dnomd343
/
shadowsocksr
mirror of https://github.com/dnomd343/shadowsocksr
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

remove auth_sha1, auth_sha1_v2, verify_simple, auth_simple, verify_sha1 

remove TCP over UDP
add UDP part of auth_chain_a
dev
破娃酱 8 years ago
parent
db6629a130
commit
774134ffad
8 changed files with 87 additions and 1505 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 4
      db_transfer.py
  2. 7
      shadowsocks/obfs.py
  3. 450
      shadowsocks/obfsplugin/auth.py
  4. 82
      shadowsocks/obfsplugin/auth_chain.py
  5. 2
      shadowsocks/obfsplugin/plain.py
  6. 206
      shadowsocks/obfsplugin/verify.py
  7. 2
      shadowsocks/tcprelay.py
  8. 837
      shadowsocks/udprelay.py

4
db_transfer.py
View File

@ -6,7 +6,7 @@ import time
import sys import sys
from server_pool import ServerPool from server_pool import ServerPool
import traceback import traceback
from shadowsocks import common, shell, lru_cache from shadowsocks import common, shell, lru_cache, obfs
from configloader import load_config, get_config from configloader import load_config, get_config
import importloader import importloader
@ -123,7 +123,7 @@ class TransferBase(object):
if allow: if allow:
allow_users[port] = passwd allow_users[port] = passwd
if 'protocol' in cfg and 'protocol_param' in cfg and common.to_str(cfg['protocol']) in ['auth_aes128_md5', 'auth_aes128_sha1']: if 'protocol' in cfg and 'protocol_param' in cfg and common.to_str(cfg['protocol']) in obfs.mu_protocol():
if '#' in common.to_str(cfg['protocol_param']): if '#' in common.to_str(cfg['protocol_param']):
mu_servers[port] = passwd mu_servers[port] = passwd
del allow_users[port] del allow_users[port]

7
shadowsocks/obfs.py
View File

@ -34,6 +34,9 @@ method_supported.update(verify.obfs_map)
method_supported.update(auth.obfs_map) method_supported.update(auth.obfs_map)
method_supported.update(auth_chain.obfs_map) method_supported.update(auth_chain.obfs_map)
def mu_protocol():
return ["auth_aes128_md5", "auth_aes128_sha1", "auth_chain_a"]
class server_info(object): class server_info(object):
def __init__(self, data): def __init__(self, data):
self.data = data self.data = data
@ -99,8 +102,8 @@ class obfs(object):
def client_udp_post_decrypt(self, buf): def client_udp_post_decrypt(self, buf):
return self.obfs.client_udp_post_decrypt(buf) return self.obfs.client_udp_post_decrypt(buf)
def server_udp_pre_encrypt(self, buf): def server_udp_pre_encrypt(self, buf, uid):
return self.obfs.server_udp_pre_encrypt(buf) return self.obfs.server_udp_pre_encrypt(buf, uid)
def server_udp_post_decrypt(self, buf): def server_udp_post_decrypt(self, buf):
return self.obfs.server_udp_post_decrypt(buf) return self.obfs.server_udp_post_decrypt(buf)

