707d98fe2f
The random_get() system call works similar to getentropy()/getrandom() on OpenBSD/Linux. It fills a buffer with random data. This change introduces a new function, read_random_uio(), that is used to implement read() on the random devices. We can call into this function from within the CloudABI compatibility layer. Approved by: secteam Reviewed by: jmg, markm, wblock Obtained from: https://github.com/NuxiNL/freebsd Differential Revision: https://reviews.freebsd.org/D3053
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/*-
|
|
* Copyright (c) 2015 Nuxi, https://nuxi.nl/
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/random.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include <compat/cloudabi/cloudabi_proto.h>
|
|
|
|
int
|
|
cloudabi_sys_random_get(struct thread *td,
|
|
struct cloudabi_sys_random_get_args *uap)
|
|
{
|
|
struct iovec iov = {
|
|
.iov_base = uap->buf,
|
|
.iov_len = uap->nbyte
|
|
};
|
|
struct uio uio = {
|
|
.uio_iov = &iov,
|
|
.uio_iovcnt = 1,
|
|
.uio_resid = iov.iov_len,
|
|
.uio_segflg = UIO_USERSPACE,
|
|
.uio_rw = UIO_READ,
|
|
.uio_td = td
|
|
};
|
|
|
|
return (read_random_uio(&uio, false));
|
|
}
|