| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #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" |
| #if HAVE_GCRYPT |
| #include "journal-authenticate.h" |
| #endif |
| #include "journal-def.h" |
| #include "journal-file.h" |
| #include "journal-verify.h" |
| #include "lookup3.h" |
| #include "macro.h" |
| #include "terminal-util.h" |
| #include "tmpfile-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", stdout); |
| |
| fputs(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. |
| * Currently all callers use m >= 1, but we keep the check to be defensive. |
| */ |
| |
| 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 hash_payload(JournalFile *f, Object *o, uint64_t offset, const uint8_t *src, uint64_t size, uint64_t *res_hash) { |
| Compression c; |
| int r; |
| |
| assert(o); |
| assert(src); |
| assert(res_hash); |
| |
| c = COMPRESSION_FROM_OBJECT(o); |
| if (c < 0) |
| return -EBADMSG; |
| if (c != COMPRESSION_NONE) { |
| _cleanup_free_ void *b = NULL; |
| size_t b_size; |
| |
| r = decompress_blob(c, src, size, &b, &b_size, 0); |
| if (r < 0) { |
| error_errno(offset, r, "%s decompression failed: %m", |
| compression_to_string(c)); |
| return r; |
| } |
| |
| *res_hash = journal_file_hash_data(f, b, b_size); |
| } else |
| *res_hash = journal_file_hash_data(f, src, size); |
| |
| return 0; |
| } |
| |
| static int journal_file_object_verify(JournalFile *f, uint64_t offset, Object *o) { |
| 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_MASK) != 0 && |
| o->object.type != OBJECT_DATA) { |
| error(offset, |
| "Found compressed object of type %s that isn't of type data, which is not allowed.", |
| journal_object_type_to_string(o->object.type)); |
| return -EBADMSG; |
| } |
| |
| switch (o->object.type) { |
| |
| case OBJECT_DATA: { |
| uint64_t h1, h2; |
| int 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, le64toh(o->data.n_entries)); |
| return -EBADMSG; |
| } |
| |
| if (le64toh(o->object.size) - journal_file_data_payload_offset(f) <= 0) { |
| error(offset, "Bad object size (<= %zu): %"PRIu64, |
| journal_file_data_payload_offset(f), |
| le64toh(o->object.size)); |
| return -EBADMSG; |
| } |
| |
| h1 = le64toh(o->data.hash); |
| r = hash_payload(f, o, offset, journal_file_data_payload_field(f, o), |
| le64toh(o->object.size) - journal_file_data_payload_offset(f), |
| &h2); |
| if (r < 0) |
| return r; |
| |
| if (h1 != h2) { |
| error(offset, "Invalid hash (%08" PRIx64 " vs. %08" PRIx64 ")", h1, h2); |
| return -EBADMSG; |
| } |
| |
| if (!VALID64(le64toh(o->data.next_hash_offset)) || |
| !VALID64(le64toh(o->data.next_field_offset)) || |
| !VALID64(le64toh(o->data.entry_offset)) || |
| !VALID64(le64toh(o->data.entry_array_offset))) { |
| error(offset, "Invalid offset (next_hash_offset="OFSfmt", next_field_offset="OFSfmt", entry_offset="OFSfmt", entry_array_offset="OFSfmt, |
| le64toh(o->data.next_hash_offset), |
| le64toh(o->data.next_field_offset), |
| le64toh(o->data.entry_offset), |
| le64toh(o->data.entry_array_offset)); |
| return -EBADMSG; |
| } |
| |
| break; |
| } |
| |
| case OBJECT_FIELD: { |
| uint64_t h1, h2; |
| int r; |
| |
| if (le64toh(o->object.size) - offsetof(Object, field.payload) <= 0) { |
| error(offset, |
| "Bad field size (<= %zu): %"PRIu64, |
| offsetof(Object, field.payload), |
| le64toh(o->object.size)); |
| return -EBADMSG; |
| } |
| |
| h1 = le64toh(o->field.hash); |
| r = hash_payload(f, o, offset, o->field.payload, |
| le64toh(o->object.size) - offsetof(Object, field.payload), |
| &h2); |
| if (r < 0) |
| return r; |
| |
| if (h1 != h2) { |
| error(offset, "Invalid hash (%08" PRIx64 " vs. %08" PRIx64 ")", h1, h2); |
