1070 lines
27 KiB
C
1070 lines
27 KiB
C
/* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
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/*-
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* Linux port done by David McCullough <david_mccullough@mcafee.com>
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* Copyright (C) 2006-2010 David McCullough
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* Copyright (C) 2004-2005 Intel Corporation.
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* The license and original author are listed below.
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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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*
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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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__FBSDID("$FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.34 2007/05/09 19:37:02 gnn Exp $");
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*/
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#include <linux/version.h>
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) && !defined(AUTOCONF_INCLUDED)
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#include <linux/config.h>
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#endif
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#include <linux/types.h>
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#include <linux/time.h>
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#include <linux/delay.h>
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#include <linux/list.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/unistd.h>
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#include <linux/module.h>
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/dcache.h>
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#include <linux/file.h>
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#include <linux/mount.h>
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#include <linux/miscdevice.h>
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#include <asm/uaccess.h>
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#include <cryptodev.h>
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#include <uio.h>
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extern asmlinkage long sys_dup(unsigned int fildes);
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#define debug cryptodev_debug
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int cryptodev_debug = 0;
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module_param(cryptodev_debug, int, 0644);
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MODULE_PARM_DESC(cryptodev_debug, "Enable cryptodev debug");
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struct csession_info {
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u_int16_t blocksize;
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u_int16_t minkey, maxkey;
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u_int16_t keysize;
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/* u_int16_t hashsize; */
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u_int16_t authsize;
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u_int16_t authkey;
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/* u_int16_t ctxsize; */
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};
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struct csession {
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struct list_head list;
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u_int64_t sid;
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u_int32_t ses;
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wait_queue_head_t waitq;
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u_int32_t cipher;
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u_int32_t mac;
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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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struct csession_info info;
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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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struct list_head csessions;
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int sesn;
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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,
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struct cryptoini *crie, struct cryptoini *cria, struct csession_info *);
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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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static int cryptodev_key(struct crypt_kop *);
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static int cryptodev_find(struct crypt_find_op *);
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static int cryptodev_cb(void *);
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static int cryptodev_open(struct inode *inode, struct file *filp);
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/*
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* Check a crypto identifier to see if it requested
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* a valid crid and it's capabilities match.
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*/
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static int
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checkcrid(int crid)
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{
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int hid = crid & ~(CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE);
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int typ = crid & (CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE);
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int caps = 0;
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/* if the user hasn't selected a driver, then just call newsession */
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if (hid == 0 && typ != 0)
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return 0;
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caps = crypto_getcaps(hid);
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/* didn't find anything with capabilities */
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if (caps == 0) {
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dprintk("%s: hid=%x typ=%x not matched\n", __FUNCTION__, hid, typ);
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return EINVAL;
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}
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/* the user didn't specify SW or HW, so the driver is ok */
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if (typ == 0)
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return 0;
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/* if the type specified didn't match */
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if (typ != (caps & (CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE))) {
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dprintk("%s: hid=%x typ=%x caps=%x not matched\n", __FUNCTION__,
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hid, typ, caps);
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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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cryptodev_op(struct csession *cse, struct crypt_op *cop)
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{
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struct cryptop *crp = NULL;
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struct cryptodesc *crde = NULL, *crda = NULL;
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int error = 0;
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dprintk("%s()\n", __FUNCTION__);
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if (cop->len > CRYPTO_MAX_DATA_LEN) {
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dprintk("%s: %d > %d\n", __FUNCTION__, cop->len, CRYPTO_MAX_DATA_LEN);
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return (E2BIG);
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}
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if (cse->info.blocksize && (cop->len % cse->info.blocksize) != 0) {
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dprintk("%s: blocksize=%d len=%d\n", __FUNCTION__, cse->info.blocksize,
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cop->len);
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return (EINVAL);
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}
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cse->uio.uio_iov = &cse->iovec;
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cse->uio.uio_iovcnt = 1;
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cse->uio.uio_offset = 0;
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#if 0
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cse->uio.uio_resid = cop->len;
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cse->uio.uio_segflg = UIO_SYSSPACE;
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cse->uio.uio_rw = UIO_WRITE;
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cse->uio.uio_td = td;
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#endif
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cse->uio.uio_iov[0].iov_len = cop->len;
