add auth_aes128
This commit is contained in:
parent
52041387f9
commit
a407bcc568
7 changed files with 291 additions and 23 deletions
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@ -8,7 +8,7 @@
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"timeout": 120,
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"udp_timeout": 60,
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"method": "aes-256-cfb",
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"protocol": "auth_sha1_compatible",
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"protocol": "auth_sha1_v2_compatible",
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"protocol_param": "",
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"obfs": "http_simple_compatible",
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"obfs_param": "",
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@ -204,19 +204,20 @@ def main():
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action = None
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user = {}
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fast_set_obfs = {'0': 'plain',
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'1': 'http_simple_compatible',
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'-1': 'http_simple',
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'2': 'tls1.2_ticket_auth_compatible',
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'-2': 'tls1.2_ticket_auth'}
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'+1': 'http_simple_compatible',
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'1': 'http_simple',
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'+2': 'tls1.2_ticket_auth_compatible',
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'2': 'tls1.2_ticket_auth'}
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fast_set_protocol = {'0': 'origin',
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'1': 'verify_sha1_compatible',
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'-1': 'verify_sha1',
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'2': 'auth_sha1_compatible',
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'-2': 'auth_sha1',
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'3': 'auth_sha1_v2_compatible',
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'-3': 'auth_sha1_v2',
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'4': 'auth_sha1_v3_compatible',
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'-4': 'auth_sha1_v3'}
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'+1': 'verify_sha1_compatible',
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'1': 'verify_sha1',
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'+2': 'auth_sha1_compatible',
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'2': 'auth_sha1',
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'+3': 'auth_sha1_v2_compatible',
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'3': 'auth_sha1_v2',
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'+4': 'auth_sha1_v4_compatible',
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'4': 'auth_sha1_v4',
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'a1': 'auth_aes128'}
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fast_set_method = {'a0': 'aes-128-cfb',
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'a1': 'aes-192-cfb',
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'a2': 'aes-256-cfb',
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@ -125,6 +125,9 @@ class OpenSSLCrypto(object):
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ciphers = {
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'aes-128-cbc': (16, 16, OpenSSLCrypto),
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'aes-192-cbc': (24, 16, OpenSSLCrypto),
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'aes-256-cbc': (32, 16, OpenSSLCrypto),
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'aes-128-cfb': (16, 16, OpenSSLCrypto),
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'aes-192-cfb': (24, 16, OpenSSLCrypto),
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'aes-256-cfb': (32, 16, OpenSSLCrypto),
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@ -73,7 +73,7 @@ def EVP_BytesToKey(password, key_len, iv_len):
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class Encryptor(object):
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def __init__(self, key, method):
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def __init__(self, key, method, iv = None):
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self.key = key
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self.method = method
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self.iv = None
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@ -85,8 +85,11 @@ class Encryptor(object):
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method = method.lower()
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self._method_info = self.get_method_info(method)
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if self._method_info:
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self.cipher = self.get_cipher(key, method, 1,
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if iv is None or len(iv) != self._method_info[1]:
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self.cipher = self.get_cipher(key, method, 1,
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random_string(self._method_info[1]))
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else:
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self.cipher = self.get_cipher(key, method, 1, iv)
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else:
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logging.error('method %s not supported' % method)
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sys.exit(1)
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@ -32,7 +32,7 @@ import hmac
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import hashlib
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import shadowsocks
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from shadowsocks import common, lru_cache
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from shadowsocks import common, lru_cache, encrypt
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from shadowsocks.obfsplugin import plain
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from shadowsocks.common import to_bytes, to_str, ord, chr
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@ -48,6 +48,9 @@ def create_auth_sha1_v3(method):
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def create_auth_sha1_v4(method):
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return auth_sha1_v4(method)
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def create_auth_aes128(method):
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return auth_aes128(method)
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obfs_map = {
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'auth_sha1': (create_auth_sha1,),
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'auth_sha1_compatible': (create_auth_sha1,),
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@ -57,6 +60,7 @@ obfs_map = {
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'auth_sha1_v3_compatible': (create_auth_sha1_v3,),
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'auth_sha1_v4': (create_auth_sha1_v4,),
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'auth_sha1_v4_compatible': (create_auth_sha1_v4,),
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'auth_aes128': (create_auth_aes128,),
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}
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def match_begin(str1, str2):
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@ -1048,3 +1052,257 @@ class auth_sha1_v4(verify_base):
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self.decrypt_packet_num += 1
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return (out_buf, sendback)
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class auth_aes128(verify_base):
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def __init__(self, method):