| return -EBADMSG; |
| } |
| |
| if (!VALID64(le64toh(o->field.next_hash_offset)) || |
| !VALID64(le64toh(o->field.head_data_offset))) { |
| error(offset, |
| "Invalid offset (next_hash_offset="OFSfmt", head_data_offset="OFSfmt, |
| le64toh(o->field.next_hash_offset), |
| le64toh(o->field.head_data_offset)); |
| return -EBADMSG; |
| } |
| break; |
| } |
| |
| case OBJECT_ENTRY: |
| if ((le64toh(o->object.size) - offsetof(Object, entry.items)) % journal_file_entry_item_size(f) != 0) { |
| error(offset, |
| "Bad entry size (<= %zu): %"PRIu64, |
| offsetof(Object, entry.items), |
| le64toh(o->object.size)); |
| return -EBADMSG; |
| } |
| |
| if ((le64toh(o->object.size) - offsetof(Object, entry.items)) / journal_file_entry_item_size(f) <= 0) { |
| error(offset, |
| "Invalid number items in entry: %"PRIu64, |
| (le64toh(o->object.size) - offsetof(Object, entry.items)) / journal_file_entry_item_size(f)); |
| 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 (uint64_t i = 0; i < journal_file_entry_n_items(f, o); i++) { |
| if (journal_file_entry_item_object_offset(f, o, i) == 0 || |
| !VALID64(journal_file_entry_item_object_offset(f, o, i))) { |
| error(offset, |
| "Invalid entry item (%"PRIu64"/%"PRIu64") offset: "OFSfmt, |
| i, journal_file_entry_n_items(f, o), |
| journal_file_entry_item_object_offset(f, o, i)); |
| return -EBADMSG; |
| } |
| } |
| |
| break; |
| |
| case OBJECT_DATA_HASH_TABLE: |
| case OBJECT_FIELD_HASH_TABLE: |
| if ((le64toh(o->object.size) - offsetof(Object, hash_table.items)) % sizeof(HashItem) != 0 || |
| (le64toh(o->object.size) - offsetof(Object, hash_table.items)) / sizeof(HashItem) <= 0) { |
| error(offset, |
| "Invalid %s size: %"PRIu64, |
| journal_object_type_to_string(o->object.type), |
| le64toh(o->object.size)); |
| return -EBADMSG; |
| } |
| |
| for (uint64_t 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, |
| journal_object_type_to_string(o->object.type), |
| 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, |
| journal_object_type_to_string(o->object.type), |
| 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, |
| journal_object_type_to_string(o->object.type), |
| 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(Object, entry_array.items)) % journal_file_entry_array_item_size(f) != 0 || |
| (le64toh(o->object.size) - offsetof(Object, entry_array.items)) / journal_file_entry_array_item_size(f) <= 0) { |
| error(offset, |
| "Invalid object entry array size: %"PRIu64, |
| le64toh(o->object.size)); |
| return -EBADMSG; |
| } |
| |
| if (!VALID64(le64toh(o->entry_array.next_entry_array_offset))) { |
| error(offset, |
| "Invalid object entry array next_entry_array_offset: "OFSfmt, |
| le64toh(o->entry_array.next_entry_array_offset)); |
| return -EBADMSG; |
| } |
| |
| for (uint64_t i = 0; i < journal_file_entry_array_n_items(f, o); i++) { |
| uint64_t q = journal_file_entry_array_item(f, o, i); |
| if (q != 0 && !VALID64(q)) { |
| error(offset, |
| "Invalid object entry array item (%"PRIu64"/%"PRIu64"): "OFSfmt, |
| i, journal_file_entry_array_n_items(f, o), q); |
| 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(le64toh(o->tag.epoch))) { |
| error(offset, |
| "Invalid object tag epoch: %"PRIu64, |
| le64toh(o->tag.epoch)); |
| return -EBADMSG; |
| } |
| |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int write_uint64(FILE *fp, uint64_t p) { |
| if (fwrite(&p, sizeof(p), 1, fp) != 1) |
| return -errno; |
| |
| return 0; |
| } |
| |
| static int contains_uint64(MMapFileDescriptor *f, uint64_t n, uint64_t p) { |
| uint64_t a, b; |
| int r; |
| |
| assert(f); |
| |
| /* Bisection ... */ |
| |
| a = 0; b = n; |
| while (a < b) { |
