journal: automatically evolve FSS key even when nothing is logged

1 files changed, 19 insertions, 0 deletions

diff --git a/src/journal/journal-authenticate.c b/src/journal/journal-authenticate.c
index 435481000d..fd81797cf9 100644
--- a/src/journal/journal-authenticate.c
+++ b/src/journal/journal-authenticate.c
@@ -211,6 +211,9 @@ int journal_file_maybe_append_tag(JournalFile *f, uint64_t realtime) {
         if (!f->seal)
                 return 0;
 
+        if (realtime <= 0)
+                realtime = now(CLOCK_MONOTONIC);
+
         r = journal_file_fsprg_need_evolve(f, realtime);
         if (r <= 0)
                 return 0;
@@ -517,3 +520,19 @@ int journal_file_parse_verification_key(JournalFile *f, const char *key) {
 
         return 0;
 }
+
+bool journal_file_next_evolve_usec(JournalFile *f, usec_t *u) {
+        uint64_t epoch;
+
+        assert(f);
+        assert(u);
+
+        if (!f->seal)
+                return false;
+
+        epoch = FSPRG_GetEpoch(f->fsprg_state);
+
+        *u = (usec_t) (f->fss_start_usec + f->fss_interval_usec * epoch + f->fss_interval_usec);
+
+        return true;
+}