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Fix a remaining bug in Robert's bug1859 fix.

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When intro->extend_info is created for an introduction point, it
only starts out with a nickname, not necessarily an identity digest.
Thus, doing router_get_by_digest isn't necessarily safe.
This commit is contained in:
Nick Mathewson 2010-10-21 11:08:15 -04:00
parent 0e8d1c2217
commit 5f3010667d
1 changed files with 4 additions and 1 deletions
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5
src/or/rendclient.c
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@ -755,7 +755,10 @@ rend_client_get_random_intro(const rend_data_t *rend_query)
intro = smartlist_get(entry->parsed->intro_nodes, i);
/* Do we need to look up the router or is the extend info complete? */
if (!intro->extend_info->onion_key) {
router = router_get_by_digest(intro->extend_info->identity_digest);
if (tor_digest_is_zero(intro->extend_info->identity_digest))
router = router_get_by_hexdigest(intro->extend_info->nickname);
else
router = router_get_by_digest(intro->extend_info->identity_digest);
if (!router) {
log_info(LD_REND, "Unknown router with nickname '%s'; trying another.",
intro->extend_info->nickname);