8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
295 lines
7.2 KiB
C
295 lines
7.2 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright (c) 1980, 1993
|
|
* The Regents of the University of California. 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 University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
|
|
*/
|
|
|
|
#if 0
|
|
#ifndef lint
|
|
static const char copyright[] =
|
|
"@(#) Copyright (c) 1980, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "From: @(#)swapon.c 8.1 (Berkeley) 6/5/93";
|
|
#endif /* not lint */
|
|
#endif
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/capsicum.h>
|
|
#include <sys/disk.h>
|
|
#include <sys/sysctl.h>
|
|
|
|
#include <assert.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sysexits.h>
|
|
#include <unistd.h>
|
|
|
|
#ifdef HAVE_CRYPTO
|
|
#include <openssl/err.h>
|
|
#include <openssl/pem.h>
|
|
#include <openssl/rsa.h>
|
|
#endif
|
|
|
|
static int verbose;
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "%s\n%s\n%s\n",
|
|
"usage: dumpon [-v] [-k public_key_file] [-z] special_file",
|
|
" dumpon [-v] off",
|
|
" dumpon [-v] -l");
|
|
exit(EX_USAGE);
|
|
}
|
|
|
|
static void
|
|
check_size(int fd, const char *fn)
|
|
{
|
|
int name[] = { CTL_HW, HW_PHYSMEM };
|
|
size_t namelen = nitems(name);
|
|
unsigned long physmem;
|
|
size_t len;
|
|
off_t mediasize;
|
|
int minidump;
|
|
|
|
len = sizeof(minidump);
|
|
if (sysctlbyname("debug.minidump", &minidump, &len, NULL, 0) == 0 &&
|
|
minidump == 1)
|
|
return;
|
|
len = sizeof(physmem);
|
|
if (sysctl(name, namelen, &physmem, &len, NULL, 0) != 0)
|
|
err(EX_OSERR, "can't get memory size");
|
|
if (ioctl(fd, DIOCGMEDIASIZE, &mediasize) != 0)
|
|
err(EX_OSERR, "%s: can't get size", fn);
|
|
if ((uintmax_t)mediasize < (uintmax_t)physmem) {
|
|
if (verbose)
|
|
printf("%s is smaller than physical memory\n", fn);
|
|
exit(EX_IOERR);
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_CRYPTO
|
|
static void
|
|
genkey(const char *pubkeyfile, struct diocskerneldump_arg *kda)
|
|
{
|
|
FILE *fp;
|
|
RSA *pubkey;
|
|
|
|
assert(pubkeyfile != NULL);
|
|
assert(kda != NULL);
|
|
|
|
fp = NULL;
|
|
pubkey = NULL;
|
|
|
|
fp = fopen(pubkeyfile, "r");
|
|
if (fp == NULL)
|
|
err(1, "Unable to open %s", pubkeyfile);
|
|
|
|
if (cap_enter() < 0 && errno != ENOSYS)
|
|
err(1, "Unable to enter capability mode");
|
|
|
|
pubkey = RSA_new();
|
|
if (pubkey == NULL) {
|
|
errx(1, "Unable to allocate an RSA structure: %s",
|
|
ERR_error_string(ERR_get_error(), NULL));
|
|
}
|
|
|
|
pubkey = PEM_read_RSA_PUBKEY(fp, &pubkey, NULL, NULL);
|
|
fclose(fp);
|
|
fp = NULL;
|
|
if (pubkey == NULL)
|
|
errx(1, "Unable to read data from %s.", pubkeyfile);
|
|
|
|
kda->kda_encryptedkeysize = RSA_size(pubkey);
|
|
if (kda->kda_encryptedkeysize > KERNELDUMP_ENCKEY_MAX_SIZE) {
|
|
errx(1, "Public key has to be at most %db long.",
|
|
8 * KERNELDUMP_ENCKEY_MAX_SIZE);
|
|
}
|
|
|
|
kda->kda_encryptedkey = calloc(1, kda->kda_encryptedkeysize);
|
|
if (kda->kda_encryptedkey == NULL)
|
|
err(1, "Unable to allocate encrypted key");
|
|
|
|
kda->kda_encryption = KERNELDUMP_ENC_AES_256_CBC;
|
|
arc4random_buf(kda->kda_key, sizeof(kda->kda_key));
|
|