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super(auth_aes128, self).__init__(method)
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self.recv_buf = b''
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self.unit_len = 8100
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self.raw_trans = False
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self.has_sent_header = False
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self.has_recv_header = False
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self.client_id = 0
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self.connection_id = 0
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self.max_time_dif = 60 * 60 * 24 # time dif (second) setting
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self.salt = b"auth_aes128"
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self.no_compatible_method = 'auth_aes128'
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self.extra_wait_size = struct.unpack('>H', os.urandom(2))[0] % 1024
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self.pack_id = 0
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self.recv_id = 0
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def init_data(self):
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return obfs_auth_v2_data()
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def set_server_info(self, server_info):
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self.server_info = server_info
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try:
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max_client = int(server_info.protocol_param)
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except:
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max_client = 64
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self.server_info.data.set_max_client(max_client)
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def rnd_data(self, buf_size):
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if buf_size > 1200:
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return b'\x01'
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if self.pack_id > 4:
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rnd_data = os.urandom(common.ord(os.urandom(1)[0]) % 32)
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elif buf_size > 400:
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rnd_data = os.urandom(common.ord(os.urandom(1)[0]) % 128)
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else:
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rnd_data = os.urandom(struct.unpack('>H', os.urandom(2))[0] % 512)
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if len(rnd_data) < 128:
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return common.chr(len(rnd_data) + 1) + rnd_data
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else:
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return common.chr(255) + struct.pack('<H', len(rnd_data) + 3) + rnd_data
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def pack_data(self, buf):
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data = self.rnd_data(len(buf)) + buf
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data_len = len(data) + 8
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crc = binascii.crc32(struct.pack('<H', data_len)) & 0xFFFF
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data = struct.pack('<H', crc) + data
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data = struct.pack('<H', data_len) + data
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adler32 = (zlib.adler32(data) & 0xFFFFFFFF) ^ self.pack_id
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self.pack_id = (self.pack_id + 1) & 0xFFFFFFFF
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data += struct.pack('<I', adler32)
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return data
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def pack_auth_data(self, auth_data, buf):
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if len(buf) == 0:
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return b''
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if len(buf) > 400:
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rnd_len = common.ord(os.urandom(1)[0]) % 512
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else:
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rnd_len = struct.unpack('<H', os.urandom(2))[0] % 1024
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data = auth_data
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data_len = len(buf) + rnd_len + 16 + 10 + 4
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data = data + struct.pack('<H', data_len) + struct.pack('<H', rnd_len)
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uid = '\x00' * 4
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encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(uid + self.server_info.key)) + self.salt, 'aes-128-cbc', b'\x00' * 16)
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data = uid + encryptor.encrypt(data)[16:]
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data += hmac.new(self.server_info.iv + self.server_info.key, data, hashlib.sha1).digest()[:10]
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data += os.urandom(rnd_len) + buf
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crc = binascii.crc32(struct.pack('<H', data_len)) & 0xFFFF
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data = struct.pack('<H', crc) + data
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return data
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def auth_data(self):
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utc_time = int(time.time()) & 0xFFFFFFFF
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if self.server_info.data.connection_id > 0xFF000000:
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self.server_info.data.local_client_id = b''
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if not self.server_info.data.local_client_id:
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self.server_info.data.local_client_id = os.urandom(4)
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logging.debug("local_client_id %s" % (binascii.hexlify(self.server_info.data.local_client_id),))
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self.server_info.data.connection_id = struct.unpack('<I', os.urandom(4))[0] & 0xFFFFFF
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self.server_info.data.connection_id += 1
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return b''.join([struct.pack('<I', utc_time),
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self.server_info.data.local_client_id,
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struct.pack('<I', self.server_info.data.connection_id)])
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def client_pre_encrypt(self, buf):
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ret = b''
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if not self.has_sent_header:
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head_size = self.get_head_size(buf, 30)
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datalen = min(len(buf), random.randint(0, 31) + head_size)
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ret += self.pack_auth_data(self.auth_data(), buf[:datalen])
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buf = buf[datalen:]
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self.has_sent_header = True
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while len(buf) > self.unit_len:
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ret += self.pack_data(buf[:self.unit_len])
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buf = buf[self.unit_len:]
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ret += self.pack_data(buf)
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return ret
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def client_post_decrypt(self, buf):
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if self.raw_trans:
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return buf
