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teach alice to recognize y.onion addresses

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svn:r1430
This commit is contained in:
Roger Dingledine 2004-04-01 19:39:11 +00:00
parent 7993382ba1
commit f05937355e
1 changed files with 29 additions and 2 deletions
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31
src/or/rendcommon.c
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@ -177,12 +177,27 @@ void rend_cache_clean(void)
} }
} }
/* return 1 if query is a valid service id, else return 0. */
int rend_valid_service_id(char *query) {
if(strlen(query) != REND_SERVICE_ID_LEN)
return 0;
/* XXXX also check for bad chars. */
return 1;
}
/* 'query' is a base-32'ed service id. If it's malformed, return -1.
* Else look it up.
* If it is found, point *desc to it, and write its length into
* *desc_len, and return 1.
* If it is not found, return 0.
*/
int rend_cache_lookup(char *query, const char **desc, int *desc_len) int rend_cache_lookup(char *query, const char **desc, int *desc_len)
{ {
rend_cache_entry_t *e; rend_cache_entry_t *e;
assert(rend_cache); assert(rend_cache);
if (strlen(query) != REND_SERVICE_ID_LEN) if (!rend_valid_service_id(query))
return -1; /* XXXX also check for bad chars. */ return -1;
e = (rend_cache_entry_t*) strmap_get_lc(rend_cache, query); e = (rend_cache_entry_t*) strmap_get_lc(rend_cache, query);
if (!e) if (!e)
return 0; return 0;
@ -191,6 +206,9 @@ int rend_cache_lookup(char *query, const char **desc, int *desc_len)
return 1; return 1;
} }
/* Calculate desc's service id, and store it.
* Return -1 if it's malformed or otherwise rejected, else return 0.
*/
int rend_cache_store(char *desc, int desc_len) int rend_cache_store(char *desc, int desc_len)
{ {
rend_cache_entry_t *e; rend_cache_entry_t *e;
@ -251,8 +269,17 @@ int rend_cache_store(char *desc, int desc_len)
* Else return -1 and change nothing. * Else return -1 and change nothing.
*/ */
int rend_parse_rendezvous_address(char *address) { int rend_parse_rendezvous_address(char *address) {
char *s;
s = strchr(address,'.');
if(!s) return -1; /* no dot */
if(strcmp(s+1,"onion")) return -1; /* not .onion */
*s = 0; /* null terminate it */
if(rend_valid_service_id(address))
return 0; /* success */
/* otherwise, return to previous state and return -1 */
*s = '.';
return -1; return -1;
} }