test: add signal encryption test

.github/workflows/golang-test.yml

@@ -0,0 +1,21 @@
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+name: Test
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.16.x]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Test
+        run: go test ./...

signal/encryption.go

@@ -14,24 +14,24 @@ import (
 // Wireguard keys are used for encryption
 
 // Encrypt encrypts a message using local Wireguard private key and remote peer's public key.
-func Encrypt(msg []byte, peersPublicKey wgtypes.Key, privateKey wgtypes.Key) ([]byte, error) {
+func Encrypt(msg []byte, peerPublicKey wgtypes.Key, privateKey wgtypes.Key) ([]byte, error) {
 	nonce, err := genNonce()
 	if err != nil {
 		return nil, err
 	}
-	return box.Seal(nonce[:], msg, nonce, toByte32(peersPublicKey), toByte32(privateKey)), nil
+	return box.Seal(nonce[:], msg, nonce, toByte32(peerPublicKey), toByte32(privateKey)), nil
 }
 
 // Decrypt decrypts a message that has been encrypted by the remote peer using Wireguard private key and remote peer's public key.
-func Decrypt(encryptedMsg []byte, peersPublicKey wgtypes.Key, privateKey wgtypes.Key) ([]byte, error) {
+func Decrypt(encryptedMsg []byte, peerPublicKey wgtypes.Key, privateKey wgtypes.Key) ([]byte, error) {
 	nonce, err := genNonce()
 	if err != nil {
 		return nil, err
 	}
 	copy(nonce[:], encryptedMsg[:24])
-	opened, ok := box.Open(nil, encryptedMsg[24:], nonce, toByte32(peersPublicKey), toByte32(privateKey))
+	opened, ok := box.Open(nil, encryptedMsg[24:], nonce, toByte32(peerPublicKey), toByte32(privateKey))
 	if !ok {
-		return nil, fmt.Errorf("failed to decrypt message from peer %s", peersPublicKey.String())
+		return nil, fmt.Errorf("failed to decrypt message from peer %s", peerPublicKey.String())
 	}
 
 	return opened, nil

signal/encryption_test.go

@@ -0,0 +1,40 @@
+package signal
+
+import (
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
+	"testing"
+)
+
+func TestEncryptDecrypt(t *testing.T) {
+	strMsg := "message to encrypt"
+	bytesMsg := []byte(strMsg)
+
+	peerAKey, err := wgtypes.GenerateKey()
+	if err != nil {
+		t.Error()
+		return
+	}
+
+	peerBKey, err := wgtypes.GenerateKey()
+	if err != nil {
+		t.Error()
+		return
+	}
+
+	encryptedMessage, err := Encrypt(bytesMsg, peerBKey.PublicKey(), peerAKey)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	decryptedMessage, err := Decrypt(encryptedMessage, peerAKey.PublicKey(), peerBKey)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	if string(decryptedMessage) != strMsg {
+		t.Error()
+	}
+
+}

signal/peer/peer.go

@@ -47,8 +47,8 @@ func (reg *Registry) Register(peer *Peer) {
 	reg.Peers[peer.Id] = peer
 }
 
-// DeregisterHub deregister Peer from the Registry (usually once it disconnects)
-func (reg *Registry) DeregisterHub(peer *Peer) {
+// Deregister deregister Peer from the Registry (usually once it disconnects)
+func (reg *Registry) Deregister(peer *Peer) {
 	if _, ok := reg.Peers[peer.Id]; ok {
 		delete(reg.Peers, peer.Id)
 		log.Printf("deregistered peer [%s]", peer.Id)

signal/peer/peer_test.go

@@ -0,0 +1,48 @@
+package peer
+
+import (
+	"testing"
+)
+
+func TestRegistry_Register(t *testing.T) {
+	r := NewRegistry()
+	peer1 := NewPeer("test_peer_1", nil)
+	peer2 := NewPeer("test_peer_2", nil)
+	r.Register(peer1)
+	r.Register(peer2)
+
+	if len(r.Peers) != 2 {
+		t.Errorf("expected 2 registered peers")
+	}
+
+	if _, ok := r.Peers["test_peer_1"]; !ok {
+		t.Errorf("expected test_peer_1 not found in the registry")
+	}
+
+	if _, ok := r.Peers["test_peer_2"]; !ok {
+		t.Errorf("expected test_peer_2 not found in the registry")
+	}
+}
+
+func TestRegistry_Deregister(t *testing.T) {
+	r := NewRegistry()
+	peer1 := NewPeer("test_peer_1", nil)
+	peer2 := NewPeer("test_peer_2", nil)
+	r.Register(peer1)
+	r.Register(peer2)
+
+	r.Deregister(peer1)
+
+	if len(r.Peers) != 1 {
+		t.Errorf("expected 1 registered peers after deregistring")
+	}
+
+	if _, ok := r.Peers["test_peer_1"]; ok {
+		t.Errorf("expected test_peer_1 to absent in the registry after deregistering")
+	}
+
+	if _, ok := r.Peers["test_peer_2"]; !ok {
+		t.Errorf("expected test_peer_2 not found in the registry")
+	}
+
+}