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path: root/src/libsystemd/src/sd-journal/journal-verify.c
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-rw-r--r--src/libsystemd/src/sd-journal/journal-verify.c1314
1 files changed, 1314 insertions, 0 deletions
diff --git a/src/libsystemd/src/sd-journal/journal-verify.c b/src/libsystemd/src/sd-journal/journal-verify.c
new file mode 100644
index 0000000000..756dbdaa76
--- /dev/null
+++ b/src/libsystemd/src/sd-journal/journal-verify.c
@@ -0,0 +1,1314 @@
+/***
+ 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 <fcntl.h>
+#include <stddef.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fileio.h"
+#include "systemd-basic/fs-util.h"
+#include "systemd-basic/macro.h"
+#include "systemd-basic/terminal-util.h"
+#include "systemd-basic/util.h"
+
+#include "compress.h"
+#include "journal-authenticate.h"
+#include "journal-def.h"
+#include "journal-file.h"
+#include "journal-verify.h"
+#include "lookup3.h"
+
+static void draw_progress(uint64_t p, usec_t *last_usec) {
+ unsigned n, i, j, k;
+ usec_t z, x;
+
+ if (!on_tty())
+ return;
+
+ z = now(CLOCK_MONOTONIC);
+ x = *last_usec;
+
+ if (x != 0 && x + 40 * USEC_PER_MSEC > z)
+ return;
+
+ *last_usec = z;
+
+ n = (3 * columns()) / 4;
+ j = (n * (unsigned) p) / 65535ULL;
+ k = n - j;
+
+ fputs("\r", stdout);
+ if (colors_enabled())
+ fputs("\x1B[?25l" ANSI_HIGHLIGHT_GREEN, stdout);
+
+ for (i = 0; i < j; i++)
+ fputs("\xe2\x96\x88", stdout);
+
+ fputs(ANSI_NORMAL, stdout);
+
+ for (i = 0; i < k; i++)
+ fputs("\xe2\x96\x91", stdout);
+
+ printf(" %3"PRIu64"%%", 100U * p / 65535U);
+
+ fputs("\r", stdout);
+ if (colors_enabled())
+ fputs("\x1B[?25h", stdout);
+
+ fflush(stdout);
+}
+
+static uint64_t scale_progress(uint64_t scale, uint64_t p, uint64_t m) {
+
+ /* Calculates scale * p / m, but handles m == 0 safely, and saturates */
+
+ if (p >= m || m == 0)
+ return scale;
+
+ return scale * p / m;
+}
+
+static void flush_progress(void) {
+ unsigned n, i;
+
+ if (!on_tty())
+ return;
+
+ n = (3 * columns()) / 4;
+
+ putchar('\r');
+
+ for (i = 0; i < n + 5; i++)
+ putchar(' ');
+
+ putchar('\r');
+ fflush(stdout);
+}
+
+#define debug(_offset, _fmt, ...) do { \
+ flush_progress(); \
+ log_debug(OFSfmt": " _fmt, _offset, ##__VA_ARGS__); \
+ } while (0)
+
+#define warning(_offset, _fmt, ...) do { \
+ flush_progress(); \
+ log_warning(OFSfmt": " _fmt, _offset, ##__VA_ARGS__); \
+ } while (0)
+
+#define error(_offset, _fmt, ...) do { \
+ flush_progress(); \
+ log_error(OFSfmt": " _fmt, (uint64_t)_offset, ##__VA_ARGS__); \
+ } while (0)
+
+#define error_errno(_offset, error, _fmt, ...) do { \
+ flush_progress(); \
+ log_error_errno(error, OFSfmt": " _fmt, (uint64_t)_offset, ##__VA_ARGS__); \
+ } while (0)
+
+static int journal_file_object_verify(JournalFile *f, uint64_t offset, Object *o) {
+ uint64_t i;
+
+ assert(f);
+ assert(offset);
+ assert(o);
+
+ /* This does various superficial tests about the length an
+ * possible field values. It does not follow any references to
+ * other objects. */
+
+ if ((o->object.flags & OBJECT_COMPRESSED_XZ) &&
+ o->object.type != OBJECT_DATA) {
+ error(offset, "Found compressed object that isn't of type DATA, which is not allowed.");
+ return -EBADMSG;
+ }
+
+ switch (o->object.type) {
+
+ case OBJECT_DATA: {
+ uint64_t h1, h2;
+ int compression, r;
+
+ if (le64toh(o->data.entry_offset) == 0)
+ warning(offset, "Unused data (entry_offset==0)");
+