if (RSA_public_encrypt(sizeof(kda->kda_key), kda->kda_key,
|
|
kda->kda_encryptedkey, pubkey,
|
|
RSA_PKCS1_PADDING) != (int)kda->kda_encryptedkeysize) {
|
|
errx(1, "Unable to encrypt the one-time key.");
|
|
}
|
|
RSA_free(pubkey);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
listdumpdev(void)
|
|
{
|
|
char dumpdev[PATH_MAX];
|
|
size_t len;
|
|
const char *sysctlname = "kern.shutdown.dumpdevname";
|
|
|
|
len = sizeof(dumpdev);
|
|
if (sysctlbyname(sysctlname, &dumpdev, &len, NULL, 0) != 0) {
|
|
if (errno == ENOMEM) {
|
|
err(EX_OSERR, "Kernel returned too large of a buffer for '%s'\n",
|
|
sysctlname);
|
|
} else {
|
|
err(EX_OSERR, "Sysctl get '%s'\n", sysctlname);
|
|
}
|
|
}
|
|
if (verbose) {
|
|
printf("kernel dumps on ");
|
|
}
|
|
if (strlen(dumpdev) == 0) {
|
|
printf("%s\n", _PATH_DEVNULL);
|
|
} else {
|
|
printf("%s\n", dumpdev);
|
|
}
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
struct diocskerneldump_arg kda;
|
|
const char *pubkeyfile;
|
|
int ch;
|
|
int i, fd;
|
|
int do_listdumpdev = 0;
|
|
bool enable, gzip;
|
|
|
|
gzip = false;
|
|
pubkeyfile = NULL;
|
|
|
|
while ((ch = getopt(argc, argv, "k:lvz")) != -1)
|
|
switch((char)ch) {
|
|
case 'k':
|
|
pubkeyfile = optarg;
|
|
break;
|
|
case 'l':
|
|
do_listdumpdev = 1;
|
|
break;
|
|
case 'v':
|
|
verbose = 1;
|
|
break;
|
|
case 'z':
|
|
gzip = true;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (do_listdumpdev) {
|
|
listdumpdev();
|
|
exit(EX_OK);
|
|
}
|
|
|
|
if (argc != 1)
|
|
usage();
|
|
|
|
enable = (strcmp(argv[0], "off") != 0);
|
|
#ifndef HAVE_CRYPTO
|
|
if (pubkeyfile != NULL) {
|
|
enable = false;
|
|
warnx("Unable to use the public key. Recompile dumpon with OpenSSL support.");
|
|
}
|
|
#endif
|
|
|
|
if (enable) {
|
|
char tmp[PATH_MAX];
|
|
char *dumpdev;
|
|
|
|
if (strncmp(argv[0], _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) {
|
|
dumpdev = argv[0];
|
|
} else {
|
|
i = snprintf(tmp, PATH_MAX, "%s%s", _PATH_DEV, argv[0]);
|
|
if (i < 0) {
|
|
err(EX_OSERR, "%s", argv[0]);
|
|
} else if (i >= PATH_MAX) {
|
|
errno = EINVAL;
|
|
err(EX_DATAERR, "%s", argv[0]);
|
|
}
|
|
dumpdev = tmp;
|
|
}
|
|
fd = open(dumpdev, O_RDONLY);
|
|
if (fd < 0)
|
|
err(EX_OSFILE, "%s", dumpdev);
|
|
|
|
if (!gzip)
|
|
check_size(fd, dumpdev);
|
|
|
|
bzero(&kda, sizeof(kda));
|
|
kda.kda_enable = 0;
|
|
i = ioctl(fd, DIOCSKERNELDUMP, &kda);
|
|
explicit_bzero(&kda, sizeof(kda));
|
|
|
|
#ifdef HAVE_CRYPTO
|
|
if (pubkeyfile != NULL)
|
|
genkey(pubkeyfile, &kda);
|
|
#endif
|
|
|
|
kda.kda_enable = 1;
|
|
kda.kda_compression = gzip ? KERNELDUMP_COMP_GZIP :
|
|
KERNELDUMP_COMP_NONE;
|
|
i = ioctl(fd, DIOCSKERNELDUMP, &kda);
|
|
explicit_bzero(kda.kda_encryptedkey, kda.kda_encryptedkeysize);
|
|
free(kda.kda_encryptedkey);
|
|
explicit_bzero(&kda, sizeof(kda));
|
|
if (i == 0 && verbose)
|
|
printf("kernel dumps on %s\n", dumpdev);
|
|
} else {
|
|
fd = open(_PATH_DEVNULL, O_RDONLY);
|
|
if (fd < 0)
|
|
err(EX_OSFILE, "%s", _PATH_DEVNULL);
|
|
|
|
kda.kda_enable = 0;
|
|
i = ioctl(fd, DIOCSKERNELDUMP, &kda);
|
|
explicit_bzero(&kda, sizeof(kda));
|
|
if (i == 0 && verbose)
|
|
printf("kernel dumps disabled\n");
|
|
}
|
|
if (i < 0)
|
|
err(EX_OSERR, "ioctl(DIOCSKERNELDUMP)");
|
|
|
|
exit (0);
|
|
}
|