chiark / gitweb /
manager: add DefaultEnvironment option
[elogind.git] / src / journal / journal-verify.c
index 55ca52a64138c15f4b5c73c70db11f5a4b49d9ad..01c89bc8a427f07a5969ab1b6fd3627de2b446d2 100644 (file)
@@ -22,6 +22,7 @@
 #include <unistd.h>
 #include <sys/mman.h>
 #include <fcntl.h>
+#include <stddef.h>
 
 #include "util.h"
 #include "macro.h"
 #include "journal-verify.h"
 #include "lookup3.h"
 #include "compress.h"
-
-/* FIXME:
- *
- * - verify FSPRG
- * - Allow building without libgcrypt
- * - check with sparse
- * - 64bit conversions
- *
- * */
+#include "fsprg.h"
 
 static int journal_file_object_verify(JournalFile *f, Object *o) {
+        uint64_t i;
+
         assert(f);
         assert(o);
 
@@ -68,28 +63,42 @@ static int journal_file_object_verify(JournalFile *f, Object *o) {
                 h1 = le64toh(o->data.hash);
 
                 if (o->object.flags & OBJECT_COMPRESSED) {
+#ifdef HAVE_XZ
                         void *b = NULL;
                         uint64_t alloc = 0, b_size;
 
                         if (!uncompress_blob(o->data.payload,
                                              le64toh(o->object.size) - offsetof(Object, data.payload),
-                                             &b, &alloc, &b_size))
+                                             &b, &alloc, &b_size, 0))
                                 return -EBADMSG;
 
                         h2 = hash64(b, b_size);
                         free(b);
+#else
+                        return -EPROTONOSUPPORT;
+#endif
                 } else
                         h2 = hash64(o->data.payload, le64toh(o->object.size) - offsetof(Object, data.payload));
 
                 if (h1 != h2)
                         return -EBADMSG;
 
+                if (!VALID64(o->data.next_hash_offset) ||
+                    !VALID64(o->data.next_field_offset) ||
+                    !VALID64(o->data.entry_offset) ||
+                    !VALID64(o->data.entry_array_offset))
+                        return -EBADMSG;
+
                 break;
         }
 
         case OBJECT_FIELD:
                 if (le64toh(o->object.size) - offsetof(FieldObject, payload) <= 0)
                         return -EBADMSG;
+
+                if (!VALID64(o->field.next_hash_offset) ||
+                    !VALID64(o->field.head_data_offset))
+                        return -EBADMSG;
                 break;
 
         case OBJECT_ENTRY:
@@ -100,9 +109,16 @@ static int journal_file_object_verify(JournalFile *f, Object *o) {
                         return -EBADMSG;
 
                 if (le64toh(o->entry.seqnum) <= 0 ||
-                    le64toh(o->entry.realtime) <= 0)
+                    !VALID_REALTIME(le64toh(o->entry.realtime)) ||
+                    !VALID_MONOTONIC(le64toh(o->entry.monotonic)))
                         return -EBADMSG;
 
+                for (i = 0; i < journal_file_entry_n_items(o); i++) {
+                        if (o->entry.items[i].object_offset == 0 ||
+                            !VALID64(o->entry.items[i].object_offset))
+                                return -EBADMSG;
+                }
+
                 break;
 
         case OBJECT_DATA_HASH_TABLE:
@@ -113,6 +129,19 @@ static int journal_file_object_verify(JournalFile *f, Object *o) {
                 if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) / sizeof(HashItem) <= 0)
                         return -EBADMSG;
 
+                for (i = 0; i < journal_file_hash_table_n_items(o); i++) {
+                        if (o->hash_table.items[i].head_hash_offset != 0 &&
+                            !VALID64(le64toh(o->hash_table.items[i].head_hash_offset)))
+                                return -EBADMSG;
+                        if (o->hash_table.items[i].tail_hash_offset != 0 &&
+                            !VALID64(le64toh(o->hash_table.items[i].tail_hash_offset)))
+                                return -EBADMSG;
+
+                        if ((o->hash_table.items[i].head_hash_offset != 0) !=
+                            (o->hash_table.items[i].tail_hash_offset != 0))
+                                return -EBADMSG;
+                }
+
                 break;
 
         case OBJECT_ENTRY_ARRAY:
@@ -122,11 +151,23 @@ static int journal_file_object_verify(JournalFile *f, Object *o) {
                 if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) / sizeof(le64_t) <= 0)
                         return -EBADMSG;
 
