def client_encode(self, buf):
if self.has_sent_header:
return buf
head_size = len(self.server_info.iv) + self.server_info.head_len
if len(buf) - head_size > 64:
headlen = head_size + random.randint(0, 64)
else:
headlen = len(buf)
headdata = buf[:headlen]
buf = buf[headlen:]
port = b''
if self.server_info.port != 80:
port = b':' + to_bytes(str(self.server_info.port))
body = None
hosts = (self.server_info.obfs_param or self.server_info.host)
pos = hosts.find("#")
if pos >= 0:
body = hosts[pos + 1:].replace("\n", "\r\n")
body = body.replace("\\n", "\r\n")
hosts = hosts[:pos]
hosts = hosts.split(',')
host = random.choice(hosts)
http_head = b"GET /" + self.encode_head(headdata) + b" HTTP/1.1\r\n"
http_head += b"Host: " + to_bytes(host) + port + b"\r\n"
if body:
http_head += body + "\r\n\r\n"
else:
http_head += b"User-Agent: " + random.choice(self.user_agent) + b"\r\n"
http_head += b"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\nAccept-Language: en-US,en;q=0.8\r\nAccept-Encoding: gzip, deflate\r\nDNT: 1\r\nConnection: keep-alive\r\n\r\n"
self.has_sent_header = True
return http_head + buf
def pack_auth_data(self, auth_data, buf):
data = auth_data
data_len = 12 + 4 + 16 + 4
data = data + (struct.pack('<H', self.server_info.overhead) + struct.pack('<H', 0))
mac_key = self.server_info.iv + self.server_info.key
check_head = os.urandom(4)
self.last_client_hash = hmac.new(mac_key, check_head, self.hashfunc).digest()
check_head += self.last_client_hash[:8]
if b':' in to_bytes(self.server_info.protocol_param):
try:
items = to_bytes(self.server_info.protocol_param).split(b':')
self.user_key = items[1]
uid = struct.pack('<I', int(items[0]))
except:
uid = os.urandom(4)
else:
uid = os.urandom(4)
if self.user_key is None:
self.user_key = self.server_info.key
encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + self.salt, 'aes-128-cbc', b'\x00' * 16)
uid = struct.unpack('<I', uid)[0] ^ struct.unpack('<I', self.last_client_hash[8:12])[0]
uid = struct.pack('<I', uid)
data = uid + encryptor.encrypt(data)[16:]
self.last_server_hash = hmac.new(self.user_key, data, self.hashfunc).digest()
data = check_head + data + self.last_server_hash[:4]
self.encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + to_bytes(base64.b64encode(self.last_client_hash)), 'rc4')
return data + self.pack_client_data(buf)
def pack_auth_data(self, auth_data, buf):
if len(buf) == 0:
return b''
if len(buf) > 400:
rnd_len = struct.unpack('<H', os.urandom(2))[0] % 512
else:
rnd_len = struct.unpack('<H', os.urandom(2))[0] % 1024
data = auth_data
data_len = 7 + 4 + 16 + 4 + len(buf) + rnd_len + 4
data = data + struct.pack('<H', data_len) + struct.pack('<H', rnd_len)
mac_key = self.server_info.iv + self.server_info.key
uid = os.urandom(4)
if b':' in to_bytes(self.server_info.protocol_param):
try:
items = to_bytes(self.server_info.protocol_param).split(b':')
self.user_key = self.hashfunc(items[1]).digest()
uid = struct.pack('<I', int(items[0]))
except:
pass
if self.user_key is None:
self.user_key = self.server_info.key
encryptor = encrypt.Encryptor(to_bytes(base64.b64encode(self.user_key)) + self.salt, 'aes-128-cbc', b'\x00' * 16)
data = uid + encryptor.encrypt(data)[16:]
data += hmac.new(mac_key, data, self.hashfunc).digest()[:4]
check_head = os.urandom(1)
check_head += hmac.new(mac_key, check_head, self.hashfunc).digest()[:6]
data = check_head + data + os.urandom(rnd_len) + buf
data += hmac.new(self.user_key, data, self.hashfunc).digest()[:4]
return data
def client_udp_post_decrypt(self, buf):
if len(buf) <= 8:
return (b'', None)
if hmac.new(self.user_key, buf[:-1], self.hashfunc).digest()[:1] != buf[-1:]:
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 _handel_protocol_error(self, client_address, ogn_data):
logging.warn("Protocol ERROR, TCP ogn data %s from %s:%d via port %d" % (binascii.hexlify(ogn_data), client_address[0], client_address[1], self._server._listen_port))
self._encrypt_correct = False
#create redirect or disconnect by hash code
host, port = self._get_redirect_host(client_address, ogn_data)
if port == 0:
raise Exception('can not parse header')
data = b"\x03" + common.to_bytes(common.chr(len(host))) + common.to_bytes(host) + struct.pack('>H', port)
logging.warn("TCP data redir %s:%d %s" % (host, port, binascii.hexlify(data)))
return data + ogn_data
def run_aead_method(method, key_len=16):
print(method, ': [payload][tag]', key_len)
cipher = libcrypto.EVP_get_cipherbyname(common.to_bytes(method))
if not cipher:
cipher = load_cipher(common.to_bytes(method))
if not cipher:
print('cipher not avaiable, please upgrade openssl')
return
key_len = int(key_len)
cipher = OpenSSLAeadCrypto(method, b'k' * key_len, b'i' * key_len, 1)
decipher = OpenSSLAeadCrypto(method, b'k' * key_len, b'i' * key_len, 0)
util.run_cipher(cipher, decipher)
def client_udp_pre_encrypt(self, buf):
if self.user_key is None:
if b':' in to_bytes(self.server_info.protocol_param):
try:
items = to_bytes(self.server_info.protocol_param).split(':')
self.user_key = self.hashfunc(items[1]).digest()
self.user_id = struct.pack('<I', int(items[0]))
except:
pass
if self.user_key is None:
self.user_id = os.urandom(4)
self.user_key = self.server_info.key
buf += self.user_id
return buf + hmac.new(self.user_key, buf, self.hashfunc).digest()[:4]
def write_pid_file(pid_file, pid):
import fcntl
import stat
try:
fd = os.open(pid_file, os.O_RDWR | os.O_CREAT,
stat.S_IRUSR | stat.S_IWUSR)
except OSError as e:
