func main() {
var (
conf client.Configuration
cli client.Client
err error
op mig.Operation
a mig.Action
migrc, show, render, target, expiration, afile string
verbose bool
modargs []string
run interface{}
)
defer func() {
if e := recover(); e != nil {
fmt.Fprintf(os.Stderr, "%v\n", e)
}
}()
homedir := client.FindHomedir()
fs := flag.NewFlagSet("mig flag", flag.ContinueOnError)
fs.Usage = continueOnFlagError
fs.StringVar(&migrc, "c", homedir+"/.migrc", "alternative configuration file")
fs.StringVar(&show, "show", "found", "type of results to show")
fs.StringVar(&render, "render", "text", "results rendering mode")
fs.StringVar(&target, "t", fmt.Sprintf("status='%s' AND mode='daemon'", mig.AgtStatusOnline), "action target")
fs.StringVar(&expiration, "e", "300s", "expiration")
fs.StringVar(&afile, "i", "/path/to/file", "Load action from file")
fs.BoolVar(&verbose, "v", false, "Enable verbose output")
// if first argument is missing, or is help, print help
// otherwise, pass the remainder of the arguments to the module for parsing
// this client is agnostic to module parameters
if len(os.Args) < 2 || os.Args[1] == "help" || os.Args[1] == "-h" || os.Args[1] == "--help" {
usage()
}
if len(os.Args) < 2 || os.Args[1] == "-V" {
fmt.Println(version)
os.Exit(0)
}
// when reading the action from a file, go directly to launch
if os.Args[1] == "-i" {
err = fs.Parse(os.Args[1:])
if err != nil {
panic(err)
}
if afile == "/path/to/file" {
panic("-i flag must take an action file path as argument")
}
a, err = mig.ActionFromFile(afile)
if err != nil {
panic(err)
}
fmt.Fprintf(os.Stderr, "[info] launching action from file, all flags are ignored\n")
goto readytolaunch
}
// arguments parsing works as follow:
// * os.Args[1] must contain the name of the module to launch. we first verify
// that a module exist for this name and then continue parsing
// * os.Args[2:] contains both global options and module parameters. We parse the
// whole []string to extract global options, and module parameters will be left
// unparsed in fs.Args()
// * fs.Args() with the module parameters is passed as a string to the module parser
// which will return a module operation to store in the action
op.Module = os.Args[1]
if _, ok := modules.Available[op.Module]; !ok {
panic("Unknown module " + op.Module)
}
// -- Ugly hack Warning --
// Parse() will fail on the first flag that is not defined, but in our case module flags
// are defined in the module packages and not in this program. Therefore, the flag parse error
// is expected. Unfortunately, Parse() writes directly to stderr and displays the error to
// the user, which confuses them. The right fix would be to prevent Parse() from writing to
// stderr, since that's really the job of the calling program, but in the meantime we work around
// it by redirecting stderr to null before calling Parse(), and put it back to normal afterward.
// for ref, issue is at https://github.com/golang/go/blob/master/src/flag/flag.go#L793
fs.SetOutput(os.NewFile(uintptr(87592), os.DevNull))
err = fs.Parse(os.Args[2:])
fs.SetOutput(nil)
if err != nil {
// ignore the flag not defined error, which is expected because
// module parameters are defined in modules and not in main
if len(err.Error()) > 30 && err.Error()[0:29] == "flag provided but not defined" {
// requeue the parameter that failed
modargs = append(modargs, err.Error()[31:])
} else {
// if it's another error, panic
panic(err)
}
}
for _, arg := range fs.Args() {
modargs = append(modargs, arg)
}
run = modules.Available[op.Module].NewRun()
if _, ok := run.(modules.HasParamsParser); !ok {
fmt.Fprintf(os.Stderr, "[error] module '%s' does not support command line invocation\n", op.Module)
os.Exit(2)
}
op.Parameters, err = run.(modules.HasParamsParser).ParamsParser(modargs)
if err != nil || op.Parameters == nil {
panic(err)
}
// If running against the local target, don't post the action to the MIG API
// but run it locally instead.
if target == "local" {
msg, err := modules.MakeMessage(modules.MsgClassParameters, op.Parameters)
if err != nil {
panic(err)
}
out := run.(modules.Runner).Run(bytes.NewBuffer(msg))
if len(out) == 0 {
panic("got empty results, run failed")
}
if _, ok := run.(modules.HasResultsPrinter); ok {
var modres modules.Result
err := json.Unmarshal([]byte(out), &modres)
if err != nil {
panic(err)
}
outRes, err := run.(modules.HasResultsPrinter).PrintResults(modres, true)
if err != nil {
panic(err)
}
for _, resLine := range outRes {
fmt.Println(resLine)
}
} else {
out = fmt.Sprintf("%s\n", out)
}
os.Exit(0)
}
a.Operations = append(a.Operations, op)
for _, arg := range os.Args[1:] {
a.Name += arg + " "
}
a.Target = target
readytolaunch:
// instanciate an API client
conf, err = client.ReadConfiguration(migrc)
if err != nil {
panic(err)
}
cli, err = client.NewClient(conf, "cmd-"+version)
if err != nil {
panic(err)
}
if verbose {
cli.EnableDebug()
}
// set the validity 60 second in the past to deal with clock skew
a.ValidFrom = time.Now().Add(-60 * time.Second).UTC()
period, err := time.ParseDuration(expiration)
if err != nil {
panic(err)
}
a.ExpireAfter = a.ValidFrom.Add(period)
// add extra 60 seconds taken for clock skew
a.ExpireAfter = a.ExpireAfter.Add(60 * time.Second).UTC()
asig, err := cli.SignAction(a)
if err != nil {
panic(err)
}
a = asig
// evaluate target before launch, give a change to cancel before going out to agents
agents, err := cli.EvaluateAgentTarget(a.Target)
if err != nil {
panic(err)
}
fmt.Fprintf(os.Stderr, "\x1b[33m%d agents will be targeted. ctrl+c to cancel. launching in \x1b[0m", len(agents))
for i := 5; i > 0; i-- {
time.Sleep(1 * time.Second)
fmt.Fprintf(os.Stderr, "\x1b[33m%d\x1b[0m ", i)
}
fmt.Fprintf(os.Stderr, "\x1b[33mGO\n\x1b[0m")
// launch and follow
a, err = cli.PostAction(a)
if err != nil {
panic(err)
}
c := make(chan os.Signal, 1)
done := make(chan bool, 1)
signal.Notify(c, os.Interrupt)
go func() {
err = cli.FollowAction(a)
if err != nil {
panic(err)
}
done <- true
}()
select {
case <-c:
fmt.Fprintf(os.Stderr, "stop following action. agents may still be running. printing available results:\n")
goto printresults
case <-done:
goto printresults
}
printresults:
err = cli.PrintActionResults(a, show, render)
if err != nil {
panic(err)
}
}
// actionReader retrieves an action from the API using its numerical ID
// and enters prompt mode to analyze it
func actionReader(input string, cli client.Client) (err error) {
defer func() {
if e := recover(); e != nil {
err = fmt.Errorf("actionReader() -> %v", e)
}
}()
inputArr := strings.Split(input, " ")
if len(inputArr) < 2 {
panic("wrong order format. must be 'action <actionid>'")
}
aid, err := strconv.ParseFloat(inputArr[1], 64)
if err != nil {
panic(err)
}
a, _, err := cli.GetAction(aid)
if err != nil {
panic(err)
}
investigators := investigatorsStringFromAction(a.Investigators, 80)
fmt.Println("Entering action reader mode. Type \x1b[32;1mexit\x1b[0m or press \x1b[32;1mctrl+d\x1b[0m to leave. \x1b[32;1mhelp\x1b[0m may help.")
