mirror of
https://github.com/securego/gosec.git
synced 2024-11-05 11:35:51 +00:00
63 lines
2 KiB
Go
63 lines
2 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"
|
|
|
|
"github.com/securego/gosec/v2"
|
|
"github.com/securego/gosec/v2/issue"
|
|
)
|
|
|
|
type weakRand struct {
|
|
issue.MetaData
|
|
blocklist map[string][]string
|
|
}
|
|
|
|
func (w *weakRand) ID() string {
|
|
return w.MetaData.ID
|
|
}
|
|
|
|
func (w *weakRand) Match(n ast.Node, c *gosec.Context) (*issue.Issue, error) {
|
|
for pkg, funcs := range w.blocklist {
|
|
if _, matched := gosec.MatchCallByPackage(n, c, pkg, funcs...); matched {
|
|
return c.NewIssue(n, w.ID(), w.What, w.Severity, w.Confidence), nil
|
|
}
|
|
}
|
|
|
|
return nil, nil
|
|
}
|
|
|
|
// NewWeakRandCheck detects the use of random number generator that isn't cryptographically secure
|
|
func NewWeakRandCheck(id string, _ gosec.Config) (gosec.Rule, []ast.Node) {
|
|
calls := make(map[string][]string)
|
|
calls["math/rand"] = []string{
|
|
"New", "Read", "Float32", "Float64", "Int", "Int31", "Int31n",
|
|
"Int63", "Int63n", "Intn", "NormFloat64", "Uint32", "Uint64",
|
|
}
|
|
calls["math/rand/v2"] = []string{
|
|
"New", "Float32", "Float64", "Int", "Int32", "Int32N",
|
|
"Int64", "Int64N", "IntN", "N", "NormFloat64", "Uint32", "Uint32N", "Uint64", "Uint64N", "UintN",
|
|
}
|
|
return &weakRand{
|
|
blocklist: calls,
|
|
MetaData: issue.MetaData{
|
|
ID: id,
|
|
Severity: issue.High,
|
|
Confidence: issue.Medium,
|
|
What: "Use of weak random number generator (math/rand or math/rand/v2 instead of crypto/rand)",
|
|
},
|
|
}, []ast.Node{(*ast.CallExpr)(nil)}
|
|
}
|