Modules for expansion services, import and export in MISP
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import json
import pypssl
from pymisp import MISPAttribute, MISPEvent, MISPObject
mispattributes = {'input': ['ip-src', 'ip-dst', 'ip-src|port', 'ip-dst|port'], 'format': 'misp_standard'}
moduleinfo = {'version': '0.2', 'author': 'Raphaël Vinot',
'description': 'Module to access CIRCL Passive SSL',
'module-type': ['expansion', 'hover']}
moduleconfig = ['username', 'password']
class PassiveSSLParser():
def __init__(self, attribute, authentication):
self.misp_event = MISPEvent()
self.attribute = MISPAttribute()
self.pssl = pypssl.PyPSSL(basic_auth=authentication)
self.cert_hash = 'x509-fingerprint-sha1'
self.cert_type = 'pem'
self.mapping = {'issuer': ('text', 'issuer'),
'keylength': ('text', 'pubkey-info-size'),
'not_after': ('datetime', 'validity-not-after'),
'not_before': ('datetime', 'validity-not-before'),
'subject': ('text', 'subject')}
def get_results(self):
if hasattr(self, 'result'):
return self.result
event = json.loads(self.misp_event.to_json())
results = {key: event[key] for key in ('Attribute', 'Object')}
return {'results': results}
def parse(self):
value = self.attribute.value.split('|')[0] if '|' in self.attribute.type else self.attribute.value
results = self.pssl.query(value)
except Exception:
self.result = {'error': 'There is an authentication error, please make sure you supply correct credentials.'}
if not results:
self.result = {'error': 'Not found'}
if 'error' in results:
self.result = {'error': results['error']}
for ip_address, certificates in results.items():
ip_uuid = self._handle_ip_attribute(ip_address)
for certificate in certificates['certificates']:
self._handle_certificate(certificate, ip_uuid)
def _handle_certificate(self, certificate, ip_uuid):
x509 = MISPObject('x509')
x509.add_attribute(self.cert_hash, type=self.cert_hash, value=certificate)
cert_details = self.pssl.fetch_cert(certificate)
info = cert_details['info']
for feature, mapping in self.mapping.items():
attribute_type, object_relation = mapping
x509.add_attribute(object_relation, type=attribute_type, value=info[feature])
x509.add_attribute(self.cert_type, type='text', value=self.cert_type)
x509.add_reference(ip_uuid, 'seen-by')
def _handle_ip_attribute(self, ip_address):
if ip_address == self.attribute.value:
return self.attribute.uuid
ip_attribute = MISPAttribute()
ip_attribute.from_dict(**{'type': self.attribute.type, 'value': ip_address})
return ip_attribute.uuid
def handler(q=False):
if q is False:
return False
request = json.loads(q)
if not request.get('config'):
return {'error': 'CIRCL Passive SSL authentication is missing.'}
if not request['config'].get('username') or not request['config'].get('password'):
return {'error': 'CIRCL Passive SSL authentication is incomplete, please provide your username and password.'}
authentication = (request['config']['username'], request['config']['password'])
if not request.get('attribute'):
return {'error': 'Unsupported input.'}
attribute = request['attribute']
if not any(input_type == attribute['type'] for input_type in mispattributes['input']):
return {'error': 'Unsupported attributes type'}
pssl_parser = PassiveSSLParser(attribute, authentication)
return pssl_parser.get_results()
def introspection():
return mispattributes
def version():
moduleinfo['config'] = moduleconfig
return moduleinfo