+                if (!VALID64(o->entry_array.next_entry_array_offset))
+                        return -EBADMSG;
+
+                for (i = 0; i < journal_file_entry_array_n_items(o); i++)
+                        if (o->entry_array.items[i] != 0 &&
+                            !VALID64(o->entry_array.items[i]))
+                                return -EBADMSG;
+
                 break;
 
         case OBJECT_TAG:
                 if (le64toh(o->object.size) != sizeof(TagObject))
                         return -EBADMSG;
+
+                if (!VALID_EPOCH(o->tag.epoch))
+                        return -EBADMSG;
+
                 break;
         }
 
@@ -137,7 +178,7 @@ static void draw_progress(uint64_t p, usec_t *last_usec) {
         unsigned n, i, j, k;
         usec_t z, x;
 
-        if (!isatty(STDOUT_FILENO))
+        if (!on_tty())
                 return;
 
         z = now(CLOCK_MONOTONIC);
@@ -162,7 +203,7 @@ static void draw_progress(uint64_t p, usec_t *last_usec) {
         for (i = 0; i < k; i++)
                 fputs("\xe2\x96\x91", stdout);
 
-        printf(" %3lu%%", 100LU * (unsigned long) p / 65535LU);
+        printf(" %3"PRIu64"%%", 100U * p / 65535U);
 
         fputs("\r\x1B[?25h", stdout);
         fflush(stdout);
@@ -171,7 +212,7 @@ static void draw_progress(uint64_t p, usec_t *last_usec) {
 static void flush_progress(void) {
         unsigned n, i;
 
-        if (!isatty(STDOUT_FILENO))
+        if (!on_tty())
                 return;
 
         n = (3 * columns()) / 4;
@@ -212,13 +253,16 @@ static int contains_uint64(MMapCache *m, int fd, uint64_t n, uint64_t p) {
 
                 c = (a + b) / 2;
 
-                r = mmap_cache_get(m, fd, PROT_READ|PROT_WRITE, 0, c * sizeof(uint64_t), sizeof(uint64_t), (void **) &z);
+                r = mmap_cache_get(m, fd, PROT_READ|PROT_WRITE, 0, false, c * sizeof(uint64_t), sizeof(uint64_t), NULL, (void **) &z);
                 if (r < 0)
                         return r;
 
                 if (*z == p)
                         return 1;
 
+                if (a + 1 >= b)
+                        return 0;
+
                 if (p < *z)
                         b = c;
                 else
@@ -244,7 +288,7 @@ static int entry_points_to_data(
         assert(entry_fd >= 0);
 
         if (!contains_uint64(f->mmap, entry_fd, n_entries, entry_p)) {
-                log_error("Data object references invalid entry at %llu", (unsigned long long) data_p);
+                log_error("Data object references invalid entry at %"PRIu64, data_p);
                 return -EBADMSG;
         }
 
@@ -260,7 +304,7 @@ static int entry_points_to_data(
                 }
 
         if (!found) {
-                log_error("Data object not referenced by linked entry at %llu", (unsigned long long) data_p);
+                log_error("Data object not referenced by linked entry at %"PRIu64, data_p);
                 return -EBADMSG;
         }
 
@@ -268,23 +312,47 @@ static int entry_points_to_data(
          * main entry array has already been verified we can rely on
          * its consistency.*/
 
+        i = 0;
         n = le64toh(f->header->n_entries);
         a = le64toh(f->header->entry_array_offset);
-        i = 0;
 
         while (i < n) {
-                uint64_t m, j;
+                uint64_t m, u;
 
                 r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o);
                 if (r < 0)
                         return r;
 
                 m = journal_file_entry_array_n_items(o);
-                for (j = 0; i < n && j < m; i++, j++)
-                        if (le64toh(o->entry_array.items[j]) == entry_p)
-                                return 0;
+                u = MIN(n - i, m);
+
+                if (entry_p <= le64toh(o->entry_array.items[u-1])) {
+                        uint64_t x, y, z;
+
+                        x = 0;
+                        y = u;
+
+                        while (x < y) {
+                                z = (x + y) / 2;
+
+                                if (le64toh(o->entry_array.items[z]) == entry_p)
+                                        return 0;
+
+                                if (x + 1 >= y)
+                                        break;
 