+ if ((le64toh(o->data.entry_offset) == 0) ^ (le64toh(o->data.n_entries) == 0)) {
+ error(offset, "Bad n_entries: %"PRIu64, o->data.n_entries);
+ return -EBADMSG;
+ }
+
+ if (le64toh(o->object.size) - offsetof(DataObject, payload) <= 0) {
+ error(offset, "Bad object size (<= %zu): %"PRIu64,
+ offsetof(DataObject, payload),
+ le64toh(o->object.size));
+ return -EBADMSG;
+ }
+
+ h1 = le64toh(o->data.hash);
+
+ compression = o->object.flags & OBJECT_COMPRESSION_MASK;
+ if (compression) {
+ _cleanup_free_ void *b = NULL;
+ size_t alloc = 0, b_size;
+
+ r = decompress_blob(compression,
+ o->data.payload,
+ le64toh(o->object.size) - offsetof(Object, data.payload),
+ &b, &alloc, &b_size, 0);
+ if (r < 0) {
+ error_errno(offset, r, "%s decompression failed: %m",
+ object_compressed_to_string(compression));
+ return r;
+ }
+
+ h2 = hash64(b, b_size);
+ } else
+ h2 = hash64(o->data.payload, le64toh(o->object.size) - offsetof(Object, data.payload));
+
+ if (h1 != h2) {
+ error(offset, "Invalid hash (%08"PRIx64" vs. %08"PRIx64, 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)) {
+ error(offset, "Invalid offset (next_hash_offset="OFSfmt", next_field_offset="OFSfmt", entry_offset="OFSfmt", entry_array_offset="OFSfmt,
+ o->data.next_hash_offset,
+ o->data.next_field_offset,
+ o->data.entry_offset,
+ o->data.entry_array_offset);
+ return -EBADMSG;
+ }
+
+ break;
+ }
+
+ case OBJECT_FIELD:
+ if (le64toh(o->object.size) - offsetof(FieldObject, payload) <= 0) {
+ error(offset,
+ "Bad field size (<= %zu): %"PRIu64,
+ offsetof(FieldObject, payload),
+ le64toh(o->object.size));
+ return -EBADMSG;
+ }
+
+ if (!VALID64(o->field.next_hash_offset) ||
+ !VALID64(o->field.head_data_offset)) {
+ error(offset,
+ "Invalid offset (next_hash_offset="OFSfmt", head_data_offset="OFSfmt,
+ o->field.next_hash_offset,
+ o->field.head_data_offset);
+ return -EBADMSG;
+ }
+ break;
+
+ case OBJECT_ENTRY:
+ if ((le64toh(o->object.size) - offsetof(EntryObject, items)) % sizeof(EntryItem) != 0) {
+ error(offset,
+ "Bad entry size (<= %zu): %"PRIu64,
+ offsetof(EntryObject, items),
+ le64toh(o->object.size));
+ return -EBADMSG;
+ }
+
+ if ((le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem) <= 0) {
+ error(offset,
+ "Invalid number items in entry: %"PRIu64,
+ (le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem));
+ return -EBADMSG;
+ }
+
+ if (le64toh(o->entry.seqnum) <= 0) {
+ error(offset,
+ "Invalid entry seqnum: %"PRIx64,
+ le64toh(o->entry.seqnum));
+ return -EBADMSG;
+ }
+
+ if (!VALID_REALTIME(le64toh(o->entry.realtime))) {
+ error(offset,
+ "Invalid entry realtime timestamp: %"PRIu64,
+ le64toh(o->entry.realtime));
+ return -EBADMSG;
+ }
+
+ if (!VALID_MONOTONIC(le64toh(o->entry.monotonic))) {
+ error(offset,
+ "Invalid entry monotonic timestamp: %"PRIu64,
+ 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)) {
+ error(offset,
+ "Invalid entry item (%"PRIu64"/%"PRIu64" offset: "OFSfmt,
+ i, journal_file_entry_n_items(o),
+ o->entry.items[i].object_offset);
+ return -EBADMSG;
+ }
+ }
+
+ break;
+
+ case OBJECT_DATA_HASH_TABLE:
+ case OBJECT_FIELD_HASH_TABLE:
+ if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) % sizeof(HashItem) != 0 ||
+ (le64toh(o->object.size) - offsetof(HashTableObject, items)) / sizeof(HashItem) <= 0) {
+ error(offset,
+ "Invalid %s hash table size: %"PRIu64,
+ o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+ le64toh(o->object.size));
+ 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))) {
