mirror of
https://github.com/KusakabeShi/EtherGuard-VPN.git
synced 2024-11-26 01:03:08 +01:00
More refactoring
This commit is contained in:
Jason A. Donenfeld
parent
729773fdf3
commit
b56af1829d
20
conn.go
20
conn.go
@ -74,9 +74,6 @@ func (device *Device) BindSetMark(mark uint32) error {
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device.net.mutex.Lock()
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defer device.net.mutex.Unlock()
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device.peers.mutex.Lock()
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defer device.peers.mutex.Unlock()
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// check if modified
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if device.net.fwmark == mark {
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@ -92,6 +89,18 @@ func (device *Device) BindSetMark(mark uint32) error {
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}
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}
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// clear cached source addresses
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device.peers.mutex.RLock()
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for _, peer := range device.peers.keyMap {
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peer.mutex.Lock()
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defer peer.mutex.Unlock()
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if peer.endpoint != nil {
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peer.endpoint.ClearSrc()
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}
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}
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device.peers.mutex.RUnlock()
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return nil
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}
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@ -100,9 +109,6 @@ func (device *Device) BindUpdate() error {
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device.net.mutex.Lock()
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defer device.net.mutex.Unlock()
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device.peers.mutex.Lock()
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defer device.peers.mutex.Unlock()
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// close existing sockets
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if err := unsafeCloseBind(device); err != nil {
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@ -135,6 +141,7 @@ func (device *Device) BindUpdate() error {
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// clear cached source addresses
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device.peers.mutex.RLock()
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for _, peer := range device.peers.keyMap {
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peer.mutex.Lock()
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defer peer.mutex.Unlock()
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@ -142,6 +149,7 @@ func (device *Device) BindUpdate() error {
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peer.endpoint.ClearSrc()
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}
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}
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device.peers.mutex.RUnlock()
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// start receiving routines
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59
device.go
59
device.go
@ -38,17 +38,12 @@ type Device struct {
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fwmark uint32 // mark value (0 = disabled)
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}
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noise struct {
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staticIdentity struct {
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mutex sync.RWMutex
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privateKey NoisePrivateKey
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publicKey NoisePublicKey
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}
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routing struct {
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mutex sync.RWMutex
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table AllowedIPs
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}
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peers struct {
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mutex sync.RWMutex
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keyMap map[NoisePublicKey]*Peer
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@ -56,8 +51,9 @@ type Device struct {
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// unprotected / "self-synchronising resources"
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indexTable IndexTable
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mac CookieChecker
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allowedips AllowedIPs
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indexTable IndexTable
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cookieChecker CookieChecker
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rate struct {
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underLoadUntil atomic.Value
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@ -87,15 +83,13 @@ type Device struct {
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/* Converts the peer into a "zombie", which remains in the peer map,
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* but processes no packets and does not exists in the routing table.
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*
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* Must hold:
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* device.peers.mutex : exclusive lock
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* device.routing : exclusive lock
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* Must hold device.peers.mutex.