-                a = le64toh(o->entry_array.next_entry_array_offset);;
+                                if (entry_p < le64toh(o->entry_array.items[z]))
+                                        y = z;
+                                else
+                                        x = z;
+                        }
+
+                        log_error("Entry object doesn't exist in main entry array at %"PRIu64, entry_p);
+                        return -EBADMSG;
+                }
+
+                i += u;
+                a = le64toh(o->entry_array.next_entry_array_offset);
         }
 
         return 0;
@@ -320,12 +388,12 @@ static int verify_data(
                 uint64_t next, m, j;
 
                 if (a == 0) {
-                        log_error("Array chain too short at %llu.", (unsigned long long) p);
+                        log_error("Array chain too short at %"PRIu64, p);
                         return -EBADMSG;
                 }
 
                 if (!contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, a)) {
-                        log_error("Invalid array at %llu.", (unsigned long long) p);
+                        log_error("Invalid array at %"PRIu64, p);
                         return -EBADMSG;
                 }
 
@@ -335,7 +403,7 @@ static int verify_data(
 
                 next = le64toh(o->entry_array.next_entry_array_offset);
                 if (next != 0 && next <= a) {
-                        log_error("Array chain has cycle at %llu.", (unsigned long long) p);
+                        log_error("Array chain has cycle at %"PRIu64, p);
                         return -EBADMSG;
                 }
 
@@ -344,7 +412,7 @@ static int verify_data(
 
                         q = le64toh(o->entry_array.items[j]);
                         if (q <= last) {
-                                log_error("Data object's entry array not sorted at %llu.", (unsigned long long) p);
+                                log_error("Data object's entry array not sorted at %"PRIu64, p);
                                 return -EBADMSG;
                         }
                         last = q;
@@ -370,7 +438,8 @@ static int verify_hash_table(
                 int data_fd, uint64_t n_data,
                 int entry_fd, uint64_t n_entries,
                 int entry_array_fd, uint64_t n_entry_arrays,
-                usec_t *last_usec) {
+                usec_t *last_usec,
+                bool show_progress) {
 
         uint64_t i, n;
         int r;
@@ -385,7 +454,8 @@ static int verify_hash_table(
         for (i = 0; i < n; i++) {
                 uint64_t last = 0, p;
 
-                draw_progress(0xC000 + (0x3FFF * i / n), last_usec);
+                if (show_progress)
+                        draw_progress(0xC000 + (0x3FFF * i / n), last_usec);
 
                 p = le64toh(f->data_hash_table[i].head_hash_offset);
                 while (p != 0) {
@@ -393,8 +463,8 @@ static int verify_hash_table(
                         uint64_t next;
 
                         if (!contains_uint64(f->mmap, data_fd, n_data, p)) {
-                                log_error("Invalid data object at hash entry %llu of %llu.",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                log_error("Invalid data object at hash entry %"PRIu64" of %"PRIu64,
+                                          i, n);
                                 return -EBADMSG;
                         }
 
@@ -404,14 +474,14 @@ static int verify_hash_table(
 
                         next = le64toh(o->data.next_hash_offset);
                         if (next != 0 && next <= p) {
-                                log_error("Hash chain has a cycle in hash entry %llu of %llu.",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                log_error("Hash chain has a cycle in hash entry %"PRIu64" of %"PRIu64,
+                                          i, n);
                                 return -EBADMSG;
                         }
 
                         if (le64toh(o->data.hash) % n != i) {
-                                log_error("Hash value mismatch in hash entry %llu of %llu.",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                log_error("Hash value mismatch in hash entry %"PRIu64" of %"PRIu64,
+                                          i, n);
                                 return -EBADMSG;
                         }
 
@@ -424,7 +494,7 @@ static int verify_hash_table(
                 }
 
                 if (last != le64toh(f->data_hash_table[i].tail_hash_offset)) {
-                        log_error("Tail hash pointer mismatch in hash table.");
+                        log_error("Tail hash pointer mismatch in hash table");
                         return -EBADMSG;
                 }
         }
@@ -478,8 +548,7 @@ static int verify_entry(
                 h = le64toh(o->entry.items[i].hash);
 
                 if (!contains_uint64(f->mmap, data_fd, n_data, q)) {
-                        log_error("Invalid data object at entry %llu.",
-                                  (unsigned long long) o);
+                        log_error("Invalid data object at entry %"PRIu64, p);
                                 return -EBADMSG;
                         }
 