450
shadowsocks/obfsplugin/auth.py
View File

@ -37,12 +37,6 @@ from shadowsocks import common, lru_cache, encrypt
from shadowsocks.obfsplugin import plain from shadowsocks.obfsplugin import plain
from shadowsocks.common import to_bytes, to_str, ord, chr from shadowsocks.common import to_bytes, to_str, ord, chr
def create_auth_sha1(method):
return auth_sha1(method)
def create_auth_sha1_v2(method):
return auth_sha1_v2(method)
def create_auth_sha1_v4(method): def create_auth_sha1_v4(method):
return auth_sha1_v4(method) return auth_sha1_v4(method)
@ -53,10 +47,6 @@ def create_auth_aes128_sha1(method):
return auth_aes128_sha1(method, hashlib.sha1) return auth_aes128_sha1(method, hashlib.sha1)
obfs_map = { obfs_map = {
'auth_sha1': (create_auth_sha1,),
'auth_sha1_compatible': (create_auth_sha1,),
'auth_sha1_v2': (create_auth_sha1_v2,),
'auth_sha1_v2_compatible': (create_auth_sha1_v2,),
'auth_sha1_v4': (create_auth_sha1_v4,), 'auth_sha1_v4': (create_auth_sha1_v4,),
'auth_sha1_v4_compatible': (create_auth_sha1_v4,), 'auth_sha1_v4_compatible': (create_auth_sha1_v4,),
'auth_aes128_md5': (create_auth_aes128_md5,), 'auth_aes128_md5': (create_auth_aes128_md5,),
@ -69,10 +59,6 @@ def match_begin(str1, str2):
return True return True
return False return False
class obfs_verify_data(object):
def __init__(self):
pass
class auth_base(plain.plain): class auth_base(plain.plain):
def __init__(self, method): def __init__(self, method):
super(auth_base, self).__init__(method) super(auth_base, self).__init__(method)
@ -153,239 +139,6 @@ class client_queue(object):
self.front += 1 self.front += 1
return True return True
class obfs_auth_data(object):
def __init__(self):
self.client_id = {}
self.startup_time = int(time.time() - 30) & 0xFFFFFFFF
self.local_client_id = b''
self.connection_id = 0
self.set_max_client(64) # max active client count
def update(self, client_id, connection_id):
if client_id in self.client_id:
self.client_id[client_id].update()
def set_max_client(self, max_client):
self.max_client = max_client
self.max_buffer = max(self.max_client * 2, 256)
def insert(self, client_id, connection_id):
if client_id not in self.client_id or not self.client_id[client_id].enable:
active = 0
for c_id in self.client_id:
if self.client_id[c_id].is_active():
active += 1
if active >= self.max_client:
logging.warn('obfs auth: max active clients exceeded')
return False
if len(self.client_id) < self.max_client:
if client_id not in self.client_id:
self.client_id[client_id] = client_queue(connection_id)
else:
self.client_id[client_id].re_enable(connection_id)
return self.client_id[client_id].insert(connection_id)
keys = self.client_id.keys()
random.shuffle(keys)
for c_id in keys:
if not self.client_id[c_id].is_active() and self.client_id[c_id].enable:
if len(self.client_id) >= self.max_buffer:
del self.client_id[c_id]
else:
self.client_id[c_id].enable = False
if client_id not in self.client_id:
self.client_id[client_id] = client_queue(connection_id)
else:
self.client_id[client_id].re_enable(connection_id)
return self.client_id[client_id].insert(connection_id)
logging.warn('obfs auth: no inactive client [assert]')
return False
else:
return self.client_id[client_id].insert(connection_id)
class auth_sha1(auth_base):
def __init__(self, method):
super(auth_sha1, self).__init__(method)
self.recv_buf = b''
self.unit_len = 8000
self.decrypt_packet_num = 0
self.raw_trans = False
self.has_sent_header = False
self.has_recv_header = False
self.client_id = 0
self.connection_id = 0
self.max_time_dif = 60 * 60 # time dif (second) setting
self.no_compatible_method = 'auth_sha1'
def init_data(self):
return obfs_auth_data()
def set_server_info(self, server_info):
self.server_info = server_info
try:
max_client = int(server_info.protocol_param)
except:
max_client = 64
self.server_info.data.set_max_client(max_client)
def pack_data(self, buf):
rnd_data = os.urandom(common.ord(os.urandom(1)[0]) % 16)
data = common.chr(len(rnd_data) + 1) + rnd_data + buf
data = struct.pack('>H', len(data) + 6) + data
adler32 = zlib.adler32(data) & 0xFFFFFFFF
data += struct.pack('<I', adler32)
return data
def pack_auth_data(self, buf):
if len(buf) == 0:
return b''
rnd_data = os.urandom(common.ord(os.urandom(1)[0]) % 128)
data = common.chr(len(rnd_data) + 1) + rnd_data + buf
data = struct.pack('>H', len(data) + 16) + data
crc = binascii.crc32(self.server_info.key) & 0xFFFFFFFF
data = struct.pack('<I', crc) + data
data += hmac.new(self.server_info.iv + self.server_info.key, data, hashlib.sha1).digest()[:10]
return data
def auth_data(self):
utc_time = int(time.time()) & 0xFFFFFFFF
if self.server_info.data.connection_id > 0xFF000000:
self.server_info.data.local_client_id = b''
if not self.server_info.data.local_client_id:
self.server_info.data.local_client_id = os.urandom(4)
logging.debug("local_client_id %s" % (binascii.hexlify(self.server_info.data.local_client_id),))
self.server_info.data.connection_id = struct.unpack('<I', os.urandom(4))[0] & 0xFFFFFF
self.server_info.data.connection_id += 1
return b''.join([struct.pack('<I', utc_time),
self.server_info.data.local_client_id,
struct.pack('<I', self.server_info.data.connection_id)])
def client_pre_encrypt(self, buf):
ret = b''
if not self.has_sent_header:
head_size = self.get_head_size(buf, 30)
datalen = min(len(buf), random.randint(0, 31) + head_size)
ret += self.pack_auth_data(self.auth_data() + buf[:datalen])
buf = buf[datalen:]
self.has_sent_header = True
while len(buf) > self.unit_len:
ret += self.pack_data(buf[:self.unit_len])
buf = buf[self.unit_len:]
ret += self.pack_data(buf)
return ret
def client_post_decrypt(self, buf):
if self.raw_trans:
return buf
self.recv_buf += buf
out_buf = b''
while len(self.recv_buf) > 2:
length = struct.unpack('>H', self.recv_buf[:2])[0]
if length >= 8192 or length < 7:
self.raw_trans = True
self.recv_buf = b''
raise Exception('client_post_decrypt data error')
if length > len(self.recv_buf):
break
if struct.pack('<I', zlib.adler32(self.recv_buf[:length - 4]) & 0xFFFFFFFF) != self.recv_buf[length - 4:length]:
self.raw_trans = True
self.recv_buf = b''
raise Exception('client_post_decrypt data uncorrect checksum')
pos = common.ord(self.recv_buf[2]) + 2
out_buf += self.recv_buf[pos:length - 4]
self.recv_buf = self.recv_buf[length:]
if out_buf:
self.decrypt_packet_num += 1
return out_buf
def server_pre_encrypt(self, buf):
if self.raw_trans:
return buf
ret = b''
while len(buf) > self.unit_len:
ret += self.pack_data(buf[:self.unit_len])
buf = buf[self.unit_len:]
ret += self.pack_data(buf)
return ret
def server_post_decrypt(self, buf):
if self.raw_trans:
return (buf, False)
self.recv_buf += buf
out_buf = b''
if not self.has_recv_header:
if len(self.recv_buf) < 6:
return (b'', False)
crc = struct.pack('<I', binascii.crc32(self.server_info.key) & 0xFFFFFFFF)
if crc != self.recv_buf[:4]:
return self.not_match_return(self.recv_buf)
length = struct.unpack('>H', self.recv_buf[4:6])[0]
if length > 2048:
return self.not_match_return(self.recv_buf)
if length > len(self.recv_buf):
return (b'', False)
sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, self.recv_buf[:length - 10], hashlib.sha1).digest()[:10]
if sha1data != self.recv_buf[length - 10:length]:
logging.error('auth_sha1 data uncorrect auth HMAC-SHA1')
return self.not_match_return(self.recv_buf)
pos = common.ord(self.recv_buf[6]) + 6
out_buf = self.recv_buf[pos:length - 10]
if len(out_buf) < 12:
logging.info('auth_sha1: too short, data %s' % (binascii.hexlify(self.recv_buf),))
return self.not_match_return(self.recv_buf)
utc_time = struct.unpack('<I', out_buf[:4])[0]
client_id = struct.unpack('<I', out_buf[4:8])[0]
connection_id = struct.unpack('<I', out_buf[8:12])[0]
time_dif = common.int32(utc_time - (int(time.time()) & 0xffffffff))
if time_dif < -self.max_time_dif or time_dif > self.max_time_dif \
or common.int32(utc_time - self.server_info.data.startup_time) < -self.max_time_dif / 2:
logging.info('auth_sha1: wrong timestamp, time_dif %d, data %s' % (time_dif, binascii.hexlify(out_buf),))
return self.not_match_return(self.recv_buf)
elif self.server_info.data.insert(client_id, connection_id):
self.has_recv_header = True
out_buf = out_buf[12:]
self.client_id = client_id
self.connection_id = connection_id
else:
logging.info('auth_sha1: auth fail, data %s' % (binascii.hexlify(out_buf),))
