577 lines
18 KiB
Go
577 lines
18 KiB
Go
package database
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import (
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/crowdsecurity/crowdsec/pkg/database/ent"
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"github.com/crowdsecurity/crowdsec/pkg/database/ent/alert"
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"github.com/crowdsecurity/crowdsec/pkg/database/ent/decision"
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"github.com/crowdsecurity/crowdsec/pkg/database/ent/event"
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"github.com/crowdsecurity/crowdsec/pkg/database/ent/meta"
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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/davecgh/go-spew/spew"
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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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)
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const (
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paginationSize = 100 // used to queryAlert to avoid 'too many SQL variable'
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defaultLimit = 100 // default limit of element to returns when query alerts
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bulkSize = 50 // bulk size when create alerts
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)
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func formatAlertAsString(machineId string, alert *models.Alert) []string {
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var retStr []string
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/**/
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src := ""
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if alert.Source != nil {
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if *alert.Source.Scope == types.Ip {
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src = fmt.Sprintf("ip %s", *alert.Source.Value)
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if alert.Source.Cn != "" {
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src += " (" + alert.Source.Cn
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if alert.Source.AsNumber != "" {
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src += "/" + alert.Source.AsNumber
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}
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src += ")"
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}
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} else if *alert.Source.Scope == types.Range {
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src = fmt.Sprintf("range %s", *alert.Source.Value)
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if alert.Source.Cn != "" {
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src += " (" + alert.Source.Cn
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if alert.Source.AsNumber != "" {
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src += "/" + alert.Source.AsNumber
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}
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src += ")"
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}
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} else {
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src = fmt.Sprintf("%s %s", *alert.Source.Scope, *alert.Source.Value)
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}
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} else {
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src = "empty source"
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}
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/**/
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reason := ""
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if *alert.Scenario != "" {
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reason = fmt.Sprintf("%s by %s", *alert.Scenario, src)
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} else if *alert.Message != "" {
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reason = fmt.Sprintf("%s by %s", *alert.Scenario, src)
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} else {
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reason = fmt.Sprintf("empty scenario by %s", src)
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}
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if len(alert.Decisions) > 0 {
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for _, decisionItem := range alert.Decisions {
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decision := ""
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if alert.Simulated != nil && *alert.Simulated {
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decision = "(simulated alert)"
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} else if decisionItem.Simulated != nil && *decisionItem.Simulated {
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decision = "(simulated decision)"
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}
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if log.GetLevel() >= log.DebugLevel {
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/*spew is expensive*/
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log.Debugf("%s", spew.Sdump(decisionItem))
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}
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decision += fmt.Sprintf("%s %s on %s %s", *decisionItem.Duration,
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*decisionItem.Type, *decisionItem.Scope, *decisionItem.Value)
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retStr = append(retStr,
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fmt.Sprintf("(%s/%s) %s : %s", machineId,
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*decisionItem.Origin, reason, decision))
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}
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} else {
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retStr = append(retStr, fmt.Sprintf("(%s) alert : %s", machineId, reason))
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}
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return retStr
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}
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func (c *Client) CreateAlert(machineID string, alertList []*models.Alert) ([]string, error) {
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pageStart := 0
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pageEnd := bulkSize
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ret := []string{}
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for {
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if pageEnd >= len(alertList) {
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results, err := c.CreateAlertBulk(machineID, alertList[pageStart:])
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if err != nil {
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return []string{}, fmt.Errorf("unable to create alerts: %s", err)
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}
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ret = append(ret, results...)
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break
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}
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results, err := c.CreateAlertBulk(machineID, alertList[pageStart:pageEnd])
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if err != nil {
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return []string{}, fmt.Errorf("unable to create alerts: %s", err)
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}
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ret = append(ret, results...)
