561 lines
18 KiB
Go
561 lines
18 KiB
Go
package main
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import (
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"context"
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"encoding/csv"
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"encoding/json"
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"fmt"
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"net/url"
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"os"
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"sort"
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"strconv"
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"strings"
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"text/template"
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"time"
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"github.com/fatih/color"
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"github.com/go-openapi/strfmt"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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"gopkg.in/yaml.v2"
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"github.com/crowdsecurity/go-cs-lib/version"
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"github.com/crowdsecurity/crowdsec/pkg/apiclient"
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"github.com/crowdsecurity/crowdsec/pkg/database"
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"github.com/crowdsecurity/crowdsec/pkg/models"
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"github.com/crowdsecurity/crowdsec/pkg/types"
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"github.com/crowdsecurity/crowdsec/cmd/crowdsec-cli/require"
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)
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func DecisionsFromAlert(alert *models.Alert) string {
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ret := ""
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var decMap = make(map[string]int)
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for _, decision := range alert.Decisions {
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k := *decision.Type
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if *decision.Simulated {
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k = fmt.Sprintf("(simul)%s", k)
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}
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v := decMap[k]
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decMap[k] = v + 1
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}
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for k, v := range decMap {
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if len(ret) > 0 {
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ret += " "
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}
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ret += fmt.Sprintf("%s:%d", k, v)
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}
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return ret
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}
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func DateFromAlert(alert *models.Alert) string {
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ts, err := time.Parse(time.RFC3339, alert.CreatedAt)
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if err != nil {
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log.Infof("while parsing %s with %s : %s", alert.CreatedAt, time.RFC3339, err)
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return alert.CreatedAt
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}
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return ts.Format(time.RFC822)
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}
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func SourceFromAlert(alert *models.Alert) string {
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//more than one item, just number and scope
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if len(alert.Decisions) > 1 {
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return fmt.Sprintf("%d %ss (%s)", len(alert.Decisions), *alert.Decisions[0].Scope, *alert.Decisions[0].Origin)
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}
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//fallback on single decision information
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if len(alert.Decisions) == 1 {
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return fmt.Sprintf("%s:%s", *alert.Decisions[0].Scope, *alert.Decisions[0].Value)
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}
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//try to compose a human friendly version
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if *alert.Source.Value != "" && *alert.Source.Scope != "" {
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scope := ""
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scope = fmt.Sprintf("%s:%s", *alert.Source.Scope, *alert.Source.Value)
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extra := ""
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if alert.Source.Cn != "" {
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extra = alert.Source.Cn
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}
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if alert.Source.AsNumber != "" {
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extra += fmt.Sprintf("/%s", alert.Source.AsNumber)
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}
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if alert.Source.AsName != "" {
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extra += fmt.Sprintf("/%s", alert.Source.AsName)
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}
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if extra != "" {
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scope += " (" + extra + ")"
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}
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return scope
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}
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return ""
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}
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func AlertsToTable(alerts *models.GetAlertsResponse, printMachine bool) error {
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if csConfig.Cscli.Output == "raw" {
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csvwriter := csv.NewWriter(os.Stdout)
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header := []string{"id", "scope", "value", "reason", "country", "as", "decisions", "created_at"}
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if printMachine {
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header = append(header, "machine")
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}
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err := csvwriter.Write(header)
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if err != nil {
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return err
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}
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for _, alertItem := range *alerts {
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row := []string{
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fmt.Sprintf("%d", alertItem.ID),
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*alertItem.Source.Scope,
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*alertItem.Source.Value,
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*alertItem.Scenario,
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alertItem.Source.Cn,
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alertItem.Source.GetAsNumberName(),
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DecisionsFromAlert(alertItem),
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*alertItem.StartAt,
