mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2026-07-11 11:03:15 +00:00
230 lines
7.9 KiB
Python
230 lines
7.9 KiB
Python
#!/usr/bin/env python
|
|
|
|
"""
|
|
Copyright (c) 2006-2026 sqlmap developers (https://sqlmap.org)
|
|
See the file 'LICENSE' for copying permission
|
|
"""
|
|
|
|
# Native, dependency-free WebSocket client (RFC 6455), replacing the 'websocket-client' third-party
|
|
# library. Covers exactly what sqlmap needs: the client handshake, masked text framing, wss (TLS) and
|
|
# the recv/timeout surface. It also removes the long-standing ambiguity with the unrelated 'websocket'
|
|
# PyPI package (both expose a top-level 'websocket' module). Pure standard library, Python 2.7 / 3.x.
|
|
|
|
import base64
|
|
import hashlib
|
|
import os
|
|
import socket
|
|
import ssl
|
|
import struct
|
|
|
|
from lib.core.convert import getBytes
|
|
from lib.core.convert import getText
|
|
from thirdparty.six.moves import urllib as _urllib
|
|
|
|
_GUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11" # RFC 6455 magic value for the accept key
|
|
|
|
OPCODE_CONTINUATION = 0x0
|
|
OPCODE_TEXT = 0x1
|
|
OPCODE_BINARY = 0x2
|
|
OPCODE_CLOSE = 0x8
|
|
OPCODE_PING = 0x9
|
|
OPCODE_PONG = 0xA
|
|
|
|
class WebSocketException(Exception):
|
|
pass
|
|
|
|
class WebSocketTimeoutException(WebSocketException):
|
|
pass
|
|
|
|
class WebSocketConnectionClosedException(WebSocketException):
|
|
pass
|
|
|
|
class WebSocket(object):
|
|
"""
|
|
Minimal RFC 6455 client exposing the websocket-client subset used by sqlmap: settimeout(), connect(),
|
|
send(), recv(), close(), the handshake .status and getheaders()
|
|
"""
|
|
|
|
def __init__(self):
|
|
self.sock = None
|
|
self.status = None
|
|
self._headers = {}
|
|
self._timeout = None
|
|
self._buffer = b""
|
|
self._closed = False
|
|
|
|
def settimeout(self, timeout):
|
|
self._timeout = timeout
|
|
if self.sock is not None:
|
|
self.sock.settimeout(timeout)
|
|
|
|
def connect(self, url, header=None, cookie=None):
|
|
parts = _urllib.parse.urlsplit(url)
|
|
secure = parts.scheme == "wss"
|
|
host = parts.hostname
|
|
port = parts.port or (443 if secure else 80)
|
|
resource = parts.path or "/"
|
|
if parts.query:
|
|
resource += "?%s" % parts.query
|
|
|
|
self.sock = socket.create_connection((host, port), timeout=self._timeout)
|
|
if secure:
|
|
self.sock = ssl._create_unverified_context().wrap_socket(self.sock, server_hostname=host)
|
|
self.sock.settimeout(self._timeout)
|
|
|
|
hostport = "[%s]" % host if ":" in host else host # bracket IPv6 literals
|
|
if port not in (80, 443):
|
|
hostport = "%s:%d" % (hostport, port)
|
|
|
|
key = getText(base64.b64encode(os.urandom(16)))
|
|
lines = ["GET %s HTTP/1.1" % resource,
|
|
"Host: %s" % hostport,
|
|
"Upgrade: websocket",
|
|
"Connection: Upgrade",
|
|
"Sec-WebSocket-Key: %s" % key,
|
|
"Sec-WebSocket-Version: 13"]
|
|
for _ in (header or ()):
|
|
lines.append(_)
|
|
if cookie:
|
|
lines.append("Cookie: %s" % cookie)
|
|
lines.extend(("", ""))
|
|
self.sock.sendall(getBytes("\r\n".join(lines)))
|
|
|
|
self._readHandshake(key)
|
|
|
|
def _readHandshake(self, key):
|
|
while b"\r\n\r\n" not in self._buffer:
|
|
chunk = self._recvSome()
|
|
if not chunk:
|
|
raise WebSocketException("incomplete WebSocket handshake response")
|
|
self._buffer += chunk
|
|
|
|
head, _, self._buffer = self._buffer.partition(b"\r\n\r\n")
|
|
lines = getText(head).split("\r\n")
|
|
|
|
try:
|
|
self.status = int(lines[0].split(" ", 2)[1])
|
|
except (IndexError, ValueError):
|
|
raise WebSocketException("malformed WebSocket handshake response")
|
|
|
|
for line in lines[1:]:
|
|
name, _, value = line.partition(":")
|
|
self._headers[name.strip().lower()] = value.strip()