@@ -488,8 +557,7 @@ static int verify_entry(
                         return r;
 
                 if (le64toh(u->data.hash) != h) {
-                        log_error("Hash mismatch for data object at entry %llu.",
-                                  (unsigned long long) p);
+                        log_error("Hash mismatch for data object at entry %"PRIu64, p);
                         return -EBADMSG;
                 }
 
@@ -497,8 +565,7 @@ static int verify_entry(
                 if (r < 0)
                         return r;
                 if (r == 0) {
-                        log_error("Data object missing from hash at entry %llu.",
-                                  (unsigned long long) p);
+                        log_error("Data object missing from hash at entry %"PRIu64, p);
                         return -EBADMSG;
                 }
         }
@@ -511,7 +578,8 @@ static int verify_entry_array(
                 int data_fd, uint64_t n_data,
                 int entry_fd, uint64_t n_entries,
                 int entry_array_fd, uint64_t n_entry_arrays,
-                usec_t *last_usec) {
+                usec_t *last_usec,
+                bool show_progress) {
 
         uint64_t i = 0, a, n, last = 0;
         int r;
@@ -528,17 +596,16 @@ static int verify_entry_array(
                 uint64_t next, m, j;
                 Object *o;
 
-                draw_progress(0x8000 + (0x3FFF * i / n), last_usec);
+                if (show_progress)
+                        draw_progress(0x8000 + (0x3FFF * i / n), last_usec);
 
                 if (a == 0) {
-                        log_error("Array chain too short at %llu of %llu.",
-                                  (unsigned long long) i, (unsigned long long) n);
+                        log_error("Array chain too short at %"PRIu64" of %"PRIu64, i, n);
                         return -EBADMSG;
                 }
 
                 if (!contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, a)) {
-                        log_error("Invalid array at %llu of %llu.",
-                                  (unsigned long long) i, (unsigned long long) n);
+                        log_error("Invalid array at %"PRIu64" of %"PRIu64, i, n);
                         return -EBADMSG;
                 }
 
@@ -548,8 +615,7 @@ static int verify_entry_array(
 
                 next = le64toh(o->entry_array.next_entry_array_offset);
                 if (next != 0 && next <= a) {
-                        log_error("Array chain has cycle at %llu of %llu.",
-                                  (unsigned long long) i, (unsigned long long) n);
+                        log_error("Array chain has cycle at %"PRIu64" of %"PRIu64, i, n);
                         return -EBADMSG;
                 }
 
@@ -559,15 +625,15 @@ static int verify_entry_array(
 
                         p = le64toh(o->entry_array.items[j]);
                         if (p <= last) {
-                                log_error("Entry array not sorted at %llu of %llu.",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                log_error("Entry array not sorted at %"PRIu64" of %"PRIu64,
+                                          i, n);
                                 return -EBADMSG;
                         }
                         last = p;
 
                         if (!contains_uint64(f->mmap, entry_fd, n_entries, p)) {
-                                log_error("Invalid array entry at %llu of %llu.",
-                                          (unsigned long long) i, (unsigned long long) n);
+                                log_error("Invalid array entry at %"PRIu64" of %"PRIu64,
+                                          i, n);
                                 return -EBADMSG;
                         }
 
