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2b509a2 May 18, 2018
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# -*- coding: utf-8 -*-
import json, os, base64
import pymisp
misperrors = {'error': 'Error'}
moduleinfo = {'version': '0.1', 'author': 'Christian Studer',
'description': 'Import Attributes from a csv file.',
'module-type': ['import']}
moduleconfig = []
inputSource = ['file']
userConfig = {'header': {
'type': 'String',
'message': 'Define the header of the csv file, with types (included in MISP attribute types or attribute fields) separated by commas.\nFor fields that do not match these types, please use space or simply nothing between commas.\nFor instance: ip-src,domain, ,timestamp'},
'has_header':{
'type': 'Boolean',
'message': 'Tick this box ONLY if there is a header line, NOT COMMENTED, in the file (which will be skipped atm).'
}}
duplicatedFields = {'mispType': {'mispComment': 'comment'},
'attrField': {'attrComment': 'comment'}}
attributesFields = ['type', 'value', 'category', 'to_ids', 'comment', 'distribution']
delimiters = [',', ';', '|', '/', '\t', ' ']
class CsvParser():
def __init__(self, header, has_header):
self.header = header
self.fields_number = len(header)
self.has_header = has_header
self.attributes = []
def parse_data(self, data):
return_data = []
if self.fields_number == 1:
for line in data:
l = line.split('#')[0].strip()
if l:
return_data.append(l)
self.delimiter = None
else:
self.delimiter_count = dict([(d, 0) for d in delimiters])
for line in data:
l = line.split('#')[0].strip()
if l:
self.parse_delimiter(l)
return_data.append(l)
# find which delimiter is used
self.delimiter = self.find_delimiter()
self.data = return_data[1:] if self.has_header else return_data
def parse_delimiter(self, line):
for d in delimiters:
if line.count(d) >= (self.fields_number - 1):
self.delimiter_count[d] += 1
def find_delimiter(self):
_, delimiter = max((n, v) for v, n in self.delimiter_count.items())
return delimiter
def buildAttributes(self):
# if there is only 1 field of data
if self.delimiter is None:
mispType = self.header[0]
for data in self.data:
d = data.strip()
if d:
self.attributes.append({'types': mispType, 'values': d})
else:
# split fields that should be recognized as misp attribute types from the others
list2pop, misp, head = self.findMispTypes()
# for each line of data
for data in self.data:
datamisp = []
datasplit = data.split(self.delimiter)
# in case there is an empty line or an error
if len(datasplit) != self.fields_number:
continue
# pop from the line data that matches with a misp type, using the list of indexes
for l in list2pop:
datamisp.append(datasplit.pop(l).strip())
# for each misp type, we create an attribute
for m, dm in zip(misp, datamisp):
attribute = {'types': m, 'values': dm}
for h, ds in zip(head, datasplit):
if h:
attribute[h] = ds.strip()
self.attributes.append(attribute)
def findMispTypes(self):
descFilename = os.path.join(pymisp.__path__[0], 'data/describeTypes.json')
with open(descFilename, 'r') as f:
MispTypes = json.loads(f.read())['result'].get('types')
list2pop = []
misp = []
head = []
for h in reversed(self.header):
n = self.header.index(h)
# fields that are misp attribute types
if h in MispTypes:
list2pop.append(n)
misp.append(h)
# handle confusions between misp attribute types and attribute fields
elif h in duplicatedFields['mispType']:
# fields that should be considered as misp attribute types
list2pop.append(n)
misp.append(duplicatedFields['mispType'].get(h))
elif h in duplicatedFields['attrField']:
# fields that should be considered as attribute fields
head.append(duplicatedFields['attrField'].get(h))
# or, it could be an attribute field
elif h in attributesFields:
head.append(h)
# otherwise, it is not defined
else:
head.append('')
# return list of indexes of the misp types, list of the misp types, remaining fields that will be attribute fields
return list2pop, misp, list(reversed(head))
def handler(q=False):
if q is False:
return False
request = json.loads(q)
if request.get('data'):
data = base64.b64decode(request['data']).decode('utf-8')
else:
misperrors['error'] = "Unsupported attributes type"
return misperrors
if not request.get('config') and not request['config'].get('header'):
misperrors['error'] = "Configuration error"
return misperrors
header = request['config'].get('header').split(',')
header = [c.strip() for c in header]
has_header = request['config'].get('has_header')
has_header = True if has_header == '1' else False
csv_parser = CsvParser(header, has_header)
csv_parser.parse_data(data.split('\n'))
# build the attributes
csv_parser.buildAttributes()
r = {'results': csv_parser.attributes}
return r
def introspection():
modulesetup = {}
try:
userConfig
modulesetup['userConfig'] = userConfig
except NameError:
pass
try:
inputSource
modulesetup['inputSource'] = inputSource
except NameError:
pass
return modulesetup
def version():
moduleinfo['config'] = moduleconfig
return moduleinfo