343 lines
6.9 KiB
C
343 lines
6.9 KiB
C
/* $NetBSD: rndctl.c,v 1.8 2000/08/28 13:27:37 joda Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1997 Michael Graff.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
* 3. Neither the name of the author nor the names of other contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <err.h>
|
|
#include <string.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/rnd.h>
|
|
|
|
typedef struct {
|
|
char *name;
|
|
u_int32_t type;
|
|
} arg_t;
|
|
|
|
arg_t source_types[] = {
|
|
{ "???", RND_TYPE_UNKNOWN },
|
|
{ "disk", RND_TYPE_DISK },
|
|
{ "net", RND_TYPE_NET },
|
|
{ "net", RND_TYPE_NET },
|
|
{ "tape", RND_TYPE_TAPE },
|
|
{ "tty", RND_TYPE_TTY },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
static void usage(void);
|
|
u_int32_t find_type(char *name);
|
|
char *find_name(u_int32_t);
|
|
void do_ioctl(rndctl_t *);
|
|
char * strflags(u_int32_t);
|
|
void do_list(int, u_int32_t, char *);
|
|
void do_stats(void);
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: rndctl -CEce [-t devtype] [-d devname]\n");
|
|
fprintf(stderr, " rndctl -ls [-t devtype] [-d devname]\n");
|
|
exit(1);
|
|
}
|
|
|
|
u_int32_t
|
|
find_type(char *name)
|
|
{
|
|
arg_t *a;
|
|
|
|
a = source_types;
|
|
|
|
while (a->name != NULL) {
|
|
if (strcmp(a->name, name) == 0)
|
|
return a->type;
|
|
a++;
|
|
}
|
|
|
|
errx(1, "Error: Device type %s unknown", name);
|
|
return 0;
|
|
}
|
|
|
|
char *
|
|
find_name(u_int32_t type)
|
|
{
|
|
arg_t *a;
|
|
|
|
a = source_types;
|
|
|
|
while (a->name != NULL) {
|
|
if (type == a->type)
|
|
return a->name;
|
|
a++;
|
|
}
|
|
|
|
errx(1, "Error: Device type %u unknown", type);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
do_ioctl(rndctl_t *rctl)
|
|
{
|
|
int fd;
|
|
int res;
|
|
|
|
fd = open("/dev/urandom", O_RDONLY, 0644);
|
|
if (fd < 0)
|
|
err(1, "open");
|
|
|
|
res = ioctl(fd, RNDCTL, rctl);
|
|
if (res < 0)
|
|
err(1, "ioctl(RNDCTL)");
|
|
|
|
close(fd);
|
|
}
|
|
|
|
char *
|
|
strflags(u_int32_t fl)
|
|
{
|
|
static char str[512];
|
|
|
|
str[0] = 0;
|
|
if (fl & RND_FLAG_NO_ESTIMATE)
|
|
;
|
|
else
|
|
strcat(str, "estimate");
|
|
|
|
if (fl & RND_FLAG_NO_COLLECT)
|
|
;
|
|
else {
|
|
if (str[0])
|
|
strcat(str, ", ");
|
|
strcat(str, "collect");
|
|
}
|
|
|
|
return str;
|
|
}
|
|
|
|
#define HEADER "Source Bits Type Flags\n"
|
|
|
|
void
|
|
do_list(int all, u_int32_t type, char *name)
|
|
{
|
|
rndstat_t rstat;
|
|
rndstat_name_t rstat_name;
|
|
int fd;
|
|
int res;
|
|
u_int32_t start;
|
|
|
|
fd = open("/dev/urandom", O_RDONLY, 0644);
|
|
if (fd < 0)
|
|
err(1, "open");
|
|
|
|
if (all == 0 && type == 0xff) {
|
|
strncpy(rstat_name.name, name, 16);
|
|
res = ioctl(fd, RNDGETSRCNAME, &rstat_name);
|
|
if (res < 0)
|
|
err(1, "ioctl(RNDGETSRCNAME)");
|
|
printf(HEADER);
|
|
printf("%-16s %10u %-4s %s\n",
|
|
rstat_name.source.name,
|
|
rstat_name.source.total,
|
|
find_name(rstat_name.source.type),
|
|
strflags(rstat_name.source.flags));
|
|
close(fd);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* run through all the devices present in the system, and either
|
|
* print out ones that match, or print out all of them.
