tls_connection_export_key() function

tls_connection_export_key - Derive keying material from a TLS connection @tls_ctx: TLS context data from tls_init() @conn: Connection context data from tls_connection_init() @label: Label (e.g., description of the key) for PRF @context: Optional extra upper-layer context (max len 2^16) @context_len: The length of the context value @out: Buffer for output data from TLS-PRF @out_len: Length of the output buffer Returns: 0 on success, -1 on failure Exports keying material using the mechanism described in RFC 5705. If context is %NULL, context is not provided; otherwise, context is provided (including the case of empty context with context_len == 0).