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lists support from central api (#1074)

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* lists support from central api

Co-authored-by: Sebastien Blot <sebastien@crowdsec.net>
This commit is contained in:
Thibault "bui" Koechlin 2022-01-11 14:31:51 +01:00 committed by GitHub
parent 4a11060930
commit 3bca25fd6d
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 148 additions and 28 deletions
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6
cmd/crowdsec-cli/decisions.go
View file

@ -161,6 +161,7 @@ func NewDecisionsCmd() *cobra.Command {
ValueEquals: new(string),
ScopeEquals: new(string),
ScenarioEquals: new(string),
OriginEquals: new(string),
IPEquals: new(string),
RangeEquals: new(string),
Since: new(string),
@ -243,6 +244,10 @@ cscli decisions list -t ban
filter.RangeEquals = nil
}
if *filter.OriginEquals == "" {
filter.OriginEquals = nil
}
if contained != nil && *contained {
filter.Contains = new(bool)
}
@ -264,6 +269,7 @@ cscli decisions list -t ban
cmdDecisionsList.Flags().StringVar(filter.Until, "until", "", "restrict to alerts older than until (ie. 4h, 30d)")
cmdDecisionsList.Flags().StringVarP(filter.TypeEquals, "type", "t", "", "restrict to this decision type (ie. ban,captcha)")
cmdDecisionsList.Flags().StringVar(filter.ScopeEquals, "scope", "", "restrict to this scope (ie. ip,range,session)")
cmdDecisionsList.Flags().StringVar(filter.OriginEquals, "origin", "", "restrict to this origin (ie. lists,CAPI,cscli)")
cmdDecisionsList.Flags().StringVarP(filter.ValueEquals, "value", "v", "", "restrict to this value (ie. 1.2.3.4,userName)")
cmdDecisionsList.Flags().StringVarP(filter.ScenarioEquals, "scenario", "s", "", "restrict to this scenario (ie. crowdsecurity/ssh-bf)")
cmdDecisionsList.Flags().StringVarP(filter.IPEquals, "ip", "i", "", "restrict to alerts from this source ip (shorthand for --scope ip --value <IP>)")

1
cmd/crowdsec-cli/utils.go
View file

@ -68,7 +68,6 @@ func manageCliDecisionAlerts(ip *string, ipRange *string, scope *string, value *
*scope = types.Country
case "as":
*scope = types.AS
}
return nil
}

2
pkg/apiclient/alerts_service.go
View file

@ -19,6 +19,7 @@ type AlertsListOpts struct {
ScenarioEquals *string `url:"scenario,omitempty"`
IPEquals *string `url:"ip,omitempty"`
RangeEquals *string `url:"range,omitempty"`
OriginEquals *string `url:"origin,omitempty"`
Since *string `url:"since,omitempty"`
TypeEquals *string `url:"decision_type,omitempty"`
Until *string `url:"until,omitempty"`
@ -38,6 +39,7 @@ type AlertsDeleteOpts struct {
RangeEquals *string `url:"range,omitempty"`
Since *string `url:"since,omitempty"`
Until *string `url:"until,omitempty"`
OriginEquals *string `url:"origin,omitempty"`
ActiveDecisionEquals *bool `url:"has_active_decision,omitempty"`
SourceEquals *string `url:"alert_source,omitempty"`
Contains *bool `url:"contains,omitempty"`