fmt.Printf("Action: '%s'.\nLaunched by '%s' on '%s'.\nStatus '%s'.\n",
a.Name, investigators, a.StartTime, a.Status)
a.PrintCounters()
prompt := fmt.Sprintf("\x1b[31;1maction %d>\x1b[0m ", uint64(aid)%1000)
for {
// completion
var symbols = []string{"command", "copy", "counters", "details", "exit", "grep", "help", "investigators",
"json", "list", "all", "found", "notfound", "pretty", "r", "results", "times"}
readline.Completer = func(query, ctx string) []string {
var res []string
for _, sym := range symbols {
if strings.HasPrefix(sym, query) {
res = append(res, sym)
}
}
return res
}
input, err := readline.String(prompt)
if err == io.EOF {
break
}
if err != nil {
fmt.Println("error: ", err)
break
}
orders := strings.Split(strings.TrimSpace(input), " ")
switch orders[0] {
case "command":
err = commandReader(input, cli)
if err != nil {
panic(err)
}
case "copy":
err = actionLauncher(a, cli)
if err != nil {
panic(err)
}
goto exit
case "counters":
a, _, err = cli.GetAction(aid)
if err != nil {
panic(err)
}
a.PrintCounters()
case "details":
actionPrintDetails(a)
case "exit":
fmt.Printf("exit\n")
goto exit
case "help":
fmt.Printf(`The following orders are available:
command <id> jump to command reader mode for command <id>
copy enter action launcher mode using current action as template
counters display the counters of the action
details display the details of the action, including status & times
exit exit this mode (also works with ctrl+d)
help show this help
investigators print the list of investigators that signed the action
json show the json of the action
list <show> returns the list of commands with their status
<show>: * set to "all" to get all results (default)
* set to "found" to only display positive results
* set to "notfound" for negative results
list can be followed by a 'filter' pipe:
ex: ls | grep server1.(dom1|dom2) | grep -v example.net
r refresh the action (get latest version from upstream)
results <show> <render> display results of all commands
<show>: * set to "all" to get all results (default)
* set to "found" to only display positive results
* set to "notfound" for negative results
<render>: * set to "text" to print results in console (default)
* set to "map" to generate an open a google map
times show the various timestamps of the action
`)
case "investigators":
for _, i := range a.Investigators {
fmt.Println(i.Name, "- Key ID:", i.PGPFingerprint)
}
case "json":
tmpAction, err := getActionView(a)
if err != nil {
panic(err)
}
var ajson []byte
ajson, err = json.MarshalIndent(tmpAction, "", " ")
if err != nil {
panic(err)
}
fmt.Printf("%s\n", ajson)
case "list":
err = actionPrintList(aid, orders, cli)
if err != nil {
panic(err)
}
case "r":
a, _, err = cli.GetAction(aid)
if err != nil {
panic(err)
}
fmt.Println("reloaded")
case "results":
show := "all"
if len(orders) > 1 {
switch orders[1] {
case "all", "found", "notfound":
show = orders[1]
default:
panic("invalid show '" + orders[2] + "'")
}
}
render := "text"
if len(orders) > 2 {
switch orders[2] {
case "map", "text":
render = orders[2]
default:
panic("invalid rendering '" + orders[2] + "'")
}
}
err = cli.PrintActionResults(a, show, render)
if err != nil {
panic(err)
}
case "times":
fmt.Printf("Valid from '%s' until '%s'\nStarted on '%s'\n"+
"Last updated '%s'\nFinished on '%s'\n",
a.ValidFrom, a.ExpireAfter, a.StartTime, a.LastUpdateTime, a.FinishTime)
case "":
break
default:
fmt.Printf("Unknown order '%s'. You are in action reader mode. Try `help`.\n", orders[0])
}
readline.AddHistory(input)
}
exit:
fmt.Printf("\n")
return
}