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Each request gets sorted tags from the lookup, new address lists, the reputation sources and the rule matches, logged as `tags`. New settings: `SWW_TAG_LISTS`, `SWW_TAG_DENY`, `SWW_TAG_LIMIT_PERCENT`. They replace `SWW_ASN_LIMIT_PERCENT`, `SWW_COUNTRY_LIMIT_PERCENT` and `SWW_DENIED_COUNTRIES`. New heuristics `tag_lists` and `tag_deny`; the latter runs before the rate limits and again after the Core Rule Set. Model: opus-5-5
51 lines
1.5 KiB
Go
51 lines
1.5 KiB
Go
package discriminator
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// The heuristic crowdsec. It reads SWW_CROWDSEC_LAPI_URL, and the decisions
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// through the reputation lists.
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import (
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"context"
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"time"
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"sneak.berlin/go/smallwebwaf/internal/bans"
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"sneak.berlin/go/smallwebwaf/internal/reputation"
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"sneak.berlin/go/smallwebwaf/internal/requestlog"
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)
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// crowdSec refuses a request when a decision of the CrowdSec decision list on
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// the client is in force at now. It then adds the tag crowdsec, notes the
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// list, as noteHit does, and bans the client until that decision ends. Its
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// figures are the decision's scenario and when it ends.
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type crowdSec struct{}
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func (crowdSec) name() string { return "crowdsec" }
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func (crowdSec) check(_ context.Context, rq *request, now time.Time) *verdict {
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decision, listed := rq.crowdSecDecisionInForce(now)
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if !listed {
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return nil
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}
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rq.addTag("crowdsec")
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rq.noteHit(bans.ReputationHit{Source: rq.h.config.CrowdSecDecisionsURL},
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"listed by the CrowdSec decision list")
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rq.banForCrowdSec(now, decision)
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return &verdict{
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action: requestlog.ActionBanned,
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figures: map[string]any{
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"scenario": decision.Scenario,
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"expires": requestlog.FormatTime(decision.Expires),
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},
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}
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}
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// crowdSecDecisionInForce returns the decision of the CrowdSec decision list on
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// the client that is in force at now, and reports whether there is one, which
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// the heuristic crowdsec refuses the request for.
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func (rq *request) crowdSecDecisionInForce(
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now time.Time,
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) (reputation.Decision, bool) {
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return rq.h.lists.CrowdSecDecision(rq.client, now)
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}
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