def _backend_config():
if backend() != '<STR_LIT>':<EOL><INDENT>return {}<EOL><DEDENT>if _module_values['<STR_LIT>'] is not None:<EOL><INDENT>return _module_values['<STR_LIT>']<EOL><DEDENT>with _backend_lock:<EOL><INDENT>if _module_values['<STR_LIT>'] is not None:<EOL><INDENT>return _module_values['<STR_LIT>']<EOL><DEDENT>_module_values['<STR_LIT>'] = {}<EOL>return _module_values['<STR_LIT>']<EOL><DEDENT>
:return:
    A dict of config info for the backend. Only currently used by "openssl",
    it may contains zero or more of the following keys:
     - "libcrypto_path"
     - "libssl_path"