return self.not_match_return(self.recv_buf)
self.recv_buf = self.recv_buf[length:]
self.has_recv_header = True
while len(self.recv_buf) > 2:
length = struct.unpack('>H', self.recv_buf[:2])[0]
if length >= 8192 or length < 7:
self.raw_trans = True
self.recv_buf = b''
if self.decrypt_packet_num == 0:
logging.info('auth_sha1: over size')
return (b'E'*2048, False)
else:
raise Exception('server_post_decrype data error')
if length > len(self.recv_buf):
break
if struct.pack('<I', zlib.adler32(self.recv_buf[:length - 4]) & 0xFFFFFFFF) != self.recv_buf[length - 4:length]:
logging.info('auth_sha1: checksum error, data %s' % (binascii.hexlify(self.recv_buf[:length]),))
self.raw_trans = True
self.recv_buf = b''
if self.decrypt_packet_num == 0:
return (b'E'*2048, False)
else:
raise Exception('server_post_decrype data uncorrect checksum')
pos = common.ord(self.recv_buf[2]) + 2
out_buf += self.recv_buf[pos:length - 4]
self.recv_buf = self.recv_buf[length:]
if out_buf:
self.server_info.data.update(self.client_id, self.connection_id)
self.decrypt_packet_num += 1
return (out_buf, False)
class obfs_auth_v2_data(object): class obfs_auth_v2_data(object):
def __init__(self): def __init__(self):
self.client_id = lru_cache.LRUCache() self.client_id = lru_cache.LRUCache()
@ -425,207 +178,6 @@ class obfs_auth_v2_data(object):
else: else:
return self.client_id[client_id].insert(connection_id) return self.client_id[client_id].insert(connection_id)
class auth_sha1_v2(auth_base):
def __init__(self, method):
super(auth_sha1_v2, self).__init__(method)
self.recv_buf = b''
self.unit_len = 8100
self.decrypt_packet_num = 0
self.raw_trans = False
self.has_sent_header = False
self.has_recv_header = False
self.client_id = 0
self.connection_id = 0
self.salt = b"auth_sha1_v2"
self.no_compatible_method = 'auth_sha1_v2'
def init_data(self):
return obfs_auth_v2_data()
def set_server_info(self, server_info):
self.server_info = server_info
try:
max_client = int(server_info.protocol_param)
except:
max_client = 64
self.server_info.data.set_max_client(max_client)
def rnd_data(self, buf_size):
if buf_size > 1300:
return b'\x01'
if buf_size > 400:
rnd_data = os.urandom(common.ord(os.urandom(1)[0]) % 128)
return common.chr(len(rnd_data) + 1) + rnd_data
rnd_data = os.urandom(struct.unpack('>H', os.urandom(2))[0] % 1024)
return common.chr(255) + struct.pack('>H', len(rnd_data) + 3) + rnd_data
def pack_data(self, buf):
data = self.rnd_data(len(buf)) + buf
data = struct.pack('>H', len(data) + 6) + data
adler32 = zlib.adler32(data) & 0xFFFFFFFF
data += struct.pack('<I', adler32)
return data
def pack_auth_data(self, buf):
if len(buf) == 0:
return b''
data = self.rnd_data(len(buf)) + buf
data = struct.pack('>H', len(data) + 16) + data
crc = binascii.crc32(self.salt + self.server_info.key) & 0xFFFFFFFF
data = struct.pack('<I', crc) + data
data += hmac.new(self.server_info.iv + self.server_info.key, data, hashlib.sha1).digest()[:10]
return data
def auth_data(self):
if self.server_info.data.connection_id > 0xFF000000:
self.server_info.data.local_client_id = b''
if not self.server_info.data.local_client_id:
self.server_info.data.local_client_id = os.urandom(8)
logging.debug("local_client_id %s" % (binascii.hexlify(self.server_info.data.local_client_id),))
self.server_info.data.connection_id = struct.unpack('<Q', self.server_info.data.local_client_id)[0] % 0xFFFFFD
self.server_info.data.connection_id += 1
return b''.join([self.server_info.data.local_client_id,
struct.pack('<I', self.server_info.data.connection_id)])
def client_pre_encrypt(self, buf):
ret = b''
if not self.has_sent_header:
head_size = self.get_head_size(buf, 30)
datalen = min(len(buf), random.randint(0, 31) + head_size)
ret += self.pack_auth_data(self.auth_data() + buf[:datalen])
buf = buf[datalen:]
self.has_sent_header = True
while len(buf) > self.unit_len:
ret += self.pack_data(buf[:self.unit_len])
buf = buf[self.unit_len:]
ret += self.pack_data(buf)
return ret
def client_post_decrypt(self, buf):
if self.raw_trans:
return buf
self.recv_buf += buf
out_buf = b''
while len(self.recv_buf) > 2:
length = struct.unpack('>H', self.recv_buf[:2])[0]
if length >= 8192 or length < 7:
self.raw_trans = True
self.recv_buf = b''
raise Exception('client_post_decrypt data error')
if length > len(self.recv_buf):
break
if struct.pack('<I', zlib.adler32(self.recv_buf[:length - 4]) & 0xFFFFFFFF) != self.recv_buf[length - 4:length]:
self.raw_trans = True
self.recv_buf = b''
raise Exception('client_post_decrypt data uncorrect checksum')
pos = common.ord(self.recv_buf[2])
if pos < 255:
pos += 2
else:
pos = struct.unpack('>H', self.recv_buf[3:5])[0] + 2
out_buf += self.recv_buf[pos:length - 4]
self.recv_buf = self.recv_buf[length:]
if out_buf:
self.decrypt_packet_num += 1
return out_buf
def server_pre_encrypt(self, buf):
if self.raw_trans:
return buf
ret = b''
while len(buf) > self.unit_len:
ret += self.pack_data(buf[:self.unit_len])
buf = buf[self.unit_len:]
ret += self.pack_data(buf)
return ret
def server_post_decrypt(self, buf):
if self.raw_trans:
return (buf, False)
self.recv_buf += buf
out_buf = b''
sendback = False
if not self.has_recv_header:
if len(self.recv_buf) < 6:
return (b'', False)
crc = struct.pack('<I', binascii.crc32(self.salt + self.server_info.key) & 0xFFFFFFFF)
if crc != self.recv_buf[:4]:
return self.not_match_return(self.recv_buf)
length = struct.unpack('>H', self.recv_buf[4:6])[0]
if length > 2048:
return self.not_match_return(self.recv_buf)
if length > len(self.recv_buf):
return (b'', False)
sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, self.recv_buf[:length - 10], hashlib.sha1).digest()[:10]
if sha1data != self.recv_buf[length - 10:length]:
logging.error('auth_sha1_v2 data uncorrect auth HMAC-SHA1')
return self.not_match_return(self.recv_buf)
pos = common.ord(self.recv_buf[6])
if pos < 255:
pos += 6
else:
pos = struct.unpack('>H', self.recv_buf[7:9])[0] + 6
out_buf = self.recv_buf[pos:length - 10]
if len(out_buf) < 12:
logging.info('auth_sha1_v2: too short, data %s' % (binascii.hexlify(self.recv_buf),))
return self.not_match_return(self.recv_buf)
client_id = struct.unpack('<Q', out_buf[:8])[0]
connection_id = struct.unpack('<I', out_buf[8:12])[0]
if self.server_info.data.insert(client_id, connection_id):
self.has_recv_header = True
out_buf = out_buf[12:]
self.client_id = client_id
self.connection_id = connection_id
else:
logging.info('auth_sha1_v2: auth fail, data %s' % (binascii.hexlify(out_buf),))
return self.not_match_return(self.recv_buf)
self.recv_buf = self.recv_buf[length:]
self.has_recv_header = True
sendback = True
while len(self.recv_buf) > 2:
length = struct.unpack('>H', self.recv_buf[:2])[0]
if length >= 8192 or length < 7:
self.raw_trans = True
self.recv_buf = b''
if self.decrypt_packet_num == 0:
logging.info('auth_sha1_v2: over size')
return (b'E'*2048, False)
else:
raise Exception('server_post_decrype data error')
if length > len(self.recv_buf):
break
if struct.pack('<I', zlib.adler32(self.recv_buf[:length - 4]) & 0xFFFFFFFF) != self.recv_buf[length - 4:length]:
logging.info('auth_sha1_v2: checksum error, data %s' % (binascii.hexlify(self.recv_buf[:length]),))
self.raw_trans = True
self.recv_buf = b''
if self.decrypt_packet_num == 0:
return (b'E'*2048, False)
else:
raise Exception('server_post_decrype data uncorrect checksum')
pos = common.ord(self.recv_buf[2])
if pos < 255:
pos += 2
else:
pos = struct.unpack('>H', self.recv_buf[3:5])[0] + 2
out_buf += self.recv_buf[pos:length - 4]
self.recv_buf = self.recv_buf[length:]
if pos == length - 4:
sendback = True
if out_buf:
self.server_info.data.update(self.client_id, self.connection_id)
self.decrypt_packet_num += 1
return (out_buf, sendback)
class auth_sha1_v4(auth_base): class auth_sha1_v4(auth_base):
def __init__(self, method): def __init__(self, method):
super(auth_sha1_v4, self).__init__(method) super(auth_sha1_v4, self).__init__(method)
@ -1215,7 +767,7 @@ class auth_aes128_sha1(auth_base):
return b'' return b''
return buf[:-4] return buf[:-4]
def server_udp_pre_encrypt(self, buf): def server_udp_pre_encrypt(self, buf, uid):
user_key = self.server_info.key user_key = self.server_info.key
return buf + hmac.new(user_key, buf, self.hashfunc).digest()[:4] return buf + hmac.new(user_key, buf, self.hashfunc).digest()[:4]

