fix(plugin): respect --insecure (#7022)

Signed-off-by: knqyf263 <knqyf263@gmail.com>

pkg/commands/app.go

@@ -62,6 +62,7 @@ Use "{{.CommandPath}} [command] --help" for more information about a command.{{e
 
 // NewApp is the factory method to return Trivy CLI
 func NewApp() *cobra.Command {
+	cobra.EnableTraverseRunHooks = true // To execute persistent pre-run hooks from all parents.
 	globalFlags := flag.NewGlobalFlagGroup()
 	rootCmd := NewRootCommand(globalFlags)
 	rootCmd.AddGroup(
@@ -89,7 +90,7 @@ func NewApp() *cobra.Command {
 		NewServerCommand(globalFlags),
 		NewConfigCommand(globalFlags),
 		NewConvertCommand(globalFlags),
-		NewPluginCommand(),
+		NewPluginCommand(globalFlags),
 		NewModuleCommand(globalFlags),
 		NewKubernetesCommand(globalFlags),
 		NewSBOMCommand(globalFlags),
@@ -719,14 +720,25 @@ func NewConfigCommand(globalFlags *flag.GlobalFlagGroup) *cobra.Command {
 	return cmd
 }
 
-func NewPluginCommand() *cobra.Command {
+func NewPluginCommand(globalFlags *flag.GlobalFlagGroup) *cobra.Command {
+	var pluginOptions flag.Options
+	pluginFlags := &flag.Flags{
+		GlobalFlagGroup: globalFlags,
+	}
 	cmd := &cobra.Command{
 		Use:           "plugin subcommand",
 		Aliases:       []string{"p"},
 		GroupID:       groupManagement,
 		Short:         "Manage plugins",
 		SilenceErrors: true,
 		SilenceUsage:  true,
+		PersistentPreRunE: func(cmd *cobra.Command, args []string) (err error) {
+			pluginOptions, err = pluginFlags.ToOptions(args)
+			if err != nil {
+				return err
+			}
+			return nil
+		},
 	}
 	cmd.AddCommand(
 		&cobra.Command{
@@ -746,7 +758,7 @@ func NewPluginCommand() *cobra.Command {
 			DisableFlagsInUseLine: true,
 			Args:                  cobra.ExactArgs(1),
 			RunE: func(cmd *cobra.Command, args []string) error {
-				if _, err := plugin.Install(cmd.Context(), args[0], plugin.Options{}); err != nil {
+				if _, err := plugin.Install(cmd.Context(), args[0], plugin.Options{Insecure: pluginOptions.Insecure}); err != nil {
 					return xerrors.Errorf("plugin install error: %w", err)
 				}
 				return nil
@@ -805,7 +817,10 @@ func NewPluginCommand() *cobra.Command {
 			Short:                 "Run a plugin on the fly",
 			Args:                  cobra.MinimumNArgs(1),
 			RunE: func(cmd *cobra.Command, args []string) error {
-				return plugin.Run(cmd.Context(), args[0], plugin.Options{Args: args[1:]})
+				return plugin.Run(cmd.Context(), args[0], plugin.Options{
+					Args:     args[1:],
+					Insecure: pluginOptions.Insecure,
+				})
 			},
 		},
 		&cobra.Command{
@@ -816,7 +831,7 @@ func NewPluginCommand() *cobra.Command {
 			SilenceUsage:          true,
 			Args:                  cobra.NoArgs,
 			RunE: func(cmd *cobra.Command, _ []string) error {
-				if err := plugin.Update(cmd.Context()); err != nil {
+				if err := plugin.Update(cmd.Context(), plugin.Options{Insecure: pluginOptions.Insecure}); err != nil {
 					return xerrors.Errorf("plugin update error: %w", err)
 				}
 				return nil

pkg/downloader/download.go

@@ -10,8 +10,8 @@ import (
 )
 
