--- xnu/xnu-12377.101.15/bsd/dev/random/randomdev.c
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- * Copyright (c) 1999-2009 Apple, Inc. All rights reserved.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the License
- * may not be used to create, or enable the creation or redistribution of,
- * unlawful or unlicensed copies of an Apple operating system, or to
- * circumvent, violate, or enable the circumvention or violation of, any
- * terms of an Apple operating system software license agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
- */
-
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/proc.h>
-#include <sys/errno.h>
-#include <sys/ioctl.h>
-#include <sys/conf.h>
-#include <sys/fcntl.h>
-#include <string.h>
-#include <miscfs/devfs/devfs.h>
-#include <kern/locks.h>
-#include <kern/clock.h>
-#include <sys/time.h>
-#include <sys/malloc.h>
-#include <sys/sysproto.h>
-#include <sys/uio_internal.h>
-
-#include <dev/random/randomdev.h>
-
-#include <libkern/OSByteOrder.h>
-#include <libkern/OSAtomic.h>
-
-#include <mach/mach_time.h>
-
-#define RANDOM_MAJOR  -1 /* let the kernel pick the device number */
-#define RANDOM_MINOR   0
-#define URANDOM_MINOR  1
-
-d_ioctl_t       random_ioctl;
-
-static int
-random_stop(__unused struct tty *tp, __unused int rw)
-{
-	return 0;
-}
-
-static int
-random_reset(__unused int uban)
-{
-	return 0;
-}
-
-static int
-random_select(__unused dev_t dev, __unused int which, __unused void *wql,
-    __unused struct proc *p)
-{
-	return ENODEV;
-}
-
-static const struct cdevsw random_cdevsw =
-{
-	.d_open = random_open,
-	.d_close = random_close,
-	.d_read = random_read,
-	.d_write = random_write,
-	.d_ioctl = random_ioctl,
-	.d_stop = random_stop,
-	.d_reset = random_reset,
-	.d_select = random_select,
-	.d_mmap = eno_mmap,
-	.d_strategy = eno_strat,
-	.d_reserved_1 = eno_getc,
-	.d_reserved_2 = eno_putc,
-};
-
-
-/*
- * Called to initialize our device,
- * and to register ourselves with devfs
- */
-void
-random_init(void)
-{
-	int ret;
-
-	ret = cdevsw_add(RANDOM_MAJOR, &random_cdevsw);
-	if (ret < 0) {
-		panic("random_init: failed to allocate a major number!");
-	}
-
-	devfs_make_node(makedev(ret, RANDOM_MINOR), DEVFS_CHAR,
-	    UID_ROOT, GID_WHEEL, 0666, "random");
-
-	/*
-	 * also make urandom
-	 * (which is exactly the same thing in our context)
-	 */
-	devfs_make_node(makedev(ret, URANDOM_MINOR), DEVFS_CHAR,
-	    UID_ROOT, GID_WHEEL, 0666, "urandom");
-}
-
-int
-random_ioctl(   __unused dev_t dev, u_long cmd, __unused caddr_t data,
-    __unused int flag, __unused struct proc *p  )
-{
-	switch (cmd) {
-	case FIONBIO:
-	case FIOASYNC:
-		break;
-	default:
-		return ENODEV;
-	}
-
-	return 0;
-}
-
-/*
- * Open the device.  Make sure init happened, and make sure the caller is
- * authorized.
- */
-
-int
-random_open(__unused dev_t dev, int flags, __unused int devtype, __unused struct proc *p)
-{
-	/*
-	 * if we are being opened for write,
-	 * make sure that we have privledges do so
-	 */
-	if (flags & FWRITE) {
-		if (securelevel >= 2) {
-			return EPERM;
-		}
-#ifndef __APPLE__
-		if ((securelevel >= 1) && proc_suser(p)) {
-			return EPERM;
-		}
-#endif  /* !__APPLE__ */
-	}
-
-	return 0;
-}
-
-
-/*
- * close the device.
- */
-
-int
-random_close(__unused dev_t dev, __unused int flags, __unused int mode, __unused struct proc *p)
-{
-	return 0;
-}
-
-
-/*
- * Get entropic data from the Security Server, and use it to reseed the
- * prng.
- */
-int
-random_write(dev_t dev, struct uio *uio, __unused int ioflag)
-{
-	int retCode = 0;
-	char rdBuffer[256];
-
-	if (minor(dev) != RANDOM_MINOR) {
-		return EPERM;
-	}
-
-	/* Security server is sending us entropy */
-
-	while ((size_t)uio_resid(uio) > 0 && retCode == 0) {
-		/* get the user's data */
-		size_t bytesToInput = MIN((size_t)uio_resid(uio), sizeof(rdBuffer));
-		retCode = uiomove(rdBuffer, (int)bytesToInput, uio);
-		if (retCode != 0) {
-			break;
-		}
-		retCode = write_random(rdBuffer, (u_int)bytesToInput);
-		if (retCode != 0) {
-			break;
-		}
-	}
-
-	return retCode;
-}
-
-/*
- * return data to the caller.  Results unpredictable.
- */
-int
-random_read(__unused dev_t dev, struct uio *uio, __unused int ioflag)
-{
-	int retCode = 0;
-	char buffer[512];
-
-	size_t bytes_remaining = (size_t)uio_resid(uio);
-	while (bytes_remaining > 0 && retCode == 0) {
-		size_t bytesToRead = MIN(bytes_remaining, sizeof(buffer));
-		read_random(buffer, (u_int)bytesToRead);
-
-		retCode = uiomove(buffer, (int)bytesToRead, uio);
-		if (retCode != 0) {
-			break;
-		}
-
-		bytes_remaining = (size_t)uio_resid(uio);
-	}
-
-	return retCode;
-}
-
-/*
- * Return an u_int32_t pseudo-random number.
- */
-u_int32_t
-RandomULong(void)
-{
-	u_int32_t buf;
-	read_random(&buf, sizeof(buf));
-	return buf;
-}
-
-
-int
-getentropy(__unused struct proc * p, struct getentropy_args *gap, __unused int * ret)
-{
-	user_addr_t user_addr;
-	user_size_t user_size;
-	char buffer[256];
-
-	user_addr = (user_addr_t)gap->buffer;
-	user_size = gap->size;
-	/* Can't request more than 256 random bytes
-	 * at once. Complying with openbsd getentropy()
-	 */
-	if (user_size > sizeof(buffer)) {
-		return EINVAL;
-	}
-	read_random(buffer, (u_int)user_size);
-	return copyout(buffer, user_addr, user_size);
-}