|
|
*/
|
|
printf(HEADER);
|
|
start = 0;
|
|
for (;;) {
|
|
rstat.count = RND_MAXSTATCOUNT;
|
|
rstat.start = start;
|
|
res = ioctl(fd, RNDGETSRCNUM, &rstat);
|
|
if (res < 0)
|
|
err(1, "ioctl(RNDGETSRCNUM)");
|
|
|
|
if (rstat.count == 0)
|
|
break;
|
|
|
|
for (res = 0 ; res < rstat.count ; res++) {
|
|
if ((all != 0)
|
|
|| (type == rstat.source[res].type))
|
|
printf("%-16s %10u %-4s %s\n",
|
|
rstat.source[res].name,
|
|
rstat.source[res].total,
|
|
find_name(rstat.source[res].type),
|
|
strflags(rstat.source[res].flags));
|
|
}
|
|
start += rstat.count;
|
|
}
|
|
|
|
close(fd);
|
|
}
|
|
|
|
void
|
|
do_stats()
|
|
{
|
|
rndpoolstat_t rs;
|
|
int fd;
|
|
|
|
fd = open("/dev/urandom", O_RDONLY, 0644);
|
|
if (fd < 0)
|
|
err(1, "open");
|
|
|
|
if (ioctl(fd, RNDGETPOOLSTAT, &rs) < 0)
|
|
err(1, "ioctl(RNDGETPOOLSTAT)");
|
|
|
|
printf("\t%9d bits mixed into pool\n", rs.added);
|
|
printf("\t%9d bits currently stored in pool (max %d)\n",
|
|
rs.curentropy, rs.maxentropy);
|
|
printf("\t%9d bits of entropy discarded due to full pool\n",
|
|
rs.discarded);
|
|
printf("\t%9d hard-random bits generated\n", rs.removed);
|
|
printf("\t%9d pseudo-random bits generated\n", rs.generated);
|
|
|
|
close(fd);
|
|
}
|
|
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
rndctl_t rctl;
|
|
int ch;
|
|
int cmd;
|
|
int lflag;
|
|
int mflag;
|
|
int sflag;
|
|
u_int32_t type;
|
|
char name[16];
|
|
|
|
rctl.mask = 0;
|
|
rctl.flags = 0;
|
|
|
|
cmd = 0;
|
|
lflag = 0;
|
|
mflag = 0;
|
|
sflag = 0;
|
|
type = 0xff;
|
|
|
|
while ((ch = getopt(argc, argv, "CEcelt:d:s")) != -1)
|
|
switch(ch) {
|
|
case 'C':
|
|
rctl.flags |= RND_FLAG_NO_COLLECT;
|
|
rctl.mask |= RND_FLAG_NO_COLLECT;
|
|
mflag++;
|
|
break;
|
|
case 'E':
|
|
rctl.flags |= RND_FLAG_NO_ESTIMATE;
|
|
rctl.mask |= RND_FLAG_NO_ESTIMATE;
|
|
mflag++;
|
|
break;
|
|
case 'c':
|
|
rctl.flags &= ~RND_FLAG_NO_COLLECT;
|
|
rctl.mask |= RND_FLAG_NO_COLLECT;
|
|
mflag++;
|
|
break;
|
|
case 'e':
|
|
rctl.flags &= ~RND_FLAG_NO_ESTIMATE;
|
|
rctl.mask |= RND_FLAG_NO_ESTIMATE;
|
|
mflag++;
|
|
break;
|
|
case 'l':
|
|
lflag++;
|
|
break;
|
|
case 't':
|
|
if (cmd != 0)
|
|
usage();
|
|
cmd = 't';
|
|
|
|
type = find_type(optarg);
|
|
break;
|
|
case 'd':
|
|
if (cmd != 0)
|
|
usage();
|
|
cmd = 'd';
|
|
|
|
type = 0xff;
|
|
strncpy(name, optarg, 16);
|
|
break;
|
|
case 's':
|
|
sflag++;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
/*
|
|
* cannot list and modify at the same time
|
|
*/
|
|
if ((lflag != 0 || sflag != 0) && mflag != 0)
|
|
usage();
|
|
|
|
/*
|
|
* bomb out on no-ops
|
|
*/
|
|
if (lflag == 0 && mflag == 0 && sflag == 0)
|
|
usage();
|
|
|
|
/*
|
|
* if not listing, we need a device name or a type
|
|
*/
|
|
if (lflag == 0 && cmd == 0 && sflag == 0)
|
|
usage();
|
|
|
|
/*
|
|
* modify request
|
|
*/
|
|
if (mflag != 0) {
|
|
rctl.type = type;
|
|
strncpy(rctl.name, name, 16);
|
|
do_ioctl(&rctl);
|
|
|
|
exit(0);
|
|
}
|
|
|
|
/*
|
|
* list sources
|
|
*/
|
|
if (lflag != 0)
|
|
do_list(cmd == 0, type, name);
|
|
|
|
if (sflag != 0)
|
|
do_stats();
|
|
|
|
return 0;
|
|
}
|