feat: add first page with auth and containers list and agents

server/internal/auth/auth.go

@@ -0,0 +1,49 @@
+package auth
+
+import (
+	"errors"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+type Claims struct {
+	UserID string `json:"uid"`
+	jwt.RegisteredClaims
+}
+
+type Service struct {
+	secret []byte
+}
+
+func New(secret string) *Service {
+	return &Service{secret: []byte(secret)}
+}
+
+func (s *Service) Sign(userID string) (string, error) {
+	claims := Claims{
+		UserID: userID,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+		},
+	}
+	return jwt.NewWithClaims(jwt.SigningMethodHS256, claims).SignedString(s.secret)
+}
+
+func (s *Service) Verify(tokenStr string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenStr, &Claims{}, func(t *jwt.Token) (any, error) {
+		if _, ok := t.Method.(*jwt.SigningMethodHMAC); !ok {
+			return nil, errors.New("unexpected signing method")
+		}
+		return s.secret, nil
+	})
+	if err != nil {
+		return nil, err
+	}
+	claims, ok := token.Claims.(*Claims)
+	if !ok || !token.Valid {
+		return nil, errors.New("invalid token")
+	}
+	return claims, nil
+}

server/internal/auth/auth_test.go

@@ -0,0 +1,64 @@
+package auth
+
+import (
+	"testing"
+	"time"
+)
+
+func TestSignAndVerify(t *testing.T) {
+	svc := New("test-secret")
+
+	token, err := svc.Sign("user42")
+	if err != nil {
+		t.Fatalf("Sign: %v", err)
+	}
+	if token == "" {
+		t.Fatal("expected non-empty token")
+	}
+
+	claims, err := svc.Verify(token)
+	if err != nil {
+		t.Fatalf("Verify: %v", err)
+	}
+	if claims.UserID != "user42" {
+		t.Errorf("expected UserID 'user42', got %q", claims.UserID)
+	}
+	if claims.ExpiresAt == nil || claims.ExpiresAt.Before(time.Now()) {
+		t.Error("token should not be expired")
+	}
+}
+
+func TestVerify_InvalidToken(t *testing.T) {
+	svc := New("test-secret")
+	_, err := svc.Verify("not.a.valid.token")
+	if err == nil {
+		t.Fatal("expected error for invalid token")
+	}
+}
+
+func TestVerify_WrongSecret(t *testing.T) {
+	svc1 := New("secret-a")
+	svc2 := New("secret-b")
+
+	token, err := svc1.Sign("user1")
+	if err != nil {
+		t.Fatalf("Sign: %v", err)
+	}
+
+	_, err = svc2.Verify(token)
+	if err == nil {
+		t.Fatal("expected error when verifying with different secret")
+	}
+}
+
+func TestVerify_TamperedToken(t *testing.T) {
+	svc := New("test-secret")
+	token, _ := svc.Sign("admin")
+
+	// Append garbage to corrupt the signature.
+	tampered := token + "x"
+	_, err := svc.Verify(tampered)
+	if err == nil {
+		t.Fatal("expected error for tampered token")
+	}
+}