82
shadowsocks/obfsplugin/auth_chain.py
View File

@ -289,6 +289,10 @@ class auth_chain_a(auth_base):
return random.next() % 521 return random.next() % 521
return random.next() % 1021 return random.next() % 1021
def udp_rnd_data_len(self, last_hash, random):
random.init_from_bin(last_hash)
return random.next() % 127
def rnd_start_pos(self, rand_len, random): def rnd_start_pos(self, rand_len, random):
if rand_len > 0: if rand_len > 0:
return random.next() % 8589934609 % rand_len return random.next() % 8589934609 % rand_len
@ -457,20 +461,12 @@ class auth_chain_a(auth_base):
return (b'', False) return (b'', False)
self.last_client_hash = md5data self.last_client_hash = md5data
md5data = hmac.new(mac_key, self.recv_buf[12 : 12 + 20], self.hashfunc).digest()
if md5data[:4] != self.recv_buf[32:36]:
logging.error('%s data uncorrect auth HMAC-SHA1 from %s:%d, data %s' % (self.no_compatible_method, self.server_info.client, self.server_info.client_port, binascii.hexlify(self.recv_buf)))
if len(self.recv_buf) < 36:
return (b'', False)
return self.not_match_return(self.recv_buf)
self.last_server_hash = md5data
uid = struct.unpack('<I', self.recv_buf[12:16])[0] ^ struct.unpack('<I', md5data[8:12])[0] uid = struct.unpack('<I', self.recv_buf[12:16])[0] ^ struct.unpack('<I', md5data[8:12])[0]
self.user_id_num = uid self.user_id_num = uid
uid = struct.pack('<I', uid) uid = struct.pack('<I', uid)
if uid in self.server_info.users: if uid in self.server_info.users:
self.user_id = uid self.user_id = uid
self.user_key = self.hashfunc(self.server_info.users[uid]).digest() self.user_key = self.server_info.users[uid]
self.server_info.update_user_func(uid) self.server_info.update_user_func(uid)
else: else:
self.user_id_num = 0 self.user_id_num = 0
@ -478,6 +474,15 @@ class auth_chain_a(auth_base):
self.user_key = self.server_info.key self.user_key = self.server_info.key
else: else:
self.user_key = self.server_info.recv_iv self.user_key = self.server_info.recv_iv
md5data = hmac.new(self.user_key, self.recv_buf[12 : 12 + 20], self.hashfunc).digest()
if md5data[:4] != self.recv_buf[32:36]:
logging.error('%s data uncorrect auth HMAC-SHA1 from %s:%d, data %s' % (self.no_compatible_method, self.server_info.client, self.server_info.client_port, binascii.hexlify(self.recv_buf)))
if len(self.recv_buf) < 36:
return (b'', False)
return self.not_match_return(self.recv_buf)
self.last_server_hash = md5data
encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + self.salt, 'aes-128-cbc') encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + self.salt, 'aes-128-cbc')
head = encryptor.decrypt(b'\x00' * 16 + self.recv_buf[16:32] + b'\x00') # need an extra byte or recv empty head = encryptor.decrypt(b'\x00' * 16 + self.recv_buf[16:32] + b'\x00') # need an extra byte or recv empty
self.client_over_head = struct.unpack('<H', head[12:14])[0] self.client_over_head = struct.unpack('<H', head[12:14])[0]
@ -497,7 +502,7 @@ class auth_chain_a(auth_base):
logging.info('%s: auth fail, data %s' % (self.no_compatible_method, binascii.hexlify(out_buf))) logging.info('%s: auth fail, data %s' % (self.no_compatible_method, binascii.hexlify(out_buf)))
return self.not_match_return(self.recv_buf) return self.not_match_return(self.recv_buf)
self.encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + to_bytes(base64.b64encode(self.last_server_hash)), 'rc4') self.encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + to_bytes(base64.b64encode(self.last_client_hash)), 'rc4')
self.recv_buf = self.recv_buf[36:] self.recv_buf = self.recv_buf[36:]
self.has_recv_header = True self.has_recv_header = True
sendback = True sendback = True
@ -555,32 +560,65 @@ class auth_chain_a(auth_base):
if self.user_key is None: if self.user_key is None:
self.user_id = os.urandom(4) self.user_id = os.urandom(4)
self.user_key = self.server_info.key self.user_key = self.server_info.key
buf += self.user_id authdata = os.urandom(3)
return buf + hmac.new(self.user_key, buf, self.hashfunc).digest()[:4] mac_key = self.server_info.key
md5data = hmac.new(mac_key, authdata, self.hashfunc).digest()
uid = struct.unpack('<I', self.user_id)[0] ^ struct.unpack('<I', md5data[:4])[0]
uid = struct.pack('<I', uid)
rand_len = self.udp_rnd_data_len(md5data, self.random_client)
encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + to_bytes(base64.b64encode(md5data)), 'rc4')
out_buf = encryptor.encrypt(buf)
buf = out_buf + os.urandom(rand_len) + authdata + uid
return buf + hmac.new(self.user_key, buf, self.hashfunc).digest()[:1]
def client_udp_post_decrypt(self, buf): def client_udp_post_decrypt(self, buf):
user_key = self.server_info.key if len(buf) <= 8:
if hmac.new(user_key, buf[:-4], self.hashfunc).digest()[:4] != buf[-4:]: return (b'', None)
return b'' if hmac.new(self.user_key, buf[:-1], self.hashfunc).digest()[:1] != buf[-1:]:
return buf[:-4] return (b'', None)
mac_key = self.server_info.key
md5data = hmac.new(mac_key, buf[-8:-1], self.hashfunc).digest()
rand_len = self.udp_rnd_data_len(md5data, self.random_server)
encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + to_bytes(base64.b64encode(md5data)), 'rc4')
return encryptor.decrypt(buf[:-8 - rand_len])
def server_udp_pre_encrypt(self, buf): def server_udp_pre_encrypt(self, buf, uid):
if uid in self.server_info.users:
user_key = self.server_info.users[uid]
else:
uid = None
if not self.server_info.users:
user_key = self.server_info.key user_key = self.server_info.key
return buf + hmac.new(user_key, buf, self.hashfunc).digest()[:4] else:
user_key = self.server_info.recv_iv
authdata = os.urandom(7)
mac_key = self.server_info.key
md5data = hmac.new(mac_key, authdata, self.hashfunc).digest()
rand_len = self.udp_rnd_data_len(md5data, self.random_server)
encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + to_bytes(base64.b64encode(md5data)), 'rc4')
out_buf = encryptor.encrypt(buf)
buf = out_buf + os.urandom(rand_len) + authdata
return buf + hmac.new(user_key, buf, self.hashfunc).digest()[:1]
def server_udp_post_decrypt(self, buf): def server_udp_post_decrypt(self, buf):
uid = buf[-8:-4] mac_key = self.server_info.key
md5data = hmac.new(mac_key, buf[-8:-5], self.hashfunc).digest()
uid = struct.unpack('<I', buf[-5:-1])[0] ^ struct.unpack('<I', md5data[:4])[0]
uid = struct.pack('<I', uid)
if uid in self.server_info.users: if uid in self.server_info.users:
user_key = self.hashfunc(self.server_info.users[uid]).digest() user_key = self.server_info.users[uid]
else: else:
uid = None uid = None
if not self.server_info.users: if not self.server_info.users:
user_key = self.server_info.key user_key = self.server_info.key
else: else:
user_key = self.server_info.recv_iv user_key = self.server_info.recv_iv
if hmac.new(user_key, buf[:-4], self.hashfunc).digest()[:4] != buf[-4:]: if hmac.new(user_key, buf[:-1], self.hashfunc).digest()[:1] != buf[-1:]:
return (b'', None) return (b'', None)
return (buf[:-8], uid) rand_len = self.udp_rnd_data_len(md5data, self.random_client)
encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(user_key)) + to_bytes(base64.b64encode(md5data)), 'rc4')
out_buf = encryptor.decrypt(buf[:-8 - rand_len])
return (out_buf, uid)
def dispose(self): def dispose(self):
self.server_info.data.remove(self.user_id, self.client_id) self.server_info.data.remove(self.user_id, self.client_id)