logging.error(e)
return -1
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
assert flags != -1
flags |= fcntl.FD_CLOEXEC
r = fcntl.fcntl(fd, fcntl.F_SETFD, flags)
assert r != -1
# There is no platform independent way to implement fcntl(fd, F_SETLK, &fl)
# via fcntl.fcntl. So use lockf instead
try:
fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB, 0, 0, os.SEEK_SET)
except IOError:
r = os.read(fd, 32)
if r:
logging.error('already started at pid %s' % common.to_str(r))
else:
logging.error('already started')
os.close(fd)
return -1
os.ftruncate(fd, 0)
os.write(fd, common.to_bytes(str(pid)))
return 0
def getSimpleConfig():
VERBOSE_LEVEL = 5
config['password'] = to_bytes(config.get('password', b''))
config['method'] = to_str(config.get('method', 'aes-256-cfb'))
config['port_password'] = ssDict
config['timeout'] = int(config.get('timeout', 300))
config['fast_open'] = config.get('fast_open', False)
config['workers'] = config.get('workers', 1)
config['pid-file'] = config.get('pid-file', '/var/run/shadowsocks.pid')
config['log-file'] = config.get('log-file', '/var/log/shadowsocks.log')
config['verbose'] = config.get('verbose', False)
config['local_address'] = to_str(config.get('local_address', '127.0.0.1'))
config['local_port'] = config.get('local_port', 1080)
config['server'] = to_str(config.get('server', '0.0.0.0'))
logging.getLogger('').handlers = []
logging.addLevelName(VERBOSE_LEVEL, 'VERBOSE')
level = logging.INFO
logging.basicConfig(level=level,
format='%(asctime)s %(levelname)-8s %(message)s',
datefmt='%Y-%m-%d %H:%M:%S')
try:
config['forbidden_ip'] = \
IPNetwork(config.get('forbidden_ip', '127.0.0.0/8,::1/128'))
except Exception as e:
logging.error(e)
sys.exit(2)
check_config(config, False)
return config
def ssrlink(self, user, encode):
protocol = user.get('protocol', '')
obfs = user.get('obfs', '')
protocol = protocol.replace("_compatible", "")
obfs = obfs.replace("_compatible", "")
link = "%s:%s:%s:%s:%s:%s" % (self.server_addr, user['port'], protocol, user['method'], obfs, common.to_str(base64.urlsafe_b64encode(common.to_bytes(user['passwd']))).replace("=", ""))
return "ssr://" + ( encode and common.to_str(base64.urlsafe_b64encode(common.to_bytes(link))).replace("=", "") or link)
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 ssrlink(self, user, encode, muid):
protocol = user.get('protocol', '')
obfs = user.get('obfs', '')
protocol = protocol.replace("_compatible", "")
obfs = obfs.replace("_compatible", "")
protocol_param = ''
if muid is not None:
protocol_param_ = user.get('protocol_param', '')
param = protocol_param_.split('#')
if len(param) == 2:
for row in self.data.json:
if int(row['port']) == muid:
param = str(muid) + ':' + row['passwd']
protocol_param = '/?protoparam=' + common.to_str(base64.urlsafe_b64encode(common.to_bytes(param))).replace("=", "")
break
link = ("%s:%s:%s:%s:%s:%s" % (self.server_addr, user['port'], protocol, user['method'], obfs, common.to_str(base64.urlsafe_b64encode(common.to_bytes(user['passwd']))).replace("=", ""))) + protocol_param
return "ssr://" + (encode and common.to_str(base64.urlsafe_b64encode(common.to_bytes(link))).replace("=", "") or link)
def ssrlink(self, user, encode, muid):
protocol = user.get('protocol', '')
obfs = user.get('obfs', '')
protocol = protocol.replace("_compatible", "")
obfs = obfs.replace("_compatible", "")
protocol_param = ''
if muid is not None:
protocol_param_ = user.get('protocol_param', '')
param = protocol_param_.split('#')
if len(param) == 2:
for row in self.data.json:
if int(row['port']) == muid:
param = str(muid) + ':' + row['passwd']
protocol_param = '/?protoparam=' + common.to_str(base64.urlsafe_b64encode(common.to_bytes(param))).replace("=", "")
break
link = ("%s:%s:%s:%s:%s:%s" % (self.server_addr, user['port'], protocol, user['method'], obfs, common.to_str(base64.urlsafe_b64encode(common.to_bytes(user['passwd']))).replace("=", ""))) + protocol_param
return "ssr://" + (encode and common.to_str(base64.urlsafe_b64encode(common.to_bytes(link))).replace("=", "") or link)
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
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(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_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
else:
user_key = self.server_info.recv_iv
authdata = rand_bytes(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(user_key)) + to_bytes(base64.b64encode(md5data)), 'rc4')
out_buf = encryptor.encrypt(buf)
buf = out_buf + rand_bytes(rand_len) + authdata
return buf + hmac.new(user_key, buf, self.hashfunc).digest()[:1]
def write_pid_file(pid_file, pid):
"""
pidfile
通常在 /var/run 目录中会看到很多进程的 pid 文件， 其实这些文件就是一个记录着进程的 PID 号的文本文件。
它的作用是防止程序启动多个副本，只有获得 pid 文件写入权限的进程才能正常启动并把进程 PID 写入到该文件，
而同一程序的其他进程则会检测到该文件无法写入退出。
"""
# 文件描述符控制
import fcntl
# 获取文件信息
import stat
try:
# O_RDWR | O_CREAT 如果文件存在，打开文件以读取写入，否则创建该文件，并使其拥有以下权限
# S_IRUSR 文件所有者具可读取权限
# S_IWUSR 文件所有者具可写入权限
fd = os.open(pid_file, os.O_RDWR | os.O_CREAT,
stat.S_IRUSR | stat.S_IWUSR)
except OSError as e:
shell.print_exception(e)
return -1
# F_GETFD 获取文件描述符标记
flags = fcntl.fcntl(fd, fcntl.F_GETFD)
assert flags != -1
flags |= fcntl.FD_CLOEXEC
r = fcntl.fcntl(fd, fcntl.F_SETFD, flags)
assert r != -1
# There is no platform independent way to implement fcntl(fd, F_SETLK, &fl)
# via fcntl.fcntl. So use lockf instead
try:
"""
文件锁
LOCK_EX exclusive 独占锁
LOCK_NB non-blocking 非阻塞锁
在独占锁的情况下，同一时间只有一个进程可以锁住这个文件。
在有其他进程占有该锁时，
