python3下PyCrypto报错

from Crypto.Cipher import ARC4 as rc4cipher

enc = rc4cipher.new(key)

在python2下执行是没有问题，切到pyhon3下报如下错误

File "/home/test/lib/yingzt_crypt.py", line 217, in rc4_crypt
enc = rc4cipher.new(key)
File "/home/test/lib/python3.6/site-packages/Crypto/Cipher/ARC4.py", line 132, in new
return ARC4Cipher(key, *args, **kwargs)
File "/home/test/lib/python3.6/site-packages/Crypto/Cipher/ARC4.py", line 60, in __init__
result = _raw_arc4_lib.ARC4_stream_init(c_uint8_ptr(key),
File "/home/test/lib/python3.6/ctypes/__init__.py", line 361, in __getattr__
func = self.__getitem__(name)
File "/home/test/lib/python3.6/ctypes/__init__.py", line 366, in __getitem__
func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /home/test/lib/python3.6/site-packages/Crypto/Util/../Cipher/_ARC4.cpython-36m-x86_64-linux-gnu.so: undefined symbol: ARC4_stream_init

 

发现一个python的一个小而快速的arc4（rc4）密码实现。

• 非常注重性能；整个源代码都是用C编写的
• 易于安装；没有依赖关系的单个文件

基准

下面是针对3个主要RC4实现的基准度量

arc4比实际的PyCrypto库快67%。 而且，比纯pythonrc4库快1889%。

arc4	0.332659006119
PyCrypto	0.544879198074
rc4	6.60579204559

整个基准代码都在./benchmark.py中

安装

从pypi安装：

pip install arc4

或者克隆repo并安装：

git clone https://github.com/manicmaniac/arc4.git
cd arc4
python setup.py install

 

用法

from arc4 importARC4

arc4=ARC4('key')
cipher=arc4.encrypt('some plain text to encrypt')

 

因为rc4是一个流密码，所以必须在每个操作的开始初始化rc4对象。

arc4=ARC4('key')
arc4.decrypt(cipher)