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*/
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func unsafeRemovePeer(device *Device, peer *Peer, key NoisePublicKey) {
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// stop routing and processing of packets
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device.routing.table.RemoveByPeer(peer)
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device.allowedips.RemoveByPeer(peer)
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peer.Stop()
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// remove from peer map
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@ -131,19 +125,19 @@ func deviceUpdateState(device *Device) {
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device.isUp.Set(false)
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break
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}
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device.peers.mutex.Lock()
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device.peers.mutex.RLock()
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for _, peer := range device.peers.keyMap {
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peer.Start()
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}
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device.peers.mutex.Unlock()
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device.peers.mutex.RUnlock()
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case false:
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device.BindClose()
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device.peers.mutex.Lock()
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device.peers.mutex.RLock()
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for _, peer := range device.peers.keyMap {
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peer.Stop()
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}
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device.peers.mutex.Unlock()
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device.peers.mutex.RUnlock()
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}
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// update state variables
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@ -199,11 +193,8 @@ func (device *Device) SetPrivateKey(sk NoisePrivateKey) error {
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// lock required resources
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device.noise.mutex.Lock()
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defer device.noise.mutex.Unlock()
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device.routing.mutex.Lock()
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defer device.routing.mutex.Unlock()
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device.staticIdentity.mutex.Lock()
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defer device.staticIdentity.mutex.Unlock()
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device.peers.mutex.Lock()
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defer device.peers.mutex.Unlock()
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@ -224,13 +215,13 @@ func (device *Device) SetPrivateKey(sk NoisePrivateKey) error {
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// update key material
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device.noise.privateKey = sk
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device.noise.publicKey = publicKey
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device.mac.Init(publicKey)
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device.staticIdentity.privateKey = sk
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device.staticIdentity.publicKey = publicKey
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device.cookieChecker.Init(publicKey)
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// do static-static DH pre-computations
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rmKey := device.noise.privateKey.IsZero()
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rmKey := device.staticIdentity.privateKey.IsZero()
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for key, peer := range device.peers.keyMap {
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@ -239,7 +230,7 @@ func (device *Device) SetPrivateKey(sk NoisePrivateKey) error {
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if rmKey {
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hs.precomputedStaticStatic = [NoisePublicKeySize]byte{}
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} else {
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hs.precomputedStaticStatic = device.noise.privateKey.sharedSecret(hs.remoteStatic)
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hs.precomputedStaticStatic = device.staticIdentity.privateKey.sharedSecret(hs.remoteStatic)
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}
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if isZero(hs.precomputedStaticStatic[:]) {
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@ -281,10 +272,10 @@ func NewDevice(tun TUNDevice, logger *Logger) *Device {
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device.rate.limiter.Init()
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device.rate.underLoadUntil.Store(time.Time{})
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// initialize noise & crypt-key routine
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// initialize staticIdentity & crypt-key routine
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device.indexTable.Init()
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device.routing.table.Reset()
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device.allowedips.Reset()
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// setup buffer pool
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@ -333,12 +324,6 @@ func (device *Device) LookupPeer(pk NoisePublicKey) *Peer {
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}