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}
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if printMachine {
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row = append(row, alertItem.MachineID)
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}
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err := csvwriter.Write(row)
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if err != nil {
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return err
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}
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}
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csvwriter.Flush()
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} else if csConfig.Cscli.Output == "json" {
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if *alerts == nil {
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// avoid returning "null" in json
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// could be cleaner if we used slice of alerts directly
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fmt.Println("[]")
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return nil
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}
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x, _ := json.MarshalIndent(alerts, "", " ")
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fmt.Printf("%s", string(x))
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} else if csConfig.Cscli.Output == "human" {
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if len(*alerts) == 0 {
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fmt.Println("No active alerts")
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return nil
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}
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alertsTable(color.Output, alerts, printMachine)
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}
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return nil
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}
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var alertTemplate = `
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################################################################################################
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- ID : {{.ID}}
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- Date : {{.CreatedAt}}
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- Machine : {{.MachineID}}
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- Simulation : {{.Simulated}}
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- Reason : {{.Scenario}}
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- Events Count : {{.EventsCount}}
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- Scope:Value : {{.Source.Scope}}{{if .Source.Value}}:{{.Source.Value}}{{end}}
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- Country : {{.Source.Cn}}
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- AS : {{.Source.AsName}}
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- Begin : {{.StartAt}}
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- End : {{.StopAt}}
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- UUID : {{.UUID}}
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`
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func DisplayOneAlert(alert *models.Alert, withDetail bool) error {
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if csConfig.Cscli.Output == "human" {
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tmpl, err := template.New("alert").Parse(alertTemplate)
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if err != nil {
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return err
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}
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err = tmpl.Execute(os.Stdout, alert)
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if err != nil {
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return err
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}
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alertDecisionsTable(color.Output, alert)
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if len(alert.Meta) > 0 {
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fmt.Printf("\n - Context :\n")
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sort.Slice(alert.Meta, func(i, j int) bool {
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return alert.Meta[i].Key < alert.Meta[j].Key
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})
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table := newTable(color.Output)
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table.SetRowLines(false)
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table.SetHeaders("Key", "Value")
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for _, meta := range alert.Meta {
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var valSlice []string
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if err := json.Unmarshal([]byte(meta.Value), &valSlice); err != nil {
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return fmt.Errorf("unknown context value type '%s' : %s", meta.Value, err)
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}
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for _, value := range valSlice {
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table.AddRow(
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meta.Key,
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value,
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)
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}
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}
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table.Render()
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}
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if withDetail {
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fmt.Printf("\n - Events :\n")
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for _, event := range alert.Events {
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alertEventTable(color.Output, event)
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}
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}
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}
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return nil
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}
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func NewAlertsCmd() *cobra.Command {
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var cmdAlerts = &cobra.Command{
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Use: "alerts [action]",
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Short: "Manage alerts",
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Args: cobra.MinimumNArgs(1),
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DisableAutoGenTag: true,
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Aliases: []string{"alert"},
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PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
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var err error
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if err := csConfig.LoadAPIClient(); err != nil {
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return fmt.Errorf("loading api client: %w", err)
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}
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apiURL, err := url.Parse(csConfig.API.Client.Credentials.URL)
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if err != nil {
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return fmt.Errorf("parsing api url %s: %w", apiURL, err)
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}
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Client, err = apiclient.NewClient(&apiclient.Config{
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MachineID: csConfig.API.Client.Credentials.Login,
