python 3 support; not stable yet

shadowsocks/__init__.py

@@ -1 +1,24 @@
 #!/usr/bin/python
+
+# Copyright (c) 2014 clowwindy
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import, division, print_function, \
+    with_statement

shadowsocks/asyncdns.py

@@ -21,6 +21,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import time
 import os
 import socket
@@ -33,7 +36,7 @@ from shadowsocks import common, lru_cache, eventloop
 
 CACHE_SWEEP_INTERVAL = 30
 
-VALID_HOSTNAME = re.compile(r"(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
+VALID_HOSTNAME = re.compile(br"(?!-)[A-Z\d-]{1,63}(?<!-)$", re.IGNORECASE)
 
 common.patch_socket()
 
@@ -77,17 +80,17 @@ QCLASS_IN = 1
 
 
 def build_address(address):
-    address = address.strip('.')
-    labels = address.split('.')
+    address = address.strip(b'.')
+    labels = address.split(b'.')
     results = []
     for label in labels:
         l = len(label)
         if l > 63:
             return None
-        results.append(chr(l))
+        results.append(common.chr(l))
         results.append(label)
-    results.append('\0')
-    return ''.join(results)
+    results.append(b'\0')
+    return b''.join(results)
 
 
 def build_request(address, qtype, request_id):
@@ -111,7 +114,7 @@ def parse_ip(addrtype, data, length, offset):
 def parse_name(data, offset):
     p = offset
     labels = []
-    l = ord(data[p])
+    l = common.ord(data[p])
     while l > 0:
         if (l & (128 + 64)) == (128 + 64):
             # pointer
@@ -121,12 +124,12 @@ def parse_name(data, offset):
             labels.append(r[1])
             p += 2
             # pointer is the end
-            return p - offset, '.'.join(labels)
+            return p - offset, b'.'.join(labels)
         else:
             labels.append(data[p + 1:p + 1 + l])
             p += 1 + l
-        l = ord(data[p])
-    return p - offset + 1, '.'.join(labels)
+        l = common.ord(data[p])
+    return p - offset + 1, b'.'.join(labels)
 
 
 # rfc1035
@@ -198,20 +201,20 @@ def parse_response(data):
             qds = []
             ans = []
             offset = 12
-            for i in xrange(0, res_qdcount):
+            for i in range(0, res_qdcount):
                 l, r = parse_record(data, offset, True)
                 offset += l
                 if r:
                     qds.append(r)
-            for i in xrange(0, res_ancount):
+            for i in range(0, res_ancount):
                 l, r = parse_record(data, offset)
                 offset += l
                 if r:
                     ans.append(r)
-            for i in xrange(0, res_nscount):
+            for i in range(0, res_nscount):
                 l, r = parse_record(data, offset)
                 offset += l
-            for i in xrange(0, res_arcount):
+            for i in range(0, res_arcount):
                 l, r = parse_record(data, offset)
                 offset += l
             response = DNSResponse()
@@ -232,6 +235,8 @@ def parse_response(data):
 def is_ip(address):
     for family in (socket.AF_INET, socket.AF_INET6):
         try:
+            if type(address) != str:
+                address = address.decode('utf8')
             socket.inet_pton(family, address)
             return family
         except (TypeError, ValueError, OSError, IOError):
@@ -242,9 +247,9 @@ def is_ip(address):
 def is_valid_hostname(hostname):
     if len(hostname) > 255:
         return False
-    if hostname[-1] == ".":
+    if hostname[-1] == b'.':
         hostname = hostname[:-1]
-    return all(VALID_HOSTNAME.match(x) for x in hostname.split("."))
+    return all(VALID_HOSTNAME.match(x) for x in hostname.split(b'.'))
 