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pageStart += bulkSize
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pageEnd += bulkSize
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}
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return ret, nil
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}
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func (c *Client) CreateAlertBulk(machineId string, alertList []*models.Alert) ([]string, error) {
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ret := []string{}
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bulkSize := 20
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c.Log.Debugf("writting %d items", len(alertList))
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bulk := make([]*ent.AlertCreate, 0, bulkSize)
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for i, alertItem := range alertList {
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var decisions []*ent.Decision
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var metas []*ent.Meta
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var events []*ent.Event
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owner, err := c.QueryMachineByID(machineId)
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if err != nil {
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if errors.Cause(err) != UserNotExists {
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return []string{}, errors.Wrapf(QueryFail, "machine '%s': %s", alertItem.MachineID, err)
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}
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log.Debugf("CreateAlertBulk: Machine Id %s doesn't exist", machineId)
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owner = nil
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}
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startAtTime, err := time.Parse(time.RFC3339, *alertItem.StartAt)
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if err != nil {
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return []string{}, errors.Wrapf(ParseTimeFail, "start_at field time '%s': %s", *alertItem.StartAt, err)
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}
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stopAtTime, err := time.Parse(time.RFC3339, *alertItem.StopAt)
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if err != nil {
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return []string{}, errors.Wrapf(ParseTimeFail, "stop_at field time '%s': %s", *alertItem.StopAt, err)
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}
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/*display proper alert in logs*/
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for _, disp := range formatAlertAsString(machineId, alertItem) {
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log.Info(disp)
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}
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if len(alertItem.Events) > 0 {
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eventBulk := make([]*ent.EventCreate, len(alertItem.Events))
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for i, eventItem := range alertItem.Events {
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ts, err := time.Parse(time.RFC3339, *eventItem.Timestamp)
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if err != nil {
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return []string{}, errors.Wrapf(ParseTimeFail, "event timestamp '%s' : %s", *eventItem.Timestamp, err)
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}
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marshallMetas, err := json.Marshal(eventItem.Meta)
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if err != nil {
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return []string{}, errors.Wrapf(MarshalFail, "event meta '%v' : %s", eventItem.Meta, err)
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}
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eventBulk[i] = c.Ent.Event.Create().
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SetTime(ts).
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SetSerialized(string(marshallMetas))
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}
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events, err = c.Ent.Event.CreateBulk(eventBulk...).Save(c.CTX)
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if err != nil {
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return []string{}, errors.Wrapf(BulkError, "creating alert events: %s", err)
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}
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}
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if len(alertItem.Meta) > 0 {
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metaBulk := make([]*ent.MetaCreate, len(alertItem.Meta))
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for i, metaItem := range alertItem.Meta {
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metaBulk[i] = c.Ent.Meta.Create().
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SetKey(metaItem.Key).
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SetValue(metaItem.Value)
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}
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metas, err = c.Ent.Meta.CreateBulk(metaBulk...).Save(c.CTX)
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if err != nil {
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return []string{}, errors.Wrapf(BulkError, "creating alert meta: %s", err)
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}
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}
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ts, err := time.Parse(time.RFC3339, *alertItem.StopAt)
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if err != nil {
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log.Errorf("While parsing StartAt of item %s : %s", *alertItem.StopAt, err)
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ts = time.Now()
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}
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if len(alertItem.Decisions) > 0 {
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decisionBulk := make([]*ent.DecisionCreate, len(alertItem.Decisions))
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for i, decisionItem := range alertItem.Decisions {
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duration, err := time.ParseDuration(*decisionItem.Duration)
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if err != nil {
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return []string{}, errors.Wrapf(ParseDurationFail, "decision duration '%v' : %s", decisionItem.Duration, err)
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}
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decisionBulk[i] = c.Ent.Decision.Create().
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SetUntil(ts.Add(duration)).
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SetScenario(*decisionItem.Scenario).
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SetType(*decisionItem.Type).
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SetStartIP(decisionItem.StartIP).
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SetEndIP(decisionItem.EndIP).
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SetValue(*decisionItem.Value).
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SetScope(*decisionItem.Scope).
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SetOrigin(*decisionItem.Origin).
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SetSimulated(*alertItem.Simulated)
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}
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decisions, err = c.Ent.Decision.CreateBulk(decisionBulk...).Save(c.CTX)
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if err != nil {
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return []string{}, errors.Wrapf(BulkError, "creating alert decisions: %s", err)
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}
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}
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alertB := c.Ent.Alert.
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Create().
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SetScenario(*alertItem.Scenario).
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SetMessage(*alertItem.Message).
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SetEventsCount(*alertItem.EventsCount).
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SetStartedAt(startAtTime).
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SetStoppedAt(stopAtTime).
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SetSourceScope(*alertItem.Source.Scope).
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SetSourceValue(*alertItem.Source.Value).
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SetSourceIp(alertItem.Source.IP).
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SetSourceRange(alertItem.Source.Range).
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SetSourceAsNumber(alertItem.Source.AsNumber).
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SetSourceAsName(alertItem.Source.AsName).
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SetSourceCountry(alertItem.Source.Cn).
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SetSourceLatitude(alertItem.Source.Latitude).
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SetSourceLongitude(alertItem.Source.Longitude).
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SetCapacity(*alertItem.Capacity).
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SetLeakSpeed(*alertItem.Leakspeed).
