/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2011 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see .
***/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include "log.h"
#include "util.h"
#include "path-util.h"
#include "build.h"
#include "pager.h"
#include "logs-show.h"
#include "strv.h"
#include "journal-internal.h"
#include "journal-def.h"
#include "journal-verify.h"
#include "journal-authenticate.h"
#include "journal-qrcode.h"
#include "fsprg.h"
#define DEFAULT_FSS_INTERVAL_USEC (15*USEC_PER_MINUTE)
static OutputMode arg_output = OUTPUT_SHORT;
static bool arg_follow = false;
static bool arg_show_all = false;
static bool arg_no_pager = false;
static int arg_lines = -1;
static bool arg_no_tail = false;
static bool arg_quiet = false;
static bool arg_merge = false;
static bool arg_this_boot = false;
static const char *arg_directory = NULL;
static int arg_priorities = 0xFF;
static const char *arg_verify_key = NULL;
#ifdef HAVE_GCRYPT
static usec_t arg_interval = DEFAULT_FSS_INTERVAL_USEC;
#endif
static enum {
ACTION_SHOW,
ACTION_NEW_ID128,
ACTION_PRINT_HEADER,
ACTION_SETUP_KEYS,
ACTION_VERIFY
} arg_action = ACTION_SHOW;
static int help(void) {
printf("%s [OPTIONS...] [MATCH]\n\n"
"Send control commands to or query the journal.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --no-pager Do not pipe output into a pager\n"
" -a --all Show all fields, including long and unprintable\n"
" -f --follow Follow journal\n"
" -n --lines=INTEGER Journal entries to show\n"
" --no-tail Show all lines, even in follow mode\n"
" -o --output=STRING Change journal output mode (short, short-monotonic,\n"
" verbose, export, json, json-pretty, cat)\n"
" -q --quiet Don't show privilege warning\n"
" -m --merge Show entries from all available journals\n"
" -b --this-boot Show data only from current boot\n"
" -D --directory=PATH Show journal files from directory\n"
" -p --priority=RANGE Show only messages within the specified priority range\n\n"
"Commands:\n"
" --new-id128 Generate a new 128 Bit ID\n"
" --header Show journal header information\n"
#ifdef HAVE_GCRYPT
" --setup-keys Generate new FSS key pair\n"
" --interval=TIME Time interval for changing the FSS sealing key\n"
" --verify Verify journal file consistency\n"
" --verify-key=KEY Specify FSS verification key\n"
#endif
, program_invocation_short_name);
return 0;
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_NO_PAGER,
ARG_NO_TAIL,
ARG_NEW_ID128,
ARG_HEADER,
ARG_SETUP_KEYS,
ARG_INTERVAL,
ARG_VERIFY,
ARG_VERIFY_KEY
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version" , no_argument, NULL, ARG_VERSION },
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
{ "follow", no_argument, NULL, 'f' },
{ "output", required_argument, NULL, 'o' },
{ "all", no_argument, NULL, 'a' },
{ "lines", required_argument, NULL, 'n' },
{ "no-tail", no_argument, NULL, ARG_NO_TAIL },
{ "new-id128", no_argument, NULL, ARG_NEW_ID128 },
{ "quiet", no_argument, NULL, 'q' },
{ "merge", no_argument, NULL, 'm' },
{ "this-boot", no_argument, NULL, 'b' },
{ "directory", required_argument, NULL, 'D' },
{ "header", no_argument, NULL, ARG_HEADER },
{ "priority", no_argument, NULL, 'p' },
{ "setup-keys", no_argument, NULL, ARG_SETUP_KEYS },
{ "interval", required_argument, NULL, ARG_INTERVAL },
{ "verify", no_argument, NULL, ARG_VERIFY },
{ "verify-key", required_argument, NULL, ARG_VERIFY_KEY },
{ NULL, 0, NULL, 0 }
};
int c, r;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "hfo:an:qmbD:p:", options, NULL)) >= 0) {
switch (c) {
case 'h':
help();
return 0;
