pub fn extract_key_material(profile_xml: &str) -> Option<&str>Expand description
Extract the <keyMaterial> hex text from a WLAN profile XML, if present.
A minimal, robust scan for the first <keyMaterial>...</keyMaterial> element
(the profile schema has exactly one). Returns None when the tag is absent
(e.g. an open network with no key). Whitespace around the value is trimmed.