2
shadowsocks/obfsplugin/plain.py
View File

@ -81,7 +81,7 @@ class plain(object):
def client_udp_post_decrypt(self, buf): def client_udp_post_decrypt(self, buf):
return buf return buf
def server_udp_pre_encrypt(self, buf): def server_udp_pre_encrypt(self, buf, uid):
return buf return buf
def server_udp_post_decrypt(self, buf): def server_udp_post_decrypt(self, buf):

206
shadowsocks/obfsplugin/verify.py
View File

@ -36,23 +36,11 @@ from shadowsocks import common
from shadowsocks.obfsplugin import plain from shadowsocks.obfsplugin import plain
from shadowsocks.common import to_bytes, to_str, ord, chr from shadowsocks.common import to_bytes, to_str, ord, chr
def create_verify_obfs(method):
return verify_simple(method)
def create_verify_deflate(method): def create_verify_deflate(method):
return verify_deflate(method) return verify_deflate(method)
def create_verify_sha1(method):
return verify_sha1(method)
def create_auth_obfs(method):
return auth_simple(method)
obfs_map = { obfs_map = {
'verify_simple': (create_verify_obfs,),
'verify_deflate': (create_verify_deflate,), 'verify_deflate': (create_verify_deflate,),
'verify_sha1': (create_verify_sha1,),
'verify_sha1_compatible': (create_verify_sha1,),
} }
def match_begin(str1, str2): def match_begin(str1, str2):
@ -88,100 +76,6 @@ class verify_base(plain.plain):
def server_decode(self, buf): def server_decode(self, buf):
return (buf, True, False) return (buf, True, False)
class verify_simple(verify_base):
def __init__(self, method):
super(verify_simple, self).__init__(method)
self.recv_buf = b''
self.unit_len = 8100
self.decrypt_packet_num = 0
self.raw_trans = False
def pack_data(self, buf):
if len(buf) == 0:
return b''
rnd_data = os.urandom(common.ord(os.urandom(1)[0]) % 16)
data = common.chr(len(rnd_data) + 1) + rnd_data + buf
data = struct.pack('>H', len(data) + 6) + data
crc = (0xffffffff - binascii.crc32(data)) & 0xffffffff
data += struct.pack('<I', crc)
return data
def client_pre_encrypt(self, buf):
ret = b''
while len(buf) > self.unit_len:
ret += self.pack_data(buf[:self.unit_len])
buf = buf[self.unit_len:]
ret += self.pack_data(buf)
return ret
def client_post_decrypt(self, buf):
if self.raw_trans:
return buf
self.recv_buf += buf
out_buf = b''
while len(self.recv_buf) > 2:
length = struct.unpack('>H', self.recv_buf[:2])[0]
if length >= 8192 or length < 7:
self.raw_trans = True
self.recv_buf = b''
raise Exception('client_post_decrypt data error')
if length > len(self.recv_buf):
break
if (binascii.crc32(self.recv_buf[:length]) & 0xffffffff) != 0xffffffff:
self.raw_trans = True
self.recv_buf = b''
raise Exception('client_post_decrypt data uncorrect CRC32')
pos = common.ord(self.recv_buf[2]) + 2
out_buf += self.recv_buf[pos:length - 4]
self.recv_buf = self.recv_buf[length:]
if out_buf:
self.decrypt_packet_num += 1
return out_buf
def server_pre_encrypt(self, buf):
ret = b''
while len(buf) > self.unit_len:
ret += self.pack_data(buf[:self.unit_len])
buf = buf[self.unit_len:]
ret += self.pack_data(buf)
return ret
def server_post_decrypt(self, buf):
if self.raw_trans:
return (buf, False)
self.recv_buf += buf
out_buf = b''
while len(self.recv_buf) > 2:
length = struct.unpack('>H', self.recv_buf[:2])[0]
if length >= 8192 or length < 7:
self.raw_trans = True
self.recv_buf = b''
if self.decrypt_packet_num == 0:
return (b'E'*2048, False)
else:
raise Exception('server_post_decrype data error')
if length > len(self.recv_buf):
break
if (binascii.crc32(self.recv_buf[:length]) & 0xffffffff) != 0xffffffff:
self.raw_trans = True
self.recv_buf = b''
if self.decrypt_packet_num == 0:
return (b'E'*2048, False)
else:
raise Exception('server_post_decrype data uncorrect CRC32')
pos = common.ord(self.recv_buf[2]) + 2
out_buf += self.recv_buf[pos:length - 4]
self.recv_buf = self.recv_buf[length:]
if out_buf:
self.decrypt_packet_num += 1
return (out_buf, False)
class verify_deflate(verify_base): class verify_deflate(verify_base):
def __init__(self, method): def __init__(self, method):
super(verify_deflate, self).__init__(method) super(verify_deflate, self).__init__(method)
@ -258,103 +152,3 @@ class verify_deflate(verify_base):
self.decrypt_packet_num += 1 self.decrypt_packet_num += 1
return (out_buf, False) return (out_buf, False)
class verify_sha1(verify_base):
def __init__(self, method):
super(verify_sha1, self).__init__(method)
self.recv_buf = b''
self.unit_len = 8100
self.raw_trans = False
self.pack_id = 0
self.recv_id = 0
self.has_sent_header = False
self.has_recv_header = False
def pack_data(self, buf):
if len(buf) == 0:
return b''
sha1data = hmac.new(self.server_info.iv + struct.pack('>I', self.pack_id), buf, hashlib.sha1).digest()
data = struct.pack('>H', len(buf)) + sha1data[:10] + buf
self.pack_id += 1
return data
def pack_auth_data(self, buf):
data = chr(ord(buf[0]) | 0x10) + buf[1:]
data += hmac.new(self.server_info.iv + self.server_info.key, data, hashlib.sha1).digest()[:10]
return data
def client_pre_encrypt(self, buf):
ret = b''
if not self.has_sent_header:
datalen = self.get_head_size(buf, 30)
ret += self.pack_auth_data(buf[:datalen])
buf = buf[datalen:]
self.has_sent_header = True
while len(buf) > self.unit_len:
ret += self.pack_data(buf[:self.unit_len])
buf = buf[self.unit_len:]
ret += self.pack_data(buf)
return ret
def client_post_decrypt(self, buf):
return buf
def server_pre_encrypt(self, buf):
return buf
def not_match_return(self, buf):
self.raw_trans = True
if self.method == 'verify_sha1':
return (b'E'*2048, False)
return (buf, False)
def server_post_decrypt(self, buf):
if self.raw_trans:
return (buf, False)
self.recv_buf += buf
out_buf = b''
if not self.has_recv_header:
if len(self.recv_buf) < 2:
return (b'', False)
if (ord(self.recv_buf[0]) & 0x10) != 0x10:
return self.not_match_return(self.recv_buf)
head_size = self.get_head_size(self.recv_buf, 65536)
if len(self.recv_buf) < head_size + 10:
return self.not_match_return(self.recv_buf)
sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, self.recv_buf[:head_size], hashlib.sha1).digest()[:10]
if sha1data != self.recv_buf[head_size:head_size + 10]:
logging.error('server_post_decrype data uncorrect auth HMAC-SHA1')
return self.not_match_return(self.recv_buf)
out_buf = to_bytes(chr(ord(self.recv_buf[0]) & 0xEF)) + self.recv_buf[1:head_size]
self.recv_buf = self.recv_buf[head_size + 10:]
self.has_recv_header = True
while len(self.recv_buf) > 2:
length = struct.unpack('>H', self.recv_buf[:2])[0] + 12
if length > len(self.recv_buf):
break
data = self.recv_buf[12:length]
sha1data = hmac.new(self.server_info.recv_iv + struct.pack('>I', self.recv_id), data, hashlib.sha1).digest()[:10]
if sha1data != self.recv_buf[2:12]:
raise Exception('server_post_decrype data uncorrect chunk HMAC-SHA1')
self.recv_id = (self.recv_id + 1) & 0xFFFFFFFF
out_buf += data
self.recv_buf = self.recv_buf[length:]
return (out_buf, False)
def client_udp_pre_encrypt(self, buf):
ret = self.pack_auth_data(buf)
return chr(ord(buf[0]) | 0x10) + buf[1:]
def server_udp_post_decrypt(self, buf):
if buf and ((ord(buf[0]) & 0x10) == 0x10):
if len(buf) <= 11:
return (b'', None)
sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, buf[:-10], hashlib.sha1).digest()[:10]
if sha1data != buf[-10:]:
return (b'', None)
return (to_bytes(chr(ord(buf[0]) & 0xEF)) + buf[1:-10], None)
else:
return (buf, None)

