mirror of
https://github.com/aquasecurity/kube-bench.git
synced 2024-12-23 23:18:33 +00:00
169 lines
3.3 KiB
Go
169 lines
3.3 KiB
Go
// Copyright © 2017 Aqua Security Software Ltd. <info@aquasec.com>
|
|
//
|
|
// 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 check
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// test:
|
|
// flag: OPTION
|
|
// set: (true|false)
|
|
// compare:
|
|
// op: (eq|gt|gte|lt|lte|has)
|
|
// value: val
|
|
|
|
type binOp string
|
|
|
|
const (
|
|
and binOp = "and"
|
|
or = "or"
|
|
)
|
|
|
|
type testItem struct {
|
|
Flag string
|
|
Output string
|
|
Value string
|
|
Set bool
|
|
Compare compare
|
|
}
|
|
|
|
type compare struct {
|
|
Op string
|
|
Value string
|
|
}
|
|
|
|
func (t *testItem) execute(s string) (result bool) {
|
|
result = false
|
|
match := strings.Contains(s, t.Flag)
|
|
|
|
if t.Set {
|
|
var flagVal string
|
|
isset := match
|
|
|
|
if isset && t.Compare.Op != "" {
|
|
// Expects flags in the form;
|
|
// --flag=somevalue
|
|
// --flag
|
|
// somevalue
|
|
//pttn := `(` + t.Flag + `)(=)*([^\s,]*) *`
|
|
pttn := `(` + t.Flag + `)(=)*([^\s]*) *`
|
|
flagRe := regexp.MustCompile(pttn)
|
|
vals := flagRe.FindStringSubmatch(s)
|
|
|
|
if len(vals) > 0 {
|
|
if vals[3] != "" {
|
|
flagVal = vals[3]
|
|
} else {
|
|
flagVal = vals[1]
|
|
}
|
|
} else {
|
|
fmt.Fprintf(os.Stderr, "invalid flag in testitem definition")
|
|
os.Exit(1)
|
|
}
|
|
|
|
switch t.Compare.Op {
|
|
case "eq":
|
|
result = flagVal == t.Compare.Value
|
|
|
|
case "noteq":
|
|
result = !(flagVal == t.Compare.Value)
|
|
|
|
case "gt":
|
|
a, b := toNumeric(flagVal, t.Compare.Value)
|
|
result = a > b
|
|
|
|
case "gte":
|
|
a, b := toNumeric(flagVal, t.Compare.Value)
|
|
result = a >= b
|
|
|
|
case "lt":
|
|
a, b := toNumeric(flagVal, t.Compare.Value)
|
|
result = a < b
|
|
|
|
case "lte":
|
|
a, b := toNumeric(flagVal, t.Compare.Value)
|
|
result = a <= b
|
|
|
|
case "has":
|
|
result = strings.Contains(flagVal, t.Compare.Value)
|
|
|
|
case "nothave":
|
|
result = !strings.Contains(flagVal, t.Compare.Value)
|
|
}
|
|
} else {
|
|
result = isset
|
|
}
|
|
|
|
} else {
|
|
notset := !match
|
|
result = notset
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
type tests struct {
|
|
TestItems []*testItem `yaml:"test_items"`
|
|
BinOp binOp `yaml:"bin_op"`
|
|
}
|
|
|
|
func (ts *tests) execute(s string) (result bool) {
|
|
res := make([]bool, len(ts.TestItems))
|
|
|
|
for i, t := range ts.TestItems {
|
|
res[i] = t.execute(s)
|
|
}
|
|
|
|
// If no binary operation is specified, default to AND
|
|
switch ts.BinOp {
|
|
default:
|
|
fmt.Fprintf(os.Stderr, "unknown binary operator for tests %s\n", ts.BinOp)
|
|
os.Exit(1)
|
|
case and, "":
|
|
result = true
|
|
for i := range res {
|
|
result = result && res[i]
|
|
}
|
|
case or:
|
|
result = false
|
|
for i := range res {
|
|
result = result || res[i]
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func toNumeric(a, b string) (c, d int) {
|
|
var err error
|
|
c, err = strconv.Atoi(a)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "error converting %s: %s\n", a, err)
|
|
os.Exit(1)
|
|
}
|
|
d, err = strconv.Atoi(b)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "error converting %s: %s\n", b, err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
return c, d
|
|
}
|