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       1                 :            : /*
       2                 :            :  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
       3                 :            :  *
       4                 :            :  * Licensed under the Apache License, Version 2.0 (the "License").
       5                 :            :  * You may not use this file except in compliance with the License.
       6                 :            :  * A copy of the License is located at
       7                 :            :  *
       8                 :            :  *  http://aws.amazon.com/apache2.0
       9                 :            :  *
      10                 :            :  * or in the "license" file accompanying this file. This file is distributed
      11                 :            :  * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
      12                 :            :  * express or implied. See the License for the specific language governing
      13                 :            :  * permissions and limitations under the License.
      14                 :            :  */
      15                 :            : 
      16                 :            : #include "utils/s2n_events.h"
      17                 :            : 
      18                 :            : #include "tls/s2n_connection.h"
      19                 :            : #include "tls/s2n_security_policies.h"
      20                 :            : 
      21                 :            : /**
      22                 :            :  * Populate handshake information at the end of the handshake.
      23                 :            :  * 
      24                 :            :  * Precondition: handshake timing information is already completed
      25                 :            :  */
      26                 :            : S2N_RESULT s2n_event_handshake_populate(struct s2n_connection *conn, struct s2n_event_handshake *event)
      27                 :      20218 : {
      28 [ -  + ][ #  # ]:      20218 :     RESULT_ENSURE_REF(event);
      29                 :            : 
      30                 :      20218 :     event->protocol_version = s2n_connection_get_actual_protocol_version(conn);
      31                 :      20218 :     event->cipher = s2n_connection_get_cipher(conn);
      32                 :            :     /* get_key_group is expected to fail in cases where a group is not negotiated,
      33                 :            :      * e.g. RSA key exchange. In this case event->group will be null. */
      34                 :      20218 :     s2n_connection_get_key_exchange_group(conn, &event->group);
      35                 :            : 
      36                 :      20218 :     const struct s2n_security_policy *security_policy = NULL;
      37         [ +  - ]:      20218 :     if (s2n_connection_get_security_policy(conn, &security_policy) == S2N_SUCCESS) {
      38                 :      20218 :         event->security_policy_label = s2n_find_version_from_security_policy(security_policy);
      39                 :      20218 :     }
      40                 :            : 
      41                 :      20218 :     return S2N_RESULT_OK;
      42                 :      20218 : }
      43                 :            : 
      44                 :            : /**
      45                 :            :  * Send the completed handshake event by calling the appropriate method
      46                 :            :  * on the subscriber.
      47                 :            :  * 
      48                 :            :  * If there is no subscriber on the config this method is a no-op
      49                 :            :  */
      50                 :            : S2N_RESULT s2n_event_handshake_send(struct s2n_connection *conn, struct s2n_event_handshake *event)
      51                 :      20219 : {
      52 [ #  # ][ -  + ]:      20219 :     RESULT_ENSURE_REF(conn);
      53 [ -  + ][ #  # ]:      20219 :     RESULT_ENSURE_REF(conn->config);
      54 [ -  + ][ #  # ]:      20219 :     RESULT_ENSURE_REF(event);
      55                 :            : 
      56 [ +  + ][ -  + ]:      20219 :     if (conn->config->subscriber == NULL || conn->config->on_handshake_event == NULL) {
      57                 :      20217 :         return S2N_RESULT_OK;
      58                 :      20217 :     }
      59                 :            : 
      60                 :            :     /* the event has already been sent */
      61         [ +  + ]:          2 :     if (event->handshake_start_ns == HANDSHAKE_EVENT_SENT) {
      62                 :          1 :         return S2N_RESULT_OK;
      63                 :          1 :     }
      64                 :            : 
      65                 :          1 :     conn->config->on_handshake_event(conn, conn->config->subscriber, event);
      66                 :          1 :     event->handshake_start_ns = HANDSHAKE_EVENT_SENT;
      67                 :          1 :     return S2N_RESULT_OK;
      68                 :          2 : }