Initial public release

rules/fileperms.go

@@ -0,0 +1,67 @@
+// (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 (
+	"fmt"
+	gas "github.com/HewlettPackard/gas/core"
+	"go/ast"
+	"regexp"
+)
+
+type FilePermissions struct {
+	gas.MetaData
+	pattern *regexp.Regexp
+	mode    int64
+}
+
+func (r *FilePermissions) Match(n ast.Node, c *gas.Context) (*gas.Issue, error) {
+	if node := gas.MatchCall(n, r.pattern); node != nil {
+		if val, err := gas.GetInt(node.Args[1]); err == nil && val > r.mode {
+			return gas.NewIssue(c, n, r.What, r.Severity, r.Confidence), nil
+		}
+	}
+	return nil, nil
+}
+
+func NewChmodPerms() (r gas.Rule, n ast.Node) {
+	mode := 0600
+	r = &FilePermissions{
+		pattern: regexp.MustCompile(`^os.Chmod$`),
+		mode:    (int64)(mode),
+		MetaData: gas.MetaData{
+			Severity:   gas.Medium,
+			Confidence: gas.High,
+			What:       fmt.Sprintf("Expect chmod permissions to be %#o or less", mode),
+		},
+	}
+	n = (*ast.CallExpr)(nil)
+	return
+}
+
+func NewMkdirPerms() (r gas.Rule, n ast.Node) {
+	mode := 0700
+	r = &FilePermissions{
+		pattern: regexp.MustCompile(`^(os.Mkdir|os.MkdirAll)$`),
+		mode:    (int64)(mode),
+		MetaData: gas.MetaData{
+			Severity:   gas.Medium,
+			Confidence: gas.High,
+			What:       fmt.Sprintf("Expect directory permissions to be %#o or less", mode),
+		},
+	}
+	n = (*ast.CallExpr)(nil)
+	return
+}