| uint64_t c, *z; |
| |
| c = (a + b) / 2; |
| |
| r = mmap_cache_fd_get(f, 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 verify_data( |
| JournalFile *f, |
| Object *o, uint64_t p, |
| MMapFileDescriptor *cache_entry_fd, uint64_t n_entries, |
| MMapFileDescriptor *cache_entry_array_fd, uint64_t n_entry_arrays) { |
| |
| uint64_t i, n, a, last, q; |
| int r; |
| |
| assert(f); |
| assert(o); |
| assert(cache_entry_fd); |
| assert(cache_entry_array_fd); |
| |
| 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); |
| if (!contains_uint64(cache_entry_fd, n_entries, q)) { |
| error(p, "Data object references invalid entry at "OFSfmt, q); |
| return -EBADMSG; |
| } |
| |
| r = journal_file_move_to_entry_by_offset(f, q, DIRECTION_DOWN, NULL, NULL); |
| if (r < 0) |
| return r; |
| if (r == 0) { |
| error(q, "Entry object doesn't exist in the main entry array"); |
| return -EBADMSG; |
| } |
| |
| i = 1; |
| while (i < n) { |
| uint64_t next, m, j; |
| |
| if (a == 0) { |
| error(p, "Array chain too short"); |
| return -EBADMSG; |
| } |
| |
| if (!contains_uint64(cache_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(f, o); |
| for (j = 0; i < n && j < m; i++, j++) { |
| |
| q = journal_file_entry_array_item(f, o, j); |
| if (q <= last) { |
| error(p, "Data object's entry array not sorted (%"PRIu64" <= %"PRIu64")", q, last); |
| return -EBADMSG; |
| } |
| last = q; |
| |
| if (!contains_uint64(cache_entry_fd, n_entries, q)) { |
| error(p, "Data object references invalid entry at "OFSfmt, q); |
| return -EBADMSG; |
| } |
| |
| r = journal_file_move_to_entry_by_offset(f, q, DIRECTION_DOWN, NULL, NULL); |
| if (r < 0) |
| return r; |
| if (r == 0) { |
| error(q, "Entry object doesn't exist in the main entry array"); |
| return -EBADMSG; |
| } |
| |
| /* 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_data_hash_table( |
| JournalFile *f, |
| MMapFileDescriptor *cache_data_fd, uint64_t n_data, |
| MMapFileDescriptor *cache_entry_fd, uint64_t n_entries, |
| MMapFileDescriptor *cache_entry_array_fd, uint64_t n_entry_arrays, |
| usec_t *last_usec, |
| bool show_progress) { |
| |
| uint64_t i, n; |
| int r; |
| |
| assert(f); |
| assert(cache_data_fd); |
| assert(cache_entry_fd); |
| assert(cache_entry_array_fd); |
| 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(cache_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, cache_entry_fd, n_entries, cache_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 (%"PRIu64" != %"PRIu64")", |
| last, |
| le64toh(f->data_hash_table[i].tail_hash_offset)); |
| 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, |
| MMapFileDescriptor *cache_data_fd, uint64_t n_data, |
| bool last) { |
| |
| uint64_t i, n; |
| int r; |
| |
| assert(f); |
| assert(o); |
| assert(cache_data_fd); |
| |
| n = journal_file_entry_n_items(f, o); |
| for (i = 0; i < n; i++) { |
| uint64_t q; |
| Object *u; |
| |
| q = journal_file_entry_item_object_offset(f, o, i); |
| |
| if (!contains_uint64(cache_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; |
| |
| r = data_object_in_hash_table(f, le64toh(u->data.hash), q); |
| if (r < 0) |
| return r; |
| if (r == 0) { |
| error(p, "Data object missing from hash table"); |
| return -EBADMSG; |
| } |
| |
| /* Pointer might have moved, reposition */ |
| r = journal_file_move_to_object(f, OBJECT_DATA, q, &u); |
| if (r < 0) |
| return r; |
| |
| r = journal_file_move_to_entry_by_offset_for_data(f, u, p, DIRECTION_DOWN, NULL, NULL); |
| if (r < 0) |
| return r; |
| |
| /* The last entry object has a very high chance of not being referenced as journal files |
| * almost always run out of space during linking of entry items when trying to add a new |
