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Merge branch 'rand-pkg-helper' of git://github.com/tam7t/gas into tam7t-rand-pkg-helper

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This commit is contained in:
Grant Murphy 2016-11-07 20:03:51 -08:00
commit e0db3f404a
1 changed files with 4 additions and 34 deletions
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38
rules/rand.go
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@ -16,50 +16,20 @@ package rules
import (
"go/ast"
"go/types"
"regexp"
gas "github.com/GoASTScanner/gas/core"
)
type WeakRand struct {
gas.MetaData
pattern *regexp.Regexp
funcName string
packagePath string
}
func matchFuncCall(n ast.Node, c *gas.Context) (types.Object, *ast.Ident) {
call, ok := n.(*ast.CallExpr)
if !ok {
return nil, nil
}
sel, ok := call.Fun.(*ast.SelectorExpr)
if !ok {
return nil, nil
}
id, ok := sel.X.(*ast.Ident)
if !ok {
return nil, nil
}
return c.Info.ObjectOf(id), sel.Sel
}
func (w *WeakRand) Match(n ast.Node, c *gas.Context) (*gas.Issue, error) {
o, f := matchFuncCall(n, c)
node, _ := gas.MatchCallByPackage(n, c, w.packagePath, w.funcName)
if o == nil || f == nil {
return nil, nil
}
pkg, ok := o.(*types.PkgName)
if !ok {
return nil, nil
}
if pkg.Imported().Path() == w.packagePath && w.pattern.MatchString(f.String()) {
if node != nil {
return gas.NewIssue(c, n, w.What, w.Severity, w.Confidence), nil
}
@ -68,7 +38,7 @@ func (w *WeakRand) Match(n ast.Node, c *gas.Context) (*gas.Issue, error) {
func NewWeakRandCheck(conf map[string]interface{}) (r gas.Rule, n ast.Node) {
r = &WeakRand{
pattern: regexp.MustCompile(`^Read$`),
funcName: "Read",
packagePath: "math/rand",
MetaData: gas.MetaData{
Severity: gas.High,