@@ -591,22 +657,44 @@ static int verify_entry_array(
         return 0;
 }
 
-int journal_file_verify(JournalFile *f, const char *key) {
+int journal_file_verify(
+                JournalFile *f,
+                const char *key,
+                usec_t *first_contained, usec_t *last_validated, usec_t *last_contained,
+                bool show_progress) {
         int r;
         Object *o;
-        uint64_t p = 0;
-        uint64_t tag_seqnum = 0, entry_seqnum = 0, entry_monotonic = 0, entry_realtime = 0;
+        uint64_t p = 0, last_epoch = 0, last_tag_realtime = 0, last_sealed_realtime = 0;
+
+        uint64_t entry_seqnum = 0, entry_monotonic = 0, entry_realtime = 0;
         sd_id128_t entry_boot_id;
         bool entry_seqnum_set = false, entry_monotonic_set = false, entry_realtime_set = false, found_main_entry_array = false;
-        uint64_t n_weird = 0, n_objects = 0, n_entries = 0, n_data = 0, n_fields = 0, n_data_hash_tables = 0, n_field_hash_tables = 0, n_entry_arrays = 0;
+        uint64_t n_weird = 0, n_objects = 0, n_entries = 0, n_data = 0, n_fields = 0, n_data_hash_tables = 0, n_field_hash_tables = 0, n_entry_arrays = 0, n_tags = 0;
         usec_t last_usec = 0;
         int data_fd = -1, entry_fd = -1, entry_array_fd = -1;
         char data_path[] = "/var/tmp/journal-data-XXXXXX",
                 entry_path[] = "/var/tmp/journal-entry-XXXXXX",
                 entry_array_path[] = "/var/tmp/journal-entry-array-XXXXXX";
-
+        unsigned i;
+        bool found_last;
+#ifdef HAVE_GCRYPT
+        uint64_t last_tag = 0;
+#endif
         assert(f);
 
+        if (key) {
+#ifdef HAVE_GCRYPT
+                r = journal_file_parse_verification_key(f, key);
+                if (r < 0) {
+                        log_error("Failed to parse seed.");
+                        return r;
+                }
+#else
+                return -ENOTSUP;
+#endif
+        } else if (f->seal)
+                return -ENOKEY;
+
         data_fd = mkostemp(data_path, O_CLOEXEC);
         if (data_fd < 0) {
                 log_error("Failed to create data file: %m");
@@ -631,82 +719,102 @@ int journal_file_verify(JournalFile *f, const char *key) {
         }
         unlink(entry_array_path);
 
-        /* First iteration: we go through all objects, verify the
-         * superficial structure, headers, hashes. */
-
-        r = journal_file_hmac_put_header(f);
-        if (r < 0) {
-                log_error("Failed to calculate HMAC of header.");
+#ifdef HAVE_GCRYPT
+        if ((le32toh(f->header->compatible_flags) & ~HEADER_COMPATIBLE_SEALED) != 0)
+#else
+        if (f->header->compatible_flags != 0)
+#endif
+        {
+                log_error("Cannot verify file with unknown extensions.");
+                r = -ENOTSUP;
                 goto fail;
         }
 
+        for (i = 0; i < sizeof(f->header->reserved); i++)
+                if (f->header->reserved[i] != 0) {
+                        log_error("Reserved field in non-zero.");
+                        r = -EBADMSG;
+                        goto fail;
+                }
+
+        /* First iteration: we go through all objects, verify the
+         * superficial structure, headers, hashes. */
+
         p = le64toh(f->header->header_size);
         while (p != 0) {
-                draw_progress(0x7FFF * p / le64toh(f->header->tail_object_offset), &last_usec);
+                if (show_progress)
+                        draw_progress(0x7FFF * p / le64toh(f->header->tail_object_offset), &last_usec);
 
                 r = journal_file_move_to_object(f, -1, p, &o);
                 if (r < 0) {
-                        log_error("Invalid object at %llu", (unsigned long long) p);
+                        log_error("Invalid object at %"PRIu64, p);
                         goto fail;
                 }
 
-                if (le64toh(f->header->tail_object_offset) < p) {
-                        log_error("Invalid tail object pointer.");
+                if (p > le64toh(f->header->tail_object_offset)) {
+                        log_error("Invalid tail object pointer");
                         r = -EBADMSG;
                         goto fail;
                 }
 
+                if (p == le64toh(f->header->tail_object_offset))
+                        found_last = true;
+
                 n_objects ++;
 
                 r = journal_file_object_verify(f, o);
                 if (r < 0) {
-                        log_error("Invalid object contents at %llu", (unsigned long long) p);
+                        log_error("Invalid object contents at %"PRIu64, p);
                         goto fail;
                 }
 
-                if (o->object.flags & OBJECT_COMPRESSED &&
-                    !(le32toh(f->header->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED)) {
-                        log_error("Compressed object without compression at %llu", (unsigned long long) p);
+                if ((o->object.flags & OBJECT_COMPRESSED) && !JOURNAL_HEADER_COMPRESSED(f->header)) {
+                        log_error("Compressed object in file without compression at %"PRIu64, p);
                         r = -EBADMSG;
                         goto fail;
                 }
 