case ARG_VERSION:
puts(PACKAGE_STRING);
puts(DISTRIBUTION);
puts(SYSTEMD_FEATURES);
return 0;
case ARG_NO_PAGER:
arg_no_pager = true;
break;
case 'f':
arg_follow = true;
break;
case 'o':
arg_output = output_mode_from_string(optarg);
if (arg_output < 0) {
log_error("Unknown output '%s'.", optarg);
return -EINVAL;
}
break;
case 'a':
arg_show_all = true;
break;
case 'n':
r = safe_atoi(optarg, &arg_lines);
if (r < 0 || arg_lines < 0) {
log_error("Failed to parse lines '%s'", optarg);
return -EINVAL;
}
break;
case ARG_NO_TAIL:
arg_no_tail = true;
break;
case ARG_NEW_ID128:
arg_action = ACTION_NEW_ID128;
break;
case 'q':
arg_quiet = true;
break;
case 'm':
arg_merge = true;
break;
case 'b':
arg_this_boot = true;
break;
case 'D':
arg_directory = optarg;
break;
case ARG_HEADER:
arg_action = ACTION_PRINT_HEADER;
break;
case ARG_VERIFY:
arg_action = ACTION_VERIFY;
break;
#ifdef HAVE_GCRYPT
case ARG_SETUP_KEYS:
arg_action = ACTION_SETUP_KEYS;
break;
case ARG_VERIFY_KEY:
arg_action = ACTION_VERIFY;
arg_verify_key = optarg;
arg_merge = false;
break;
case ARG_INTERVAL:
r = parse_usec(optarg, &arg_interval);
if (r < 0 || arg_interval <= 0) {
log_error("Failed to parse sealing key change interval: %s", optarg);
return -EINVAL;
}
break;
#else
case ARG_SETUP_KEYS:
case ARG_VERIFY_KEY:
case ARG_INTERVAL:
log_error("Forward-secure sealing not available.");
return -ENOTSUP;
#endif
case 'p': {
const char *dots;
dots = strstr(optarg, "..");
if (dots) {
char *a;
int from, to, i;
/* a range */
a = strndup(optarg, dots - optarg);
if (!a)
return log_oom();
from = log_level_from_string(a);
to = log_level_from_string(dots + 2);
free(a);
if (from < 0 || to < 0) {
log_error("Failed to parse log level range %s", optarg);
return -EINVAL;
}
arg_priorities = 0;
if (from < to) {
for (i = from; i <= to; i++)
arg_priorities |= 1 << i;
} else {
for (i = to; i <= from; i++)
arg_priorities |= 1 << i;
}
} else {
int p, i;
p = log_level_from_string(optarg);
if (p < 0) {
log_error("Unknown log level %s", optarg);
return -EINVAL;
}
arg_priorities = 0;
for (i = 0; i <= p; i++)
arg_priorities |= 1 << i;
}
break;
}
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
if (arg_follow && !arg_no_tail && arg_lines < 0)
arg_lines = 10;
return 1;
}
static bool on_tty(void) {
static int t = -1;
/* Note that this is invoked relatively early, before we start
* the pager. That means the value we return reflects whether
* we originally were started on a tty, not if we currently
* are. But this is intended, since we want colour and so on
* when run in our own pager. */
if (_unlikely_(t < 0))
t = isatty(STDOUT_FILENO) > 0;
return t;
}
static int generate_new_id128(void) {
sd_id128_t id;
int r;
unsigned i;
r = sd_id128_randomize(&id);
if (r < 0) {
log_error("Failed to generate ID: %s", strerror(-r));
return r;
}
printf("As string:\n"
SD_ID128_FORMAT_STR "\n\n"
"As UUID:\n"
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x\n\n"
"As macro:\n"
"#define MESSAGE_XYZ SD_ID128_MAKE(",
SD_ID128_FORMAT_VAL(id),
SD_ID128_FORMAT_VAL(id));
for (i = 0; i < 16; i++)
printf("%02x%s", id.bytes[i], i != 15 ? "," : "");
fputs(")\n", stdout);
return 0;
}
static int add_matches(sd_journal *j, char **args) {
char **i;
int r;
assert(j);
STRV_FOREACH(i, args) {
if (streq(*i, "+"))
r = sd_journal_add_disjunction(j);
else if (path_is_absolute(*i)) {
char *p, *t = NULL;
const char *path;
struct stat st;
p = canonicalize_file_name(*i);
path = p ? p : *i;
if (stat(path, &st) < 0) {
free(p);
log_error("Couldn't stat file: %m");
return -errno;
}
if (S_ISREG(st.st_mode) && (0111 & st.st_mode))