 
 class DNSResponse(object):
@@ -287,11 +292,13 @@ class DNSResolver(object):
                 for line in content:
                     line = line.strip()
                     if line:
-                        if line.startswith('nameserver'):
+                        if line.startswith(b'nameserver'):
                             parts = line.split()
                             if len(parts) >= 2:
                                 server = parts[1]
                                 if is_ip(server) == socket.AF_INET:
+                                    if type(server) != str:
+                                        server = server.decode('utf8')
                                     self._servers.append(server)
         except IOError:
             pass
@@ -310,7 +317,7 @@ class DNSResolver(object):
                     if len(parts) >= 2:
                         ip = parts[0]
                         if is_ip(ip):
-                            for i in xrange(1, len(parts)):
+                            for i in range(1, len(parts)):
                                 hostname = parts[i]
                                 if hostname:
                                     self._hosts[hostname] = ip

shadowsocks/common.py

@@ -21,16 +21,37 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import socket
 import struct
 import logging
 
 
+def compat_ord(s):
+    if type(s) == int:
+        return s
+    return _ord(s)
+
+
+def compat_chr(d):
+    if bytes == str:
+        return _chr(d)
+    return bytes([d])
+
+
+_ord = ord
+_chr = chr
+ord = compat_ord
+chr = compat_chr
+
+
 def inet_ntop(family, ipstr):
     if family == socket.AF_INET:
         return socket.inet_ntoa(ipstr)
     elif family == socket.AF_INET6:
-        v6addr = ':'.join(('%02X%02X' % (ord(i), ord(j)))
+        v6addr = b':'.join((b'%02X%02X' % (ord(i), ord(j)))
                           for i, j in zip(ipstr[::2], ipstr[1::2]))
         return v6addr
 
@@ -39,15 +60,15 @@ def inet_pton(family, addr):
     if family == socket.AF_INET:
         return socket.inet_aton(addr)
     elif family == socket.AF_INET6:
-        if '.' in addr:  # a v4 addr
-            v4addr = addr[addr.rindex(':') + 1:]
+        if b'.' in addr:  # a v4 addr
+            v4addr = addr[addr.rindex(b':') + 1:]
             v4addr = socket.inet_aton(v4addr)
-            v4addr = map(lambda x: ('%02X' % ord(x)), v4addr)
-            v4addr.insert(2, ':')
-            newaddr = addr[:addr.rindex(':') + 1] + ''.join(v4addr)
+            v4addr = map(lambda x: (b'%02X' % ord(x)), v4addr)
+            v4addr.insert(2, b':')
+            newaddr = addr[:addr.rindex(b':') + 1] + b''.join(v4addr)
             return inet_pton(family, newaddr)
         dbyts = [0] * 8  # 8 groups
-        grps = addr.split(':')
+        grps = addr.split(b':')
         for i, v in enumerate(grps):
             if v:
                 dbyts[i] = int(v, 16)
@@ -58,7 +79,7 @@ def inet_pton(family, addr):
                     else:
                         break
                 break
-        return ''.join((chr(i // 256) + chr(i % 256)) for i in dbyts)
+        return b''.join((chr(i // 256) + chr(i % 256)) for i in dbyts)
     else:
         raise RuntimeError("What family?")
 

shadowsocks/crypto/__init__.py

@@ -19,3 +19,6 @@
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
+
+from __future__ import absolute_import, division, print_function, \
+    with_statement

shadowsocks/crypto/ctypes_openssl.py

@@ -20,6 +20,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import logging
 from ctypes import CDLL, c_char_p, c_int, c_long, byref,\
     create_string_buffer, c_void_p
@@ -117,31 +120,31 @@ class CtypesCrypto(object):
 
