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July 20, 2020 19:42
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Simple script to extract hostnames from cert transparency logs at crt.sh
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#!/usr/bin/env python3 | |
import sys | |
import argparse | |
import requests | |
from lxml import html | |
import urllib3 | |
# Nobody wants to see SSL warnings :-P | |
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) | |
def doSleep(timing): | |
if timing == 0: | |
time.sleep(random.randrange(90,120)) | |
elif timing == 1: | |
time.sleep(random.randrange(60,90)) | |
elif timing == 2: | |
time.sleep(random.randrange(30,60)) | |
elif timing == 3: | |
time.sleep(random.randrange(10,20)) | |
elif timing == 4: | |
time.sleep(random.randrange(5,10)) | |
def getHostnames(domain): | |
url = 'https://crt.sh/?q={0}'.format(domain) | |
headers = {'User-Agent': useragent, | |
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', | |
'Accept-Language': 'en-US,en;q=0.5', | |
'Accept-Encoding': 'gzip, deflate', | |
'Referer': 'https://crt.sh/'} | |
try: | |
r = requests.get(url,headers=headers,proxies=proxies,verify=False) | |
if r.status_code == requests.codes.ok: | |
tree = html.fromstring(r.text) | |
crtsh_hostnames = [x.lower() for x in tree.xpath('//td[@class="outer"]/table/tr/td[5]/text()')] | |
# Clean up the list for valid hostnames | |
hostnames = [] | |
for hostname in crtsh_hostnames: | |
if hostname not in hostnames and '*' not in hostname: | |
hostnames.append(hostname) | |
# Print hostnames | |
for hostname in hostnames: | |
print(hostname) | |
except Exception as e: | |
print('[!] An exception occurred while querying crt.sh: {0}'.format(e)) | |
if __name__ == "__main__": | |
parser = argparse.ArgumentParser( | |
description='Extracts hosts from certificate transparency logs at cert.sh', | |
epilog = ''' | |
Examples: | |
./{0} -d google.com | |
./{0} -f domains.txt'''.format(sys.argv[0]), | |
formatter_class=argparse.RawDescriptionHelpFormatter) | |
parser.add_argument('-d','--domain', help='Domain to query certificate transparency logs for', required=False, default=None, type=str, dest='domain') | |
parser.add_argument('-f','--file', help='File containing domains to query certificate transparency logs for', required=False, default=None, type=str, dest='file') | |
parser.add_argument('-t','--timing', help='Modifies request timing to avoid getting banned for being a bot. Slowest(0) = 90-120 seconds, Default(3) = 10-20 seconds, Fastest(5) = no delay', required=False, default=3, type=int, choices=range(0,6), dest='timing') | |
parser.add_argument('-p', '--proxy', help='Proxy example: http://127.0.0.1:8080', required=False, default=None, type=str, dest='proxy') | |
parser.add_argument('-u', '--useragent', help='User agent string to make requests with', required=False, default='Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)', type=str, dest='useragent') | |
args = parser.parse_args() | |
# Global Variables | |
useragent = args.useragent | |
if args.proxy: | |
proxies = {'http': args.proxy, 'https': args.proxy} | |
else: | |
proxies = None | |
if args.file: | |
try: | |
with open(args.file) as f: | |
domains = [line.rstrip('\n') for line in f] | |
except Exception as e: | |
print('[!] Trouble opening file {0}\n\n{1}\n\n'.format(args.file,e)) | |
exit(1) | |
elif args.domain: | |
domains = [args.domain] | |
else: | |
print('[!] Either a domain (-d, --domain) or file containing domains (-f, --file) is required!') | |
exit(1) | |
# Main logic | |
for domain in domains: | |
getHostnames(domain) |
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