Function kbkdf 

pub fn kbkdf<'a, T: PseudoRandomFunction<'a>>(
    kdf_mode: &KDFMode<'_>,
    input_type: &InputType<'_>,
    key: &'a dyn PseudoRandomFunctionKey<KeyHandle = T::KeyHandle>,
    prf: &mut T,
    derived_key: &mut [u8],
) -> Result<(), T::Error>

Performs SP800-108 key-based key derivation function

Inputs

• kdf_mode - Which mode the the derivation function will run in
• input_type - The type of input used to derive the key
• key - The base key to use to derive the key
• prf - The Pseudo-random function used to derive the key
• derived_key - The output key

Panics

If invalid options are provided, this function will panic