X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fjournal%2Fjournal-verify.c;h=340581153425cb67c979d18877404b65c95700c3;hp=f3182e876ea1bfef14bd732626cce9d2b25966e8;hb=a69f4254a82765cd0c7f155d5dc86e0768ea0ef3;hpb=0284adc6a60ce0af1107cb0b50041a65d731f39e diff --git a/src/journal/journal-verify.c b/src/journal/journal-verify.c index f3182e876..340581153 100644 --- a/src/journal/journal-verify.c +++ b/src/journal/journal-verify.c @@ -22,6 +22,7 @@ #include #include #include +#include #include "util.h" #include "macro.h" @@ -29,59 +30,251 @@ #include "journal-file.h" #include "journal-authenticate.h" #include "journal-verify.h" +#include "lookup3.h" +#include "compress.h" +#include "fsprg.h" + +/* Use six characters to cover the offsets common in smallish journal + * files without adding to many zeros. */ +#define OFSfmt "%06"PRIx64 + +static int journal_file_object_verify(JournalFile *f, uint64_t offset, Object *o) { + uint64_t i; -static int journal_file_object_verify(JournalFile *f, 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) && + o->object.type != OBJECT_DATA) + return -EBADMSG; + switch (o->object.type) { - case OBJECT_DATA: - if (le64toh(o->data.entry_offset) <= 0 || - le64toh(o->data.n_entries) <= 0) + + case OBJECT_DATA: { + uint64_t h1, h2; + + if (le64toh(o->data.entry_offset) == 0) + log_warning(OFSfmt": unused data (entry_offset==0)", offset); + + if ((le64toh(o->data.entry_offset) == 0) ^ (le64toh(o->data.n_entries) == 0)) { + log_error(OFSfmt": bad n_entries: %"PRIu64, offset, o->data.n_entries); + return -EBADMSG; + } + + if (le64toh(o->object.size) - offsetof(DataObject, payload) <= 0) { + log_error(OFSfmt": bad object size (<= %zu): %"PRIu64, + offset, + offsetof(DataObject, payload), + le64toh(o->object.size)); + return -EBADMSG; + } + + h1 = le64toh(o->data.hash); + + if (o->object.flags & OBJECT_COMPRESSED) { +#ifdef HAVE_XZ + void *b = NULL; + uint64_t alloc = 0, b_size; + + if (!uncompress_blob(o->data.payload, + le64toh(o->object.size) - offsetof(Object, data.payload), + &b, &alloc, &b_size, 0)) { + log_error(OFSfmt": uncompression failed", offset); + return -EBADMSG; + } + + h2 = hash64(b, b_size); + free(b); +#else + log_error("Compression is not supported"); + return -EPROTONOSUPPORT; +#endif + } else + h2 = hash64(o->data.payload, le64toh(o->object.size) - offsetof(Object, data.payload)); + + if (h1 != h2) { + log_error(OFSfmt": invalid hash (%08"PRIx64" vs. %08"PRIx64, offset, h1, h2); return -EBADMSG; + } - if (le64toh(o->object.size) - offsetof(DataObject, payload) <= 0) + if (!VALID64(o->data.next_hash_offset) || + !VALID64(o->data.next_field_offset) || + !VALID64(o->data.entry_offset) || + !VALID64(o->data.entry_array_offset)) { + log_error(OFSfmt": invalid offset (next_hash_offset="OFSfmt", next_field_offset="OFSfmt", entry_offset="OFSfmt", entry_array_offset="OFSfmt, + offset, + 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) + if (le64toh(o->object.size) - offsetof(FieldObject, payload) <= 0) { + log_error(OFSfmt": bad field size (<= %zu): %"PRIu64, + offset, + offsetof(FieldObject, payload), + le64toh(o->object.size)); + return -EBADMSG; + } + + if (!VALID64(o->field.next_hash_offset) || + !VALID64(o->field.head_data_offset)) { + log_error(OFSfmt": invalid offset (next_hash_offset="OFSfmt", head_data_offset="OFSfmt, + offset, + 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) + if ((le64toh(o->object.size) - offsetof(EntryObject, items)) % sizeof(EntryItem) != 0) { + log_error(OFSfmt": bad entry size (<= %zu): %"PRIu64, + offset, + offsetof(EntryObject, items), + le64toh(o->object.size)); return -EBADMSG; + } + + if ((le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem) <= 0) { + log_error(OFSfmt": invalid number items in entry: %"PRIu64, + offset, + (le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem)); + return -EBADMSG; + } + + if (le64toh(o->entry.seqnum) <= 0) { + log_error(OFSfmt": invalid entry seqnum: %"PRIx64, + offset, + le64toh(o->entry.seqnum)); + return -EBADMSG; + } - if ((le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem) <= 0) + if (!VALID_REALTIME(le64toh(o->entry.realtime))) { + log_error(OFSfmt": invalid entry realtime timestamp: %"PRIu64, + offset, + le64toh(o->entry.realtime)); return -EBADMSG; + } - if (le64toh(o->entry.seqnum) <= 0 || - le64toh(o->entry.realtime) <= 0) + if (!VALID_MONOTONIC(le64toh(o->entry.monotonic))) { + log_error(OFSfmt": invalid entry monotonic timestamp: %"PRIu64, + offset, + 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)) { + log_error(OFSfmt": invalid entry item (%"PRIu64"/%"PRIu64" offset: "OFSfmt, + offset, + 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) + if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) % sizeof(HashItem) != 0 || + (le64toh(o->object.size) - offsetof(HashTableObject, items)) / sizeof(HashItem) <= 0) { + log_error(OFSfmt": invalid %s hash table size: %"PRIu64, + offset, + 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))) { + log_error(OFSfmt": invalid %s hash table item (%"PRIu64"/%"PRIu64") head_hash_offset: "OFSfmt, + offset, + 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))) { + log_error(OFSfmt": invalid %s hash table item (%"PRIu64"/%"PRIu64") tail_hash_offset: "OFSfmt, + offset, + 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)) { + log_error(OFSfmt": invalid %s hash table item (%"PRIu64"/%"PRIu64"): head_hash_offset="OFSfmt" tail_hash_offset="OFSfmt, + offset, + 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) + if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) % sizeof(le64_t) != 0 || + (le64toh(o->object.size) - offsetof(EntryArrayObject, items)) / sizeof(le64_t) <= 0) { + log_error(OFSfmt": invalid object entry array size: %"PRIu64, + offset, + le64toh(o->object.size)); + return -EBADMSG; + } + + if (!VALID64(o->entry_array.next_entry_array_offset)) { + log_error(OFSfmt": invalid object entry array next_entry_array_offset: "OFSfmt, + offset, + o->entry_array.next_entry_array_offset); return -EBADMSG; + } + + for (i = 0; i < journal_file_entry_array_n_items(o); i++) + if (o->entry_array.items[i] != 0 && + !VALID64(o->entry_array.items[i])) { + log_error(OFSfmt": invalid object entry array item (%"PRIu64"/%"PRIu64"): "OFSfmt, + offset, + i, journal_file_entry_array_n_items(o), + o->entry_array.items[i]); + return -EBADMSG; + } break; case OBJECT_TAG: - if (le64toh(o->object.size) != sizeof(TagObject)) + if (le64toh(o->object.size) != sizeof(TagObject)) { + log_error(OFSfmt": invalid object tag size: %"PRIu64, + offset, + le64toh(o->object.size)); + return -EBADMSG; + } + + if (!VALID_EPOCH(o->tag.epoch)) { + log_error(OFSfmt": invalid object tag epoch: %"PRIu64, + offset, + o->tag.epoch); return -EBADMSG; + } + break; } @@ -92,7 +285,7 @@ static void draw_progress(uint64_t p, usec_t *last_usec) { unsigned n, i, j, k; usec_t z, x; - if (!isatty(STDOUT_FILENO)) + if (!on_tty()) return; z = now(CLOCK_MONOTONIC); @@ -107,15 +300,17 @@ static void draw_progress(uint64_t p, usec_t *last_usec) { j = (n * (unsigned) p) / 65535ULL; k = n - j; - fputs("\r\x1B[?25l", stdout); + fputs("\r\x1B[?25l" ANSI_HIGHLIGHT_GREEN_ON, stdout); for (i = 0; i < j; i++) fputs("\xe2\x96\x88", stdout); + fputs(ANSI_HIGHLIGHT_OFF, stdout); + for (i = 0; i < k; i++) fputs("\xe2\x96\x91", stdout); - printf(" %3lu%%", 