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channel_http.py
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channel_http.py
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import simplejson
import datetime
import os
import hashlib
import cgi
from twisted.web import server, resource
from twisted.application import internet
from twisted.web.server import Site, GzipEncoderFactory
from twisted.web.resource import Resource, EncodingResourceWrapper, ForbiddenResource
from twisted.web.util import Redirect, redirectTo
from twisted.python import log
from jinja2 import Environment, FileSystemLoader
import subprocess
from tokens import Canarytoken
from canarydrop import Canarydrop
from channel import InputChannel
from queries import get_canarydrop, add_canarydrop_hit, add_additional_info_to_hit
from constants import INPUT_CHANNEL_HTTP
from settings import TOKEN_RETURN, MAX_UPLOAD_SIZE, WEB_IMAGE_UPLOAD_PATH
env = Environment(loader=FileSystemLoader('templates'))
class CanarytokenPage(resource.Resource, InputChannel):
CHANNEL = INPUT_CHANNEL_HTTP
isLeaf = True
GIF = '\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x00\x00\xff\xff\xff'+\
'\xff\xff\xff\x21\xf9\x04\x01\x0a\x00\x01\x00\x2c\x00\x00\x00\x00'+\
'\x01\x00\x01\x00\x00\x02\x02\x4c\x01\x00\x3b' #1x1 GIF
def getChild(self, name, request):
if name == '':
return self
return Resource.getChild(self, name, request)
def render_GET(self, request):
#A GET request to a token URL can trigger one of a few responses:
# 1. Check if link has been clicked on (rather than loaded from an
# <img>) by looking at the Accept header, then:
# 1a. If browser security if enabled, serve that page and stop.
# 1b. If fortune in enabled, serve a fortune and stop.
# 2. Otherwise we'll serve an image:
# 2a. If a custom image is attached to the canarydrop, serve that and stop.
# 2b. Serve our default 1x1 gif
request.setHeader("Server", "Apache")
try:
token = Canarytoken(value=request.path)
canarydrop = Canarydrop(**get_canarydrop(canarytoken=token.value()))
if request.args.get('ts_key',[None])[0]:
canarydrop._drop['hit_time'] = request.args.get('ts_key', [None])[0]
else:
canarydrop._drop['hit_time'] = datetime.datetime.utcnow().strftime("%s.%f")
useragent = request.getHeader('User-Agent')
src_ip = request.getHeader('x-forwarded-for')
#location and refere are for cloned sites
location = request.args.get('l', [None])[0]
referer = request.args.get('r', [None])[0]
self.dispatch(canarydrop=canarydrop, src_ip=src_ip,
useragent=useragent, location=location,
referer=referer)
if 'redirect_url' in canarydrop._drop and canarydrop._drop['redirect_url']:
# if fast redirect
if canarydrop._drop['type'] == 'fast_redirect':
return redirectTo(canarydrop._drop['redirect_url'], request)
#template = env.get_template('browser_scanner.html')
#return template.render(key=canarydrop._drop['hit_time'],
# canarytoken=token.value()).encode('utf8')
elif canarydrop._drop['type'] == 'slow_redirect':
template = env.get_template('browser_scanner.html')
return template.render(key=canarydrop._drop['hit_time'],
canarytoken=token.value(),
redirect_url=canarydrop._drop['redirect_url']).encode('utf8')
if request.getHeader('Accept') and "text/html" in request.getHeader('Accept'):
if canarydrop['browser_scanner_enabled']:
template = env.get_template('browser_scanner.html')
return template.render(key=canarydrop._drop['hit_time'],
canarytoken=token.value(),
redirect_url='').encode('utf8')
elif TOKEN_RETURN == 'fortune':
try:
fortune = subprocess.check_output('/usr/games/fortune')
template = env.get_template('fortune.html')
return template.render(fortune=fortune).encode('utf8')
except Exception as e:
log.err('Could not get a fortune: {e}'.format(e=e))
if canarydrop['web_image_enabled'] and os.path.exists(canarydrop['web_image_path']):
mimetype = "image/"+canarydrop['web_image_path'][-3:]
with open(canarydrop['web_image_path'], "r") as f:
contents = f.read()
request.setHeader("Content-Type", mimetype)
return contents
except Exception as e:
log.err('Error in render GET: {error}'.format(error=e))
request.setHeader("Content-Type", "image/gif")
return self.GIF
def render_POST(self, request):
try:
key = request.args['key'][0]
token = Canarytoken(value=request.path)
canarydrop = Canarydrop(**get_canarydrop(canarytoken=token.value()))
#if key and token args are present, we are either:
# -posting browser info
# -getting an aws trigger (key == aws_s3)
#store the info and don't re-render
if key and token:
if key == 'aws_s3':
try:
canarydrop._drop['hit_time'] = datetime.datetime.utcnow().strftime("%s.%f")
src_ip = request.args['RemoteIP'][0]
additional_info = {'AWS Log Data': {k:v for k,v in request.args.iteritems() if k not in ['key','src_ip']}}
self.dispatch(canarydrop=canarydrop, src_ip=src_ip,
additional_info=additional_info)
except Exception as e:
log.err('Error in s3 post: {error}'.format(error=e))
elif 'secretkeeper_photo' in request.args:
log.err('Saving secretkeeper_photo')
try:
fields = cgi.FieldStorage(
fp = request.content,
headers = request.getAllHeaders(),
environ = {'REQUEST_METHOD':'POST',
'CONTENT_TYPE': request.getAllHeaders()['content-type'],
}
)#hacky way to parse out file contents and filenames
filename = fields['secretkeeper_photo'].filename
filebody = fields['secretkeeper_photo'].value
if len(filebody) > MAX_UPLOAD_SIZE:
raise Exception('File too large')
r = hashlib.md5(os.urandom(32)).hexdigest()
filepath = os.path.join(WEB_IMAGE_UPLOAD_PATH,
r[:2],
r[2:])+'.png'
if not os.path.exists(os.path.dirname(filepath)):
try:
os.makedirs(os.path.dirname(filepath))
except OSError as exc: # Guard against race condition
if exc.errno != errno.EEXIST:
raise
with open(filepath, "w") as f:
f.write(filebody)
canarydrop.add_additional_info_to_hit(hit_time=key, additional_info={'secretkeeper_photo':filepath})
except Exception as e:
log.err('Error in secretkeeper_photo post: {error}'.format(error=e))
else:
additional_info = {k:v for k,v in request.args.iteritems() if k not in ['key','canarytoken','name']}
canarydrop.add_additional_info_to_hit(hit_time=key,additional_info={request.args['name'][0]:additional_info})
return 'success'
else:
return self.render_GET(request)
except Exception as e:
return self.render_GET(request)
def format_additional_data(self, **kwargs):
log.msg('%r' % kwargs)
additional_report = ''
if kwargs.has_key('src_ip') and kwargs['src_ip']:
additional_report += 'Source IP: {ip}'.format(ip=kwargs['src_ip'])
if kwargs.has_key('useragent') and kwargs['useragent']:
additional_report += '\nUser-agent: {useragent}'.format(useragent=kwargs['useragent'])
if kwargs.has_key('location') and kwargs['location']:
additional_report += '\nCloned site is at: {location}'.format(location=kwargs['location'])
if kwargs.has_key('referer') and kwargs['referer']:
additional_report += '\nReferring site: {referer}'.format(referer=kwargs['referer'])
return additional_report
def init(self, switchboard=None):
InputChannel.__init__(self, switchboard=switchboard, name=self.CHANNEL)
class ChannelHTTP():
def __init__(self, port=80, switchboard=None):
self.port = port
canarytoken_page = CanarytokenPage()
canarytoken_page.init(switchboard=switchboard)
wrapped = EncodingResourceWrapper(canarytoken_page, [GzipEncoderFactory()])
site = server.Site(wrapped)
self.service = internet.TCPServer(self.port, site)
return None