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if (cse->info.authsize)
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cse->uio.uio_iov[0].iov_len += cse->info.authsize;
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cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len,
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GFP_KERNEL);
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if (cse->uio.uio_iov[0].iov_base == NULL) {
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dprintk("%s: iov_base kmalloc(%d) failed\n", __FUNCTION__,
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(int)cse->uio.uio_iov[0].iov_len);
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return (ENOMEM);
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}
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crp = crypto_getreq((cse->info.blocksize != 0) + (cse->info.authsize != 0));
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if (crp == NULL) {
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dprintk("%s: ENOMEM\n", __FUNCTION__);
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error = ENOMEM;
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goto bail;
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}
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if (cse->info.authsize && cse->info.blocksize) {
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if (cop->op == COP_ENCRYPT) {
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crde = crp->crp_desc;
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crda = crde->crd_next;
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} else {
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crda = crp->crp_desc;
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crde = crda->crd_next;
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}
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} else if (cse->info.authsize) {
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crda = crp->crp_desc;
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} else if (cse->info.blocksize) {
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crde = crp->crp_desc;
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} else {
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dprintk("%s: bad request\n", __FUNCTION__);
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error = EINVAL;
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goto bail;
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}
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if ((error = copy_from_user(cse->uio.uio_iov[0].iov_base, cop->src,
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cop->len))) {
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dprintk("%s: bad copy\n", __FUNCTION__);
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goto bail;
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}
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if (crda) {
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crda->crd_skip = 0;
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crda->crd_len = cop->len;
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crda->crd_inject = cop->len;
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crda->crd_alg = cse->mac;
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crda->crd_key = cse->mackey;
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crda->crd_klen = cse->mackeylen * 8;
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}
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if (crde) {
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if (cop->op == COP_ENCRYPT)
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crde->crd_flags |= CRD_F_ENCRYPT;
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else
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crde->crd_flags &= ~CRD_F_ENCRYPT;
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crde->crd_len = cop->len;
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crde->crd_inject = 0;
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crde->crd_alg = cse->cipher;
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crde->crd_key = cse->key;
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crde->crd_klen = cse->keylen * 8;
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}
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crp->crp_ilen = cse->uio.uio_iov[0].iov_len;
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crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
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| (cop->flags & COP_F_BATCH);
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crp->crp_buf = (caddr_t)&cse->uio;
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crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
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crp->crp_sid = cse->sid;
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crp->crp_opaque = (void *)cse;
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if (cop->iv) {
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if (crde == NULL) {
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error = EINVAL;
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dprintk("%s no crde\n", __FUNCTION__);
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goto bail;
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}
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if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
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error = EINVAL;
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dprintk("%s arc4 with IV\n", __FUNCTION__);
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goto bail;
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}
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if ((error = copy_from_user(cse->tmp_iv, cop->iv,
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cse->info.blocksize))) {
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dprintk("%s bad iv copy\n", __FUNCTION__);
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goto bail;
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}
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memcpy(crde->crd_iv, cse->tmp_iv, cse->info.blocksize);
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crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
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crde->crd_skip = 0;
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} else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
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crde->crd_skip = 0;
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} else if (crde) {
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crde->crd_flags |= CRD_F_IV_PRESENT;
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crde->crd_skip = cse->info.blocksize;
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crde->crd_len -= cse->info.blocksize;
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}
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if (cop->mac && crda == NULL) {
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error = EINVAL;
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dprintk("%s no crda\n", __FUNCTION__);
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goto bail;
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}
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/*
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* Let the dispatch run unlocked, then, interlock against the
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* callback before checking if the operation completed and going
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* to sleep. This insures drivers don't inherit our lock which
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* results in a lock order reversal between crypto_dispatch forced
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* entry and the crypto_done callback into us.
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*/
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error = crypto_dispatch(crp);
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if (error) {
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dprintk("%s error in crypto_dispatch\n", __FUNCTION__);
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goto bail;
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}
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dprintk("%s about to WAIT\n", __FUNCTION__);
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/*
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* we really need to wait for driver to complete to maintain
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* state, luckily interrupts will be remembered
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*/
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do {
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error = wait_event_interruptible(crp->crp_waitq,
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((crp->crp_flags & CRYPTO_F_DONE) != 0));
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/*
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* we can't break out of this loop or we will leave behind
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* a huge mess, however, staying here means if your driver
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* is broken user applications can hang and not be killed.
