Merge pull request #813 from projectdiscovery/validate-templates

Added validate flag to validate templates

v2/cmd/nuclei/main.go

@@ -24,7 +24,9 @@ func main() {
 	if err != nil {
 		gologger.Fatal().Msgf("Could not create runner: %s\n", err)
 	}
-	nucleiRunner.RunEnumeration()
+	if err := nucleiRunner.RunEnumeration(); err != nil {
+		gologger.Fatal().Msgf("Could not run nuclei: %s\n", err)
+	}
 	nucleiRunner.Close()
 }
 
@@ -96,6 +98,7 @@ based on templates offering massive extensibility and ease of use.`)
 	set.IntVar(&options.InteractionsPollDuration, "interactions-poll-duration", 5, "Number of seconds before each interaction poll request")
 	set.IntVar(&options.InteractionsColldownPeriod, "interactions-cooldown-period", 5, "Extra time for interaction polling before exiting")
 	set.BoolVar(&options.VerboseVerbose, "vv", false, "Display Extra Verbose Information")
+	set.BoolVar(&options.Validate, "validate", false, "Validate the passed templates to nuclei")
 	_ = set.Parse()
 
 	if cfgFile != "" {

v2/internal/runner/runner.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/logrusorgru/aurora"
+	"github.com/pkg/errors"
 	"github.com/projectdiscovery/gologger"
 	"github.com/projectdiscovery/hmap/store/hybrid"
 	"github.com/projectdiscovery/nuclei/v2/internal/colorizer"
@@ -74,13 +75,13 @@ func New(options *types.Options) (*Runner, error) {
 	if options.ReportingConfig != "" {
 		file, err := os.Open(options.ReportingConfig)
 		if err != nil {
-			gologger.Fatal().Msgf("Could not open reporting config file: %s\n", err)
+			return nil, errors.Wrap(err, "could not open reporting config file")
 		}
 
 		reportingOptions = &reporting.Options{}
 		if parseErr := yaml.NewDecoder(file).Decode(reportingOptions); parseErr != nil {
 			file.Close()
-			gologger.Fatal().Msgf("Could not parse reporting config file: %s\n", parseErr)
+			return nil, errors.Wrap(parseErr, "could not parse reporting config file")
 		}
 		file.Close()
 	}
@@ -101,11 +102,11 @@ func New(options *types.Options) (*Runner, error) {
 		}
 	}
 	if reportingOptions != nil {
-		if client, err := reporting.New(reportingOptions, options.ReportingDB); err != nil {
+		client, err := reporting.New(reportingOptions, options.ReportingDB)
-			gologger.Fatal().Msgf("Could not create issue reporting client: %s\n", err)
+		if err != nil {
-		} else {
+			return nil, errors.Wrap(err, "could not create issue reporting client")
-			runner.issuesClient = client
 		}
+		runner.issuesClient = client
 	}
 
 	// output coloring
@@ -121,11 +122,11 @@ func New(options *types.Options) (*Runner, error) {
 	if (len(options.Templates) == 0 || !options.NewTemplates || (options.Targets == "" && !options.Stdin && options.Target == "")) && options.UpdateTemplates {
 		os.Exit(0)
 	}
-	if hm, err := hybrid.New(hybrid.DefaultDiskOptions); err != nil {
+	hm, err := hybrid.New(hybrid.DefaultDiskOptions)
-		gologger.Fatal().Msgf("Could not create temporary input file: %s\n", err)
+	if err != nil {
-	} else {
+		return nil, errors.Wrap(err, "could not create temporary input file")
-		runner.hostMap = hm
 	}
+	runner.hostMap = hm
 
 	runner.inputCount = 0
 	dupeCount := 0
@@ -157,9 +158,9 @@ func New(options *types.Options) (*Runner, error) {
 
 	// Handle taget file
 	if options.Targets != "" {
-		input, err := os.Open(options.Targets)
+		input, inputErr := os.Open(options.Targets)
-		if err != nil {
+		if inputErr != nil {
-			gologger.Fatal().Msgf("Could not open targets file '%s': %s\n", options.Targets, err)
+			return nil, errors.Wrap(inputErr, "could not open targets file")
 		}
 		scanner := bufio.NewScanner(input)
 		for scanner.Scan() {
@@ -185,7 +186,7 @@ func New(options *types.Options) (*Runner, error) {
 	// Create the output file if asked
 	outputWriter, err := output.NewStandardWriter(!options.NoColor, options.NoMeta, options.JSON, options.Output, options.TraceLogFile)
 	if err != nil {
-		gologger.Fatal().Msgf("Could not create output file '%s': %s\n", options.Output, err)
+		return nil, errors.Wrap(err, "could not create output file")
 	}
 	runner.output = outputWriter
 
@@ -245,14 +246,14 @@ func (r *Runner) Close() {
 
 // RunEnumeration sets up the input layer for giving input nuclei.
 // binary and runs the actual enumeration
-func (r *Runner) RunEnumeration() {
+func (r *Runner) RunEnumeration() error {
 	defer r.Close()
 