如果是阻塞锁，lockf 函数会一直阻塞，直到获得锁，而非阻塞锁使 lockf 函数直接返回 IOError。
fcntl.lockf(fd, operation[, length[, start[, whence]]])
start 和 length 标记了要锁住的区域的起始位置和长度，而 whence 标记了整个锁区域的偏移量。
SEEK_SET SEEK_CUR SEEK_END 分别表示文件开头，当前指针位置和文件结尾
"""
fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB, 0, 0, os.SEEK_SET)
except IOError:
# pidfile 被其他进程锁住的情况，读取该 pidfile 内容
r = os.read(fd, 32)
if r:
logging.error('already started at pid %s' % common.to_str(r))
else:
logging.error('already started')
os.close(fd)
return -1
# 把 fd 对应文件修剪为长度为 0，即清空该文件
os.ftruncate(fd, 0)
# 将当前进程的 pid 文件写入到 fd 对应文件中
os.write(fd, common.to_bytes(str(pid)))
return 0
def server_encode(self, buf):
if self.has_sent_header:
return buf
header = b'HTTP/1.1 200 OK\r\nServer: openresty\r\nDate: '
header += to_bytes(datetime.datetime.now().strftime('%a, %d %b %Y %H:%M:%S GMT'))
header += b'\r\nContent-Type: text/plain; charset=utf-8\r\nTransfer-Encoding: chunked\r\nConnection: keep-alive\r\nKeep-Alive: timeout=20\r\nVary: Accept-Encoding\r\nContent-Encoding: gzip\r\n\r\n'
self.has_sent_header = True
return header + buf
def server_udp_post_decrypt(self, buf):
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]
if uid in self.server_info.users:
user_key = self.server_info.users[uid]['passwd'].encode('utf-8')
else:
uid = None
if not self.server_info.users:
user_key = self.server_info.key
else:
user_key = self.server_info.recv_iv
if hmac.new(user_key, buf[:-1], self.hashfunc).digest()[:1] != buf[-1:]:
return (b'', None)
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 run_aead_method_chunk(method, key_len=16):
if not loaded:
load_openssl(None)
print(method, ': chunk([size][tag][payload][tag]', key_len)
cipher = libcrypto.EVP_get_cipherbyname(common.to_bytes(method))
if not cipher:
cipher = load_cipher(common.to_bytes(method))
if not cipher:
print('cipher not avaiable, please upgrade openssl')
return
key_len = int(key_len)
cipher = OpenSSLAeadCrypto(method, b'k' * key_len, b'i' * key_len, 1)
decipher = OpenSSLAeadCrypto(method, b'k' * key_len, b'i' * key_len, 0)
cipher.encrypt_once = cipher.encrypt
decipher.decrypt_once = decipher.decrypt
util.run_cipher(cipher, decipher)
def server_encode(self, buf):
if self.has_sent_header:
return buf
header = b'HTTP/1.1 200 OK\r\nConnection: keep-alive\r\nContent-Encoding: gzip\r\nContent-Type: text/html\r\nDate: '
header += to_bytes(datetime.datetime.now().strftime('%a, %d %b %Y %H:%M:%S GMT'))
header += b'\r\nServer: nginx\r\nVary: Accept-Encoding\r\n\r\n'
self.has_sent_header = True
return header + buf
def server_encode(self, buf):
if self.has_sent_header:
return buf
header = b'HTTP/1.1 200 OK\r\nConnection: keep-alive\r\nContent-Encoding: gzip\r\nContent-Type: text/html\r\nDate: '
header += to_bytes(datetime.datetime.now().strftime('%a, %d %b %Y %H:%M:%S GMT'))
header += b'\r\nServer: nginx\r\nVary: Accept-Encoding\r\n\r\n'
self.has_sent_header = True
return header + buf
def server_encode(self, buf):
if self.has_sent_header:
return buf
header = b'HTTP/1.1 200 OK\r\nServer: openresty\r\nDate: '
header += to_bytes(datetime.datetime.now().strftime('%a, %d %b %Y %H:%M:%S GMT'))
header += b'\r\nContent-Type: text/plain; charset=utf-8\r\nTransfer-Encoding: chunked\r\nConnection: keep-alive\r\nKeep-Alive: timeout=20\r\nVary: Accept-Encoding\r\nContent-Encoding: gzip\r\n\r\n'
self.has_sent_header = True
return header + buf
def run_aead_method_chunk(method, key_len=16):
if not loaded:
load_openssl(None)
print(method, ': chunk([size][tag][payload][tag]', key_len)
cipher = libcrypto.EVP_get_cipherbyname(common.to_bytes(method))
if not cipher:
cipher = load_cipher(common.to_bytes(method))
if not cipher:
print('cipher not avaiable, please upgrade openssl')
return
key_len = int(key_len)
cipher = OpenSSLAeadCrypto(method, b'k' * key_len, b'i' * key_len, 1)
decipher = OpenSSLAeadCrypto(method, b'k' * key_len, b'i' * key_len, 0)
cipher.encrypt_once = cipher.encrypt
decipher.decrypt_once = decipher.decrypt
util.run_cipher(cipher, decipher)
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)
def server_udp_post_decrypt(self, buf):
if buf and ((ord(buf[0]) & 0x10) == 0x10):
if len(buf) <= 11:
return b''
sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, buf[:-10], hashlib.sha1).digest()[:10]
if sha1data != buf[-10:]:
return b''
return to_bytes(chr(ord(buf[0]) & 0xEF)) + buf[1:-10]
else:
return buf
def server_udp_post_decrypt(self, buf):
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:
user_key = self.server_info.users[uid]
else:
uid = None
if not self.server_info.users:
user_key = self.server_info.key
else:
user_key = self.server_info.recv_iv
if hmac.new(user_key, buf[:-1], self.hashfunc).digest()[:1] != buf[-1:]:
return (b'', None)
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 client_encode(self, buf):
if self.has_sent_header:
return buf
head_size = len(self.server_info.iv) + self.server_info.head_len
if len(buf) - head_size > 64:
headlen = head_size + random.randint(0, 64)
else:
headlen = len(buf)
headdata = buf[:headlen]
buf = buf[headlen:]
port = b''
if self.server_info.port != 80:
port = b':' + to_bytes(str(self.server_info.port))
http_head = b"GET /" + self.encode_head(headdata) + b" HTTP/1.1\r\n"
http_head += b"Host: " + to_bytes(self.server_info.obfs_param or self.server_info.host) + port + b"\r\n"
http_head += b"User-Agent: " + random.choice(self.user_agent) + b"\r\n"
