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subdomains.go
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subdomains.go
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package scanning
/*
References:
https://github.com/famasoon/crtsh
https://github.com/projectdiscovery/subfinder
*/
import (
"github.com/D3Ext/maldev/slices"
"encoding/json"
"net/http"
"io/ioutil"
"fmt"
"time"
"strings"
)
type CTLogs []*CTLog
type CTLog struct { // Custom struct for crt.sh api
IssuerCaID int `json:"issuer_ca_id"`
IssuerName string `json:"issuer_name"`
NameValue string `json:"name_value"`
MinCertID int `json:"min_cert_id"`
MinEntryTimestamp string `json:"min_entry_timestamp"`
NotBefore string `json:"not_before"`
NotAfter string `json:"not_after"`
}
type AlienvaultResponse struct {
PassiveDNS []struct {
Hostname string `json:"hostname"`
} `json:"passive_dns"`
}
// Define API urls
const crtsh_url string = "https://crt.sh/?output=json&CN="
const hackertarget_url string = "https://api.hackertarget.com/hostsearch/?q="
const alienvault_url string = "https://otx.alienvault.com/api/v1/indicators/domain/"
func GetCrt(dom string) ([]string, error) {
var crt_subdomains []string
// Use crt.sh API
req := http.Client{
Timeout: 30 * time.Second,
}
res, err := req.Get(crtsh_url + dom)
if err != nil {
return []string{""}, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
err = fmt.Errorf("crt.sh is down or seems to be slow")
return []string{""}, err
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return []string{""}, err
}
var logs CTLogs
err = json.Unmarshal(body, &logs)
if err != nil {
return []string{""}, err
}
for _, c := range logs {
crt_subdomains = append(crt_subdomains, c.NameValue)
}
return crt_subdomains, nil
}
func GetHackerTarget(dom string) ([]string, error) {
var hackertarget_subdomains []string
// Use HackerTarget API
req := http.Client{
Timeout: 30 * time.Second,
}
res, err := req.Get(hackertarget_url + dom)
if err != nil {
return []string{""}, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
err = fmt.Errorf("HackerTarget is down or seems to be slow")
return []string{""}, err
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return []string{""}, err
}
for _, entry := range strings.Split(string(body), "\n") {
hackertarget_subdomains = append(hackertarget_subdomains, strings.Split(entry, ",")[0])
}
return hackertarget_subdomains, nil
}
func GetAlienVault(dom string) ([]string, error) {
var alienvault_subdomains []string
// Use HackerTarget API
req := http.Client{
Timeout: 30 * time.Second,
}
res, err := req.Get(alienvault_url + dom + "/passive_dns")
if err != nil {
return []string{""}, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
err = fmt.Errorf("AlienVault is down or seems to be slow")
return []string{""}, err
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
return []string{""}, err
}
var alien AlienvaultResponse
err = json.Unmarshal(body, &alien)
if err != nil {
return []string{""}, err
}
for _, entry := range alien.PassiveDNS {
alienvault_subdomains = append(alienvault_subdomains, entry.Hostname)
}
return alienvault_subdomains, nil
}
func GetAllSubdomains(dom string) ([]string, error) {
var final_subdomains []string
// Get all subdomains
subdomains1, err := GetCrt(dom)
if err != nil {
return []string{""}, err
}
subdomains2, err := GetHackerTarget(dom)
if err != nil {
return []string{""}, err
}
subdomains3, err := GetAlienVault(dom)
if err != nil {
return []string{""}, err
}
for _, entry := range subdomains1 { // Add all subdomains from Crt.sh
final_subdomains = append(final_subdomains, entry)
}
for _, entry := range subdomains2 { // Add all subdomains from HackerTarget
final_subdomains = append(final_subdomains, entry)
}
for _, entry := range subdomains3 { // Add subdomains from AlienVault
final_subdomains = append(final_subdomains, entry)
}
// Finally remove duplicates and return subdomains
final_subdomains = slices.RemoveDuplicatesStr(final_subdomains)
return final_subdomains, nil
}