2
shadowsocks/tcprelay.py
View File

@ -1116,7 +1116,7 @@ class TCPRelay(object):
listen_port = config['server_port'] listen_port = config['server_port']
self._listen_port = listen_port self._listen_port = listen_port
if common.to_bytes(config['protocol']) in [b"auth_aes128_md5", b"auth_aes128_sha1"]: if common.to_str(config['protocol']) in obfs.mu_protocol():
self._update_users(None, None) self._update_users(None, None)
addrs = socket.getaddrinfo(listen_addr, listen_port, 0, addrs = socket.getaddrinfo(listen_addr, listen_port, 0,

837
shadowsocks/udprelay.py
View File

@ -123,751 +123,6 @@ RSP_STATE_ERROR = b"\x03"
RSP_STATE_DISCONNECT = b"\x04" RSP_STATE_DISCONNECT = b"\x04"
RSP_STATE_REDIRECT = b"\x05" RSP_STATE_REDIRECT = b"\x05"
class UDPLocalAddress(object):
def __init__(self, addr):
self.addr = addr
self.last_activity = time.time()
def is_timeout(self):
return time.time() - self.last_activity > 30
class PacketInfo(object):
def __init__(self, data):
self.data = data
self.time = time.time()
class SendingQueue(object):
def __init__(self):
self.queue = {}
self.begin_id = 0
self.end_id = 1
self.interval = 0.5
def append(self, data):
self.queue[self.end_id] = PacketInfo(data)
self.end_id += 1
return self.end_id - 1
def empty(self):
return self.begin_id + 1 == self.end_id
def size(self):
return self.end_id - self.begin_id - 1
def get_begin_id(self):
return self.begin_id
def get_end_id(self):
return self.end_id
def get_data_list(self, pack_id_base, pack_id_list):
ret_list = []
curtime = time.time()
for pack_id in pack_id_list:
offset = pack_id_base + pack_id
if offset <= self.begin_id or self.end_id <= offset:
continue
ret_data = self.queue[offset]
if curtime - ret_data.time > self.interval:
ret_data.time = curtime
ret_list.append( (offset, ret_data.data) )
return ret_list
def set_finish(self, begin_id, done_list):
while self.begin_id < begin_id:
self.begin_id += 1
del self.queue[self.begin_id]
class RecvQueue(object):
def __init__(self):
self.queue = {}
self.miss_queue = set()
self.begin_id = 0
self.end_id = 1
def empty(self):
return self.begin_id + 1 == self.end_id
def insert(self, pack_id, data):
if (pack_id not in self.queue) and pack_id > self.begin_id:
self.queue[pack_id] = PacketInfo(data)
if self.end_id == pack_id:
self.end_id = pack_id + 1
elif self.end_id < pack_id:
eid = self.end_id
while eid < pack_id:
self.miss_queue.add(eid)
eid += 1
self.end_id = pack_id + 1
else:
self.miss_queue.remove(pack_id)
def set_end(self, end_id):
if end_id > self.end_id:
eid = self.end_id
while eid < end_id:
self.miss_queue.add(eid)
eid += 1
self.end_id = end_id
def get_begin_id(self):
return self.begin_id
def has_data(self):
return (self.begin_id + 1) in self.queue
def get_data(self):
if (self.begin_id + 1) in self.queue:
self.begin_id += 1
pack_id = self.begin_id
ret_data = self.queue[pack_id]
del self.queue[pack_id]
return (pack_id, ret_data.data)
def get_missing_id(self, begin_id):
missing = []
if begin_id == 0:
begin_id = self.begin_id
for i in self.miss_queue:
if i - begin_id > 32768:
break
missing.append(i - begin_id)
return (begin_id, missing)
class AddressMap(object):
def __init__(self):
self._queue = []
self._addr_map = {}
def add(self, addr):
if addr in self._addr_map:
self._addr_map[addr] = UDPLocalAddress(addr)
else:
self._addr_map[addr] = UDPLocalAddress(addr)
self._queue.append(addr)
def keys(self):
return self._queue
def get(self):
if self._queue:
while True:
if len(self._queue) == 1:
return self._queue[0]
index = random.randint(0, len(self._queue) - 1)
addr = self._queue[index]
if self._addr_map[addr].is_timeout():
self._queue[index] = self._queue[len(self._queue) - 1]
del self._queue[len(self._queue) - 1]
del self._addr_map[addr]
else:
break
return addr
else:
return None
class TCPRelayHandler(object):
def __init__(self, server, reqid_to_handlers, fd_to_handlers, loop,
local_sock, local_id, client_param, config,
dns_resolver, is_local):
self._server = server
self._reqid_to_handlers = reqid_to_handlers
self._fd_to_handlers = fd_to_handlers
self._loop = loop
self._local_sock = local_sock
self._remote_sock = None
self._remote_udp = False
self._config = config
self._dns_resolver = dns_resolver
self._local_id = local_id
self._is_local = is_local
self._stage = STAGE_INIT
self._password = config['password']
self._method = config['method']
self._fastopen_connected = False
self._data_to_write_to_local = []
self._data_to_write_to_remote = []
self._upstream_status = WAIT_STATUS_READING
self._downstream_status = WAIT_STATUS_INIT
self._request_id = 0
self._client_address = AddressMap()
self._remote_address = None
self._sendingqueue = SendingQueue()
self._recvqueue = RecvQueue()
if 'forbidden_ip' in config:
self._forbidden_iplist = config['forbidden_ip']
else:
self._forbidden_iplist = None
if 'forbidden_port' in config:
self._forbidden_portset = config['forbidden_port']
else:
self._forbidden_portset = None
#fd_to_handlers[local_sock.fileno()] = self
#local_sock.setblocking(False)
#loop.add(local_sock, eventloop.POLL_IN | eventloop.POLL_ERR)
self.last_activity = 0
self._update_activity()
self._random_mtu_size = [random.randint(POST_MTU_MIN, POST_MTU_MAX) for i in range(1024)]
self._random_mtu_index = 0
self._rand_data = b"\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f\x10" * 4
def __hash__(self):
# default __hash__ is id / 16
# we want to eliminate collisions
return id(self)
@property
def remote_address(self):
return self._remote_address
def add_local_address(self, addr):
self._client_address.add(addr)
def get_local_address(self):
return self._client_address.get()
def _update_activity(self):
# tell the TCP Relay we have activities recently
# else it will think we are inactive and timed out
self._server.update_activity(self)
def _update_stream(self, stream, status):
# update a stream to a new waiting status
# check if status is changed
# only update if dirty
dirty = False
if stream == STREAM_DOWN:
if self._downstream_status != status:
self._downstream_status = status
dirty = True
elif stream == STREAM_UP:
if self._upstream_status != status:
self._upstream_status = status
dirty = True
if dirty:
'''
if self._local_sock:
event = eventloop.POLL_ERR
if self._downstream_status & WAIT_STATUS_WRITING:
event |= eventloop.POLL_OUT
if self._upstream_status & WAIT_STATUS_READING:
event |= eventloop.POLL_IN
self._loop.modify(self._local_sock, event)
'''
if self._remote_sock:
event = eventloop.POLL_ERR
if self._downstream_status & WAIT_STATUS_READING:
event |= eventloop.POLL_IN
if self._upstream_status & WAIT_STATUS_WRITING:
event |= eventloop.POLL_OUT
self._loop.modify(self._remote_sock, event)
def _write_to_sock(self, data, sock, addr = None):
# write data to sock
# if only some of the data are written, put remaining in the buffer
# and update the stream to wait for writing
if not data or not sock:
return False
uncomplete = False
retry = 0
if sock == self._local_sock:
data = encrypt.encrypt_all(self._password, self._method, 1, data)
if addr is None:
return False
try:
self._server.write_to_server_socket(data, addr)
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
uncomplete = True
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
pass
else:
#traceback.print_exc()
shell.print_exception(e)
self.destroy()
return False
else:
try:
l = len(data)
s = sock.send(data)
if s < l:
data = data[s:]
uncomplete = True
except (OSError, IOError) as e:
error_no = eventloop.errno_from_exception(e)
if error_no in (errno.EAGAIN, errno.EINPROGRESS,
errno.EWOULDBLOCK):
uncomplete = True
else:
#logging.error(traceback.extract_stack())
#traceback.print_exc()
shell.print_exception(e)
self.destroy()
return False
if uncomplete:
if sock == self._local_sock:
self._update_stream(STREAM_DOWN, WAIT_STATUS_WRITING)
elif sock == self._remote_sock:
self._data_to_write_to_remote.append(data)
self._update_stream(STREAM_UP, WAIT_STATUS_WRITING)
else:
logging.error('write_all_to_sock:unknown socket')
else:
if sock == self._local_sock:
if self._sendingqueue.size() > SENDING_WINDOW_SIZE:
self._update_stream(STREAM_DOWN, WAIT_STATUS_WRITING)
else:
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
elif sock == self._remote_sock:
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
else:
logging.error('write_all_to_sock:unknown socket')
return True
def _create_remote_socket(self, ip, port):
addrs = socket.getaddrinfo(ip, port, 0, socket.SOCK_STREAM, socket.SOL_TCP)
if len(addrs) == 0:
raise Exception("getaddrinfo failed for %s:%d" % (ip, port))
af, socktype, proto, canonname, sa = addrs[0]
if self._forbidden_iplist:
if common.to_str(sa[0]) in self._forbidden_iplist:
raise Exception('IP %s is in forbidden list, reject' %
common.to_str(sa[0]))
remote_sock = socket.socket(af, socktype, proto)
self._remote_sock = remote_sock
self._fd_to_handlers[remote_sock.fileno()] = self
remote_sock.setblocking(False)
remote_sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
return remote_sock
def _handle_dns_resolved(self, result, error):
if error:
self._log_error(error)
self.destroy()
return
if result:
ip = result[1]
if ip:
try:
self._stage = STAGE_CONNECTING
remote_addr = ip
remote_port = self._remote_address[1]
logging.info("connect to %s : %d" % (remote_addr, remote_port))
remote_sock = self._create_remote_socket(remote_addr,
remote_port)
try:
remote_sock.connect((remote_addr, remote_port))
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in (errno.EINPROGRESS,
errno.EWOULDBLOCK):
pass # always goto here
else:
raise e
self._loop.add(remote_sock,
eventloop.POLL_ERR | eventloop.POLL_OUT,
self._server)
self._update_stream(STREAM_UP, WAIT_STATUS_READWRITING)
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
self._stage = STAGE_STREAM
addr = self.get_local_address()
for i in range(2):
rsp_data = self._pack_rsp_data(CMD_RSP_CONNECT_REMOTE, RSP_STATE_CONNECTEDREMOTE)
self._write_to_sock(rsp_data, self._local_sock, addr)
return
except Exception as e:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
self.destroy()
def _on_local_read(self):
# handle all local read events and dispatch them to methods for
# each stage
self._update_activity()
if not self._local_sock:
return
data = None
try:
data = self._local_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK):
return
if not data:
self.destroy()
return
if not data:
return
self._server.server_transfer_ul += len(data)
#TODO ============================================================
if self._stage == STAGE_STREAM:
self._write_to_sock(data, self._remote_sock)
return
def _on_remote_read(self):
# handle all remote read events
self._update_activity()
data = None
try:
data = self._remote_sock.recv(BUF_SIZE)
except (OSError, IOError) as e:
if eventloop.errno_from_exception(e) in \
(errno.ETIMEDOUT, errno.EAGAIN, errno.EWOULDBLOCK, 10035): #errno.WSAEWOULDBLOCK
return
if not data:
self.destroy()
return
try:
self._server.server_transfer_dl += len(data)
recv_data = data
beg_pos = 0
max_len = len(recv_data)
while beg_pos < max_len:
if beg_pos + POST_MTU_MAX >= max_len:
split_pos = max_len
else:
split_pos = beg_pos + self._random_mtu_size[self._random_mtu_index]
self._random_mtu_index = (self._random_mtu_index + 1) & 0x3ff
#split_pos = beg_pos + random.randint(POST_MTU_MIN, POST_MTU_MAX)
data = recv_data[beg_pos:split_pos]
beg_pos = split_pos
pack_id = self._sendingqueue.append(data)
post_data = self._pack_post_data(CMD_POST, pack_id, data)
addr = self.get_local_address()
self._write_to_sock(post_data, self._local_sock, addr)
if pack_id <= DOUBLE_SEND_BEG_IDS:
post_data = self._pack_post_data(CMD_POST, pack_id, data)
self._write_to_sock(post_data, self._local_sock, addr)
except Exception as e:
shell.print_exception(e)
if self._config['verbose']:
traceback.print_exc()
# TODO use logging when debug completed
self.destroy()
def _on_local_write(self):
# handle local writable event
if self._data_to_write_to_local:
data = b''.join(self._data_to_write_to_local)
self._data_to_write_to_local = []
self._write_to_sock(data, self._local_sock)
else:
self._update_stream(STREAM_DOWN, WAIT_STATUS_READING)
def _on_remote_write(self):
# handle remote writable event
self._stage = STAGE_STREAM
if self._data_to_write_to_remote:
data = b''.join(self._data_to_write_to_remote)
self._data_to_write_to_remote = []
self._write_to_sock(data, self._remote_sock)
else:
self._update_stream(STREAM_UP, WAIT_STATUS_READING)
def _on_local_error(self):
logging.debug('got local error')
if self._local_sock:
logging.error(eventloop.get_sock_error(self._local_sock))
self.destroy()
def _on_remote_error(self):
logging.debug('got remote error')
if self._remote_sock:
logging.error(eventloop.get_sock_error(self._remote_sock))
self.destroy()
def _pack_rsp_data(self, cmd, data):
reqid_str = struct.pack(">H", self._request_id)
return b''.join([CMD_VER_STR, common.chr(cmd), reqid_str, data, self._rand_data[:random.randint(0, len(self._rand_data))], reqid_str])
def _pack_rnd_data(self, data):
length = random.randint(0, len(self._rand_data))
if length == 0:
return data
elif length == 1:
return b"\x81" + data
elif length < 256:
return b"\x80" + common.chr(length) + self._rand_data[:length - 2] + data
else:
return b"\x82" + struct.pack(">H", length) + self._rand_data[:length - 3] + data
def _pack_post_data(self, cmd, pack_id, data):
reqid_str = struct.pack(">H", self._request_id)
recv_id = self._recvqueue.get_begin_id()
rsp_data = b''.join([CMD_VER_STR, common.chr(cmd), reqid_str, struct.pack(">I", recv_id), struct.pack(">I", pack_id), data, reqid_str])
return rsp_data
def _pack_post_data_64(self, cmd, send_id, pack_id, data):
reqid_str = struct.pack(">H", self._request_id)
recv_id = self._recvqueue.get_begin_id()
rsp_data = b''.join([CMD_VER_STR, common.chr(cmd), reqid_str, struct.pack(">Q", recv_id), struct.pack(">Q", pack_id), data, reqid_str])
return rsp_data
def sweep_timeout(self):
logging.info("sweep_timeout")
if self._stage == STAGE_STREAM:
pack_id, missing = self._recvqueue.get_missing_id(0)
logging.info("sweep_timeout %s %s" % (pack_id, missing))
data = b''
for pid in missing:
data += struct.pack(">H", pid)
rsp_data = self._pack_post_data(CMD_SYN_STATUS, pack_id, data)
addr = self.get_local_address()
self._write_to_sock(rsp_data, self._local_sock, addr)
def handle_stream_sync_status(self, addr, cmd, request_id, pack_id, max_send_id, data):
missing_list = []
while len(data) >= 2:
pid = struct.unpack(">H", data[0:2])[0]
data = data[2:]
missing_list.append(pid)
done_list = []
self._recvqueue.set_end(max_send_id)
self._sendingqueue.set_finish(pack_id, done_list)
if self._stage == STAGE_DESTROYED and self._sendingqueue.empty():
self.destroy_local()
return
# post CMD_SYN_STATUS
send_id = self._sendingqueue.get_end_id()
post_pack_id, missing = self._recvqueue.get_missing_id(0)
pack_ids_data = b''
for pid in missing:
pack_ids_data += struct.pack(">H", pid)
rsp_data = self._pack_rnd_data(self._pack_post_data(CMD_SYN_STATUS, send_id, pack_ids_data))
self._write_to_sock(rsp_data, self._local_sock, addr)
send_list = self._sendingqueue.get_data_list(pack_id, missing_list)
for post_pack_id, post_data in send_list:
rsp_data = self._pack_post_data(CMD_POST, post_pack_id, post_data)
self._write_to_sock(rsp_data, self._local_sock, addr)
if post_pack_id <= DOUBLE_SEND_BEG_IDS:
rsp_data = self._pack_post_data(CMD_POST, post_pack_id, post_data)
self._write_to_sock(rsp_data, self._local_sock, addr)
def handle_client(self, addr, cmd, request_id, data):
self.add_local_address(addr)
if cmd == CMD_DISCONNECT:
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, RSP_STATE_EMPTY)
self._write_to_sock(rsp_data, self._local_sock, addr)
self.destroy()
self.destroy_local()
return
if self._stage == STAGE_INIT:
if cmd == CMD_CONNECT:
self._request_id = request_id
self._stage = STAGE_RSP_ID
return
if self._request_id != request_id:
return
if self._stage == STAGE_RSP_ID:
if cmd == CMD_CONNECT:
for i in range(2):
rsp_data = self._pack_rsp_data(CMD_RSP_CONNECT, RSP_STATE_CONNECTED)
self._write_to_sock(rsp_data, self._local_sock, addr)
elif cmd == CMD_CONNECT_REMOTE:
local_id = data[0:4]
if self._local_id == local_id:
data = data[4:]
header_result = parse_header(data)
if header_result is None:
return
connecttype, remote_addr, remote_port, header_length = header_result
self._remote_address = (common.to_str(remote_addr), remote_port)
self._stage = STAGE_DNS
self._dns_resolver.resolve(remote_addr,
self._handle_dns_resolved)
common.connect_log('TCPonUDP connect %s:%d from %s:%d' % (remote_addr, remote_port, addr[0], addr[1]))
else:
# ileagal request
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, RSP_STATE_EMPTY)
self._write_to_sock(rsp_data, self._local_sock, addr)
elif self._stage == STAGE_CONNECTING:
if cmd == CMD_CONNECT_REMOTE:
local_id = data[0:4]
if self._local_id == local_id:
for i in range(2):
rsp_data = self._pack_rsp_data(CMD_RSP_CONNECT_REMOTE, RSP_STATE_CONNECTEDREMOTE)
self._write_to_sock(rsp_data, self._local_sock, addr)
else:
# ileagal request
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, RSP_STATE_EMPTY)
self._write_to_sock(rsp_data, self._local_sock, addr)
elif self._stage == STAGE_STREAM:
if len(data) < 4:
# ileagal request
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, RSP_STATE_EMPTY)
self._write_to_sock(rsp_data, self._local_sock, addr)
return
local_id = data[0:4]
if self._local_id != local_id:
# ileagal request
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, RSP_STATE_EMPTY)
self._write_to_sock(rsp_data, self._local_sock, addr)
return
else:
data = data[4:]
if cmd == CMD_CONNECT_REMOTE:
rsp_data = self._pack_rsp_data(CMD_RSP_CONNECT_REMOTE, RSP_STATE_CONNECTEDREMOTE)
self._write_to_sock(rsp_data, self._local_sock, addr)
elif cmd == CMD_POST:
recv_id = struct.unpack(">I", data[0:4])[0]
pack_id = struct.unpack(">I", data[4:8])[0]
self._recvqueue.insert(pack_id, data[8:])
self._sendingqueue.set_finish(recv_id, [])
elif cmd == CMD_POST_64:
recv_id = struct.unpack(">Q", data[0:8])[0]
pack_id = struct.unpack(">Q", data[8:16])[0]
self._recvqueue.insert(pack_id, data[16:])
self._sendingqueue.set_finish(recv_id, [])
elif cmd == CMD_DISCONNECT:
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, RSP_STATE_EMPTY)
self._write_to_sock(rsp_data, self._local_sock, addr)
self.destroy()
self.destroy_local()
return
elif cmd == CMD_SYN_STATUS:
pack_id = struct.unpack(">I", data[0:4])[0]
max_send_id = struct.unpack(">I", data[4:8])[0]
data = data[8:]
self.handle_stream_sync_status(addr, cmd, request_id, pack_id, max_send_id, data)
elif cmd == CMD_SYN_STATUS_64:
pack_id = struct.unpack(">Q", data[0:8])[0]
max_send_id = struct.unpack(">Q", data[8:16])[0]
data = data[16:]
