在将openssl升级到1.1.0以上版本后，Shadowsocks 2.8.2 启动时会报undefined symbol: EVP_CIPHER_CTX_cleanup错误，如下：
INFO: loading config from ss.json
2016-12-14 22:47:50 INFO loading libcrypto from libcrypto.so.1.1
Traceback (most recent call last):
File “/usr/local/bin/sslocal”, line 11, in
sys.exit(main())
File “/usr/local/lib/python2.7/dist-packages/shadowsocks/local.py”, line 39, in main
config = shell.get_config(True)
File “/usr/local/lib/python2.7/dist-packages/shadowsocks/shell.py”, line 262, in get_config
check_config(config, is_local)
File “/usr/local/lib/python2.7/dist-packages/shadowsocks/shell.py”, line 124, in check_config
encrypt.try_cipher(config[‘password’], config[‘method’])
File “/usr/local/lib/python2.7/dist-packages/shadowsocks/encrypt.py”, line 44, in try_cipher
Encryptor(key, method)
File “/usr/local/lib/python2.7/dist-packages/shadowsocks/encrypt.py”, line 83, in init
random_string(self._method_info[1]))
File “/usr/local/lib/python2.7/dist-packages/shadowsocks/encrypt.py”, line 109, in get_cipher
return m[2](method, key, iv, op)
File “/usr/local/lib/python2.7/dist-packages/shadowsocks/crypto/openssl.py”, line 76, in init
load_openssl()
File “/usr/local/lib/python2.7/dist-packages/shadowsocks/crypto/openssl.py”, line 52, in load_openssl
libcrypto.EVP_CIPHER_CTX_cleanup.argtypes = (c_void_p,)
File “/usr/lib/python2.7/ctypes/init.py”, line 375, in getattr
func = self.getitem(name)
File “/usr/lib/python2.7/ctypes/init.py”, line 380, in getitem
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /usr/lib/x86_64-Linux-gnu/libcrypto.so.1.1: undefined symbol: EVP_CIPHER_CTX_cleanup解决方法：
- vi /usr/local/lib/python2.7/dist-packages/shadowsocks/crypto/openssl.py
将第52行 libcrypto.EVP_CIPHER_CTX_cleanup.argtypes = (c_void_p,)
改为 libcrypto.EVP_CIPHER_CTX_reset.argtypes = (c_void_p,)
并将第111行 libcrypto.EVP_CIPHER_CTX_cleanup(self._ctx)
改为 libcrypto.EVP_CIPHER_CTX_reset(self._ctx)
存盘退出 - 重新启动Shadowsocks。
参考：