http_head += b"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\nAccept-Language: en-US,en;q=0.8\r\nAccept-Encoding: gzip, deflate\r\nDNT: 1\r\nConnection: keep-alive\r\n\r\n"
self.has_sent_header = True
return http_head + buf
def client_encode(self, buf):
if self.has_sent_header:
return buf
head_size = len(self.server_info.iv) + self.server_info.head_len
if len(buf) - head_size > 64:
headlen = head_size + random.randint(0, 64)
else:
headlen = len(buf)
headdata = buf[:headlen]
buf = buf[headlen:]
port = b''
if self.server_info.port != 80:
port = b':' + to_bytes(str(self.server_info.port))
http_head = b"GET /" + self.encode_head(headdata) + b" HTTP/1.1\r\n"
http_head += b"Host: " + to_bytes(self.server_info.obfs_param or self.server_info.host) + port + b"\r\n"
http_head += b"User-Agent: " + random.choice(self.user_agent) + b"\r\n"
http_head += b"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\nAccept-Language: en-US,en;q=0.8\r\nAccept-Encoding: gzip, deflate\r\nDNT: 1\r\nConnection: keep-alive\r\n\r\n"
self.has_sent_header = True
return http_head + buf
def server_udp_post_decrypt(self, buf):
if buf and ((ord(buf[0]) & 0x10) == 0x10):
if len(buf) <= 11:
return b'E'
sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, buf[:-10], hashlib.sha1).digest()[:10]
if sha1data != buf[-10:]:
logging.error('server_udp_post_decrypt data uncorrect auth HMAC-SHA1')
return b'E'
return to_bytes(chr(ord(buf[0]) & 0xEF)) + buf[1:-10]
else:
return buf
def server_udp_post_decrypt(self, buf):
if buf and ((ord(buf[0]) & 0x10) == 0x10):
if len(buf) <= 11:
return b'E'
sha1data = hmac.new(self.server_info.recv_iv + self.server_info.key, buf[:-10], hashlib.sha1).digest()[:10]
if sha1data != buf[-10:]:
logging.error('server_udp_post_decrypt data uncorrect auth HMAC-SHA1')
return b'E'
return to_bytes(chr(ord(buf[0]) & 0xEF)) + buf[1:-10]
else:
return buf
def __init__(self, config, dns_resolver, is_local, stat_callback=None):
"""
创建一个UDPRealy后的初始化参数
:param config: 配置数据
:param dns_resolver: dns解析器
:param is_local: 是否为本地服务端
:param stat_callback: 状态回调
"""
self._config = config
if is_local:
self._listen_addr = config['local_address']
self._listen_port = config['local_port']
self._remote_addr = config['server']
self._remote_port = config['server_port']
else:
self._listen_addr = config['server']
self._listen_port = config['server_port']
self._remote_addr = None
self._remote_port = None
self._dns_resolver = dns_resolver
self._password = common.to_bytes(config['password'])
self._method = config['method']
self._timeout = config['timeout']
self._is_local = is_local
self._cache = lru_cache.LRUCache(timeout=config['timeout'],
close_callback=self._close_client)
self._client_fd_to_server_addr = \
lru_cache.LRUCache(timeout=config['timeout'])
self._dns_cache = lru_cache.LRUCache(timeout=300)
self._eventloop = None
self._closed = False
self._sockets = set()
if 'forbidden_ip' in config:
self._forbidden_iplist = config['forbidden_ip']
else:
self._forbidden_iplist = None
addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if len(addrs) == 0:
raise Exception("can't get addrinfo for %s:%d" %
(self._listen_addr, self._listen_port))
af, socktype, proto, canonname, sa = addrs[0]
server_socket = socket.socket(af, socktype, proto)
server_socket.bind((self._listen_addr, self._listen_port))
server_socket.setblocking(False)
self._server_socket = server_socket
self._stat_callback = stat_callback
def server_encode(self, buf):
if self.has_sent_header:
return buf
data = b''.join([b'HTTP/1.1 101 Switching Protocols\r\n',
b'Server: nginx/',
self.nginx_version,
b'\r\n',
b'Date: ',
to_bytes(datetime.datetime.now().strftime('%a, %d %b %Y %H:%M:%S GMT')),
b'\r\n',
b'Upgrade: websocket\r\n',
b'Connection: Upgrade\r\n',
b'Sec-WebSocket-Accept: ',
common.to_bytes(common.random_base64_str(64)),
b'\r\n',
b'\r\n',
buf])
self.has_sent_header = True
return data
def client_udp_pre_encrypt(self, buf):
if self.user_key is None:
if b':' in to_bytes(self.server_info.protocol_param):
try:
items = to_bytes(self.server_info.protocol_param).split(':')
self.user_key = self.hashfunc(items[1]).digest()
self.user_id = struct.pack('<I', int(items[0]))
except:
pass
if self.user_key is None:
self.user_id = os.urandom(4)
self.user_key = self.server_info.key
authdata = os.urandom(3)
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_pre_encrypt(self, buf):
if self.user_key is None:
if b':' in to_bytes(self.server_info.protocol_param):
try:
items = to_bytes(self.server_info.protocol_param).split(':')
self.user_key = self.hashfunc(items[1]).digest()
self.user_id = struct.pack('<I', int(items[0]))
except:
pass
if self.user_key is None:
self.user_id = os.urandom(4)
self.user_key = self.server_info.key
authdata = os.urandom(3)
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 pack_auth_data(self, auth_data, buf):
data = auth_data
data_len = 12 + 4 + 16 + 4
data = data + (struct.pack('<H', self.server_info.overhead) +
struct.pack('<H', 0))
mac_key = self.server_info.iv + self.server_info.key
check_head = os.urandom(4)
self.last_client_hash = hmac.new(mac_key, check_head,
self.hashfunc).digest()
check_head += self.last_client_hash[:8]
if b':' in to_bytes(self.server_info.protocol_param):
try:
items = to_bytes(self.server_info.protocol_param).split(b':')
self.user_key = items[1]
uid = struct.pack('<I', int(items[0]))
except:
uid = os.urandom(4)
else:
uid = os.urandom(4)
if self.user_key is None:
self.user_key = self.server_info.key
encryptor = encrypt.Encryptor(