+ error(offset,
+ "Invalid %s hash table item (%"PRIu64"/%"PRIu64") head_hash_offset: "OFSfmt,
+ o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+ i, journal_file_hash_table_n_items(o),
+ 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))) {
+ error(offset,
+ "Invalid %s hash table item (%"PRIu64"/%"PRIu64") tail_hash_offset: "OFSfmt,
+ o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+ i, journal_file_hash_table_n_items(o),
+ 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)) {
+ error(offset,
+ "Invalid %s hash table item (%"PRIu64"/%"PRIu64"): head_hash_offset="OFSfmt" tail_hash_offset="OFSfmt,
+ o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+ i, journal_file_hash_table_n_items(o),
+ le64toh(o->hash_table.items[i].head_hash_offset),
+ le64toh(o->hash_table.items[i].tail_hash_offset));
+ return -EBADMSG;
+ }
+ }
+
+ break;
+
+ case OBJECT_ENTRY_ARRAY:
+ if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) % sizeof(le64_t) != 0 ||
+ (le64toh(o->object.size) - offsetof(EntryArrayObject, items)) / sizeof(le64_t) <= 0) {
+ error(offset,
+ "Invalid object entry array size: %"PRIu64,
+ le64toh(o->object.size));
+ return -EBADMSG;
+ }
+
+ if (!VALID64(o->entry_array.next_entry_array_offset)) {
+ error(offset,
+ "Invalid object entry array next_entry_array_offset: "OFSfmt,
+ o->entry_array.next_entry_array_offset);
+ return -EBADMSG;
+ }
+
+ for (i = 0; i < journal_file_entry_array_n_items(o); i++)
+ if (le64toh(o->entry_array.items[i]) != 0 &&
+ !VALID64(le64toh(o->entry_array.items[i]))) {
+ error(offset,
+ "Invalid object entry array item (%"PRIu64"/%"PRIu64"): "OFSfmt,
+ i, journal_file_entry_array_n_items(o),
+ le64toh(o->entry_array.items[i]));
+ return -EBADMSG;
+ }
+
+ break;
+
+ case OBJECT_TAG:
+ if (le64toh(o->object.size) != sizeof(TagObject)) {
+ error(offset,
+ "Invalid object tag size: %"PRIu64,
+ le64toh(o->object.size));
+ return -EBADMSG;
+ }
+
+ if (!VALID_EPOCH(o->tag.epoch)) {
+ error(offset,
+ "Invalid object tag epoch: %"PRIu64,
+ o->tag.epoch);
+ return -EBADMSG;
+ }
+
+ break;
+ }
+
+ return 0;
+}
+
+static int write_uint64(int fd, uint64_t p) {
+ ssize_t k;
+
+ k = write(fd, &p, sizeof(p));
+ if (k < 0)
+ return -errno;
+ if (k != sizeof(p))
+ return -EIO;
+
+ return 0;
+}
+
+static int contains_uint64(MMapCache *m, int fd, uint64_t n, uint64_t p) {
+ uint64_t a, b;
+ int r;
+
+ assert(m);
+ assert(fd >= 0);
+
+ /* Bisection ... */
+
+ a = 0; b = n;
+ while (a < b) {
+ uint64_t c, *z;
+
+ c = (a + b) / 2;
+
+ 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
+ a = c;
+ }
+
+ return 0;
+}
+
+static int entry_points_to_data(
+ JournalFile *f,
+ int entry_fd,
+ uint64_t n_entries,
+ uint64_t entry_p,
+ uint64_t data_p) {
+
+ int r;
+ uint64_t i, n, a;
+ Object *o;
+ bool found = false;
+
+ assert(f);
+ assert(entry_fd >= 0);
+
+ if (!contains_uint64(f->mmap, entry_fd, n_entries, entry_p)) {
+ error(data_p, "Data object references invalid entry at "OFSfmt, entry_p);
+ return -EBADMSG;
+ }
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, entry_p, &o);
+ if (r < 0)
+ return r;
+
+ n = journal_file_entry_n_items(o);
+ for (i = 0; i < n; i++)
+ if (le64toh(o->entry.items[i].object_offset) == data_p) {
+ found = true;
+ break;
+ }
+
+ if (!found) {
+ error(entry_p, "Data object at "OFSfmt" not referenced by linked entry", data_p);
+ return -EBADMSG;
+ }
+
+ /* Check if this entry is also in main entry array. Since the
