mirror of https://github.com/MISP/PyMISP
144 lines
7.2 KiB
Python
144 lines
7.2 KiB
Python
from email.message import EmailMessage
|
||
import unittest
|
||
from io import BytesIO
|
||
from typing import List
|
||
from pymisp.tools import EMailObject
|
||
from pathlib import Path
|
||
from os import urandom
|
||
import json
|
||
from pymisp.exceptions import PyMISPNotImplementedYet, InvalidMISPObject
|
||
|
||
|
||
class TestEmailObject(unittest.TestCase):
|
||
def test_mail_1(self):
|
||
email_object = EMailObject(Path("tests/email_testfiles/mail_1.eml"))
|
||
self.assertEqual(self._get_values(email_object, "subject")[0], "письмо уведом-е")
|
||
self.assertEqual(self._get_values(email_object, "to")[0], "kinney@noth.com")
|
||
self.assertEqual(self._get_values(email_object, "from")[0], "suvorov.s@nalg.ru")
|
||
self.assertEqual(self._get_values(email_object, "from-display-name")[0], "служба ФНС Даниил Суворов")
|
||
self.assertEqual(len(self._get_values(email_object, "email-body")), 1)
|
||
|
||
self.assertEqual(self._get_values(email_object, "received-header-ip"),
|
||
['64.98.42.207', '2603:10b6:207:3d::31',
|
||
'2a01:111:f400:7e49::205', '43.230.105.145'])
|
||
|
||
self.assertIsInstance(email_object.email, EmailMessage)
|
||
for file_name, file_content in email_object.attachments:
|
||
self.assertIsInstance(file_name, str)
|
||
self.assertIsInstance(file_content, BytesIO)
|
||
|
||
def test_mail_1_headers_only(self):
|
||
email_object = EMailObject(Path("tests/email_testfiles/mail_1_headers_only.eml"))
|
||
self.assertEqual(self._get_values(email_object, "subject")[0], "письмо уведом-е")
|
||
self.assertEqual(self._get_values(email_object, "to")[0], "kinney@noth.com")
|
||
self.assertEqual(self._get_values(email_object, "from")[0], "suvorov.s@nalg.ru")
|
||
|
||
self.assertEqual(len(self._get_values(email_object, "email-body")), 0)
|
||
|
||
self.assertIsInstance(email_object.email, EmailMessage)
|
||
self.assertEqual(len(email_object.attachments), 0)
|
||
|
||
def test_mail_multiple_to(self):
|
||
email_object = EMailObject(Path("tests/email_testfiles/mail_multiple_to.eml"))
|
||
|
||
to = self._get_values(email_object, "to")
|
||
to_display_name = self._get_values(email_object, "to-display-name")
|
||
self.assertEqual(to[0], "jan.novak@example.com")
|
||
self.assertEqual(to_display_name[0], "Novak, Jan")
|
||
self.assertEqual(to[1], "jan.marek@example.com")
|
||
self.assertEqual(to_display_name[1], "Marek, Jan")
|
||
|
||
def test_msg(self):
|
||
# Test result of eml converted to msg is the same
|
||
eml_email_object = EMailObject(Path("tests/email_testfiles/mail_1.eml"))
|
||
email_object = EMailObject(Path("tests/email_testfiles/mail_1.msg"))
|
||
|
||
self.assertIsInstance(email_object.email, EmailMessage)
|
||
for file_name, file_content in email_object.attachments:
|
||
self.assertIsInstance(file_name, str)
|
||
self.assertIsInstance(file_content, BytesIO)
|
||
|
||
self.assertEqual(self._get_values(email_object, "subject")[0],
|
||
self._get_values(eml_email_object, "subject")[0])
|
||
self.assertEqual(self._get_values(email_object, "to")[0],
|
||
self._get_values(eml_email_object, "to")[0])
|
||
self.assertEqual(self._get_values(email_object, "from")[0],
|
||
self._get_values(eml_email_object, "from")[0])
|
||
self.assertEqual(self._get_values(email_object, "from-display-name")[0],
|
||
self._get_values(eml_email_object, "from-display-name")[0])
|
||
