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network: clear wireguard keys on failure or on exit

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This commit is contained in:
Yu Watanabe 2019-04-08 02:48:02 +09:00
parent cb31e7c861
commit 6ef5c881dd
1 changed files with 12 additions and 6 deletions
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18
src/network/netdev/wireguard.c
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@ -53,6 +53,7 @@ static void wireguard_peer_free(WireguardPeer *peer) {
free(peer->endpoint_host);
free(peer->endpoint_port);
explicit_bzero_safe(peer->preshared_key, WG_KEY_LEN);
free(peer);
}
@ -492,21 +493,25 @@ static int wireguard_decode_key_and_warn(
return 0;
}
r = unbase64mem(rvalue, strlen(rvalue), &key, &len);
r = unbase64mem_full(rvalue, strlen(rvalue), true, &key, &len);
if (r < 0) {
log_syntax(unit, LOG_ERR, filename, line, r,
"Failed to decode wireguard key provided by %s=, ignoring assignment: %m", lvalue);
return 0;
goto finalize;
}
if (len != WG_KEY_LEN) {
log_syntax(unit, LOG_ERR, filename, line, 0,
"Wireguard key provided by %s= has invalid length (%zu bytes), ignoring assignment.",
lvalue, len);
return 0;
goto finalize;
}
memcpy(ret, key, WG_KEY_LEN);
return true;
r = 0;
finalize:
explicit_bzero_safe(key, len);
return r;
}
int config_parse_wireguard_private_key(
@ -527,8 +532,8 @@ int config_parse_wireguard_private_key(
w = WIREGUARD(data);
assert(w);
return wireguard_decode_key_and_warn(rvalue, w->private_key, unit, filename, line, lvalue);
(void) wireguard_decode_key_and_warn(rvalue, w->private_key, unit, filename, line, lvalue);
return 0;
}
int config_parse_wireguard_private_key_file(
@ -839,6 +844,7 @@ static void wireguard_done(NetDev *netdev) {
sd_event_source_unref(w->resolve_retry_event_source);
explicit_bzero_safe(w->private_key, WG_KEY_LEN);
free(w->private_key_file);
hashmap_free_with_destructor(w->peers_by_section, wireguard_peer_free);