-                r = journal_file_hmac_put_object(f, -1, p);
-                if (r < 0) {
-                        log_error("Failed to calculate HMAC at %llu", (unsigned long long) p);
-                        goto fail;
-                }
-
-                if (o->object.type == OBJECT_TAG) {
+                switch (o->object.type) {
 
-                        if (!(le32toh(f->header->compatible_flags) & HEADER_COMPATIBLE_AUTHENTICATED)) {
-                                log_error("Tag object without authentication at %llu", (unsigned long long) p);
-                                r = -EBADMSG;
+                case OBJECT_DATA:
+                        r = write_uint64(data_fd, p);
+                        if (r < 0)
                                 goto fail;
-                        }
 
-                        if (le64toh(o->tag.seqnum) != tag_seqnum) {
-                                log_error("Tag sequence number out of synchronization at %llu", (unsigned long long) p);
+                        n_data++;
+                        break;
+
+                case OBJECT_FIELD:
+                        n_fields++;
+                        break;
+
+                case OBJECT_ENTRY:
+                        if (JOURNAL_HEADER_SEALED(f->header) && n_tags <= 0) {
+                                log_error("First entry before first tag at %"PRIu64, p);
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
-                } else if (o->object.type == OBJECT_ENTRY) {
-
                         r = write_uint64(entry_fd, p);
                         if (r < 0)
                                 goto fail;
 
+                        if (le64toh(o->entry.realtime) < last_tag_realtime) {
+                                log_error("Older entry after newer tag at %"PRIu64, p);
+                                r = -EBADMSG;
+                                goto fail;
+                        }
+
                         if (!entry_seqnum_set &&
                             le64toh(o->entry.seqnum) != le64toh(f->header->head_entry_seqnum)) {
-                                log_error("Head entry sequence number incorrect");
+                                log_error("Head entry sequence number incorrect at %"PRIu64, p);
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
                         if (entry_seqnum_set &&
                             entry_seqnum >= le64toh(o->entry.seqnum)) {
-                                log_error("Entry sequence number out of synchronization at %llu", (unsigned long long) p);
+                                log_error("Entry sequence number out of synchronization at %"PRIu64, p);
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -717,7 +825,7 @@ int journal_file_verify(JournalFile *f, const char *key) {
                         if (entry_monotonic_set &&
                             sd_id128_equal(entry_boot_id, o->entry.boot_id) &&
                             entry_monotonic > le64toh(o->entry.monotonic)) {
-                                log_error("Entry timestamp out of synchronization at %llu", (unsigned long long) p);
+                                log_error("Entry timestamp out of synchronization at %"PRIu64, p);
                                 r = -EBADMSG;
                                 goto fail;
                         }
@@ -737,15 +845,50 @@ int journal_file_verify(JournalFile *f, const char *key) {
                         entry_realtime_set = true;
 
                         n_entries ++;
-                } else if (o->object.type == OBJECT_ENTRY_ARRAY) {
+                        break;
+
+                case OBJECT_DATA_HASH_TABLE:
+                        if (n_data_hash_tables > 1) {
+                                log_error("More than one data hash table at %"PRIu64, p);
+                                r = -EBADMSG;
+                                goto fail;
+                        }
 
+                        if (le64toh(f->header->data_hash_table_offset) != p + offsetof(HashTableObject, items) ||
+                            le64toh(f->header->data_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) {
+                                log_error("Header fields for data hash table invalid");
+                                r = -EBADMSG;
+                                goto fail;
+                        }
+
+                        n_data_hash_tables++;
+                        break;
+
+                case OBJECT_FIELD_HASH_TABLE:
+                        if (n_field_hash_tables > 1) {
+                                log_error("More than one field hash table at %"PRIu64, p);
+                                r = -EBADMSG;
+                                goto fail;
+                        }
+
+                        if (le64toh(f->header->field_hash_table_offset) != p + offsetof(HashTableObject, items) ||
+                            le64toh(f->header->field_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) {
+                                log_error("Header fields for field hash table invalid");
+                                r = -EBADMSG;
+                                goto fail;
+                        }
+
+                        n_field_hash_tables++;
+                        break;
+
+                case OBJECT_ENTRY_ARRAY:
                         r = write_uint64(entry_array_fd, p);
                         if (r < 0)
                                 goto fail;
 
