status-go/vendor/github.com/libp2p/go-libp2p/config/quic_stateless_reset.go

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package config
import (
"crypto/sha256"
"io"
"golang.org/x/crypto/hkdf"
"github.com/libp2p/go-libp2p/core/crypto"
"github.com/quic-go/quic-go"
)
const statelessResetKeyInfo = "libp2p quic stateless reset key"
func PrivKeyToStatelessResetKey(key crypto.PrivKey) (quic.StatelessResetKey, error) {
var statelessResetKey quic.StatelessResetKey
keyBytes, err := key.Raw()
if err != nil {
return statelessResetKey, err
}
keyReader := hkdf.New(sha256.New, keyBytes, nil, []byte(statelessResetKeyInfo))
if _, err := io.ReadFull(keyReader, statelessResetKey[:]); err != nil {
return statelessResetKey, err
}
return statelessResetKey, nil
}