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openwrt-xburst/target/linux/generic/files/crypto/ocf/cryptodev.c
nbd c5552ad039 rename target/linux/generic-2.6 to generic 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21952 3c298f89-4303-0410-b956-a3cf2f4a3e73
2010-06-26 20:42:58 +00:00

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26 KiB
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/* $OpenBSD: cryptodev.c,v 1.52 2002/06/19 07:22:46 deraadt Exp $ */
/*-
* Linux port done by David McCullough <david_mccullough@mcafee.com>
* Copyright (C) 2006-2010 David McCullough
* Copyright (C) 2004-2005 Intel Corporation.
* The license and original author are listed below.
*
* Copyright (c) 2001 Theo de Raadt
* Copyright (c) 2002-2006 Sam Leffler, Errno Consulting
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Effort sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F30602-01-2-0537.
*
__FBSDID("$FreeBSD: src/sys/opencrypto/cryptodev.c,v 1.34 2007/05/09 19:37:02 gnn Exp $");
*/
#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
#include <linux/types.h>
#include <linux/time.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/unistd.h>
#include <linux/module.h>
#include <linux/wait.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/dcache.h>
#include <linux/file.h>
#include <linux/mount.h>
#include <linux/miscdevice.h>
#include <linux/version.h>
#include <asm/uaccess.h>
#include <cryptodev.h>
#include <uio.h>
extern asmlinkage long sys_dup(unsigned int fildes);
#define debug cryptodev_debug
int cryptodev_debug = 0;
module_param(cryptodev_debug, int, 0644);
MODULE_PARM_DESC(cryptodev_debug, "Enable cryptodev debug");
struct csession_info {
u_int16_t blocksize;
u_int16_t minkey, maxkey;
u_int16_t keysize;
/* u_int16_t hashsize; */
u_int16_t authsize;
u_int16_t authkey;
/* u_int16_t ctxsize; */
};
struct csession {
struct list_head list;
u_int64_t sid;
u_int32_t ses;
wait_queue_head_t waitq;
u_int32_t cipher;
u_int32_t mac;
caddr_t key;
int keylen;
u_char tmp_iv[EALG_MAX_BLOCK_LEN];
caddr_t mackey;
int mackeylen;
struct csession_info info;
struct iovec iovec;
struct uio uio;
int error;
};
struct fcrypt {
struct list_head csessions;
int sesn;
};
static struct csession *csefind(struct fcrypt *, u_int);
static int csedelete(struct fcrypt *, struct csession *);
static struct csession *cseadd(struct fcrypt *, struct csession *);
static struct csession *csecreate(struct fcrypt *, u_int64_t,
struct cryptoini *crie, struct cryptoini *cria, struct csession_info *);
static int csefree(struct csession *);
static int cryptodev_op(struct csession *, struct crypt_op *);
static int cryptodev_key(struct crypt_kop *);
static int cryptodev_find(struct crypt_find_op *);
static int cryptodev_cb(void *);
static int cryptodev_open(struct inode *inode, struct file *filp);
/*
* Check a crypto identifier to see if it requested
* a valid crid and it's capabilities match.
*/
static int
checkcrid(int crid)
{
int hid = crid & ~(CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE);
int typ = crid & (CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE);
int caps = 0;
/* if the user hasn't selected a driver, then just call newsession */
if (hid == 0 && typ != 0)
return 0;
caps = crypto_getcaps(hid);
/* didn't find anything with capabilities */
if (caps == 0) {
dprintk("%s: hid=%x typ=%x not matched\n", __FUNCTION__, hid, typ);
return EINVAL;
}
/* the user didn't specify SW or HW, so the driver is ok */
if (typ == 0)
return 0;
/* if the type specified didn't match */
if (typ != (caps & (CRYPTOCAP_F_SOFTWARE | CRYPTOCAP_F_HARDWARE))) {
