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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 "tls/extensions/s2n_server_sct_list.h"
      17                 :            : 
      18                 :            : #include "stuffer/s2n_stuffer.h"
      19                 :            : #include "tls/s2n_connection.h"
      20                 :            : #include "tls/s2n_tls.h"
      21                 :            : #include "utils/s2n_blob.h"
      22                 :            : #include "utils/s2n_safety.h"
      23                 :            : 
      24                 :            : static bool s2n_server_sct_list_should_send(struct s2n_connection *conn);
      25                 :            : static int s2n_server_sct_list_send(struct s2n_connection *conn, struct s2n_stuffer *out);
      26                 :            : static int s2n_server_sct_list_recv(struct s2n_connection *conn, struct s2n_stuffer *extension);
      27                 :            : 
      28                 :            : const s2n_extension_type s2n_server_sct_list_extension = {
      29                 :            :     .iana_value = TLS_EXTENSION_SCT_LIST,
      30                 :            :     .is_response = true,
      31                 :            :     .send = s2n_server_sct_list_send,
      32                 :            :     .recv = s2n_server_sct_list_recv,
      33                 :            :     .should_send = s2n_server_sct_list_should_send,
      34                 :            :     .if_missing = s2n_extension_noop_if_missing,
      35                 :            : };
      36                 :            : 
      37                 :            : static bool s2n_server_sct_list_should_send(struct s2n_connection *conn)
      38                 :         19 : {
      39 [ +  + ][ +  + ]:         19 :     return s2n_server_can_send_sct_list(conn);
         [ +  + ][ +  + ]
      40                 :         19 : }
      41                 :            : 
      42                 :            : int s2n_server_sct_list_send(struct s2n_connection *conn, struct s2n_stuffer *out)
      43                 :          5 : {
      44 [ -  + ][ #  # ]:          5 :     POSIX_ENSURE_REF(conn);
      45                 :          5 :     struct s2n_blob *sct_list = &conn->handshake_params.our_chain_and_key->sct_list;
      46                 :            : 
      47 [ -  + ][ #  # ]:          5 :     POSIX_ENSURE_REF(sct_list);
      48         [ -  + ]:          5 :     POSIX_GUARD(s2n_stuffer_write(out, sct_list));
      49                 :            : 
      50                 :          5 :     return S2N_SUCCESS;
      51                 :          5 : }
      52                 :            : 
      53                 :            : int s2n_server_sct_list_recv(struct s2n_connection *conn, struct s2n_stuffer *extension)
      54                 :          3 : {
      55 [ #  # ][ -  + ]:          3 :     POSIX_ENSURE_REF(conn);
      56                 :            : 
      57                 :          3 :     struct s2n_blob sct_list = { 0 };
      58                 :          3 :     size_t data_available = s2n_stuffer_data_available(extension);
      59         [ -  + ]:          3 :     POSIX_GUARD(s2n_blob_init(&sct_list,
      60                 :          3 :             s2n_stuffer_raw_read(extension, data_available),
      61                 :          3 :             data_available));
      62 [ -  + ][ #  # ]:          3 :     POSIX_ENSURE_REF(sct_list.data);
      63                 :            : 
      64         [ -  + ]:          3 :     POSIX_GUARD(s2n_dup(&sct_list, &conn->ct_response));
      65                 :            : 
      66                 :          3 :     return S2N_SUCCESS;
      67                 :          3 : }