333 lines
11 KiB
Go
333 lines
11 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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"io/fs"
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"net/url"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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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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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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"gopkg.in/tomb.v2"
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"github.com/crowdsecurity/crowdsec/pkg/apiclient"
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"github.com/crowdsecurity/crowdsec/pkg/csconfig"
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"github.com/crowdsecurity/crowdsec/pkg/csplugin"
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"github.com/crowdsecurity/crowdsec/pkg/csprofiles"
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"github.com/crowdsecurity/crowdsec/pkg/cwversion"
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)
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type NotificationsCfg struct {
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Config csplugin.PluginConfig `json:"plugin_config"`
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Profiles []*csconfig.ProfileCfg `json:"associated_profiles"`
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ids []uint
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}
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func NewNotificationsCmd() *cobra.Command {
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var cmdNotifications = &cobra.Command{
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Use: "notifications [action]",
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Short: "Helper for notification plugin configuration",
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Long: "To list/inspect/test notification template",
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Args: cobra.MinimumNArgs(1),
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Aliases: []string{"notifications", "notification"},
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DisableAutoGenTag: true,
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PersistentPreRun: func(cmd *cobra.Command, args []string) {
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var (
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err error
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)
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if err = csConfig.API.Server.LoadProfiles(); err != nil {
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log.Fatal(err)
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}
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if csConfig.ConfigPaths.NotificationDir == "" {
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log.Fatalf("config_paths.notification_dir is not set in crowdsec config")
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}
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},
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}
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var cmdNotificationsList = &cobra.Command{
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Use: "list",
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Short: "List active notifications plugins",
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Long: `List active notifications plugins`,
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Example: `cscli notifications list`,
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Args: cobra.ExactArgs(0),
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DisableAutoGenTag: true,
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RunE: func(cmd *cobra.Command, arg []string) error {
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ncfgs, err := getNotificationsConfiguration()
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if err != nil {
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return errors.Wrap(err, "Can't build profiles configuration")
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}
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if csConfig.Cscli.Output == "human" {
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notificationListTable(color.Output, ncfgs)
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} else if csConfig.Cscli.Output == "json" {
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x, err := json.MarshalIndent(ncfgs, "", " ")
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if err != nil {
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return errors.New("failed to marshal notification configuration")
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}
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fmt.Printf("%s", string(x))
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} else if csConfig.Cscli.Output == "raw" {
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csvwriter := csv.NewWriter(os.Stdout)
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err := csvwriter.Write([]string{"Name", "Type", "Profile name"})
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if err != nil {
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return errors.Wrap(err, "failed to write raw header")
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}
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for _, b := range ncfgs {
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profilesList := []string{}
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for _, p := range b.Profiles {
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profilesList = append(profilesList, p.Name)
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}
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err := csvwriter.Write([]string{b.Config.Name, b.Config.Type, strings.Join(profilesList, ", ")})
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if err != nil {
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return errors.Wrap(err, "failed to write raw content")
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}
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}
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csvwriter.Flush()
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}
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return nil
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},
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}
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cmdNotifications.AddCommand(cmdNotificationsList)
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var cmdNotificationsInspect = &cobra.Command{
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Use: "inspect",
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Short: "Inspect active notifications plugin configuration",
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Long: `Inspect active notifications plugin and show configuration`,
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Example: `cscli notifications inspect <plugin_name>`,
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Args: cobra.ExactArgs(1),
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DisableAutoGenTag: true,
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RunE: func(cmd *cobra.Command, arg []string) error {
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var (
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cfg NotificationsCfg
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ok bool
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)
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pluginName := arg[0]
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if pluginName == "" {
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errors.New("Please provide a plugin name to inspect")
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}
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ncfgs, err := getNotificationsConfiguration()
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if err != nil {
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return errors.Wrap(err, "Can't build profiles configuration")
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}
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if cfg, ok = ncfgs[pluginName]; !ok {
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return errors.New("The provided plugin name doesn't exist or isn't active")
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}
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if csConfig.Cscli.Output == "human" || csConfig.Cscli.Output == "raw" {
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fmt.Printf(" - %15s: %15s\n", "Type", cfg.Config.Type)
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fmt.Printf(" - %15s: %15s\n", "Name", cfg.Config.Name)
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fmt.Printf(" - %15s: %15s\n", "Timeout", cfg.Config.TimeOut)
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fmt.Printf(" - %15s: %15s\n", "Format", cfg.Config.Format)
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for k, v := range cfg.Config.Config {
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fmt.Printf(" - %15s: %15v\n", k, v)
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}
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} else if csConfig.Cscli.Output == "json" {
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x, err := json.MarshalIndent(cfg, "", " ")
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if err != nil {
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return errors.New("failed to marshal notification configuration")
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}
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fmt.Printf("%s", string(x))
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}
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return nil
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},
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}
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cmdNotifications.AddCommand(cmdNotificationsInspect)
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var remediation bool
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var alertOverride string
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var cmdNotificationsReinject = &cobra.Command{
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Use: "reinject",
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Short: "reinject alert into notifications system",
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Long: `Reinject alert into notifications system`,
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Example: `
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cscli notifications reinject <alert_id>
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cscli notifications reinject <alert_id> --remediation
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cscli notifications reinject <alert_id> -a '{"remediation": true,"scenario":"notification/test"}'
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`,
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Args: cobra.ExactArgs(1),
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DisableAutoGenTag: true,
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RunE: func(cmd *cobra.Command, args []string) error {
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var (
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pluginBroker csplugin.PluginBroker
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pluginTomb tomb.Tomb
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)
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if len(args) != 1 {
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printHelp(cmd)
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return errors.New("Wrong number of argument: there should be one argument")
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}
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//first: get the alert