+ * 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);
+
+ while (i < n) {
+ 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);
+ 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;
+
+ if (entry_p < le64toh(o->entry_array.items[z]))
+ y = z;
+ else
+ x = z;
+ }
+
+ error(entry_p, "Entry object doesn't exist in main entry array");
+ return -EBADMSG;
+ }
+
+ i += u;
+ a = le64toh(o->entry_array.next_entry_array_offset);
+ }
+
+ return 0;
+}
+
+static int verify_data(
+ JournalFile *f,
+ Object *o, uint64_t p,
+ int entry_fd, uint64_t n_entries,
+ int entry_array_fd, uint64_t n_entry_arrays) {
+
+ uint64_t i, n, a, last, q;
+ int r;
+
+ assert(f);
+ assert(o);
+ assert(entry_fd >= 0);
+ assert(entry_array_fd >= 0);
+
+ n = le64toh(o->data.n_entries);
+ a = le64toh(o->data.entry_array_offset);
+
+ /* Entry array means at least two objects */
+ if (a && n < 2) {
+ error(p, "Entry array present (entry_array_offset="OFSfmt", but n_entries=%"PRIu64")", a, n);
+ return -EBADMSG;
+ }
+
+ if (n == 0)
+ return 0;
+
+ /* We already checked that earlier */
+ assert(o->data.entry_offset);
+
+ last = q = le64toh(o->data.entry_offset);
+ r = entry_points_to_data(f, entry_fd, n_entries, q, p);
+ if (r < 0)
+ return r;
+
+ i = 1;
+ while (i < n) {
+ uint64_t next, m, j;
+
+ if (a == 0) {
+ error(p, "Array chain too short");
+ return -EBADMSG;
+ }
+
+ if (!contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, a)) {
+ error(p, "Invalid array offset "OFSfmt, a);
+ return -EBADMSG;
+ }
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o);
+ if (r < 0)
+ return r;
+
+ next = le64toh(o->entry_array.next_entry_array_offset);
+ if (next != 0 && next <= a) {
+ error(p, "Array chain has cycle (jumps back from "OFSfmt" to "OFSfmt")", a, next);
+ return -EBADMSG;
+ }
+
+ m = journal_file_entry_array_n_items(o);
+ for (j = 0; i < n && j < m; i++, j++) {
+
+ q = le64toh(o->entry_array.items[j]);
+ if (q <= last) {
+ error(p, "Data object's entry array not sorted");
+ return -EBADMSG;
+ }
+ last = q;
+
+ r = entry_points_to_data(f, entry_fd, n_entries, q, p);
+ if (r < 0)
+ return r;
+
+ /* Pointer might have moved, reposition */
+ r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o);
+ if (r < 0)
+ return r;
+ }
+
+ a = next;
+ }
+
+ return 0;
+}
+
+static int verify_hash_table(
+ JournalFile *f,
+ 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,
+ bool show_progress) {
+
+ uint64_t i, n;
+ int r;
+
+ assert(f);
+ assert(data_fd >= 0);
+ assert(entry_fd >= 0);
+ assert(entry_array_fd >= 0);
+ assert(last_usec);
+
+ n = le64toh(f->header->data_hash_table_size) / sizeof(HashItem);
+ if (n <= 0)
+ return 0;
+
+ r = journal_file_map_data_hash_table(f);
+ if (r < 0)
+ return log_error_errno(r, "Failed to map data hash table: %m");
+
+ for (i = 0; i < n; i++) {
+ uint64_t last = 0, p;
+
+ if (show_progress)
+ draw_progress(0xC000 + scale_progress(0x3FFF, i, n), last_usec);
+
+ p = le64toh(f->data_hash_table[i].head_hash_offset);
+ while (p != 0) {
+ Object *o;
+ uint64_t next;
+
+ if (!contains_uint64(f->mmap, data_fd, n_data, p)) {
+ error(p, "Invalid data object at hash entry %"PRIu64" of %"PRIu64, i, n);
+ return -EBADMSG;
+ }
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, p, &o);
+ if (r < 0)
+ return r;
+
+ next = le64toh(o->data.next_hash_offset);
+ if (next != 0 && next <= p) {
+ error(p, "Hash chain has a cycle in hash entry %"PRIu64" of %"PRIu64, i, n);
+ return -EBADMSG;
+ }
+
