DecryptBytes takes a byte slice of encrypted data and an encryption key and returns a decrypted byte slice of data.
The key must be an AES key, either 16, 24, or 32 bytes to select AES-128, AES-192, or AES-256
EncryptBytes takes a byte slice of raw data and an encryption key and returns an encrypted byte slice of data.
The key must be an AES key, either 16, 24, or 32 bytes to select AES-128, AES-192, or AES-256