+++ /dev/null
-/*
- * An OCF module for determining the cost of crypto versus the cost of
- * IPSec processing outside of OCF. This modules gives us the effect of
- * zero cost encryption, of course you will need to run it at both ends
- * since it does no crypto at all.
- *
- * Written by David McCullough <david_mccullough@mcafee.com>
- * Copyright (C) 2006-2010 David McCullough
- *
- * LICENSE TERMS
- *
- * The free distribution and use of this software in both source and binary
- * form is allowed (with or without changes) provided that:
- *
- * 1. distributions of this source code include the above copyright
- * notice, this list of conditions and the following disclaimer;
- *
- * 2. distributions in binary form include the above copyright
- * notice, this list of conditions and the following disclaimer
- * in the documentation and/or other associated materials;
- *
- * 3. the copyright holder's name is not used to endorse products
- * built using this software without specific written permission.
- *
- * ALTERNATIVELY, provided that this notice is retained in full, this product
- * may be distributed under the terms of the GNU General Public License (GPL),
- * in which case the provisions of the GPL apply INSTEAD OF those given above.
- *
- * DISCLAIMER
- *
- * This software is provided 'as is' with no explicit or implied warranties
- * in respect of its properties, including, but not limited to, correctness
- * and/or fitness for purpose.
- */
-
-#ifndef AUTOCONF_INCLUDED
-#include <linux/config.h>
-#endif
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/wait.h>
-#include <linux/crypto.h>
-#include <linux/interrupt.h>
-
-#include <cryptodev.h>
-#include <uio.h>
-
-static int32_t null_id = -1;
-static u_int32_t null_sesnum = 0;
-
-static int null_process(device_t, struct cryptop *, int);
-static int null_newsession(device_t, u_int32_t *, struct cryptoini *);
-static int null_freesession(device_t, u_int64_t);
-
-#define debug ocfnull_debug
-int ocfnull_debug = 0;
-module_param(ocfnull_debug, int, 0644);
-MODULE_PARM_DESC(ocfnull_debug, "Enable debug");
-
-/*
- * dummy device structure
- */
-
-static struct {
- softc_device_decl sc_dev;
-} nulldev;
-
-static device_method_t null_methods = {
- /* crypto device methods */
- DEVMETHOD(cryptodev_newsession, null_newsession),
- DEVMETHOD(cryptodev_freesession,null_freesession),
- DEVMETHOD(cryptodev_process, null_process),
-};
-
-/*
- * Generate a new software session.
- */
-static int
-null_newsession(device_t arg, u_int32_t *sid, struct cryptoini *cri)
-{
- dprintk("%s()\n", __FUNCTION__);
- if (sid == NULL || cri == NULL) {
- dprintk("%s,%d - EINVAL\n", __FILE__, __LINE__);
- return EINVAL;
- }
-
- if (null_sesnum == 0)
- null_sesnum++;
- *sid = null_sesnum++;
- return 0;
-}
-
-
-/*
- * Free a session.
- */
-static int
-null_freesession(device_t arg, u_int64_t tid)
-{
- u_int32_t sid = CRYPTO_SESID2LID(tid);
-
- dprintk("%s()\n", __FUNCTION__);
- if (sid > null_sesnum) {
- dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
- return EINVAL;
- }
-
- /* Silently accept and return */
- if (sid == 0)
- return 0;
- return 0;
-}
-
-
-/*
- * Process a request.
- */
-static int
-null_process(device_t arg, struct cryptop *crp, int hint)
-{
- unsigned int lid;
-
- dprintk("%s()\n", __FUNCTION__);
-
- /* Sanity check */
- if (crp == NULL) {
- dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
- return EINVAL;
- }
-
- crp->crp_etype = 0;
-
- if (crp->crp_desc == NULL || crp->crp_buf == NULL) {
- dprintk("%s,%d: EINVAL\n", __FILE__, __LINE__);
- crp->crp_etype = EINVAL;
- goto done;
- }
-
- /*
- * find the session we are using
- */
-
- lid = crp->crp_sid & 0xffffffff;
- if (lid >= null_sesnum || lid == 0) {
- crp->crp_etype = ENOENT;
- dprintk("%s,%d: ENOENT\n", __FILE__, __LINE__);
- goto done;
- }
-
-done:
- crypto_done(crp);
- return 0;
-}
-
-
-/*
- * our driver startup and shutdown routines
- */
-
-static int
-null_init(void)
-{
- dprintk("%s(%p)\n", __FUNCTION__, null_init);
-
- memset(&nulldev, 0, sizeof(nulldev));
- softc_device_init(&nulldev, "ocfnull", 0, null_methods);
-
- null_id = crypto_get_driverid(softc_get_device(&nulldev),
- CRYPTOCAP_F_HARDWARE);
- if (null_id < 0)
- panic("ocfnull: crypto device cannot initialize!");
-
-#define REGISTER(alg) \
- crypto_register(null_id,alg,0,0)
- REGISTER(CRYPTO_DES_CBC);
- REGISTER(CRYPTO_3DES_CBC);
- REGISTER(CRYPTO_RIJNDAEL128_CBC);
- REGISTER(CRYPTO_MD5);
- REGISTER(CRYPTO_SHA1);
- REGISTER(CRYPTO_MD5_HMAC);
- REGISTER(CRYPTO_SHA1_HMAC);
-#undef REGISTER
-
- return 0;
-}
-
-static void
-null_exit(void)
-{
- dprintk("%s()\n", __FUNCTION__);
- crypto_unregister_all(null_id);
- null_id = -1;
-}
-
-module_init(null_init);
-module_exit(null_exit);
-
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_AUTHOR("David McCullough <david_mccullough@mcafee.com>");
-MODULE_DESCRIPTION("ocfnull - claims a lot but does nothing");
projects / openwrt / svn-archive / archive.git / blobdiff