crowdsec/cmd/crowdsec-cli/decisions.go

633 lines
22 KiB
Go

package main
import (
"context"
"encoding/csv"
"encoding/json"
"fmt"
"net/url"
"os"
"path/filepath"
"strconv"
"strings"
"time"
"github.com/fatih/color"
"github.com/go-openapi/strfmt"
"github.com/jszwec/csvutil"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/crowdsecurity/crowdsec/pkg/apiclient"
"github.com/crowdsecurity/crowdsec/pkg/cwversion"
"github.com/crowdsecurity/crowdsec/pkg/models"
"github.com/crowdsecurity/crowdsec/pkg/types"
)
var Client *apiclient.ApiClient
func DecisionsToTable(alerts *models.GetAlertsResponse, printMachine bool) error {
/*here we cheat a bit : to make it more readable for the user, we dedup some entries*/
spamLimit := make(map[string]bool)
skipped := 0
for aIdx := 0; aIdx < len(*alerts); aIdx++ {
alertItem := (*alerts)[aIdx]
newDecisions := make([]*models.Decision, 0)
for _, decisionItem := range alertItem.Decisions {
spamKey := fmt.Sprintf("%t:%s:%s:%s", *decisionItem.Simulated, *decisionItem.Type, *decisionItem.Scope, *decisionItem.Value)
if _, ok := spamLimit[spamKey]; ok {
skipped++
continue
}
spamLimit[spamKey] = true
newDecisions = append(newDecisions, decisionItem)
}
alertItem.Decisions = newDecisions
}
if csConfig.Cscli.Output == "raw" {
csvwriter := csv.NewWriter(os.Stdout)
header := []string{"id", "source", "ip", "reason", "action", "country", "as", "events_count", "expiration", "simulated", "alert_id"}
if printMachine {
header = append(header, "machine")
}
err := csvwriter.Write(header)
if err != nil {
return err
}
for _, alertItem := range *alerts {
for _, decisionItem := range alertItem.Decisions {
raw := []string{
fmt.Sprintf("%d", decisionItem.ID),
*decisionItem.Origin,
*decisionItem.Scope + ":" + *decisionItem.Value,
*decisionItem.Scenario,
*decisionItem.Type,
alertItem.Source.Cn,
alertItem.Source.GetAsNumberName(),
fmt.Sprintf("%d", *alertItem.EventsCount),
*decisionItem.Duration,
fmt.Sprintf("%t", *decisionItem.Simulated),
fmt.Sprintf("%d", alertItem.ID),
}
if printMachine {
raw = append(raw, alertItem.MachineID)
}
err := csvwriter.Write(raw)
if err != nil {
return err
}
}
}
csvwriter.Flush()
} else if csConfig.Cscli.Output == "json" {
x, _ := json.MarshalIndent(alerts, "", " ")
fmt.Printf("%s", string(x))
} else if csConfig.Cscli.Output == "human" {
if len(*alerts) == 0 {
fmt.Println("No active decisions")
return nil
}
decisionsTable(color.Output, alerts, printMachine)
if skipped > 0 {
fmt.Printf("%d duplicated entries skipped\n", skipped)
}
}
return nil
}
func NewDecisionsCmd() *cobra.Command {
var cmdDecisions = &cobra.Command{
Use: "decisions [action]",
Short: "Manage decisions",
Long: `Add/List/Delete/Import decisions from LAPI`,
Example: `cscli decisions [action] [filter]`,
Aliases: []string{"decision"},
/*TBD example*/
Args: cobra.MinimumNArgs(1),
DisableAutoGenTag: true,
PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
if err := csConfig.LoadAPIClient(); err != nil {
return errors.Wrap(err, "loading api client")
}
password := strfmt.Password(csConfig.API.Client.Credentials.Password)
apiurl, err := url.Parse(csConfig.API.Client.Credentials.URL)
if err != nil {
return errors.Wrapf(err, "parsing api url %s", csConfig.API.Client.Credentials.URL)
}
Client, err = apiclient.NewClient(&apiclient.Config{
MachineID: csConfig.API.Client.Credentials.Login,
Password: password,
UserAgent: fmt.Sprintf("crowdsec/%s", cwversion.VersionStr()),
URL: apiurl,
