Rename file for consistency

Signed-off-by: Cosmin Cojocar <cosmin.cojocar@gmx.ch>

rules/blocklist.go

@@ -0,0 +1,94 @@
+// (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"
+	"strings"
+
+	"github.com/securego/gosec/v2"
+)
+
+type blocklistedImport struct {
+	gosec.MetaData
+	Blocklisted map[string]string
+}
+
+func unquote(original string) string {
+	copy := strings.TrimSpace(original)
+	copy = strings.TrimLeft(copy, `"`)
+	return strings.TrimRight(copy, `"`)
+}
+
+func (r *blocklistedImport) ID() string {
+	return r.MetaData.ID
+}
+
+func (r *blocklistedImport) Match(n ast.Node, c *gosec.Context) (*gosec.Issue, error) {
+	if node, ok := n.(*ast.ImportSpec); ok {
+		if description, ok := r.Blocklisted[unquote(node.Path.Value)]; ok {
+			return gosec.NewIssue(c, node, r.ID(), description, r.Severity, r.Confidence), nil
+		}
+	}
+	return nil, nil
+}
+
+// NewBlocklistedImports reports when a blocklisted import is being used.
+// Typically when a deprecated technology is being used.
+func NewBlocklistedImports(id string, conf gosec.Config, blocklist map[string]string) (gosec.Rule, []ast.Node) {
+	return &blocklistedImport{
+		MetaData: gosec.MetaData{
+			ID:         id,
+			Severity:   gosec.Medium,
+			Confidence: gosec.High,
+		},
+		Blocklisted: blocklist,
+	}, []ast.Node{(*ast.ImportSpec)(nil)}
+}
+
+// NewBlocklistedImportMD5 fails if MD5 is imported
+func NewBlocklistedImportMD5(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
+	return NewBlocklistedImports(id, conf, map[string]string{
+		"crypto/md5": "Blocklisted import crypto/md5: weak cryptographic primitive",
+	})
+}
+
+// NewBlocklistedImportDES fails if DES is imported
+func NewBlocklistedImportDES(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
+	return NewBlocklistedImports(id, conf, map[string]string{
+		"crypto/des": "Blocklisted import crypto/des: weak cryptographic primitive",
+	})
+}
+
+// NewBlocklistedImportRC4 fails if DES is imported
+func NewBlocklistedImportRC4(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
+	return NewBlocklistedImports(id, conf, map[string]string{
+		"crypto/rc4": "Blocklisted import crypto/rc4: weak cryptographic primitive",
+	})
+}
+
+// NewBlocklistedImportCGI fails if CGI is imported
+func NewBlocklistedImportCGI(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
+	return NewBlocklistedImports(id, conf, map[string]string{
+		"net/http/cgi": "Blocklisted import net/http/cgi: Go versions < 1.6.3 are vulnerable to Httpoxy attack: (CVE-2016-5386)",
+	})
+}
+
+// NewBlocklistedImportSHA1 fails if SHA1 is imported
+func NewBlocklistedImportSHA1(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
+	return NewBlocklistedImports(id, conf, map[string]string{
+		"crypto/sha1": "Blocklisted import crypto/sha1: weak cryptographic primitive",
+	})
+}