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id, err := strconv.Atoi(args[0])
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if err != nil {
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return errors.New(fmt.Sprintf("bad alert id %s", args[0]))
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}
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if err := csConfig.LoadAPIClient(); err != nil {
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return errors.Wrapf(err, "loading api client")
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}
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if csConfig.API.Client == nil {
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return errors.New("There is no configuration on 'api_client:'")
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}
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if csConfig.API.Client.Credentials == nil {
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return errors.New(fmt.Sprintf("Please provide credentials for the API in '%s'", csConfig.API.Client.CredentialsFilePath))
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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 errors.Wrapf(err, "error parsing the URL of the API")
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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", cwversion.VersionStr()),
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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 errors.Wrapf(err, "error creating the client for the API")
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}
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alert, _, err := client.Alerts.GetByID(context.Background(), id)
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if err != nil {
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return errors.Wrapf(err, fmt.Sprintf("can't find alert with id %s", args[0]))
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}
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if alertOverride != "" {
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if err = json.Unmarshal([]byte(alertOverride), alert); err != nil {
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return errors.Wrapf(err, "Can't unmarshal the data given in the alert flag")
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}
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}
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if !remediation {
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alert.Remediation = true
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}
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// second we start plugins
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err = pluginBroker.Init(csConfig.PluginConfig, csConfig.API.Server.Profiles, csConfig.ConfigPaths)
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if err != nil {
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return errors.Wrapf(err, "Can't initialize plugins")
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}
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pluginTomb.Go(func() error {
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pluginBroker.Run(&pluginTomb)
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return nil
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})
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//third: get the profile(s), and process the whole stuff
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profiles, err := csprofiles.NewProfile(csConfig.API.Server.Profiles)
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if err != nil {
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return errors.Wrap(err, "Cannot extract profiles from configuration")
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}
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for id, profile := range profiles {
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_, matched, err := profile.EvaluateProfile(alert)
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if err != nil {
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return errors.Wrapf(err, "can't evaluate profile %s", profile.Cfg.Name)
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}
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if !matched {
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log.Infof("The profile %s didn't match", profile.Cfg.Name)
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continue
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}
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log.Infof("The profile %s matched, sending to its configured notification plugins", profile.Cfg.Name)
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loop:
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for {
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select {
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case pluginBroker.PluginChannel <- csplugin.ProfileAlert{
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ProfileID: uint(id),
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Alert: alert,
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}:
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break loop
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default:
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time.Sleep(50 * time.Millisecond)
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log.Info("sleeping\n")
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}
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}
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if profile.Cfg.OnSuccess == "break" {
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log.Infof("The profile %s contains a 'on_success: break' so bailing out", profile.Cfg.Name)
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break
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}
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}
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// time.Sleep(2 * time.Second) // There's no mechanism to ensure notification has been sent
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pluginTomb.Kill(errors.New("terminating"))
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pluginTomb.Wait()
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return nil
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},
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}
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cmdNotificationsReinject.Flags().BoolVarP(&remediation, "remediation", "r", false, "Set Alert.Remediation to false in the reinjected alert (see your profile filter configuration)")
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cmdNotificationsReinject.Flags().StringVarP(&alertOverride, "alert", "a", "", "JSON string used to override alert fields in the reinjected alert (see crowdsec/pkg/models/alert.go in the source tree for the full definition of the object)")
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cmdNotifications.AddCommand(cmdNotificationsReinject)
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return cmdNotifications
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}
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func getNotificationsConfiguration() (map[string]NotificationsCfg, error) {
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pcfgs := map[string]csplugin.PluginConfig{}
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wf := func(path string, info fs.FileInfo, err error) error {
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if info == nil {
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return errors.Wrapf(err, "error while traversing directory %s", path)
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}
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name := filepath.Join(csConfig.ConfigPaths.NotificationDir, info.Name()) //Avoid calling info.Name() twice
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if (strings.HasSuffix(name, "yaml") || strings.HasSuffix(name, "yml")) && !(info.IsDir()) {
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ts, err := csplugin.ParsePluginConfigFile(name)
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if err != nil {
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return errors.Wrapf(err, "Loading notifification plugin configuration with %s", name)
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}
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for _, t := range ts {
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pcfgs[t.Name] = t
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}
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}
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return nil
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}
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if err := filepath.Walk(csConfig.ConfigPaths.NotificationDir, wf); err != nil {
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return nil, errors.Wrap(err, "Loading notifification plugin configuration")
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}
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// A bit of a tricky stuf now: reconcile profiles and notification plugins
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ncfgs := map[string]NotificationsCfg{}
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profiles, err := csprofiles.NewProfile(csConfig.API.Server.Profiles)
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if err != nil {
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return nil, errors.Wrap(err, "Cannot extract profiles from configuration")
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}
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for profileID, profile := range profiles {
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loop:
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for _, notif := range profile.Cfg.Notifications {
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for name, pc := range pcfgs {
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if notif == name {
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if _, ok := ncfgs[pc.Name]; !ok {
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ncfgs[pc.Name] = NotificationsCfg{
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Config: pc,
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Profiles: []*csconfig.ProfileCfg{profile.Cfg},
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ids: []uint{uint(profileID)},
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}
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continue loop
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}
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tmp := ncfgs[pc.Name]
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for _, pr := range tmp.Profiles {
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var profiles []*csconfig.ProfileCfg
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if pr.Name == profile.Cfg.Name {
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continue
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}
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profiles = append(tmp.Profiles, profile.Cfg)
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ids := append(tmp.ids, uint(profileID))
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ncfgs[pc.Name] = NotificationsCfg{
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Config: tmp.Config,
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Profiles: profiles,
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ids: ids,
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}
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}
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}
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}
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}
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}
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return ncfgs, nil
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}
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