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367 lines
16 KiB
Python
367 lines
16 KiB
Python
#!/usr/bin/env python
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#------------------------------------------------------------------
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# November 2014, created within ASIG
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# Author James Spadaro (jaspadar)
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# Co-Author Lilith Wyatt (liwyatt)
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#------------------------------------------------------------------
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# Copyright (c) 2014-2017 by Cisco Systems, Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. Neither the name of the Cisco Systems, Inc. nor the
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# names of its contributors may be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS "AS IS" AND ANY
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# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#------------------------------------------------------------------
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# Type definitions for the fuzzer
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#
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# This script defines the various message and data types used in
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# the fuzzer, and utility functions used by them.
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#------------------------------------------------------------------
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class MessageSubComponent(object):
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def __init__(self, message, isFuzzed):
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self.message = message
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self.isFuzzed = isFuzzed
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# This includes both fuzzed messages and messages the user
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# has altered with messageprocessor callbacks
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self._altered = message
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def setAlteredByteArray(self, byteArray):
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self._altered = byteArray
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def getAlteredByteArray(self):
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return self._altered
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def getOriginalByteArray(self):
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return self.message
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# Contains all data of a given packet of the session
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class Message(object):
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class Direction:
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Outbound = "outbound"
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Inbound = "inbound"
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class Format:
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CommaSeparatedHex = 0 # 00,01,02,20,2a,30,31
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Ascii = 1 # asdf\x00\x01\x02
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Raw = 2 # a raw byte array from a pcap
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def __init__(self):
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self.direction = -1
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# Whether any subcomponent is fuzzed - might not be entire message
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# Default to False, set to True as message subcomponents are set below
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self.isFuzzed = False
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# This will be populated with message subcomponents
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# IE, specified as message 0 11,22,33
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# 44,55,66
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# Then 11,22,33 will be subcomponent 0, 44,55,66 will be subcomponent 1
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# If it's a traditional message, it will only have one element (entire message)
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self.subcomponents = []
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def getOriginalSubcomponents(self):
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return [subcomponent.message for subcomponent in self.subcomponents]
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# May or may not have actually been changed
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# Version of subcomponents that includes fuzzing and messageprocessor changes from user
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# Is transient and reverted to original every iteration
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def getAlteredSubcomponents(self):
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return [subcomponent.getAlteredByteArray() for subcomponent in self.subcomponents]
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def getOriginalMessage(self):
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return bytearray().join([subcomponent.message for subcomponent in self.subcomponents])
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# May or may not have actually been changed
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# Version of message that includes fuzzing and messageprocessor changes from user
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# Is transient and reverted to original every iteration
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def getAlteredMessage(self):
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return bytearray().join([subcomponent.getAlteredByteArray() for subcomponent in self.subcomponents])
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def resetAlteredMessage(self):
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for subcomponent in self.subcomponents:
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subcomponent.setAlteredByteArray(subcomponent.message)
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# Set the message on the Message
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# sourceType - Format.CommaSeparatedHex, Ascii, or Raw
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# message - Message in above format
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# isFuzzed - whether this message should have its subcomponent
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# flag isFuzzed set
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def setMessageFrom(self, sourceType, message, isFuzzed):
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if sourceType == self.Format.CommaSeparatedHex:
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message = bytearray([x.decode("hex") for x in message.split(",")])
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elif sourceType == self.Format.Ascii:
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message = self.deserializeByteArray(message)
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elif sourceType == self.Format.Raw:
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message = message
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else:
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raise RuntimeError("Invalid sourceType")
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self.subcomponents = [MessageSubComponent(message, isFuzzed)]
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if isFuzzed:
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self.isFuzzed = True
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# Same arguments as above, but adds to .message as well as
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# adding a new subcomponent
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# createNewSubcomponent - If false, don't create another subcomponent,
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# instead, append new message data to last subcomponent in message
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def appendMessageFrom(self, sourceType, message, isFuzzed, createNewSubcomponent=True):
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if sourceType == self.Format.CommaSeparatedHex:
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newMessage = bytearray([x.decode("hex") for x in message.split(",")])
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elif sourceType == self.Format.Ascii:
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newMessage = self.deserializeByteArray(message)
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elif sourceType == self.Format.Raw:
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newMessage = message
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else:
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raise RuntimeError("Invalid sourceType")
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if createNewSubcomponent:
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self.subcomponents.append(MessageSubComponent(newMessage, isFuzzed))
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else:
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self.subcomponents[-1].message += newMessage
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if isFuzzed:
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# Make sure message is set to fuzz as well
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self.isFuzzed = True
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def isOutbound(self):
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return self.direction == self.Direction.Outbound
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def __eq__(self, other):
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# bytearray (for message) implements __eq__()
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return self.direction == other.direction and self.message == other.message
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@classmethod
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def serializeByteArray(cls, byteArray):
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return repr(str(byteArray))
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@classmethod
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def deserializeByteArray(cls, string):
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# This appears to properly reverse repr() without the risks of eval
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return bytearray(string[1:-1].encode('utf8').decode('unicode-escape').encode('utf8'))
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def getAlteredSerialized(self):
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if len(self.subcomponents) < 1:
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return "{0} {1}\n".format(self.direction, "ERROR: No data in message.")