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self.recv_buf += buf
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out_buf = b''
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while len(self.recv_buf) > 4:
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crc = struct.pack('<H', binascii.crc32(self.recv_buf[:2]) & 0xFFFF)
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if crc != self.recv_buf[2:4]:
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raise Exception('client_post_decrypt data uncorrect crc')
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length = struct.unpack('<H', self.recv_buf[:2])[0]
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if length >= 8192 or length < 7:
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self.raw_trans = True
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self.recv_buf = b''
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raise Exception('client_post_decrypt data error')
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if length > len(self.recv_buf):
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break
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if struct.pack('<I', (zlib.adler32(self.recv_buf[:length - 4]) & 0xFFFFFFFF) ^ self.recv_id) != self.recv_buf[length - 4:length]:
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self.raw_trans = True
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self.recv_buf = b''
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raise Exception('client_post_decrypt data uncorrect checksum')
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self.recv_id = (self.recv_id + 1) & 0xFFFFFFFF
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pos = common.ord(self.recv_buf[4])
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if pos < 255:
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pos += 4
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else:
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pos = struct.unpack('<H', self.recv_buf[5:7])[0] + 4
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out_buf += self.recv_buf[pos:length - 4]
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self.recv_buf = self.recv_buf[length:]
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return out_buf
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def server_pre_encrypt(self, buf):
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if self.raw_trans:
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return buf
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ret = b''
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while len(buf) > self.unit_len:
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ret += self.pack_data(buf[:self.unit_len])
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buf = buf[self.unit_len:]
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ret += self.pack_data(buf)
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return ret
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def server_post_decrypt(self, buf):
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if self.raw_trans:
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return (buf, False)
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self.recv_buf += buf
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out_buf = b''
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if not self.has_recv_header:
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if len(self.recv_buf) < 30:
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return (b'', False)
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sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, self.recv_buf[:20], hashlib.sha1).digest()[:10]
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if sha1data != self.recv_buf[20:30]:
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logging.error('auth_aes128 data uncorrect auth HMAC-SHA1 from %s:%d, data %s' % (self.server_info.client, self.server_info.client_port, binascii.hexlify(self.recv_buf)))
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if len(self.recv_buf) < 30 + self.extra_wait_size:
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return (b'', False)
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return self.not_match_return(self.recv_buf)
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user_key = self.recv_buf[:4]
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encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(user_key + self.server_info.key)) + self.salt, 'aes-128-cbc')
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head = encryptor.decrypt(b'\x00' * 16 + self.recv_buf[4:20] + b'\x00') # need an extra byte or recv empty
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length = struct.unpack('<H', head[12:14])[0]
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if len(self.recv_buf) < length:
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return (b'', False)
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utc_time = struct.unpack('<I', head[:4])[0]
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client_id = struct.unpack('<I', head[4:8])[0]
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connection_id = struct.unpack('<I', head[8:12])[0]
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rnd_len = struct.unpack('<H', head[14:16])[0]
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if struct.pack('<I', zlib.adler32(self.recv_buf[:length - 4]) & 0xFFFFFFFF) != self.recv_buf[length - 4:length]:
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logging.info('auth_aes128: checksum error, data %s' % (binascii.hexlify(self.recv_buf[:length]),))
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return self.not_match_return(self.recv_buf)
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time_dif = common.int32(utc_time - (int(time.time()) & 0xffffffff))
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if time_dif < -self.max_time_dif or time_dif > self.max_time_dif:
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logging.info('auth_aes128: wrong timestamp, time_dif %d, data %s' % (time_dif, binascii.hexlify(head),))
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return self.not_match_return(self.recv_buf)
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elif self.server_info.data.insert(client_id, connection_id):
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self.has_recv_header = True
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out_buf = self.recv_buf[30 + rnd_len:length - 4]
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self.client_id = client_id
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self.connection_id = connection_id
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else:
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logging.info('auth_aes128: auth fail, data %s' % (binascii.hexlify(out_buf),))
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return self.not_match_return(self.recv_buf)
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self.recv_buf = self.recv_buf[length:]
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self.has_recv_header = True
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sendback = False
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while len(self.recv_buf) > 4:
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crc = struct.pack('<H', binascii.crc32(self.recv_buf[:2]) & 0xFFFF)
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if crc != self.recv_buf[2:4]:
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self.raw_trans = True
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logging.info('auth_aes128: wrong crc')
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if self.recv_id == 0:
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logging.info('auth_aes128: wrong crc')
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return (b'E', False)
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else:
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raise Exception('server_post_decrype data error')