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* The solution, fix your driver :-)
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*/
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if (error) {
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schedule();
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error = 0;
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}
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} while ((crp->crp_flags & CRYPTO_F_DONE) == 0);
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dprintk("%s finished WAITING error=%d\n", __FUNCTION__, error);
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if (crp->crp_etype != 0) {
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error = crp->crp_etype;
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dprintk("%s error in crp processing\n", __FUNCTION__);
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goto bail;
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}
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if (cse->error) {
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error = cse->error;
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dprintk("%s error in cse processing\n", __FUNCTION__);
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goto bail;
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}
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if (cop->dst && (error = copy_to_user(cop->dst,
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cse->uio.uio_iov[0].iov_base, cop->len))) {
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dprintk("%s bad dst copy\n", __FUNCTION__);
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goto bail;
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}
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if (cop->mac &&
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(error=copy_to_user(cop->mac,
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(caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
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cse->info.authsize))) {
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dprintk("%s bad mac copy\n", __FUNCTION__);
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goto bail;
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}
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bail:
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if (crp)
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crypto_freereq(crp);
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if (cse->uio.uio_iov[0].iov_base)
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kfree(cse->uio.uio_iov[0].iov_base);
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return (error);
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}
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static int
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cryptodev_cb(void *op)
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{
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struct cryptop *crp = (struct cryptop *) op;
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struct csession *cse = (struct csession *)crp->crp_opaque;
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int error;
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dprintk("%s()\n", __FUNCTION__);
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error = crp->crp_etype;
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if (error == EAGAIN) {
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crp->crp_flags &= ~CRYPTO_F_DONE;
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#ifdef NOTYET
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/*
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* DAVIDM I am fairly sure that we should turn this into a batch
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* request to stop bad karma/lockup, revisit
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*/
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crp->crp_flags |= CRYPTO_F_BATCH;
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#endif
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return crypto_dispatch(crp);
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}
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if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) {
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cse->error = error;
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wake_up_interruptible(&crp->crp_waitq);
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}
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return (0);
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}
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|
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static int
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cryptodevkey_cb(void *op)
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{
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struct cryptkop *krp = (struct cryptkop *) op;
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dprintk("%s()\n", __FUNCTION__);
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wake_up_interruptible(&krp->krp_waitq);
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return (0);
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}
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|
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static int
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cryptodev_key(struct crypt_kop *kop)
|
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{
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struct cryptkop *krp = NULL;
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int error = EINVAL;
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int in, out, size, i;
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|
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dprintk("%s()\n", __FUNCTION__);
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if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
|
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dprintk("%s params too big\n", __FUNCTION__);
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return (EFBIG);
|
|
}
|
|
|
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in = kop->crk_iparams;
|
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out = kop->crk_oparams;
|
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switch (kop->crk_op) {
|
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case CRK_MOD_EXP:
|
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if (in == 3 && out == 1)
|
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break;
|
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return (EINVAL);
|
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case CRK_MOD_EXP_CRT:
|
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if (in == 6 && out == 1)
|
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break;
|
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return (EINVAL);
|
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case CRK_DSA_SIGN:
|
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if (in == 5 && out == 2)
|
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break;
|
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return (EINVAL);
|
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case CRK_DSA_VERIFY:
|
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if (in == 7 && out == 0)
|
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break;
|
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return (EINVAL);
|
|
case CRK_DH_COMPUTE_KEY:
|
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if (in == 3 && out == 1)
|
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break;
|
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return (EINVAL);
|
|
default:
|
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return (EINVAL);
|
|
}
|
|
|
|
krp = (struct cryptkop *)kmalloc(sizeof *krp, GFP_KERNEL);
|
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if (!krp)
|
|
return (ENOMEM);
|
|
bzero(krp, sizeof *krp);
|
|
krp->krp_op = kop->crk_op;
|
|
krp->krp_status = kop->crk_status;
|
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krp->krp_iparams = kop->crk_iparams;
|
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krp->krp_oparams = kop->crk_oparams;
|
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krp->krp_crid = kop->crk_crid;
|
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krp->krp_status = 0;
|
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krp->krp_flags = CRYPTO_KF_CBIMM;
|
|
krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
|
|
init_waitqueue_head(&krp->krp_waitq);
|
|
|
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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++) {
|
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size = (krp->krp_param[i].crp_nbits + 7) / 8;
|
|
if (size == 0)
|
|
continue;
|
|
krp->krp_param[i].crp_p = (caddr_t) kmalloc(size, GFP_KERNEL);
|
|
if (i >= krp->krp_iparams)
|
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continue;
|
|
error = copy_from_user(krp->krp_param[i].crp_p,
|
|
kop->crk_param[i].crp_p, size);
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
|
|
error = crypto_kdispatch(krp);
|
|
if (error)
|
|
goto fail;
|
|
|
|
do {
|
|
error = wait_event_interruptible(krp->krp_waitq,
|
|
((krp->krp_flags & CRYPTO_KF_DONE) != 0));
|
|
/*
|
|
* we can't break out of this loop or we will leave behind
|
|
* a huge mess, however, staying here means if your driver
|
|
* is broken user applications can hang and not be killed.
