-
-
Notifications
You must be signed in to change notification settings - Fork 25
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
* feat: support waf rule in the backend * feat: add default rules to waf * feat: avoid editing the rule_cache from outside the object package * Update proxy.go --------- Co-authored-by: Gucheng <[email protected]>
- Loading branch information
Showing
10 changed files
with
191 additions
and
138 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| // Copyright 2024 The casbin Authors. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package rule | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net/http" | ||
|
|
||
| "github.com/casbin/caswaf/conf" | ||
| "github.com/casbin/caswaf/object" | ||
| "github.com/corazawaf/coraza/v3" | ||
| "github.com/corazawaf/coraza/v3/types" | ||
| "github.com/hsluoyz/modsecurity-go/seclang/parser" | ||
| ) | ||
|
|
||
| type WafRule struct{} | ||
|
|
||
| func (r *WafRule) checkRule(expressions []*object.Expression, req *http.Request) (bool, string, string, error) { | ||
| var ruleStr string | ||
| for _, expression := range expressions { | ||
| ruleStr += expression.Value | ||
| } | ||
| waf, err := coraza.NewWAF( | ||
| coraza.NewWAFConfig(). | ||
| WithErrorCallback(logError). | ||
| WithDirectives(conf.WafConf). | ||
| WithDirectives(ruleStr), | ||
| ) | ||
| if err != nil { | ||
| return false, "", "", fmt.Errorf("create WAF failed") | ||
| } | ||
| tx := waf.NewTransaction() | ||
| processRequest(tx, req) | ||
| matchedRules := tx.MatchedRules() | ||
| for _, matchedRule := range matchedRules { | ||
| rule := matchedRule.Rule() | ||
| directive, err := parser.NewSecLangScannerFromString(rule.Raw()).AllDirective() | ||
| if err != nil { | ||
| return false, "", "", err | ||
| } | ||
| for _, d := range directive { | ||
| ruleDirective := d.(*parser.RuleDirective) | ||
| for _, action := range ruleDirective.Actions.Action { | ||
| switch action.Tk { | ||
| case parser.TkActionBlock, parser.TkActionDeny: | ||
| return true, "Block", fmt.Sprintf("blocked by WAF rule: %d", rule.ID()), nil | ||
| case parser.TkActionAllow: | ||
| return true, "Allow", "", nil | ||
| case parser.TkActionDrop: | ||
| return true, "Drop", fmt.Sprintf("dropped by WAF rule: %d", rule.ID()), nil | ||
| default: | ||
| // skip other actions | ||
| continue | ||
| } | ||
| } | ||
| } | ||
| } | ||
| return false, "", "", nil | ||
| } | ||
|
|
||
| func processRequest(tx types.Transaction, req *http.Request) { | ||
| // Process URI and method | ||
| tx.ProcessURI(req.URL.String(), req.Method, req.Proto) | ||
|
|
||
| // Process request headers | ||
| for key, values := range req.Header { | ||
| for _, value := range values { | ||
| tx.AddRequestHeader(key, value) | ||
| } | ||
| } | ||
| tx.ProcessRequestHeaders() | ||
|
|
||
| // Process request body (if any) | ||
| if req.Body != nil { | ||
| _, err := tx.ProcessRequestBody() | ||
| if err != nil { | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func logError(error types.MatchedRule) { | ||
| msg := error.ErrorLog() | ||
| fmt.Printf("[WAFlogError][%s] %s\n", error.Rule().Severity(), msg) | ||
| } |
Oops, something went wrong.