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hs-v2: Disable version 2 directory

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Relay do not accept both stores and lookups of version 2 descriptor.
This effectively disable version 2 HSDir supports for relays.

Part of #40476

Signed-off-by: David Goulet <dgoulet@torproject.org>
This commit is contained in:
David Goulet 2021-09-30 10:46:17 -04:00
parent e284b9f779
commit a7d28da272
1 changed files with 3 additions and 58 deletions
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61
src/feature/dircache/dircache.c
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@ -356,8 +356,6 @@ static int handle_get_descriptor(dir_connection_t *conn,
const get_handler_args_t *args);
static int handle_get_keys(dir_connection_t *conn,
const get_handler_args_t *args);
static int handle_get_hs_descriptor_v2(dir_connection_t *conn,
const get_handler_args_t *args);
static int handle_get_robots(dir_connection_t *conn,
const get_handler_args_t *args);
static int handle_get_networkstatus_bridges(dir_connection_t *conn,
@ -376,7 +374,6 @@ static const url_table_ent_t url_table[] = {
{ "/tor/server/", 1, handle_get_descriptor },
{ "/tor/extra/", 1, handle_get_descriptor },
{ "/tor/keys/", 1, handle_get_keys },
{ "/tor/rendezvous2/", 1, handle_get_hs_descriptor_v2 },
{ "/tor/hs/3/", 1, handle_get_hs_descriptor_v3 },
{ "/tor/robots.txt", 0, handle_get_robots },
{ "/tor/networkstatus-bridges", 0, handle_get_networkstatus_bridges },
@ -1350,45 +1347,7 @@ handle_get_keys(dir_connection_t *conn, const get_handler_args_t *args)
return 0;
}
/** Helper function for GET /tor/rendezvous2/
*/
static int
handle_get_hs_descriptor_v2(dir_connection_t *conn,
const get_handler_args_t *args)
{
const char *url = args->url;
if (connection_dir_is_encrypted(conn)) {
/* Handle v2 rendezvous descriptor fetch request. */
const char *descp;
const char *query = url + strlen("/tor/rendezvous2/");
if (rend_valid_descriptor_id(query)) {
log_info(LD_REND, "Got a v2 rendezvous descriptor request for ID '%s'",
safe_str(escaped(query)));
switch (rend_cache_lookup_v2_desc_as_dir(query, &descp)) {
case 1: /* valid */
write_http_response_header(conn, strlen(descp), NO_METHOD, 0);
connection_buf_add(descp, strlen(descp), TO_CONN(conn));
break;
case 0: /* well-formed but not present */
write_short_http_response(conn, 404, "Not found");
break;
case -1: /* not well-formed */
write_short_http_response(conn, 400, "Bad request");
break;
}
} else { /* not well-formed */
write_short_http_response(conn, 400, "Bad request");
}
goto done;
} else {
/* Not encrypted! */
write_short_http_response(conn, 404, "Not found");
}
done:
return 0;
}
/** Helper function for GET `/tor/hs/3/...`. Only for version 3.
/** Helper function for GET /tor/hs/3/<z>. Only for version 3.
*/
STATIC int
handle_get_hs_descriptor_v3(dir_connection_t *conn,
@ -1611,6 +1570,8 @@ directory_handle_command_post,(dir_connection_t *conn, const char *headers,
char *url = NULL;
const or_options_t *options = get_options();
(void) body_len;
log_debug(LD_DIRSERV,"Received POST command.");
conn->base_.state = DIR_CONN_STATE_SERVER_WRITING;
@ -1629,22 +1590,6 @@ directory_handle_command_post,(dir_connection_t *conn, const char *headers,
}
log_debug(LD_DIRSERV,"rewritten url as '%s'.", escaped(url));
/* Handle v2 rendezvous service publish request. */
if (connection_dir_is_encrypted(conn) &&
!strcmpstart(url,"/tor/rendezvous2/publish")) {
if (rend_cache_store_v2_desc_as_dir(body) < 0) {
log_warn(LD_REND, "Rejected v2 rend descriptor (body size %d) from %s.",
(int)body_len,
connection_describe_peer(TO_CONN(conn)));
write_short_http_response(conn, 400,
"Invalid v2 service descriptor rejected");
} else {
write_short_http_response(conn, 200, "Service descriptor (v2) stored");
log_info(LD_REND, "Handled v2 rendezvous descriptor post: accepted");
}
goto done;
}
/* Handle HS descriptor publish request. We force an anonymous connection
* (which also tests for encrypted). We do not allow single-hop client to
* post a descriptor onto an HSDir. */