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fixup! prop224: Fix length check when purging hidserv requests.

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Improve doc based on david's comments.
This commit is contained in:
George Kadianakis 2017-08-28 19:55:26 +03:00
parent 93a0a4a422
commit e94f68e301
1 changed files with 6 additions and 5 deletions
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11
src/or/hs_common.c
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@ -1357,7 +1357,7 @@ hs_hsdir_requery_period(const or_options_t *options)
*
* where 'hsdir_identity' is the identity digest of the HSDir node, and
* 'hs_identity' is the descriptor ID of the HS in the v2 case, or the ed25519
* identity public key of the HS in the v3 case. */
* blinded public key of the HS in the v3 case. */
static strmap_t *last_hid_serv_requests_ = NULL;
/** Returns last_hid_serv_requests_, initializing it to a new strmap if
@ -1454,10 +1454,11 @@ hs_purge_hid_serv_from_last_hid_serv_requests(const char *req_key_str)
* semantic, see #23305. */
/* This strmap contains variable-sized elements so this is a basic length
* check on the strings we are about to compare. The "key" contains both
* the base32 HSDir identity digest and the requested key at the
* directory. The "req_key_str" can either be a base32 descriptor ID or a
* base64 blinded key which should be the second part of "key". */
* check on the strings we are about to compare. The key is variable sized
* since it's composed as follows:
* key = base32(hsdir_identity) + base32(req_key_str)
* where 'req_key_str' is the descriptor ID of the HS in the v2 case, or
* the ed25519 blinded public key of the HS in the v3 case. */
if (strlen(key) < REND_DESC_ID_V2_LEN_BASE32 + strlen(req_key_str)) {
iter = strmap_iter_next(last_hid_serv_requests, iter);
continue;