self.handle_stream_sync_status(addr, cmd, request_id, pack_id, max_send_id, data)
while self._recvqueue.has_data():
pack_id, post_data = self._recvqueue.get_data()
self._write_to_sock(post_data, self._remote_sock)
elif self._stage == STAGE_DESTROYED:
local_id = data[0:4]
if self._local_id != local_id:
# ileagal request
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, RSP_STATE_EMPTY)
self._write_to_sock(rsp_data, self._local_sock, addr)
return
else:
data = data[4:]
if cmd == CMD_SYN_STATUS:
pack_id = struct.unpack(">I", data[0:4])[0]
max_send_id = struct.unpack(">I", data[4:8])[0]
data = data[8:]
self.handle_stream_sync_status(addr, cmd, request_id, pack_id, max_send_id, data)
elif cmd == CMD_SYN_STATUS_64:
pack_id = struct.unpack(">Q", data[0:8])[0]
max_send_id = struct.unpack(">Q", data[8:16])[0]
data = data[16:]
self.handle_stream_sync_status(addr, cmd, request_id, pack_id, max_send_id, data)
def handle_event(self, sock, event):
# handle all events in this handler and dispatch them to methods
handle = False
if self._stage == STAGE_DESTROYED:
logging.debug('ignore handle_event: destroyed')
return True
# order is important
if sock == self._remote_sock:
if event & eventloop.POLL_ERR:
handle = True
self._on_remote_error()
if self._stage == STAGE_DESTROYED:
return True
if event & (eventloop.POLL_IN | eventloop.POLL_HUP):
handle = True
self._on_remote_read()
if self._stage == STAGE_DESTROYED:
return True
if event & eventloop.POLL_OUT:
handle = True
self._on_remote_write()
elif sock == self._local_sock:
if event & eventloop.POLL_ERR:
handle = True
self._on_local_error()
if self._stage == STAGE_DESTROYED:
return True
if event & (eventloop.POLL_IN | eventloop.POLL_HUP):
handle = True
self._on_local_read()
if self._stage == STAGE_DESTROYED:
return True
if event & eventloop.POLL_OUT:
handle = True
self._on_local_write()
else:
logging.warn('unknown socket')
return handle
def _log_error(self, e):
logging.error('%s when handling connection from %s' %
(e, self._client_address.keys()))
def destroy(self):
# destroy the handler and release any resources
# promises:
# 1. destroy won't make another destroy() call inside
# 2. destroy releases resources so it prevents future call to destroy
# 3. destroy won't raise any exceptions
# if any of the promises are broken, it indicates a bug has been
# introduced! mostly likely memory leaks, etc
#logging.info('tcp destroy called')
if self._stage == STAGE_DESTROYED:
# this couldn't happen
logging.debug('already destroyed')
return
self._stage = STAGE_DESTROYED
if self._remote_address:
logging.debug('destroy: %s:%d' %
self._remote_address)
else:
logging.debug('destroy')
if self._remote_sock:
logging.debug('destroying remote')
self._loop.remove(self._remote_sock)
try:
del self._fd_to_handlers[self._remote_sock.fileno()]
except Exception as e:
pass
self._remote_sock.close()
self._remote_sock = None
if self._sendingqueue.empty():
self.destroy_local()
self._dns_resolver.remove_callback(self._handle_dns_resolved)
def destroy_local(self):
if self._local_sock:
logging.debug('disconnect local')
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, RSP_STATE_EMPTY)
addr = None
addr = self.get_local_address()
self._write_to_sock(rsp_data, self._local_sock, addr)
self._local_sock = None
try:
del self._reqid_to_handlers[self._request_id]
except Exception as e:
pass
self._server.remove_handler(self)
def client_key(source_addr, server_af): def client_key(source_addr, server_af):
# notice this is server af, not dest af # notice this is server af, not dest af
return '%s:%s:%d' % (source_addr[0], source_addr[1], server_af) return '%s:%s:%d' % (source_addr[0], source_addr[1], server_af)
@ -908,7 +163,7 @@ class UDPRelay(object):
self.server_user_transfer_ul = {} self.server_user_transfer_ul = {}
self.server_user_transfer_dl = {} self.server_user_transfer_dl = {}
if common.to_bytes(config['protocol']) in [b"auth_aes128_md5", b"auth_aes128_sha1"]: if common.to_bytes(config['protocol']) in obfs.mu_protocol():
self._update_users(None, None) self._update_users(None, None)
self.protocol_data = obfs.obfs(config['protocol']).init_data() self.protocol_data = obfs.obfs(config['protocol']).init_data()
@ -1261,71 +516,6 @@ class UDPRelay(object):
else: else:
shell.print_exception(e) shell.print_exception(e)
def _handle_tcp_over_udp(self, data, r_addr):
#(cmd, request_id, data)
#logging.info("UDP data %d %d %s" % (data[0], data[1], binascii.hexlify(data[2])))
try:
self.server_transfer_ul += len(data[2])
if data[0] == 0:
if len(data[2]) >= 4:
for i in range(64):
req_id = random.randint(1, 65535)
if req_id not in self._reqid_to_hd:
break
if req_id in self._reqid_to_hd:
for i in range(64):
req_id = random.randint(1, 65535)
if type(self._reqid_to_hd[req_id]) is tuple:
break
# return req id
self._reqid_to_hd[req_id] = (data[2][0:4], None)
rsp_data = self._pack_rsp_data(CMD_RSP_CONNECT, req_id, RSP_STATE_CONNECTED)
data_to_send = encrypt.encrypt_all(self._password, self._method, 1, rsp_data)
self.write_to_server_socket(data_to_send, r_addr)
elif data[0] == CMD_CONNECT_REMOTE:
if len(data[2]) > 4 and data[1] in self._reqid_to_hd:
# create
if type(self._reqid_to_hd[data[1]]) is tuple:
if data[2][0:4] == self._reqid_to_hd[data[1]][0]:
handle = TCPRelayHandler(self, self._reqid_to_hd, self._fd_to_handlers,
self._eventloop, self._server_socket,
self._reqid_to_hd[data[1]][0], self._reqid_to_hd[data[1]][1],
self._config, self._dns_resolver, self._is_local)
self._reqid_to_hd[data[1]] = handle
handle.handle_client(r_addr, CMD_CONNECT, data[1], data[2])
handle.handle_client(r_addr, *data)
self.update_activity(handle)
else:
# disconnect
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, data[1], RSP_STATE_EMPTY)
data_to_send = encrypt.encrypt_all(self._password, self._method, 1, rsp_data)
self.write_to_server_socket(data_to_send, r_addr)
else:
self.update_activity(self._reqid_to_hd[data[1]])
self._reqid_to_hd[data[1]].handle_client(r_addr, *data)
else:
# disconnect
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, data[1], RSP_STATE_EMPTY)
data_to_send = encrypt.encrypt_all(self._password, self._method, 1, rsp_data)
self.write_to_server_socket(data_to_send, r_addr)
elif data[0] > CMD_CONNECT_REMOTE and data[0] <= CMD_DISCONNECT:
if data[1] in self._reqid_to_hd:
if type(self._reqid_to_hd[data[1]]) is tuple:
pass
else:
self.update_activity(self._reqid_to_hd[data[1]])
self._reqid_to_hd[data[1]].handle_client(r_addr, *data)
else:
# disconnect
rsp_data = self._pack_rsp_data(CMD_DISCONNECT, data[1], RSP_STATE_EMPTY)
data_to_send = encrypt.encrypt_all(self._password, self._method, 1, rsp_data)
self.write_to_server_socket(data_to_send, r_addr)
return
except Exception as e:
trace = traceback.format_exc()
logging.error(trace)
return
def _handle_client(self, sock): def _handle_client(self, sock):
data, r_addr = sock.recvfrom(BUF_SIZE) data, r_addr = sock.recvfrom(BUF_SIZE)
if not data: if not data:
@ -1333,6 +523,18 @@ class UDPRelay(object):
return return
if self._stat_callback: if self._stat_callback:
self._stat_callback(self._listen_port, len(data)) self._stat_callback(self._listen_port, len(data))
client_addr = self._client_fd_to_server_addr.get(sock.fileno())
client_uid = None
if client_addr:
key = client_key(client_addr[0], client_addr[1])
client_pair = self._cache.get(key, None)
client_dns_pair = self._cache_dns_client.get(key, None)
if client_pair:
client, client_uid = client_pair
elif client_dns_pair:
client, client_uid = client_dns_pair
if not self._is_local: if not self._is_local:
addrlen = len(r_addr[0]) addrlen = len(r_addr[0])
if addrlen > 255: if addrlen > 255:
@ -1341,7 +543,7 @@ class UDPRelay(object):
data = pack_addr(r_addr[0]) + struct.pack('>H', r_addr[1]) + data data = pack_addr(r_addr[0]) + struct.pack('>H', r_addr[1]) + data
ref_iv = [encrypt.encrypt_new_iv(self._method)] ref_iv = [encrypt.encrypt_new_iv(self._method)]
self._protocol.obfs.server_info.iv = ref_iv[0] self._protocol.obfs.server_info.iv = ref_iv[0]
data = self._protocol.server_udp_pre_encrypt(data) data = self._protocol.server_udp_pre_encrypt(data, client_uid)
response = encrypt.encrypt_all_iv(self._protocol.obfs.server_info.key, self._method, 1, response = encrypt.encrypt_all_iv(self._protocol.obfs.server_info.key, self._method, 1,
data, ref_iv) data, ref_iv)
if not response: if not response:
@ -1361,16 +563,9 @@ class UDPRelay(object):
#logging.debug('UDP handle_client %s:%d to %s:%d' % (common.to_str(r_addr[0]), r_addr[1], dest_addr, dest_port)) #logging.debug('UDP handle_client %s:%d to %s:%d' % (common.to_str(r_addr[0]), r_addr[1], dest_addr, dest_port))
response = b'\x00\x00\x00' + data response = b'\x00\x00\x00' + data
client_addr = self._client_fd_to_server_addr.get(sock.fileno())
if client_addr: if client_addr:
key = client_key(client_addr[0], client_addr[1]) if client_uid:
client_pair = self._cache.get(key, None)
client_dns_pair = self._cache_dns_client.get(key, None)
if client_pair:
client, client_uid = client_pair
self.add_transfer_d(client_uid, len(response))
elif client_dns_pair:
client, client_uid = client_dns_pair
self.add_transfer_d(client_uid, len(response)) self.add_transfer_d(client_uid, len(response))
else: else:
self.server_transfer_dl += len(response) self.server_transfer_dl += len(response)

Write Preview
Loading…
Cancel
Save