crypt

type Crypter struct {
	HashFunc func() hash.Hash
	HashSize int
	Key      Key
	BufSize  int
}

type Key interface {
	// Derive returns the AES key and HMAC-SHA key, for the given password,
	// salt combination.
	Derive(salt []byte) (aesKey, hmacKey []byte)

	// Size returns the key-size. Key-size should either 16, 24, or 32 to
	// select AES-128, AES-192, or AES-256.
	Size() int

	// Reset resets/flushes the key.
	Reset()
}