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Make code more clear about own_link_cert safety

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It's okay to call add_ed25519_cert with a NULL argument: so,
document that.  Also, add a tor_assert_nonfatal() to catch any case
where we have failed to set own_link_cert when conn_in_server_mode.
This commit is contained in:
Nick Mathewson 2017-06-05 09:35:55 -04:00
parent 34a6755b94
commit e5bdfd66cf
1 changed files with 4 additions and 2 deletions
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6
src/or/connection_or.c
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@ -2238,7 +2238,8 @@ add_certs_cell_cert_helper(certs_cell_t *certs_cell,
/** Add an encoded X509 cert (stored as <b>cert_len</b> bytes at
* <b>cert_encoded</b>) to the trunnel certs_cell_t object that we are
* building in <b>certs_cell</b>. Set its type field to <b>cert_type</b>. */
* building in <b>certs_cell</b>. Set its type field to <b>cert_type</b>.
* (If <b>cert</b> is NULL, take no action.) */
static void
add_x509_cert(certs_cell_t *certs_cell,
uint8_t cert_type,
@ -2256,7 +2257,7 @@ add_x509_cert(certs_cell_t *certs_cell,
/** Add an Ed25519 cert from <b>cert</b> to the trunnel certs_cell_t object
* that we are building in <b>certs_cell</b>. Set its type field to
* <b>cert_type</b>. */
* <b>cert_type</b>. (If <b>cert</b> is NULL, take no action.) */
static void
add_ed25519_cert(certs_cell_t *certs_cell,
uint8_t cert_type,
@ -2313,6 +2314,7 @@ connection_or_send_certs_cell(or_connection_t *conn)
CERTTYPE_ED_ID_SIGN,
get_master_signing_key_cert());
if (conn_in_server_mode) {
tor_assert_nonfatal(conn->handshake_state->own_link_cert);
add_ed25519_cert(certs_cell,
CERTTYPE_ED_SIGN_LINK,
conn->handshake_state->own_link_cert);