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Password: strfmt.Password(csConfig.API.Client.Credentials.Password),
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UserAgent: fmt.Sprintf("crowdsec/%s", version.String()),
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URL: apiURL,
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VersionPrefix: "v1",
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})
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if err != nil {
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return fmt.Errorf("new api client: %w", err)
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}
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return nil
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},
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}
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cmdAlerts.AddCommand(NewAlertsListCmd())
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cmdAlerts.AddCommand(NewAlertsInspectCmd())
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cmdAlerts.AddCommand(NewAlertsFlushCmd())
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cmdAlerts.AddCommand(NewAlertsDeleteCmd())
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return cmdAlerts
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}
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func NewAlertsListCmd() *cobra.Command {
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var alertListFilter = apiclient.AlertsListOpts{
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ScopeEquals: new(string),
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ValueEquals: new(string),
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ScenarioEquals: new(string),
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IPEquals: new(string),
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RangeEquals: new(string),
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Since: new(string),
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Until: new(string),
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TypeEquals: new(string),
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IncludeCAPI: new(bool),
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OriginEquals: new(string),
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}
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var limit = new(int)
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contained := new(bool)
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var printMachine bool
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var cmdAlertsList = &cobra.Command{
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Use: "list [filters]",
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Short: "List alerts",
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Example: `cscli alerts list
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cscli alerts list --ip 1.2.3.4
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cscli alerts list --range 1.2.3.0/24
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cscli alerts list -s crowdsecurity/ssh-bf
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cscli alerts list --type ban`,
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DisableAutoGenTag: true,
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RunE: func(cmd *cobra.Command, args []string) error {
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var err error
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if err := manageCliDecisionAlerts(alertListFilter.IPEquals, alertListFilter.RangeEquals,
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alertListFilter.ScopeEquals, alertListFilter.ValueEquals); err != nil {
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printHelp(cmd)
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return err
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}
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if limit != nil {
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alertListFilter.Limit = limit
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}
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if *alertListFilter.Until == "" {
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alertListFilter.Until = nil
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} else if strings.HasSuffix(*alertListFilter.Until, "d") {
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/*time.ParseDuration support hours 'h' as bigger unit, let's make the user's life easier*/
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realDuration := strings.TrimSuffix(*alertListFilter.Until, "d")
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days, err := strconv.Atoi(realDuration)
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if err != nil {
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printHelp(cmd)
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return fmt.Errorf("can't parse duration %s, valid durations format: 1d, 4h, 4h15m", *alertListFilter.Until)
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}
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*alertListFilter.Until = fmt.Sprintf("%d%s", days*24, "h")
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}
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if *alertListFilter.Since == "" {
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alertListFilter.Since = nil
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} else if strings.HasSuffix(*alertListFilter.Since, "d") {
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/*time.ParseDuration support hours 'h' as bigger unit, let's make the user's life easier*/
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realDuration := strings.TrimSuffix(*alertListFilter.Since, "d")
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days, err := strconv.Atoi(realDuration)
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if err != nil {
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printHelp(cmd)
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return fmt.Errorf("can't parse duration %s, valid durations format: 1d, 4h, 4h15m", *alertListFilter.Since)
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}
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*alertListFilter.Since = fmt.Sprintf("%d%s", days*24, "h")
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}
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if *alertListFilter.IncludeCAPI {
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*alertListFilter.Limit = 0
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}
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if *alertListFilter.TypeEquals == "" {
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alertListFilter.TypeEquals = nil
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}
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if *alertListFilter.ScopeEquals == "" {
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alertListFilter.ScopeEquals = nil
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}
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if *alertListFilter.ValueEquals == "" {
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alertListFilter.ValueEquals = nil
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}
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if *alertListFilter.ScenarioEquals == "" {
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alertListFilter.ScenarioEquals = nil
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}
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if *alertListFilter.IPEquals == "" {
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alertListFilter.IPEquals = nil
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}
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if *alertListFilter.RangeEquals == "" {