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SetSimulated(*alertItem.Simulated).
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SetScenarioVersion(*alertItem.ScenarioVersion).
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SetScenarioHash(*alertItem.ScenarioHash).
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AddDecisions(decisions...).
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AddEvents(events...).
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AddMetas(metas...)
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if owner != nil {
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alertB.SetOwner(owner)
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}
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bulk = append(bulk, alertB)
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if len(bulk) == bulkSize {
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alerts, err := c.Ent.Alert.CreateBulk(bulk...).Save(c.CTX)
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if err != nil {
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return []string{}, errors.Wrapf(BulkError, "bulk creating alert : %s", err)
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}
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for _, alert := range alerts {
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ret = append(ret, strconv.Itoa(alert.ID))
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}
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if len(alertList)-i <= bulkSize {
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bulk = make([]*ent.AlertCreate, 0, (len(alertList) - i))
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} else {
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bulk = make([]*ent.AlertCreate, 0, bulkSize)
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}
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}
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}
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alerts, err := c.Ent.Alert.CreateBulk(bulk...).Save(c.CTX)
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if err != nil {
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return []string{}, errors.Wrapf(BulkError, "leftovers creating alert : %s", err)
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}
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for _, alert := range alerts {
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ret = append(ret, strconv.Itoa(alert.ID))
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}
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return ret, nil
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}
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func BuildAlertRequestFromFilter(alerts *ent.AlertQuery, filter map[string][]string) (*ent.AlertQuery, error) {
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var err error
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var startIP, endIP int64
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var hasActiveDecision bool
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/*the simulated filter is a bit different : if it's not present *or* set to false, specifically exclude records with simulated to true */
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if v, ok := filter["simulated"]; ok {
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if v[0] == "false" {
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alerts = alerts.Where(alert.SimulatedEQ(false))
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}
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delete(filter, "simulated")
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}
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for param, value := range filter {
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switch param {
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case "scope":
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var scope string = value[0]
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if strings.ToLower(scope) == "ip" {
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scope = types.Ip
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} else if strings.ToLower(scope) == "range" {
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scope = types.Range
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}
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alerts = alerts.Where(alert.SourceScopeEQ(scope))
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case "value":
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alerts = alerts.Where(alert.SourceValueEQ(value[0]))
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case "scenario":
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alerts = alerts.Where(alert.ScenarioEQ(value[0]))
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case "ip":
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isValidIP := IsIpv4(value[0])
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if !isValidIP {
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return nil, errors.Wrapf(InvalidIPOrRange, "unable to parse '%s': %s", value[0], err)
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}
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startIP, endIP, err = GetIpsFromIpRange(value[0] + "/32")
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if err != nil {
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return nil, errors.Wrapf(InvalidIPOrRange, "unable to convert '%s' to int interval: %s", value[0], err)
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}
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case "range":
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startIP, endIP, err = GetIpsFromIpRange(value[0])
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if err != nil {
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return nil, errors.Wrapf(InvalidIPOrRange, "unable to convert '%s' to int interval: %s", value[0], err)
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}
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case "since":
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duration, err := types.ParseDuration(value[0])
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if err != nil {
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return nil, errors.Wrap(err, "while parsing duration")
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}
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since := time.Now().Add(-duration)
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if since.IsZero() {
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return nil, fmt.Errorf("Empty time now() - %s", since.String())
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}
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alerts = alerts.Where(alert.StartedAtGTE(since))
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case "created_before":
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duration, err := types.ParseDuration(value[0])
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if err != nil {
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return nil, errors.Wrap(err, "while parsing duration")
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}
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since := time.Now().Add(-duration)
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if since.IsZero() {
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return nil, fmt.Errorf("Empty time now() - %s", since.String())
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}
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alerts = alerts.Where(alert.CreatedAtLTE(since))
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case "until":
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duration, err := types.ParseDuration(value[0])
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if err != nil {
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return nil, errors.Wrap(err, "while parsing duration")
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}
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until := time.Now().Add(-duration)
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if until.IsZero() {
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return nil, fmt.Errorf("Empty time now() - %s", until.String())
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}
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alerts = alerts.Where(alert.StartedAtLTE(until))
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case "decision_type":
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alerts = alerts.Where(alert.HasDecisionsWith(decision.TypeEQ(value[0])))
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case "include_capi": //allows to exclude one or more specific origins
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if value[0] == "false" {
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alerts = alerts.Where(alert.HasDecisionsWith(decision.OriginNEQ("CAPI")))
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} else if value[0] != "true" {
