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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-06-26 20:42:58 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-06-26 20:42:58 +0000
commitc5552ad03973839d83d32d7108f20c00f192633b (patch)
treede32e4def600e56134cd085a7447cb6620542078 /target/linux/generic-2.6/files/crypto/ocf/random.c
parent7ec88f88f4c65a22b3b7e32ef87cb42dcb32a6fb (diff)
rename target/linux/generic-2.6 to generic
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21952 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic-2.6/files/crypto/ocf/random.c')
-rw-r--r--target/linux/generic-2.6/files/crypto/ocf/random.c322
1 files changed, 0 insertions, 322 deletions
diff --git a/target/linux/generic-2.6/files/crypto/ocf/random.c b/target/linux/generic-2.6/files/crypto/ocf/random.c
deleted file mode 100644
index 38dad13d77..0000000000
--- a/target/linux/generic-2.6/files/crypto/ocf/random.c
+++ /dev/null
@@ -1,322 +0,0 @@
-/*
- * A system independant way of adding entropy to the kernels pool
- * this way the drivers can focus on the real work and we can take
- * care of pushing it to the appropriate place in the kernel.
- *
- * This should be fast and callable from timers/interrupts
- *
- * Written by David McCullough <david_mccullough@mcafee.com>
- * Copyright (C) 2006-2010 David McCullough
- * Copyright (C) 2004-2005 Intel Corporation.
- *
- * 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/wait.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/version.h>
-#include <linux/unistd.h>
-#include <linux/poll.h>
-#include <linux/random.h>
-#include <cryptodev.h>
-
-#ifdef CONFIG_OCF_FIPS
-#include "rndtest.h"
-#endif
-
-#ifndef HAS_RANDOM_INPUT_WAIT
-#error "Please do not enable OCF_RANDOMHARVEST unless you have applied patches"
-#endif
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
-#include <linux/sched.h>
-#define kill_proc(p,s,v) send_sig(s,find_task_by_vpid(p),0)
-#endif
-
-/*
- * a hack to access the debug levels from the crypto driver
- */
-extern int crypto_debug;
-#define debug crypto_debug
-
-/*
- * a list of all registered random providers
- */
-static LIST_HEAD(random_ops);
-static int started = 0;
-static int initted = 0;
-
-struct random_op {
- struct list_head random_list;
- u_int32_t driverid;
- int (*read_random)(void *arg, u_int32_t *buf, int len);
- void *arg;
-};
-
-static int random_proc(void *arg);
-
-static pid_t randomproc = (pid_t) -1;
-static spinlock_t random_lock;
-
-/*
- * just init the spin locks
- */
-static int
-crypto_random_init(void)
-{
- spin_lock_init(&random_lock);
- initted = 1;
- return(0);
-}
-
-/*
- * Add the given random reader to our list (if not present)
- * and start the thread (if not already started)
- *
- * we have to assume that driver id is ok for now
- */
-int
-crypto_rregister(
- u_int32_t driverid,
- int (*read_random)(void *arg, u_int32_t *buf, int len),
- void *arg)
-{
- unsigned long flags;
- int ret = 0;
- struct random_op *rops, *tmp;
-
- dprintk("%s,%d: %s(0x%x, %p, %p)\n", __FILE__, __LINE__,
- __FUNCTION__, driverid, read_random, arg);
-
- if (!initted)
- crypto_random_init();
-
-#if 0
- struct cryptocap *cap;
-
- cap = crypto_checkdriver(driverid);
- if (!cap)
- return EINVAL;
-#endif
-
- list_for_each_entry_safe(rops, tmp, &random_ops, random_list) {
- if (rops->driverid == driverid && rops->read_random == read_random)
- return EEXIST;
- }
-
- rops = (struct random_op *) kmalloc(sizeof(*rops), GFP_KERNEL);
- if (!rops)
- return ENOMEM;
-
- rops->driverid = driverid;
- rops->read_random = read_random;
- rops->arg = arg;
-
- spin_lock_irqsave(&random_lock, flags);
- list_add_tail(&rops->random_list, &random_ops);
- if (!started) {
- randomproc = kernel_thread(random_proc, NULL, CLONE_FS|CLONE_FILES);
- if (randomproc < 0) {
- ret = randomproc;
- printk("crypto: crypto_rregister cannot start random thread; "
- "error %d", ret);
- } else
- started = 1;
- }
- spin_unlock_irqrestore(&random_lock, flags);
-
- return ret;
-}
-EXPORT_SYMBOL(crypto_rregister);
-
-int
-crypto_runregister_all(u_int32_t driverid)
-{
- struct random_op *rops, *tmp;
- unsigned long flags;
-
- dprintk("%s,%d: %s(0x%x)\n", __FILE__, __LINE__, __FUNCTION__, driverid);
-
- list_for_each_entry_safe(rops, tmp, &random_ops, random_list) {
- if (rops->driverid == driverid) {
- list_del(&rops->random_list);
- kfree(rops);
- }
- }
-
- spin_lock_irqsave(&random_lock, flags);
- if (list_empty(&random_ops) && started)
- kill_proc(randomproc, SIGKILL, 1);
- spin_unlock_irqrestore(&random_lock, flags);
- return(0);
-}
-EXPORT_SYMBOL(crypto_runregister_all);
-
-/*
- * while we can add entropy to random.c continue to read random data from
- * the drivers and push it to random.