155
pkg/apiserver/apic.go
View file

@ -234,6 +234,10 @@ func (a *apic) Send(cacheOrig *models.AddSignalsRequest) {
}
}
var SCOPE_CAPI string = "CAPI"
var SCOPE_CAPI_ALIAS string = "crowdsecurity/community-blocklist" //we don't use "CAPI" directly, to make it less confusing for the user
var SCOPE_LISTS string = "lists"
func (a *apic) PullTop() error {
var err error
@ -256,10 +260,28 @@ func (a *apic) PullTop() error {
if a.startup {
a.startup = false
}
// process deleted decisions
/*to count additions/deletions accross lists*/
var add_counters map[string]map[string]int
var delete_counters map[string]map[string]int
add_counters = make(map[string]map[string]int)
add_counters[SCOPE_CAPI] = make(map[string]int)
add_counters[SCOPE_LISTS] = make(map[string]int)
delete_counters = make(map[string]map[string]int)
delete_counters[SCOPE_CAPI] = make(map[string]int)
delete_counters[SCOPE_LISTS] = make(map[string]int)
var filter map[string][]string
var nbDeleted int
// process deleted decisions
for _, decision := range data.Deleted {
//count individual deletions
if *decision.Origin == SCOPE_CAPI {
delete_counters[SCOPE_CAPI][*decision.Scenario]++
} else if *decision.Origin == SCOPE_LISTS {
delete_counters[SCOPE_LISTS][*decision.Scenario]++
} else {
log.Warningf("Unknown origin %s", *decision.Origin)
}
if strings.ToLower(*decision.Scope) == "ip" {
filter = make(map[string][]string, 1)
filter["value"] = []string{*decision.Value}
@ -287,23 +309,77 @@ func (a *apic) PullTop() error {
return nil
}
capiPullTopX := models.Alert{}
capiPullTopX.Scenario = types.StrPtr(fmt.Sprintf("update : +%d/-%d IPs", len(data.New), len(data.Deleted)))
capiPullTopX.Message = types.StrPtr("")
capiPullTopX.Source = &models.Source{}
capiPullTopX.Source.Scope = types.StrPtr("crowdsec/community-blocklist")
capiPullTopX.Source.Value = types.StrPtr("")
capiPullTopX.StartAt = types.StrPtr(time.Now().Format(time.RFC3339))
capiPullTopX.StopAt = types.StrPtr(time.Now().Format(time.RFC3339))
capiPullTopX.Capacity = types.Int32Ptr(0)
capiPullTopX.Simulated = types.BoolPtr(false)
capiPullTopX.EventsCount = types.Int32Ptr(int32(len(data.New)))
capiPullTopX.Leakspeed = types.StrPtr("")
capiPullTopX.ScenarioHash = types.StrPtr("")
capiPullTopX.ScenarioVersion = types.StrPtr("")
capiPullTopX.MachineID = database.CapiMachineID
// process new decisions
//we receive only one list of decisions, that we need to break-up :
// one alert for "community blocklist"
// one alert per list we're subscribed to
var alertsFromCapi []*models.Alert
alertsFromCapi = make([]*models.Alert, 0)
//iterate over all new decisions, and simply create corresponding alerts
for _, decision := range data.New {
found := false
for _, sub := range alertsFromCapi {
if sub.Source.Scope == nil {
log.Warningf("nil scope in %+v", sub)
continue
}
if *decision.Origin == SCOPE_CAPI {
if *sub.Source.Scope == SCOPE_CAPI {
found = true
break
}
} else if *decision.Origin == SCOPE_LISTS {
if *sub.Source.Scope == *decision.Origin {
if sub.Scenario == nil {
log.Warningf("nil scenario in %+v", sub)
}
if *sub.Scenario == *decision.Scenario {
found = true
break
}
}
} else {
log.Warningf("unknown origin %s : %+v", *decision.Origin, decision)
}
}
if !found {
log.Debugf("Create entry for origin:%s scenario:%s", *decision.Origin, *decision.Scenario)
newAlert := models.Alert{}
newAlert.Message = types.StrPtr("")
newAlert.Source = &models.Source{}
if *decision.Origin == SCOPE_CAPI { //to make things more user friendly, we replace CAPI with community-blocklist
newAlert.Source.Scope = types.StrPtr(SCOPE_CAPI)
newAlert.Scenario = types.StrPtr(SCOPE_CAPI)
} else if *decision.Origin == SCOPE_LISTS {
newAlert.Source.Scope = types.StrPtr(SCOPE_LISTS)
newAlert.Scenario = types.StrPtr(*decision.Scenario)
} else {
log.Warningf("unknown origin %s", *decision.Origin)
}
newAlert.Source.Value = types.StrPtr("")
newAlert.StartAt = types.StrPtr(time.Now().Format(time.RFC3339))
newAlert.StopAt = types.StrPtr(time.Now().Format(time.RFC3339))
newAlert.Capacity = types.Int32Ptr(0)
newAlert.Simulated = types.BoolPtr(false)
newAlert.EventsCount = types.Int32Ptr(int32(len(data.New)))
newAlert.Leakspeed = types.StrPtr("")
newAlert.ScenarioHash = types.StrPtr("")
newAlert.ScenarioVersion = types.StrPtr("")
newAlert.MachineID = database.CapiMachineID
alertsFromCapi = append(alertsFromCapi, &newAlert)
}
}
//iterate a second time and fill the alerts with the new decisions
for _, decision := range data.New {
//count and create separate alerts for each list
if *decision.Origin == SCOPE_CAPI {
add_counters[SCOPE_CAPI]["all"]++
} else if *decision.Origin == SCOPE_LISTS {
add_counters[SCOPE_LISTS][*decision.Scenario]++
} else {
log.Warningf("Unknown origin %s", *decision.Origin)
}
/*CAPI might send lower case scopes, unify it.*/
switch strings.ToLower(*decision.Scope) {
@ -312,17 +388,48 @@ func (a *apic) PullTop() error {
case "range":
*decision.Scope = types.Range
}
capiPullTopX.Decisions = append(capiPullTopX.Decisions, decision)
found := false
//add the individual decisions to the right list
for idx, alert := range alertsFromCapi {
if *decision.Origin == SCOPE_CAPI {
if *alert.Source.Scope == SCOPE_CAPI {
alertsFromCapi[idx].Decisions = append(alertsFromCapi[idx].Decisions, decision)
found = true
break
}
} else if *decision.Origin == SCOPE_LISTS {
if *alert.Source.Scope == SCOPE_LISTS && *alert.Scenario == *decision.Scenario {
alertsFromCapi[idx].Decisions = append(alertsFromCapi[idx].Decisions, decision)
found = true
break
}
} else {
log.Warningf("unknown origin %s", *decision.Origin)
}
}
if !found {
log.Warningf("Orphaned decision for %s - %s", *decision.Origin, *decision.Scenario)
}
}
alertID, inserted, deleted, err := a.dbClient.UpdateCommunityBlocklist(&capiPullTopX)
for idx, alert := range alertsFromCapi {
formatted_update := ""
if *alertsFromCapi[idx].Source.Scope == SCOPE_CAPI {
*alertsFromCapi[idx].Source.Scope = SCOPE_CAPI_ALIAS
formatted_update = fmt.Sprintf("update : +%d/-%d IPs", add_counters[SCOPE_CAPI]["all"], delete_counters[SCOPE_CAPI]["all"])
} else if *alertsFromCapi[idx].Source.Scope == SCOPE_LISTS {
*alertsFromCapi[idx].Source.Scope = fmt.Sprintf("%s:%s", SCOPE_LISTS, *alertsFromCapi[idx].Scenario)
formatted_update = fmt.Sprintf("update : +%d/-%d IPs", add_counters[SCOPE_LISTS][*alert.Scenario], delete_counters[SCOPE_LISTS][*alert.Scenario])
}
alertsFromCapi[idx].Scenario = types.StrPtr(formatted_update)
log.Debugf("%s has %d decisions", *alertsFromCapi[idx].Source.Scope, len(alertsFromCapi[idx].Decisions))
alertID, inserted, deleted, err := a.dbClient.UpdateCommunityBlocklist(alertsFromCapi[idx])
if err != nil {
return errors.Wrap(err, "while saving alert from capi/community-blocklist")
return errors.Wrapf(err, "while saving alert from %s", *alertsFromCapi[idx].Source.Scope)
}
log.Printf("%s : added %d entries, deleted %d entries (alert:%d)", *alertsFromCapi[idx].Source.Scope, inserted, deleted, alertID)
}
log.Printf("capi/community-blocklist : added %d entries, deleted %d entries (alert:%d)", inserted, deleted, alertID)
return nil
}