 // DownloadToTempDir downloads the configured source to a temp dir.
-func DownloadToTempDir(ctx context.Context, url string) (string, error) {
-	tempDir, err := os.MkdirTemp("", "trivy-plugin")
+func DownloadToTempDir(ctx context.Context, url string, insecure bool) (string, error) {
+	tempDir, err := os.MkdirTemp("", "trivy-download")
 	if err != nil {
 		return "", xerrors.Errorf("failed to create a temp dir: %w", err)
 	}
@@ -21,26 +21,37 @@ func DownloadToTempDir(ctx context.Context, url string) (string, error) {
 		return "", xerrors.Errorf("unable to get the current dir: %w", err)
 	}
 
-	if err = Download(ctx, url, tempDir, pwd); err != nil {
+	if err = Download(ctx, url, tempDir, pwd, insecure); err != nil {
 		return "", xerrors.Errorf("download error: %w", err)
 	}
 
 	return tempDir, nil
 }
 
 // Download downloads the configured source to the destination.
-func Download(ctx context.Context, src, dst, pwd string) error {
+func Download(ctx context.Context, src, dst, pwd string, insecure bool) error {
 	// go-getter doesn't allow the dst directory already exists if the src is directory.
 	_ = os.RemoveAll(dst)
 
 	var opts []getter.ClientOption
+	if insecure {
+		opts = append(opts, getter.WithInsecure())
+	}
 
 	// Clone the global map so that it will not be accessed concurrently.
 	getters := maps.Clone(getter.Getters)
 
 	// Overwrite the file getter so that a file will be copied
 	getters["file"] = &getter.FileGetter{Copy: true}
 
+	// Since "httpGetter" is a global pointer and the state is shared,
+	// once it is executed without "WithInsecure()",
+	// it cannot enable WithInsecure() afterwards because its state is preserved.
+	// cf. https://github.com/hashicorp/go-getter/blob/5a63fd9c0d5b8da8a6805e8c283f46f0dacb30b3/get.go#L63-L65
+	httpGetter := &getter.HttpGetter{Netrc: true}
+	getters["http"] = httpGetter
+	getters["https"] = httpGetter
+
 	// Build the client
 	client := &getter.Client{
 		Ctx:     ctx,

pkg/downloader/downloader_test.go

@@ -0,0 +1,61 @@
+package downloader_test
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/aquasecurity/trivy/pkg/downloader"
+)
+
+func TestDownload(t *testing.T) {
+	// Set up a test server with a self-signed certificate
+	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		_, err := w.Write([]byte("test content"))
+		require.NoError(t, err)
+	}))
+	defer server.Close()
+
+	tests := []struct {
+		name     string
+		insecure bool
+		wantErr  bool
+	}{
+		{
+			"Secure (should fail)",
+			false,
+			true,
+		},
+		{
+			"Insecure (should succeed)",
+			true,
+			false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Set up the destination path
+			dst := t.TempDir()
+
+			// Execute the download
+			err := downloader.Download(context.Background(), server.URL, dst, "", tt.insecure)
+
+			if tt.wantErr {
+				assert.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+
+			// Check the content of the downloaded file
+			content, err := os.ReadFile(dst)
+			require.NoError(t, err)
+			assert.Equal(t, "test content", string(content))
+		})
+	}
+}

pkg/oci/artifact.go

@@ -188,7 +188,8 @@ func (a *Artifact) download(ctx context.Context, layer v1.Layer, fileName, dir s
 	}
 
 	// Decompress the downloaded file if it is compressed and copy it into the dst
-	if err = downloader.Download(ctx, f.Name(), dir, dir); err != nil {
+	// NOTE: it's local copying, the insecure option doesn't matter.
+	if err = downloader.Download(ctx, f.Name(), dir, dir, false); err != nil {
 		return xerrors.Errorf("download error: %w", err)
 	}
 

pkg/plugin/index.go

@@ -32,9 +32,9 @@ type Index struct {
 	} `yaml:"plugins"`
 }
 
-func (m *Manager) Update(ctx context.Context) error {
+func (m *Manager) Update(ctx context.Context, opts Options) error {
 	m.logger.InfoContext(ctx, "Updating the plugin index...", log.String("url", m.indexURL))
-	if err := downloader.Download(ctx, m.indexURL, filepath.Dir(m.indexPath), ""); err != nil {
+	if err := downloader.Download(ctx, m.indexURL, filepath.Dir(m.indexPath), "", opts.Insecure); err != nil {
 		return xerrors.Errorf("unable to download the plugin index: %w", err)
 	}
 	return nil
@@ -69,10 +69,10 @@ func (m *Manager) Search(ctx context.Context, keyword string) error {
 
