#include <fcntl.h>

#include <stdio.h>

#include <unistd.h>

#include "fd-util.h"

#include "journal-file.h"

#include "journal-verify.h"

#include "log.h"

#include "rm-rf.h"

#include "terminal-util.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) {

JournalFile *f;

int r;

r = journal_file_open(fn, O_RDONLY, 0666, true, !!verification_key, NULL, NULL, NULL, &f);

if (r < 0)

return r;

r = journal_file_verify(f, verification_key, NULL, NULL, NULL, false);

journal_file_close(f);

return r;

}

int main(int argc, char *argv[]) {

char t[] = "/tmp/journal-XXXXXX";

unsigned n;

JournalFile *f;

const char *verification_key = argv[1];

usec_t from = 0, to = 0, total = 0;

char a[FORMAT_TIMESTAMP_MAX];

char b[FORMAT_TIMESTAMP_MAX];

char c[FORMAT_TIMESPAN_MAX];

struct stat st;

uint64_t p;

/* journal_file_open requires a valid machine id */

if (access("/etc/machine-id", F_OK) != 0)

return EXIT_TEST_SKIP;

log_set_max_level(LOG_DEBUG);

assert_se(mkdtemp(t));

assert_se(chdir(t) >= 0);

log_info("Generating...");

assert_se(journal_file_open("test.journal", O_RDWR|O_CREAT, 0666, true, !!verification_key, NULL, NULL, NULL, &f) == 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=%lu", random() % RANDOM_RANGE));

iovec.iov_base = (void*) test;

iovec.iov_len = strlen(test);

assert_se(journal_file_append_entry(f, &ts, &iovec, 1, NULL, NULL, NULL) == 0);

free(test);

}

journal_file_close(f);

log_info("Verifying...");

assert_se(journal_file_open("test.journal", O_RDONLY, 0666, true, !!verification_key, NULL, NULL, 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(a, sizeof(a), from),

format_timestamp(b, sizeof(b), to),

format_timespan(c, sizeof(c), total > to ? total - to : 0, 0));

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;

}