100LU * (unsigned long) p / 65535LU); + printf(" %3"PRIu64"%%", 100U * p / 65535U); fputs("\r\x1B[?25h", stdout); fflush(stdout); @@ -124,7 +319,7 @@ static void draw_progress(uint64_t p, usec_t *last_usec) { static void flush_progress(void) { unsigned n, i; - if (!isatty(STDOUT_FILENO)) + if (!on_tty()) return; n = (3 * columns()) / 4; @@ -165,13 +360,16 @@ static int contains_uint64(MMapCache *m, int fd, uint64_t n, uint64_t p) { c = (a + b) / 2; - r = mmap_cache_get(m, fd, PROT_READ, 0, c * sizeof(uint64_t), sizeof(uint64_t), (void **) &z); + r = mmap_cache_get(m, fd, PROT_READ|PROT_WRITE, 0, false, c * sizeof(uint64_t), sizeof(uint64_t), NULL, (void **) &z); if (r < 0) return r; if (*z == p) return 1; + if (a + 1 >= b) + return 0; + if (p < *z) b = c; else @@ -181,25 +379,443 @@ static int contains_uint64(MMapCache *m, int fd, uint64_t n, uint64_t p) { return 0; } -int journal_file_verify(JournalFile *f, const char *key) { +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)) { + log_error("Data object references invalid entry at %"PRIu64, data_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) { + log_error("Data object not referenced by linked entry at %"PRIu64, 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; + } + + log_error("Entry object doesn't exist in main entry array at %"PRIu64, entry_p); + return -EBADMSG; + } + + i += u; + a = le64toh(o->entry_array.next_entry_array_offset); + } + + return 0; +} + +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) { + log_error("Entry array present (entry_array_offset=%"PRIu64", 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) { + log_error("Array chain too short at %"PRIu64, p); + return -EBADMSG; + } + + if (!contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, a)) { + log_error("Invalid array at %"PRIu64, p); + 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) { + log_error("Array chain has cycle at %"PRIu64, p); + 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) { + log_error("Data object's entry array not sorted at %"PRIu64, p); + 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); + for (i = 0; i < n; i++) { + uint64_t last = 0, p; + + if (show_progress) + draw_progress(0xC000 + (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)) { + log_error("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) { + log_error("Hash chain has a cycle in hash entry %"PRIu64" of %"PRIu64, + i, n); + return -EBADMSG; + } + + if (le64toh(o->data.hash) % n != i) { + log_error("Hash value mismatch in hash entry %"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)) { + log_error("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); + 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)) { + log_error("Invalid data object at entry %"PRIu64, p); + return -EBADMSG; + } + + r = journal_file_move_to_object(f, OBJECT_DATA, q, &u); + if (r < 0) + return r; + + if (le64toh(u->data.hash) != h) { + log_error("Hash mismatch for data object at entry %"PRIu64, p); + return -EBADMSG; + } + + r = data_object_in_hash_table(f, h, q); + if (r < 0) + return r; + if (r == 0) { + log_error("Data object missing from hash at entry %"PRIu64, p); + 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 + (0x3FFF * i / n), last_usec); + + if (a == 0) { + log_error("Array chain too short at %"PRIu64" of %"PRIu64, i, n); + return -EBADMSG; + } + + if (!contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, a)) { + log_error("Invalid array at %"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) { + log_error("Array chain has cycle at %"PRIu64" of %"PRIu64, i, n); + 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) { + log_error("Entry