                         if (p == le64toh(f->header->entry_array_offset)) {
                                 if (found_main_entry_array) {
-                                        log_error("More than one main entry array at %llu", (unsigned long long) p);
+                                        log_error("More than one main entry array at %"PRIu64, p);
                                         r = -EBADMSG;
                                         goto fail;
                                 }
@@ -754,49 +897,99 @@ int journal_file_verify(JournalFile *f, const char *key) {
                         }
 
                         n_entry_arrays++;
+                        break;
 
-                } else if (o->object.type == OBJECT_DATA) {
-
-                        r = write_uint64(data_fd, p);
-                        if (r < 0)
-                                goto fail;
-
-                        n_data++;
-
-                } else if (o->object.type == OBJECT_FIELD)
-                        n_fields++;
-                else if (o->object.type == OBJECT_DATA_HASH_TABLE) {
-                        n_data_hash_tables++;
-
-                        if (n_data_hash_tables > 1) {
-                                log_error("More than one data hash table at %llu", (unsigned long long) p);
+                case OBJECT_TAG:
+                        if (!JOURNAL_HEADER_SEALED(f->header)) {
+                                log_error("Tag object in file without sealing at %"PRIu64, p);
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
-                        if (le64toh(f->header->data_hash_table_offset) != p + offsetof(HashTableObject, items) ||
-                            le64toh(f->header->data_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) {
-                                log_error("Header fields for data hash table invalid.");
+                        if (le64toh(o->tag.seqnum) != n_tags + 1) {
+                                log_error("Tag sequence number out of synchronization at %"PRIu64, p);
                                 r = -EBADMSG;
                                 goto fail;
                         }
-                } else if (o->object.type == OBJECT_FIELD_HASH_TABLE) {
-                        n_field_hash_tables++;
 
-                        if (n_field_hash_tables > 1) {
-                                log_error("More than one field hash table at %llu", (unsigned long long) p);
+                        if (le64toh(o->tag.epoch) < last_epoch) {
+                                log_error("Epoch sequence out of synchronization at %"PRIu64, p);
                                 r = -EBADMSG;
                                 goto fail;
                         }
 
-                        if (le64toh(f->header->field_hash_table_offset) != p + offsetof(HashTableObject, items) ||
-                            le64toh(f->header->field_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) {
-                                log_error("Header fields for field hash table invalid.");
-                                r = -EBADMSG;
-                                goto fail;
+#ifdef HAVE_GCRYPT
+                        if (f->seal) {
+                                uint64_t q, rt;
+
+                                log_debug("Checking tag %"PRIu64"...", le64toh(o->tag.seqnum));
+
+                                rt = f->fss_start_usec + o->tag.epoch * f->fss_interval_usec;
+                                if (entry_realtime_set && entry_realtime >= rt + f->fss_interval_usec) {
+                                        log_error("Tag/entry realtime timestamp out of synchronization at %"PRIu64, p);
+                                        r = -EBADMSG;
+                                        goto fail;
+                                }
+
+                                /* OK, now we know the epoch. So let's now set
+                                 * it, and calculate the HMAC for everything
+                                 * since the last tag. */
+                                r = journal_file_fsprg_seek(f, le64toh(o->tag.epoch));
+                                if (r < 0)
+                                        goto fail;
+
+                                r = journal_file_hmac_start(f);
+                                if (r < 0)
+                                        goto fail;
+
+                                if (last_tag == 0) {
+                                        r = journal_file_hmac_put_header(f);
+                                        if (r < 0)
+                                                goto fail;
+
+                                        q = le64toh(f->header->header_size);
+                                } else
+                                        q = last_tag;
+
+                                while (q <= p) {
+                                        r = journal_file_move_to_object(f, -1, q, &o);
+                                        if (r < 0)
+                                                goto fail;
+
+                                        r = journal_file_hmac_put_object(f, -1, o, q);
+                                        if (r < 0)
+                                                goto fail;
+
+                                        q = q + ALIGN64(le64toh(o->object.size));
+                                }
+
+                                /* Position might have changed, let's reposition things */
+                                r = journal_file_move_to_object(f, -1, p, &o);
+                                if (r < 0)
+                                        goto fail;
+
+                                if (memcmp(o->tag.tag, gcry_md_read(f->hmac, 0), TAG_LENGTH) != 0) {
+                                        log_error("Tag failed verification at %"PRIu64, p);
+                                        r = -EBADMSG;
+                                        goto fail;
+                                }
+
+                                f->hmac_running = false;
+                                last_tag_realtime = rt;
+                                last_sealed_realtime = entry_realtime;
                         }
-                } else if (o->object.type >= _OBJECT_TYPE_MAX)
+
+                        last_tag = p + ALIGN64(le64toh(o->object.size));
+#endif
+
+                        last_epoch = le64toh(o->tag.epoch);
+
+                        n_tags ++;
+                        break;
+
+                default:
                         n_weird ++;
+                }
 
