Coverage for /root/GitHubProjects/impacket/impacket/Dot11Crypto.py : 100%

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1# Impacket - Collection of Python classes for working with network protocols.
2#
3# SECUREAUTH LABS. Copyright (C) 2018 SecureAuth Corporation. All rights reserved.
4#
5# This software is provided under a slightly modified version
6# of the Apache Software License. See the accompanying LICENSE file
7# for more information.
8#
9# Description:
10# IEEE 802.11 Network packet codecs.
11#
12# Author:
13# Gustavo Moreira
14#
16class RC4():
17 def __init__(self, key):
18 bkey = bytearray(key)
19 j = 0
20 self.state = bytearray(range(256))
21 for i in range(256):
22 j = (j + self.state[i] + bkey[i % len(key)]) & 0xff
23 self.state[i],self.state[j] = self.state[j],self.state[i] # SSWAP(i,j)
25 def encrypt(self, data):
26 i = j = 0
27 out=bytearray()
28 for char in bytearray(data):
29 i = (i+1) & 0xff
30 j = (j+self.state[i]) & 0xff
31 self.state[i],self.state[j] = self.state[j],self.state[i] # SSWAP(i,j)
32 out.append(char ^ self.state[(self.state[i] + self.state[j]) & 0xff])
34 return bytes(out)
36 def decrypt(self, data):
37 # It's symmetric
38 return self.encrypt(data)