mongoose/docs/c-api/net.h/mg_set_ssl.md

title	decl_name	symbol_kind	signature
mg_set_ssl()	mg_set_ssl	func	const char *mg_set_ssl(struct mg_connection *nc, const char *cert, const char *ca_cert);

Note: This function is deprecated, please use SSL options in mg_connect_opt.

Enable SSL for a given connection. cert is a server certificate file name for a listening connection, or a client certificate file name for an outgoing connection. Certificate files must be in PEM format. Server certificate file must contain a certificate, concatenated with a private key, optionally concatenated with DH parameters. ca_cert is a CA certificate, or NULL if peer verification is not required. Return: NULL on success, or error message on error.