MBEDTLS_SSL_CONTEXT_SERIALIZATION macro

\def MBEDTLS_SSL_ASYNC_PRIVATE Enable asynchronous external private key operations in SSL. This allows you to configure an SSL connection to call an external cryptographic module to perform private key operations instead of performing the operation inside the library. Requires: MBEDTLS_X509_CRT_PARSE_C \def MBEDTLS_SSL_CONTEXT_SERIALIZATION Enable serialization of the TLS context structures, through use of the functions mbedtls_ssl_context_save() and mbedtls_ssl_context_load(). This pair of functions allows one side of a connection to serialize the context associated with the connection, then free or re-use that context while the serialized state is persisted elsewhere, and finally deserialize that state to a live context for resuming read/write operations on the connection. From a protocol perspective, the state of the connection is unaffected, in particular this is entirely transparent to the peer. Note: this is distinct from TLS session resumption, which is part of the protocol and fully visible by the peer. TLS session resumption enables establishing new connections associated to a saved session with shorter, lighter handshakes, while context serialization is a local optimization in handling a single, potentially long-lived connection. Enabling these APIs makes some SSL structures larger, as 64 extra bytes are saved after the handshake to allow for more efficient serialization, so if you don't need this feature you'll save RAM by disabling it. Requires: MBEDTLS_GCM_C or MBEDTLS_CCM_C or MBEDTLS_CHACHAPOLY_C Comment to disable the context serialization APIs.