|
|
* The solution, fix your driver :-)
|
|
*/
|
|
if (error) {
|
|
schedule();
|
|
error = 0;
|
|
}
|
|
} while ((krp->krp_flags & CRYPTO_KF_DONE) == 0);
|
|
|
|
dprintk("%s finished WAITING error=%d\n", __FUNCTION__, error);
|
|
|
|
kop->crk_crid = krp->krp_crid; /* device that did the work */
|
|
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 = copy_to_user(kop->crk_param[i].crp_p, krp->krp_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)
|
|
kfree(krp->krp_param[i].crp_p);
|
|
}
|
|
kfree(krp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
cryptodev_find(struct crypt_find_op *find)
|
|
{
|
|
device_t dev;
|
|
|
|
if (find->crid != -1) {
|
|
dev = crypto_find_device_byhid(find->crid);
|
|
if (dev == NULL)
|
|
return (ENOENT);
|
|
strlcpy(find->name, device_get_nameunit(dev),
|
|
sizeof(find->name));
|
|
} else {
|
|
find->crid = crypto_find_driver(find->name);
|
|
if (find->crid == -1)
|
|
return (ENOENT);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct csession *
|
|
csefind(struct fcrypt *fcr, u_int ses)
|
|
{
|
|
struct csession *cse;
|
|
|
|
dprintk("%s()\n", __FUNCTION__);
|
|
list_for_each_entry(cse, &fcr->csessions, list)
|
|
if (cse->ses == ses)
|
|
return (cse);
|
|
return (NULL);
|
|
}
|
|
|
|
static int
|
|
csedelete(struct fcrypt *fcr, struct csession *cse_del)
|
|
{
|
|
struct csession *cse;
|
|
|
|
dprintk("%s()\n", __FUNCTION__);
|
|
list_for_each_entry(cse, &fcr->csessions, list) {
|
|
if (cse == cse_del) {
|
|
list_del(&cse->list);
|
|
return (1);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static struct csession *
|
|
cseadd(struct fcrypt *fcr, struct csession *cse)
|
|
{
|
|
dprintk("%s()\n", __FUNCTION__);
|
|
list_add_tail(&cse->list, &fcr->csessions);
|
|
cse->ses = fcr->sesn++;
|
|
return (cse);
|
|
}
|
|
|
|
static struct csession *
|
|
csecreate(struct fcrypt *fcr, u_int64_t sid, struct cryptoini *crie,
|
|
struct cryptoini *cria, struct csession_info *info)
|
|
{
|
|
struct csession *cse;
|
|
|
|
dprintk("%s()\n", __FUNCTION__);
|
|
cse = (struct csession *) kmalloc(sizeof(struct csession), GFP_KERNEL);
|
|
if (cse == NULL)
|
|
return NULL;
|
|
memset(cse, 0, sizeof(struct csession));
|
|
|
|
INIT_LIST_HEAD(&cse->list);
|
|
init_waitqueue_head(&cse->waitq);
|
|
|
|
cse->key = crie->cri_key;
|
|
cse->keylen = crie->cri_klen/8;
|
|
cse->mackey = cria->cri_key;
|
|
cse->mackeylen = cria->cri_klen/8;
|
|
cse->sid = sid;
|
|
cse->cipher = crie->cri_alg;
|
|
cse->mac = cria->cri_alg;
|
|
cse->info = *info;
|
|
cseadd(fcr, cse);
|
|
return (cse);
|
|
}
|
|
|
|
static int
|
|
csefree(struct csession *cse)
|
|
{
|
|
int error;
|
|
|
|
dprintk("%s()\n", __FUNCTION__);
|
|
error = crypto_freesession(cse->sid);
|
|
if (cse->key)
|
|
kfree(cse->key);
|
|
if (cse->mackey)
|
|
kfree(cse->mackey);
|
|
kfree(cse);
|
|
return(error);
|
|
}
|
|
|
|
static int
|
|
cryptodev_ioctl(
|
|
struct inode *inode,
|
|
struct file *filp,
|
|
unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct cryptoini cria, crie;
|
|
struct fcrypt *fcr = filp->private_data;
|
|
struct csession *cse;
|
|
struct csession_info info;
|
|
struct session2_op sop;
|
|
struct crypt_op cop;