array not sorted at %"PRIu64" of %"PRIu64, + i, n); + return -EBADMSG; + } + last = p; + + if (!contains_uint64(f->mmap, entry_fd, n_entries, p)) { + log_error("Invalid array entry at %"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; - uint64_t tag_seqnum = 0, entry_seqnum = 0, entry_monotonic = 0, entry_realtime = 0; + uint64_t p = 0, last_epoch = 0, last_tag_realtime = 0, last_sealed_realtime = 0; + + uint64_t entry_seqnum = 0, entry_monotonic = 0, entry_realtime = 0; sd_id128_t entry_boot_id; bool entry_seqnum_set = false, entry_monotonic_set = false, entry_realtime_set = false, found_main_entry_array = false; - uint64_t n_weird = 0, n_objects = 0, n_entries = 0, n_data = 0, n_fields = 0, n_data_hash_tables = 0, n_field_hash_tables = 0, n_entry_arrays = 0; + uint64_t n_weird = 0, n_objects = 0, n_entries = 0, n_data = 0, n_fields = 0, n_data_hash_tables = 0, n_field_hash_tables = 0, n_entry_arrays = 0, n_tags = 0; usec_t last_usec = 0; int data_fd = -1, entry_fd = -1, entry_array_fd = -1; char data_path[] = "/var/tmp/journal-data-XXXXXX", entry_path[] = "/var/tmp/journal-entry-XXXXXX", entry_array_path[] = "/var/tmp/journal-entry-array-XXXXXX"; - + unsigned i; + bool found_last; +#ifdef HAVE_GCRYPT + uint64_t last_tag = 0; +#endif assert(f); + if (key) { +#ifdef HAVE_GCRYPT + r = journal_file_parse_verification_key(f, key); + if (r < 0) { + log_error("Failed to parse seed."); + return r; + } +#else + return -ENOTSUP; +#endif + } else if (f->seal) + return -ENOKEY; + data_fd = mkostemp(data_path, O_CLOEXEC); if (data_fd < 0) { log_error("Failed to create data file: %m"); + r = -errno; goto fail; } unlink(data_path); @@ -207,6 +823,7 @@ int journal_file_verify(JournalFile *f, const char *key) { entry_fd = mkostemp(entry_path, O_CLOEXEC); if (entry_fd < 0) { log_error("Failed to create entry file: %m"); + r = -errno; goto fail; } unlink(entry_path); @@ -214,93 +831,107 @@ int journal_file_verify(JournalFile *f, const char *key) { entry_array_fd = mkostemp(entry_array_path, O_CLOEXEC); if (entry_array_fd < 0) { log_error("Failed to create entry array file: %m"); + r = -errno; goto fail; } unlink(entry_array_path); - /* First iteration: we go through all objects, verify the - * superficial structure, headers, hashes. */ - - r = journal_file_hmac_put_header(f); - if (r < 0) { - log_error("Failed to calculate HMAC of header."); +#ifdef HAVE_GCRYPT + if ((le32toh(f->header->compatible_flags) & ~HEADER_COMPATIBLE_SEALED) != 0) +#else + if (f->header->compatible_flags != 0) +#endif + { + log_error("Cannot verify file with unknown extensions."); + r = -ENOTSUP; goto fail; } + for (i = 0; i < sizeof(f->header->reserved); i++) + if (f->header->reserved[i] != 0) { + log_error("Reserved field in non-zero."); + r = -EBADMSG; + goto fail; + } + + /* First iteration: we go through all objects, verify the + * superficial structure, headers, hashes. */ + p = le64toh(f->header->header_size); while (p != 0) { - draw_progress((0x7FFF * p) / le64toh(f->header->tail_object_offset), &last_usec); + if (show_progress) + draw_progress(0x7FFF * p / le64toh(f->header->tail_object_offset), &last_usec); r = journal_file_move_to_object(f, -1, p, &o); if (r < 0) { - log_error("Invalid object at %llu", (unsigned long long) p); + log_error("Invalid object at "OFSfmt, p); goto fail; } - if (le64toh(f->header->tail_object_offset) < p) { - log_error("Invalid tail object pointer."); + if (p > le64toh(f->header->tail_object_offset)) { + log_error("Invalid tail object pointer"); r = -EBADMSG; goto fail; } - n_objects ++; + if (p == le64toh(f->header->tail_object_offset)) + found_last = true; - r = journal_file_object_verify(f, o); - if (r < 0) { - log_error("Invalid object contents at %llu", (unsigned long long) p); - goto fail; - } + n_objects ++; - r = journal_file_hmac_put_object(f, -1, p); + r = journal_file_object_verify(f, p, o); if (r < 0) { - log_error("Failed to calculate HMAC at %llu", (unsigned long long) p); - goto fail; - } - - if (o->object.flags & OBJECT_COMPRESSED && - !