diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/common/tortls.c | 10 | ||||
| -rw-r--r-- | src/common/tortls.h | 1 | ||||
| -rw-r--r-- | src/or/connection_or.c | 5 |
3 files changed, 16 insertions, 0 deletions
diff --git a/src/common/tortls.c b/src/common/tortls.c index ddb5ea1efc..9caf9308bf 100644 --- a/src/common/tortls.c +++ b/src/common/tortls.c @@ -1572,6 +1572,16 @@ tor_tls_unblock_renegotiation(tor_tls_t *tls) } } +/** If this version of openssl supports it, turn off renegotiation on + * <b>tls</b>. (Our protocol never requires this for security, but it's nice + * to use belt-and-suspenders here.) + */ +void +tor_tls_block_renegotiation(tor_tls_t *tls) +{ + tls->ssl->s3->flags &= ~SSL3_FLAGS_ALLOW_UNSAFE_LEGACY_RENEGOTIATION; +} + void tor_tls_assert_renegotiation_unblocked(tor_tls_t *tls) { diff --git a/src/common/tortls.h b/src/common/tortls.h index e558df756c..673f18dfe8 100644 --- a/src/common/tortls.h +++ b/src/common/tortls.h @@ -77,6 +77,7 @@ int tor_tls_handshake(tor_tls_t *tls); int tor_tls_finish_handshake(tor_tls_t *tls); int tor_tls_renegotiate(tor_tls_t *tls); void tor_tls_unblock_renegotiation(tor_tls_t *tls); +void tor_tls_block_renegotiation(tor_tls_t *tls); void tor_tls_assert_renegotiation_unblocked(tor_tls_t *tls); int tor_tls_shutdown(tor_tls_t *tls); int tor_tls_get_pending_bytes(tor_tls_t *tls); diff --git a/src/or/connection_or.c b/src/or/connection_or.c index 992db9a40c..cbe678d6cf 100644 --- a/src/or/connection_or.c +++ b/src/or/connection_or.c @@ -1149,6 +1149,10 @@ connection_or_tls_renegotiated_cb(tor_tls_t *tls, void *_conn) or_connection_t *conn = _conn; (void)tls; + /* Don't invoke this again. */ + tor_tls_set_renegotiate_callback(tls, NULL, NULL); + tor_tls_block_renegotiation(tls); + if (connection_tls_finish_handshake(conn) < 0) { /* XXXX_TLS double-check that it's ok to do this from inside read. */ /* XXXX_TLS double-check that this verifies certificates. */ @@ -1537,6 +1541,7 @@ connection_tls_finish_handshake(or_connection_t *conn) connection_or_init_conn_from_address(conn, &conn->_base.addr, conn->_base.port, digest_rcvd, 0); } + tor_tls_block_renegotiation(conn->tls); return connection_or_set_state_open(conn); } else { conn->_base.state = OR_CONN_STATE_OR_HANDSHAKING_V2; |