delphi

type Certifier interface {
	crypto.PrivateKey
	crypto.Signer
	Verifier
}

type Cipherer interface {
	crypto.PrivateKey
	Encrypter
	crypto.Decrypter
}

type CryptOpts struct {
	Nonce []byte
	AAED  []byte
}

type Encrypter interface {
	Encrypt(msg []byte, recipient crypto.PublicKey, opts any) ([]byte, error)
}

type Message struct {
	To                 *ecdh.PublicKey
	From               *ecdh.PublicKey
	Metadata           *stablemap.StableMap[string, any] // additional authenticated data (AAD)
	EphemeralPublicKey []byte
	Nonce              []byte
	CipherText         []byte
	PlainText          []byte
	Signature          []byte
}

type Principal interface {
	Cipherer
	Certifier
	encoding.BinaryMarshaler
	encoding.BinaryUnmarshaler
}

type Verifier interface {
	Verify(pub crypto.PublicKey, msg []byte, sig []byte) bool
}