mongoose/docs/c-api/http_server.h/mg_check_digest_auth.md

title	decl_name	symbol_kind	signature
mg_check_digest_auth()	mg_check_digest_auth	func	int mg_check_digest_auth(struct mg_str method, struct mg_str uri, struct mg_str username, struct mg_str cnonce, struct mg_str response, struct mg_str qop, struct mg_str nc, struct mg_str nonce, struct mg_str auth_domain, FILE *fp);

Authenticates given response params against an opened password file. Returns 1 if authenticated, 0 otherwise.

It's used by mg_http_check_digest_auth().