diff options
Diffstat (limited to 'src/journal/journal-verify.c')
| -rw-r--r-- | src/journal/journal-verify.c | 1313 |
1 files changed, 0 insertions, 1313 deletions
diff --git a/src/journal/journal-verify.c b/src/journal/journal-verify.c deleted file mode 100644 index 9e4d8a28a5..0000000000 --- a/src/journal/journal-verify.c +++ /dev/null @@ -1,1313 +0,0 @@ -/*** - 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 "alloc-util.h" -#include "compress.h" -#include "fd-util.h" -#include "fileio.h" -#include "fs-util.h" -#include "journal-authenticate.h" -#include "journal-def.h" -#include "journal-file.h" -#include "journal-verify.h" -#include "lookup3.h" -#include "macro.h" -#include "terminal-util.h" -#include "util.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; -} |