95 lines
3.2 KiB
Go
95 lines
3.2 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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"strings"
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"github.com/securego/gosec"
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)
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type blacklistedImport struct {
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gosec.MetaData
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Blacklisted map[string]string
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}
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func unquote(original string) string {
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copy := strings.TrimSpace(original)
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copy = strings.TrimLeft(copy, `"`)
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return strings.TrimRight(copy, `"`)
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}
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func (r *blacklistedImport) ID() string {
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return r.MetaData.ID
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}
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func (r *blacklistedImport) Match(n ast.Node, c *gosec.Context) (*gosec.Issue, error) {
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if node, ok := n.(*ast.ImportSpec); ok {
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if description, ok := r.Blacklisted[unquote(node.Path.Value)]; ok {
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return gosec.NewIssue(c, node, r.ID(), description, r.Severity, r.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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// NewBlacklistedImports reports when a blacklisted import is being used.
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// Typically when a deprecated technology is being used.
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func NewBlacklistedImports(id string, conf gosec.Config, blacklist map[string]string) (gosec.Rule, []ast.Node) {
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return &blacklistedImport{
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MetaData: gosec.MetaData{
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ID: id,
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Severity: gosec.Medium,
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Confidence: gosec.High,
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},
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Blacklisted: blacklist,
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}, []ast.Node{(*ast.ImportSpec)(nil)}
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}
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// NewBlacklistedImportMD5 fails if MD5 is imported
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func NewBlacklistedImportMD5(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
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return NewBlacklistedImports(id, conf, map[string]string{
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"crypto/md5": "Blacklisted import crypto/md5: weak cryptographic primitive",
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})
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}
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// NewBlacklistedImportDES fails if DES is imported
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func NewBlacklistedImportDES(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
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return NewBlacklistedImports(id, conf, map[string]string{
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"crypto/des": "Blacklisted import crypto/des: weak cryptographic primitive",
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})
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}
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// NewBlacklistedImportRC4 fails if DES is imported
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func NewBlacklistedImportRC4(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
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return NewBlacklistedImports(id, conf, map[string]string{
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"crypto/rc4": "Blacklisted import crypto/rc4: weak cryptographic primitive",
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})
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}
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// NewBlacklistedImportCGI fails if CGI is imported
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func NewBlacklistedImportCGI(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
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return NewBlacklistedImports(id, conf, map[string]string{
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"net/http/cgi": "Blacklisted import net/http/cgi: Go versions < 1.6.3 are vulnerable to Httpoxy attack: (CVE-2016-5386)",
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})
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}
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// NewBlacklistedImportSHA1 fails if SHA1 is imported
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func NewBlacklistedImportSHA1(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
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return NewBlacklistedImports(id, conf, map[string]string{
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"crypto/sha1": "Blacklisted import crypto/sha1: weak cryptographic primitive",
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})
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}
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