VersionPrefix: "v1",
})
if err != nil {
return errors.Wrap(err, "creating api client")
}
return nil
},
}
cmdDecisions.AddCommand(NewDecisionsListCmd())
cmdDecisions.AddCommand(NewDecisionsAddCmd())
cmdDecisions.AddCommand(NewDecisionsDeleteCmd())
cmdDecisions.AddCommand(NewDecisionsImportCmd())
return cmdDecisions
}
func NewDecisionsListCmd() *cobra.Command {
var filter = apiclient.AlertsListOpts{
ValueEquals: new(string),
ScopeEquals: new(string),
ScenarioEquals: new(string),
OriginEquals: new(string),
IPEquals: new(string),
RangeEquals: new(string),
Since: new(string),
Until: new(string),
TypeEquals: new(string),
IncludeCAPI: new(bool),
Limit: new(int),
}
NoSimu := new(bool)
contained := new(bool)
var printMachine bool
var cmdDecisionsList = &cobra.Command{
Use: "list [options]",
Short: "List decisions from LAPI",
Example: `cscli decisions list -i 1.2.3.4
cscli decisions list -r 1.2.3.0/24
cscli decisions list -s crowdsecurity/ssh-bf
cscli decisions list -t ban
`,
Args: cobra.ExactArgs(0),
DisableAutoGenTag: true,
Run: func(cmd *cobra.Command, args []string) {
var err error
/*take care of shorthand options*/
if err := manageCliDecisionAlerts(filter.IPEquals, filter.RangeEquals, filter.ScopeEquals, filter.ValueEquals); err != nil {
log.Fatalf("%s", err)
}
filter.ActiveDecisionEquals = new(bool)
*filter.ActiveDecisionEquals = true
if NoSimu != nil && *NoSimu {
filter.IncludeSimulated = new(bool)
}
/* nullify the empty entries to avoid bad filter */
if *filter.Until == "" {
filter.Until = nil
} else if strings.HasSuffix(*filter.Until, "d") {
/*time.ParseDuration support hours 'h' as bigger unit, let's make the user's life easier*/
realDuration := strings.TrimSuffix(*filter.Until, "d")
days, err := strconv.Atoi(realDuration)
if err != nil {
printHelp(cmd)
log.Fatalf("Can't parse duration %s, valid durations format: 1d, 4h, 4h15m", *filter.Until)
}
*filter.Until = fmt.Sprintf("%d%s", days*24, "h")
}
if *filter.Since == "" {
filter.Since = nil
} else if strings.HasSuffix(*filter.Since, "d") {
/*time.ParseDuration support hours 'h' as bigger unit, let's make the user's life easier*/
realDuration := strings.TrimSuffix(*filter.Since, "d")
days, err := strconv.Atoi(realDuration)
if err != nil {
printHelp(cmd)
log.Fatalf("Can't parse duration %s, valid durations format: 1d, 4h, 4h15m", *filter.Until)
}
*filter.Since = fmt.Sprintf("%d%s", days*24, "h")
}
if *filter.IncludeCAPI {
*filter.Limit = 0
}
if *filter.TypeEquals == "" {
filter.TypeEquals = nil
}
if *filter.ValueEquals == "" {
filter.ValueEquals = nil
}
if *filter.ScopeEquals == "" {
filter.ScopeEquals = nil
}
if *filter.ScenarioEquals == "" {
filter.ScenarioEquals = nil
}
if *filter.IPEquals == "" {
filter.IPEquals = nil
}
if *filter.RangeEquals == "" {
filter.RangeEquals = nil
}
if *filter.OriginEquals == "" {
filter.OriginEquals = nil
}
if contained != nil && *contained {
filter.Contains = new(bool)
}
alerts, _, err := Client.Alerts.List(context.Background(), filter)
if err != nil {
log.Fatalf("Unable to list decisions : %v", err)
}
err = DecisionsToTable(alerts, printMachine)
if err != nil {
log.Fatalf("unable to list decisions : %v", err)
}
},
}
cmdDecisionsList.Flags().SortFlags = false
cmdDecisionsList.Flags().BoolVarP(filter.IncludeCAPI, "all", "a", false, "Include decisions from Central API")
cmdDecisionsList.Flags().StringVar(filter.Since, "since", "", "restrict to alerts newer than since (ie. 4h, 30d)")