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func (device *Device) RemovePeer(key NoisePublicKey) {
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device.noise.mutex.Lock()
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defer device.noise.mutex.Unlock()
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device.routing.mutex.Lock()
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defer device.routing.mutex.Unlock()
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device.peers.mutex.Lock()
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defer device.peers.mutex.Unlock()
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@ -351,12 +336,6 @@ func (device *Device) RemovePeer(key NoisePublicKey) {
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}
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func (device *Device) RemoveAllPeers() {
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device.noise.mutex.Lock()
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defer device.noise.mutex.Unlock()
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device.routing.mutex.Lock()
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defer device.routing.mutex.Unlock()
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device.peers.mutex.Lock()
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defer device.peers.mutex.Unlock()
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@ -107,6 +107,7 @@ type Handshake struct {
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precomputedStaticStatic [NoisePublicKeySize]byte // precomputed shared secret
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lastTimestamp tai64n.Timestamp
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lastInitiationConsumption time.Time
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lastSentHandshake time.Time
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}
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var (
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@ -153,8 +154,8 @@ func init() {
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func (device *Device) CreateMessageInitiation(peer *Peer) (*MessageInitiation, error) {
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device.noise.mutex.RLock()
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defer device.noise.mutex.RUnlock()
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device.staticIdentity.mutex.RLock()
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defer device.staticIdentity.mutex.RUnlock()
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handshake := &peer.handshake
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handshake.mutex.Lock()
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@ -206,7 +207,7 @@ func (device *Device) CreateMessageInitiation(peer *Peer) (*MessageInitiation, e
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ss[:],
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)
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aead, _ := chacha20poly1305.New(key[:])
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aead.Seal(msg.Static[:0], ZeroNonce[:], device.noise.publicKey[:], handshake.hash[:])
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aead.Seal(msg.Static[:0], ZeroNonce[:], device.staticIdentity.publicKey[:], handshake.hash[:])
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}()
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handshake.mixHash(msg.Static[:])
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@ -240,10 +241,10 @@ func (device *Device) ConsumeMessageInitiation(msg *MessageInitiation) *Peer {
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return nil
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}
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device.noise.mutex.RLock()
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defer device.noise.mutex.RUnlock()
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device.staticIdentity.mutex.RLock()
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defer device.staticIdentity.mutex.RUnlock()
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mixHash(&hash, &InitialHash, device.noise.publicKey[:])
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mixHash(&hash, &InitialHash, device.staticIdentity.publicKey[:])
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mixHash(&hash, &hash, msg.Ephemeral[:])
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mixKey(&chainKey, &InitialChainKey, msg.Ephemeral[:])
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@ -253,7 +254,7 @@ func (device *Device) ConsumeMessageInitiation(msg *MessageInitiation) *Peer {
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var peerPK NoisePublicKey
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func() {
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var key [chacha20poly1305.KeySize]byte
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ss := device.noise.privateKey.sharedSecret(msg.Ephemeral)
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ss := device.staticIdentity.privateKey.sharedSecret(msg.Ephemeral)
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KDF2(&chainKey, &key, chainKey[:], ss[:])
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aead, _ := chacha20poly1305.New(key[:])
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_, err = aead.Open(peerPK[:0], ZeroNonce[:], msg.Static[:], hash[:])
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@ -422,8 +423,8 @@ func (device *Device) ConsumeMessageResponse(msg *MessageResponse) *Peer {
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// lock private key for reading
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device.noise.mutex.RLock()
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defer device.noise.mutex.RUnlock()
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device.staticIdentity.mutex.RLock()
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defer device.staticIdentity.mutex.RUnlock()