10
pkg/database/alerts.go
View file

@ -561,6 +561,10 @@ func BuildAlertRequestFromFilter(alerts *ent.AlertQuery, filter map[string][]str
delete(filter, "simulated")
}
if _, ok := filter["origin"]; ok {
filter["include_capi"] = []string{"true"}
}
for param, value := range filter {
switch param {
case "contains":
@ -579,7 +583,7 @@ func BuildAlertRequestFromFilter(alerts *ent.AlertQuery, filter map[string][]str
case "value":
alerts = alerts.Where(alert.SourceValueEQ(value[0]))
case "scenario":
alerts = alerts.Where(alert.ScenarioEQ(value[0]))
alerts = alerts.Where(alert.HasDecisionsWith(decision.ScenarioEQ(value[0])))
case "ip", "range":
ip_sz, start_ip, start_sfx, end_ip, end_sfx, err = types.Addr2Ints(value[0])
if err != nil {
@ -617,9 +621,11 @@ func BuildAlertRequestFromFilter(alerts *ent.AlertQuery, filter map[string][]str
alerts = alerts.Where(alert.StartedAtLTE(until))
case "decision_type":
alerts = alerts.Where(alert.HasDecisionsWith(decision.TypeEQ(value[0])))
case "origin":
alerts = alerts.Where(alert.HasDecisionsWith(decision.OriginEQ(value[0])))
case "include_capi": //allows to exclude one or more specific origins
if value[0] == "false" {
alerts = alerts.Where(alert.HasDecisionsWith(decision.OriginNEQ(CapiMachineID)))
alerts = alerts.Where(alert.HasDecisionsWith(decision.Or(decision.OriginEQ("crowdsec"), decision.OriginEQ("cscli"))))
} else if value[0] != "true" {
log.Errorf("Invalid bool '%s' for include_capi", value[0])
}