 	// If user asked for new templates to be executed, collect the list from template directory.
 	if r.options.NewTemplates {
 		templatesLoaded, err := r.readNewTemplatesFile()
 		if err != nil {
-			gologger.Warning().Msgf("Could not get newly added templates: %s\n", err)
+			return errors.Wrap(err, "could not get newly added templates")
 		}
 		r.options.Templates = append(r.options.Templates, templatesLoaded...)
 	}
@@ -287,7 +288,14 @@ func (r *Runner) RunEnumeration() {
 	}
 	store, err := loader.New(&loaderConfig)
 	if err != nil {
-		gologger.Fatal().Msgf("Could not load templates from config: %s\n", err)
+		return errors.Wrap(err, "could not load templates from config")
+	}
+	if r.options.Validate {
+		if !store.ValidateTemplates(r.options.Templates, r.options.Workflows) {
+			return errors.New("an error occurred during templates validation")
+		}
+		gologger.Info().Msgf("All templates validated successfully\n")
+		return nil // exit
 	}
 	store.Load()
 
@@ -405,7 +413,7 @@ func (r *Runner) RunEnumeration() {
 
 	// 0 matches means no templates were found in directory
 	if templateCount == 0 {
-		gologger.Fatal().Msgf("Error, no templates were found.\n")
+		return errors.New("no templates were found")
 	}
 
 	results := &atomic.Bool{}
@@ -445,6 +453,7 @@ func (r *Runner) RunEnumeration() {
 	if r.browser != nil {
 		r.browser.Close()
 	}
+	return nil
 }
 
 // readNewTemplatesFile reads newly added templates from directory if it exists

v2/pkg/catalog/loader/loader.go

@@ -1,6 +1,8 @@
 package loader
 
 import (
+	"strings"
+
 	"github.com/projectdiscovery/gologger"
 	"github.com/projectdiscovery/nuclei/v2/pkg/catalog"
 	"github.com/projectdiscovery/nuclei/v2/pkg/catalog/loader/filter"
@@ -81,6 +83,67 @@ func (s *Store) Load() {
 	s.workflows = s.LoadWorkflows(s.config.Workflows)
 }
 
+// ValidateTemplates takes a list of templates and validates them
+// erroring out on discovering any faulty templates.
+func (s *Store) ValidateTemplates(templatesList, workflowsList []string) bool {
+	includedTemplates := s.config.Catalog.GetTemplatesPath(templatesList)
+	includedWorkflows := s.config.Catalog.GetTemplatesPath(workflowsList)
+	templatesMap := s.pathFilter.Match(includedTemplates)
+	workflowsMap := s.pathFilter.Match(includedWorkflows)
+
+	notErrored := true
+	for k := range templatesMap {
+		_, err := s.loadTemplate(k, false)
+		if err != nil {
+			if strings.Contains(err.Error(), "cannot create template executer") {
+				continue
+			}
+			if err == filter.ErrExcluded {
+				continue
+			}
+			notErrored = false
+			gologger.Error().Msgf("Error occurred loading template %s: %s\n", k, err)
+			continue
+		}
+		_, err = templates.Parse(k, s.config.ExecutorOptions)
+		if err != nil {
+			if strings.Contains(err.Error(), "cannot create template executer") {
+				continue
+			}
+			if err == filter.ErrExcluded {
+				continue
+			}
+			notErrored = false
+			gologger.Error().Msgf("Error occurred parsing template %s: %s\n", k, err)
+		}
+	}
+	for k := range workflowsMap {
+		_, err := s.loadTemplate(k, true)
+		if err != nil {
+			if strings.Contains(err.Error(), "cannot create template executer") {
+				continue
+			}
+			if err == filter.ErrExcluded {
+				continue
+			}
+			notErrored = false
+			gologger.Error().Msgf("Error occurred loading workflow %s: %s\n", k, err)
+		}
+		_, err = templates.Parse(k, s.config.ExecutorOptions)
+		if err != nil {
+			if strings.Contains(err.Error(), "cannot create template executer") {
+				continue
+			}
+			if err == filter.ErrExcluded {
+				continue
+			}
+			notErrored = false
+			gologger.Error().Msgf("Error occurred parsing workflow %s: %s\n", k, err)
+		}
+	}
+	return notErrored
+}
+
 // LoadTemplates takes a list of templates and returns paths for them
 func (s *Store) LoadTemplates(templatesList []string) []*templates.Template {
 	includedTemplates := s.config.Catalog.GetTemplatesPath(templatesList)

v2/pkg/progress/progress.go

@@ -167,7 +167,7 @@ func printCallback(stats clistats.StatisticsClient) {
 	builder.WriteRune(')')
 	builder.WriteRune('\n')
 
-	gologger.Print().Msgf("%s", builder.String())
+	fmt.Printf("%s", builder.String())
 }
 
 // getMetrics returns a map of important metrics for client

v2/pkg/types/types.go

@@ -104,6 +104,8 @@ type Options struct {
 	Silent bool
 	// Version specifies if we should just show version and exit
 	Version bool
+	// Validate validates the templates passed to nuclei.
+	Validate bool
 	// Verbose flag indicates whether to show verbose output or not
 	Verbose        bool
 	VerboseVerbose bool