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gobuster/cli/cmd/dns.go
Christian Mehlmauer b90dd32291
Dev (#362)
2022-10-29 16:34:51 +02:00

108 lines
3.1 KiB
Go

package cmd
import (
"errors"
"fmt"
"log"
"runtime"
"time"
"github.com/OJ/gobuster/v3/cli"
"github.com/OJ/gobuster/v3/gobusterdns"
"github.com/OJ/gobuster/v3/libgobuster"
"github.com/spf13/cobra"
)
// nolint:gochecknoglobals
var cmdDNS *cobra.Command
func runDNS(cmd *cobra.Command, args []string) error {
globalopts, pluginopts, err := parseDNSOptions()
if err != nil {
return fmt.Errorf("error on parsing arguments: %w", err)
}
plugin, err := gobusterdns.NewGobusterDNS(globalopts, pluginopts)
if err != nil {
return fmt.Errorf("error on creating gobusterdns: %w", err)
}
if err := cli.Gobuster(mainContext, globalopts, plugin); err != nil {
var wErr *gobusterdns.ErrWildcard
if errors.As(err, &wErr) {
return fmt.Errorf("%w. To force processing of Wildcard DNS, specify the '--wildcard' switch", wErr)
}
return fmt.Errorf("error on running gobuster: %w", err)
}
return nil
}
func parseDNSOptions() (*libgobuster.Options, *gobusterdns.OptionsDNS, error) {
globalopts, err := parseGlobalOptions()
if err != nil {
return nil, nil, err
}
pluginOpts := gobusterdns.NewOptionsDNS()
pluginOpts.Domain, err = cmdDNS.Flags().GetString("domain")
if err != nil {
return nil, nil, fmt.Errorf("invalid value for domain: %w", err)
}
pluginOpts.ShowIPs, err = cmdDNS.Flags().GetBool("show-ips")
if err != nil {
return nil, nil, fmt.Errorf("invalid value for show-ips: %w", err)
}
pluginOpts.ShowCNAME, err = cmdDNS.Flags().GetBool("show-cname")
if err != nil {
return nil, nil, fmt.Errorf("invalid value for show-cname: %w", err)
}
pluginOpts.WildcardForced, err = cmdDNS.Flags().GetBool("wildcard")
if err != nil {
return nil, nil, fmt.Errorf("invalid value for wildcard: %w", err)
}
pluginOpts.Timeout, err = cmdDNS.Flags().GetDuration("timeout")
if err != nil {
return nil, nil, fmt.Errorf("invalid value for timeout: %w", err)
}
pluginOpts.Resolver, err = cmdDNS.Flags().GetString("resolver")
if err != nil {
return nil, nil, fmt.Errorf("invalid value for resolver: %w", err)
}
if pluginOpts.Resolver != "" && runtime.GOOS == "windows" {
return nil, nil, fmt.Errorf("currently can not set custom dns resolver on windows. See https://golang.org/pkg/net/#hdr-Name_Resolution")
}
return globalopts, pluginOpts, nil
}
// nolint:gochecknoinits
func init() {
cmdDNS = &cobra.Command{
Use: "dns",
Short: "Uses DNS subdomain enumeration mode",
RunE: runDNS,
}
cmdDNS.Flags().StringP("domain", "d", "", "The target domain")
cmdDNS.Flags().BoolP("show-ips", "i", false, "Show IP addresses")
cmdDNS.Flags().BoolP("show-cname", "c", false, "Show CNAME records (cannot be used with '-i' option)")
cmdDNS.Flags().DurationP("timeout", "", time.Second, "DNS resolver timeout")
cmdDNS.Flags().BoolP("wildcard", "", false, "Force continued operation when wildcard found")
cmdDNS.Flags().StringP("resolver", "r", "", "Use custom DNS server (format server.com or server.com:port)")
if err := cmdDNS.MarkFlagRequired("domain"); err != nil {
log.Fatalf("error on marking flag as required: %v", err)
}
cmdDNS.PersistentPreRun = func(cmd *cobra.Command, args []string) {
configureGlobalOptions()
}
rootCmd.AddCommand(cmdDNS)
}