mirror of
https://github.com/securego/gosec.git
synced 2024-12-26 12:35:52 +00:00
71 lines
2 KiB
Go
71 lines
2 KiB
Go
// (c) Copyright 2016 Hewlett Packard Enterprise Development LP
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package rules
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import (
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"go/ast"
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"github.com/securego/gosec/v2"
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"github.com/securego/gosec/v2/issue"
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)
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type slowloris struct {
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issue.MetaData
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}
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func (r *slowloris) ID() string {
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return r.MetaData.ID
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}
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func containsReadHeaderTimeout(node *ast.CompositeLit) bool {
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if node == nil {
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return false
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}
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for _, elt := range node.Elts {
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if kv, ok := elt.(*ast.KeyValueExpr); ok {
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if ident, ok := kv.Key.(*ast.Ident); ok {
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if ident.Name == "ReadHeaderTimeout" || ident.Name == "ReadTimeout" {
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return true
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}
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}
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}
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}
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return false
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}
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func (r *slowloris) Match(n ast.Node, ctx *gosec.Context) (*issue.Issue, error) {
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switch node := n.(type) {
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case *ast.CompositeLit:
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actualType := ctx.Info.TypeOf(node.Type)
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if actualType != nil && actualType.String() == "net/http.Server" {
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if !containsReadHeaderTimeout(node) {
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return ctx.NewIssue(node, r.ID(), r.What, r.Severity, r.Confidence), nil
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}
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}
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}
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return nil, nil
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}
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// NewSlowloris attempts to find the http.Server struct and check if the ReadHeaderTimeout is configured.
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func NewSlowloris(id string, _ gosec.Config) (gosec.Rule, []ast.Node) {
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return &slowloris{
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MetaData: issue.MetaData{
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ID: id,
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What: "Potential Slowloris Attack because ReadHeaderTimeout is not configured in the http.Server",
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Confidence: issue.Low,
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Severity: issue.Medium,
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},
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}, []ast.Node{(*ast.CompositeLit)(nil)}
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}
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