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#!/usr/bin/python
"""
Inguma Penetration Testing Toolkit
Copyright (c) 2006, 2007 Joxean Koret, joxeankoret [at] yahoo.es
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2
of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
"""
"""
NOTE: Subject to be removed.
"""
import os
import re
import sys
from core import regexp2pyre
class CSnortRule:
msg = ""
flow = ""
contents = []
classtype = ""
sid = ""
rev = ""
pcre = ""
reference = ""
def getProperties(self):
return ("msg", "flow", "content", "classtype", "sid", "rev", "pcre", "reference")
def setProperty(self, param, value):
if value.startswith('"') and value.endswith('"'):
# Strip the starting and ending quotes
value = value[1:len(value)-1]
if param.lower() == "msg":
self.msg = value
elif param.lower() == "flow":
self.flow = value
elif param.lower() == "content":
self.contents.append(value)
elif param.lower() == "classtype":
self.classtype = value
elif param.lower() == "sid":
self.sid = value
elif param.lower() == "rev":
self.rev = value
elif param.lower() == "pcre":
self.pcre = regexp2pyre(value)
elif param.lower() == "reference":
self.reference = value
else:
print "Unknow option", param
class CSnortRuleParser:
path = ""
rules = []
def __init__(self, rulepath = "/etc/snort/rules/"):
self.path = rulepath
def processLine(self, line):
"""
Example rule:
alert tcp $EXTERNAL_NET any -> $SQL_SERVERS $ORACLE_PORTS (msg:"ORACLE misparsed login response"; flow:from_server,established;
content:"description=|28|"; nocase; content:!"connect_data=|28|sid="; nocase; content:!"address=|28|protocol=tcp"; nocase;
classtype:suspicious-login; sid:1675; rev:4;)
"""
data = line
pos = data.find("(")
if pos == -1:
return False
data = data[pos+1:len(data)-1]
objRule = CSnortRule()
for element in data.split(";"):
properties = element.split(":")
if len(properties) == 2:
if properties[0].lstrip() in objRule.getProperties():
objRule.setProperty(properties[0].lstrip(), properties[1])
self.rules.append(objRule)
def parse(self, mfile):
f = file(self.path + os.sep + mfile, "r")
for line in f:
if not line.startswith("#") and len(line.replace(" ", "")) > 0:
self.processLine(line)
def main():
snortRuleParser = CSnortRuleParser()
#
# This is the most important one
#
#snortRuleParser.parse("oracle.rules")
import os
for x in os.listdir("/etc/snort/rules"):
if x.endswith(".rules"):
snortRuleParser.parse(x)
for rule in snortRuleParser.rules:
if rule.pcre != "":
try:
print rule.msg, repr(rule.pcre)
p = re.compile(rule.pcre, re.IGNORECASE)
except:
print "Rule does not compile:", sys.exc_info()[1]
if __name__ == "__main__":
main()
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