|
|
|
|
if self.status != 101:
|
|
raise WebSocketException("Handshake status %d" % self.status) # 'Handshake status' is matched in connect.py
|
|
|
|
accept = getText(self._headers.get("sec-websocket-accept", ""))
|
|
expected = getText(base64.b64encode(hashlib.sha1(getBytes(key + _GUID)).digest()))
|
|
if accept != expected:
|
|
raise WebSocketException("invalid 'Sec-WebSocket-Accept' in handshake response")
|
|
|
|
def getheaders(self):
|
|
return dict(self._headers)
|
|
|
|
def send(self, payload, opcode=OPCODE_TEXT):
|
|
self._sendFrame(getBytes(payload), opcode)
|
|
|
|
def _sendFrame(self, data, opcode):
|
|
length = len(data)
|
|
frame = bytearray()
|
|
frame.append(0x80 | opcode) # FIN set, single (unfragmented) frame
|
|
|
|
if length < 126:
|
|
frame.append(0x80 | length) # client frames must set the mask bit
|
|
elif length < 65536:
|
|
frame.append(0x80 | 126)
|
|
frame += struct.pack("!H", length)
|
|
else:
|
|
frame.append(0x80 | 127)
|
|
frame += struct.pack("!Q", length)
|
|
|
|
mask = bytearray(os.urandom(4))
|
|
frame += mask
|
|
payload = bytearray(data)
|
|
for i in range(length):
|
|
payload[i] ^= mask[i % 4]
|
|
frame += payload
|
|
|
|
try:
|
|
self.sock.sendall(bytes(frame))
|
|
except socket.timeout:
|
|
raise WebSocketTimeoutException("timed out while sending data")
|
|
except ssl.SSLError as ex:
|
|
if "timed out" in str(ex).lower():
|
|
raise WebSocketTimeoutException("timed out while sending data")
|
|
raise
|
|
|
|
def recv(self):
|
|
data = bytearray()
|
|
while True:
|
|
fin, opcode, payload = self._recvFrame()
|
|
if opcode == OPCODE_CLOSE:
|
|
self._closed = True
|
|
raise WebSocketConnectionClosedException("WebSocket connection closed")
|
|
elif opcode == OPCODE_PING:
|
|
self._sendFrame(bytes(payload), OPCODE_PONG)
|
|
continue
|
|
elif opcode == OPCODE_PONG:
|
|
continue
|
|
|
|
data += payload
|
|
if fin:
|
|
break
|
|
|
|
return getText(bytes(data))
|
|
|
|
def _recvFrame(self):
|
|
header = bytearray(self._readStrict(2))
|
|
fin = (header[0] >> 7) & 1
|
|
opcode = header[0] & 0x0F
|
|
masked = (header[1] >> 7) & 1
|
|
length = header[1] & 0x7F
|
|
|
|
if length == 126:
|
|
length = struct.unpack("!H", self._readStrict(2))[0]
|
|
elif length == 127:
|
|
length = struct.unpack("!Q", self._readStrict(8))[0]
|
|
|
|
mask = bytearray(self._readStrict(4)) if masked else None
|
|
payload = bytearray(self._readStrict(length))
|
|
if mask is not None: # servers must not mask, but unmask defensively
|
|
for i in range(length):
|
|
payload[i] ^= mask[i % 4]
|
|
|
|
return fin, opcode, payload
|
|
|
|
def _readStrict(self, count):
|
|
while len(self._buffer) < count:
|
|
chunk = self._recvSome()
|
|
if not chunk:
|
|
raise WebSocketConnectionClosedException("WebSocket connection closed")
|
|
self._buffer += chunk
|
|
|
|
result, self._buffer = self._buffer[:count], self._buffer[count:]
|
|
return result
|
|
|
|
def _recvSome(self):
|
|
try:
|
|
return self.sock.recv(8192)
|
|
except socket.timeout:
|
|
raise WebSocketTimeoutException("timed out while receiving data")
|
|
except ssl.SSLError as ex:
|
|
# Python 2 raises ssl.SSLError('The read operation timed out') instead of socket.timeout on a
|
|
# TLS read timeout - which is exactly sqlmap's normal "read frames until timeout" path over wss
|
|
if "timed out" in str(ex).lower():
|
|
raise WebSocketTimeoutException("timed out while receiving data")
|
|
raise
|
|
|
|
def close(self):
|
|
if self.sock is not None:
|
|
try:
|
|
if not self._closed:
|
|
self._sendFrame(struct.pack("!H", 1000), OPCODE_CLOSE) # normal closure
|
|
except (socket.error, WebSocketException):
|
|
pass
|
|
try:
|
|
self.sock.close()
|
|
except socket.error:
|
|
pass
|
|
self.sock = None
|