+ if (le64toh(o->data.hash) % n != i) {
+ error(p, "Hash value mismatch in hash entry %"PRIu64" of %"PRIu64, i, n);
+ return -EBADMSG;
+ }
+
+ r = verify_data(f, o, p, entry_fd, n_entries, entry_array_fd, n_entry_arrays);
+ if (r < 0)
+ return r;
+
+ last = p;
+ p = next;
+ }
+
+ if (last != le64toh(f->data_hash_table[i].tail_hash_offset)) {
+ error(p, "Tail hash pointer mismatch in hash table");
+ return -EBADMSG;
+ }
+ }
+
+ return 0;
+}
+
+static int data_object_in_hash_table(JournalFile *f, uint64_t hash, uint64_t p) {
+ uint64_t n, h, q;
+ int r;
+ assert(f);
+
+ n = le64toh(f->header->data_hash_table_size) / sizeof(HashItem);
+ if (n <= 0)
+ return 0;
+
+ r = journal_file_map_data_hash_table(f);
+ if (r < 0)
+ return log_error_errno(r, "Failed to map data hash table: %m");
+
+ h = hash % n;
+
+ q = le64toh(f->data_hash_table[h].head_hash_offset);
+ while (q != 0) {
+ Object *o;
+
+ if (p == q)
+ return 1;
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, q, &o);
+ if (r < 0)
+ return r;
+
+ q = le64toh(o->data.next_hash_offset);
+ }
+
+ return 0;
+}
+
+static int verify_entry(
+ JournalFile *f,
+ Object *o, uint64_t p,
+ int data_fd, uint64_t n_data) {
+
+ uint64_t i, n;
+ int r;
+
+ assert(f);
+ assert(o);
+ assert(data_fd >= 0);
+
+ n = journal_file_entry_n_items(o);
+ for (i = 0; i < n; i++) {
+ uint64_t q, h;
+ Object *u;
+
+ q = le64toh(o->entry.items[i].object_offset);
+ h = le64toh(o->entry.items[i].hash);
+
+ if (!contains_uint64(f->mmap, data_fd, n_data, q)) {
+ error(p, "Invalid data object of entry");
+ return -EBADMSG;
+ }
+
+ r = journal_file_move_to_object(f, OBJECT_DATA, q, &u);
+ if (r < 0)
+ return r;
+
+ if (le64toh(u->data.hash) != h) {
+ error(p, "Hash mismatch for data object of entry");
+ return -EBADMSG;
+ }
+
+ r = data_object_in_hash_table(f, h, q);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ error(p, "Data object missing from hash table");
+ return -EBADMSG;
+ }
+ }
+
+ return 0;
+}
+
+static int verify_entry_array(
+ JournalFile *f,
+ 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,
+ bool show_progress) {
+
+ uint64_t i = 0, a, n, last = 0;
+ int r;
+
+ assert(f);
+ assert(data_fd >= 0);
+ assert(entry_fd >= 0);
+ assert(entry_array_fd >= 0);
+ assert(last_usec);
+
+ n = le64toh(f->header->n_entries);
+ a = le64toh(f->header->entry_array_offset);
+ while (i < n) {
+ uint64_t next, m, j;
+ Object *o;
+
+ if (show_progress)
+ draw_progress(0x8000 + scale_progress(0x3FFF, i, n), last_usec);
+
+ if (a == 0) {
+ error(a, "Array chain too short at %"PRIu64" of %"PRIu64, i, n);
+ return -EBADMSG;
+ }
+
+ if (!contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, a)) {
+ error(a, "Invalid array %"PRIu64" of %"PRIu64, i, n);
+ return -EBADMSG;
+ }
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o);
+ if (r < 0)
+ return r;
+
+ next = le64toh(o->entry_array.next_entry_array_offset);
+ if (next != 0 && next <= a) {
+ error(a, "Array chain has cycle at %"PRIu64" of %"PRIu64" (jumps back from to "OFSfmt")", i, n, next);
+ return -EBADMSG;
+ }
+
+ m = journal_file_entry_array_n_items(o);
+ for (j = 0; i < n && j < m; i++, j++) {
+ uint64_t p;
+
+ p = le64toh(o->entry_array.items[j]);
+ if (p <= last) {
+ error(a, "Entry array not sorted at %"PRIu64" of %"PRIu64, i, n);
+ return -EBADMSG;
+ }
+ last = p;
+
+ if (!contains_uint64(f->mmap, entry_fd, n_entries, p)) {
+ error(a, "Invalid array entry at %"PRIu64" of %"PRIu64, i, n);
+ return -EBADMSG;
