Function box_stream::crypto::decrypt_header

#[must_use]
pub unsafe fn decrypt_header(
    out: &mut PlainHeader, 
    cypher_header: &[u8; 34], 
    decryption_key: &[u8; 32], 
    nonce: &mut [u8; 24]
) -> bool

If this returns true, it decrypts a received header into out. Returns false if the cyper_header was invalid.