t = strappend("_EXE=", path);
else if (S_ISCHR(st.st_mode))
asprintf(&t, "_KERNEL_DEVICE=c%u:%u", major(st.st_rdev), minor(st.st_rdev));
else if (S_ISBLK(st.st_mode))
asprintf(&t, "_KERNEL_DEVICE=b%u:%u", major(st.st_rdev), minor(st.st_rdev));
else {
free(p);
log_error("File is not a device node, regular file or is not executable: %s", *i);
return -EINVAL;
}
free(p);
if (!t)
return log_oom();
r = sd_journal_add_match(j, t, 0);
free(t);
} else
r = sd_journal_add_match(j, *i, 0);
if (r < 0) {
log_error("Failed to add match '%s': %s", *i, strerror(-r));
return r;
}
}
return 0;
}
static int add_this_boot(sd_journal *j) {
char match[9+32+1] = "_BOOT_ID=";
sd_id128_t boot_id;
int r;
assert(j);
if (!arg_this_boot)
return 0;
r = sd_id128_get_boot(&boot_id);
if (r < 0) {
log_error("Failed to get boot id: %s", strerror(-r));
return r;
}
sd_id128_to_string(boot_id, match + 9);
r = sd_journal_add_match(j, match, strlen(match));
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
return r;
}
return 0;
}
static int add_priorities(sd_journal *j) {
char match[] = "PRIORITY=0";
int i, r;
assert(j);
if (arg_priorities == 0xFF)
return 0;
for (i = LOG_EMERG; i <= LOG_DEBUG; i++)
if (arg_priorities & (1 << i)) {
match[sizeof(match)-2] = '0' + i;
log_info("adding match %s", match);
r = sd_journal_add_match(j, match, strlen(match));
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
return r;
}
}
return 0;
}
static int setup_keys(void) {
#ifdef HAVE_GCRYPT
size_t mpk_size, seed_size, state_size, i;
uint8_t *mpk, *seed, *state;
ssize_t l;
int fd = -1, r, attr = 0;
sd_id128_t machine, boot;
char *p = NULL, *k = NULL;
struct FSSHeader h;
uint64_t n;
r = sd_id128_get_machine(&machine);
if (r < 0) {
log_error("Failed to get machine ID: %s", strerror(-r));
return r;
}
r = sd_id128_get_boot(&boot);
if (r < 0) {
log_error("Failed to get boot ID: %s", strerror(-r));
return r;
}
if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss",
SD_ID128_FORMAT_VAL(machine)) < 0)
return log_oom();
if (access(p, F_OK) >= 0) {
log_error("Sealing key file %s exists already.", p);
r = -EEXIST;
goto finish;
}
if (asprintf(&k, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss.tmp.XXXXXX",
SD_ID128_FORMAT_VAL(machine)) < 0) {
r = log_oom();
goto finish;
}
mpk_size = FSPRG_mskinbytes(FSPRG_RECOMMENDED_SECPAR);
mpk = alloca(mpk_size);
seed_size = FSPRG_RECOMMENDED_SEEDLEN;
seed = alloca(seed_size);
state_size = FSPRG_stateinbytes(FSPRG_RECOMMENDED_SECPAR);
state = alloca(state_size);
fd = open("/dev/random", O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (fd < 0) {
log_error("Failed to open /dev/random: %m");
r = -errno;
goto finish;
}
log_info("Generating seed...");
l = loop_read(fd, seed, seed_size, true);
if (l < 0 || (size_t) l != seed_size) {
log_error("Failed to read random seed: %s", strerror(EIO));
r = -EIO;
goto finish;
}
log_info("Generating key pair...");
FSPRG_GenMK(NULL, mpk, seed, seed_size, FSPRG_RECOMMENDED_SECPAR);
log_info("Generating sealing key...");
FSPRG_GenState0(state, mpk, seed, seed_size);
assert(arg_interval > 0);
n = now(CLOCK_REALTIME);
n /= arg_interval;
close_nointr_nofail(fd);
fd = mkostemp(k, O_WRONLY|O_CLOEXEC|O_NOCTTY);
if (fd < 0) {
log_error("Failed to open %s: %m", k);
r = -errno;
goto finish;
}
/* Enable secure remove, exclusion from dump, synchronous
* writing and in-place updating */
if (ioctl(fd, FS_IOC_GETFLAGS, &attr) < 0)
log_warning("FS_IOC_GETFLAGS failed: %m");
attr |= FS_SECRM_FL|FS_NODUMP_FL|FS_SYNC_FL|FS_NOCOW_FL;
if (ioctl(fd, FS_IOC_SETFLAGS, &attr) < 0)
