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|
import contextlib
import sys
import os
import itertools
import hashlib
import Queue
import random
import select
import time
import threading
import OpenSSL.crypto
import six
from netlib import tcp, http, certutils, websockets, socks
from netlib.exceptions import HttpException, TcpDisconnect, TcpTimeout, TlsException, TcpException, \
NetlibException
from netlib.http import http1, http2
import language.http
import language.websockets
from . import utils, log
import logging
from netlib.tutils import treq
logging.getLogger("hpack").setLevel(logging.WARNING)
class PathocError(Exception):
pass
class SSLInfo(object):
def __init__(self, certchain, cipher, alp):
self.certchain, self.cipher, self.alp = certchain, cipher, alp
def __str__(self):
parts = [
"Application Layer Protocol: %s" % self.alp,
"Cipher: %s, %s bit, %s" % self.cipher,
"SSL certificate chain:"
]
for n,i in enumerate(self.certchain):
parts.append(" Certificate [%s]" % n)
parts.append("\tSubject: ")
for cn in i.get_subject().get_components():
parts.append("\t\t%s=%s" % cn)
parts.append("\tIssuer: ")
for cn in i.get_issuer().get_components():
parts.append("\t\t%s=%s" % cn)
parts.extend(
[
"\tVersion: %s" % i.get_version(),
"\tValidity: %s - %s" % (
i.get_notBefore(), i.get_notAfter()
),
"\tSerial: %s" % i.get_serial_number(),
"\tAlgorithm: %s" % i.get_signature_algorithm()
]
)
pk = i.get_pubkey()
types = {
OpenSSL.crypto.TYPE_RSA: "RSA",
OpenSSL.crypto.TYPE_DSA: "DSA"
}
t = types.get(pk.type(), "Uknown")
parts.append("\tPubkey: %s bit %s" % (pk.bits(), t))
s = certutils.SSLCert(i)
if s.altnames:
parts.append("\tSANs: %s" % " ".join(s.altnames))
return "\n".join(parts)
class WebsocketFrameReader(threading.Thread):
def __init__(
self,
rfile,
logfp,
showresp,
hexdump,
ws_read_limit,
timeout
):
threading.Thread.__init__(self)
self.timeout = timeout
self.ws_read_limit = ws_read_limit
self.logfp = logfp
self.showresp = showresp
self.hexdump = hexdump
self.rfile = rfile
self.terminate = Queue.Queue()
self.frames_queue = Queue.Queue()
self.logger = log.ConnectionLogger(
self.logfp,
self.hexdump,
rfile if showresp else None,
None
)
@contextlib.contextmanager
def terminator(self):
yield
self.frames_queue.put(None)
def run(self):
starttime = time.time()
with self.terminator():
while True:
if self.ws_read_limit == 0:
return
r, _, _ = select.select([self.rfile], [], [], 0.05)
delta = time.time() - starttime
if not r and self.timeout and delta > self.timeout:
return
try:
self.terminate.get_nowait()
return
except Queue.Empty:
pass
for rfile in r:
with self.logger.ctx() as log:
try:
frm = websockets.Frame.from_file(self.rfile)
except TcpDisconnect:
return
self.frames_queue.put(frm)
log("<< %s" % frm.header.human_readable())
if self.ws_read_limit is not None:
self.ws_read_limit -= 1
starttime = time.time()
class Pathoc(tcp.TCPClient):
def __init__(
self,
address,
# SSL
ssl=None,
sni=None,
ssl_version=tcp.SSL_DEFAULT_METHOD,
ssl_options=tcp.SSL_DEFAULT_OPTIONS,
clientcert=None,
ciphers=None,
# HTTP/2
use_http2=False,
http2_skip_connection_preface=False,
http2_framedump=False,
# Websockets
ws_read_limit=None,
# Network
timeout=None,
# Output control
showreq=False,
showresp=False,
explain=False,
hexdump=False,
ignorecodes=(),
ignoretimeout=False,
showsummary=False,
fp=sys.stdout
):
"""
spec: A request specification
showreq: Print requests
showresp: Print responses
explain: Print request explanation
showssl: Print info on SSL connection
hexdump: When printing requests or responses, use hex dump output
showsummary: Show a summary of requests
ignorecodes: Sequence of return codes to ignore
"""
tcp.TCPClient.__init__(self, address)
self.ssl, self.sni = ssl, sni
self.clientcert = clientcert
self.ssl_version = ssl_version
self.ssl_options = ssl_options
self.ciphers = ciphers
self.sslinfo = None
self.use_http2 = use_http2
self.http2_skip_connection_preface = http2_skip_connection_preface
self.http2_framedump = http2_framedump
self.ws_read_limit = ws_read_limit
self.timeout = timeout
self.showreq = showreq
self.showresp = showresp
self.explain = explain
self.hexdump = hexdump
self.ignorecodes = ignorecodes
self.ignoretimeout = ignoretimeout
self.showsummary = showsummary
self.fp = fp
self.ws_framereader = None
if self.use_http2:
if not tcp.HAS_ALPN: # pragma: nocover
log.write_raw(
self.fp,
"HTTP/2 requires ALPN support. "
"Please use OpenSSL >= 1.0.2. "
"Pathoc might not be working as expected without ALPN."
