128 lines
3.2 KiB
Go
128 lines
3.2 KiB
Go
package main
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import (
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"context"
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"crypto/tls"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"os"
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"strings"
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"github.com/hashicorp/go-hclog"
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plugin "github.com/hashicorp/go-plugin"
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"gopkg.in/yaml.v3"
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"github.com/crowdsecurity/crowdsec/pkg/protobufs"
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)
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var logger hclog.Logger = hclog.New(&hclog.LoggerOptions{
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Name: "splunk-plugin",
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Level: hclog.LevelFromString("INFO"),
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Output: os.Stderr,
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JSONFormat: true,
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})
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type PluginConfig struct {
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Name string `yaml:"name"`
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URL string `yaml:"url"`
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Token string `yaml:"token"`
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LogLevel *string `yaml:"log_level"`
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}
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type Splunk struct {
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PluginConfigByName map[string]PluginConfig
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Client http.Client
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}
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type Payload struct {
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Event string `json:"event"`
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}
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func (s *Splunk) Notify(ctx context.Context, notification *protobufs.Notification) (*protobufs.Empty, error) {
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if _, ok := s.PluginConfigByName[notification.Name]; !ok {
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return &protobufs.Empty{}, fmt.Errorf("splunk invalid config name %s", notification.Name)
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}
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cfg := s.PluginConfigByName[notification.Name]
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if cfg.LogLevel != nil && *cfg.LogLevel != "" {
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logger.SetLevel(hclog.LevelFromString(*cfg.LogLevel))
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}
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logger.Info(fmt.Sprintf("received notify signal for %s config", notification.Name))
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p := Payload{Event: notification.Text}
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data, err := json.Marshal(p)
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if err != nil {
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return &protobufs.Empty{}, err
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}
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req, err := http.NewRequest(http.MethodPost, cfg.URL, strings.NewReader(string(data)))
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if err != nil {
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return &protobufs.Empty{}, err
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}
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req.Header.Add("Authorization", fmt.Sprintf("Splunk %s", cfg.Token))
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logger.Debug(fmt.Sprintf("posting event %s to %s", string(data), req.URL))
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resp, err := s.Client.Do(req.WithContext(ctx))
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if err != nil {
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return &protobufs.Empty{}, err
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}
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if resp.StatusCode != http.StatusOK {
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content, err := io.ReadAll(resp.Body)
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if err != nil {
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return &protobufs.Empty{}, fmt.Errorf("got non 200 response and failed to read error %w", err)
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}
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return &protobufs.Empty{}, fmt.Errorf("got non 200 response %s", string(content))
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}
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respData, err := io.ReadAll(resp.Body)
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if err != nil {
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return &protobufs.Empty{}, fmt.Errorf("failed to read response body got error %w", err)
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}
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logger.Debug(fmt.Sprintf("got response %s", string(respData)))
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return &protobufs.Empty{}, nil
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}
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func (s *Splunk) Configure(ctx context.Context, config *protobufs.Config) (*protobufs.Empty, error) {
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d := PluginConfig{}
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err := yaml.Unmarshal(config.Config, &d)
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s.PluginConfigByName[d.Name] = d
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logger.Debug(fmt.Sprintf("Splunk plugin '%s' use URL '%s'", d.Name, d.URL))
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return &protobufs.Empty{}, err
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}
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func main() {
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handshake := plugin.HandshakeConfig{
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ProtocolVersion: 1,
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MagicCookieKey: "CROWDSEC_PLUGIN_KEY",
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MagicCookieValue: os.Getenv("CROWDSEC_PLUGIN_KEY"),
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}
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tr := &http.Transport{
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TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
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}
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client := &http.Client{Transport: tr}
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sp := &Splunk{PluginConfigByName: make(map[string]PluginConfig), Client: *client}
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plugin.Serve(&plugin.ServeConfig{
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HandshakeConfig: handshake,
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Plugins: map[string]plugin.Plugin{
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"splunk": &protobufs.NotifierPlugin{
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Impl: sp,
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},
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},
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GRPCServer: plugin.DefaultGRPCServer,
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Logger: logger,
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})
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}
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