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// finish 3-way DH
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@ -437,7 +438,7 @@ func (device *Device) ConsumeMessageResponse(msg *MessageResponse) *Peer {
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}()
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func() {
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ss := device.noise.privateKey.sharedSecret(msg.Ephemeral)
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ss := device.staticIdentity.privateKey.sharedSecret(msg.Ephemeral)
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mixKey(&chainKey, &chainKey, ss[:])
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setZero(ss[:])
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}()
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@ -490,7 +491,7 @@ func (device *Device) ConsumeMessageResponse(msg *MessageResponse) *Peer {
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/* Derives a new keypair from the current handshake state
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*
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*/
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func (peer *Peer) DeriveNewKeypair() error {
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func (peer *Peer) BeginSymmetricSession() error {
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device := peer.device
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handshake := &peer.handshake
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handshake.mutex.Lock()
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@ -552,50 +553,48 @@ func (peer *Peer) DeriveNewKeypair() error {
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// rotate key pairs
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kp := &peer.keypairs
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kp.mutex.Lock()
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keypairs := &peer.keypairs
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keypairs.mutex.Lock()
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defer keypairs.mutex.Unlock()
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peer.timersSessionDerived()
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previous := kp.previous
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next := kp.next
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current := kp.current
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previous := keypairs.previous
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next := keypairs.next
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current := keypairs.current
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if isInitiator {
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if next != nil {
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kp.next = nil
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kp.previous = next
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keypairs.next = nil
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keypairs.previous = next
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device.DeleteKeypair(current)
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} else {
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kp.previous = current
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keypairs.previous = current
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}
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device.DeleteKeypair(previous)
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kp.current = keypair
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keypairs.current = keypair
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} else {
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kp.next = keypair
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keypairs.next = keypair
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device.DeleteKeypair(next)
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kp.previous = nil
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keypairs.previous = nil
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device.DeleteKeypair(previous)
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}
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kp.mutex.Unlock()
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return nil
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}
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func (peer *Peer) ReceivedWithKeypair(receivedKeypair *Keypair) bool {
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kp := &peer.keypairs
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if kp.next != receivedKeypair {
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keypairs := &peer.keypairs
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if keypairs.next != receivedKeypair {
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return false
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}
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kp.mutex.Lock()
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defer kp.mutex.Unlock()
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if kp.next != receivedKeypair {
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keypairs.mutex.Lock()
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defer keypairs.mutex.Unlock()
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if keypairs.next != receivedKeypair {
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return false
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}
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old := kp.previous
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kp.previous = kp.current
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old := keypairs.previous
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keypairs.previous = keypairs.current
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peer.device.DeleteKeypair(old)
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kp.current = kp.next
