56 lines
1.6 KiB
Go
56 lines
1.6 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"
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)
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type weakRand struct {
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gosec.MetaData
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funcNames []string
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packagePath string
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}
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func (w *weakRand) ID() string {
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return w.MetaData.ID
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}
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func (w *weakRand) Match(n ast.Node, c *gosec.Context) (*gosec.Issue, error) {
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for _, funcName := range w.funcNames {
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if _, matched := gosec.MatchCallByPackage(n, c, w.packagePath, funcName); matched {
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return gosec.NewIssue(c, n, w.ID(), w.What, w.Severity, w.Confidence), nil
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}
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}
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return nil, nil
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}
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// NewWeakRandCheck detects the use of random number generator that isn't cryptographically secure
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func NewWeakRandCheck(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
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return &weakRand{
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funcNames: []string{"Read", "Int"},
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packagePath: "math/rand",
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MetaData: gosec.MetaData{
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ID: id,
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Severity: gosec.High,
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Confidence: gosec.Medium,
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What: "Use of weak random number generator (math/rand instead of crypto/rand)",
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},
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}, []ast.Node{(*ast.CallExpr)(nil)}
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}
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