dprintk("%s: hid=%x typ=%x caps=%x not matched\n", __FUNCTION__,
hid, typ, caps);
return EINVAL;
}
return 0;
}
static int
cryptodev_op(struct csession *cse, struct crypt_op *cop)
{
struct cryptop *crp = NULL;
struct cryptodesc *crde = NULL, *crda = NULL;
int error = 0;
dprintk("%s()\n", __FUNCTION__);
if (cop->len > CRYPTO_MAX_DATA_LEN) {
dprintk("%s: %d > %d\n", __FUNCTION__, cop->len, CRYPTO_MAX_DATA_LEN);
return (E2BIG);
}
if (cse->info.blocksize && (cop->len % cse->info.blocksize) != 0) {
dprintk("%s: blocksize=%d len=%d\n", __FUNCTION__, cse->info.blocksize,
cop->len);
return (EINVAL);
}
cse->uio.uio_iov = &cse->iovec;
cse->uio.uio_iovcnt = 1;
cse->uio.uio_offset = 0;
#if 0
cse->uio.uio_resid = cop->len;
cse->uio.uio_segflg = UIO_SYSSPACE;
cse->uio.uio_rw = UIO_WRITE;
cse->uio.uio_td = td;
#endif
cse->uio.uio_iov[0].iov_len = cop->len;
if (cse->info.authsize)
cse->uio.uio_iov[0].iov_len += cse->info.authsize;
cse->uio.uio_iov[0].iov_base = kmalloc(cse->uio.uio_iov[0].iov_len,
GFP_KERNEL);
if (cse->uio.uio_iov[0].iov_base == NULL) {
dprintk("%s: iov_base kmalloc(%d) failed\n", __FUNCTION__,
(int)cse->uio.uio_iov[0].iov_len);
return (ENOMEM);
}
crp = crypto_getreq((cse->info.blocksize != 0) + (cse->info.authsize != 0));
if (crp == NULL) {
dprintk("%s: ENOMEM\n", __FUNCTION__);
error = ENOMEM;
goto bail;
}
if (cse->info.authsize && cse->info.blocksize) {
if (cop->op == COP_ENCRYPT) {
crde = crp->crp_desc;
crda = crde->crd_next;
} else {
crda = crp->crp_desc;
crde = crda->crd_next;
}
} else if (cse->info.authsize) {
crda = crp->crp_desc;
} else if (cse->info.blocksize) {
crde = crp->crp_desc;
} else {
dprintk("%s: bad request\n", __FUNCTION__);
error = EINVAL;
goto bail;
}
if ((error = copy_from_user(cse->uio.uio_iov[0].iov_base, cop->src,
cop->len))) {
dprintk("%s: bad copy\n", __FUNCTION__);
goto bail;
}
if (crda) {
crda->crd_skip = 0;
crda->crd_len = cop->len;
crda->crd_inject = cop->len;
crda->crd_alg = cse->mac;
crda->crd_key = cse->mackey;
crda->crd_klen = cse->mackeylen * 8;
}
if (crde) {
if (cop->op == COP_ENCRYPT)
crde->crd_flags |= CRD_F_ENCRYPT;
else
crde->crd_flags &= ~CRD_F_ENCRYPT;
crde->crd_len = cop->len;
crde->crd_inject = 0;
crde->crd_alg = cse->cipher;
crde->crd_key = cse->key;
crde->crd_klen = cse->keylen * 8;
}
crp->crp_ilen = cse->uio.uio_iov[0].iov_len;
crp->crp_flags = CRYPTO_F_IOV | CRYPTO_F_CBIMM
| (cop->flags & COP_F_BATCH);
crp->crp_buf = (caddr_t)&cse->uio;
crp->crp_callback = (int (*) (struct cryptop *)) cryptodev_cb;
crp->crp_sid = cse->sid;
crp->crp_opaque = (void *)cse;
if (cop->iv) {
if (crde == NULL) {
error = EINVAL;
dprintk("%s no crde\n", __FUNCTION__);
goto bail;
}
if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
error = EINVAL;
dprintk("%s arc4 with IV\n", __FUNCTION__);
goto bail;
}
if ((error = copy_from_user(cse->tmp_iv, cop->iv,
cse->info.blocksize))) {
dprintk("%s bad iv copy\n", __FUNCTION__);
goto bail;
}
memcpy(crde->crd_iv, cse->tmp_iv, cse->info.blocksize);
crde->crd_flags |= CRD_F_IV_EXPLICIT | CRD_F_IV_PRESENT;
crde->crd_skip = 0;
} else if (cse->cipher == CRYPTO_ARC4) { /* XXX use flag? */
crde->crd_skip = 0;
} else if (crde) {
crde->crd_flags |= CRD_F_IV_PRESENT;
crde->crd_skip = cse->info.blocksize;
crde->crd_len -= cse->info.blocksize;
}
if (cop->mac && crda == NULL) {
error = EINVAL;
dprintk("%s no crda\n", __FUNCTION__);
goto bail;
}
/*
* 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) {
dprintk("%s error in crypto_dispatch\n", __FUNCTION__);
goto bail;
}
dprintk("%s about to WAIT\n", __FUNCTION__);
/*
* we really need to wait for driver to complete to maintain
* state, luckily interrupts will be remembered
*/
