SSL_get_peer_tmp_key, SSL_get_server_tmp_key, SSL_get_tmp_key - get information about temporary keys used

       Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file except in compliance
       with the License.  You can obtain a copy in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.

3.5.0                                              2025-06-04                         SSL_GET_PEER_TMP_KEY(3SSL)

SSL_get_peer_tmp_key() returns the temporary key provided by the peer and used during key exchange. For
       example, if ECDHE is in use, then this represents the peer's public ECDHE key. On success a pointer to
       the key is stored in *key. It is the caller's responsibility to free this key after use using
       EVP_PKEY_free(3).

       SSL_get_server_tmp_key() is a backwards compatibility alias for SSL_get_peer_tmp_key().  Under that name
       it worked just on the client side of the connection, its behaviour on the server end is release-
       dependent.

       SSL_get_tmp_key() returns the equivalent information for the local end of the connection.

       SSL_get_peer_tmp_key, SSL_get_server_tmp_key, SSL_get_tmp_key - get information about temporary keys used
       during a handshake

       This function is implemented as a macro.

       All these functions return 1 on success and 0 otherwise.

ssl(7), EVP_PKEY_free(3)

        #include <openssl/ssl.h>

        long SSL_get_peer_tmp_key(SSL *ssl, EVP_PKEY **key);
        long SSL_get_server_tmp_key(SSL *ssl, EVP_PKEY **key);
        long SSL_get_tmp_key(SSL *ssl, EVP_PKEY **key);