Support HMAC-SHA-256 Authentication for IS-IS in FRR

[dd123456]

Currently, FRRouting's IS-IS daemon (isisd) supports simple text, MD5, and HMAC-MD5 authentication on interfaces. However, there is no support for stronger hash-based authentication mechanisms, such as HMAC-SHA-256, which are desirable for enhanced security. Also, keychain feature is not supported in ISIS unlike OSPF. So how can I use a algorithm like HMAC-SHA-256 in ISIS authentication?
Kindly share your views, Thanks in advance.