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log.Errorf("Invalid bool '%s' for include_capi", value[0])
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}
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case "has_active_decision":
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if hasActiveDecision, err = strconv.ParseBool(value[0]); err != nil {
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return nil, errors.Wrapf(ParseType, "'%s' is not a boolean: %s", value[0], err)
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}
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if hasActiveDecision {
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alerts = alerts.Where(alert.HasDecisionsWith(decision.UntilGTE(time.Now())))
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} else {
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alerts = alerts.Where(alert.Not(alert.HasDecisions()))
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}
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case "limit":
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continue
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case "sort":
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continue
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default:
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return nil, errors.Wrapf(InvalidFilter, "Filter parameter '%s' is unknown (=%s)", param, value[0])
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}
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}
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if startIP != 0 && endIP != 0 {
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/*the user is checking for a single IP*/
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if startIP == endIP {
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//DECISION_START <= IP_Q >= DECISON_END
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alerts = alerts.Where(alert.And(
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alert.HasDecisionsWith(decision.StartIPLTE(startIP)),
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alert.HasDecisionsWith(decision.EndIPGTE(endIP)),
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))
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} else { /*the user is checking for a RANGE */
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//START_Q >= DECISION_START AND END_Q <= DECISION_END
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alerts = alerts.Where(alert.And(
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alert.HasDecisionsWith(decision.StartIPGTE(startIP)),
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alert.HasDecisionsWith(decision.EndIPLTE(endIP)),
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))
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}
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}
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return alerts, nil
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}
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func (c *Client) TotalAlerts() (int, error) {
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return c.Ent.Alert.Query().Count(c.CTX)
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}
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func (c *Client) QueryAlertWithFilter(filter map[string][]string) ([]*ent.Alert, error) {
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sort := "DESC" // we sort by desc by default
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if val, ok := filter["sort"]; ok {
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if val[0] != "ASC" && val[0] != "DESC" {
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log.Errorf("invalid 'sort' parameter: %s", val)
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} else {
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sort = val[0]
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}
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}
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limit := defaultLimit
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if val, ok := filter["limit"]; ok {
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limitConv, err := strconv.Atoi(val[0])
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if err != nil {
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return []*ent.Alert{}, errors.Wrapf(QueryFail, "bad limit in parameters: %s", val)
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}
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limit = limitConv
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}
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offset := 0
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ret := make([]*ent.Alert, 0)
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for {
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alerts := c.Ent.Alert.Query()
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alerts, err := BuildAlertRequestFromFilter(alerts, filter)
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if err != nil {
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return []*ent.Alert{}, err
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}
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alerts = alerts.
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WithDecisions().
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WithEvents().
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WithMetas().
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WithOwner()
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if sort == "ASC" {
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alerts = alerts.Order(ent.Asc(alert.FieldCreatedAt))
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} else {
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alerts = alerts.Order(ent.Desc(alert.FieldCreatedAt))
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}
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if limit == 0 {
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limit, err = alerts.Count(c.CTX)
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if err != nil {
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return []*ent.Alert{}, fmt.Errorf("unable to count nb alerts: %s", err)
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}
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}
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result, err := alerts.Limit(paginationSize).Offset(offset).All(c.CTX)
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if err != nil {
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return []*ent.Alert{}, errors.Wrapf(QueryFail, "pagination size: %d, offset: %d: %s", paginationSize, offset, err)
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}
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if diff := limit - len(ret); diff < paginationSize {
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if len(result) < diff {
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ret = append(ret, result...)
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log.Debugf("Pagination done, %d < %d", len(result), diff)
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break
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}
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ret = append(ret, result[0:diff]...)
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} else {
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ret = append(ret, result...)
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}
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if len(ret) == limit || len(ret) == 0 {
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log.Debugf("Pagination done len(ret) = %d", len(ret))
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break
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}
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offset += paginationSize
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}
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return ret, nil
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}
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func (c *Client) DeleteAlertGraph(alertItem *ent.Alert) error {
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// delete the associated events
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_, err := c.Ent.Event.Delete().
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Where(event.HasOwnerWith(alert.IDEQ(alertItem.ID))).Exec(c.CTX)
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if err != nil {
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log.Warningf("DeleteAlertGraph : %s", err)
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return errors.Wrapf(DeleteFail, "event with alert ID '%d'", alertItem.ID)
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}
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// delete the associated meta
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_, err = c.Ent.Meta.Delete().