log_warning("FS_IOC_SETFLAGS failed: %m");
zero(h);
memcpy(h.signature, "KSHHRHLP", 8);
h.machine_id = machine;
h.boot_id = boot;
h.header_size = htole64(sizeof(h));
h.start_usec = htole64(n * arg_interval);
h.interval_usec = htole64(arg_interval);
h.fsprg_secpar = htole16(FSPRG_RECOMMENDED_SECPAR);
h.fsprg_state_size = htole64(state_size);
l = loop_write(fd, &h, sizeof(h), false);
if (l < 0 || (size_t) l != sizeof(h)) {
log_error("Failed to write header: %s", strerror(EIO));
r = -EIO;
goto finish;
}
l = loop_write(fd, state, state_size, false);
if (l < 0 || (size_t) l != state_size) {
log_error("Failed to write state: %s", strerror(EIO));
r = -EIO;
goto finish;
}
if (link(k, p) < 0) {
log_error("Failed to link file: %m");
r = -errno;
goto finish;
}
if (isatty(STDOUT_FILENO)) {
fprintf(stderr,
"\n"
"The new key pair has been generated. The " ANSI_HIGHLIGHT_ON "secret sealing key" ANSI_HIGHLIGHT_OFF " has been written to\n"
"the following local file. This key file is automatically updated when the\n"
"sealing key is advanced. It should not be used on multiple hosts.\n"
"\n"
"\t%s\n"
"\n"
"Please write down the following " ANSI_HIGHLIGHT_ON "secret verification key" ANSI_HIGHLIGHT_OFF ". It should be stored\n"
"at a safe location and should not be saved locally on disk.\n"
"\n\t" ANSI_HIGHLIGHT_RED_ON, p);
fflush(stderr);
}
for (i = 0; i < seed_size; i++) {
if (i > 0 && i % 3 == 0)
putchar('-');
printf("%02x", ((uint8_t*) seed)[i]);
}
printf("/%llx-%llx\n", (unsigned long long) n, (unsigned long long) arg_interval);
if (isatty(STDOUT_FILENO)) {
char tsb[FORMAT_TIMESPAN_MAX], *hn;
fprintf(stderr,
ANSI_HIGHLIGHT_OFF "\n"
"The sealing key is automatically changed every %s.\n",
format_timespan(tsb, sizeof(tsb), arg_interval));
hn = gethostname_malloc();
if (hn) {
hostname_cleanup(hn);
fprintf(stderr, "\nThe keys have been generated for host %s/" SD_ID128_FORMAT_STR ".\n", hn, SD_ID128_FORMAT_VAL(machine));
} else
fprintf(stderr, "\nThe keys have been generated for host " SD_ID128_FORMAT_STR ".\n", SD_ID128_FORMAT_VAL(machine));
#ifdef HAVE_QRENCODE
fprintf(stderr, "\nTo transfer the verification key to your phone please scan the QR code below:\n\n");
print_qr_code(stderr, seed, seed_size, n, arg_interval, hn, machine);
#endif
free(hn);
}
r = 0;
finish:
if (fd >= 0)
close_nointr_nofail(fd);
if (k) {
unlink(k);
free(k);
}
free(p);
return r;
#else
log_error("Forward-secure sealing not available.");
return -ENOTSUP;
#endif
}
static int verify(sd_journal *j) {
int r = 0;
Iterator i;
JournalFile *f;
assert(j);
log_show_color(true);
HASHMAP_FOREACH(f, j->files, i) {
int k;
usec_t from, to, total;
#ifdef HAVE_GCRYPT
if (!arg_verify_key && JOURNAL_HEADER_SEALED(f->header))
log_notice("Journal file %s has sealing enabled but verification key has not been passed using --verify-key=.", f->path);
#endif
k = journal_file_verify(f, arg_verify_key, &from, &to, &total, true);
if (k == -EINVAL) {
/* If the key was invalid give up right-away. */
return k;
} else if (k < 0) {
log_warning("FAIL: %s (%s)", f->path, strerror(-k));
r = k;
} else {
char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX], c[FORMAT_TIMESPAN_MAX];
log_info("PASS: %s", f->path);
if (arg_verify_key && JOURNAL_HEADER_SEALED(f->header)) {
if (from > 0) {
log_info("=> Validated from %s to %s, final %s entries not sealed.",
format_timestamp(a, sizeof(a), from),
format_timestamp(b, sizeof(b), to),
format_timespan(c, sizeof(c), total > to ? total - to : 0));
} else if (total > 0)
log_info("=> No sealing yet, %s of entries not sealed.",
