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Fix issues pointed out by Nick.

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- Loose the asserts on num_pkeys.
- Straighten some dangling &.
- Fix some unpredictable memcpys.
This commit is contained in:
George Kadianakis 2020-02-18 12:37:34 +02:00
parent 901ed35709
commit 975102869a
2 changed files with 18 additions and 14 deletions
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3
src/feature/hs/hs_client.c
View File

@ -1837,8 +1837,7 @@ hs_client_decode_descriptor(const char *desc_str,
uint64_t current_time_period = hs_get_time_period_num(0);
hs_build_blinded_pubkey(service_identity_pk, NULL, 0, current_time_period,
&blinded_pubkey);
hs_get_subcredential(service_identity_pk, &blinded_pubkey, &
subcredential);
hs_get_subcredential(service_identity_pk, &blinded_pubkey, &subcredential);
}
/* Parse descriptor */

29
src/feature/hs/hs_ob.c
View File

@ -262,8 +262,8 @@ hs_ob_parse_config_file(hs_service_config_t *config)
return ret;
}
/** Compute all possible subcredentials for every onion master key in the
* given service config object. The subcredentials is allocated and set as an
/** Compute all possible subcredentials for every onion master key in the given
* service config object. subcredentials_out is allocated and set as an
* continous array containing all possible values.
*
* On success, return the number of subcredential put in the array which will
@ -271,12 +271,12 @@ hs_ob_parse_config_file(hs_service_config_t *config)
* length of a single subcredential.
*
* If the given configuration object has no OB master keys configured, 0 is
* returned and subcredentials is set to NULL.
* returned and subcredentials_out is set to NULL.
*
* Otherwise, this can't fail. */
STATIC size_t
compute_subcredentials(const hs_service_t *service,
hs_subcredential_t **subcredentials)
hs_subcredential_t **subcredentials_out)
{
unsigned int num_pkeys, idx = 0;
hs_subcredential_t *subcreds = NULL;
@ -285,14 +285,17 @@ compute_subcredentials(const hs_service_t *service,
const uint64_t tp = hs_get_time_period_num(0);
tor_assert(service);
tor_assert(subcredentials);
tor_assert(subcredentials_out);
/* Our caller has checked these too */
tor_assert(service->desc_current);
tor_assert(service->desc_next);
/* Our caller made sure that we are an OB instance */
num_pkeys = smartlist_len(service->config.ob_master_pubkeys);
tor_assert(num_pkeys > 0);
if (!num_pkeys) {
subcredentials_out = NULL;
return 0;
}
/* Time to build all the subcredentials for each time period: two for each
* instance descriptor plus three for the onionbalance frontend service: the
@ -335,15 +338,15 @@ compute_subcredentials(const hs_service_t *service,
/* And then in the end we add the two subcredentials of the current active
* instance descriptors */
memcpy(&subcreds[idx++],
service->desc_current->desc->subcredential.subcred, SUBCRED_LEN);
memcpy(&subcreds[idx++],
service->desc_next->desc->subcredential.subcred, SUBCRED_LEN);
memcpy(&subcreds[idx++], &service->desc_current->desc->subcredential,
sizeof(hs_subcredential_t));
memcpy(&subcreds[idx++], &service->desc_next->desc->subcredential,
sizeof(hs_subcredential_t));
log_info(LD_REND, "Refreshing %u onionbalance keys (TP #%d).",
idx, (int)tp);
*subcredentials = subcreds;
*subcredentials_out = subcreds;
return idx;
}
@ -384,7 +387,9 @@ hs_ob_refresh_keys(hs_service_t *service)
/* Get a new set of subcreds */
num_subcreds = compute_subcredentials(service, &ob_subcreds);
tor_assert(num_subcreds > 0);
if (BUG(!num_subcreds)) {
return;
}
/* Delete old subcredentials if any */
if (service->ob_subcreds) {