 
 ciphers = {
-    'aes-128-cfb': (16, 16, CtypesCrypto),
-    'aes-192-cfb': (24, 16, CtypesCrypto),
-    'aes-256-cfb': (32, 16, CtypesCrypto),
-    'aes-128-ofb': (16, 16, CtypesCrypto),
-    'aes-192-ofb': (24, 16, CtypesCrypto),
-    'aes-256-ofb': (32, 16, CtypesCrypto),
-    'aes-128-ctr': (16, 16, CtypesCrypto),
-    'aes-192-ctr': (24, 16, CtypesCrypto),
-    'aes-256-ctr': (32, 16, CtypesCrypto),
-    'aes-128-cfb8': (16, 16, CtypesCrypto),
-    'aes-192-cfb8': (24, 16, CtypesCrypto),
-    'aes-256-cfb8': (32, 16, CtypesCrypto),
-    'aes-128-cfb1': (16, 16, CtypesCrypto),
-    'aes-192-cfb1': (24, 16, CtypesCrypto),
-    'aes-256-cfb1': (32, 16, CtypesCrypto),
-    'bf-cfb': (16, 8, CtypesCrypto),
-    'camellia-128-cfb': (16, 16, CtypesCrypto),
-    'camellia-192-cfb': (24, 16, CtypesCrypto),
-    'camellia-256-cfb': (32, 16, CtypesCrypto),
-    'cast5-cfb': (16, 8, CtypesCrypto),
-    'des-cfb': (8, 8, CtypesCrypto),
-    'idea-cfb': (16, 8, CtypesCrypto),
-    'rc2-cfb': (16, 8, CtypesCrypto),
-    'rc4': (16, 0, CtypesCrypto),
-    'seed-cfb': (16, 16, CtypesCrypto),
+    b'aes-128-cfb': (16, 16, CtypesCrypto),
+    b'aes-192-cfb': (24, 16, CtypesCrypto),
+    b'aes-256-cfb': (32, 16, CtypesCrypto),
+    b'aes-128-ofb': (16, 16, CtypesCrypto),
+    b'aes-192-ofb': (24, 16, CtypesCrypto),
+    b'aes-256-ofb': (32, 16, CtypesCrypto),
+    b'aes-128-ctr': (16, 16, CtypesCrypto),
+    b'aes-192-ctr': (24, 16, CtypesCrypto),
+    b'aes-256-ctr': (32, 16, CtypesCrypto),
+    b'aes-128-cfb8': (16, 16, CtypesCrypto),
+    b'aes-192-cfb8': (24, 16, CtypesCrypto),
+    b'aes-256-cfb8': (32, 16, CtypesCrypto),
+    b'aes-128-cfb1': (16, 16, CtypesCrypto),
+    b'aes-192-cfb1': (24, 16, CtypesCrypto),
+    b'aes-256-cfb1': (32, 16, CtypesCrypto),
+    b'bf-cfb': (16, 8, CtypesCrypto),
+    b'camellia-128-cfb': (16, 16, CtypesCrypto),
+    b'camellia-192-cfb': (24, 16, CtypesCrypto),
+    b'camellia-256-cfb': (32, 16, CtypesCrypto),
+    b'cast5-cfb': (16, 8, CtypesCrypto),
+    b'des-cfb': (8, 8, CtypesCrypto),
+    b'idea-cfb': (16, 8, CtypesCrypto),
+    b'rc2-cfb': (16, 8, CtypesCrypto),
+    b'rc4': (16, 0, CtypesCrypto),
+    b'seed-cfb': (16, 16, CtypesCrypto),
 }
 
 
@@ -167,7 +170,7 @@ def test():
     # decipher = Salsa20Cipher('salsa20-ctr', 'k' * 32, 'i' * 8, 1)
     results = []
     pos = 0
-    print 'salsa20 test start'
+    print('salsa20 test start')
     start = time.time()
     while pos < len(plain):
         l = random.randint(100, 32768)
@@ -182,7 +185,7 @@ def test():
         results.append(decipher.update(c[pos:pos + l]))
         pos += l
     end = time.time()
-    print 'speed: %d bytes/s' % (BLOCK_SIZE * rounds / (end - start))
+    print('speed: %d bytes/s' % (BLOCK_SIZE * rounds / (end - start)))
     assert ''.join(results) == plain
 
 

shadowsocks/crypto/m2.py

@@ -20,6 +20,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import sys
 import logging
 