do {
error = wait_event_interruptible(crp->crp_waitq,
((crp->crp_flags & CRYPTO_F_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 ((crp->crp_flags & CRYPTO_F_DONE) == 0);
dprintk("%s finished WAITING error=%d\n", __FUNCTION__, error);
if (crp->crp_etype != 0) {
error = crp->crp_etype;
dprintk("%s error in crp processing\n", __FUNCTION__);
goto bail;
}
if (cse->error) {
error = cse->error;
dprintk("%s error in cse processing\n", __FUNCTION__);
goto bail;
}
if (cop->dst && (error = copy_to_user(cop->dst,
cse->uio.uio_iov[0].iov_base, cop->len))) {
dprintk("%s bad dst copy\n", __FUNCTION__);
goto bail;
}
if (cop->mac &&
(error=copy_to_user(cop->mac,
(caddr_t)cse->uio.uio_iov[0].iov_base + cop->len,
cse->info.authsize))) {
dprintk("%s bad mac copy\n", __FUNCTION__);
goto bail;
}
bail:
if (crp)
crypto_freereq(crp);
if (cse->uio.uio_iov[0].iov_base)
kfree(cse->uio.uio_iov[0].iov_base);
return (error);
}
static int
cryptodev_cb(void *op)
{
struct cryptop *crp = (struct cryptop *) op;
struct csession *cse = (struct csession *)crp->crp_opaque;
int error;
dprintk("%s()\n", __FUNCTION__);
error = crp->crp_etype;
if (error == EAGAIN) {
crp->crp_flags &= ~CRYPTO_F_DONE;
#ifdef NOTYET
/*
* DAVIDM I am fairly sure that we should turn this into a batch
* request to stop bad karma/lockup, revisit
*/
crp->crp_flags |= CRYPTO_F_BATCH;
#endif
return crypto_dispatch(crp);
}
if (error != 0 || (crp->crp_flags & CRYPTO_F_DONE)) {
cse->error = error;
wake_up_interruptible(&crp->crp_waitq);
}
return (0);
}
static int
cryptodevkey_cb(void *op)
{
struct cryptkop *krp = (struct cryptkop *) op;
dprintk("%s()\n", __FUNCTION__);
wake_up_interruptible(&krp->krp_waitq);
return (0);
}
static int
cryptodev_key(struct crypt_kop *kop)
{
struct cryptkop *krp = NULL;
int error = EINVAL;
int in, out, size, i;
dprintk("%s()\n", __FUNCTION__);
if (kop->crk_iparams + kop->crk_oparams > CRK_MAXPARAM) {
dprintk("%s params too big\n", __FUNCTION__);
return (EFBIG);
}
in = kop->crk_iparams;
out = kop->crk_oparams;
switch (kop->crk_op) {
case CRK_MOD_EXP:
if (in == 3 && out == 1)
break;
return (EINVAL);
case CRK_MOD_EXP_CRT:
if (in == 6 && out == 1)
break;
return (EINVAL);
case CRK_DSA_SIGN:
if (in == 5 && out == 2)
break;
return (EINVAL);
case CRK_DSA_VERIFY:
if (in == 7 && out == 0)
break;
return (EINVAL);
case CRK_DH_COMPUTE_KEY:
if (in == 3 && out == 1)
break;
return (EINVAL);
default:
return (EINVAL);
}
krp = (struct cryptkop *)kmalloc(sizeof *krp, GFP_KERNEL);
if (!krp)
return (ENOMEM);
bzero(krp, sizeof *krp);
krp->krp_op = kop->crk_op;
krp->krp_status = kop->crk_status;
krp->krp_iparams = kop->crk_iparams;
krp->krp_oparams = kop->crk_oparams;
krp->krp_crid = kop->crk_crid;
krp->krp_status = 0;
krp->krp_flags = CRYPTO_KF_CBIMM;
krp->krp_callback = (int (*) (struct cryptkop *)) cryptodevkey_cb;
init_waitqueue_head(&krp->krp_waitq);
for (i = 0; i < CRK_MAXPARAM; i++)
krp->krp_param[i].crp_nbits = kop->crk_param[i].crp_nbits;
for (i = 0; i < krp->krp_iparams + krp->krp_oparams; i++) {
size = (krp->krp_param[i].crp_nbits + 7) / 8;
if (size == 0)
continue;
krp->krp_param[i].crp_p = (caddr_t) kmalloc(size, GFP_KERNEL);
if (i >= krp->krp_iparams)
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 (filp->private_data) {
printk("cryptodev: Private data already exists !\n");
return(0);
}
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,
.ioctl = cryptodev_ioctl,
#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("BSD");
MODULE_AUTHOR("David McCullough <david_mccullough@mcafee.com>");
MODULE_DESCRIPTION("Cryptodev (user interface to OCF)");
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