|
|
struct crypt_kop kop;
|
|
struct crypt_find_op fop;
|
|
u_int64_t sid;
|
|
u_int32_t ses = 0;
|
|
int feat, fd, error = 0, crid;
|
|
mm_segment_t fs;
|
|
|
|
dprintk("%s(cmd=%x arg=%lx)\n", __FUNCTION__, cmd, arg);
|
|
|
|
switch (cmd) {
|
|
|
|
case CRIOGET: {
|
|
dprintk("%s(CRIOGET)\n", __FUNCTION__);
|
|
fs = get_fs();
|
|
set_fs(get_ds());
|
|
for (fd = 0; fd < files_fdtable(current->files)->max_fds; fd++)
|
|
if (files_fdtable(current->files)->fd[fd] == filp)
|
|
break;
|
|
fd = sys_dup(fd);
|
|
set_fs(fs);
|
|
put_user(fd, (int *) arg);
|
|
return IS_ERR_VALUE(fd) ? fd : 0;
|
|
}
|
|
|
|
#define CIOCGSESSSTR (cmd == CIOCGSESSION ? "CIOCGSESSION" : "CIOCGSESSION2")
|
|
case CIOCGSESSION:
|
|
case CIOCGSESSION2:
|
|
dprintk("%s(%s)\n", __FUNCTION__, CIOCGSESSSTR);
|
|
memset(&crie, 0, sizeof(crie));
|
|
memset(&cria, 0, sizeof(cria));
|
|
memset(&info, 0, sizeof(info));
|
|
memset(&sop, 0, sizeof(sop));
|
|
|
|
if (copy_from_user(&sop, (void*)arg, (cmd == CIOCGSESSION) ?
|
|
sizeof(struct session_op) : sizeof(sop))) {
|
|
dprintk("%s(%s) - bad copy\n", __FUNCTION__, CIOCGSESSSTR);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
|
|
switch (sop.cipher) {
|
|
case 0:
|
|
dprintk("%s(%s) - no cipher\n", __FUNCTION__, CIOCGSESSSTR);
|
|
break;
|
|
case CRYPTO_NULL_CBC:
|
|
info.blocksize = NULL_BLOCK_LEN;
|
|
info.minkey = NULL_MIN_KEY_LEN;
|
|
info.maxkey = NULL_MAX_KEY_LEN;
|
|
break;
|
|
case CRYPTO_DES_CBC:
|
|
info.blocksize = DES_BLOCK_LEN;
|
|
info.minkey = DES_MIN_KEY_LEN;
|
|
info.maxkey = DES_MAX_KEY_LEN;
|
|
break;
|
|
case CRYPTO_3DES_CBC:
|
|
info.blocksize = DES3_BLOCK_LEN;
|
|
info.minkey = DES3_MIN_KEY_LEN;
|
|
info.maxkey = DES3_MAX_KEY_LEN;
|
|
break;
|
|
case CRYPTO_BLF_CBC:
|
|
info.blocksize = BLOWFISH_BLOCK_LEN;
|
|
info.minkey = BLOWFISH_MIN_KEY_LEN;
|
|
info.maxkey = BLOWFISH_MAX_KEY_LEN;
|
|
break;
|
|
case CRYPTO_CAST_CBC:
|
|
info.blocksize = CAST128_BLOCK_LEN;
|
|
info.minkey = CAST128_MIN_KEY_LEN;
|
|
info.maxkey = CAST128_MAX_KEY_LEN;
|
|
break;
|
|
case CRYPTO_SKIPJACK_CBC:
|
|
info.blocksize = SKIPJACK_BLOCK_LEN;
|
|
info.minkey = SKIPJACK_MIN_KEY_LEN;
|
|
info.maxkey = SKIPJACK_MAX_KEY_LEN;
|
|
break;
|
|
case CRYPTO_AES_CBC:
|
|
info.blocksize = AES_BLOCK_LEN;
|
|
info.minkey = AES_MIN_KEY_LEN;
|
|
info.maxkey = AES_MAX_KEY_LEN;
|
|
break;
|
|
case CRYPTO_ARC4:
|
|
info.blocksize = ARC4_BLOCK_LEN;
|
|
info.minkey = ARC4_MIN_KEY_LEN;
|
|
info.maxkey = ARC4_MAX_KEY_LEN;
|
|
break;
|
|
case CRYPTO_CAMELLIA_CBC:
|
|
info.blocksize = CAMELLIA_BLOCK_LEN;
|
|
info.minkey = CAMELLIA_MIN_KEY_LEN;
|
|
info.maxkey = CAMELLIA_MAX_KEY_LEN;
|
|
break;
|
|
default:
|
|
dprintk("%s(%s) - bad cipher\n", __FUNCTION__, CIOCGSESSSTR);
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
switch (sop.mac) {
|
|
case 0:
|
|
dprintk("%s(%s) - no mac\n", __FUNCTION__, CIOCGSESSSTR);
|
|
break;
|
|
case CRYPTO_NULL_HMAC:
|
|
info.authsize = NULL_HASH_LEN;
|
|
break;
|
|
case CRYPTO_MD5:
|
|
info.authsize = MD5_HASH_LEN;
|
|
break;
|
|
case CRYPTO_SHA1:
|
|
info.authsize = SHA1_HASH_LEN;
|
|
break;
|
|
case CRYPTO_SHA2_256:
|
|
info.authsize = SHA2_256_HASH_LEN;
|
|
break;
|