cmdDecisionsList.Flags().StringVar(filter.Until, "until", "", "restrict to alerts older than until (ie. 4h, 30d)")
cmdDecisionsList.Flags().StringVarP(filter.TypeEquals, "type", "t", "", "restrict to this decision type (ie. ban,captcha)")
cmdDecisionsList.Flags().StringVar(filter.ScopeEquals, "scope", "", "restrict to this scope (ie. ip,range,session)")
cmdDecisionsList.Flags().StringVar(filter.OriginEquals, "origin", "", fmt.Sprintf("the value to match for the specified origin (%s ...)", strings.Join(types.GetOrigins(), ",")))
cmdDecisionsList.Flags().StringVarP(filter.ValueEquals, "value", "v", "", "restrict to this value (ie. 1.2.3.4,userName)")
cmdDecisionsList.Flags().StringVarP(filter.ScenarioEquals, "scenario", "s", "", "restrict to this scenario (ie. crowdsecurity/ssh-bf)")
cmdDecisionsList.Flags().StringVarP(filter.IPEquals, "ip", "i", "", "restrict to alerts from this source ip (shorthand for --scope ip --value <IP>)")
cmdDecisionsList.Flags().StringVarP(filter.RangeEquals, "range", "r", "", "restrict to alerts from this source range (shorthand for --scope range --value <RANGE>)")
cmdDecisionsList.Flags().IntVarP(filter.Limit, "limit", "l", 100, "number of alerts to get (use 0 to remove the limit)")
cmdDecisionsList.Flags().BoolVar(NoSimu, "no-simu", false, "exclude decisions in simulation mode")
cmdDecisionsList.Flags().BoolVarP(&printMachine, "machine", "m", false, "print machines that triggered decisions")
cmdDecisionsList.Flags().BoolVar(contained, "contained", false, "query decisions contained by range")
return cmdDecisionsList
}
func NewDecisionsAddCmd() *cobra.Command {
var (
addIP string
addRange string
addDuration string
addValue string
addScope string
addReason string
addType string
)
var cmdDecisionsAdd = &cobra.Command{
Use: "add [options]",
Short: "Add decision to LAPI",
Example: `cscli decisions add --ip 1.2.3.4
cscli decisions add --range 1.2.3.0/24
cscli decisions add --ip 1.2.3.4 --duration 24h --type captcha
cscli decisions add --scope username --value foobar
`,
/*TBD : fix long and example*/
Args: cobra.ExactArgs(0),
DisableAutoGenTag: true,
Run: func(cmd *cobra.Command, args []string) {
var err error
alerts := models.AddAlertsRequest{}
origin := types.CscliOrigin
capacity := int32(0)
leakSpeed := "0"
eventsCount := int32(1)
empty := ""
simulated := false
startAt := time.Now().UTC().Format(time.RFC3339)
stopAt := time.Now().UTC().Format(time.RFC3339)
createdAt := time.Now().UTC().Format(time.RFC3339)
/*take care of shorthand options*/
if err := manageCliDecisionAlerts(&addIP, &addRange, &addScope, &addValue); err != nil {
log.Fatalf("%s", err)
}
if addIP != "" {
addValue = addIP
addScope = types.Ip
} else if addRange != "" {
addValue = addRange
addScope = types.Range
} else if addValue == "" {
printHelp(cmd)
log.Fatalf("Missing arguments, a value is required (--ip, --range or --scope and --value)")
}
if addReason == "" {
addReason = fmt.Sprintf("manual '%s' from '%s'", addType, csConfig.API.Client.Credentials.Login)
}
decision := models.Decision{
Duration: &addDuration,
Scope: &addScope,
Value: &addValue,
Type: &addType,
Scenario: &addReason,
Origin: &origin,
}
alert := models.Alert{
Capacity: &capacity,
Decisions: []*models.Decision{&decision},
Events: []*models.Event{},
EventsCount: &eventsCount,
Leakspeed: &leakSpeed,
Message: &addReason,
ScenarioHash: &empty,
Scenario: &addReason,
ScenarioVersion: &empty,
Simulated: &simulated,
//setting empty scope/value broke plugins, and it didn't seem to be needed anymore w/ latest papi changes
Source: &models.Source{
AsName: empty,
AsNumber: empty,
Cn: empty,
IP: addValue,
Range: "",
Scope: &addScope,
Value: &addValue,
},
StartAt: &startAt,
StopAt: &stopAt,
CreatedAt: createdAt,
}
alerts = append(alerts, &alert)
_, _, err = Client.Alerts.Add(context.Background(), alerts)
if err != nil {
log.Fatal(err)
}
log.Info("Decision successfully added")
},
}
cmdDecisionsAdd.Flags().SortFlags = false
cmdDecisionsAdd.Flags().StringVarP(&addIP, "ip", "i", "", "Source ip (shorthand for --scope ip --value <IP>)")
cmdDecisionsAdd.Flags().StringVarP(&addRange, "range", "r", "", "Range source ip (shorthand for --scope range --value <RANGE>)")
cmdDecisionsAdd.Flags().StringVarP(&addDuration, "duration", "d", "4h", "Decision duration (ie. 1h,4h,30m)")
cmdDecisionsAdd.Flags().StringVarP(&addValue, "value", "v", "", "The value (ie. --scope username --value foobar)")
cmdDecisionsAdd.Flags().StringVar(&addScope, "scope", types.Ip, "Decision scope (ie. ip,range,username)")
cmdDecisionsAdd.Flags().StringVarP(&addReason, "reason", "R", "", "Decision reason (ie. scenario-name)")
cmdDecisionsAdd.Flags().StringVarP(&addType, "type", "t", "ban", "Decision type (ie. ban,captcha,throttle)")
return cmdDecisionsAdd
}
func NewDecisionsDeleteCmd() *cobra.Command {
var delFilter = apiclient.DecisionsDeleteOpts{
ScopeEquals: new(string),
ValueEquals: new(string),
TypeEquals: new(string),
IPEquals: new(string),
RangeEquals: new(string),
ScenarioEquals: new(string),
OriginEquals: new(string),
}
var delDecisionId string
var delDecisionAll bool
contained := new(bool)
var cmdDecisionsDelete = &cobra.Command{
Use: "delete [options]",
Short: "Delete decisions",
DisableAutoGenTag: true,
Aliases: []string{"remove"},
Example: `cscli decisions delete -r 1.2.3.0/24
cscli decisions delete -i 1.2.3.4
cscli decisions delete --id 42
cscli decisions delete --type captcha
`,
/*TBD : refaire le Long/Example*/
PreRun: func(cmd *cobra.Command, args []string) {
if delDecisionAll {
return
}
if *delFilter.ScopeEquals == "" && *delFilter.ValueEquals == "" &&
*delFilter.TypeEquals == "" && *delFilter.IPEquals == "" &&
*delFilter.RangeEquals == "" && *delFilter.ScenarioEquals == "" &&
*delFilter.OriginEquals == "" && delDecisionId == "" {
cmd.Usage()
log.Fatalln("At least one filter or --all must be specified")
}
},
Run: func(cmd *cobra.Command, args []string) {
var err error
var decisions *models.DeleteDecisionResponse
/*take care of shorthand options*/
if err := manageCliDecisionAlerts(delFilter.IPEquals, delFilter.RangeEquals, delFilter.ScopeEquals, delFilter.ValueEquals); err != nil {
log.Fatalf("%s", err)
}
if *delFilter.ScopeEquals == "" {
delFilter.ScopeEquals = nil
}
if *delFilter.OriginEquals == "" {
delFilter.OriginEquals = nil
}
if *delFilter.ValueEquals == "" {
delFilter.ValueEquals = nil
}
if *delFilter.ScenarioEquals == "" {
delFilter.ScenarioEquals = nil
}
if *delFilter.TypeEquals == "" {
delFilter.TypeEquals = nil
}
if *delFilter.IPEquals == "" {
delFilter.IPEquals = nil
}
if *delFilter.RangeEquals == "" {
delFilter.RangeEquals = nil
}
if contained != nil && *contained {
delFilter.Contains = new(bool)
}
if delDecisionId == "" {
decisions, _, err = Client.Decisions.Delete(context.Background(), delFilter)
if err != nil {
log.Fatalf("Unable to delete decisions : %v", err)
}
} else {
if _, err = strconv.Atoi(delDecisionId); err != nil {
