diff options
Diffstat (limited to 'net/socket/ssl_client_socket_nss.cc')
| -rw-r--r-- | net/socket/ssl_client_socket_nss.cc | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/net/socket/ssl_client_socket_nss.cc b/net/socket/ssl_client_socket_nss.cc index d60547f..32e70f8 100644 --- a/net/socket/ssl_client_socket_nss.cc +++ b/net/socket/ssl_client_socket_nss.cc @@ -2050,6 +2050,23 @@ int SSLClientSocketNSS::Core::DoHandshake() { PRErrorCode prerr = PR_GetError(); net_error = HandleNSSError(prerr, true); + // Some network devices that inspect application-layer packets seem to + // inject TCP reset packets to break the connections when they see + // TLS 1.1 in ClientHello or ServerHello. See http://crbug.com/130293. + // + // Only allow ERR_CONNECTION_RESET to trigger a TLS 1.1 -> TLS 1.0 + // fallback. We don't lose much in this fallback because the explicit + // IV for CBC mode in TLS 1.1 is approximated by record splitting in + // TLS 1.0. + // + // ERR_CONNECTION_RESET is a common network error, so we don't want it + // to trigger a version fallback in general, especially the TLS 1.0 -> + // SSL 3.0 fallback, which would drop TLS extensions. + if (prerr == PR_CONNECT_RESET_ERROR && + ssl_config_.version_max == SSL_PROTOCOL_VERSION_TLS1_1) { + net_error = ERR_SSL_PROTOCOL_ERROR; + } + // If not done, stay in this state if (net_error == ERR_IO_PENDING) { GotoState(STATE_HANDSHAKE); |