generate user key for new cluster and add it to peers on bootstrap machine

internal/cli/user.go

@@ -0,0 +1,51 @@
+package cli
+
+import (
+	"fmt"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"net/netip"
+	"uncloud/internal/secret"
+)
+
+type User struct {
+	privateKey wgtypes.Key
+}
+
+func NewUser(privateKey secret.Secret) (*User, error) {
+	var (
+		wgKey wgtypes.Key
+		err   error
+	)
+	if privateKey == nil {
+		wgKey, err = wgtypes.GeneratePrivateKey()
+		if err != nil {
+			return nil, fmt.Errorf("generate key for user: %w", err)
+		}
+		privateKey = wgKey[:]
+	} else {
+		wgKey, err = wgtypes.NewKey(privateKey)
+		if err != nil {
+			return nil, fmt.Errorf("invalid key: %w", err)
+		}
+		privateKey = wgKey[:]
+	}
+	return &User{
+		privateKey: wgKey,
+	}, nil
+}
+
+func (u *User) PrivateKey() secret.Secret {
+	return u.privateKey[:]
+}
+
+func (u *User) PublicKey() secret.Secret {
+	pubKey := u.privateKey.PublicKey()
+	return pubKey[:]
+}
+
+func (u *User) Address() netip.Addr {
+	pubKey := u.PublicKey()
+	bytes := [16]byte{0xfd, 0xcc}
+	copy(bytes[2:], pubKey[:14])
+	return netip.AddrFrom16(bytes)
+}