package crypto

// PrivateKey represents a private key that can be used to
// generate a public key and sign data
type PrivateKey interface {
	// Sign signs digest using key k.
	Sign(digest []byte) ([]byte, error)

	// Return a public key paired with this private key
	PublicKey() PublicKey
}

// PublicKey is a public key that can be used to verify data
// signed with the corresponding private key
type PublicKey interface {
	// Verify that 'sig' is the signed hash of 'data'
	Verify(digest []byte, sig []byte) (bool, error)
}