format_timespan(c, sizeof(c), total));
else
log_info("=> No sealing yet, no entries in file.");
}
}
}
return r;
}
int main(int argc, char *argv[]) {
int r;
sd_journal *j = NULL;
unsigned line = 0;
bool need_seek = false;
sd_id128_t previous_boot_id;
bool previous_boot_id_valid = false;
bool have_pager;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r <= 0)
goto finish;
if (arg_action == ACTION_NEW_ID128) {
r = generate_new_id128();
goto finish;
}
if (arg_action == ACTION_SETUP_KEYS) {
r = setup_keys();
goto finish;
}
if (arg_directory)
r = sd_journal_open_directory(&j, arg_directory, 0);
else
r = sd_journal_open(&j, arg_merge ? 0 : SD_JOURNAL_LOCAL_ONLY);
if (r < 0) {
log_error("Failed to open journal: %s", strerror(-r));
goto finish;
}
if (arg_action == ACTION_VERIFY) {
r = verify(j);
goto finish;
}
if (arg_action == ACTION_PRINT_HEADER) {
journal_print_header(j);
r = 0;
goto finish;
}
#ifdef HAVE_ACL
if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("adm") <= 0) {
log_error("Unprivileged users can't see messages unless persistent log storage is enabled. Users in the group 'adm' can always see messages.");
r = -EACCES;
goto finish;
}
if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0)
log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this notice off.");
#else
if (geteuid() != 0 && in_group("adm") <= 0) {
log_error("No access to messages. Only users in the group 'adm' can see messages.");
r = -EACCES;
goto finish;
}
#endif
r = add_this_boot(j);
if (r < 0)
goto finish;
r = add_matches(j, argv + optind);
if (r < 0)
goto finish;
r = add_priorities(j);
if (r < 0)
goto finish;
if (!arg_quiet) {
usec_t start, end;
char start_buf[FORMAT_TIMESTAMP_MAX], end_buf[FORMAT_TIMESTAMP_MAX];
r = sd_journal_get_cutoff_realtime_usec(j, &start, &end);
if (r < 0) {
log_error("Failed to get cutoff: %s", strerror(-r));
goto finish;
}
if (r > 0) {
if (arg_follow)
printf("Logs begin at %s.\n", format_timestamp(start_buf, sizeof(start_buf), start));
else
printf("Logs begin at %s, end at %s.\n",
format_timestamp(start_buf, sizeof(start_buf), start),
format_timestamp(end_buf, sizeof(end_buf), end));
}
}
if (arg_lines >= 0) {
r = sd_journal_seek_tail(j);
if (r < 0) {
log_error("Failed to seek to tail: %s", strerror(-r));
goto finish;
}
r = sd_journal_previous_skip(j, arg_lines);
} else {
r = sd_journal_seek_head(j);
if (r < 0) {
log_error("Failed to seek to head: %s", strerror(-r));
goto finish;
}
r = sd_journal_next(j);
}
if (r < 0) {
log_error("Failed to iterate through journal: %s", strerror(-r));
goto finish;
}
on_tty();
have_pager = !arg_no_pager && !arg_follow && pager_open();
for (;;) {
for (;;) {
sd_id128_t boot_id;
int flags =
arg_show_all * OUTPUT_SHOW_ALL |
have_pager * OUTPUT_FULL_WIDTH |
on_tty() * OUTPUT_COLOR;
if (need_seek) {
r = sd_journal_next(j);
if (r < 0) {
log_error("Failed to iterate through journal: %s", strerror(-r));
goto finish;
}
}
if (r == 0)
break;
r = sd_journal_get_monotonic_usec(j, NULL, &boot_id);
if (r >= 0) {
if (previous_boot_id_valid &&
!sd_id128_equal(boot_id, previous_boot_id))
printf(ANSI_HIGHLIGHT_ON "----- Reboot -----" ANSI_HIGHLIGHT_OFF "\n");
previous_boot_id = boot_id;
previous_boot_id_valid = true;
}
line ++;
r = output_journal(j, arg_output, line, 0, flags);
if (r < 0)
goto finish;
need_seek = true;
}
if (!arg_follow)
break;
r = sd_journal_wait(j, (uint64_t) -1);
if (r < 0) {
log_error("Couldn't wait for log event: %s", strerror(-r));
goto finish;
}
}
finish:
if (j)
sd_journal_close(j);
pager_close();
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}