WolfSSL esp_tls TLS1.3 configuration issue (IDFGH-6683)

[klassen9]

This can cause problems when trying to run WolfSSL in TLS1.3 only mode.

esp-idf/components/esp-tls/esp_tls_wolfssl.c

Line 171 in 84d11d1

tls->priv_ctx = (void *)wolfSSL_CTX_new(wolfTLSv1_2_client_method());

esp-idf/components/esp-tls/esp_tls_wolfssl.c

Line 313 in 84d11d1

tls->priv_ctx = (void *)wolfSSL_CTX_new(wolfTLSv1_2_server_method());

[AdityaHPatwardhan]

Hi @klassen9 Thanks for the issue.
I think using the wolfSSL23_client_method(); would be appropriate here, as the API is able to downgrade to appropriate version which has been selected by menuconfig.
I will make the change in the IDF.

[klassen9]

Isnt the wolfSSL23_client_method() funktion used for SSLv2 and SSLv3? I think that funktion is outdated because SSLv2 and SSLv3 are deprecated.

My proposed change is to add a compiler switch, checking if WOLFSSL_TLS13 is defined. If not, the wolfTLSv1_2_xy_method() is called.