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else:
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serializedMessage = "{0}{1} {2}\n".format("fuzz " if self.subcomponents[0].isFuzzed else "", self.direction, self.serializeByteArray(self.subcomponents[0].getAlteredByteArray()))
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for subcomponent in self.subcomponents[1:]:
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serializedMessage += "sub {0}{1}\n".format("fuzz " if subcomponent.isFuzzed else "", self.serializeByteArray(subcomponent.getAlteredByteArray()))
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return serializedMessage
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def getSerialized(self):
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if len(self.subcomponents) < 1:
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return "{0} {1}\n".format(self.direction, "ERROR: No data in message.")
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else:
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serializedMessage = "{0} {1}{2}\n".format(self.direction, "fuzz " if self.subcomponents[0].isFuzzed else "", self.serializeByteArray(self.subcomponents[0].message))
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for subcomponent in self.subcomponents[1:]:
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serializedMessage += "sub {0}{1}\n".format("fuzz " if subcomponent.isFuzzed else "", self.serializeByteArray(subcomponent.message))
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return serializedMessage
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# Utility function for setFromSerialized and appendFromSerialized below
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def _extractMessageComponents(self, serializedData):
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firstQuoteSingle = serializedData.find('\'')
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lastQuoteSingle = serializedData.rfind('\'')
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firstQuoteDouble = serializedData.find('"')
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lastQuoteDouble = serializedData.rfind('"')
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firstQuote = -1
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lastQuote = -1
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if firstQuoteSingle == -1 or firstQuoteSingle == lastQuoteSingle:
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# If no valid single quotes, go double quote
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firstQuote = firstQuoteDouble
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lastQuote = lastQuoteDouble
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elif firstQuoteDouble == -1 or firstQuoteDouble == lastQuoteDouble:
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# If no valid double quotes, go single quote
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firstQuote = firstQuoteSingle
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lastQuote = lastQuoteSingle
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elif firstQuoteSingle < firstQuoteDouble:
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# If both are valid, go single if further out
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firstQuote = firstQuoteSingle
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lastQuote = lastQuoteSingle
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else:
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# Both are valid but double is further out
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firstQuote = firstQuoteDouble
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lastQuote = lastQuoteDouble
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if firstQuote == -1 or lastQuote == -1 or firstQuote == lastQuote:
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raise RuntimeError("Invalid message data, no message found")
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# Pull out everything, quotes and all, and deserialize it
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messageData = serializedData[firstQuote:lastQuote+1]
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# Process the args
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serializedData = serializedData[:firstQuote].split(" ")
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return (serializedData, messageData)
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# Handles _one line_ of data, either "inbound" or "outbound"
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# Lines following this should be passed to appendFromSerialized() below
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def setFromSerialized(self, serializedData):
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serializedData = serializedData.replace("\n", "")
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(serializedData, messageData) = self._extractMessageComponents(serializedData)
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if len(messageData) == 0 or len(serializedData) < 1:
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raise RuntimeError("Invalid message data")
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direction = serializedData[0]
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args = serializedData[1:-1]
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if direction != "inbound" and direction != "outbound":
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raise RuntimeError("Invalid message data, unknown direction {0}".format(direction))
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isFuzzed = False
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if "fuzz" in args:
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isFuzzed = True
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if len(serializedData) < 3:
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raise RuntimeError("Invalid message data")
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self.direction = direction
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self.setMessageFrom(self.Format.Ascii, messageData, isFuzzed)
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# Add another line, used for multiline messages
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def appendFromSerialized(self, serializedData, createNewSubcomponent=True):
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serializedData = serializedData.replace("\n", "")
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(serializedData, messageData) = self._extractMessageComponents(serializedData)
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if createNewSubcomponent:
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if len(messageData) == 0 or len(serializedData) < 1 or serializedData[0] != "sub":
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raise RuntimeError("Invalid message data")
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else:
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# If not creating a subcomponent, we won't have "sub", "fuzz", and the other fun stuff
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if len(messageData) == 0:
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raise RuntimeError("Invalid message data")
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args = serializedData[1:-1]
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# Put either "fuzz" or nothing before actual message
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# Can tell the difference even with ascii because ascii messages have '' quotes
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# IOW, even a message subcomponent 'fuzz' will have the 's around it, not be fuzz without quotes
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isFuzzed = False