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length = struct.unpack('<H', self.recv_buf[:2])[0]
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if length >= 8192 or length < 7:
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self.raw_trans = True
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self.recv_buf = b''
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if self.recv_id == 0:
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logging.info('auth_aes128: over size')
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return (b'E', False)
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else:
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raise Exception('server_post_decrype data error')
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if length > len(self.recv_buf):
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break
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if struct.pack('<I', (zlib.adler32(self.recv_buf[:length - 4]) & 0xFFFFFFFF) ^ self.recv_id) != self.recv_buf[length - 4:length]:
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logging.info('auth_aes128: checksum error, data %s' % (binascii.hexlify(self.recv_buf[:length]),))
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self.raw_trans = True
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self.recv_buf = b''
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if self.recv_id == 0:
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return (b'E', False)
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else:
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raise Exception('server_post_decrype data uncorrect checksum')
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self.recv_id = (self.recv_id + 1) & 0xFFFFFFFF
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pos = common.ord(self.recv_buf[4])
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if pos < 255:
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pos += 4
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else:
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pos = struct.unpack('<H', self.recv_buf[5:7])[0] + 4
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out_buf += self.recv_buf[pos:length - 4]
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self.recv_buf = self.recv_buf[length:]
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if pos == length - 4:
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sendback = True
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if out_buf:
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self.server_info.data.update(self.client_id, self.connection_id)
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return (out_buf, sendback)
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def client_udp_pre_encrypt(self, buf):
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return buf + struct.pack('<I', zlib.adler32(buf) & 0xFFFFFFFF)
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def client_udp_post_decrypt(self, buf):
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length = len(buf)
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data = buf[:-4]
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if struct.pack('<I', zlib.adler32(data) & 0xFFFFFFFF) != buf[length - 4:]:
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return b''
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return data
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def server_udp_pre_encrypt(self, buf):
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return buf + struct.pack('<I', zlib.adler32(buf) & 0xFFFFFFFF)
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def server_udp_post_decrypt(self, buf):
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length = len(buf)
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data = buf[:-4]
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if struct.pack('<I', zlib.adler32(data) & 0xFFFFFFFF) != buf[length - 4:]:
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return b''
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return data
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@ -350,11 +350,10 @@ class verify_sha1(verify_base):
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def server_udp_post_decrypt(self, buf):
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if buf and ((ord(buf[0]) & 0x10) == 0x10):
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if len(buf) <= 11:
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return b'E'
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return b''
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sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, buf[:-10], hashlib.sha1).digest()[:10]
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if sha1data != buf[-10:]:
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logging.error('server_udp_post_decrypt data uncorrect auth HMAC-SHA1')
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return b'E'
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return b''
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return to_bytes(chr(ord(buf[0]) & 0xEF)) + buf[1:-10]
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else:
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return buf
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@ -104,6 +104,8 @@ class TCPRelayHandler(object):
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self._remote_udp = False
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self._config = config
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self._dns_resolver = dns_resolver
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self._client_address = local_sock.getpeername()[:2]
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self._accept_address = local_sock.getsockname()[:2]
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# TCP Relay works as either sslocal or ssserver
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# if is_local, this is sslocal
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@ -121,26 +123,30 @@ class TCPRelayHandler(object):
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server_info = obfs.server_info(server.obfs_data)
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server_info.host = config['server']
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server_info.port = server._listen_port
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server_info.client = self._client_address[0]
|
||||
server_info.client_port = self._client_address[1]
|
||||
server_info.protocol_param = ''
|
||||
server_info.obfs_param = config['obfs_param']
|
||||
server_info.iv = self._encryptor.cipher_iv
|
||||
server_info.recv_iv = b''
|
||||
server_info.key = self._encryptor.cipher_key
|
||||
server_info.head_len = 30
|
||||
server_info.tcp_mss = 1440
|
||||
server_info.tcp_mss = 1460
|
||||
self._obfs.set_server_info(server_info)
|
||||
|
||||
self._protocol = obfs.obfs(config['protocol'])
|
||||
server_info = obfs.server_info(server.protocol_data)
|
||||
server_info.host = config['server']
|
||||
server_info.port = server._listen_port
|
||||
server_info.client = self._client_address[0]
|
||||
server_info.client_port = self._client_address[1]
|
||||
server_info.protocol_param = config['protocol_param']
|
||||
server_info.obfs_param = ''
|
||||
server_info.iv = self._encryptor.cipher_iv
|
||||
server_info.recv_iv = b''
|
||||
server_info.key = self._encryptor.cipher_key
|
||||
server_info.head_len = 30
|
||||
server_info.tcp_mss = 1440
|
||||
server_info.tcp_mss = 1460
|
||||
self._protocol.set_server_info(server_info)
|
||||
|
||||
self._redir_list = config.get('redirect', ["0.0.0.0:0"])
|
||||
|
@ -154,8 +160,6 @@ class TCPRelayHandler(object):
|
|||
self._udp_data_send_buffer = b''
|
||||
self._upstream_status = WAIT_STATUS_READING
|
||||
self._downstream_status = WAIT_STATUS_INIT
|
||||
self._client_address = local_sock.getpeername()[:2]
|
||||
self._accept_address = local_sock.getsockname()[:2]
|
||||
self._remote_address = None
|
||||
if 'forbidden_ip' in config:
|
||||
self._forbidden_iplist = config['forbidden_ip']
|
||||
|
|
Loading…
Add table
Reference in a new issue