* 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
* 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,
* 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 <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>
*/
static struct cdevsw random_cdevsw =
{
- random_open, /* open */
- random_close, /* close */
- random_read, /* read */
- random_write, /* write */
- random_ioctl, /* ioctl */
+ random_open, /* open */
+ random_close, /* close */
+ random_read, /* read */
+ random_write, /* write */
+ random_ioctl, /* ioctl */
(stop_fcn_t *)nulldev, /* stop */
(reset_fcn_t *)nulldev, /* reset */
- NULL, /* tty's */
- eno_select, /* select */
- eno_mmap, /* mmap */
- eno_strat, /* strategy */
- eno_getc, /* getc */
- eno_putc, /* putc */
- 0 /* type */
+ NULL, /* tty's */
+ eno_select, /* select */
+ eno_mmap, /* mmap */
+ eno_strat, /* strategy */
+ eno_getc, /* getc */
+ eno_putc, /* putc */
+ 0 /* type */
};
panic("random_init: failed to allocate a major number!");
}
- devfs_make_node(makedev (ret, RANDOM_MINOR), DEVFS_CHAR,
- UID_ROOT, GID_WHEEL, 0666, "random", 0);
+ devfs_make_node(makedev(ret, RANDOM_MINOR), DEVFS_CHAR,
+ UID_ROOT, GID_WHEEL, 0666, "random", 0);
/*
- * also make urandom
+ * 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", 0);
-
+ devfs_make_node(makedev(ret, URANDOM_MINOR), DEVFS_CHAR,
+ UID_ROOT, GID_WHEEL, 0666, "urandom", 0);
}
int
-random_ioctl( __unused dev_t dev, u_long cmd, __unused caddr_t data,
- __unused int flag, __unused struct proc *p )
+random_ioctl( __unused dev_t dev, u_long cmd, __unused caddr_t data,
+ __unused int flag, __unused struct proc *p )
{
switch (cmd) {
case FIONBIO:
return ENODEV;
}
- return (0);
+ 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)
{
* make sure that we have privledges do so
*/
if (flags & FWRITE) {
- if (securelevel >= 2)
- return (EPERM);
+ if (securelevel >= 2) {
+ return EPERM;
+ }
#ifndef __APPLE__
- if ((securelevel >= 1) && proc_suser(p))
- return (EPERM);
-#endif /* !__APPLE__ */
+ if ((securelevel >= 1) && proc_suser(p)) {
+ return EPERM;
+ }
+#endif /* !__APPLE__ */
}
- return (0);
+ return 0;
}
/*
* close the device.
*/
-
+
int
random_close(__unused dev_t dev, __unused int flags, __unused int mode, __unused struct proc *p)
{
- return (0);
+ return 0;
}
* prng.
*/
int
-random_write (dev_t dev, struct uio *uio, __unused int ioflag)
+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 (uio_resid(uio) > 0 && retCode == 0) {
- /* get the user's data */
- int bytesToInput = MIN(uio_resid(uio),
- (user_ssize_t) sizeof(rdBuffer));
- retCode = uiomove(rdBuffer, bytesToInput, uio);
- if (retCode != 0)
- break;
- retCode = write_random(rdBuffer, bytesToInput);
- if (retCode != 0)
- break;
- }
-
- return retCode;
+ int retCode = 0;
+ char rdBuffer[256];
+
+ if (minor(dev) != RANDOM_MINOR) {
+ return EPERM;
+ }
+
+ /* Security server is sending us entropy */
+
+ while (uio_resid(uio) > 0 && retCode == 0) {
+ /* get the user's data */
+ int bytesToInput = MIN(uio_resid(uio),
+ (user_ssize_t) sizeof(rdBuffer));
+ retCode = uiomove(rdBuffer, bytesToInput, uio);
+ if (retCode != 0) {
+ break;
+ }
+ retCode = write_random(rdBuffer, 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)
{
user_ssize_t bytes_remaining = uio_resid(uio);
while (bytes_remaining > 0 && retCode == 0) {
int bytesToRead = MIN(bytes_remaining,
- (user_ssize_t) sizeof(buffer));
+ (user_ssize_t) sizeof(buffer));
read_random(buffer, bytesToRead);
-
+
retCode = uiomove(buffer, bytesToRead, uio);
- if (retCode != 0)
+ if (retCode != 0) {
break;
-
+ }
+
bytes_remaining = uio_resid(uio);
}
-
+
return retCode;
}
RandomULong(void)
{
u_int32_t buf;
- read_random(&buf, sizeof (buf));
- return (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;
+ uint32_t user_size;
+ char buffer[256];
+
+ user_addr = (vm_map_offset_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, user_size);
+ return copyout(buffer, user_addr, user_size);
+}
projects / apple / xnu.git / blobdiff