@@ -49,19 +52,19 @@ def err(alg, key, iv, op, key_as_bytes=0, d=None, salt=None, i=1, padding=1):
 
 if has_m2:
     ciphers = {
-        'aes-128-cfb': (16, 16, create_cipher),
-        'aes-192-cfb': (24, 16, create_cipher),
-        'aes-256-cfb': (32, 16, create_cipher),
-        'bf-cfb': (16, 8, create_cipher),
-        'camellia-128-cfb': (16, 16, create_cipher),
-        'camellia-192-cfb': (24, 16, create_cipher),
-        'camellia-256-cfb': (32, 16, create_cipher),
-        'cast5-cfb': (16, 8, create_cipher),
-        'des-cfb': (8, 8, create_cipher),
-        'idea-cfb': (16, 8, create_cipher),
-        'rc2-cfb': (16, 8, create_cipher),
-        'rc4': (16, 0, create_cipher),
-        'seed-cfb': (16, 16, create_cipher),
+        b'aes-128-cfb': (16, 16, create_cipher),
+        b'aes-192-cfb': (24, 16, create_cipher),
+        b'aes-256-cfb': (32, 16, create_cipher),
+        b'bf-cfb': (16, 8, create_cipher),
+        b'camellia-128-cfb': (16, 16, create_cipher),
+        b'camellia-192-cfb': (24, 16, create_cipher),
+        b'camellia-256-cfb': (32, 16, create_cipher),
+        b'cast5-cfb': (16, 8, create_cipher),
+        b'des-cfb': (8, 8, create_cipher),
+        b'idea-cfb': (16, 8, create_cipher),
+        b'rc2-cfb': (16, 8, create_cipher),
+        b'rc4': (16, 0, create_cipher),
+        b'seed-cfb': (16, 16, create_cipher),
     }
 else:
     ciphers = {}

shadowsocks/crypto/rc4_md5.py

@@ -20,6 +20,8 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
 
 import hashlib
 
@@ -50,5 +52,5 @@ def create_cipher(alg, key, iv, op, key_as_bytes=0, d=None, salt=None,
 
 
 ciphers = {
-    'rc4-md5': (16, 16, create_cipher),
+    b'rc4-md5': (16, 16, create_cipher),
 }

shadowsocks/crypto/salsa20_ctr.py

@@ -20,6 +20,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import time
 import struct
 import logging
@@ -39,13 +42,13 @@ def run_imports():
     if not imported:
         imported = True
         try:
-            __import__('numpy')
+            numpy = __import__('numpy')
         except ImportError:
             logging.error('can not import numpy, using SLOW XOR')
             logging.error('please install numpy if you use salsa20')
             slow_xor = True
         try:
-            __import__('salsa20')
+            salsa20 = __import__('salsa20')
         except ImportError:
             logging.error('you have to install salsa20 before you use salsa20')
             sys.exit(1)
@@ -116,7 +119,7 @@ class Salsa20Cipher(object):
 
 
 ciphers = {
-    'salsa20-ctr': (32, 8, Salsa20Cipher),
+    b'salsa20-ctr': (32, 8, Salsa20Cipher),
 }
 
 
@@ -138,7 +141,7 @@ def test():
     decipher = Salsa20Cipher('salsa20-ctr', 'k' * 32, 'i' * 8, 1)
     results = []
     pos = 0
-    print 'salsa20 test start'
+    print('salsa20 test start')
     start = time.time()
     while pos < len(plain):
         l = random.randint(100, 32768)
@@ -153,7 +156,7 @@ def test():
         results.append(decipher.update(c[pos:pos + l]))
         pos += l
     end = time.time()
-    print 'speed: %d bytes/s' % (BLOCK_SIZE * rounds / (end - start))
+    print('speed: %d bytes/s' % (BLOCK_SIZE * rounds / (end - start)))
     assert ''.join(results) == plain
 