|
case CRYPTO_SHA2_384:
|
|
info.authsize = SHA2_384_HASH_LEN;
|
|
break;
|
|
case CRYPTO_SHA2_512:
|
|
info.authsize = SHA2_512_HASH_LEN;
|
|
break;
|
|
case CRYPTO_RIPEMD160:
|
|
info.authsize = RIPEMD160_HASH_LEN;
|
|
break;
|
|
case CRYPTO_MD5_HMAC:
|
|
info.authsize = MD5_HASH_LEN;
|
|
info.authkey = 16;
|
|
break;
|
|
case CRYPTO_SHA1_HMAC:
|
|
info.authsize = SHA1_HASH_LEN;
|
|
info.authkey = 20;
|
|
break;
|
|
case CRYPTO_SHA2_256_HMAC:
|
|
info.authsize = SHA2_256_HASH_LEN;
|
|
info.authkey = 32;
|
|
break;
|
|
case CRYPTO_SHA2_384_HMAC:
|
|
info.authsize = SHA2_384_HASH_LEN;
|
|
info.authkey = 48;
|
|
break;
|
|
case CRYPTO_SHA2_512_HMAC:
|
|
info.authsize = SHA2_512_HASH_LEN;
|
|
info.authkey = 64;
|
|
break;
|
|
case CRYPTO_RIPEMD160_HMAC:
|
|
info.authsize = RIPEMD160_HASH_LEN;
|
|
info.authkey = 20;
|
|
break;
|
|
default:
|
|
dprintk("%s(%s) - bad mac\n", __FUNCTION__, CIOCGSESSSTR);
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
if (info.blocksize) {
|
|
crie.cri_alg = sop.cipher;
|
|
crie.cri_klen = sop.keylen * 8;
|
|
if ((info.maxkey && sop.keylen > info.maxkey) ||
|
|
sop.keylen < info.minkey) {
|
|
dprintk("%s(%s) - bad key\n", __FUNCTION__, CIOCGSESSSTR);
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
crie.cri_key = (u_int8_t *) kmalloc(crie.cri_klen/8+1, GFP_KERNEL);
|
|
if (copy_from_user(crie.cri_key, sop.key,
|
|
crie.cri_klen/8)) {
|
|
dprintk("%s(%s) - bad copy\n", __FUNCTION__, CIOCGSESSSTR);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
if (info.authsize)
|
|
crie.cri_next = &cria;
|
|
}
|
|
|
|
if (info.authsize) {
|
|
cria.cri_alg = sop.mac;
|
|
cria.cri_klen = sop.mackeylen * 8;
|
|
if (info.authkey && sop.mackeylen != info.authkey) {
|
|
dprintk("%s(%s) - mackeylen %d != %d\n", __FUNCTION__,
|
|
CIOCGSESSSTR, sop.mackeylen, info.authkey);
|
|
error = EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
if (cria.cri_klen) {
|
|
cria.cri_key = (u_int8_t *) kmalloc(cria.cri_klen/8,GFP_KERNEL);
|
|
if (copy_from_user(cria.cri_key, sop.mackey,
|
|
cria.cri_klen / 8)) {
|
|
dprintk("%s(%s) - bad copy\n", __FUNCTION__, CIOCGSESSSTR);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* NB: CIOGSESSION2 has the crid */
|
|
if (cmd == CIOCGSESSION2) {
|
|
crid = sop.crid;
|
|
error = checkcrid(crid);
|
|
if (error) {
|
|
dprintk("%s(%s) - checkcrid %x\n", __FUNCTION__,
|
|
CIOCGSESSSTR, error);
|
|
goto bail;
|
|
}
|
|
} else {
|
|
/* allow either HW or SW to be used */
|
|
crid = CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
|
|
}
|
|
error = crypto_newsession(&sid, (info.blocksize ? &crie : &cria), crid);
|
|
if (error) {
|
|
dprintk("%s(%s) - newsession %d\n",__FUNCTION__,CIOCGSESSSTR,error);
|
|
goto bail;
|
|
}
|
|
|
|
cse = csecreate(fcr, sid, &crie, &cria, &info);
|
|
if (cse == NULL) {
|
|
crypto_freesession(sid);
|
|
error = EINVAL;
|
|
dprintk("%s(%s) - csecreate failed\n", __FUNCTION__, CIOCGSESSSTR);
|
|
goto bail;
|
|
}
|
|
sop.ses = cse->ses;
|
|
|
|
if (cmd == CIOCGSESSION2) {
|
|
/* return hardware/driver id */
|
|
sop.crid = CRYPTO_SESID2HID(cse->sid);
|
|
}
|
|
|
|
if (copy_to_user((void*)arg, &sop, (cmd == CIOCGSESSION) ?
