crypto.go

package crypto

import (
	"fmt"
	"time"

	"github.com/multiverse-os/levelup/crypto/argon2"
)

//GenerateKey(seed string) Keypair
//GenerateRandomKey() Keypair
type OTPType int

const (
	Time OTPType = iota
	HMAC
)

type CryptographicKey interface {
	GenerateChildKey() Keypair
	// NOTE: Derive a SSH, Bitcoin or other key deterministically (incrementable)
	//       from any key type, for example: Use a PGP key to generate your SSH
	//       keys on all your remote machines.
	DeriveKeypair(algorithm Algorithm) Keypair

	OneTimePassword(otpType OTPType) []byte

	ExpiresAt(expiresAt time.Time) Keypair
	Name(name string) Keypair
	ContactURI(contact string) Keypair
	Password(symmetricEncryption string) Keypair

	Algorithm() string

	Encrypt(input []byte) ([]byte, error)
	Decrypt(input []byte) ([]byte, error)

	Sign(input []byte) ([]byte, error)
	VerifySignature(input []byte) (bool, error)

	SplitKey() []KeyPart
	AssembleKey(keyParts ...KeyPart) Keypair

	GenerateToken(expiresAt time.Time) Token
	GenerateCertificate(expiresAt time.Time) Certificate
}

func GenerateKey(algorithm AlgorithmType, seed []byte) (Keypair, error) {
	switch algorithm {
	case Argon2:
		keypair := Keypair{
			Algorithm: Algorithm{
				Type:   algorithm,
				Params: argon2.DefaultParams(),
			},
		}

		return keypair

	default:
		return Keypair{}, fmt.Errorf("invalid algorithm")
	}
}