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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "chattr-util.h"
#include "fd-util.h"
#include "io-util.h"
#include "journal-verify.h"
#include "log.h"
#include "managed-journal-file.h"
#include "mmap-cache.h"
#include "rm-rf.h"
#include "strv.h"
#include "terminal-util.h"
#include "tests.h"
#define N_ENTRIES 6000
#define RANDOM_RANGE 77
static void bit_toggle(const char *fn, uint64_t p) {
uint8_t b;
ssize_t r;
int fd;
fd = open(fn, O_RDWR|O_CLOEXEC);
assert_se(fd >= 0);
r = pread(fd, &b, 1, p/8);
assert_se(r == 1);
b ^= 1 << (p % 8);
r = pwrite(fd, &b, 1, p/8);
assert_se(r == 1);
safe_close(fd);
}
static int raw_verify(const char *fn, const char *verification_key) {
_cleanup_(mmap_cache_unrefp) MMapCache *m = NULL;
JournalFile *f;
int r;
m = mmap_cache_new();
assert_se(m != NULL);
r = journal_file_open(
/* fd= */ -1,
fn,
O_RDONLY,
JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL : 0),
0666,
/* compress_threshold_bytes= */ UINT64_MAX,
/* metrics= */ NULL,
m,
/* template= */ NULL,
&f);
if (r < 0)
return r;
r = journal_file_verify(f, verification_key, NULL, NULL, NULL, false);
(void) journal_file_close(f);
return r;
}
static int run_test(const char *verification_key, ssize_t max_iterations) {
_cleanup_(mmap_cache_unrefp) MMapCache *m = NULL;
char t[] = "/var/tmp/journal-XXXXXX";
struct stat st;
JournalFile *f;
ManagedJournalFile *df;
usec_t from = 0, to = 0, total = 0;
uint64_t start, end;
int r;
m = mmap_cache_new();
assert_se(m != NULL);
/* managed_journal_file_open requires a valid machine id */
if (sd_id128_get_machine(NULL) < 0)
return log_tests_skipped("No valid machine ID found");
test_setup_logging(LOG_DEBUG);
assert_se(mkdtemp(t));
assert_se(chdir(t) >= 0);
(void) chattr_path(t, FS_NOCOW_FL, FS_NOCOW_FL, NULL);
log_info("Generating a test journal");
assert_se(managed_journal_file_open(
/* fd= */ -1,
"test.journal",
O_RDWR|O_CREAT,
JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL : 0),
0666,
/* compress_threshold_bytes= */ UINT64_MAX,
/* metrics= */ NULL,
m,
/* deferred_closes= */ NULL,
/* template= */ NULL,
&df) == 0);
for (size_t n = 0; n < N_ENTRIES; n++) {
_cleanup_free_ char *test = NULL;
struct iovec iovec;
struct dual_timestamp ts;
dual_timestamp_get(&ts);
assert_se(asprintf(&test, "RANDOM=%li", random() % RANDOM_RANGE));
iovec = IOVEC_MAKE_STRING(test);
assert_se(journal_file_append_entry(
df->file,
&ts,
/* boot_id= */ NULL,
&iovec,
/* n_iovec= */ 1,
/* seqnum= */ NULL,
/* seqnum_id= */ NULL,
/* ret_object= */ NULL,
/* ret_offset= */ NULL) == 0);
}
(void) managed_journal_file_close(df);
log_info("Verifying with key: %s", strna(verification_key));
assert_se(journal_file_open(
/* fd= */ -1,
"test.journal",
O_RDONLY,
JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL : 0),
0666,
/* compress_threshold_bytes= */ UINT64_MAX,
/* metrics= */ NULL,
m,
/* template= */ NULL,
&f) == 0);
journal_file_print_header(f);
journal_file_dump(f);
assert_se(journal_file_verify(f, verification_key, &from, &to, &total, true) >= 0);
if (verification_key && JOURNAL_HEADER_SEALED(f->header))
log_info("=> Validated from %s to %s, %s missing",
FORMAT_TIMESTAMP(from),
FORMAT_TIMESTAMP(to),
FORMAT_TIMESPAN(total > to ? total - to : 0, 0));
(void) journal_file_close(f);
assert_se(stat("test.journal", &st) >= 0);
start = 38448 * 8 + 0;
end = max_iterations < 0 ? (uint64_t)st.st_size * 8 : start + max_iterations;
log_info("Toggling bits %"PRIu64 " to %"PRIu64, start, end);
for (uint64_t p = start; p < end; p++) {
bit_toggle("test.journal", p);
if (max_iterations < 0)
log_info("[ %"PRIu64"+%"PRIu64"]", p / 8, p % 8);
r = raw_verify("test.journal", verification_key);
/* Suppress the notice when running in the limited (CI) mode */
if (verification_key && max_iterations < 0 && r >= 0)
log_notice(ANSI_HIGHLIGHT_RED ">>>> %"PRIu64" (bit %"PRIu64") can be toggled without detection." ANSI_NORMAL, p / 8, p % 8);
bit_toggle("test.journal", p);
}
assert_se(rm_rf(t, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
return 0;
}
int main(int argc, char *argv[]) {
const char *verification_key = NULL;
int max_iterations = 512;
if (argc > 1) {
/* Don't limit the number of iterations when the verification key
* is provided on the command line, we want to do that only in CIs */
verification_key = argv[1];
max_iterations = -1;
}
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "0", 1) >= 0);
run_test(verification_key, max_iterations);
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "1", 1) >= 0);
run_test(verification_key, max_iterations);
#if HAVE_GCRYPT
/* If we're running without any arguments and we're compiled with gcrypt
* check the journal verification stuff with a valid key as well */
if (argc <= 1) {
verification_key = "c262bd-85187f-0b1b04-877cc5/1c7af8-35a4e900";
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "0", 1) >= 0);
run_test(verification_key, max_iterations);
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "1", 1) >= 0);
run_test(verification_key, max_iterations);
}
#endif
return 0;
}
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