1 files changed, 153 insertions, 0 deletions
diff --git a/src/journal/test-journal-verify.c b/src/journal/test-journal-verify.c
new file mode 100644
index 0000000..e36ea8c
--- /dev/null
+++ b/src/journal/test-journal-verify.c
@@ -0,0 +1,153 @@
+/* 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;
+}