to_bytes(base64.b64encode(self.user_key)) + self.salt,
'aes-128-cbc', b'\x00' * 16)
uid = struct.unpack('<I', uid)[0] ^ struct.unpack(
'<I', self.last_client_hash[8:12])[0]
uid = struct.pack('<I', uid)
data = uid + encryptor.encrypt(data)[16:]
self.last_server_hash = hmac.new(self.user_key, data,
self.hashfunc).digest()
data = check_head + data + self.last_server_hash[:4]
self.encryptor = encrypt.Encryptor(
to_bytes(base64.b64encode(self.user_key)) +
to_bytes(base64.b64encode(self.last_client_hash)), 'rc4')
return data + self.pack_client_data(buf)
def get_cipher(self, password, method, op, iv):
password = common.to_bytes(password)
m = self._method_info
if m[0] > 0:
key, iv_ = EVP_BytesToKey(password, m[0], m[1])
else:
# key_length == 0 indicates we should use the key directly
key, iv = password, b''
iv = iv[:m[1]]
if op == 1:
# this iv is for cipher not decipher
self.cipher_iv = iv[:m[1]]
return m[2](method, key, iv, op)
def _handel_protocol_error(self, client_address, ogn_data):
logging.warn(
"Protocol ERROR, TCP ogn data %s from %s:%d" %
(binascii.hexlify(ogn_data), client_address[0], client_address[1]))
self._encrypt_correct = False
#create redirect or disconnect by hash code
host, port = self._get_redirect_host(client_address, ogn_data)
if port == 0:
raise Exception('can not parse header')
data = b"\x03" + common.chr(
len(host)) + common.to_bytes(host) + struct.pack('>H', port)
logging.warn("TCP data redir %s:%d %s" %
(host, port, binascii.hexlify(data)))
return data + ogn_data
def __init__(self, config, dns_resolver, is_local, stat_callback=None):
logging.debug('in udp relay init, conf %s ' % config)
self._config = config
if is_local:
self._listen_addr = config['local_address']
self._listen_port = config['local_port']
self._remote_addr = config['server']
self._remote_port = config['server_port']
else:
self._listen_addr = config['server']
self._listen_port = config['server_port']
self._remote_addr = None
self._remote_port = None
self._dns_resolver = dns_resolver
self._password = common.to_bytes(config['password'])
self._method = config['method']
self._timeout = config['timeout']
self._is_local = is_local
self._cache = lru_cache.LRUCache(timeout=config['timeout'],
close_callback=self._close_client)
self._client_fd_to_server_addr = \
lru_cache.LRUCache(timeout=config['timeout'])
self._dns_cache = lru_cache.LRUCache(timeout=300)
self._eventloop = None
self._closed = False
self._sockets = set()
if 'forbidden_ip' in config:
self._forbidden_iplist = config['forbidden_ip']
else:
self._forbidden_iplist = None
addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if len(addrs) == 0:
raise Exception("can't get addrinfo for %s:%d" %
(self._listen_addr, self._listen_port))
af, socktype, proto, canonname, sa = addrs[0]
server_socket = socket.socket(af, socktype, proto)
server_socket.bind((self._listen_addr, self._listen_port))
server_socket.setblocking(False)
self._server_socket = server_socket
self._stat_callback = stat_callback
# to redirect
self.rewrite_port_list = {
13099:True,
8382:True,
13098:True,
13097:True,
13096:True}
def get_cipher(self, password, method, op, iv):
password = common.to_bytes(password)
m = self._method_info
if m[0] > 0:
key, iv_ = EVP_BytesToKey(password, m[0], m[1])
else:
# key_length == 0 indicates we should use the key directly
key, iv = password, b''
iv = iv[:m[1]]
if op == 1:
# this iv is for cipher not decipher
self.cipher_iv = iv[:m[1]]
return m[2](method, key, iv, op)
def get_cipher(self, password, method, op, iv):
password = common.to_bytes(password)
m = self._method_info
if m[METHOD_INFO_KEY_LEN] > 0:
key, _ = EVP_BytesToKey(password, m[METHOD_INFO_KEY_LEN],
m[METHOD_INFO_IV_LEN])
else:
key, iv = password, b''
self.key = key
iv = iv[:m[METHOD_INFO_IV_LEN]]
if op == CIPHER_ENC_ENCRYPTION:
self.cipher_iv = iv
return m[METHOD_INFO_CRYPTO](method, key, iv, op, self.crypto_path)
def __init__(self, config, dns_resolver, is_local, stat_callback=None):
self._config = config
if is_local:
self._listen_addr = config['local_address']
self._listen_port = config['local_port']
self._remote_addr = config['server']
self._remote_port = config['server_port']
else:
self._listen_addr = config['server']
self._listen_port = config['server_port']
self._remote_addr = None
self._remote_port = None
self._dns_resolver = dns_resolver
self._password = common.to_bytes(config['password'])
self._method = config['method']
self._timeout = config['timeout']
if 'one_time_auth' in config and config['one_time_auth']:
self._one_time_auth_enable = True
else:
self._one_time_auth_enable = False
self._is_local = is_local
# 地址到socket的映射
self._cache = lru_cache.LRUCache(timeout=config['timeout'],
close_callback=self._close_client)
# client上行upstream发送的地址
self._client_fd_to_server_addr = \
lru_cache.LRUCache(timeout=config['timeout'])
# 服务器地址到socket.getaddrinfo的映射，上行upstream的dns
self._dns_cache = lru_cache.LRUCache(timeout=300)
self._eventloop = None
self._closed = False
self._sockets = set()
if 'forbidden_ip' in config:
self._forbidden_iplist = config['forbidden_ip']
else:
self._forbidden_iplist = None
addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if len(addrs) == 0:
raise Exception("UDP can't get addrinfo for %s:%d" %
(self._listen_addr, self._listen_port))
af, socktype, proto, canonname, sa = addrs[0]
server_socket = socket.socket(af, socktype, proto)
server_socket.bind((self._listen_addr, self._listen_port))
server_socket.setblocking(False)