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if "fuzz" in args:
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isFuzzed = True
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self.appendMessageFrom(self.Format.Ascii, messageData, isFuzzed, createNewSubcomponent=createNewSubcomponent)
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class MessageCollection(object):
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def __init__(self):
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self.messages = []
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def addMessage(self, message):
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self.messages.append(message)
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def doClientMessagesMatch(self, otherMessageCollection):
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for i in range(0, len(self.messages)):
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# Skip server messages
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if not self.messages[i].isOutbound():
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continue
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try:
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# Message implements __eq__()
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if self.messages[i] != otherMessageCollection.messages[i]:
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return False
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except IndexError:
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return False
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# All messages passed
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return True
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import os
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import os.path
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from copy import deepcopy
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# Handles all the logging of the fuzzing session
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# Log messages can be found at sample_apps/<app>/<app>_logs/<date>/
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class Logger(object):
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def __init__(self, folderPath):
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self._folderPath = folderPath
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if os.path.exists(folderPath):
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print("Data output directory already exists: %s" % (folderPath))
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exit()
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else:
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try:
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os.makedirs(folderPath)
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except:
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print("Unable to create logging directory: %s" % (folderPath))
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exit()
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self.resetForNewRun()
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# Store just the data, forget trying to make a Message object
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# With the subcomponents and everything, it just gets weird,
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# and we don't need it
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def setReceivedMessageData(self, messageNumber, data):
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self.receivedMessageData[messageNumber] = data
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def setHighestMessageNumber(self, messageNumber):
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# The highest message # this fuzz session made it to
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self._highestMessageNumber = messageNumber
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def outputLastLog(self, runNumber, messageCollection, errorMessage):
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return self._outputLog(runNumber, messageCollection, errorMessage, self._lastReceivedMessageData, self._lastHighestMessageNumber)
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def outputLog(self, runNumber, messageCollection, errorMessage):
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return self._outputLog(runNumber, messageCollection, errorMessage, self.receivedMessageData, self._highestMessageNumber)
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def _outputLog(self, runNumber, messageCollection, errorMessage, receivedMessageData, highestMessageNumber):
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with open(os.path.join(self._folderPath, str(runNumber)), "w") as outputFile:
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print("Logging run number %d" % (runNumber))
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outputFile.write("Log from run with seed %d\n" % (runNumber))
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outputFile.write("Error message: %s\n" % (errorMessage))
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if highestMessageNumber == -1 or runNumber == 0:
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outputFile.write("Failed to connect on this run.\n")
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outputFile.write("\n")
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i = 0
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for message in messageCollection.messages:
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outputFile.write("Packet %d: %s" % (i, message.getSerialized()))
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if message.isFuzzed:
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outputFile.write("Fuzzed Packet %d: %s\n" % (i, message.getAlteredSerialized()))
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if i in receivedMessageData:
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# Compare what was actually sent to what we expected, log if they differ
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if receivedMessageData[i] != message.getOriginalMessage():
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outputFile.write("Actual data received for packet %d: %s" % (i, Message.serializeByteArray(receivedMessageData[i])))
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else:
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outputFile.write("Received expected data\n")
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if highestMessageNumber == i:
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if message.isOutbound():
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outputFile.write("This is the last message sent\n")
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else:
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outputFile.write("This is the last message received\n")
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outputFile.write("\n")
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i += 1
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def resetForNewRun(self):
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try:
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self._lastReceivedMessageData = deepcopy(self.receivedMessageData)
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self._lastHighestMessageNumber = self._highestMessageNumber
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except AttributeError:
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self._lastReceivedMessageData = {}
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self._lastHighestMessageNumber = -1
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self.receivedMessageData = {}
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self.setHighestMessageNumber(-1)
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