package models

import "errors"

// TODO: Look at using shamir's secret sharing to distribute components of the secret key
var secretKey []byte
var secretReceived bool

func ReceiveKey(key string) error {

	// confirm that the key is 32 bytes long exactly
	if len(key) != 32 {
		return errors.New("secret key provided is not exactly 32 bytes long")
	}

	// Store the secret key so that we can access it when encrypting/decrypting
	secretKey = []byte(key)
	secretReceived = true
	return nil
}

func ProvideKey() ([]byte, error) {

	// Provide the key when needed to decrypt/encrypt stored secrets
	if secretReceived {
		return secretKey, nil
	} else {
		return nil, errors.New("secret key has not been received")
	}
}

func CheckKeyProvided() bool {
	return secretReceived
}