self.assertEqual(len(self._get_values(email_object, "email-body")), 2)
|
||
|
||
self.assertEqual(self._get_values(email_object, "received-header-ip"),
|
||
self._get_values(eml_email_object, "received-header-ip"))
|
||
|
||
|
||
def test_bom_encoded(self):
|
||
"""Test utf-8-sig encoded email"""
|
||
bom_email_object = EMailObject(Path("tests/email_testfiles/mail_1_bom.eml"))
|
||
eml_email_object = EMailObject(Path("tests/email_testfiles/mail_1.eml"))
|
||
|
||
self.assertIsInstance(bom_email_object.email, EmailMessage)
|
||
for file_name, file_content in bom_email_object.attachments:
|
||
self.assertIsInstance(file_name, str)
|
||
self.assertIsInstance(file_content, BytesIO)
|
||
|
||
self.assertEqual(self._get_values(bom_email_object, "subject")[0],
|
||
self._get_values(eml_email_object, "subject")[0])
|
||
self.assertEqual(self._get_values(bom_email_object, "to")[0],
|
||
self._get_values(eml_email_object, "to")[0])
|
||
self.assertEqual(self._get_values(bom_email_object, "from")[0],
|
||
self._get_values(eml_email_object, "from")[0])
|
||
self.assertEqual(self._get_values(bom_email_object, "from-display-name")[0],
|
||
self._get_values(eml_email_object, "from-display-name")[0])
|
||
self.assertEqual(len(self._get_values(bom_email_object, "email-body")), 1)
|
||
|
||
self.assertEqual(self._get_values(bom_email_object, "received-header-ip"),
|
||
self._get_values(eml_email_object, "received-header-ip"))
|
||
|
||
def test_handling_of_various_email_types(self):
|
||
self._does_not_fail(Path("tests/email_testfiles/mail_2.eml"),
|
||
"ensuring all headers work")
|
||
self._does_not_fail(Path('tests/email_testfiles/mail_3.eml'),
|
||
"Check for related content in emails emls")
|
||
self._does_not_fail(Path('tests/email_testfiles/mail_3.msg'),
|
||
"Check for related content in emails msgs")
|
||
self._does_not_fail(Path('tests/email_testfiles/mail_4.msg'),
|
||
"Check that HTML without specific encoding")
|
||
self._does_not_fail(Path('tests/email_testfiles/mail_5.msg'),
|
||
"Check encapsulated HTML works")
|
||
|
||
def _does_not_fail(self, path, test_type="test"):
|
||
found_error = None
|
||
try:
|
||
EMailObject(path)
|
||
except Exception as _e:
|
||
found_error = _e
|
||
if found_error is not None:
|
||
self.fail('Error {} raised when parsing test email {} which tests against {}. It should not have raised an error.'.format(
|
||
type(found_error),
|
||
path,
|
||
test_type))
|
||
|
||
def test_random_binary_blob(self):
|
||
"""Email parser fails correctly on random binary blob."""
|
||
random_data = urandom(1024)
|
||
random_blob = BytesIO(random_data)
|
||
found_error = None
|
||
try:
|
||
broken_obj = EMailObject(pseudofile=random_data)
|
||
except Exception as _e:
|
||
found_error = _e
|
||
if not isinstance(found_error, InvalidMISPObject):
|
||
self.fail("Expected InvalidMISPObject when EmailObject receives completely unknown binary input data. But, did not get that exception.")
|
||
try:
|
||
broken_obj = EMailObject(pseudofile=random_blob)
|
||
except Exception as _e:
|
||
found_error = _e
|
||
if not isinstance(found_error, PyMISPNotImplementedYet):
|
||
self.fail("Expected PyMISPNotImplementedYet when EmailObject receives completely unknown binary input data in a pseudofile. But, did not get that exception.")
|
||
|
||
|
||
@staticmethod
|
||
def _get_values(obj: EMailObject, relation: str) -> List[str]:
|
||
return [attr.value for attr in obj.attributes if attr['object_relation'] == relation]
|