+ }
+
+ r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o);
+ if (r < 0)
+ return r;
+
+ r = verify_entry(f, o, p, data_fd, n_data);
+ if (r < 0)
+ return r;
+
+ /* Pointer might have moved, reposition */
+ r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o);
+ if (r < 0)
+ return r;
+ }
+
+ a = next;
+ }
+
+ return 0;
+}
+
+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, 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, n_tags = 0;
+ usec_t last_usec = 0;
+ int data_fd = -1, entry_fd = -1, entry_array_fd = -1;
+ unsigned i;
+ bool found_last = false;
+ const char *tmp_dir = NULL;
+
+#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 -EOPNOTSUPP;
+#endif
+ } else if (f->seal)
+ return -ENOKEY;
+
+ r = var_tmp_dir(&tmp_dir);
+ if (r < 0) {
+ log_error_errno(r, "Failed to determine temporary directory: %m");
+ goto fail;
+ }
+
+ data_fd = open_tmpfile_unlinkable(tmp_dir, O_RDWR | O_CLOEXEC);
+ if (data_fd < 0) {
+ r = log_error_errno(data_fd, "Failed to create data file: %m");
+ goto fail;
+ }
+
+ entry_fd = open_tmpfile_unlinkable(tmp_dir, O_RDWR | O_CLOEXEC);
+ if (entry_fd < 0) {
+ r = log_error_errno(entry_fd, "Failed to create entry file: %m");
+ goto fail;
+ }
+
+ entry_array_fd = open_tmpfile_unlinkable(tmp_dir, O_RDWR | O_CLOEXEC);
+ if (entry_array_fd < 0) {
+ r = log_error_errno(entry_array_fd,
+ "Failed to create entry array file: %m");
+ goto fail;
+ }
+
+ if (le32toh(f->header->compatible_flags) & ~HEADER_COMPATIBLE_SUPPORTED) {
+ log_error("Cannot verify file with unknown extensions.");
+ r = -EOPNOTSUPP;
+ goto fail;
+ }
+
+ for (i = 0; i < sizeof(f->header->reserved); i++)
+ if (f->header->reserved[i] != 0) {
+ error(offsetof(Header, reserved[i]), "Reserved field is 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);
+ for (;;) {
+ /* Early exit if there are no objects in the file, at all */
+ if (le64toh(f->header->tail_object_offset) == 0)
+ break;
+
+ if (show_progress)
+ draw_progress(scale_progress(0x7FFF, p, le64toh(f->header->tail_object_offset)), &last_usec);
+
+ r = journal_file_move_to_object(f, OBJECT_UNUSED, p, &o);
+ if (r < 0) {
+ error(p, "Invalid object");
+ goto fail;
+ }
+
+ if (p > le64toh(f->header->tail_object_offset)) {
+ error(offsetof(Header, tail_object_offset), "Invalid tail object pointer");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ n_objects++;
+
+ r = journal_file_object_verify(f, p, o);
+ if (r < 0) {
+ error_errno(p, r, "Invalid object contents: %m");
+ goto fail;
+ }
+
+ if ((o->object.flags & OBJECT_COMPRESSED_XZ) &&
+ (o->object.flags & OBJECT_COMPRESSED_LZ4)) {
+ error(p, "Objected with double compression");
+ r = -EINVAL;
+ goto fail;
+ }
+
+ if ((o->object.flags & OBJECT_COMPRESSED_XZ) && !JOURNAL_HEADER_COMPRESSED_XZ(f->header)) {
+ error(p, "XZ compressed object in file without XZ compression");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if ((o->object.flags & OBJECT_COMPRESSED_LZ4) && !JOURNAL_HEADER_COMPRESSED_LZ4(f->header)) {
+ error(p, "LZ4 compressed object in file without LZ4 compression");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ switch (o->object.type) {
+
+ case OBJECT_DATA:
+ r = write_uint64(data_fd, p);
+ if (r < 0)
+ goto fail;
+
+ n_data++;
+ break;
+
+ case OBJECT_FIELD:
+ n_fields++;
+ break;
+
+ case OBJECT_ENTRY:
+ if (JOURNAL_HEADER_SEALED(f->header) && n_tags <= 0) {
+ error(p, "First entry before first tag");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ r = write_uint64(entry_fd, p);
