remove M2Crypto completely

.travis.yml

@@ -9,10 +9,10 @@ cache:
     - dante-1.4.0
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq build-essential libssl-dev swig python-m2crypto python-numpy dnsutils iproute nginx bc
+  - sudo apt-get install -qq build-essential dnsutils iproute nginx bc
   - sudo dd if=/dev/urandom of=/usr/share/nginx/www/file bs=1M count=10
   - sudo service nginx restart
-  - pip install m2crypto salsa20 pep8 pyflakes nose coverage
+  - pip install pep8 pyflakes nose coverage
   - sudo tests/socksify/install.sh
   - sudo tests/libsodium/install.sh
   - sudo tests/setup_tc.sh

shadowsocks/crypto/rc4_md5.py

@@ -25,6 +25,7 @@
 
 import hashlib
 
+from shadowsocks.crypto import openssl
 
 __all__ = ['ciphers']
 
@@ -35,15 +36,7 @@ def create_cipher(alg, key, iv, op, key_as_bytes=0, d=None, salt=None,
     md5.update(key)
     md5.update(iv)
     rc4_key = md5.digest()
-
-    try:
-        from shadowsocks.crypto import openssl
-        return openssl.OpenSSLCrypto(b'rc4', rc4_key, b'', op)
-    except Exception:
-        import M2Crypto.EVP
-        return M2Crypto.EVP.Cipher(b'rc4', rc4_key, b'', op,
-                                   key_as_bytes=0, d='md5', salt=None, i=1,
-                                   padding=1)
+    return openssl.OpenSSLCrypto(b'rc4', rc4_key, b'', op)
 
 
 ciphers = {

shadowsocks/encrypt.py

@@ -28,24 +28,18 @@
 import hashlib
 import logging
 
-from shadowsocks.crypto import m2, rc4_md5, openssl, sodium, table
+from shadowsocks.crypto import rc4_md5, openssl, sodium, table
 
 
 method_supported = {}
 method_supported.update(rc4_md5.ciphers)
 method_supported.update(openssl.ciphers)
 method_supported.update(sodium.ciphers)
-# let M2Crypto override openssl
-method_supported.update(m2.ciphers)
 method_supported.update(table.ciphers)
 
 
 def random_string(length):
-    try:
-        import M2Crypto.Rand
-        return M2Crypto.Rand.rand_bytes(length)
-    except ImportError:
-        return os.urandom(length)
+    return os.urandom(length)
 
 
 cached_keys = {}