mirror of
https://github.com/securego/gosec.git
synced 2024-12-26 12:35:52 +00:00
87 lines
2.7 KiB
Go
87 lines
2.7 KiB
Go
// (c) Copyright 2016 Hewlett Packard Enterprise Development LP
|
|
//
|
|
// 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 rules
|
|
|
|
import (
|
|
"go/ast"
|
|
"regexp"
|
|
|
|
"github.com/securego/gosec/v2"
|
|
)
|
|
|
|
type badTempFile struct {
|
|
gosec.MetaData
|
|
calls gosec.CallList
|
|
args *regexp.Regexp
|
|
argCalls gosec.CallList
|
|
nestedCalls gosec.CallList
|
|
}
|
|
|
|
func (t *badTempFile) ID() string {
|
|
return t.MetaData.ID
|
|
}
|
|
|
|
func (t *badTempFile) findTempDirArgs(n ast.Node, c *gosec.Context, suspect ast.Node) *gosec.Issue {
|
|
if s, e := gosec.GetString(suspect); e == nil {
|
|
if t.args.MatchString(s) {
|
|
return gosec.NewIssue(c, n, t.ID(), t.What, t.Severity, t.Confidence)
|
|
}
|
|
return nil
|
|
}
|
|
if ce := t.argCalls.ContainsPkgCallExpr(suspect, c, false); ce != nil {
|
|
return gosec.NewIssue(c, n, t.ID(), t.What, t.Severity, t.Confidence)
|
|
}
|
|
if be, ok := suspect.(*ast.BinaryExpr); ok {
|
|
if ops := gosec.GetBinaryExprOperands(be); len(ops) != 0 {
|
|
return t.findTempDirArgs(n, c, ops[0])
|
|
}
|
|
return nil
|
|
}
|
|
if ce := t.nestedCalls.ContainsPkgCallExpr(suspect, c, false); ce != nil {
|
|
return t.findTempDirArgs(n, c, ce.Args[0])
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (t *badTempFile) Match(n ast.Node, c *gosec.Context) (gi *gosec.Issue, err error) {
|
|
if node := t.calls.ContainsPkgCallExpr(n, c, false); node != nil {
|
|
return t.findTempDirArgs(n, c, node.Args[0]), nil
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
// NewBadTempFile detects direct writes to predictable path in temporary directory
|
|
func NewBadTempFile(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
|
|
calls := gosec.NewCallList()
|
|
calls.Add("io/ioutil", "WriteFile")
|
|
calls.AddAll("os", "Create", "WriteFile")
|
|
argCalls := gosec.NewCallList()
|
|
argCalls.Add("os", "TempDir")
|
|
nestedCalls := gosec.NewCallList()
|
|
nestedCalls.Add("path", "Join")
|
|
nestedCalls.Add("path/filepath", "Join")
|
|
return &badTempFile{
|
|
calls: calls,
|
|
args: regexp.MustCompile(`^(/(usr|var))?/tmp(/.*)?$`),
|
|
argCalls: argCalls,
|
|
nestedCalls: nestedCalls,
|
|
MetaData: gosec.MetaData{
|
|
ID: id,
|
|
Severity: gosec.Medium,
|
|
Confidence: gosec.High,
|
|
What: "File creation in shared tmp directory without using ioutil.Tempfile",
|
|
},
|
|
}, []ast.Node{(*ast.CallExpr)(nil)}
|
|
}
|