| * entry array so let's not error in that scenario. */ |
| if (r == 0 && !last) { |
| error(p, "Entry object not referenced by linked data object at "OFSfmt, q); |
| return -EBADMSG; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int verify_entry_array( |
| JournalFile *f, |
| MMapFileDescriptor *cache_data_fd, uint64_t n_data, |
| MMapFileDescriptor *cache_entry_fd, uint64_t n_entries, |
| MMapFileDescriptor *cache_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(cache_data_fd); |
| assert(cache_entry_fd); |
| assert(cache_entry_array_fd); |
| 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(cache_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(f, o); |
| for (j = 0; i < n && j < m; i++, j++) { |
| uint64_t p; |
| |
| p = journal_file_entry_array_item(f, o, j); |
| if (p <= last) { |
| error(a, "Entry array not sorted at %"PRIu64" of %"PRIu64, i, n); |
| return -EBADMSG; |
| } |
| last = p; |
| |
| if (!contains_uint64(cache_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, cache_data_fd, n_data, /*last=*/ i + 1 == n); |
| 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( |
| Object *o, uint64_t p, uint64_t *n_hash_tables, uint64_t header_offset, uint64_t header_size) { |
| |
| assert(o); |
| assert(n_hash_tables); |
| |
| if (*n_hash_tables > 1) { |
| error(p, |
| "More than one %s: %" PRIu64, |
| journal_object_type_to_string(o->object.type), |
| *n_hash_tables); |
| return -EBADMSG; |
| } |
| |
| if (header_offset != p + offsetof(Object, hash_table.items)) { |
| error(p, |
| "Header offset for %s invalid (%" PRIu64 " != %" PRIu64 ")", |
| journal_object_type_to_string(o->object.type), |
| header_offset, |
| p + offsetof(Object, hash_table.items)); |
| return -EBADMSG; |
| } |
| |
| if (header_size != le64toh(o->object.size) - offsetof(Object, hash_table.items)) { |
| error(p, |
| "Header size for %s invalid (%" PRIu64 " != %" PRIu64 ")", |
| journal_object_type_to_string(o->object.type), |
| header_size, |
| le64toh(o->object.size) - offsetof(Object, hash_table.items)); |
| return -EBADMSG; |
| } |
| |
| (*n_hash_tables)++; |
| |
| 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 = {}; /* Unnecessary initialization to appease gcc */ |
| bool entry_seqnum_set = false, entry_monotonic_set = false, entry_realtime_set = false, found_main_entry_array = false; |
| uint64_t 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; |
| _cleanup_close_ int data_fd = -EBADF, entry_fd = -EBADF, entry_array_fd = -EBADF; |
| _cleanup_fclose_ FILE *data_fp = NULL, *entry_fp = NULL, *entry_array_fp = NULL; |
| MMapFileDescriptor *cache_data_fd = NULL, *cache_entry_fd = NULL, *cache_entry_array_fd = NULL; |
| unsigned i; |
| bool found_last = false; |
| const char *tmp_dir = NULL; |
| MMapCache *m; |
| |
| #if HAVE_GCRYPT |
| uint64_t last_tag = 0; |
| #endif |
| assert(f); |
| |
| if (key) { |
| #if 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 (JOURNAL_HEADER_SEALED(f->header)) |
| 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; |
| } |
| |
| m = mmap_cache_fd_cache(f->cache_fd); |
| cache_data_fd = mmap_cache_add_fd(m, data_fd, PROT_READ|PROT_WRITE); |
| if (!cache_data_fd) { |
| r = log_oom(); |
| goto fail; |
| } |
| |
| cache_entry_fd = mmap_cache_add_fd(m, entry_fd, PROT_READ|PROT_WRITE); |
| if (!cache_entry_fd) { |
| r = log_oom(); |
| goto fail; |
| } |
| |
| cache_entry_array_fd = mmap_cache_add_fd(m, entry_array_fd, PROT_READ|PROT_WRITE); |
| if (!cache_entry_array_fd) { |
| r = log_oom(); |
| goto fail; |
| } |
| |
| r = take_fdopen_unlocked(&data_fd, "w+", &data_fp); |
| if (r < 0) { |
