INNER CODE UNIT · Go

chacha20polyEncrypt

lightningnetwork/lightning-onion · crypto.go:210

func chacha20polyEncrypt(key, plainTxt []byte) ([]byte, error) {
	aead, err := chacha20poly1305.New(key)
	if err != nil {
		return nil, err
	}

	return aead.Seal(plainTxt[:0], chaChaPolyZeroNonce[:], plainTxt, nil),
		nil
}

// chacha20polyDecrypt initialises the ChaCha20Poly1305 algorithm with the given
// key and uses it to decrypt the passed cipher text. This uses an all-zero
// nonce as required by the route-blinding spec.
func chacha20polyDecrypt(key, cipherTxt []byte) ([]byte, error) {
	aead, err := chacha20poly1305.New(key)
	if err != nil {
		return nil, err
	}

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