assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
if (!f->hmac_running)
return 0;
- log_debug("Writing tag for epoch %llu\n", (unsigned long long) FSPRG_GetEpoch(f->fsprg_state));
-
assert(f->hmac);
r = journal_file_append_object(f, OBJECT_TAG, sizeof(struct TagObject), &o, &p);
o->tag.seqnum = htole64(journal_file_tag_seqnum(f));
o->tag.epoch = htole64(FSPRG_GetEpoch(f->fsprg_state));
+ log_debug("Writing tag %"PRIu64" for epoch %"PRIu64"",
+ le64toh(o->tag.seqnum),
+ FSPRG_GetEpoch(f->fsprg_state));
+
/* Add the tag object itself, so that we can protect its
* header. This will exclude the actual hash value in it */
- r = journal_file_hmac_put_object(f, OBJECT_TAG, p);
+ r = journal_file_hmac_put_object(f, OBJECT_TAG, o, p);
if (r < 0)
return r;
uint8_t key[256 / 8]; /* Let's pass 256 bit from FSPRG to HMAC */
assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
if (f->hmac_running)
assert(f);
assert(epoch);
- assert(f->authenticate);
+ assert(f->seal);
- if (f->fsprg_start_usec == 0 ||
- f->fsprg_interval_usec == 0)
+ if (f->fss_start_usec == 0 ||
+ f->fss_interval_usec == 0)
return -ENOTSUP;
- if (realtime < f->fsprg_start_usec)
+ if (realtime < f->fss_start_usec)
return -ESTALE;
- t = realtime - f->fsprg_start_usec;
- t = t / f->fsprg_interval_usec;
+ t = realtime - f->fss_start_usec;
+ t = t / f->fss_interval_usec;
*epoch = t;
return 0;
}
-static int journal_file_need_evolve(JournalFile *f, uint64_t realtime) {
+static int journal_file_fsprg_need_evolve(JournalFile *f, uint64_t realtime) {
uint64_t goal, epoch;
int r;
assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
r = journal_file_get_epoch(f, realtime, &goal);
return epoch != goal;
}
-static int journal_file_evolve(JournalFile *f, uint64_t realtime) {
+int journal_file_fsprg_evolve(JournalFile *f, uint64_t realtime) {
uint64_t goal, epoch;
int r;
assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
r = journal_file_get_epoch(f, realtime, &goal);
epoch = FSPRG_GetEpoch(f->fsprg_state);
if (epoch < goal)
- log_debug("Evolving FSPRG key from epoch %llu to %llu.", (unsigned long long) epoch, (unsigned long long) goal);
+ log_debug("Evolving FSPRG key from epoch %"PRIu64" to %"PRIu64".", epoch, goal);
for (;;) {
if (epoch > goal)
assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
assert(f->fsprg_seed);
return -ENOMEM;
}
- log_debug("Seeking FSPRG key to %llu.", (unsigned long long) goal);
+ log_debug("Seeking FSPRG key to %"PRIu64".", goal);
msk = alloca(FSPRG_mskinbytes(FSPRG_RECOMMENDED_SECPAR));
FSPRG_GenMK(msk, NULL, f->fsprg_seed, f->fsprg_seed_size, FSPRG_RECOMMENDED_SECPAR);
assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
- r = journal_file_need_evolve(f, realtime);
+ if (realtime <= 0)
+ realtime = now(CLOCK_REALTIME);
+
+ r = journal_file_fsprg_need_evolve(f, realtime);
if (r <= 0)
return 0;
if (r < 0)
return r;
- r = journal_file_evolve(f, realtime);
- if (r < 0)
- return r;
-
- r = journal_file_hmac_start(f);
+ r = journal_file_fsprg_evolve(f, realtime);
if (r < 0)
return r;
return 0;
}
-int journal_file_hmac_put_object(JournalFile *f, int type, uint64_t p) {
+int journal_file_hmac_put_object(JournalFile *f, int type, Object *o, uint64_t p) {
int r;
- Object *o;
assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
r = journal_file_hmac_start(f);
if (r < 0)
return r;
- r = journal_file_move_to_object(f, type, p, &o);
- if (r < 0)
- return r;
+ if (!o) {
+ r = journal_file_move_to_object(f, type, p, &o);
+ if (r < 0)
+ return r;
+ } else {
+ if (type >= 0 && o->object.type != type)
+ return -EBADMSG;
+ }
gcry_md_write(f->hmac, o, offsetof(ObjectHeader, payload));
gcry_md_write(f->hmac, o->data.payload, le64toh(o->object.size) - offsetof(DataObject, payload));
break;
+ case OBJECT_FIELD:
+ /* Same here */
+ gcry_md_write(f->hmac, &o->field.hash, sizeof(o->field.hash));
+ gcry_md_write(f->hmac, o->field.payload, le64toh(o->object.size) - offsetof(FieldObject, payload));
+ break;
+
case OBJECT_ENTRY:
/* All */
gcry_md_write(f->hmac, &o->entry.seqnum, le64toh(o->object.size) - offsetof(EntryObject, seqnum));
assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
r = journal_file_hmac_start(f);
return 0;
}
-int journal_file_load_fsprg(JournalFile *f) {
+int journal_file_fss_load(JournalFile *f) {
int r, fd = -1;
char *p = NULL;
struct stat st;
- FSPRGHeader *m = NULL;
+ FSSHeader *m = NULL;
sd_id128_t machine;
assert(f);
- if (!f->authenticate)
+ if (!f->seal)
return 0;
r = sd_id128_get_machine(&machine);
if (r < 0)
return r;
- if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/fsprg",
+ if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/fss",
SD_ID128_FORMAT_VAL(machine)) < 0)
return -ENOMEM;
fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY, 0600);
if (fd < 0) {
- log_error("Failed to open %s: %m", p);
+ if (errno != ENOENT)
+ log_error("Failed to open %s: %m", p);
+
r = -errno;
goto finish;
}
goto finish;
}
- if (st.st_size < (off_t) sizeof(FSPRGHeader)) {
+ if (st.st_size < (off_t) sizeof(FSSHeader)) {
r = -ENODATA;
goto finish;
}
- m = mmap(NULL, PAGE_ALIGN(sizeof(FSPRGHeader)), PROT_READ, MAP_SHARED, fd, 0);
+ m = mmap(NULL, PAGE_ALIGN(sizeof(FSSHeader)), PROT_READ, MAP_SHARED, fd, 0);
if (m == MAP_FAILED) {
m = NULL;
r = -errno;
goto finish;
}
- if (memcmp(m->signature, FSPRG_HEADER_SIGNATURE, 8) != 0) {
+ if (memcmp(m->signature, FSS_HEADER_SIGNATURE, 8) != 0) {
r = -EBADMSG;
goto finish;
}
goto finish;
}
- if (le64toh(m->header_size) < sizeof(FSPRGHeader)) {
+ if (le64toh(m->header_size) < sizeof(FSSHeader)) {
r = -EBADMSG;
goto finish;
}
- if (le64toh(m->state_size) != FSPRG_stateinbytes(m->secpar)) {
+ if (le64toh(m->fsprg_state_size) != FSPRG_stateinbytes(le16toh(m->fsprg_secpar))) {
r = -EBADMSG;
goto finish;
}
- f->fsprg_file_size = le64toh(m->header_size) + le64toh(m->state_size);
- if ((uint64_t) st.st_size < f->fsprg_file_size) {
+ f->fss_file_size = le64toh(m->header_size) + le64toh(m->fsprg_state_size);
+ if ((uint64_t) st.st_size < f->fss_file_size) {
r = -ENODATA;
goto finish;
}
goto finish;
}
- if (le64toh(m->fsprg_start_usec) <= 0 ||
- le64toh(m->fsprg_interval_usec) <= 0) {
+ if (le64toh(m->start_usec) <= 0 ||
+ le64toh(m->interval_usec) <= 0) {
r = -EBADMSG;
goto finish;
}
- f->fsprg_file = mmap(NULL, PAGE_ALIGN(f->fsprg_file_size), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
- if (f->fsprg_file == MAP_FAILED) {
- f->fsprg_file = NULL;
+ f->fss_file = mmap(NULL, PAGE_ALIGN(f->fss_file_size), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ if (f->fss_file == MAP_FAILED) {
