gopkg.in/alecthomas/gometalinter.v3@v3.0.0/_linters/src/github.com/securego/gosec/rules/bind.go (about) 1 // (c) Copyright 2016 Hewlett Packard Enterprise Development LP 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package rules 16 17 import ( 18 "go/ast" 19 "regexp" 20 21 "github.com/securego/gosec" 22 ) 23 24 // Looks for net.Listen("0.0.0.0") or net.Listen(":8080") 25 type bindsToAllNetworkInterfaces struct { 26 gosec.MetaData 27 calls gosec.CallList 28 pattern *regexp.Regexp 29 } 30 31 func (r *bindsToAllNetworkInterfaces) ID() string { 32 return r.MetaData.ID 33 } 34 35 func (r *bindsToAllNetworkInterfaces) Match(n ast.Node, c *gosec.Context) (*gosec.Issue, error) { 36 callExpr := r.calls.ContainsCallExpr(n, c) 37 if callExpr == nil { 38 return nil, nil 39 } 40 if arg, err := gosec.GetString(callExpr.Args[1]); err == nil { 41 if r.pattern.MatchString(arg) { 42 return gosec.NewIssue(c, n, r.ID(), r.What, r.Severity, r.Confidence), nil 43 } 44 } 45 return nil, nil 46 } 47 48 // NewBindsToAllNetworkInterfaces detects socket connections that are setup to 49 // listen on all network interfaces. 50 func NewBindsToAllNetworkInterfaces(id string, conf gosec.Config) (gosec.Rule, []ast.Node) { 51 calls := gosec.NewCallList() 52 calls.Add("net", "Listen") 53 calls.Add("crypto/tls", "Listen") 54 return &bindsToAllNetworkInterfaces{ 55 calls: calls, 56 pattern: regexp.MustCompile(`^(0.0.0.0|:).*$`), 57 MetaData: gosec.MetaData{ 58 ID: id, 59 Severity: gosec.Medium, 60 Confidence: gosec.High, 61 What: "Binds to all network interfaces", 62 }, 63 }, []ast.Node{(*ast.CallExpr)(nil)} 64 }