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Where(meta.HasOwnerWith(alert.IDEQ(alertItem.ID))).Exec(c.CTX)
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if err != nil {
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log.Warningf("DeleteAlertGraph : %s", err)
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return errors.Wrapf(DeleteFail, "meta with alert ID '%d'", alertItem.ID)
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}
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// delete the associated decisions
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_, err = c.Ent.Decision.Delete().
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|
Where(decision.HasOwnerWith(alert.IDEQ(alertItem.ID))).Exec(c.CTX)
|
|
if err != nil {
|
|
log.Warningf("DeleteAlertGraph : %s", err)
|
|
return errors.Wrapf(DeleteFail, "decision with alert ID '%d'", alertItem.ID)
|
|
}
|
|
|
|
// delete the alert
|
|
err = c.Ent.Alert.DeleteOne(alertItem).Exec(c.CTX)
|
|
if err != nil {
|
|
log.Warningf("DeleteAlertGraph : %s", err)
|
|
return errors.Wrapf(DeleteFail, "alert with ID '%d'", alertItem.ID)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *Client) DeleteAlertWithFilter(filter map[string][]string) (int, error) {
|
|
var err error
|
|
|
|
// Get all the alerts that match the filter
|
|
alertsToDelete, err := c.QueryAlertWithFilter(filter)
|
|
|
|
for _, alertItem := range alertsToDelete {
|
|
err = c.DeleteAlertGraph(alertItem)
|
|
if err != nil {
|
|
log.Warningf("DeleteAlertWithFilter : %s", err)
|
|
return 0, errors.Wrapf(DeleteFail, "event with alert ID '%d'", alertItem.ID)
|
|
}
|
|
}
|
|
return len(alertsToDelete), nil
|
|
}
|
|
|
|
func (c *Client) FlushAlerts(MaxAge string, MaxItems int) error {
|
|
var deletedByAge int
|
|
var deletedByNbItem int
|
|
var totalAlerts int
|
|
var err error
|
|
totalAlerts, err = c.TotalAlerts()
|
|
if err != nil {
|
|
log.Warningf("FlushAlerts (max items count) : %s", err)
|
|
return errors.Wrap(err, "unable to get alerts count")
|
|
}
|
|
if MaxAge != "" {
|
|
filter := map[string][]string{
|
|
"created_before": {MaxAge},
|
|
}
|
|
nbDeleted, err := c.DeleteAlertWithFilter(filter)
|
|
if err != nil {
|
|
log.Warningf("FlushAlerts (max age) : %s", err)
|
|
return errors.Wrapf(err, "unable to flush alerts with filter until: %s", MaxAge)
|
|
}
|
|
deletedByAge = nbDeleted
|
|
}
|
|
if MaxItems > 0 {
|
|
if totalAlerts > MaxItems {
|
|
nbToDelete := totalAlerts - MaxItems
|
|
alerts, err := c.QueryAlertWithFilter(map[string][]string{
|
|
"sort": {"ASC"},
|
|
"limit": {strconv.Itoa(nbToDelete)},
|
|
}) // we want to delete older alerts if we reach the max number of items
|
|
if err != nil {
|
|
log.Warningf("FlushAlerts (max items query) : %s", err)
|
|
return errors.Wrap(err, "unable to get all alerts")
|
|
}
|
|
for itemNb, alert := range alerts {
|
|
if itemNb < nbToDelete {
|
|
err := c.DeleteAlertGraph(alert)
|
|
if err != nil {
|
|
log.Warningf("FlushAlerts : %s", err)
|
|
return errors.Wrap(err, "unable to flush alert")
|
|
}
|
|
deletedByNbItem++
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if deletedByNbItem > 0 {
|
|
log.Infof("flushed %d/%d alerts because max number of alerts has been reached (%d max)", deletedByNbItem, totalAlerts, MaxItems)
|
|
}
|
|
if deletedByAge > 0 {
|
|
log.Infof("flushed %d/%d alerts because they were created %s ago or more", deletedByAge, totalAlerts, MaxAge)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (c *Client) GetAlertByID(alertID int) (*ent.Alert, error) {
|
|
alert, err := c.Ent.Alert.Query().Where(alert.IDEQ(alertID)).WithDecisions().WithEvents().WithMetas().WithOwner().First(c.CTX)
|
|
if err != nil {
|
|
/*record not found, 404*/
|
|
if ent.IsNotFound(err) {
|
|
log.Warningf("GetAlertByID (not found): %s", err)
|
|
return &ent.Alert{}, ItemNotFound
|
|
}
|
|
log.Warningf("GetAlertByID : %s", err)
|
|
return &ent.Alert{}, QueryFail
|
|
}
|
|
return alert, nil
|
|
}
|