func: char *CONF_get1_default_config_file() char * file ; file = getenv ( "OPENSSL_CONF" ); if ( file )  return BUF_strdup ( file ) ; if ( ! file )  BUF_strlcpy ( file , X509_get_default_cert_area ( ) , ( len + 1 ) ); BUF_strlcat ( file , "/" , ( len + 1 ) ); BUF_strlcat ( file , "openssl.cnf" , ( len + 1 ) ); return file ; 