MINOR: quic-tls: Add quic_hkdf_extract_and_expand() for HKDF

This is a wrapper function around OpenSSL HKDF API functions to
use the "extract-then-expand" HKDF mode as defined by rfc5869.
This function will be used to derived stateless reset tokens
from secrets ("cluster-secret" conf. keyword) and CIDs (as salts).
2 files changed