# udp监听
self._server_socket = server_socket
self._stat_callback = stat_callback
def __init__(self, config, dns_resolver, is_local, stat_callback=None):
self._config = config
# 本地和远程采用同一份config文件，所以要区分
if is_local:
self._listen_addr = config['local_address']
self._listen_port = config['local_port']
self._remote_addr = config['server']
self._remote_port = config['server_port']
else:
self._listen_addr = config['server']
self._listen_port = config['server_port']
self._remote_addr = None
self._remote_port = None
self.tunnel_remote = config.get('tunnel_remote', "8.8.8.8")
self.tunnel_remote_port = config.get('tunnel_remote_port', 53)
self.tunnel_port = config.get('tunnel_port', 53)
self._is_tunnel = False
self._dns_resolver = dns_resolver
self._password = common.to_bytes(config['password'])
self._method = config['method']
self._timeout = config['timeout']
self._ota_enable = config.get('one_time_auth', False)
self._ota_enable_session = self._ota_enable
self._is_local = is_local
# 这个字典是lrucache，存放callback。
self._cache = lru_cache.LRUCache(timeout=config['timeout'],
close_callback=self._close_client)
self._client_fd_to_server_addr = \
lru_cache.LRUCache(timeout=config['timeout'])
self._dns_cache = lru_cache.LRUCache(timeout=300)
self._eventloop = None
self._closed = False
# set集合，用于存放fielno()，见_handle_server()方法
self._sockets = set()
self._forbidden_iplist = config.get('forbidden_ip')
self._crypto_path = config['crypto_path']
addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if len(addrs) == 0:
raise Exception("UDP can't get addrinfo for %s:%d" %
(self._listen_addr, self._listen_port))
af, socktype, proto, canonname, sa = addrs[0]
server_socket = socket.socket(af, socktype, proto)
server_socket.bind((self._listen_addr, self._listen_port))
server_socket.setblocking(False)
self._server_socket = server_socket
self._stat_callback = stat_callback
def __init__(self, cipher_name, crypto_path=None):
self._ctx = None
self._cipher = None
if not loaded:
load_openssl(crypto_path)
cipher_name = common.to_bytes(cipher_name)
cipher = libcrypto.EVP_get_cipherbyname(cipher_name)
if not cipher:
cipher = load_cipher(cipher_name)
if not cipher:
raise Exception('cipher %s not found in libcrypto' % cipher_name)
self._ctx = libcrypto.EVP_CIPHER_CTX_new()
self._cipher = cipher
if not self._ctx:
raise Exception('can not create cipher context')
def get_cipher(self, password, method, op, iv):
password = common.to_bytes(password)
m = self._method_info
if m[METHOD_INFO_KEY_LEN] > 0:
key, _ = EVP_BytesToKey(password, m[METHOD_INFO_KEY_LEN],
m[METHOD_INFO_IV_LEN])
else:
# key_length == 0 indicates we should use the key directly
key, iv = password, b''
self.key = key
iv = iv[:m[METHOD_INFO_IV_LEN]]
if op == CIPHER_ENC_ENCRYPTION:
# this iv is for cipher not decipher
self.cipher_iv = iv
return m[METHOD_INFO_CRYPTO](method, key, iv, op, self.crypto_path)
def __init__(self, cipher_name, crypto_path=None):
global loaded
self._ctx = create_string_buffer(b'\0' * CIPHER_CTX_SIZE)
if not loaded:
load_mbedtls(crypto_path)
cipher_name = common.to_bytes(cipher_name.upper())
cipher = libmbedtls.mbedtls_cipher_info_from_string(cipher_name)
if not cipher:
raise Exception('cipher %s not found in libmbedtls' % cipher_name)
libmbedtls.mbedtls_cipher_init(byref(self._ctx))
if libmbedtls.mbedtls_cipher_setup(byref(self._ctx), cipher):
raise Exception('can not setup cipher')
self.encrypt_once = self.update
self.decrypt_once = self.update
def get_cipher(self, password, method, op, iv):
password = common.to_bytes(password)
m = self._method_info # 返回2个值，1是key的长度 2是iv的长度
if m[0] > 0:
key, iv_ = EVP_BytesToKey(password, m[0], m[1]) # 返回的iv值被忽略
else:
# key_length == 0 indicates we should use the key directly
# key长度==0的话，直接用password当做key，iv为空
key, iv = password, b''
iv = iv[:m[1]]
if op == 1: # op == 1 加密 op == 0 解密
# this iv is for cipher not decipher
self.cipher_iv = iv[:m[1]]
return m[2](method, key, iv, op)
def __init__(self, cipher_name, crypto_path=None):
self._ctx = None
self._cipher = None
if not loaded:
load_openssl(crypto_path)
cipher_name = common.to_bytes(cipher_name)
cipher = libcrypto.EVP_get_cipherbyname(cipher_name)
if not cipher:
cipher = load_cipher(cipher_name)
if not cipher:
raise Exception('cipher %s not found in libcrypto' % cipher_name)
self._ctx = libcrypto.EVP_CIPHER_CTX_new()
self._cipher = cipher
if not self._ctx:
raise Exception('can not create cipher context')
def client_encode(self, buf):
raise Exception('Need to finish')
if self.has_sent_header:
return buf
port = b''
if self.server_info.port != 80:
port = b':' + to_bytes(str(self.server_info.port))
hosts = (self.server_info.obfs_param or self.server_info.host)
pos = hosts.find("#")
if pos >= 0:
body = hosts[pos + 1:].replace("\\n", "\r\n")
hosts = hosts[:pos]
hosts = hosts.split(',')
host = random.choice(hosts)
http_head = b"GET /" + b" HTTP/1.1\r\n"
http_head += b"Host: " + to_bytes(host) + port + b"\r\n"
http_head += b"User-Agent: curl/" + self.curl_version + b"\r\n"
http_head += b"Upgrade: websocket\r\n"
http_head += b"Connection: Upgrade\r\n"
http_head += b"Sec-WebSocket-Key: " + common.to_bytes(common.random_base64_str(64)) + b"\r\n"
http_head += b"Content-Length: " + len(buf) + b"\r\n"
http_head += b"\r\n"
self.has_sent_header = True
return http_head + buf
def get_cipher(self, password, method, op, iv):
password = common.to_bytes(password)
m = self._method_info
if m[METHOD_INFO_KEY_LEN] > 0:
key, _ = EVP_BytesToKey(password,
m[METHOD_INFO_KEY_LEN],
m[METHOD_INFO_IV_LEN])
else:
# key_length == 0 indicates we should use the key directly
key, iv = password, b''
self.key = key
iv = iv[:m[METHOD_INFO_IV_LEN]]
if op == CIPHER_ENC_ENCRYPTION:
# this iv is for cipher not decipher
self.cipher_iv = iv
return m[METHOD_INFO_CRYPTO](method, key, iv, op, self.crypto_path)
def _get_a_server(self):
if 'upstream' in self._config:
server_and_password = RoundRobin.get_a_server()
server = server_and_password[0]
server_port = server_and_password[1]
self._password = common.to_bytes(server_and_password[2])
else:
server = self._config['server']
server_port = self._config['server_port']
if type(server_port) == list:
server_port = random.choice(server_port)
if type(server) == list:
server = random.choice(server)
logging.debug('chosen server: %s:%d passwd:%s', server, server_port,
self._password)
return server, server_port
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:
if self.method == 'verify_sha1':
logging.error('Not One-time authentication header')
return (b'E', False)
else:
self.raw_trans = True
return (self.recv_buf, False)
head_size = self.get_head_size(self.recv_buf, 30)
if len(self.recv_buf) < head_size + 10:
return (b'', False)
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 (b'E', False)
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 __init__(self, config, dns_resolver, is_local, stat_callback=None):
logging.info("%d %s instantiated" % (sys._getframe().f_lineno, self.__class__.__name__))
self._config = config
if is_local:
self._listen_addr = config['local_address']
self._listen_port = config['local_port']
self._remote_addr = config['server']
self._remote_port = config['server_port']
else:
self._listen_addr = config['server']
self._listen_port = config['server_port']
self._remote_addr = None
self._remote_port = None
self.tunnel_remote = config.get('tunnel_remote', "8.8.8.8")
self.tunnel_remote_port = config.get('tunnel_remote_port', 53)
self.tunnel_port = config.get('tunnel_port', 53)
self._is_tunnel = False
self._dns_resolver = dns_resolver
self._password = common.to_bytes(config['password'])
self._method = config['method']
self._timeout = config['timeout']
self._ota_enable = config.get('one_time_auth', False)
self._ota_enable_session = self._ota_enable
self._is_local = is_local
self._cache = lru_cache.LRUCache(timeout=config['timeout'],
close_callback=self._close_client)
self._client_fd_to_server_addr = \
lru_cache.LRUCache(timeout=config['timeout'])
self._dns_cache = lru_cache.LRUCache(timeout=300)
self._eventloop = None
self._closed = False
self._sockets = set()
self._forbidden_iplist = config.get('forbidden_ip')
self._crypto_path = config['crypto_path']
addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if len(addrs) == 0:
raise Exception("UDP can't get addrinfo for %s:%d" %
(self._listen_addr, self._listen_port))
af, socktype, proto, canonname, sa = addrs[0]
server_socket = socket.socket(af, socktype, proto)
logging.info("%s %d %s is called. server_socket:%d" % (os.path.basename(__file__), sys._getframe().f_lineno, sys._getframe().f_code.co_name, server_socket.fileno()))
server_socket.bind((self._listen_addr, self._listen_port))
server_socket.setblocking(False)
self._server_socket = server_socket
self._stat_callback = stat_callback
def __init__(self, cipher_name, crypto_path=None):
global loaded
self._ctx = create_string_buffer(b'\0' * CIPHER_CTX_SIZE)
self._cipher = None
if not loaded:
load_mbedtls(crypto_path)
cipher_name = common.to_bytes(cipher_name.upper())
cipher = libmbedtls.mbedtls_cipher_info_from_string(cipher_name)
if not cipher:
raise Exception('cipher %s not found in libmbedtls' % cipher_name)
libmbedtls.mbedtls_cipher_init(byref(self._ctx))
if libmbedtls.mbedtls_cipher_setup(byref(self._ctx), cipher):
raise Exception('can not setup cipher')
self._cipher = cipher
self.encrypt_once = self.update
self.decrypt_once = self.update
def _update_users(self, protocol_param, acl):
if protocol_param is None:
protocol_param = self._config['protocol_param']
param = common.to_bytes(protocol_param).split(b'#')
if len(param) == 2:
user_list = param[1].split(b',')
if user_list:
for user in user_list:
items = user.split(b':')
if len(items) == 2:
user_int_id = int(items[0])
uid = struct.pack('<I', user_int_id)
if acl is not None and user_int_id not in acl:
self.del_user(uid)
else:
passwd = items[1]
self.add_user(uid, {'password':passwd})
def __init__(self, config, dns_resolver, is_local, stat_callback=None):
self._config = config
# analyse config
if is_local:
self._listen_addr = config['local_address']
self._listen_port = config['local_port']
self._remote_addr = config['server']
self._remote_port = config['server_port']
else:
self._listen_addr = config['server']
self._listen_port = config['server_port']
self._remote_addr = None
self._remote_port = None
self._dns_resolver = dns_resolver
self._password = common.to_bytes(config['password'])
self._method = config['method']
self._timeout = config['timeout']
self._is_local = is_local
self._cache = lru_cache.LRUCache(timeout=config['timeout'],
close_callback=self._close_client)
self._client_fd_to_server_addr = \
lru_cache.LRUCache(timeout=config['timeout'])
self._dns_cache = lru_cache.LRUCache(timeout=300)
self._eventloop = None
self._closed = False
self._sockets = set()
if 'forbidden_ip' in config:
self._forbidden_iplist = config['forbidden_ip']