 // tryIndex returns the repository URL if the plugin name is found in the index.
 // Otherwise, it returns the input name.
-func (m *Manager) tryIndex(ctx context.Context, name string) string {
+func (m *Manager) tryIndex(ctx context.Context, name string, opts Options) string {
 	// If the index file does not exist, download it first.
 	if !fsutils.FileExists(m.indexPath) {
-		if err := m.Update(ctx); err != nil {
+		if err := m.Update(ctx, opts); err != nil {
 			m.logger.ErrorContext(ctx, "Failed to update the plugin index", log.Err(err))
 			return name
 		}

pkg/plugin/index_test.go

@@ -26,7 +26,7 @@ func TestManager_Update(t *testing.T) {
 	t.Cleanup(ts.Close)
 
 	manager := plugin.NewManager(plugin.WithIndexURL(ts.URL + "/index.yaml"))
-	err := manager.Update(context.Background())
+	err := manager.Update(context.Background(), plugin.Options{})
 	require.NoError(t, err)
 
 	indexPath := filepath.Join(tempDir, ".trivy", "plugins", "index.yaml")

pkg/plugin/manager.go

@@ -92,13 +92,13 @@ func Upgrade(ctx context.Context, names []string) error { return defaultManager(
 func Uninstall(ctx context.Context, name string) error  { return defaultManager().Uninstall(ctx, name) }
 func Information(name string) error                     { return defaultManager().Information(name) }
 func List(ctx context.Context) error                    { return defaultManager().List(ctx) }
-func Update(ctx context.Context) error                  { return defaultManager().Update(ctx) }
+func Update(ctx context.Context, opts Options) error    { return defaultManager().Update(ctx, opts) }
 func Search(ctx context.Context, keyword string) error  { return defaultManager().Search(ctx, keyword) }
 
 // Install installs a plugin
 func (m *Manager) Install(ctx context.Context, arg string, opts Options) (Plugin, error) {
 	input := m.parseArg(ctx, arg)
-	input.name = m.tryIndex(ctx, input.name)
+	input.name = m.tryIndex(ctx, input.name, opts)
 
 	// If the plugin is already installed, it skips installing the plugin.
 	if p, installed := m.isInstalled(ctx, input.name, input.version); installed {
@@ -111,7 +111,7 @@ func (m *Manager) Install(ctx context.Context, arg string, opts Options) (Plugin
 }
 
 func (m *Manager) install(ctx context.Context, src string, opts Options) (Plugin, error) {
-	tempDir, err := downloader.DownloadToTempDir(ctx, src)
+	tempDir, err := downloader.DownloadToTempDir(ctx, src, opts.Insecure)
 	if err != nil {
 		return Plugin{}, xerrors.Errorf("download failed: %w", err)
 	}

pkg/plugin/plugin.go

@@ -57,6 +57,7 @@ type Options struct {
 	Args     []string
 	Stdin    io.Reader // For output plugin
 	Platform ftypes.Platform
+	Insecure bool
 }
 
 func (p *Plugin) Cmd(ctx context.Context, opts Options) (*exec.Cmd, error) {
@@ -154,7 +155,7 @@ func (p *Plugin) install(ctx context.Context, dst, pwd string, opts Options) err
 	p.Installed.Platform = lo.FromPtr(platform.Selector)
 
 	log.DebugContext(ctx, "Downloading the execution file...", log.String("uri", platform.URI))
-	if err = downloader.Download(ctx, platform.URI, dst, pwd); err != nil {
+	if err = downloader.Download(ctx, platform.URI, dst, pwd, opts.Insecure); err != nil {
 		return xerrors.Errorf("unable to download the execution file (%s): %w", platform.URI, err)
 	}
 	return nil