class TestSetQuestionRegex(unittest.TestCase):
def setUp(self):
self.telnet = Mock(spec=Telnet)
self.ctfqa = CTFQA(self.telnet)
def test_invalid_regex(self):
with self.assertRaises(re.error):
self.ctfqa.setQuestionRegex("[")
def test_succeeds(self):
with LogCapture() as log_capture:
self.ctfqa.setQuestionRegex("(\d*)")
log_capture.check(
(MODULE_NAME, "INFO", "Set question regex to \"(\d*)\""))
class TestSolve(unittest.TestCase):
def setUp(self):
self.telnet = Mock(spec=Telnet)
self.ctfqa = CTFQA(self.telnet)
def test_question_regex_not_set(self):
self.ctfqa.setAnswerCallback(lambda *args: None)
exception_message = "You need to call setQuestionRegex first."
with LogCapture() as log_capture:
with self.assertRaisesRegex(NotConfiguredError, exception_message):
self.ctfqa.solve()
log_capture.check((MODULE_NAME, "ERROR", exception_message))
def test_answer_callback_not_set(self):
self.ctfqa.setQuestionRegex("")
exception_message = "You need to call setAnswerCallback first."
with LogCapture() as log_capture:
with self.assertRaisesRegex(NotConfiguredError, exception_message):
self.ctfqa.solve()
log_capture.check((MODULE_NAME, "ERROR", exception_message))
def test_solve_succeeds(self):
expected_flag = "flag{b34n5_4nd_s4us463s}"
self.telnet.read_until.side_effect = [
b"What is 6 + 4?", b"What is 145 + 208?",
b"What is 43717893 + 327890432?",
expected_flag.encode(),
EOFError()
]
# The callback function that is used to generate the answer
def add(a, b):
return str(int(a) + int(b))
self.ctfqa.setQuestionRegex("What is (\d*) \+ (\d*)\?")
self.ctfqa.setAnswerCallback(add)
with LogCapture() as log_capture:
actual_flag = self.ctfqa.solve()
log_capture.check(
(MODULE_NAME, "INFO", "Q: What is 6 + 4?"),
(MODULE_NAME, "INFO", "A: 10"),
(MODULE_NAME, "INFO", "Q: What is 145 + 208?"),
(MODULE_NAME, "INFO", "A: 353"),
(MODULE_NAME, "INFO", "Q: What is 43717893 + 327890432?"),
(MODULE_NAME, "INFO", "A: 371608325"),
(MODULE_NAME, "INFO", "Returning unrecognised response"))
self.telnet.read_until.assert_has_calls([
call(b"\n", timeout=30),
call(b"\n", timeout=30),
call(b"\n", timeout=30)
])
self.telnet.write.assert_has_calls(
[call(b"10\n"),
call(b"353\n"),
call(b"371608325\n")])
self.assertEqual(expected_flag, actual_flag)
def test_solve_connection_closed(self):
self.telnet.read_until.side_effect = EOFError()
# The callback function that is used to generate the answer
def multiply(a, b):
return str(int(a) * int(b))
self.ctfqa.setQuestionRegex("(\d*) \* (\d*)")
self.ctfqa.setAnswerCallback(multiply)
exception_message = "There is no more output to read."
with LogCapture() as log_capture:
with self.assertRaisesRegex(ConnectionError, exception_message):
self.ctfqa.solve()
log_capture.check((MODULE_NAME, "ERROR", exception_message))
def test_solve_connection_closed_halfway(self):
self.telnet.read_until.side_effect = [b"3 * 8", EOFError()]
# The callback function that is used to generate the answer
def multiply(a, b):
return str(int(a) * int(b))
self.ctfqa.setQuestionRegex("(\d*) \* (\d*)")
self.ctfqa.setAnswerCallback(multiply)
exception_message = "There is no more output to read."
with LogCapture() as log_capture:
with self.assertRaisesRegex(ConnectionError, exception_message):
self.ctfqa.solve()
log_capture.check((MODULE_NAME, "INFO", "Q: 3 * 8"),
(MODULE_NAME, "INFO", "A: 24"),
(MODULE_NAME, "ERROR", exception_message))
self.telnet.read_until.assert_has_calls(
[call(b"\n", timeout=30),
call(b"\n", timeout=30)])
self.telnet.write.assert_called_once_with(b"24\n")
def test_solve_incorrect_answer_response(self):
expected_last_response = "WRONG"
self.telnet.read_until.side_effect = [
b"Please add 4 and 9:", b"Please add 105 and 87:",
expected_last_response.encode(),
EOFError()
]
# The callback function that is used to generate the answer
def add(a, b):
return str(int(a) + int(b))
self.ctfqa.setQuestionRegex("Please add (\d*) and (\d*):")
self.ctfqa.setAnswerCallback(add)
actual_last_response = self.ctfqa.solve()
self.telnet.read_until.assert_has_calls([
call(b"\n", timeout=30),
call(b"\n", timeout=30),
call(b"\n", timeout=30)
])
self.telnet.write.assert_has_calls([call(b"13\n"), call(b"192\n")])
self.assertEqual(expected_last_response, actual_last_response)
def test_solve_os_error(self):
self.telnet.read_until.side_effect = [
b"'Concatenate' 'this string together'"
]
self.telnet.write.side_effect = [OSError()]
# The callback function that is used to generate the answer
def concatenate(a, b):
return "{} {}".format(a, b)
self.ctfqa.setQuestionRegex("'([^']*)' '([^']*)'")
self.ctfqa.setAnswerCallback(concatenate)
exception_message = "Tried to write to a closed connection."
with LogCapture() as log_capture:
with self.assertRaisesRegex(ConnectionError, exception_message):
self.ctfqa.solve()
log_capture.check(
(MODULE_NAME, "INFO",
"Q: 'Concatenate' 'this string together'"),
(MODULE_NAME, "INFO", "A: Concatenate this string together"),
(MODULE_NAME, "ERROR", exception_message))