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kp.next = nil
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keypairs.current = keypairs.next
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keypairs.next = nil
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return true
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}
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@ -36,8 +36,8 @@ func TestNoiseHandshake(t *testing.T) {
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defer dev1.Close()
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defer dev2.Close()
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peer1, _ := dev2.NewPeer(dev1.noise.privateKey.publicKey())
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peer2, _ := dev1.NewPeer(dev2.noise.privateKey.publicKey())
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peer1, _ := dev2.NewPeer(dev1.staticIdentity.privateKey.publicKey())
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peer2, _ := dev1.NewPeer(dev2.staticIdentity.privateKey.publicKey())
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assertEqual(
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t,
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@ -102,8 +102,8 @@ func TestNoiseHandshake(t *testing.T) {
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t.Log("deriving keys")
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key1 := peer1.DeriveNewKeypair()
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key2 := peer2.DeriveNewKeypair()
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key1 := peer1.BeginSymmetricSession()
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key2 := peer2.BeginSymmetricSession()
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if key1 == nil {
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t.Fatal("failed to dervice keypair for peer 1")
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70
peer.go
70
peer.go
@ -19,7 +19,7 @@ const (
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type Peer struct {
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isRunning AtomicBool
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mutex sync.RWMutex
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mutex sync.RWMutex // Mostly protects endpoint, but is generally taken whenever we modify peer
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keypairs Keypairs
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handshake Handshake
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device *Device
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@ -42,7 +42,6 @@ type Peer struct {
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handshakeAttempts uint
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needAnotherKeepalive bool
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sentLastMinuteHandshake bool
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lastSentHandshake time.Time
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}
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signals struct {
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@ -64,7 +63,7 @@ type Peer struct {
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stop chan struct{} // size 0, stop all go routines in peer
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}
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mac CookieGenerator
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cookieGenerator CookieGenerator
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}
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func (device *Device) NewPeer(pk NoisePublicKey) (*Peer, error) {
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@ -75,11 +74,8 @@ func (device *Device) NewPeer(pk NoisePublicKey) (*Peer, error) {
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// lock resources
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device.state.mutex.Lock()
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defer device.state.mutex.Unlock()
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device.noise.mutex.RLock()
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defer device.noise.mutex.RUnlock()
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device.staticIdentity.mutex.RLock()
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defer device.staticIdentity.mutex.RUnlock()
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device.peers.mutex.Lock()
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defer device.peers.mutex.Unlock()
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@ -96,7 +92,7 @@ func (device *Device) NewPeer(pk NoisePublicKey) (*Peer, error) {
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peer.mutex.Lock()
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defer peer.mutex.Unlock()
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peer.mac.Init(pk)
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peer.cookieGenerator.Init(pk)
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peer.device = device
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peer.isRunning.Set(false)
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@ -113,7 +109,7 @@ func (device *Device) NewPeer(pk NoisePublicKey) (*Peer, error) {
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handshake := &peer.handshake
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handshake.mutex.Lock()
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handshake.remoteStatic = pk
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handshake.precomputedStaticStatic = device.noise.privateKey.sharedSecret(pk)
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handshake.precomputedStaticStatic = device.staticIdentity.privateKey.sharedSecret(pk)
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handshake.mutex.Unlock()
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// reset endpoint
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@ -191,6 +187,7 @@ func (peer *Peer) Start() {
