1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
package main
import (
"encoding/csv"
"flag"
"log"
"os"
"path/filepath"
"strconv"
"strings"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"github.com/Ullaakut/nmap"
"onap.local/sslendpoints/ports"
)
const (
ipv4AddrType = "ipv4"
xfailComma = ' '
xfailComment = '#'
xfailFields = 2
)
var (
kubeconfig *string
xfailName *string
)
func main() {
if home := os.Getenv("HOME"); home != "" {
kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
} else {
kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
}
xfailName = flag.String("xfail", "", "(optional) absolute path to the expected failures file")
flag.Parse()
xfails := make(map[uint16]string)
if *xfailName != "" {
xfailFile, err := os.Open(*xfailName)
if err != nil {
log.Printf("Unable to open expected failures file: %v", err)
log.Println("All non-SSL NodePorts will be reported")
}
defer xfailFile.Close()
r := csv.NewReader(xfailFile)
r.Comma = xfailComma
r.Comment = xfailComment
r.FieldsPerRecord = xfailFields
xfailData, err := r.ReadAll()
if err != nil {
log.Printf("Unable to read expected failures file: %v", err)
log.Println("All non-SSL NodePorts will be reported")
}
var ok bool
xfails, ok = ports.ConvertNodePorts(xfailData)
if !ok {
log.Println("No usable data in expected failures file")
log.Println("All non-SSL NodePorts will be reported")
}
}
// use the current context in kubeconfig
config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
log.Panicf("Unable to build cluster config: %v", err)
}
// create the clientset
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
log.Panicf("Unable to build client: %v", err)
}
// get list of nodes to extract addresses for running scan
nodes, err := clientset.CoreV1().Nodes().List(metav1.ListOptions{})
if err != nil {
log.Panicf("Unable to get list of nodes: %v", err)
}
// filter out addresses for running scan
addresses, ok := ports.FilterIPAddresses(nodes)
if !ok {
log.Println("There are no IP addresses to run scan")
os.Exit(0)
}
// get list of services to extract nodeport information
services, err := clientset.CoreV1().Services("").List(metav1.ListOptions{})
if err != nil {
log.Panicf("Unable to get list of services: %v", err)
}
// filter out nodeports with corresponding services from service list
nodeports, ok := ports.FilterNodePorts(services)
if !ok {
log.Println("There are no NodePorts in the cluster")
os.Exit(0)
}
// filter out expected failures here before running the scan
ports.FilterXFailNodePorts(xfails, nodeports)
// extract ports for running the scan
var ports []string
for port := range nodeports {
ports = append(ports, strconv.Itoa(int(port)))
}
// run nmap on the first address found for given cluster [1] filtering out SSL-tunelled ports
// [1] https://kubernetes.io/docs/concepts/services-networking/service/#nodeport
// "Each node proxies that port (the same port number on every Node) into your Service."
scanner, err := nmap.NewScanner(
nmap.WithTargets(addresses[0]),
nmap.WithPorts(ports...),
nmap.WithServiceInfo(),
nmap.WithTimingTemplate(nmap.TimingAggressive),
nmap.WithFilterPort(func(p nmap.Port) bool {
if p.Service.Tunnel == "ssl" {
return false
}
if strings.HasPrefix(p.State.State, "closed") {
return false
}
if strings.HasPrefix(p.State.State, "filtered") {
return false
}
return true
}),
)
if err != nil {
log.Panicf("Unable to create nmap scanner: %v", err)
}
result, _, err := scanner.Run()
if err != nil {
log.Panicf("Scan failed: %v", err)
}
// scan was run on a single host
if len(result.Hosts) < 1 {
log.Panicln("No host information in scan results")
}
// host address in the results might be ipv4 or mac
for _, address := range result.Hosts[0].Addresses {
if address.AddrType == ipv4AddrType {
log.Printf("Host %s\n", address)
}
}
log.Printf("PORT\tSERVICE")
for _, port := range result.Hosts[0].Ports {
log.Printf("%d\t%s\n", port.ID, nodeports[port.ID])
}
// report non-SSL services and their number
log.Printf("There are %d non-SSL NodePorts in the cluster\n", len(result.Hosts[0].Ports))
os.Exit(len(result.Hosts[0].Ports))
}
|