+ f->fss_file = NULL;
r = -errno;
goto finish;
}
- f->fsprg_start_usec = le64toh(f->fsprg_file->fsprg_start_usec);
- f->fsprg_interval_usec = le64toh(f->fsprg_file->fsprg_interval_usec);
+ f->fss_start_usec = le64toh(f->fss_file->start_usec);
+ f->fss_interval_usec = le64toh(f->fss_file->interval_usec);
- f->fsprg_state = (uint8_t*) f->fsprg_file + le64toh(f->fsprg_file->header_size);
- f->fsprg_state_size = le64toh(f->fsprg_file->state_size);
+ f->fsprg_state = (uint8_t*) f->fss_file + le64toh(f->fss_file->header_size);
+ f->fsprg_state_size = le64toh(f->fss_file->fsprg_state_size);
r = 0;
finish:
if (m)
- munmap(m, PAGE_ALIGN(sizeof(FSPRGHeader)));
-
- if (fd >= 0)
- close_nointr_nofail(fd);
+ munmap(m, PAGE_ALIGN(sizeof(FSSHeader)));
+ safe_close(fd);
free(p);
+
return r;
}
-int journal_file_setup_hmac(JournalFile *f) {
+static void initialize_libgcrypt(void) {
+ const char *p;
+
+ if (gcry_control(GCRYCTL_INITIALIZATION_FINISHED_P))
+ return;
+
+ p = gcry_check_version("1.4.5");
+ assert(p);
+
+ gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
+}
+
+int journal_file_hmac_setup(JournalFile *f) {
gcry_error_t e;
- if (!f->authenticate)
+ if (!f->seal)
return 0;
+ initialize_libgcrypt();
+
e = gcry_md_open(&f->hmac, GCRY_MD_SHA256, GCRY_MD_FLAG_HMAC);
if (e != 0)
return -ENOTSUP;
int r;
uint64_t p;
- if (!f->authenticate)
+ if (!f->seal)
return 0;
log_debug("Calculating first tag...");
return -EINVAL;
p -= offsetof(Object, hash_table.items);
- r = journal_file_hmac_put_object(f, OBJECT_FIELD_HASH_TABLE, p);
+ r = journal_file_hmac_put_object(f, OBJECT_FIELD_HASH_TABLE, NULL, p);
if (r < 0)
return r;
return -EINVAL;
p -= offsetof(Object, hash_table.items);
- r = journal_file_hmac_put_object(f, OBJECT_DATA_HASH_TABLE, p);
+ r = journal_file_hmac_put_object(f, OBJECT_DATA_HASH_TABLE, NULL, p);
if (r < 0)
return r;
return 0;
}
-bool journal_file_fsprg_enabled(JournalFile *f) {
+int journal_file_parse_verification_key(JournalFile *f, const char *key) {
+ uint8_t *seed;
+ size_t seed_size, c;
+ const char *k;
+ int r;
+ unsigned long long start, interval;
+
+ seed_size = FSPRG_RECOMMENDED_SEEDLEN;
+ seed = malloc(seed_size);
+ if (!seed)
+ return -ENOMEM;
+
+ k = key;
+ for (c = 0; c < seed_size; c++) {
+ int x, y;
+
+ while (*k == '-')
+ k++;
+
+ x = unhexchar(*k);
+ if (x < 0) {
+ free(seed);
+ return -EINVAL;
+ }
+ k++;
+ y = unhexchar(*k);
+ if (y < 0) {
+ free(seed);
+ return -EINVAL;
+ }
+ k++;
+
+ seed[c] = (uint8_t) (x * 16 + y);
+ }
+
+ if (*k != '/') {
+ free(seed);
+ return -EINVAL;
+ }
+ k++;
+
+ r = sscanf(k, "%llx-%llx", &start, &interval);
+ if (r != 2) {
+ free(seed);
+ return -EINVAL;
+ }
+
+ f->fsprg_seed = seed;
+ f->fsprg_seed_size = seed_size;
+
+ f->fss_start_usec = start * interval;
+ f->fss_interval_usec = interval;
+
+ return 0;
+}
+
+bool journal_file_next_evolve_usec(JournalFile *f, usec_t *u) {
+ uint64_t epoch;
+
assert(f);
+ assert(u);
+
+ if (!f->seal)
+ return false;
+
+ epoch = FSPRG_GetEpoch(f->fsprg_state);
+
+ *u = (usec_t) (f->fss_start_usec + f->fss_interval_usec * epoch + f->fss_interval_usec);
- return !!(le32toh(f->header->compatible_flags) & HEADER_COMPATIBLE_AUTHENTICATED);
+ return true;
}