nihilist/tor
1
0
Fork 0
mirror of https://gitlab.torproject.org/tpo/core/tor.git synced 2024-11-27 22:03:31 +01:00
Code Issues Packages Projects Releases Wiki Activity

Make PreferTunneledDirConns and TunnelDirConns work even when

Browse Source 
we have no cached directory info. This means Tor clients can now
do all of their connections protected by TLS.


svn:r10035
This commit is contained in:
Roger Dingledine 2007-04-27 10:26:09 +00:00
parent 3d00738ec7
commit 397afcc3f6
6 changed files with 53 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
ChangeLog
View File

@ -10,6 +10,9 @@ Changes in version 0.2.0.1-alpha - 2007-??-??
especially on platforms where malloc() is inefficient.
- Stop reading on edge connections when their corresponding circuit
buffers are full; start again as the circuits empty out.
- Make PreferTunneledDirConns and TunnelDirConns work even when
we have no cached directory info. This means Tor clients can now
do all of their connections protected by TLS.
o Security fixes:
- Directory authorities now call routers stable if they have an

10
src/or/circuituse.c
View File

@ -91,10 +91,18 @@ circuit_is_acceptable(circuit_t *circ, edge_connection_t *conn,
log_debug(LD_CIRC,"Skipping one-hop circuit.");
return 0;
}
tor_assert(conn->chosen_exit_name);
if (build_state->chosen_exit) {
char digest[DIGEST_LEN];
if (hexdigest_to_digest(conn->chosen_exit_name, digest) < 0 ||
memcmp(digest, build_state->chosen_exit->identity_digest,
DIGEST_LEN))
return 0; /* this is a circuit to somewhere else */
}
} else {
if (conn->socks_request->command == SOCKS_COMMAND_CONNECT_DIR) {
/* don't use three-hop circuits -- that could hurt our anonymity. */
log_debug(LD_CIRC,"Skipping multi-hop circuit for CONNECT_DIR.");
// log_debug(LD_CIRC,"Skipping multi-hop circuit for CONNECT_DIR.");
return 0;
}
}

11
src/or/directory.c
View File

@ -248,7 +248,8 @@ directory_initiate_command_routerstatus(routerstatus_t *status,
tor_inet_ntoa(&in, address_buf, sizeof(address_buf));
address = address_buf;
}
directory_initiate_command(address, status->addr, status->dir_port,
directory_initiate_command(address, status->addr,
status->or_port, status->dir_port,
status->version_supports_begindir,
status->identity_digest,
purpose, private_connection, resource,
@ -365,7 +366,8 @@ connection_dir_download_routerdesc_failed(dir_connection_t *conn)
* <b>digest</b>. */
void
directory_initiate_command(const char *address, uint32_t addr,
uint16_t dir_port, int supports_begindir,
uint16_t or_port, uint16_t dir_port,
int supports_begindir,
const char *digest, uint8_t purpose,
int private_connection, const char *resource,
const char *payload, size_t payload_len)
@ -373,7 +375,8 @@ directory_initiate_command(const char *address, uint32_t addr,
dir_connection_t *conn;
or_options_t *options = get_options();
int want_to_tunnel = options->TunnelDirConns && supports_begindir &&
router_get_by_digest(digest);
!private_connection && or_port &&
fascist_firewall_allows_address_or(addr, or_port);
tor_assert(address);
tor_assert(addr);
@ -414,7 +417,7 @@ directory_initiate_command(const char *address, uint32_t addr,
/* set up conn so it's got all the data we need to remember */
conn->_base.addr = addr;
conn->_base.port = dir_port;
conn->_base.port = want_to_tunnel ? or_port : dir_port;
conn->_base.address = tor_strdup(address);
memcpy(conn->identity_digest, digest, DIGEST_LEN);

4
src/or/or.h
View File

@ -2487,7 +2487,8 @@ int connection_dir_finished_flushing(dir_connection_t *conn);
int connection_dir_finished_connecting(dir_connection_t *conn);
void connection_dir_request_failed(dir_connection_t *conn);
void directory_initiate_command(const char *address, uint32_t addr,
uint16_t dir_port, int supports_begindir,
uint16_t or_port, uint16_t dir_port,
int supports_begindir,
const char *digest, uint8_t purpose,
int private_connection, const char *resource,
const char *payload, size_t payload_len);
@ -3021,6 +3022,7 @@ routerinfo_t *router_choose_random_node(const char *preferred,
int weight_for_exit);
routerinfo_t *router_get_by_nickname(const char *nickname,
int warn_if_unnamed);
int hexdigest_to_digest(const char *hexdigest, char *digest);
routerinfo_t *router_get_by_hexdigest(const char *hexdigest);
routerinfo_t *router_get_by_digest(const char *digest);
signed_descriptor_t *router_get_by_descriptor_digest(const char *digest);