| log_error_errno(r, "Failed to open data file stream: %m"); |
| goto fail; |
| } |
| |
| r = take_fdopen_unlocked(&entry_fd, "w+", &entry_fp); |
| if (r < 0) { |
| log_error_errno(r, "Failed to open entry file stream: %m"); |
| goto fail; |
| } |
| |
| r = take_fdopen_unlocked(&entry_array_fd, "w+", &entry_array_fp); |
| if (r < 0) { |
| log_error_errno(r, "Failed to open entry array file stream: %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_errno(p, r, "Invalid object: %m"); |
| goto fail; |
| } |
| |
| if (p > le64toh(f->header->tail_object_offset)) { |
| error(offsetof(Header, tail_object_offset), |
| "Invalid tail object pointer (%"PRIu64" > %"PRIu64")", |
| p, |
| le64toh(f->header->tail_object_offset)); |
| 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) + |
| !!(o->object.flags & OBJECT_COMPRESSED_ZSTD) > 1) { |
| error(p, "Object has multiple compression flags set (flags: 0x%x)", o->object.flags); |
| 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; |
| } |
| |
| if ((o->object.flags & OBJECT_COMPRESSED_ZSTD) && !JOURNAL_HEADER_COMPRESSED_ZSTD(f->header)) { |
| error(p, "ZSTD compressed object in file without ZSTD compression"); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| switch (o->object.type) { |
| |
| case OBJECT_DATA: |
| r = write_uint64(data_fp, 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_fp, p); |
| if (r < 0) |
| goto fail; |
| |
| if (le64toh(o->entry.realtime) < last_tag_realtime) { |
| error(p, |
| "Older entry after newer tag (%"PRIu64" < %"PRIu64")", |
| le64toh(o->entry.realtime), |
| last_tag_realtime); |
| 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 (%"PRIu64" != %"PRIu64")", |
| le64toh(o->entry.seqnum), |
| le64toh(f->header->head_entry_seqnum)); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| if (entry_seqnum_set && |
| entry_seqnum >= le64toh(o->entry.seqnum)) { |
| error(p, |
| "Entry sequence number out of synchronization (%"PRIu64" >= %"PRIu64")", |
| entry_seqnum, |
| le64toh(o->entry.seqnum)); |
| 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 (%"PRIu64" > %"PRIu64")", |
| entry_monotonic, |
| le64toh(o->entry.monotonic)); |
| 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 (%"PRIu64" != %"PRIu64")", |
| le64toh(o->entry.realtime), |
| le64toh(f->header->head_entry_realtime)); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| entry_realtime = le64toh(o->entry.realtime); |
| entry_realtime_set = true; |
| |
| n_entries++; |
| break; |
| |
| case OBJECT_DATA_HASH_TABLE: |
| r = verify_hash_table(o, p, &n_data_hash_tables, |
| le64toh(f->header->data_hash_table_offset), |
| le64toh(f->header->data_hash_table_size)); |
| if (r < 0) |
| goto fail; |
| break; |
| |
| case OBJECT_FIELD_HASH_TABLE: |
| r = verify_hash_table(o, p, &n_field_hash_tables, |
| le64toh(f->header->field_hash_table_offset), |
| le64toh(f->header->field_hash_table_size)); |
| if (r < 0) |
| goto fail; |
| |
| break; |
| |
| case OBJECT_ENTRY_ARRAY: |
| r = write_uint64(entry_array_fp, 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 (%"PRIu64" != %"PRIu64")", |
| le64toh(o->tag.seqnum), |
| n_tags + 1); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| if (le64toh(o->tag.epoch) < last_epoch) { |
| error(p, |
| "Epoch sequence out of synchronization (%"PRIu64" < %"PRIu64")", |
| le64toh(o->tag.epoch), |
| last_epoch); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| #if HAVE_GCRYPT |
| if (JOURNAL_HEADER_SEALED(f->header)) { |
| uint64_t q, rt; |
| |
| debug(p, "Checking tag %"PRIu64"...", le64toh(o->tag.seqnum)); |
| |
| rt = f->fss_start_usec + le64toh(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 (%"PRIu64" >= %"PRIu64")", |
