wireguard: WIP

Signed-off-by: Alejandro Mery <amery@jpi.io>

go.mod

@@ -10,7 +10,6 @@ require (
 	github.com/burntSushi/toml v0.3.1
 	github.com/mgechev/revive v1.3.2
 	github.com/spf13/cobra v1.7.0
-	golang.org/x/crypto v0.12.0
 	gopkg.in/gcfg.v1 v1.2.3
 )
 

go.sum

@@ -70,8 +70,6 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-golang.org/x/crypto v0.12.0 h1:tFM/ta59kqch6LlvYnPa0yx5a83cL2nHflFhYKvv9Yk=
-golang.org/x/crypto v0.12.0/go.mod h1:NF0Gs7EO5K4qLn+Ylc+fih8BSTeIjAP05siRnAh98yw=
 golang.org/x/exp v0.0.0-20230713183714-613f0c0eb8a1 h1:MGwJjxBy0HJshjDNfLsYO8xppfqWlA5ZT9OhtUUhTNw=
 golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
 golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=

pkg/wireguard/keys.go

@@ -2,11 +2,8 @@ package wireguard
 
 import (
 	"bytes"
-	"crypto/rand"
 	"encoding/base64"
 	"errors"
-
-	"golang.org/x/crypto/curve25519"
 )
 
 const (
@@ -19,10 +16,6 @@ const (
 var (
 	// ErrInvalidKeySize indicates the key size is wrong
 	ErrInvalidKeySize = errors.New("invalid key size")
-	// ErrInvalidPrivateKey indicates the private key is invalid
-	ErrInvalidPrivateKey = errors.New("invalid private key")
-	// ErrInvalidPublicKey indicates the public key is invalid
-	ErrInvalidPublicKey = errors.New("invalid public key")
 )
 
 type (
@@ -96,34 +89,9 @@ func decodeKey(data string, size int) ([]byte, error) {
 	}
 }
 
-// NewPrivateKey creates a new PrivateKey
+func NewPrivateKey() (PrivateKey, error)
-func NewPrivateKey() (PrivateKey, error) {
-	var s [PrivateKeySize]byte
 
-	_, err := rand.Read(s[:])
+func (PrivateKey) Public() PublicKey
-	if err != nil {
-		return []byte{}, err
-	}
-
-	// apply same clamping as wireguard-go/device/noise-helpers.go
-	s[0] &= 0xf8
-	s[31] = (s[31] & 0x7f) | 0x40
-
-	return s[:], nil
-}
-
-// Public generates the corresponding PublicKey
-func (key PrivateKey) Public() PublicKey {
-	if len(key) != PrivateKeySize {
-		return []byte{}
-	}
-
-	out := [PublicKeySize]byte{}
-	in := (*[PrivateKeySize]byte)(key)
-
-	curve25519.ScalarBaseMult(&out, in)
-	return out[:]
-}
 
 // KeyPair holds a Key pair
 type KeyPair struct {
@@ -131,33 +99,6 @@ type KeyPair struct {
 	PublicKey  PublicKey
 }
 
-// Validate checks the PublicKey matches the PrivateKey,
-// and sets the PublicKey if missing
-func (kp *KeyPair) Validate() error {
-	keyLen := len(kp.PrivateKey)
-	pubLen := len(kp.PublicKey)
-
-	switch {
-	case keyLen != PrivateKeySize:
-		// bad private key
-		return ErrInvalidPrivateKey
-	case pubLen == 0:
-		// no public key, set it
-		kp.PublicKey = kp.PrivateKey.Public()
-		return nil
-	case pubLen != PublicKeySize:
-		// bad public key
-		return ErrInvalidPublicKey
-	case !kp.PrivateKey.Public().Equal(kp.PublicKey):
-		// wrong public key
-		return ErrInvalidPublicKey
-	default:
-		// correct public key
-		return nil
-	}
-}
-
-// NewKeyPair creates a new KeyPair for Wireguard
 func NewKeyPair() (*KeyPair, error) {
 	key, err := NewPrivateKey()
 	if err != nil {

pkg/zones/env.go

@@ -88,7 +88,7 @@ func getRingZeroGatewayID(z *Zone) int {
 			firstNodeID = nodeID
 		}
 
-		if _, found := p.getRingInfo(0); found {
+		if p.Gateway() {
 			gatewayID = nodeID
 		}
 

pkg/zones/machine.go

@@ -47,6 +47,34 @@ func (m *Machine) ID() int {
 	return m.id
 }
 
+// Gateway tells if the Machine is a ring0 gateway
+func (m *Machine) Gateway() bool {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if ri, found := m.getRingInfo(0); found {
+		return ri.Enabled
+	}
+
+	return false
+}
+
+func (m *Machine) SetGateway(enable bool) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	ri, found := m.getRingInfo(0)
+	switch {
+	case !found && !enable:
+		return nil
+	case !found:
+		return m.createRingInfo(0, true)
+	default:
+		ri.Enabled = enable
+		return nil
+	}
+}
+
 // FullName returns the Name of the machine including domain name
 func (m *Machine) FullName() string {
 	if domain := m.zone.zones.domain; domain != "" {

pkg/zones/machine_rings.go

@@ -134,3 +134,18 @@ func (m *Machine) applyZoneNodeID(zoneID, nodeID int) error {
 
 	return nil
 }
+
+func (m *Machine) createRingInfo(ring int, enabled bool) error {
+	keys, err := wireguard.NewKeyPair()
+	if err != nil {
+		return err
+	}
+
+	ri := &RingInfo{
+		Ring:    ring,
+		Enabled: enabled,
+		Keys:    keys,
+	}
+
+	return m.applyRingInfo(ring, ri)
+}