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peer.queue.inbound = make(chan *QueueInboundElement, QueueInboundSize)
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peer.timersInit()
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peer.handshake.lastSentHandshake = time.Now().Add(-(RekeyTimeout + time.Second))
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peer.signals.newKeypairArrived = make(chan struct{}, 1)
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peer.signals.flushNonceQueue = make(chan struct{}, 1)
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@ -204,6 +201,32 @@ func (peer *Peer) Start() {
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peer.isRunning.Set(true)
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}
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func (peer *Peer) ZeroAndFlushAll() {
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device := peer.device
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// clear key pairs
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keypairs := &peer.keypairs
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keypairs.mutex.Lock()
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device.DeleteKeypair(keypairs.previous)
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device.DeleteKeypair(keypairs.current)
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device.DeleteKeypair(keypairs.next)
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keypairs.previous = nil
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keypairs.current = nil
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keypairs.next = nil
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keypairs.mutex.Unlock()
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// clear handshake state
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handshake := &peer.handshake
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handshake.mutex.Lock()
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device.indexTable.Delete(handshake.localIndex)
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handshake.Clear()
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handshake.mutex.Unlock()
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peer.FlushNonceQueue()
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}
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func (peer *Peer) Stop() {
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// prevent simultaneous start/stop operations
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@ -215,8 +238,7 @@ func (peer *Peer) Stop() {
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return
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}
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device := peer.device
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device.log.Debug.Println(peer, ": Stopping...")
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peer.device.log.Debug.Println(peer, ": Stopping...")
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peer.timersStop()
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||||
|
||||
@ -232,27 +254,5 @@ func (peer *Peer) Stop() {
|
||||
close(peer.queue.outbound)
|
||||
close(peer.queue.inbound)
|
||||
|
||||
// clear key pairs
|
||||
|
||||
kp := &peer.keypairs
|
||||
kp.mutex.Lock()
|
||||
|
||||
device.DeleteKeypair(kp.previous)
|
||||
device.DeleteKeypair(kp.current)
|
||||
device.DeleteKeypair(kp.next)
|
||||
|
||||
kp.previous = nil
|
||||
kp.current = nil
|
||||
kp.next = nil
|
||||
kp.mutex.Unlock()
|
||||
|
||||
// clear handshake state
|
||||
|
||||
hs := &peer.handshake
|
||||
hs.mutex.Lock()
|
||||
device.indexTable.Delete(hs.localIndex)
|
||||
hs.Clear()
|
||||
hs.mutex.Unlock()
|
||||
|
||||
peer.FlushNonceQueue()
|
||||
peer.ZeroAndFlushAll()
|
||||
}
|
||||
|
||||
78
receive.go
78
receive.go
@ -107,8 +107,8 @@ func (peer *Peer) keepKeyFreshReceiving() {
|
||||
if peer.timers.sentLastMinuteHandshake {
|
||||
return
|
||||
}
|
||||
kp := peer.keypairs.Current()
|
||||
if kp != nil && kp.isInitiator && time.Now().Sub(kp.created) > (RejectAfterTime-KeepaliveTimeout-RekeyTimeout) {
|
||||
keypair := peer.keypairs.Current()
|
||||
if keypair != nil && keypair.isInitiator && time.Now().Sub(keypair.created) > (RejectAfterTime-KeepaliveTimeout-RekeyTimeout) {
|
||||
peer.timers.sentLastMinuteHandshake = true
|
||||
peer.SendHandshakeInitiation(false)
|
||||
}
|
||||
@ -325,7 +325,6 @@ func (device *Device) RoutineHandshake() {
|
||||
|
||||
logDebug.Println("Routine: handshake worker - started")
|
||||
|
||||
var temp [MessageHandshakeSize]byte
|
||||
var elem QueueHandshakeElement
|
||||
var ok bool
|
||||
|
||||
@ -367,52 +366,28 @@ func (device *Device) RoutineHandshake() {
|
||||
// consume reply
|
||||
|
||||
if peer := entry.peer; peer.isRunning.Get() {
|
||||
peer.mac.ConsumeReply(&reply)
|
||||
peer.cookieGenerator.ConsumeReply(&reply)
|
||||
}
|
||||
|
||||
continue
|
||||
|
||||
case MessageInitiationType, MessageResponseType:
|
||||
|
||||
// check mac fields and ratelimit
|
||||
// check mac fields and maybe ratelimit
|
||||
|
||||
if !device.mac.CheckMAC1(elem.packet) {
|
||||
if !device.cookieChecker.CheckMAC1(elem.packet) {
|
||||
logDebug.Println("Received packet with invalid mac1")
|
||||
continue
|
||||
}
|
||||
|
||||
// endpoints destination address is the source of the datagram
|
||||
|
||||
srcBytes := elem.endpoint.DstToBytes()
|
||||
|
||||
if device.IsUnderLoad() {
|
||||
|
||||
// verify MAC2 field
|
||||
|
||||
if !device.mac.CheckMAC2(elem.packet, srcBytes) {
|
||||
|
||||
// construct cookie reply
|
||||
|
||||
logDebug.Println(
|
||||
"Sending cookie reply to:",
|
||||
elem.endpoint.DstToString(),
|
||||
)
|
||||
|
||||
sender := binary.LittleEndian.Uint32(elem.packet[4:8])
|
||||
reply, err := device.mac.CreateReply(elem.packet, sender, srcBytes)
|
||||
if err != nil {
|
||||
logError.Println("Failed to create cookie reply:", err)
|
||||
continue
|
||||
}
|
||||
|
||||
// marshal and send reply
|
||||
|
||||
writer := bytes.NewBuffer(temp[:0])
|
||||