)
self.protocol = http2.HTTP2Protocol(self, dump_frames=self.http2_framedump)
else:
self.protocol = http1
self.settings = language.Settings(
is_client=True,
staticdir=os.getcwd(),
unconstrained_file_access=True,
request_host=self.address.host,
protocol=self.protocol,
)
def http_connect(self, connect_to):
self.wfile.write(
'CONNECT %s:%s HTTP/1.1\r\n' % tuple(connect_to) +
'\r\n'
)
self.wfile.flush()
try:
resp = self.protocol.read_response(self.rfile, treq(method="CONNECT"))
if resp.status_code != 200:
raise HttpException("Unexpected status code: %s" % resp.status_code)
except HttpException as e:
six.reraise(PathocError, PathocError(
"Proxy CONNECT failed: %s" % repr(e)
))
def socks_connect(self, connect_to):
try:
client_greet = socks.ClientGreeting(socks.VERSION.SOCKS5, [socks.METHOD.NO_AUTHENTICATION_REQUIRED])
client_greet.to_file(self.wfile)
self.wfile.flush()
server_greet = socks.ServerGreeting.from_file(self.rfile)
server_greet.assert_socks5()
if server_greet.method != socks.METHOD.NO_AUTHENTICATION_REQUIRED:
raise socks.SocksError(
socks.METHOD.NO_ACCEPTABLE_METHODS,
"pathoc only supports SOCKS without authentication"
)
connect_request = socks.Message(
socks.VERSION.SOCKS5,
socks.CMD.CONNECT,
socks.ATYP.DOMAINNAME,
tcp.Address.wrap(connect_to)
)
connect_request.to_file(self.wfile)
self.wfile.flush()
connect_reply = socks.Message.from_file(self.rfile)
connect_reply.assert_socks5()
if connect_reply.msg != socks.REP.SUCCEEDED:
raise socks.SocksError(
connect_reply.msg,
"SOCKS server error"
)
except (socks.SocksError, TcpDisconnect) as e:
raise PathocError(str(e))
def connect(self, connect_to=None, showssl=False, fp=sys.stdout):
"""
connect_to: A (host, port) tuple, which will be connected to with
an HTTP CONNECT request.
"""
if self.use_http2 and not self.ssl:
raise NotImplementedError("HTTP2 without SSL is not supported.")
tcp.TCPClient.connect(self)
if connect_to:
self.http_connect(connect_to)
self.sslinfo = None
if self.ssl:
try:
alpn_protos = [b'http/1.1']
if self.use_http2:
alpn_protos.append(b'h2')
self.convert_to_ssl(
sni=self.sni,
cert=self.clientcert,
method=self.ssl_version,
options=self.ssl_options,
cipher_list=self.ciphers,
alpn_protos=alpn_protos
)
except TlsException as v:
raise PathocError(str(v))
self.sslinfo = SSLInfo(
self.connection.get_peer_cert_chain(),
self.get_current_cipher(),
self.get_alpn_proto_negotiated()
)
if showssl:
print >> fp, str(self.sslinfo)
if self.use_http2:
self.protocol.check_alpn()
if not self.http2_skip_connection_preface:
self.protocol.perform_client_connection_preface()
if self.timeout:
self.settimeout(self.timeout)
def stop(self):
if self.ws_framereader:
self.ws_framereader.terminate.put(None)
def wait(self, timeout=0.01, finish=True):
"""
A generator that yields frames until Pathoc terminates.
timeout: If specified None may be yielded instead if timeout is
reached. If timeout is None, wait forever. If timeout is 0, return
immedately if nothing is on the queue.
finish: If true, consume messages until the reader shuts down.
Otherwise, return None on timeout.