+ if (r < 0)
+ goto fail;
+
+ if (le64toh(o->entry.realtime) < last_tag_realtime) {
+ error(p, "Older entry after newer tag");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (!entry_seqnum_set &&
+ le64toh(o->entry.seqnum) != le64toh(f->header->head_entry_seqnum)) {
+ error(p, "Head entry sequence number incorrect");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (entry_seqnum_set &&
+ entry_seqnum >= le64toh(o->entry.seqnum)) {
+ error(p, "Entry sequence number out of synchronization");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ entry_seqnum = le64toh(o->entry.seqnum);
+ entry_seqnum_set = true;
+
+ if (entry_monotonic_set &&
+ sd_id128_equal(entry_boot_id, o->entry.boot_id) &&
+ entry_monotonic > le64toh(o->entry.monotonic)) {
+ error(p, "Entry timestamp out of synchronization");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ entry_monotonic = le64toh(o->entry.monotonic);
+ entry_boot_id = o->entry.boot_id;
+ entry_monotonic_set = true;
+
+ if (!entry_realtime_set &&
+ le64toh(o->entry.realtime) != le64toh(f->header->head_entry_realtime)) {
+ error(p, "Head entry realtime timestamp incorrect");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ entry_realtime = le64toh(o->entry.realtime);
+ entry_realtime_set = true;
+
+ n_entries++;
+ break;
+
+ case OBJECT_DATA_HASH_TABLE:
+ if (n_data_hash_tables > 1) {
+ error(p, "More than one data hash table");
+ 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)) {
+ error(p, "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) {
+ error(p, "More than one field hash table");
+ 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)) {
+ error(p, "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) {
+ error(p, "More than one main entry array");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ found_main_entry_array = true;
+ }
+
+ n_entry_arrays++;
+ break;
+
+ case OBJECT_TAG:
+ if (!JOURNAL_HEADER_SEALED(f->header)) {
+ error(p, "Tag object in file without sealing");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (le64toh(o->tag.seqnum) != n_tags + 1) {
+ error(p, "Tag sequence number out of synchronization");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (le64toh(o->tag.epoch) < last_epoch) {
+ error(p, "Epoch sequence out of synchronization");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+#ifdef HAVE_GCRYPT
+ if (f->seal) {
+ uint64_t q, rt;
+
+ debug(p, "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) {
+ error(p, "tag/entry realtime timestamp out of synchronization");
+ 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, OBJECT_UNUSED, q, &o);
+ if (r < 0)
+ goto fail;
+
+ r = journal_file_hmac_put_object(f, OBJECT_UNUSED, 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, OBJECT_UNUSED, p, &o);
+ if (r < 0)
+ goto fail;
+
+ if (memcmp(o->tag.tag, gcry_md_read(f->hmac, 0), TAG_LENGTH) != 0) {
+ error(p, "Tag failed verification");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ f->hmac_running = false;
+ last_tag_realtime = rt;
+ last_sealed_realtime = entry_realtime;
+ }
+
+ 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)) {
+ found_last = true;
+ break;
+ }
+
+ p = p + ALIGN64(le64toh(o->object.size));
+ };
+
+ if (!found_last && le64toh(f->header->tail_object_offset) != 0) {
+ error(le64toh(f->header->tail_object_offset), "Tail object pointer dead");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (n_objects != le64toh(f->header->n_objects)) {
