (error == 0)
|
|
crypt_aead_to_32((void *)data, data32);
|
|
break;
|
|
}
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
static struct cdevsw crypto_cdevsw = {
|
|
.d_version = D_VERSION,
|
|
.d_open = crypto_open,
|
|
.d_ioctl = crypto_ioctl,
|
|
.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);
|