 

shadowsocks/encrypt.py

@@ -20,6 +20,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import os
 import sys
 import hashlib
@@ -74,23 +77,20 @@ def init_table(key, method=None):
                                          string.maketrans('', ''))
         cached_tables[key] = [encrypt_table, decrypt_table]
     else:
-        try:
-            Encryptor(key, method)  # test if the settings if OK
-        except Exception as e:
-            logging.error(e)
-            sys.exit(1)
+        Encryptor(key, method)  # test if the settings if OK
 
 
 def EVP_BytesToKey(password, key_len, iv_len):
     # equivalent to OpenSSL's EVP_BytesToKey() with count 1
     # so that we make the same key and iv as nodejs version
-    password = str(password)
+    if hasattr(password, 'encode'):
+        password = password.encode('utf-8')
     r = cached_keys.get(password, None)
     if r:
         return r
     m = []
     i = 0
-    while len(''.join(m)) < (key_len + iv_len):
+    while len(b''.join(m)) < (key_len + iv_len):
         md5 = hashlib.md5()
         data = password
         if i > 0:
@@ -98,7 +98,7 @@ def EVP_BytesToKey(password, key_len, iv_len):
         md5.update(data)
         m.append(md5.digest())
         i += 1
-    ms = ''.join(m)
+    ms = b''.join(m)
     key = ms[:key_len]
     iv = ms[key_len:key_len + iv_len]
     cached_keys[password] = (key, iv)
@@ -107,13 +107,13 @@ def EVP_BytesToKey(password, key_len, iv_len):
 
 class Encryptor(object):
     def __init__(self, key, method=None):
-        if method == 'table':
+        if method == b'table':
             method = None
         self.key = key
         self.method = method
         self.iv = None
         self.iv_sent = False
-        self.cipher_iv = ''
+        self.cipher_iv = b''
         self.decipher = None
         if method:
             self.cipher = self.get_cipher(key, method, 1, iv=random_string(32))
@@ -130,7 +130,8 @@ class Encryptor(object):
         return len(self.cipher_iv)
 
     def get_cipher(self, password, method, op, iv=None):
-        password = password.encode('utf-8')
+        if hasattr(password, 'encode'):
+            password = password.encode('utf-8')
         method = method.lower()
         m = self.get_cipher_param(method)
         if m:
@@ -176,7 +177,7 @@ class Encryptor(object):
 
 
 def encrypt_all(password, method, op, data):
-    if method is not None and method.lower() == 'table':
+    if method is not None and method.lower() == b'table':
         method = None
     if not method:
         [encrypt_table, decrypt_table] = init_table(password)

shadowsocks/eventloop.py

@@ -24,6 +24,8 @@
 # from ssloop
 # https://github.com/clowwindy/ssloop
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
 
 import os
 import socket
@@ -100,7 +102,7 @@ class KqueueLoop(object):
                 results[fd] |= POLL_IN
             elif e.filter == select.KQ_FILTER_WRITE:
                 results[fd] |= POLL_OUT
-        return results.iteritems()
+        return results.items()
 
     def add_fd(self, fd, mode):
         self._fds[fd] = mode

shadowsocks/local.py

@@ -21,11 +21,15 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import sys
 import os
 import logging
 import signal
 
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '../'))
 from shadowsocks import utils, encrypt, eventloop, tcprelay, udprelay, asyncdns
 
 

shadowsocks/lru_cache.py

@@ -1,6 +1,9 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import collections
 import logging
 import time

shadowsocks/server.py

@@ -21,11 +21,15 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import sys
 import os
 import logging
 import signal
 
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), '../'))
 from shadowsocks import utils, encrypt, eventloop, tcprelay, udprelay, asyncdns
 
 
@@ -66,13 +70,13 @@ def main():
     def run_server():
         def child_handler(signum, _):
             logging.warn('received SIGQUIT, doing graceful shutting down..')
-            map(lambda s: s.close(next_tick=True), tcp_servers + udp_servers)
+            list(map(lambda s: s.close(next_tick=True), tcp_servers + udp_servers))
         signal.signal(getattr(signal, 'SIGQUIT', signal.SIGTERM),
                       child_handler)
         try:
             loop = eventloop.EventLoop()
             dns_resolver.add_to_loop(loop)
-            map(lambda s: s.add_to_loop(loop), tcp_servers + udp_servers)
+            list(map(lambda s: s.add_to_loop(loop), tcp_servers + udp_servers))
             loop.run()
         except (KeyboardInterrupt, IOError, OSError) as e:
             logging.error(e)
@@ -85,7 +89,7 @@ def main():
         if os.name == 'posix':
             children = []
             is_child = False
-            for i in xrange(0, int(config['workers'])):
+            for i in range(0, int(config['workers'])):
                 r = os.fork()
                 if r == 0:
                     logging.info('worker started')

shadowsocks/tcprelay.py

@@ -21,6 +21,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import time
 import socket
 import errno
@@ -29,7 +32,7 @@ import logging
 import traceback
 import random
 
