alice can intercept y.onion requests, do a lookup on them via tor,

and receive a 404


svn:r1455
This commit is contained in:
Roger Dingledine 2004-04-03 01:59:53 +00:00
parent 15036380a8
commit 8c19d6e3d7
8 changed files with 53 additions and 36 deletions

View File

@ -258,6 +258,8 @@ circuit_t *circuit_get_by_conn(connection_t *conn) {
*
* circ_purpose specifies what sort of circuit we must have.
* If circ_purpose is not GENERAL, then conn must be defined.
* If circ_purpose is C_ESTABLISH_REND, then it's also ok
* to return a C_REND_JOINED circ.
*/
circuit_t *circuit_get_newest(connection_t *conn,
int must_be_open, uint8_t circ_purpose) {
@ -272,7 +274,12 @@ circuit_t *circuit_get_newest(connection_t *conn,
if (circ->marked_for_close)
continue;
if (circ->purpose != circ_purpose)
/* if this isn't our purpose, skip. except, if our purpose is
* establish_rend, keep going if circ is rend_joined.
*/
if (circ->purpose != circ_purpose &&
(circ_purpose != CIRCUIT_PURPOSE_C_ESTABLISH_REND ||
circ->purpose != CIRCUIT_PURPOSE_C_REND_JOINED))
continue;
#if 0

View File

@ -745,6 +745,7 @@ static int connection_ap_handshake_process_socks(connection_t *conn) {
int desc_len;
strcpy(conn->rend_query, socks->address);
log_fn(LOG_INFO,"Got a hidden service request for ID '%s'", conn->rend_query);
/* see if we already have it cached */
if (rend_cache_lookup(conn->rend_query, &descp, &desc_len) == 1) {
conn->purpose = AP_PURPOSE_RENDPOINT_WAIT;

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@ -90,6 +90,7 @@ void directory_initiate_command(routerinfo_t *router, int purpose,
conn->state = DIR_CONN_STATE_CLIENT_SENDING;
connection_set_poll_socket(conn);
connection_start_reading(conn);
}
}

View File

@ -189,7 +189,8 @@ static int new_route_len(double cw, routerinfo_t **rarray, int rarray_len) {
num_acceptable_routers = count_acceptable_routers(rarray, rarray_len);
if(num_acceptable_routers < 2) {
log_fn(LOG_INFO,"Not enough acceptable routers. Discarding this circuit.");
log_fn(LOG_INFO,"Not enough acceptable routers (%d). Discarding this circuit.",
num_acceptable_routers);
return -1;
}
@ -356,6 +357,7 @@ cpath_build_state_t *onion_new_cpath_build_state(uint8_t purpose,
} else { /* we have to decide one */
exit = choose_good_exit_server(purpose, rl);
if(!exit) {
log_fn(LOG_WARN,"failed to choose an exit server");
tor_free(info);
return NULL;
}

View File

@ -1039,6 +1039,9 @@ void rend_client_rendcirc_is_ready(connection_t *apconn, circuit_t *circ);
void rend_client_rendezvous(connection_t *apconn, circuit_t *circ);
void rend_client_desc_fetched(char *query, int success);
int rend_cmp_service_ids(char *one, char *two);
int rend_parse_rendezvous_address(char *address);
/********************************* rendcommon.c ***************************/
typedef struct rend_service_descriptor_t {
@ -1055,14 +1058,12 @@ int rend_encode_service_descriptor(rend_service_descriptor_t *desc,
int *len_out);
rend_service_descriptor_t *rend_parse_service_descriptor(const char *str, int len);
int rend_get_service_id(crypto_pk_env_t *pk, char *out);
int rend_cmp_service_ids(char *one, char *two);
void rend_cache_init(void);
void rend_cache_clean(void);
int rend_cache_lookup(char *query, const char **desc, int *desc_len);
int rend_cache_store(char *desc, int desc_len);
int rend_parse_rendezvous_address(char *address);
/********************************* rendservice.c ***************************/

View File

@ -54,6 +54,7 @@ void rend_client_desc_fetched(char *query, int success) {
continue;
/* great, this guy was waiting */
if(success) {
log_fn(LOG_INFO,"Rend desc retrieved. Launching rend circ.");
conn->purpose = AP_PURPOSE_RENDPOINT_WAIT;
if (connection_ap_handshake_attach_circuit(conn) < 0) {
/* it will never work */
@ -67,6 +68,37 @@ void rend_client_desc_fetched(char *query, int success) {
}
}
int rend_cmp_service_ids(char *one, char *two) {
return strcasecmp(one,two);
}
/* If address is of the form "y.onion" with a well-formed handle y,
* then put a '\0' after y, lower-case it, and return 0.
* Else return -1 and change nothing.
*/
int rend_parse_rendezvous_address(char *address) {
char *s;
char query[REND_SERVICE_ID_LEN+1];
s = strrchr(address,'.');
if(!s) return -1; /* no dot */
if (strcasecmp(s+1,"onion"))
return -1; /* not .onion */
*s = 0; /* null terminate it */
if(strlcpy(query, address, REND_SERVICE_ID_LEN+1) >= REND_SERVICE_ID_LEN+1)
goto failed;
tor_strlower(query);
if(rend_valid_service_id(query)) {
tor_strlower(address);
return 0; /* success */
}
failed:
/* otherwise, return to previous state and return -1 */
*s = '.';
return -1;
}
/*
Local Variables:
mode:c

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@ -121,10 +121,6 @@ int rend_get_service_id(crypto_pk_env_t *pk, char *out)
return 0;
}
int rend_cmp_service_ids(char *one, char *two) {
return strcasecmp(one,two);
}
/* ==== Rendezvous service descriptor cache. */
#define REND_CACHE_MAX_AGE 24*60*60
#define REND_CACHE_MAX_SKEW 60*60
@ -251,34 +247,6 @@ int rend_cache_store(char *desc, int desc_len)
return 0;
}
/* ==== General utility functions for rendezvous. */
/* If address is of the form "y.onion" with a well-formed handle y,
* then put a '\0' after y, lower-case it, and return 0.
* Else return -1 and change nothing.
*/
int rend_parse_rendezvous_address(char *address) {
char *s;
char query[REND_SERVICE_ID_LEN+1];
s = strchr(address,'.');
if(!s) return -1; /* no dot */
if(strcasecmp(s+1,"onion")) return -1; /* not .onion */
*s = 0; /* null terminate it */
if(strlcpy(query, address, REND_SERVICE_ID_LEN+1) >= REND_SERVICE_ID_LEN+1)
goto failed;
tor_strlower(query);
if(rend_valid_service_id(query)) {
tor_strlower(address);
return 0; /* success */
}
failed:
/* otherwise, return to previous state and return -1 */
*s = '.';
return -1;
}
/*
Local Variables:
mode:c

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@ -828,6 +828,8 @@ test_dir_format()
void test_rend_fns()
{
char address1[] = "fooaddress.onion";
char address2[] = "aaaaaaaaaaaaaaaa.onion";
rend_service_descriptor_t *d1, *d2;
char *encoded;
int len;
@ -856,6 +858,9 @@ void test_rend_fns()
test_streq(d2->intro_points[1], "crow");
test_streq(d2->intro_points[2], "joel");
test_eq(-1, rend_parse_rendezvous_address(address1));
test_eq( 0, rend_parse_rendezvous_address(address2));
rend_service_descriptor_free(d1);
rend_service_descriptor_free(d2);
}