3
src/or/router.c
View File

@ -507,7 +507,8 @@ consider_testing_reachability(int test_or, int test_dir)
CONN_TYPE_DIR, me->addr, me->dir_port,
DIR_PURPOSE_FETCH_SERVERDESC)) {
/* ask myself, via tor, for my server descriptor. */
directory_initiate_command(me->address, me->addr, me->dir_port,
directory_initiate_command(me->address, me->addr,
me->or_port, me->dir_port,
0, me->cache_info.identity_digest,
DIR_PURPOSE_FETCH_SERVERDESC,
1, "authority", NULL, 0);

45
src/or/routerlist.c
View File

@ -574,16 +574,15 @@ router_pick_directory_server_impl(int requireother, int fascistfirewall,
is_trusted = router_digest_is_trusted_dir(status->identity_digest);
if (for_v2_directory && !(status->is_v2_dir || is_trusted))
continue;
if (fascistfirewall &&
prefer_tunnel &&
if (prefer_tunnel &&
status->version_supports_begindir &&
router_get_by_digest(status->identity_digest) &&
fascist_firewall_allows_address_or(status->addr, status->or_port))
(!fascistfirewall ||
fascist_firewall_allows_address_or(status->addr, status->or_port)))
smartlist_add(is_trusted ? trusted_tunnel :
is_overloaded ? overloaded_tunnel : tunnel, status);
else if (!fascistfirewall || (fascistfirewall &&
else if (!fascistfirewall ||
fascist_firewall_allows_address_dir(status->addr,
status->dir_port)))
status->dir_port))
smartlist_add(is_trusted ? trusted_direct :
is_overloaded ? overloaded_direct : direct, status);
});
@ -652,17 +651,14 @@ router_pick_trusteddirserver_impl(authority_type_t type,
continue;
if (requireother && me && router_digest_is_me(d->digest))
continue;
if (fascistfirewall &&
prefer_tunnel &&
if (prefer_tunnel &&
d->or_port &&
router_get_by_digest(d->digest) &&
fascist_firewall_allows_address_or(d->addr, d->or_port))
(!fascistfirewall ||
fascist_firewall_allows_address_or(d->addr, d->or_port)))
smartlist_add(is_overloaded ? overloaded_tunnel : tunnel,
&d->fake_status.status);
else if (!fascistfirewall || (fascistfirewall &&
fascist_firewall_allows_address_dir(d->addr,
d->dir_port)))
else if (!fascistfirewall ||
fascist_firewall_allows_address_dir(d->addr, d->dir_port))
smartlist_add(is_overloaded ? overloaded_direct : direct,
&d->fake_status.status);
});
@ -1379,6 +1375,21 @@ router_digest_is_trusted_dir(const char *digest)
return 0;
}
/** If hexdigest is correctly formed, base16_decode it into
* digest, which must have DIGEST_LEN space in it.
* Return 0 on success, -1 on failure.
*/
int
hexdigest_to_digest(const char *hexdigest, char *digest)
{
if (hexdigest[0]=='$')
++hexdigest;
if (strlen(hexdigest) < HEX_DIGEST_LEN ||
base16_decode(digest,DIGEST_LEN,hexdigest,HEX_DIGEST_LEN) < 0)
return -1;
return 0;
}
/** Return the router in our routerlist whose hexadecimal key digest
* is <b>hexdigest</b>. Return NULL if no such router is known. */
routerinfo_t *
@ -1394,8 +1405,7 @@ router_get_by_hexdigest(const char *hexdigest)
if (hexdigest[0]=='$')
++hexdigest;
len = strlen(hexdigest);
if (len < HEX_DIGEST_LEN ||
base16_decode(digest,DIGEST_LEN,hexdigest,HEX_DIGEST_LEN) < 0)
if (hexdigest_to_digest(hexdigest, digest) < 0)
return NULL;
ri = router_get_by_digest(digest);
@ -3189,6 +3199,9 @@ add_trusted_dir_server(const char *nickname, const char *address,
ent->fake_status.status.dir_port = ent->dir_port;
ent->fake_status.status.or_port = ent->or_port;
if (ent->or_port)
ent->fake_status.status.version_supports_begindir = 1;
smartlist_add(trusted_dir_servers, ent);
router_dir_info_changed();
}