binary.Write(writer, binary.LittleEndian, reply)
|
||||
device.net.bind.Send(writer.Bytes(), elem.endpoint)
|
||||
if err != nil {
|
||||
logDebug.Println("Failed to send cookie reply:", err)
|
||||
}
|
||||
if !device.cookieChecker.CheckMAC2(elem.packet, elem.endpoint.DstToBytes()) {
|
||||
device.SendHandshakeCookie(&elem)
|
||||
continue
|
||||
}
|
||||
|
||||
@ -467,34 +442,7 @@ func (device *Device) RoutineHandshake() {
|
||||
|
||||
logDebug.Println(peer, ": Received handshake initiation")
|
||||
|
||||
// create response
|
||||
|
||||
response, err := device.CreateMessageResponse(peer)
|
||||
if err != nil {
|
||||
logError.Println("Failed to create response message:", err)
|
||||
continue
|
||||
}
|
||||
|
||||
if peer.DeriveNewKeypair() != nil {
|
||||
continue
|
||||
}
|
||||
|
||||
logDebug.Println(peer, ": Sending handshake response")
|
||||
|
||||
writer := bytes.NewBuffer(temp[:0])
|
||||
binary.Write(writer, binary.LittleEndian, response)
|
||||
packet := writer.Bytes()
|
||||
peer.mac.AddMacs(packet)
|
||||
|
||||
// send response
|
||||
|
||||
peer.timers.lastSentHandshake = time.Now()
|
||||
err = peer.SendBuffer(packet)
|
||||
if err == nil {
|
||||
peer.timersAnyAuthenticatedPacketTraversal()
|
||||
} else {
|
||||
logError.Println(peer, ": Failed to send handshake response", err)
|
||||
}
|
||||
peer.SendHandshakeResponse()
|
||||
|
||||
case MessageResponseType:
|
||||
|
||||
@ -534,10 +482,14 @@ func (device *Device) RoutineHandshake() {
|
||||
|
||||
// derive keypair
|
||||
|
||||
if peer.DeriveNewKeypair() != nil {
|
||||
err = peer.BeginSymmetricSession()
|
||||
|
||||
if err != nil {
|
||||
logError.Println(peer, ": Failed to derive keypair:", err)
|
||||
continue
|
||||
}
|
||||
|
||||
peer.timersSessionDerived()
|
||||
peer.timersHandshakeComplete()
|
||||
peer.SendKeepalive()
|
||||
select {
|
||||
@ -640,7 +592,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
|
||||
// verify IPv4 source
|
||||
|
||||
src := elem.packet[IPv4offsetSrc : IPv4offsetSrc+net.IPv4len]
|
||||
if device.routing.table.LookupIPv4(src) != peer {
|
||||
if device.allowedips.LookupIPv4(src) != peer {
|
||||
logInfo.Println(
|
||||
"IPv4 packet with disallowed source address from",
|
||||
peer,
|
||||
@ -668,7 +620,7 @@ func (peer *Peer) RoutineSequentialReceiver() {
|
||||
// verify IPv6 source
|
||||
|
||||
src := elem.packet[IPv6offsetSrc : IPv6offsetSrc+net.IPv6len]
|
||||
if device.routing.table.LookupIPv6(src) != peer {
|
||||
if device.allowedips.LookupIPv6(src) != peer {
|
||||
logInfo.Println(
|
||||
peer,
|
||||
"sent packet with disallowed IPv6 source",
|
||||
|
||||
108
send.go
108
send.go
@ -121,52 +121,114 @@ func (peer *Peer) SendKeepalive() bool {
|
||||
}
|
||||
}
|
||||
|
||||
/* Sends a new handshake initiation message to the peer (endpoint)
|
||||
*/
|
||||
func (peer *Peer) SendHandshakeInitiation(isRetry bool) error {
|
||||
if !isRetry {
|
||||
peer.timers.handshakeAttempts = 0
|
||||
}
|
||||
|
||||
if time.Now().Sub(peer.timers.lastSentHandshake) < RekeyTimeout {
|
||||
peer.handshake.mutex.RLock()
|
||||
if time.Now().Sub(peer.handshake.lastSentHandshake) < RekeyTimeout {
|
||||
peer.handshake.mutex.RUnlock()
|
||||
return nil
|
||||
}
|
||||
peer.timers.lastSentHandshake = time.Now() //TODO: locking for this variable?
|
||||
peer.handshake.mutex.RUnlock()
|
||||
|
||||
// create initiation message
|
||||
|
||||
msg, err := peer.device.CreateMessageInitiation(peer)
|
||||
if err != nil {
|
||||
return err
|
||||
peer.handshake.mutex.Lock()
|
||||
if time.Now().Sub(peer.handshake.lastSentHandshake) < RekeyTimeout {
|
||||
peer.handshake.mutex.Unlock()
|
||||
return nil
|
||||
}
|
||||
peer.handshake.lastSentHandshake = time.Now()
|
||||
peer.handshake.mutex.Unlock()
|
||||
|
||||
peer.device.log.Debug.Println(peer, ": Sending handshake initiation")
|
||||
|
||||
// marshal handshake message
|
||||
msg, err := peer.device.CreateMessageInitiation(peer)
|
||||
if err != nil {
|
||||
peer.device.log.Error.Println(peer, ": Failed to create initiation message:", err)
|
||||
return err
|
||||
}
|
||||
|
||||
var buff [MessageInitiationSize]byte
|
||||
writer := bytes.NewBuffer(buff[:0])
|
||||
binary.Write(writer, binary.LittleEndian, msg)
|
||||
packet := writer.Bytes()
|
||||
peer.mac.AddMacs(packet)
|
||||
|
||||
// send to endpoint
|
||||
peer.cookieGenerator.AddMacs(packet)
|
||||
|
||||
peer.timersAnyAuthenticatedPacketTraversal()
|
||||
|
||||
err = peer.SendBuffer(packet)
|
||||
if err != nil {
|
||||
peer.device.log.Error.Println(peer, ": Failed to send handshake initiation", err)
|
||||
}
|
||||
peer.timersHandshakeInitiated()
|
||||
return peer.SendBuffer(packet)
|
||||
|
||||
return err
|
||||
}
|
||||
|
||||
func (peer *Peer) SendHandshakeResponse() error {
|
||||
peer.handshake.mutex.Lock()
|
||||
peer.handshake.lastSentHandshake = time.Now()
|
||||
peer.handshake.mutex.Unlock()
|
||||
|
||||
peer.device.log.Debug.Println(peer, ": Sending handshake response")
|
||||
|
||||
response, err := peer.device.CreateMessageResponse(peer)
|
||||
if err != nil {
|
||||
peer.device.log.Error.Println(peer, ": Failed to create response message:", err)
|
||||
return err
|
||||
}
|
||||
|
||||
var buff [MessageResponseSize]byte
|
||||
writer := bytes.NewBuffer(buff[:0])
|
||||
binary.Write(writer, binary.LittleEndian, response)
|
||||
packet := writer.Bytes()
|
||||
peer.cookieGenerator.AddMacs(packet)
|
||||
|
||||
err = peer.BeginSymmetricSession()
|
||||
if err != nil {
|
||||
peer.device.log.Error.Println(peer, ": Failed to derive keypair:", err)
|
||||
return err
|
||||
}
|
||||
|
||||
peer.timersSessionDerived()
|
||||
peer.timersAnyAuthenticatedPacketTraversal()
|
||||
|
||||
err = peer.SendBuffer(packet)
|
||||
if err != nil {
|
||||
peer.device.log.Error.Println(peer, ": Failed to send handshake response", err)
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
func (device *Device) SendHandshakeCookie(initiatingElem *QueueHandshakeElement) error {
|
||||
|
||||
device.log.Debug.Println("Sending cookie reply to:", initiatingElem.endpoint.DstToString())
|
||||
|
||||
