driver

type Keeper interface {

	// Decrypt decrypts the ciphertext and returns the plaintext or an error.
	// Decrypt *may* decrypt ciphertexts that were encrypted using a different
	// key than the one provided to Keeper; some providers encode the key used
	// in the ciphertext.
	Decrypt(ctx context.Context, ciphertext []byte) ([]byte, error)

	// Encrypt encrypts the plaintext using the key, and returns the ciphertext.
	Encrypt(ctx context.Context, plaintext []byte) ([]byte, error)

	// Close releases any resources used for the Keeper.
	Close() error

	// ErrorAs allows providers to expose provider-specific types for returned
	// errors.
	//
	// See https://gocloud.dev/concepts/as/ for background information.
	ErrorAs(err error, i interface{}) bool

	// ErrorCode should return a code that describes the error, which was returned
	// by one of the other methods in this interface.
	ErrorCode(error) gcerrors.ErrorCode
}