clawbot
8378f4b52c
check / check (push) Waiting to run
Every *.rules file in SWWAF_RULES_DIR not named with a leading dot is read at start, and again 2 seconds after the directory's last change. Each request is checked against the rules after the rate limits: log notes a match, block refuses with 403, ban refuses and bans the netblock for SWWAF_ATTACK_BAN_DURATION, made permanent by its next request or attack. path, query and uri are matched as the request line sent them; header:Host and header:Transfer-Encoding are refused. Bans gain a cause. The image ships 00-default.rules. Judgement call: a header sent twice is matched with its values joined by ", ". Judgement call: SWWAF_MAX_BAN_DURATION does not cap a ban for an attack. Not in this unit: offences for rule matches, with the error burst. Model: opus-5-5
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
package proxy
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import (
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"time"
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"sneak.berlin/go/smallwebwaf/internal/requestlog"
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"sneak.berlin/go/smallwebwaf/internal/rules"
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)
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// checkRules checks the request against the rules of the rule files at
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// now, notes the ids of those it matches in the log line, and returns the
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// action of the rule that refuses it, ActionRuleBlocked for a block rule
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// and ActionBanned for a ban rule, or "" when none does. In enforce mode
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// a ban rule bans the client's netblock for a clear sign of attack.
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func (rq *request) checkRules(now time.Time) string {
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matched := rq.h.rules.Match(rq.in)
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for _, rule := range matched {
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rq.line.RuleIDs = append(rq.line.RuleIDs, rule.ID)
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rq.h.metrics.RuleMatched(rule.ID, rule.Action)
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}
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if len(matched) == 0 {
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return ""
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}
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// Only the last rule matched can refuse the request.
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switch last := matched[len(matched)-1]; last.Action {
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case rules.ActionBlock:
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return requestlog.ActionRuleBlocked
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case rules.ActionBan:
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if !rq.h.config.Observe {
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rq.banForAttack(now, last)
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}
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return requestlog.ActionBanned
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default:
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return ""
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}
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}
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