sender := binary.LittleEndian.Uint32(initiatingElem.packet[4:8])
|
||||
reply, err := device.cookieChecker.CreateReply(initiatingElem.packet, sender, initiatingElem.endpoint.DstToBytes())
|
||||
if err != nil {
|
||||
device.log.Error.Println("Failed to create cookie reply:", err)
|
||||
return err
|
||||
}
|
||||
|
||||
var buff [MessageCookieReplySize]byte
|
||||
writer := bytes.NewBuffer(buff[:0])
|
||||
binary.Write(writer, binary.LittleEndian, reply)
|
||||
device.net.bind.Send(writer.Bytes(), initiatingElem.endpoint)
|
||||
if err != nil {
|
||||
device.log.Error.Println("Failed to send cookie reply:", err)
|
||||
}
|
||||
return err
|
||||
}
|
||||
|
||||
/* Called when a new authenticated message has been send
|
||||
*
|
||||
*/
|
||||
func (peer *Peer) keepKeyFreshSending() {
|
||||
kp := peer.keypairs.Current()
|
||||
if kp == nil {
|
||||
keypair := peer.keypairs.Current()
|
||||
if keypair == nil {
|
||||
return
|
||||
}
|
||||
nonce := atomic.LoadUint64(&kp.sendNonce)
|
||||
if nonce > RekeyAfterMessages || (kp.isInitiator && time.Now().Sub(kp.created) > RekeyAfterTime) {
|
||||
nonce := atomic.LoadUint64(&keypair.sendNonce)
|
||||
if nonce > RekeyAfterMessages || (keypair.isInitiator && time.Now().Sub(keypair.created) > RekeyAfterTime) {
|
||||
peer.SendHandshakeInitiation(false)
|
||||
}
|
||||
}
|
||||
@ -217,14 +279,14 @@ func (device *Device) RoutineReadFromTUN() {
|
||||
continue
|
||||
}
|
||||
dst := elem.packet[IPv4offsetDst : IPv4offsetDst+net.IPv4len]
|
||||
peer = device.routing.table.LookupIPv4(dst)
|
||||
peer = device.allowedips.LookupIPv4(dst)
|
||||
|
||||
case ipv6.Version:
|
||||
if len(elem.packet) < ipv6.HeaderLen {
|
||||
continue
|
||||
}
|
||||
dst := elem.packet[IPv6offsetDst : IPv6offsetDst+net.IPv6len]
|
||||
peer = device.routing.table.LookupIPv6(dst)
|
||||
peer = device.allowedips.LookupIPv6(dst)
|
||||
|
||||
default:
|
||||
logDebug.Println("Received packet with unknown IP version")
|
||||
|
||||
26
timers.go
26
timers.go
@ -104,30 +104,7 @@ func expiredNewHandshake(peer *Peer) {
|
||||
|
||||
func expiredZeroKeyMaterial(peer *Peer) {
|
||||
peer.device.log.Debug.Printf(":%s Removing all keys, since we haven't received a new one in %d seconds\n", peer, int((RejectAfterTime * 3).Seconds()))
|
||||
|
||||
hs := &peer.handshake
|
||||
hs.mutex.Lock()
|
||||
|
||||
kp := &peer.keypairs
|
||||
kp.mutex.Lock()
|
||||
|
||||
if kp.previous != nil {
|
||||
peer.device.DeleteKeypair(kp.previous)
|
||||
kp.previous = nil
|
||||
}
|
||||
if kp.current != nil {
|
||||
peer.device.DeleteKeypair(kp.current)
|
||||
kp.current = nil
|
||||
}
|
||||
if kp.next != nil {
|
||||
peer.device.DeleteKeypair(kp.next)
|
||||
kp.next = nil
|
||||
}
|
||||
kp.mutex.Unlock()
|
||||
|
||||
peer.device.indexTable.Delete(hs.localIndex)
|
||||
hs.Clear()
|
||||
hs.mutex.Unlock()
|
||||
peer.ZeroAndFlushAll()
|
||||
}
|
||||
|
||||
func expiredPersistentKeepalive(peer *Peer) {
|
||||
@ -209,7 +186,6 @@ func (peer *Peer) timersInit() {
|
||||
peer.timers.handshakeAttempts = 0
|
||||
peer.timers.sentLastMinuteHandshake = false
|
||||
peer.timers.needAnotherKeepalive = false
|
||||
peer.timers.lastSentHandshake = time.Now().Add(-(RekeyTimeout + time.Second))
|
||||
}
|
||||
|
||||
func (peer *Peer) timersStop() {
|
||||
|
||||
34
uapi.go
34
uapi.go
@ -46,19 +46,16 @@ func ipcGetOperation(device *Device, socket *bufio.ReadWriter) *IPCError {
|
||||
device.net.mutex.RLock()
|
||||
defer device.net.mutex.RUnlock()
|
||||
|
||||
device.noise.mutex.RLock()
|
||||
defer device.noise.mutex.RUnlock()
|
||||
device.staticIdentity.mutex.RLock()
|
||||
defer device.staticIdentity.mutex.RUnlock()
|
||||
|
||||
device.routing.mutex.RLock()
|
||||
defer device.routing.mutex.RUnlock()
|
||||
|
||||
device.peers.mutex.Lock()
|
||||
defer device.peers.mutex.Unlock()
|
||||
device.peers.mutex.RLock()
|
||||
defer device.peers.mutex.RUnlock()
|
||||
|
||||
// serialize device related values
|
||||
|
||||
if !device.noise.privateKey.IsZero() {
|
||||
send("private_key=" + device.noise.privateKey.ToHex())
|
||||
if !device.staticIdentity.privateKey.IsZero() {
|
||||
send("private_key=" + device.staticIdentity.privateKey.ToHex())
|
||||
}
|
||||
|
||||
if device.net.port != 0 {
|
||||
@ -91,7 +88,7 @@ func ipcGetOperation(device *Device, socket *bufio.ReadWriter) *IPCError {
|
||||
send(fmt.Sprintf("rx_bytes=%d", peer.stats.rxBytes))
|
||||
send(fmt.Sprintf("persistent_keepalive_interval=%d", peer.persistentKeepaliveInterval))
|
||||
|
||||
for _, ip := range device.routing.table.EntriesForPeer(peer) {
|
||||
for _, ip := range device.allowedips.EntriesForPeer(peer) {
|
||||
send("allowed_ip=" + ip.String())
|
||||
}
|
||||
|
||||
@ -234,13 +231,12 @@ func ipcSetOperation(device *Device, socket *bufio.ReadWriter) *IPCError {
|
||||
|
||||
// ignore peer with public key of device
|
||||
|
||||
device.noise.mutex.RLock()
|
||||
equals := device.noise.publicKey.Equals(publicKey)
|
||||
device.noise.mutex.RUnlock()
|
||||
device.staticIdentity.mutex.RLock()
|
||||
dummy = device.staticIdentity.publicKey.Equals(publicKey)
|
||||
device.staticIdentity.mutex.RUnlock()
|
||||
|
||||
if equals {
|
||||
if dummy {
|
||||
peer = &Peer{}
|
||||
dummy = true
|
||||
}
|
||||
|
||||
// find peer referenced
|
||||
@ -348,9 +344,7 @@ func ipcSetOperation(device *Device, socket *bufio.ReadWriter) *IPCError {
|
||||
continue
|
||||
}
|
||||
|
||||
device.routing.mutex.Lock()
|
||||
device.routing.table.RemoveByPeer(peer)
|
||||
device.routing.mutex.Unlock()
|
||||
device.allowedips.RemoveByPeer(peer)
|
||||
|
||||
case "allowed_ip":
|
||||
|
||||
@ -367,9 +361,7 @@ func ipcSetOperation(device *Device, socket *bufio.ReadWriter) *IPCError {
|
||||
}
|
||||
|
||||
ones, _ := network.Mask.Size()
|
||||
device.routing.mutex.Lock()
|
||||
device.routing.table.Insert(network.IP, uint(ones), peer)
|
||||
device.routing.mutex.Unlock()
|
||||
device.allowedips.Insert(network.IP, uint(ones), peer)
|
||||
|
||||
default:
|
||||
logError.Println("Invalid UAPI key (peer configuration):", key)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user