-from shadowsocks import encrypt, eventloop, utils
+from shadowsocks import encrypt, eventloop, utils, common
 from shadowsocks.common import parse_header
 
 
@@ -231,13 +234,13 @@ class TCPRelayHandler(object):
     def _handle_stage_hello(self, data):
         try:
             if self._is_local:
-                cmd = ord(data[1])
+                cmd = common.ord(data[1])
                 if cmd == CMD_UDP_ASSOCIATE:
                     logging.debug('UDP associate')
                     if self._local_sock.family == socket.AF_INET6:
-                        header = '\x05\x00\x00\x04'
+                        header = b'\x05\x00\x00\x04'
                     else:
-                        header = '\x05\x00\x00\x01'
+                        header = b'\x05\x00\x00\x01'
                     addr, port = self._local_sock.getsockname()
                     addr_to_send = socket.inet_pton(self._local_sock.family,
                                                     addr)
@@ -265,7 +268,7 @@ class TCPRelayHandler(object):
             self._stage = STAGE_DNS
             if self._is_local:
                 # forward address to remote
-                self._write_to_sock('\x05\x00\x00\x01\x00\x00\x00\x00\x10\x10',
+                self._write_to_sock(b'\x05\x00\x00\x01\x00\x00\x00\x00\x10\x10',
                                     self._local_sock)
                 data_to_send = self._encryptor.encrypt(data)
                 self._data_to_write_to_remote.append(data_to_send)
@@ -366,7 +369,7 @@ class TCPRelayHandler(object):
             return
         elif is_local and self._stage == STAGE_INIT:
             # TODO check auth method
-            self._write_to_sock('\x05\00', self._local_sock)
+            self._write_to_sock(b'\x05\00', self._local_sock)
             self._stage = STAGE_HELLO
             return
         elif self._stage == STAGE_REPLY:
@@ -411,7 +414,7 @@ class TCPRelayHandler(object):
     def _on_remote_write(self):
         self._stage = STAGE_STREAM
         if self._data_to_write_to_remote:
-            data = ''.join(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:

shadowsocks/udprelay.py

@@ -65,6 +65,8 @@
 # `client`  means UDP clients that connects to other servers
 # `server`  means the UDP server that handles user requests
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
 
 import time
 import socket
@@ -73,7 +75,7 @@ import struct
 import errno
 import random
 
-from shadowsocks import encrypt, eventloop, lru_cache
+from shadowsocks import encrypt, eventloop, lru_cache, common
 from shadowsocks.common import parse_header, pack_addr
 
 
@@ -146,7 +148,7 @@ class UDPRelay(object):
         if not data:
             logging.debug('UDP handle_server: data is empty')
         if self._is_local:
-            frag = ord(data[2])
+            frag = common.ord(data[2])
             if frag != 0:
                 logging.warn('drop a message since frag is not 0')
                 return

shadowsocks/utils.py

@@ -21,6 +21,9 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import os
 import json
 import sys
@@ -33,9 +36,9 @@ VERBOSE_LEVEL = 5
 
 def check_python():
     info = sys.version_info
-    if not (info[0] == 2 and info[1] >= 6):
-        print 'Python 2.6 or 2.7 required'
-        sys.exit(1)
+    # if not (info[0] == 2 and info[1] >= 6):
+    #     print('Python 2.6 or 2.7 required')
+    #     sys.exit(1)
 
 
 def print_shadowsocks():
@@ -45,7 +48,7 @@ def print_shadowsocks():
         version = pkg_resources.get_distribution('shadowsocks').version
     except Exception:
         pass
-    print 'shadowsocks %s' % version
+    print('shadowsocks %s' % version)
 