log.Fatalf("id '%s' is not an integer: %v", delDecisionId, err)
}
decisions, _, err = Client.Decisions.DeleteOne(context.Background(), delDecisionId)
if err != nil {
log.Fatalf("Unable to delete decision : %v", err)
}
}
log.Infof("%s decision(s) deleted", decisions.NbDeleted)
},
}
cmdDecisionsDelete.Flags().SortFlags = false
cmdDecisionsDelete.Flags().StringVarP(delFilter.IPEquals, "ip", "i", "", "Source ip (shorthand for --scope ip --value <IP>)")
cmdDecisionsDelete.Flags().StringVarP(delFilter.RangeEquals, "range", "r", "", "Range source ip (shorthand for --scope range --value <RANGE>)")
cmdDecisionsDelete.Flags().StringVarP(delFilter.TypeEquals, "type", "t", "", "the decision type (ie. ban,captcha)")
cmdDecisionsDelete.Flags().StringVarP(delFilter.ValueEquals, "value", "v", "", "the value to match for in the specified scope")
cmdDecisionsDelete.Flags().StringVarP(delFilter.ScenarioEquals, "scenario", "s", "", "the scenario name (ie. crowdsecurity/ssh-bf)")
cmdDecisionsDelete.Flags().StringVar(delFilter.OriginEquals, "origin", "", fmt.Sprintf("the value to match for the specified origin (%s ...)", strings.Join(types.GetOrigins(), ",")))
cmdDecisionsDelete.Flags().StringVar(&delDecisionId, "id", "", "decision id")
cmdDecisionsDelete.Flags().BoolVar(&delDecisionAll, "all", false, "delete all decisions")
cmdDecisionsDelete.Flags().BoolVar(contained, "contained", false, "query decisions contained by range")
return cmdDecisionsDelete
}
func NewDecisionsImportCmd() *cobra.Command {
var (
defaultDuration = "4h"
defaultScope = "ip"
defaultType = "ban"
defaultReason = "manual"
importDuration string
importScope string
importReason string
importType string
importFile string
)
var cmdDecisionImport = &cobra.Command{
Use: "import [options]",
Short: "Import decisions from json or csv file",
Long: "expected format :\n" +
"csv : any of duration,origin,reason,scope,type,value, with a header line\n" +
`json : {"duration" : "24h", "origin" : "my-list", "reason" : "my_scenario", "scope" : "ip", "type" : "ban", "value" : "x.y.z.z"}`,
DisableAutoGenTag: true,
Example: `decisions.csv :
duration,scope,value
24h,ip,1.2.3.4
cscsli decisions import -i decisions.csv
decisions.json :
[{"duration" : "4h", "scope" : "ip", "type" : "ban", "value" : "1.2.3.4"}]
`,
Run: func(cmd *cobra.Command, args []string) {
if importFile == "" {
log.Fatalf("Please provide a input file containing decisions with -i flag")
}
csvData, err := os.ReadFile(importFile)
if err != nil {
log.Fatalf("unable to open '%s': %s", importFile, err)
}
type decisionRaw struct {
Duration string `csv:"duration,omitempty" json:"duration,omitempty"`
Origin string `csv:"origin,omitempty" json:"origin,omitempty"`
Scenario string `csv:"reason,omitempty" json:"reason,omitempty"`
Scope string `csv:"scope,omitempty" json:"scope,omitempty"`
Type string `csv:"type,omitempty" json:"type,omitempty"`
Value string `csv:"value" json:"value"`
}
var decisionsListRaw []decisionRaw
switch fileFormat := filepath.Ext(importFile); fileFormat {
case ".json":
if err := json.Unmarshal(csvData, &decisionsListRaw); err != nil {
log.Fatalf("unable to unmarshall json: '%s'", err)
}
case ".csv":
if err := csvutil.Unmarshal(csvData, &decisionsListRaw); err != nil {
log.Fatalf("unable to unmarshall csv: '%s'", err)
}
default:
log.Fatalf("file format not supported for '%s'. supported format are 'json' and 'csv'", importFile)
}
