Unverified Commit 9d5c6317 authored by teor's avatar teor
Browse files

hs: Silence a spurious warning in rend_client_send_introduction()

gcc 8 warns that extend_info_t.nickname might be truncated by strncpy().

But it doesn't know that nickname can either contain a hex id, or a
nicknames. hex ids are only used for general and HSDir circuits.

Fixes bug 27463; bugfix on
parent ff148638
o Minor bugfixes (onion services):
- Silence a spurious compiler warning in rend_client_send_introduction().
Fixes bug 27463; bugfix on
......@@ -269,6 +269,15 @@ rend_client_send_introduction(origin_circuit_t *introcirc,
dh_offset = v3_shift+7+DIGEST_LEN+2+klen+REND_COOKIE_LEN;
} else {
/* Version 0. */
/* Some compilers are smart enough to work out that nickname can be more
* than 19 characters, when it's a hexdigest. They warn that strncpy()
* will truncate hexdigests without NUL-terminating them. But we only put
* hexdigests in HSDir and general circuit exits. */
if (BUG(strlen(rendcirc->build_state->chosen_exit->nickname)
goto perm_err;
strncpy(tmp, rendcirc->build_state->chosen_exit->nickname,
(MAX_NICKNAME_LEN+1)); /* nul pads */
memcpy(tmp+MAX_NICKNAME_LEN+1, rendcirc->rend_data->rend_cookie,
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