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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 "terminal-util.h"
#include "tests.h"
#include "util.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(-1, fn, O_RDONLY, JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL : 0), 0666, UINT64_MAX, NULL, m, 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(int argc, char *argv[]) {
_cleanup_(mmap_cache_unrefp) MMapCache *m = NULL;
char t[] = "/var/tmp/journal-XXXXXX";
unsigned n;
JournalFile *f;
ManagedJournalFile *df;
const char *verification_key = argv[1];
usec_t from = 0, to = 0, total = 0;
struct stat st;
uint64_t p;
m = mmap_cache_new();
assert_se(m != NULL);
/* managed_journal_file_open requires a valid machine id */
if (access("/etc/machine-id", F_OK) != 0)
return log_tests_skipped("/etc/machine-id not 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...");
assert_se(managed_journal_file_open(-1, "test.journal", O_RDWR|O_CREAT, JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL : 0), 0666, UINT64_MAX, NULL, m, NULL, NULL, &df) == 0);
for (n = 0; n < N_ENTRIES; n++) {
struct iovec iovec;
struct dual_timestamp ts;
char *test;
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, NULL, &iovec, 1, NULL, NULL, NULL) == 0);
free(test);
}
(void) managed_journal_file_close(df);
log_info("Verifying...");
assert_se(journal_file_open(-1, "test.journal", O_RDONLY, JOURNAL_COMPRESS|(verification_key ? JOURNAL_SEAL: 0), 0666, UINT64_MAX, NULL, m, 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);
if (verification_key) {
log_info("Toggling bits...");
assert_se(stat("test.journal", &st) >= 0);
for (p = 38448*8+0; p < ((uint64_t) st.st_size * 8); p ++) {
bit_toggle("test.journal", p);
log_info("[ %"PRIu64"+%"PRIu64"]", p / 8, p % 8);
if (raw_verify("test.journal", verification_key) >= 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);
}
}
log_info("Exiting...");
assert_se(rm_rf(t, REMOVE_ROOT|REMOVE_PHYSICAL) >= 0);
return 0;
}
int main(int argc, char *argv[]) {
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "0", 1) >= 0);
run_test(argc, argv);
assert_se(setenv("SYSTEMD_JOURNAL_COMPACT", "1", 1) >= 0);
run_test(argc, argv);
return 0;
}
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