--- /dev/null
+/* $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)");
projects / 15.05 / openwrt.git / blobdiff