- */
-static int
-random_proc(void *arg)
-{
- int n;
- int wantcnt;
- int bufcnt = 0;
- int retval = 0;
- int *buf = NULL;
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
- daemonize();
- spin_lock_irq(&current->sigmask_lock);
- sigemptyset(&current->blocked);
- recalc_sigpending(current);
- spin_unlock_irq(&current->sigmask_lock);
- sprintf(current->comm, "ocf-random");
-#else
- daemonize("ocf-random");
- allow_signal(SIGKILL);
-#endif
-
- (void) get_fs();
- set_fs(get_ds());
-
-#ifdef CONFIG_OCF_FIPS
-#define NUM_INT (RNDTEST_NBYTES/sizeof(int))
-#else
-#define NUM_INT 32
-#endif
-
- /*
- * some devices can transferr their RNG data direct into memory,
- * so make sure it is device friendly
- */
- buf = kmalloc(NUM_INT * sizeof(int), GFP_DMA);
- if (NULL == buf) {
- printk("crypto: RNG could not allocate memory\n");
- retval = -ENOMEM;
- goto bad_alloc;
- }
-
- wantcnt = NUM_INT; /* start by adding some entropy */
-
- /*
- * its possible due to errors or driver removal that we no longer
- * have anything to do, if so exit or we will consume all the CPU
- * doing nothing
- */
- while (!list_empty(&random_ops)) {
- struct random_op *rops, *tmp;
-
-#ifdef CONFIG_OCF_FIPS
- if (wantcnt)
- wantcnt = NUM_INT; /* FIPs mode can do 20000 bits or none */
-#endif
-
- /* see if we can get enough entropy to make the world
- * a better place.
- */
- while (bufcnt < wantcnt && bufcnt < NUM_INT) {
- list_for_each_entry_safe(rops, tmp, &random_ops, random_list) {
-
- n = (*rops->read_random)(rops->arg, &buf[bufcnt],
- NUM_INT - bufcnt);
-
- /* on failure remove the random number generator */
- if (n == -1) {
- list_del(&rops->random_list);
- printk("crypto: RNG (driverid=0x%x) failed, disabling\n",
- rops->driverid);
- kfree(rops);
- } else if (n > 0)
- bufcnt += n;
- }
- /* give up CPU for a bit, just in case as this is a loop */
- schedule();
- }
-
-
-#ifdef CONFIG_OCF_FIPS
- if (bufcnt > 0 && rndtest_buf((unsigned char *) &buf[0])) {
- dprintk("crypto: buffer had fips errors, discarding\n");
- bufcnt = 0;
- }
-#endif
-
- /*
- * if we have a certified buffer, we can send some data
- * to /dev/random and move along
- */
- if (bufcnt > 0) {
- /* add what we have */
- random_input_words(buf, bufcnt, bufcnt*sizeof(int)*8);
- bufcnt = 0;
- }
-
- /* give up CPU for a bit so we don't hog while filling */
- schedule();
-
- /* wait for needing more */
- wantcnt = random_input_wait();
-
- if (wantcnt <= 0)
- wantcnt = 0; /* try to get some info again */
- else
- /* round up to one word or we can loop forever */
- wantcnt = (wantcnt + (sizeof(int)*8)) / (sizeof(int)*8);
- if (wantcnt > NUM_INT) {
- wantcnt = NUM_INT;
- }
-
- if (signal_pending(current)) {
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
- spin_lock_irq(&current->sigmask_lock);
-#endif
- flush_signals(current);
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)
- spin_unlock_irq(&current->sigmask_lock);
-#endif
- }
- }
-
- kfree(buf);
-
-bad_alloc:
- spin_lock_irq(&random_lock);
- randomproc = (pid_t) -1;
- started = 0;
- spin_unlock_irq(&random_lock);
-
- return retval;
-}
-