service

type AEAD interface {
	// Encrypt encrypts plaintext with optional AAD and returns ciphertext and nonce.
	Encrypt(plaintext, aad []byte) (ciphertext, nonce []byte, err error)

	// Decrypt decrypts ciphertext using the provided nonce and AAD.
	Decrypt(ciphertext, nonce, aad []byte) ([]byte, error)

	// NonceSize returns the size of the nonce required by the cipher.
	NonceSize() int
}

type AEADManager interface {
	// CreateCipher creates an AEAD cipher instance for the specified algorithm.
	CreateCipher(key []byte, alg cryptoDomain.Algorithm) (AEAD, error)
}

type AEADManagerService struct{}