/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2012 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 <http://www.gnu.org/licenses/>. ***/ #include <stdio.h> #include <unistd.h> #include <fcntl.h> #include "util.h" #include "log.h" #include "journal-file.h" #include "journal-verify.h" #include "journal-authenticate.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(fd >= 0); r = pread(fd, &b, 1, p/8); assert(r == 1); b ^= 1 << (p % 8); r = pwrite(fd, &b, 1, p/8); assert(r == 1); close_nointr_nofail(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; 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)); } 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("[ %llu+%llu]", (unsigned long long) p / 8, (unsigned long long) p % 8); if (raw_verify("test.journal", verification_key) >= 0) log_notice(ANSI_HIGHLIGHT_RED_ON ">>>> %llu (bit %llu) can be toggled without detection." ANSI_HIGHLIGHT_OFF, (unsigned long long) p / 8, (unsigned long long) p % 8); bit_toggle("test.journal", p); } } log_info("Exiting..."); assert_se(rm_rf_dangerous(t, false, true, false) >= 0); return 0; }