mirror of
https://github.com/securego/gosec.git
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78 lines
2.2 KiB
Go
78 lines
2.2 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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gas "github.com/HewlettPackard/gas/core"
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"go/ast"
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"reflect"
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"regexp"
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)
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type ImportsWeakCryptography struct {
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gas.MetaData
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pattern *regexp.Regexp
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}
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func (r *ImportsWeakCryptography) Match(n ast.Node, c *gas.Context) (gi *gas.Issue, err error) {
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a := reflect.TypeOf(&ast.ImportSpec{})
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b := reflect.TypeOf(&ast.BasicLit{})
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if node := gas.SimpleSelect(n, a, b); node != nil {
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if str, _ := gas.GetString(node); r.pattern.MatchString(str) {
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return gas.NewIssue(c, n, r.What, r.Severity, r.Confidence), nil
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}
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}
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return
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}
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// Imports crypto/md5, crypto/des crypto/rc4
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func NewImportsWeakCryptography() (r gas.Rule, n ast.Node) {
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r = &ImportsWeakCryptography{
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pattern: regexp.MustCompile("crypto/md5|crypto/des|crypto/rc4"),
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MetaData: gas.MetaData{
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Severity: gas.Medium,
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Confidence: gas.High,
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What: "Import of weak cryptographic primitive",
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},
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}
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n = (*ast.ImportSpec)(nil)
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return
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}
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type UsesWeakCryptography struct {
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gas.MetaData
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pattern *regexp.Regexp
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}
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func (r *UsesWeakCryptography) Match(n ast.Node, c *gas.Context) (*gas.Issue, error) {
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if node := gas.MatchCall(n, r.pattern); node != nil {
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return gas.NewIssue(c, n, r.What, r.Severity, r.Confidence), nil
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}
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return nil, nil
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}
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// Uses des.* md5.* or rc4.*
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func NewUsesWeakCryptography() (r gas.Rule, n ast.Node) {
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r = &UsesWeakCryptography{
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pattern: regexp.MustCompile("des.NewCipher|des.NewTripleDESCipher|md5.New|md5.Sum|rc4.NewCipher"),
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MetaData: gas.MetaData{
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Severity: gas.Medium,
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Confidence: gas.High,
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What: "Use of weak cryptographic primitive",
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},
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}
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n = (*ast.CallExpr)(nil)
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return
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}
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