ot::Mac::KeyMaterial::ConvertToCryptoKey() const method

A reference to a `Crypto::Key` to populate.

Sets the key.

Sets the key and starts the HMAC computation.

Initializes the `LiteralKey` from a given `Key`. If the @p aKey is itself represents a literal key the same key buffer pointers are used. If the @p aKey is a `KeyRef` then the literal key is extracted. In this case, the extracted key MUST be smaller than `kMaxSize`.

Sets the key.

Performs the HKDF Extract step. In the Extract step getting an input key extracts from it a pseudo-random key.