(le32toh(f->header->incompatible_flags) & HEADER_INCOMPATIBLE_COMPRESSED)) { - log_error("Compressed object without compression at %llu", (unsigned long long) p); - r = -EBADMSG; + log_error("Invalid object contents at "OFSfmt": %s", p, strerror(-r)); goto fail; } - if (o->object.flags & OBJECT_COMPRESSED && - o->object.type != OBJECT_DATA) { - log_error("Compressed non-data object at %llu", (unsigned long long) p); + if ((o->object.flags & OBJECT_COMPRESSED) && !JOURNAL_HEADER_COMPRESSED(f->header)) { + log_error("Compressed object in file without compression at "OFSfmt, p); r = -EBADMSG; goto fail; } - if (o->object.type == OBJECT_TAG) { + switch (o->object.type) { - if (!(le32toh(f->header->compatible_flags) & HEADER_COMPATIBLE_AUTHENTICATED)) { - log_error("Tag object without authentication at %llu", (unsigned long long) p); - r = -EBADMSG; + case OBJECT_DATA: + r = write_uint64(data_fd, p); + if (r < 0) goto fail; - } - if (le64toh(o->tag.seqnum) != tag_seqnum) { - log_error("Tag sequence number out of synchronization at %llu", (unsigned long long) p); + n_data++; + break; + + case OBJECT_FIELD: + n_fields++; + break; + + case OBJECT_ENTRY: + if (JOURNAL_HEADER_SEALED(f->header) && n_tags <= 0) { + log_error("First entry before first tag at "OFSfmt, p); r = -EBADMSG; goto fail; } - } else if (o->object.type == OBJECT_ENTRY) { - r = write_uint64(entry_fd, p); if (r < 0) goto fail; + if (le64toh(o->entry.realtime) < last_tag_realtime) { + log_error("Older entry after newer tag at "OFSfmt, p); + r = -EBADMSG; + goto fail; + } + if (!entry_seqnum_set && le64toh(o->entry.seqnum) != le64toh(f->header->head_entry_seqnum)) { - log_error("Head entry sequence number incorrect"); + log_error("Head entry sequence number incorrect at "OFSfmt, p); r = -EBADMSG; goto fail; } if (entry_seqnum_set && entry_seqnum >= le64toh(o->entry.seqnum)) { - log_error("Entry sequence number out of synchronization at %llu", (unsigned long long) p); + log_error("Entry sequence number out of synchronization at "OFSfmt, p); r = -EBADMSG; goto fail; } @@ -311,7 +942,7 @@ int journal_file_verify(JournalFile *f, const char *key) { if (entry_monotonic_set && sd_id128_equal(entry_boot_id, o->entry.boot_id) && entry_monotonic > le64toh(o->entry.monotonic)) { - log_error("Entry timestamp out of synchronization at %llu", (unsigned long long) p); + log_error("Entry timestamp out of synchronization at "OFSfmt, p); r = -EBADMSG; goto fail; } @@ -331,15 +962,50 @@ int journal_file_verify(JournalFile *f, const char *key) { entry_realtime_set = true; n_entries ++; - } else if (o->object.type == OBJECT_ENTRY_ARRAY) { + break; + + case OBJECT_DATA_HASH_TABLE: + if (n_data_hash_tables > 1) { + log_error("More than one data hash table at "OFSfmt, p); + r = -EBADMSG; + goto fail; + } + if (le64toh(f->header->data_hash_table_offset) != p + offsetof(HashTableObject, items) || + le64toh(f->header->data_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) { + log_error("Header fields for data hash table invalid"); + r = -EBADMSG; + goto fail; + } + + n_data_hash_tables++; + break; + + case OBJECT_FIELD_HASH_TABLE: + if (n_field_hash_tables > 1) { + log_error("More than one field hash table at "OFSfmt, p); + r = -EBADMSG; + goto fail; + } + + if (le64toh(f->header->field_hash_table_offset) != p + offsetof(HashTableObject, items) || + le64toh(f->header->field_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) { + log_error("Header fields for field hash table invalid"); + r = -EBADMSG; + goto fail; + } + + n_field_hash_tables++; + break; + + case OBJECT_ENTRY_ARRAY: r = write_uint64(entry_array_fd, p); if (r < 0) goto fail; if (p == le64toh(f->header->entry_array_offset)) { if (found_main_entry_array) { - log_error("More than one main entry array at %llu", (unsigned long long) p); + log_error("More than one main entry array at "OFSfmt, p); r = -EBADMSG; goto fail; } @@ -348,49 +1014,99 @@ int journal_file_verify(JournalFile *f, const char *key) { } n_entry_arrays++; + break; - } else if (o->object.type == OBJECT_DATA) { - - r = write_uint64(data_fd, p); - if (r < 0) - goto fail; - - n_data++; - - } else if (o->object.type == OBJECT_FIELD) - n_fields++; - else if (o->object.type == OBJECT_DATA_HASH_TABLE) { - n_data_hash_tables++; - - if (n_data_hash_tables > 1) { - log_error("More than one data hash table at %llu", (unsigned long long) p); + case OBJECT_TAG: + if (!JOURNAL_HEADER_SEALED(f->header)) { + log_error("Tag object in file without sealing at "OFSfmt, p); r = -EBADMSG; goto fail; } - if (le64toh(f->header->data_hash_table_offset) != p + offsetof(HashTableObject, items) || - le64toh(f->header->data_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) { - log_error("Header fields for data hash table invalid."); + if (le64toh(o->tag.seqnum) != n_tags + 1) { + log_error("Tag sequence number out of synchronization at "OFSfmt, p); r = -EBADMSG; goto fail; } - } else if (o->object.type == OBJECT_FIELD_HASH_TABLE) { - n_field_hash_tables++; - if (n_field_hash_tables > 1) { - log_error("More than one field hash table at %llu", (unsigned long long) p); + if (le64toh(o->tag.epoch) < last_epoch) { + log_error("Epoch sequence out of synchronization at "OFSfmt, p); r = -EBADMSG; goto fail; } - if (le64toh(f->header->field_hash_table_offset) != p + offsetof(HashTableObject, items) || - le64toh(f->header->field_hash_table_size) != le64toh(o->object.size) - offsetof(HashTableObject, items)) { - log_error("Header fields for field hash table invalid."); - r = -EBADMSG; - goto fail; +#ifdef HAVE_GCRYPT + if (f->seal) { + uint64_t q, rt; + + log_debug("Checking tag %"PRIu64"...", le64toh(o->tag.seqnum)); + + rt = f->fss_start_usec + o->tag.epoch * f->fss_interval_usec; + if (entry_realtime_set && entry_realtime >= rt + f->fss_interval_usec) { + log_error("Tag/entry realtime timestamp out of synchronization at "OFSfmt, p); + r = -EBADMSG; + goto fail; + } + + /* OK, now we know the epoch. So let's now set + * it, and calculate the HMAC for everything + * since the last tag. */ + r = journal_file_fsprg_seek(f, le64toh(o->tag.epoch)); + if (r < 0) + goto fail; + + r = journal_file_hmac_start(f); + if (r < 0) + goto fail; + + if (last_tag == 0) { + r = journal_file_hmac_put_header(f); + if (r < 0) + goto fail; + + q = le64toh(f->header->header_size); + } else + q = last_tag; + + while (q <= p) { + r = journal_file_move_to_object(f, -1, q, &o); + if (r < 0) + goto fail; + + r = journal_file_hmac_put_object(f, -1, o, q); + if (r < 0) + goto fail; + + q = q + ALIGN64(le64toh(o->object.size)); + } + + /* Position might have changed, let's reposition things */ + r = journal_file_move_to_object(f, -1, p, &o); + if (r < 0) + goto fail; + + if (memcmp(o->tag.tag, gcry_md_read(f->hmac, 0), TAG_LENGTH) != 0) { + log_error("Tag failed verification at "OFSfmt, p); + r = -EBADMSG; + goto fail; + } + + f->hmac_running = false; + last_tag_realtime = rt; + last_sealed_realtime = entry_realtime; } - } else if (o->object.type >= _OBJECT_TYPE_MAX) + + last_tag = p + ALIGN64(le64toh(o->object.size)); +#endif + + last_epoch = le64toh(o->tag.epoch); + + n_tags ++; + break; + + default: n_weird ++; + } if (p == le64toh(f->header->tail_object_offset)) p = 0; @@ -398,6 +1114,12 @@ int journal_file_verify(JournalFile *f, const char *key) { p = p + ALIGN64(le64toh(o->object.size)); } + if (!found_last) { + log_error("Tail object pointer dead"); + r = -EBADMSG; + goto fail; + } + if (n_objects != le64toh(f->header->n_objects)) { log_error("Object number mismatch"); r = -EBADMSG; @@ -425,12 +1147,19 @@ int journal_file_verify(JournalFile *f, const char *key) { } if (JOURNAL_HEADER_CONTAINS(f->header, n_tags) && - tag_seqnum != le64toh(f->header->n_tags)) { + n_tags != le64toh(f->header->n_tags)) { log_error("Tag number mismatch"); r = -EBADMSG; goto fail; } + if (JOURNAL_HEADER_CONTAINS(f->header, n_entry_arrays) && + n_entry_arrays != le64toh(f->header->n_entry_arrays)) { + log_error("Entry array number mismatch"); + r = -EBADMSG; + goto fail; + } + if (n_data_hash_tables != 1) { log_error("Missing data hash table"); r = -EBADMSG; @@ -470,55 +1199,34 @@ int journal_file_verify(JournalFile *f, const char *key) { goto fail; } - /* Second iteration: we go through all objects again, this - * time verify all pointers. */ - - p = le64toh(f->header->header_size); - while (p != 0) { - draw_progress(0x8000 + (0x7FFF * p) / le64toh(f->header->tail_object_offset), &last_usec); - - r = journal_file_move_to_object(f, -1, p, &o); - if (r < 0) { - log_error("Invalid object at %llu", (unsigned long long) p); - goto fail; - } - - if (o->object.type == OBJECT_ENTRY_ARRAY) { - uint64_t i = 0, n; - - if (le64toh(o->entry_array.next_entry_array_offset) != 0 && - !contains_uint64(f->mmap, entry_array_fd, n_entry_arrays, le64toh(o->entry_array.next_entry_array_offset))) { - log_error("Entry array chains up to invalid next array at %llu", (unsigned long long) p); - r = -EBADMSG; - goto fail; - } - - n = journal_file_entry_array_n_items(o); - for (i = 0; i < n; i++) { - if (le64toh(o->entry_array.items[i]) != 0 && - !contains_uint64(f->mmap, entry_fd, n_entries, le64toh(o->entry_array.items[i]))) { - - log_error("Entry array points to invalid next array at %llu", (unsigned long long) p); - r = -EBADMSG; - goto fail; - } - } - - } - - r = journal_file_move_to_object(f, -1, p, &o); - if (r < 0) { - log_error("Invalid object at %llu", (unsigned long long) p); - 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; - if (p == le64toh(f->header->tail_object_offset)) - p = 0; - else - p = p + ALIGN64(le64toh(o->object.size)); - } + 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; - flush_progress(); + if (show_progress) + flush_progress(); mmap_cache_close_fd(f->mmap, data_fd); mmap_cache_close_fd(f->mmap, entry_fd); @@ -528,16 +1236,24 @@ int journal_file_verify(JournalFile *f, const char *key) { close_nointr_nofail(entry_fd); close_nointr_nofail(entry_array_fd); + if (first_contained) + *first_contained = le64toh(f->header->head_entry_realtime); + if (last_validated) + *last_validated = last_sealed_realtime; + if (last_contained) + *last_contained = le64toh(f->header->tail_entry_realtime); + return 0; fail: - flush_progress(); + if (show_progress) + flush_progress(); - log_error("File corruption detected at %s:%llu (of %llu, %llu%%).", + log_error("File corruption detected at %s:"OFSfmt" (of %llu bytes, %"PRIu64"%%).", f->path, - (unsigned long long) p, + p, (unsigned long long) f->last_stat.st_size, - (unsigned long long) (100 * p / f->last_stat.st_size)); + 100 * p / f->last_stat.st_size); if (data_fd >= 0) { mmap_cache_close_fd(f->mmap, data_fd);