|
|
sizeof(struct session_op) : sizeof(sop))) {
|
|
dprintk("%s(%s) - bad copy\n", __FUNCTION__, CIOCGSESSSTR);
|
|
error = EFAULT;
|
|
}
|
|
bail:
|
|
if (error) {
|
|
dprintk("%s(%s) - bail %d\n", __FUNCTION__, CIOCGSESSSTR, error);
|
|
if (crie.cri_key)
|
|
kfree(crie.cri_key);
|
|
if (cria.cri_key)
|
|
kfree(cria.cri_key);
|
|
}
|
|
break;
|
|
case CIOCFSESSION:
|
|
dprintk("%s(CIOCFSESSION)\n", __FUNCTION__);
|
|
get_user(ses, (uint32_t*)arg);
|
|
cse = csefind(fcr, ses);
|
|
if (cse == NULL) {
|
|
error = EINVAL;
|
|
dprintk("%s(CIOCFSESSION) - Fail %d\n", __FUNCTION__, error);
|
|
break;
|
|
}
|
|
csedelete(fcr, cse);
|
|
error = csefree(cse);
|
|
break;
|
|
case CIOCCRYPT:
|
|
dprintk("%s(CIOCCRYPT)\n", __FUNCTION__);
|
|
if(copy_from_user(&cop, (void*)arg, sizeof(cop))) {
|
|
dprintk("%s(CIOCCRYPT) - bad copy\n", __FUNCTION__);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
cse = csefind(fcr, cop.ses);
|
|
if (cse == NULL) {
|
|
error = EINVAL;
|
|
dprintk("%s(CIOCCRYPT) - Fail %d\n", __FUNCTION__, error);
|
|
break;
|
|
}
|
|
error = cryptodev_op(cse, &cop);
|
|
if(copy_to_user((void*)arg, &cop, sizeof(cop))) {
|
|
dprintk("%s(CIOCCRYPT) - bad return copy\n", __FUNCTION__);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
break;
|
|
case CIOCKEY:
|
|
case CIOCKEY2:
|
|
dprintk("%s(CIOCKEY)\n", __FUNCTION__);
|
|
if (!crypto_userasymcrypto)
|
|
return (EPERM); /* XXX compat? */
|
|
if(copy_from_user(&kop, (void*)arg, sizeof(kop))) {
|
|
dprintk("%s(CIOCKEY) - bad copy\n", __FUNCTION__);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
if (cmd == CIOCKEY) {
|
|
/* NB: crypto core enforces s/w driver use */
|
|
kop.crk_crid =
|
|
CRYPTOCAP_F_HARDWARE | CRYPTOCAP_F_SOFTWARE;
|
|
}
|
|
error = cryptodev_key(&kop);
|
|
if(copy_to_user((void*)arg, &kop, sizeof(kop))) {
|
|
dprintk("%s(CIOCGKEY) - bad return copy\n", __FUNCTION__);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
break;
|
|
case CIOCASYMFEAT:
|
|
dprintk("%s(CIOCASYMFEAT)\n", __FUNCTION__);
|
|
if (!crypto_userasymcrypto) {
|
|
/*
|
|
* NB: if user asym crypto operations are
|
|
* not permitted return "no algorithms"
|
|
* so well-behaved applications will just
|
|
* fallback to doing them in software.
