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hs: Fix ADD_ONION with client authorization

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Turns out that passing client authorization keys to ADD_ONION for v3 was
not working because we were not setting the "is_client_auth_enabled"
flag to true once the clients were configured. This lead to the
descriptor being encoded without the clients.

This patch removes that flag and instead adds an inline function that
can be used to check if a given service has client authorization
enabled.

This will be much less error prone of needing to keep in sync the client
list and a flag instead.

Fixes #40378

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2021-05-04 10:37:26 -04:00
parent f0260c4cea
commit cf6e72b702
4 changed files with 15 additions and 17 deletions
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4
changes/ticket40378 Normal file
View File

@ -0,0 +1,4 @@
o Major bugfixes (onion service, control port):
- Make the ADD_ONION command properly configure client authorization. Before
this fix, the created onion failed to add the client(s). Fixes bug 40378;
bugfix on 0.4.6.1-alpha.

18
src/feature/hs/hs_service.c
View File

@ -160,6 +160,15 @@ HT_GENERATE2(hs_service_ht, hs_service_t, hs_service_node,
hs_service_ht_hash, hs_service_ht_eq,
0.6, tor_reallocarray, tor_free_);
/** Return true iff the given service has client authorization configured that
* is the client list is non empty. */
static inline bool
is_client_auth_enabled(const hs_service_t *service)
{
return (service->config.clients != NULL &&
smartlist_len(service->config.clients) > 0);
}
/** Query the given service map with a public key and return a service object
* if found else NULL. It is also possible to set a directory path in the
* search query. If pk is NULL, then it will be set to zero indicating the
@ -1302,11 +1311,6 @@ load_client_keys(hs_service_t *service)
} SMARTLIST_FOREACH_END(filename);
/* If the number of clients is greater than zero, set the flag to be true. */
if (smartlist_len(config->clients) > 0) {
config->is_client_auth_enabled = 1;
}
/* Success. */
ret = 0;
end:
@ -1816,7 +1820,7 @@ build_service_desc_superencrypted(const hs_service_t *service,
/* We do not need to build the desc authorized client if the client
* authorization is disabled */
if (config->is_client_auth_enabled) {
if (is_client_auth_enabled(service)) {
SMARTLIST_FOREACH_BEGIN(config->clients,
hs_service_authorized_client_t *, client) {
hs_desc_authorized_client_t *desc_client;
@ -3588,7 +3592,7 @@ service_encode_descriptor(const hs_service_t *service,
/* If the client authorization is enabled, send the descriptor cookie to
* hs_desc_encode_descriptor. Otherwise, send NULL */
if (service->config.is_client_auth_enabled) {
if (is_client_auth_enabled(service)) {
descriptor_cookie = desc->descriptor_cookie;
}

3
src/feature/hs/hs_service.h
View File

@ -230,9 +230,6 @@ typedef struct hs_service_config_t {
* HiddenServiceNumIntroductionPoints option. */
unsigned int num_intro_points;
/** True iff the client auth is enabled. */
unsigned int is_client_auth_enabled : 1;
/** List of hs_service_authorized_client_t's of clients that may access this
* service. Specified by HiddenServiceAuthorizeClient option. */
smartlist_t *clients;

7
src/test/test_hs_service.c
View File

@ -341,7 +341,6 @@ helper_create_service_with_clients(int num_clients)
int i;
hs_service_t *service = helper_create_service();
tt_assert(service);
service->config.is_client_auth_enabled = 1;
service->config.clients = smartlist_new();
for (i = 0; i < num_clients; i++) {
@ -425,9 +424,6 @@ test_load_keys(void *arg)
tt_int_op(hs_address_is_valid(addr), OP_EQ, 1);
tt_str_op(addr, OP_EQ, s->onion_address);
/* Check that the is_client_auth_enabled is not set. */
tt_assert(!s->config.is_client_auth_enabled);
done:
tor_free(hsdir_v3);
hs_free_all();
@ -577,9 +573,6 @@ test_load_keys_with_client_auth(void *arg)
tt_int_op(smartlist_len(service->config.clients), OP_EQ,
smartlist_len(pubkey_b32_list));
/* Test that the is_client_auth_enabled flag is set. */
tt_assert(service->config.is_client_auth_enabled);
/* Test that the keys in clients are correct. */
SMARTLIST_FOREACH_BEGIN(pubkey_b32_list, char *, pubkey_b32) {