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

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