某些update操作后，关于shadowsocks服务报错问题。

安装了 Nginx+PHP7 后，发现 SS服务器不能用了，试图重新启动 ss,结果报错如下：

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-<a href="https://www.uu63.com/tag/linux/" title="查看更多关于 Linux 的文章" target="_blank">Linux</a>-gnu/libcrypto.so.1.1: undefined symbol: EVP_CIPHER_CTX_cleanup

这个问题是由于在 openssl1.1.0 版本中，废弃了 EVP_CIPHER_CTX_cleanup 函数，如官网中所说：

EVP_CIPHER_CTX was made opaque in OpenSSL 1.1.0. As a result, EVP_CIPHER_CTX_reset() appeared and EVP_CIPHER_CTX_cleanup() disappeared.

EVP_CIPHER_CTX_init() remains as an alias for EVP_CIPHER_CTX_reset().

修改方法：

1,用 vim 打开文件：

vim /usr/local/lib/python2.7/dist-packages/shadowsocks/crypto/openssl.py

(该路径请根据自己的系统情况自行修改，如果不知道该文件在哪里的话，可以使用 find 命令查找文件位置)
2,跳转到 52 行（shadowsocks2.8.2 版本，其他版本搜索一下 cleanup）
3, 进入编辑模式
4,将第 52 行 libcrypto.EVP_CIPHER_CTX_cleanup.argtypes = (c_void_p,)
改为 libcrypto.EVP_CIPHER_CTX_reset.argtypes = (c_void_p,)
5,再次搜索 cleanup（全文件共 2 处，此处位于 111 行），将 libcrypto.EVP_CIPHER_CTX_cleanup(self._ctx) 改为 libcrypto.EVP_CIPHER_CTX_reset(self._ctx)
6,保存并退出
7, 启动 shadowsocks 服务：