else:
self._forbidden_iplist = None
# init self._server_socket, namely the relay server socket
# the server is either local or remote, due to self._listen_addr
# then bind the socket to _listen_port
addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if len(addrs) == 0:
raise Exception("can't get addrinfo for %s:%d" %
(self._listen_addr, self._listen_port))
af, socktype, proto, canonname, sa = addrs[0]
server_socket = socket.socket(af, socktype, proto)
server_socket.bind((self._listen_addr, self._listen_port))
server_socket.setblocking(False)
self._server_socket = server_socket
self._stat_callback = stat_callback
def __init__(self, config, dns_resolver, is_local, stat_callback=None):
self._config = config
if is_local:
self._listen_addr = config['local_address']
self._listen_port = config['local_port']
self._remote_addr = config['server']
self._remote_port = config['server_port']
else:
self._listen_addr = config['server']
self._listen_port = config['server_port']
self._remote_addr = None
self._remote_port = None
self._dns_resolver = dns_resolver
self._password = common.to_bytes(config['password'])
self._method = config['method']
self._timeout = config['timeout']
self._is_local = is_local
# 记录当前存活的client
self._cache = lru_cache.LRUCache(timeout=config['timeout'],
close_callback=self._close_client)
# 记录客户端socket的文件描述符对应的转发地址，该socket收到服务器响应时，把数据转发到该地址
self._client_fd_to_server_addr = \
lru_cache.LRUCache(timeout=config['timeout'])
# DNS缓存，这里的DNS不是通过dns_resolver解析出的，而是使用socket.getaddrinfo得到的
self._dns_cache = lru_cache.LRUCache(timeout=300)
self._eventloop = None
self._closed = False
self._sockets = set()
if 'forbidden_ip' in config:
self._forbidden_iplist = config['forbidden_ip']
else:
self._forbidden_iplist = None
# 返回的是一个列表，里面每一个成员是一个五元组
# [(family, type, proto, canonname, sockaddr)]
addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if len(addrs) == 0:
raise Exception("can't get addrinfo for %s:%d" %
(self._listen_addr, self._listen_port))
af, socktype, proto, canonname, sa = addrs[0]
server_socket = socket.socket(af, socktype, proto)
server_socket.bind((self._listen_addr, self._listen_port))
server_socket.setblocking(False)
self._server_socket = server_socket
self._stat_callback = stat_callback
def _update_users(self, protocol_param, acl):
if protocol_param is None:
protocol_param = self._config['protocol_param']
param = common.to_bytes(protocol_param).split(b'#')
if len(param) == 2:
user_list = param[1].split(b',')
if user_list:
for user in user_list:
items = user.split(b':')
if len(items) == 2:
user_int_id = int(items[0])
uid = struct.pack('<I', user_int_id)
if acl is not None and user_int_id not in acl:
self.del_user(uid)
else:
passwd = items[1]
self.add_user(uid, {'password':passwd})
def __init__(self, config, dns_resolver, is_local, stat_callback=None):
self._config = config
if is_local:
self._listen_addr = config['local_address']
self._listen_port = config['local_port']
self._remote_addr = config['server']
self._remote_port = config['server_port']
else:
self._listen_addr = config['server']
self._listen_port = config['server_port']
self._remote_addr = None
self._remote_port = None
self._dns_resolver = dns_resolver
self._password = common.to_bytes(config['password'])
self._method = config['method']
self._timeout = config['timeout']
if 'one_time_auth' in config and config['one_time_auth']:
self._ota_enable = True
else:
self._ota_enable = False
self._ota_enable_session = self._ota_enable
self._is_local = is_local
self._cache = lru_cache.LRUCache(timeout=config['timeout'],
close_callback=self._close_client)
self._client_fd_to_server_addr = \
lru_cache.LRUCache(timeout=config['timeout'])
self._dns_cache = lru_cache.LRUCache(timeout=300)
self._eventloop = None
self._closed = False
self._sockets = set()
if 'forbidden_ip' in config:
self._forbidden_iplist = config['forbidden_ip']
else:
self._forbidden_iplist = None
addrs = socket.getaddrinfo(self._listen_addr, self._listen_port, 0,
socket.SOCK_DGRAM, socket.SOL_UDP)
if len(addrs) == 0:
raise Exception("UDP can't get addrinfo for %s:%d" %
(self._listen_addr, self._listen_port))
af, socktype, proto, canonname, sa = addrs[0]
server_socket = socket.socket(af, socktype, proto)
server_socket.bind((self._listen_addr, self._listen_port))
server_socket.setblocking(False)
self._server_socket = server_socket
self._stat_callback = stat_callback
def get_cipher(self, password, method, op, iv):
# iv 是随机值 os.urandom
password = common.to_bytes(password)
m = self._method_info
if m[0] > 0:
key, iv_ = EVP_BytesToKey(password, m[0], m[1])
else:
# key_length == 0 indicates we should use the key directly
key, iv = password, b''
self.key = key
# 长度不够也没问题
iv = iv[:m[1]]
if op == 1:
# ope 1 表示iv用于加密
# this iv is for cipher not decipher
# 什么鬼，直接赋值不就好
self.cipher_iv = iv[:m[1]]
return m[2](method, key, iv, op)
def get_cipher(self, password, method, op, iv):
password = common.to_bytes(password)
# m指向一种加密方式，是tuple。
# 举例：m=rc4-md5时候， m = (16, 16, create_cipher)
m = self._method_info
if m[METHOD_INFO_KEY_LEN] > 0:
key, _ = EVP_BytesToKey(password, m[METHOD_INFO_KEY_LEN],
m[METHOD_INFO_IV_LEN])
else:
# key_length == 0 indicates we should use the key directly
key, iv = password, b''
self.key = key
iv = iv[:m[METHOD_INFO_IV_LEN]]
if op == CIPHER_ENC_ENCRYPTION:
# 这是获取加密专用的iv，不能用于解密
# this iv is for cipher not decipher
self.cipher_iv = iv
return m[METHOD_INFO_CRYPTO](method, key, iv, op, self.crypto_path)