nip44

Documentation

Overview

Package nip44 implements NIP-44: Encrypted Payloads (Versioned), the current ChaCha20+HMAC-SHA256 (encrypt-then-MAC) scheme (v2) for direct-message and other private event content, superseding the legacy AES-CBC scheme in nip04.

Index

• Constants
• Variables
• func Decrypt(payload string, conversationKey []byte) (string, error)
• func Encrypt(plaintext string, conversationKey []byte) (string, error)
• func GenerateConversationKey(privKey *btcec.PrivateKey, pubKey *btcec.PublicKey) ([]byte, error)

Constants

const (
	Version = 2
)

Variables

var (
	ErrInvalidVersion  = errors.New("unknown encryption version")
	ErrMessageTooShort = errors.New("message too short")
	ErrInvalidPadding  = errors.New("invalid padding")
	ErrInvalidMAC      = errors.New("invalid MAC")
)

Functions

func Decrypt

func Decrypt(payload string, conversationKey []byte) (string, error)

Decrypt decrypts NIP-44 v2 payload.

func Encrypt

func Encrypt(plaintext string, conversationKey []byte) (string, error)

Encrypt encrypts plaintext using NIP-44 v2.

func GenerateConversationKey

func GenerateConversationKey(privKey *btcec.PrivateKey, pubKey *btcec.PublicKey) ([]byte, error)

GenerateConversationKey computes the conversation key using HKDF-SHA256-Extract derived from the secp256k1 shared secret X coordinate.