 
 def find_config():
@@ -76,7 +79,7 @@ def check_config(config):
     if config.get('timeout', 300) > 600:
         logging.warn('warning: your timeout %d seems too long' %
                      int(config.get('timeout')))
-    if config.get('password') in ['mypassword', 'barfoo!']:
+    if config.get('password') in ['mypassword']:
         logging.error('DON\'T USE DEFAULT PASSWORD! Please change it in your '
                       'config.json!')
         exit(1)
@@ -102,7 +105,8 @@ def get_config(is_local):
             logging.info('loading config from %s' % config_path)
             with open(config_path, 'rb') as f:
                 try:
-                    config = json.load(f, object_hook=_decode_dict)
+                    config = json.loads(f.read().decode('utf8'),
+                                        object_hook=_decode_dict)
                 except ValueError as e:
                     logging.error('found an error in config.json: %s',
                                   e.message)
@@ -145,7 +149,7 @@ def get_config(is_local):
                 v_count -= 1
                 config['verbose'] = v_count
     except getopt.GetoptError as e:
-        print >>sys.stderr, e
+        print(e, file=sys.stderr)
         print_help(is_local)
         sys.exit(2)
 
@@ -218,7 +222,7 @@ def print_help(is_local):
 
 
 def print_local_help():
-    print '''usage: sslocal [-h] -s SERVER_ADDR [-p SERVER_PORT]
+    print('''usage: sslocal [-h] -s SERVER_ADDR [-p SERVER_PORT]
                [-b LOCAL_ADDR] [-l LOCAL_PORT] -k PASSWORD [-m METHOD]
                [-t TIMEOUT] [-c CONFIG] [--fast-open] [-v] [-q]
 
@@ -237,11 +241,11 @@ optional arguments:
   -q, -qq               quiet mode, only show warnings/errors
 
 Online help: <https://github.com/clowwindy/shadowsocks>
-'''
+''')
 
 
 def print_server_help():
-    print '''usage: ssserver [-h] [-s SERVER_ADDR] [-p SERVER_PORT] -k PASSWORD
+    print('''usage: ssserver [-h] [-s SERVER_ADDR] [-p SERVER_PORT] -k PASSWORD
                 -m METHOD [-t TIMEOUT] [-c CONFIG] [--fast-open]
                 [--workers WORKERS] [-v] [-q]
 
@@ -259,13 +263,13 @@ optional arguments:
   -q, -qq               quiet mode, only show warnings/errors
 
 Online help: <https://github.com/clowwindy/shadowsocks>
-'''
+''')
 
 
 def _decode_list(data):
     rv = []
     for item in data:
-        if isinstance(item, unicode):
+        if hasattr(item, 'encode'):
             item = item.encode('utf-8')
         elif isinstance(item, list):
             item = _decode_list(item)
@@ -277,10 +281,8 @@ def _decode_list(data):
 
 def _decode_dict(data):
     rv = {}
-    for key, value in data.iteritems():
-        if isinstance(key, unicode):
-            key = key.encode('utf-8')
-        if isinstance(value, unicode):
+    for key, value in data.items():
+        if hasattr(value, 'encode'):
             value = value.encode('utf-8')
         elif isinstance(value, list):
             value = _decode_list(value)

tests/test.py

@@ -1,6 +1,9 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 
+from __future__ import absolute_import, division, print_function, \
+    with_statement
+
 import sys
 import os
 import signal
@@ -22,7 +25,7 @@ else:
 if 'salsa20' in sys.argv[-1]:
     from shadowsocks.crypto import salsa20_ctr
     salsa20_ctr.test()
-    print 'encryption test passed'
+    print('encryption test passed')
 
 p1 = Popen(['python', 'shadowsocks/server.py', '-c', server_config],
            stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
@@ -69,7 +72,7 @@ try:
             sys.exit(r)
     else:
         sys.exit(1)
-    print 'test passed'
+    print('test passed')
 
 finally:
     for p in [p1, p2]: