Function streamKey

primitives.go:65–72

(fileKey, nonce []byte)

}

func streamKey(fileKey, nonce []byte) []byte {
	h := hkdf.New(sha256.New, fileKey, nonce, []byte("payload"))
	streamKey := make([]byte, chacha20poly1305.KeySize)
	if _, err := io.ReadFull(h, streamKey); err != nil {
		panic("age: internal error: failed to read from HKDF: " + err.Error())
	}
	return streamKey
}