+ error(offsetof(Header, n_objects), "Object number mismatch");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (n_entries != le64toh(f->header->n_entries)) {
+ error(offsetof(Header, n_entries), "Entry number mismatch");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (JOURNAL_HEADER_CONTAINS(f->header, n_data) &&
+ n_data != le64toh(f->header->n_data)) {
+ error(offsetof(Header, n_data), "Data number mismatch");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (JOURNAL_HEADER_CONTAINS(f->header, n_fields) &&
+ n_fields != le64toh(f->header->n_fields)) {
+ error(offsetof(Header, n_fields), "Field number mismatch");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (JOURNAL_HEADER_CONTAINS(f->header, n_tags) &&
+ n_tags != le64toh(f->header->n_tags)) {
+ error(offsetof(Header, n_tags), "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)) {
+ error(offsetof(Header, n_entry_arrays), "Entry array number mismatch");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (!found_main_entry_array && le64toh(f->header->entry_array_offset) != 0) {
+ error(0, "Missing entry array");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (entry_seqnum_set &&
+ entry_seqnum != le64toh(f->header->tail_entry_seqnum)) {
+ error(offsetof(Header, tail_entry_seqnum), "Invalid tail seqnum");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (entry_monotonic_set &&
+ (!sd_id128_equal(entry_boot_id, f->header->boot_id) ||
+ entry_monotonic != le64toh(f->header->tail_entry_monotonic))) {
+ error(0, "Invalid tail monotonic timestamp");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ if (entry_realtime_set && entry_realtime != le64toh(f->header->tail_entry_realtime)) {
+ error(0, "Invalid tail realtime timestamp");
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ /* Second iteration: we follow all objects referenced from the
+ * two entry points: the object hash table and the entry
+ * array. We also check that everything referenced (directly
+ * or indirectly) in the data hash table also exists in the
+ * entry array, and vice versa. Note that we do not care for
+ * unreferenced objects. We only care that everything that is
+ * referenced is consistent. */
+
+ r = verify_entry_array(f,
+ data_fd, n_data,
+ entry_fd, n_entries,
+ entry_array_fd, n_entry_arrays,
+ &last_usec,
+ show_progress);
+ if (r < 0)
+ goto fail;
+
+ r = verify_hash_table(f,
+ data_fd, n_data,
+ entry_fd, n_entries,
+ entry_array_fd, n_entry_arrays,
+ &last_usec,
+ show_progress);
+ if (r < 0)
+ goto fail;
+
+ if (show_progress)
+ flush_progress();
+
+ mmap_cache_close_fd(f->mmap, data_fd);
+ mmap_cache_close_fd(f->mmap, entry_fd);
+ mmap_cache_close_fd(f->mmap, entry_array_fd);
+
+ safe_close(data_fd);
+ safe_close(entry_fd);
+ safe_close(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:
+ if (show_progress)
+ flush_progress();
+
+ log_error("File corruption detected at %s:"OFSfmt" (of %llu bytes, %"PRIu64"%%).",
+ f->path,
+ p,
+ (unsigned long long) f->last_stat.st_size,
+ 100 * p / f->last_stat.st_size);
+
+ if (data_fd >= 0) {
+ mmap_cache_close_fd(f->mmap, data_fd);
+ safe_close(data_fd);
+ }
+
+ if (entry_fd >= 0) {
+ mmap_cache_close_fd(f->mmap, entry_fd);
+ safe_close(entry_fd);
+ }
+
+ if (entry_array_fd >= 0) {
+ mmap_cache_close_fd(f->mmap, entry_array_fd);
+ safe_close(entry_array_fd);
+ }
+
+ return r;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 10:32:01 +0000