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prop224: Don't use nodes as HSDirs if they don't have an HSDir index.

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This commit is contained in:
George Kadianakis 2017-08-02 16:50:15 +03:00 • committed by Nick Mathewson
parent 74981d1f13
commit e42c55626a
2 changed files with 30 additions and 4 deletions
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28
src/or/hs_common.c
View file

@ -1121,6 +1121,30 @@ hs_get_hsdir_spread_store(void)
HS_DEFAULT_HSDIR_SPREAD_STORE, 1, 128);
}
/** <b>node</b> is an HSDir so make sure that we have assigned an hsdir index.
* Return 0 if everything is as expected, else return -1. */
static int
node_has_hsdir_index(const node_t *node)
{
tor_assert(node_supports_v3_hsdir(node));
/* A node can't have an HSDir index without a descriptor since we need desc
* to get its ed25519 key */
if (!node_has_descriptor(node)) {
return 0;
}
/* At this point, since the node has a desc, this node must also have an
* hsdir index. If not, something went wrong, so BUG out. */
if (BUG(node->hsdir_index == NULL) ||
BUG(tor_mem_is_zero((const char*)node->hsdir_index->current,
DIGEST256_LEN))) {
return 0;
}
return 1;
}
/* For a given blinded key and time period number, get the responsible HSDir
* and put their routerstatus_t object in the responsible_dirs list. If
* is_next_period is true, the next hsdir_index of the node_t is used. If
@ -1162,7 +1186,9 @@ hs_get_responsible_hsdirs(const ed25519_public_key_t *blinded_pk,
node_t *n = node_get_mutable_by_id(rs->identity_digest);
tor_assert(n);
if (node_supports_v3_hsdir(n) && rs->is_hs_dir) {
if (BUG(n->hsdir_index == NULL)) {
if (!node_has_hsdir_index(n)) {
log_info(LD_GENERAL, "Node %s was found without hsdir index.",
node_describe(n));
continue;
}
smartlist_add(sorted_nodes, n);

6
src/or/nodelist.c
View file

@ -189,9 +189,9 @@ node_set_hsdir_index(node_t *node, const networkstatus_t *ns)
node_identity_pk = node_get_ed25519_id(node);
if (node_identity_pk == NULL) {
log_warn(LD_BUG, "ed25519 identity public key not found when "
"trying to build the hsdir indexes for node %s",
node_describe(node));
log_debug(LD_GENERAL, "ed25519 identity public key not found when "
"trying to build the hsdir indexes for node %s",
node_describe(node));
goto done;
}