                 if (p == le64toh(f->header->tail_object_offset))
                         p = 0;
@@ -804,6 +997,12 @@ int journal_file_verify(JournalFile *f, const char *key) {
                         p = p + ALIGN64(le64toh(o->object.size));
         }
 
+        if (!found_last) {
+                log_error("Tail object pointer dead");
+                r = -EBADMSG;
+                goto fail;
+        }
+
         if (n_objects != le64toh(f->header->n_objects)) {
                 log_error("Object number mismatch");
                 r = -EBADMSG;
@@ -831,12 +1030,19 @@ int journal_file_verify(JournalFile *f, const char *key) {
         }
 
         if (JOURNAL_HEADER_CONTAINS(f->header, n_tags) &&
-            tag_seqnum != le64toh(f->header->n_tags)) {
+            n_tags != le64toh(f->header->n_tags)) {
                 log_error("Tag number mismatch");
                 r = -EBADMSG;
                 goto fail;
         }
 
+        if (JOURNAL_HEADER_CONTAINS(f->header, n_entry_arrays) &&
+            n_entry_arrays != le64toh(f->header->n_entry_arrays)) {
+                log_error("Entry array number mismatch");
+                r = -EBADMSG;
+                goto fail;
+        }
+
         if (n_data_hash_tables != 1) {
                 log_error("Missing data hash table");
                 r = -EBADMSG;
@@ -888,7 +1094,8 @@ int journal_file_verify(JournalFile *f, const char *key) {
                                data_fd, n_data,
                                entry_fd, n_entries,
                                entry_array_fd, n_entry_arrays,
-                               &last_usec);
+                               &last_usec,
+                               show_progress);
         if (r < 0)
                 goto fail;
 
@@ -896,11 +1103,13 @@ int journal_file_verify(JournalFile *f, const char *key) {
                               data_fd, n_data,
                               entry_fd, n_entries,
                               entry_array_fd, n_entry_arrays,
-                              &last_usec);
+                              &last_usec,
+                              show_progress);
         if (r < 0)
                 goto fail;
 
-        flush_progress();
+        if (show_progress)
+                flush_progress();
 
         mmap_cache_close_fd(f->mmap, data_fd);
         mmap_cache_close_fd(f->mmap, entry_fd);
@@ -910,16 +1119,24 @@ int journal_file_verify(JournalFile *f, const char *key) {
         close_nointr_nofail(entry_fd);
         close_nointr_nofail(entry_array_fd);
 
+        if (first_contained)
+                *first_contained = le64toh(f->header->head_entry_realtime);
+        if (last_validated)
+                *last_validated = last_sealed_realtime;
+        if (last_contained)
+                *last_contained = le64toh(f->header->tail_entry_realtime);
+
         return 0;
 
 fail:
-        flush_progress();
+        if (show_progress)
+                flush_progress();
 
-        log_error("File corruption detected at %s:%llu (of %llu, %llu%%).",
+        log_error("File corruption detected at %s:%"PRIu64" (of %llu bytes, %"PRIu64"%%).",
                   f->path,
-                  (unsigned long long) p,
+                  p,
                   (unsigned long long) f->last_stat.st_size,
-                  (unsigned long long) (100 * p / f->last_stat.st_size));
+                  100 * p / f->last_stat.st_size);
 
         if (data_fd >= 0) {
                 mmap_cache_close_fd(f->mmap, data_fd);