"""
if self.ws_framereader:
while True:
try:
frm = self.ws_framereader.frames_queue.get(
timeout=timeout,
block=True if timeout != 0 else False
)
except Queue.Empty:
if finish:
continue
else:
return
if frm is None:
self.ws_framereader.join()
return
yield frm
def websocket_send_frame(self, r):
"""
Sends a single websocket frame.
"""
logger = log.ConnectionLogger(
self.fp,
self.hexdump,
None,
self.wfile if self.showreq else None,
)
with logger.ctx() as lg:
lg(">> %s" % r)
language.serve(r, self.wfile, self.settings)
self.wfile.flush()
def websocket_start(self, r):
"""
Performs an HTTP request, and attempts to drop into websocket
connection.
"""
resp = self.http(r)
if resp.status_code == 101:
self.ws_framereader = WebsocketFrameReader(
self.rfile,
self.fp,
self.showresp,
self.hexdump,
self.ws_read_limit,
self.timeout
)
self.ws_framereader.start()
return resp
def http(self, r):
"""
Performs a single request.
r: A language.http.Request object, or a string representing one
request.
Returns Response if we have a non-ignored response.
May raise a NetlibException
"""
logger = log.ConnectionLogger(
self.fp,
self.hexdump,
self.rfile if self.showresp else None,
self.wfile if self.showreq else None,
)
with logger.ctx() as lg:
lg(">> %s" % r)
resp, req = None, None
try:
req = language.serve(r, self.wfile, self.settings)
self.wfile.flush()
resp = self.protocol.read_response(self.rfile, treq(method=req["method"].encode()))
resp.sslinfo = self.sslinfo
except HttpException as v:
lg("Invalid server response: %s" % v)
raise
except TcpTimeout:
if self.ignoretimeout:
lg("Timeout (ignored)")
return None
lg("Timeout")
raise
finally:
if resp:
lg("<< %s %s: %s bytes" % (
resp.status_code, utils.xrepr(resp.msg), len(resp.content)
))
if resp.status_code in self.ignorecodes:
lg.suppress()
return resp
def request(self, r):
"""
Performs a single request.
r: A language.message.Messsage object, or a string representing
one.
Returns Response if we have a non-ignored response.
May raise a NetlibException
"""
if isinstance(r, basestring):
r = language.parse_pathoc(r, self.use_http2).next()
if isinstance(r, language.http.Request):
if r.ws:
return self.websocket_start(r)
else:
return self.http(r)
elif isinstance(r, language.websockets.WebsocketFrame):
self.websocket_send_frame(r)
elif isinstance(r, language.http2.Request):
return self.http(r)
# elif isinstance(r, language.http2.Frame):
# TODO: do something
def main(args): # pragma: nocover
memo = set([])
trycount = 0
p = None
try:
cnt = 0
while True:
if cnt == args.repeat and args.repeat != 0:
break
if args.wait and cnt != 0:
time.sleep(args.wait)
cnt += 1
playlist = itertools.chain(*args.requests)
if args.random:
playlist = random.choice(args.requests)
p = Pathoc(
(args.host, args.port),
ssl=args.ssl,
sni=args.sni,
ssl_version=args.ssl_version,
ssl_options=args.ssl_options,
clientcert=args.clientcert,
ciphers=args.ciphers,
use_http2=args.use_http2,
http2_skip_connection_preface=args.http2_skip_connection_preface,
http2_framedump=args.http2_framedump,
showreq=args.showreq,
showresp=args.showresp,
explain=args.explain,
hexdump=args.hexdump,
ignorecodes=args.ignorecodes,
timeout=args.timeout,
ignoretimeout=args.ignoretimeout,
showsummary=True
)
trycount = 0
try:
p.connect(args.connect_to, args.showssl)
except TcpException as v:
print >> sys.stderr, str(v)
continue
except PathocError as v:
print >> sys.stderr, str(v)
sys.exit(1)
for spec in playlist:
if args.explain or args.memo:
spec = spec.freeze(p.settings)
if args.memo:
h = hashlib.sha256(spec.spec()).digest()
if h not in memo:
trycount = 0
memo.add(h)
else:
trycount += 1
if trycount > args.memolimit:
print >> sys.stderr, "Memo limit exceeded..."
return
else:
continue
try:
ret = p.request(spec)
if ret and args.oneshot:
return
# We consume the queue when we can, so it doesn't build up.
for i_ in p.wait(timeout=0, finish=False):
pass
except NetlibException:
break
for i_ in p.wait(timeout=0.01, finish=True):
pass
except KeyboardInterrupt:
pass
if p:
p.stop()
|