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alertListFilter.RangeEquals = nil
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}
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if *alertListFilter.OriginEquals == "" {
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alertListFilter.OriginEquals = nil
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}
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if contained != nil && *contained {
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alertListFilter.Contains = new(bool)
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}
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alerts, _, err := Client.Alerts.List(context.Background(), alertListFilter)
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if err != nil {
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return fmt.Errorf("unable to list alerts: %v", err)
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}
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err = AlertsToTable(alerts, printMachine)
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if err != nil {
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return fmt.Errorf("unable to list alerts: %v", err)
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}
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return nil
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},
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}
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cmdAlertsList.Flags().SortFlags = false
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cmdAlertsList.Flags().BoolVarP(alertListFilter.IncludeCAPI, "all", "a", false, "Include decisions from Central API")
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cmdAlertsList.Flags().StringVar(alertListFilter.Until, "until", "", "restrict to alerts older than until (ie. 4h, 30d)")
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cmdAlertsList.Flags().StringVar(alertListFilter.Since, "since", "", "restrict to alerts newer than since (ie. 4h, 30d)")
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cmdAlertsList.Flags().StringVarP(alertListFilter.IPEquals, "ip", "i", "", "restrict to alerts from this source ip (shorthand for --scope ip --value <IP>)")
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cmdAlertsList.Flags().StringVarP(alertListFilter.ScenarioEquals, "scenario", "s", "", "the scenario (ie. crowdsecurity/ssh-bf)")
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cmdAlertsList.Flags().StringVarP(alertListFilter.RangeEquals, "range", "r", "", "restrict to alerts from this range (shorthand for --scope range --value <RANGE/X>)")
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cmdAlertsList.Flags().StringVar(alertListFilter.TypeEquals, "type", "", "restrict to alerts with given decision type (ie. ban, captcha)")
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cmdAlertsList.Flags().StringVar(alertListFilter.ScopeEquals, "scope", "", "restrict to alerts of this scope (ie. ip,range)")
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cmdAlertsList.Flags().StringVarP(alertListFilter.ValueEquals, "value", "v", "", "the value to match for in the specified scope")
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cmdAlertsList.Flags().StringVar(alertListFilter.OriginEquals, "origin", "", fmt.Sprintf("the value to match for the specified origin (%s ...)", strings.Join(types.GetOrigins(), ",")))
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cmdAlertsList.Flags().BoolVar(contained, "contained", false, "query decisions contained by range")
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cmdAlertsList.Flags().BoolVarP(&printMachine, "machine", "m", false, "print machines that sent alerts")
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cmdAlertsList.Flags().IntVarP(limit, "limit", "l", 50, "limit size of alerts list table (0 to view all alerts)")
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return cmdAlertsList
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}
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func NewAlertsDeleteCmd() *cobra.Command {
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var ActiveDecision *bool
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var AlertDeleteAll bool
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var delAlertByID string
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contained := new(bool)
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var alertDeleteFilter = apiclient.AlertsDeleteOpts{
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ScopeEquals: new(string),
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ValueEquals: new(string),
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ScenarioEquals: new(string),
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IPEquals: new(string),
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RangeEquals: new(string),
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}
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var cmdAlertsDelete = &cobra.Command{
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Use: "delete [filters] [--all]",
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Short: `Delete alerts
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/!\ This command can be use only on the same machine than the local API.`,
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Example: `cscli alerts delete --ip 1.2.3.4
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cscli alerts delete --range 1.2.3.0/24
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cscli alerts delete -s crowdsecurity/ssh-bf"`,
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DisableAutoGenTag: true,
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Aliases: []string{"remove"},
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Args: cobra.ExactArgs(0),
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PreRunE: func(cmd *cobra.Command, args []string) error {
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if AlertDeleteAll {
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return nil
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}
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if *alertDeleteFilter.ScopeEquals == "" && *alertDeleteFilter.ValueEquals == "" &&
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*alertDeleteFilter.ScenarioEquals == "" && *alertDeleteFilter.IPEquals == "" &&
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*alertDeleteFilter.RangeEquals == "" && delAlertByID == "" {
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_ = cmd.Usage()
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return fmt.Errorf("at least one filter or --all must be specified")
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}
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return nil
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},
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RunE: func(cmd *cobra.Command, args []string) error {
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var err error
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if !AlertDeleteAll {
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if err := manageCliDecisionAlerts(alertDeleteFilter.IPEquals, alertDeleteFilter.RangeEquals,
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alertDeleteFilter.ScopeEquals, alertDeleteFilter.ValueEquals); err != nil {
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printHelp(cmd)
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return err
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}
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if ActiveDecision != nil {
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alertDeleteFilter.ActiveDecisionEquals = ActiveDecision
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}
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if *alertDeleteFilter.ScopeEquals == "" {
