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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_supported_versions.h"
      17                 :            : 
      18                 :            : #include <stdint.h>
      19                 :            : #include <sys/param.h>
      20                 :            : 
      21                 :            : #include "tls/s2n_security_policies.h"
      22                 :            : #include "utils/s2n_safety.h"
      23                 :            : 
      24                 :            : S2N_RESULT s2n_connection_get_minimum_supported_version(struct s2n_connection *conn, uint8_t *min_version)
      25                 :      15183 : {
      26 [ -  + ][ #  # ]:      15183 :     RESULT_ENSURE_REF(min_version);
      27                 :            : 
      28                 :      15183 :     const struct s2n_security_policy *security_policy = NULL;
      29         [ -  + ]:      15183 :     RESULT_GUARD_POSIX(s2n_connection_get_security_policy(conn, &security_policy));
      30 [ -  + ][ #  # ]:      15183 :     RESULT_ENSURE_REF(security_policy);
      31                 :      15183 :     *min_version = security_policy->minimum_protocol_version;
      32                 :            : 
      33                 :            :     /* QUIC requires >= TLS1.3 */
      34         [ +  + ]:      15183 :     if (s2n_connection_is_quic_enabled(conn)) {
      35                 :         34 :         *min_version = MAX(*min_version, S2N_TLS13);
      36                 :         34 :     }
      37                 :            : 
      38                 :      15183 :     return S2N_RESULT_OK;
      39                 :      15183 : }