SSL_group_to_name - get name of group

       Copyright 2021-2024 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_GROUP_TO_NAME(3SSL)

SSL_group_to_name() is used to retrieve the TLS group name associated with a given TLS group ID, as
       registered via built-in or external providers and as returned by a call to SSL_get1_groups() or
       SSL_get_shared_group().

       SSL_group_to_name - get name of group

       If non-NULL, SSL_group_to_name() returns the TLS group name corresponding to the given id as a NUL-
       terminated string.  If SSL_group_to_name() returns NULL, an error occurred; possibly no corresponding
       tlsname was registered during provider initialisation.

       Note that the return value is valid only during the lifetime of the SSL object ssl.

ssl(7)

        #include <openssl/ssl.h>

        const char *SSL_group_to_name(SSL *ssl, int id);