| entry_realtime, |
| rt + f->fss_interval_usec); |
| 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; |
| } |
| |
| 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 (%"PRIu64" != 0)", |
| le64toh(f->header->tail_object_offset)); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| if (n_objects != le64toh(f->header->n_objects)) { |
| error(offsetof(Header, n_objects), |
| "Object number mismatch (%"PRIu64" != %"PRIu64")", |
| n_objects, |
| le64toh(f->header->n_objects)); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| if (n_entries != le64toh(f->header->n_entries)) { |
| error(offsetof(Header, n_entries), |
| "Entry number mismatch (%"PRIu64" != %"PRIu64")", |
| n_entries, |
| le64toh(f->header->n_entries)); |
| 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 (%"PRIu64" != %"PRIu64")", |
| n_data, |
| le64toh(f->header->n_data)); |
| 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 (%"PRIu64" != %"PRIu64")", |
| n_fields, |
| le64toh(f->header->n_fields)); |
| 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 (%"PRIu64" != %"PRIu64")", |
| n_tags, |
| le64toh(f->header->n_tags)); |
| 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 (%"PRIu64" != %"PRIu64")", |
| n_entry_arrays, |
| le64toh(f->header->n_entry_arrays)); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| if (!found_main_entry_array && le64toh(f->header->entry_array_offset) != 0) { |
| error(0, "Missing main entry array"); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| if (entry_seqnum_set && |
| entry_seqnum != le64toh(f->header->tail_entry_seqnum)) { |
| error(offsetof(Header, tail_entry_seqnum), |
| "Tail entry sequence number incorrect (%"PRIu64" != %"PRIu64")", |
| entry_seqnum, |
| le64toh(f->header->tail_entry_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 (%"PRIu64" != %"PRIu64")", |
| entry_monotonic, |
| le64toh(f->header->tail_entry_monotonic)); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| if (entry_realtime_set && entry_realtime != le64toh(f->header->tail_entry_realtime)) { |
| error(0, |
| "Invalid tail realtime timestamp (%"PRIu64" != %"PRIu64")", |
| entry_realtime, |
| le64toh(f->header->tail_entry_realtime)); |
| r = -EBADMSG; |
| goto fail; |
| } |
| |
| if (fflush(data_fp) != 0) { |
| r = log_error_errno(errno, "Failed to flush data file stream: %m"); |
| goto fail; |
| } |
| |
| if (fflush(entry_fp) != 0) { |
| r = log_error_errno(errno, "Failed to flush entry file stream: %m"); |
| goto fail; |
| } |
| |
| if (fflush(entry_array_fp) != 0) { |
| r = log_error_errno(errno, "Failed to flush entry array file stream: %m"); |
| 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, |
| cache_data_fd, n_data, |
| cache_entry_fd, n_entries, |
| cache_entry_array_fd, n_entry_arrays, |
| &last_usec, |
| show_progress); |
| if (r < 0) |
| goto fail; |
| |
| r = verify_data_hash_table(f, |
| cache_data_fd, n_data, |
| cache_entry_fd, n_entries, |
| cache_entry_array_fd, n_entry_arrays, |
| &last_usec, |
| show_progress); |
| if (r < 0) |
| goto fail; |
| |
| if (show_progress) |
| flush_progress(); |
| |
| mmap_cache_fd_free(cache_data_fd); |
| mmap_cache_fd_free(cache_entry_fd); |
| mmap_cache_fd_free(cache_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:%"PRIu64" (of %"PRIu64" bytes, %"PRIu64"%%).", |
| f->path, |
| p, |
| (uint64_t) f->last_stat.st_size, |
| 100U * p / (uint64_t) f->last_stat.st_size); |
| |
| if (cache_data_fd) |
| mmap_cache_fd_free(cache_data_fd); |
| |
| if (cache_entry_fd) |
| mmap_cache_fd_free(cache_entry_fd); |
| |
| if (cache_entry_array_fd) |
| mmap_cache_fd_free(cache_entry_array_fd); |
| |
| return r; |
| } |