|
|
*/
|
|
feat = 0;
|
|
} else
|
|
error = crypto_getfeat(&feat);
|
|
if (!error) {
|
|
error = copy_to_user((void*)arg, &feat, sizeof(feat));
|
|
}
|
|
break;
|
|
case CIOCFINDDEV:
|
|
if (copy_from_user(&fop, (void*)arg, sizeof(fop))) {
|
|
dprintk("%s(CIOCFINDDEV) - bad copy\n", __FUNCTION__);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
error = cryptodev_find(&fop);
|
|
if (copy_to_user((void*)arg, &fop, sizeof(fop))) {
|
|
dprintk("%s(CIOCFINDDEV) - bad return copy\n", __FUNCTION__);
|
|
error = EFAULT;
|
|
goto bail;
|
|
}
|
|
break;
|
|
default:
|
|
dprintk("%s(unknown ioctl 0x%x)\n", __FUNCTION__, cmd);
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
return(-error);
|
|
}
|
|
|
|
#ifdef HAVE_UNLOCKED_IOCTL
|
|
static long
|
|
cryptodev_unlocked_ioctl(
|
|
struct file *filp,
|
|
unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
return cryptodev_ioctl(NULL, filp, cmd, arg);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
cryptodev_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct fcrypt *fcr;
|
|
|
|
dprintk("%s()\n", __FUNCTION__);
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,35)
|
|
/*
|
|
* on 2.6.35 private_data points to a miscdevice structure, we override
|
|
* it, which is currently safe to do.
|
|
*/
|
|
if (filp->private_data) {
|
|
printk("cryptodev: Private data already exists - %p!\n", filp->private_data);
|
|
return(-ENODEV);
|
|
}
|
|
#endif
|
|
|
|
fcr = kmalloc(sizeof(*fcr), GFP_KERNEL);
|
|
if (!fcr) {
|
|
dprintk("%s() - malloc failed\n", __FUNCTION__);
|
|
return(-ENOMEM);
|
|
}
|
|
memset(fcr, 0, sizeof(*fcr));
|
|
|
|
INIT_LIST_HEAD(&fcr->csessions);
|
|
filp->private_data = fcr;
|
|
return(0);
|
|
}
|
|
|
|
static int
|
|
cryptodev_release(struct inode *inode, struct file *filp)
|
|
{
|
|
struct fcrypt *fcr = filp->private_data;
|
|
struct csession *cse, *tmp;
|
|
|
|
dprintk("%s()\n", __FUNCTION__);
|
|
if (!filp) {
|
|
printk("cryptodev: No private data on release\n");
|
|
return(0);
|
|
}
|
|
|
|
list_for_each_entry_safe(cse, tmp, &fcr->csessions, list) {
|
|
list_del(&cse->list);
|
|
(void)csefree(cse);
|
|
}
|
|
filp->private_data = NULL;
|
|
kfree(fcr);
|
|
return(0);
|
|
}
|
|
|
|
static struct file_operations cryptodev_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = cryptodev_open,
|
|
.release = cryptodev_release,
|
|
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36)
|
|
.ioctl = cryptodev_ioctl,
|
|
#endif
|
|
#ifdef HAVE_UNLOCKED_IOCTL
|
|
.unlocked_ioctl = cryptodev_unlocked_ioctl,
|
|
#endif
|
|
};
|
|
|
|
static struct miscdevice cryptodev = {
|
|
.minor = CRYPTODEV_MINOR,
|
|
.name = "crypto",
|
|
.fops = &cryptodev_fops,
|
|
};
|
|
|
|
static int __init
|
|
cryptodev_init(void)
|
|
{
|
|
int rc;
|
|
|
|
dprintk("%s(%p)\n", __FUNCTION__, cryptodev_init);
|
|
rc = misc_register(&cryptodev);
|
|
if (rc) {
|
|
printk(KERN_ERR "cryptodev: registration of /dev/crypto failed\n");
|
|
return(rc);
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
static void __exit
|
|
cryptodev_exit(void)
|
|
{
|
|
dprintk("%s()\n", __FUNCTION__);
|
|
misc_deregister(&cryptodev);
|
|
}
|
|
|
|
module_init(cryptodev_init);
|
|
module_exit(cryptodev_exit);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_AUTHOR("David McCullough <david_mccullough@mcafee.com>");
|
|
MODULE_DESCRIPTION("Cryptodev (user interface to OCF)");
|