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alertDeleteFilter.ScopeEquals = nil
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}
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if *alertDeleteFilter.ValueEquals == "" {
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alertDeleteFilter.ValueEquals = nil
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}
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if *alertDeleteFilter.ScenarioEquals == "" {
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alertDeleteFilter.ScenarioEquals = nil
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}
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if *alertDeleteFilter.IPEquals == "" {
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alertDeleteFilter.IPEquals = nil
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}
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if *alertDeleteFilter.RangeEquals == "" {
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alertDeleteFilter.RangeEquals = nil
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}
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if contained != nil && *contained {
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alertDeleteFilter.Contains = new(bool)
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}
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limit := 0
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alertDeleteFilter.Limit = &limit
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} else {
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limit := 0
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alertDeleteFilter = apiclient.AlertsDeleteOpts{Limit: &limit}
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}
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var alerts *models.DeleteAlertsResponse
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if delAlertByID == "" {
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alerts, _, err = Client.Alerts.Delete(context.Background(), alertDeleteFilter)
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if err != nil {
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return fmt.Errorf("unable to delete alerts : %v", err)
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}
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} else {
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alerts, _, err = Client.Alerts.DeleteOne(context.Background(), delAlertByID)
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if err != nil {
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return fmt.Errorf("unable to delete alert: %v", err)
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}
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}
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log.Infof("%s alert(s) deleted", alerts.NbDeleted)
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return nil
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},
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}
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cmdAlertsDelete.Flags().SortFlags = false
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cmdAlertsDelete.Flags().StringVar(alertDeleteFilter.ScopeEquals, "scope", "", "the scope (ie. ip,range)")
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cmdAlertsDelete.Flags().StringVarP(alertDeleteFilter.ValueEquals, "value", "v", "", "the value to match for in the specified scope")
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cmdAlertsDelete.Flags().StringVarP(alertDeleteFilter.ScenarioEquals, "scenario", "s", "", "the scenario (ie. crowdsecurity/ssh-bf)")
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cmdAlertsDelete.Flags().StringVarP(alertDeleteFilter.IPEquals, "ip", "i", "", "Source ip (shorthand for --scope ip --value <IP>)")
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cmdAlertsDelete.Flags().StringVarP(alertDeleteFilter.RangeEquals, "range", "r", "", "Range source ip (shorthand for --scope range --value <RANGE>)")
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cmdAlertsDelete.Flags().StringVar(&delAlertByID, "id", "", "alert ID")
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cmdAlertsDelete.Flags().BoolVarP(&AlertDeleteAll, "all", "a", false, "delete all alerts")
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cmdAlertsDelete.Flags().BoolVar(contained, "contained", false, "query decisions contained by range")
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return cmdAlertsDelete
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}
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func NewAlertsInspectCmd() *cobra.Command {
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var details bool
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var cmdAlertsInspect = &cobra.Command{
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Use: `inspect "alert_id"`,
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Short: `Show info about an alert`,
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Example: `cscli alerts inspect 123`,
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DisableAutoGenTag: true,
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RunE: func(cmd *cobra.Command, args []string) error {
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if len(args) == 0 {
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printHelp(cmd)
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return fmt.Errorf("missing alert_id")
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}
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for _, alertID := range args {
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|
id, err := strconv.Atoi(alertID)
|
|
if err != nil {
|
|
return fmt.Errorf("bad alert id %s", alertID)
|
|
}
|
|
alert, _, err := Client.Alerts.GetByID(context.Background(), id)
|
|
if err != nil {
|
|
return fmt.Errorf("can't find alert with id %s: %s", alertID, err)
|
|
}
|
|
switch csConfig.Cscli.Output {
|
|
case "human":
|
|
if err := DisplayOneAlert(alert, details); err != nil {
|
|
continue
|
|
}
|
|
case "json":
|
|
data, err := json.MarshalIndent(alert, "", " ")
|
|
if err != nil {
|
|
return fmt.Errorf("unable to marshal alert with id %s: %s", alertID, err)
|
|
}
|
|
fmt.Printf("%s\n", string(data))
|
|
case "raw":
|
|
data, err := yaml.Marshal(alert)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to marshal alert with id %s: %s", alertID, err)
|
|
}
|
|
fmt.Printf("%s\n", string(data))
|
|
}
|
|
}
|
|
|
|
return nil
|
|
},
|
|
}
|
|
cmdAlertsInspect.Flags().SortFlags = false
|
|
cmdAlertsInspect.Flags().BoolVarP(&details, "details", "d", false, "show alerts with events")
|
|
|
|
return cmdAlertsInspect
|
|
}
|
|
|
|
func NewAlertsFlushCmd() *cobra.Command {
|
|
var maxItems int
|
|
var maxAge string
|
|
var cmdAlertsFlush = &cobra.Command{
|
|
Use: `flush`,
|
|
Short: `Flush alerts
|
|
/!\ This command can be used only on the same machine than the local API`,
|
|
Example: `cscli alerts flush --max-items 1000 --max-age 7d`,
|
|
DisableAutoGenTag: true,
|
|
RunE: func(cmd *cobra.Command, args []string) error {
|
|
var err error
|
|
if err := require.LAPI(csConfig); err != nil {
|
|
return err
|
|
}
|
|
dbClient, err = database.NewClient(csConfig.DbConfig)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to create new database client: %s", err)
|
|
}
|
|
log.Info("Flushing alerts. !! This may take a long time !!")
|
|
err = dbClient.FlushAlerts(maxAge, maxItems)
|
|
if err != nil {
|
|
return fmt.Errorf("unable to flush alerts: %s", err)
|
|
}
|
|
log.Info("Alerts flushed")
|
|
|
|
return nil
|
|
},
|
|
}
|
|
|
|
cmdAlertsFlush.Flags().SortFlags = false
|
|
cmdAlertsFlush.Flags().IntVar(&maxItems, "max-items", 5000, "Maximum number of alert items to keep in the database")
|
|
cmdAlertsFlush.Flags().StringVar(&maxAge, "max-age", "7d", "Maximum age of alert items to keep in the database")
|
|
|
|
return cmdAlertsFlush
|
|
}
|