decisionsList := make([]*models.Decision, 0)
for i, decisionLine := range decisionsListRaw {
line := i + 2
if decisionLine.Value == "" {
log.Fatalf("please provide a 'value' in your csv line %d", line)
}
/*deal with defaults and cli-override*/
if decisionLine.Duration == "" {
decisionLine.Duration = defaultDuration
log.Debugf("No 'duration' line %d, using default value: '%s'", line, defaultDuration)
}
if importDuration != "" {
decisionLine.Duration = importDuration
log.Debugf("'duration' line %d, using supplied value: '%s'", line, importDuration)
}
decisionLine.Origin = types.CscliImportOrigin
if decisionLine.Scenario == "" {
decisionLine.Scenario = defaultReason
log.Debugf("No 'reason' line %d, using value: '%s'", line, decisionLine.Scenario)
}
if importReason != "" {
decisionLine.Scenario = importReason
log.Debugf("No 'reason' line %d, using supplied value: '%s'", line, importReason)
}
if decisionLine.Type == "" {
decisionLine.Type = defaultType
log.Debugf("No 'type' line %d, using default value: '%s'", line, decisionLine.Type)
}
if importType != "" {
decisionLine.Type = importType
log.Debugf("'type' line %d, using supplied value: '%s'", line, importType)
}
if decisionLine.Scope == "" {
decisionLine.Scope = defaultScope
log.Debugf("No 'scope' line %d, using default value: '%s'", line, decisionLine.Scope)
}
if importScope != "" {
decisionLine.Scope = importScope
log.Debugf("'scope' line %d, using supplied value: '%s'", line, importScope)
}
decision := models.Decision{
Value: types.StrPtr(decisionLine.Value),
Duration: types.StrPtr(decisionLine.Duration),
Origin: types.StrPtr(decisionLine.Origin),
Scenario: types.StrPtr(decisionLine.Scenario),
Type: types.StrPtr(decisionLine.Type),
Scope: types.StrPtr(decisionLine.Scope),
Simulated: new(bool),
}
decisionsList = append(decisionsList, &decision)
}
alerts := models.AddAlertsRequest{}
importAlert := models.Alert{
CreatedAt: time.Now().UTC().Format(time.RFC3339),
Scenario: types.StrPtr(fmt.Sprintf("import %s : %d IPs", importFile, len(decisionsList))),
Message: types.StrPtr(""),
Events: []*models.Event{},
Source: &models.Source{
Scope: types.StrPtr(""),
Value: types.StrPtr(""),
},
StartAt: types.StrPtr(time.Now().UTC().Format(time.RFC3339)),
StopAt: types.StrPtr(time.Now().UTC().Format(time.RFC3339)),
Capacity: types.Int32Ptr(0),
Simulated: types.BoolPtr(false),
EventsCount: types.Int32Ptr(int32(len(decisionsList))),
Leakspeed: types.StrPtr(""),
ScenarioHash: types.StrPtr(""),
ScenarioVersion: types.StrPtr(""),
Decisions: decisionsList,
}
alerts = append(alerts, &importAlert)
if len(decisionsList) > 1000 {
log.Infof("You are about to add %d decisions, this may take a while", len(decisionsList))
}
_, _, err = Client.Alerts.Add(context.Background(), alerts)
if err != nil {
log.Fatal(err)
}
log.Infof("%d decisions successfully imported", len(decisionsList))
},
}
cmdDecisionImport.Flags().SortFlags = false
cmdDecisionImport.Flags().StringVarP(&importFile, "input", "i", "", "Input file")
cmdDecisionImport.Flags().StringVarP(&importDuration, "duration", "d", "", "Decision duration (ie. 1h,4h,30m)")
cmdDecisionImport.Flags().StringVar(&importScope, "scope", types.Ip, "Decision scope (ie. ip,range,username)")
cmdDecisionImport.Flags().StringVarP(&importReason, "reason", "R", "", "Decision reason (ie. scenario-name)")
cmdDecisionImport.Flags().StringVarP(&importType, "type", "t", "", "Decision type (ie. ban,captcha,throttle)")
return cmdDecisionImport
}