1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
# Import libnacl libs
import libnacl.sign
# Import pythonlibs
import unittest
class TestStream(unittest.TestCase):
def test_stream_rejects_wrong_lengths(self):
"""
Too few bytes in a key or nonce passed through to libsodium will lead to bytes past the end
of the string being read. We should be guarding against this dangerous case.
"""
msg_len = 100 # whatever
good_nonce= b'Nonces must be 24 bytes.'
good_key = b'This valid key is 32 bytes long.'
for bad_nonce in (b'too short', b'too long' * 100):
with self.assertRaises(ValueError) as context:
libnacl.crypto_stream(msg_len, bad_nonce, good_key)
self.assertEqual(context.exception.args, ('Invalid nonce',))
for bad_key in (b'too short', b'too long' * 100):
with self.assertRaises(ValueError) as context:
libnacl.crypto_stream(msg_len, good_nonce, bad_key)
self.assertEqual(context.exception.args, ('Invalid secret key',))
def test_stream_xor_rejects_wrong_lengths(self):
"""
Too few bytes in a key or nonce passed through to libsodium will lead to bytes past the end
of the string being read. We should be guarding against this dangerous case.
"""
msg = b'The message does not matter.'
good_nonce = b'Nonces must be 24 bytes.'
good_key = b'This valid key is 32 bytes long.'
for bad_nonce in (b'too short', b'too long' * 100):
with self.assertRaises(ValueError) as context:
libnacl.crypto_stream_xor(msg, bad_nonce, good_key)
self.assertEqual(context.exception.args, ('Invalid nonce',))
for bad_key in (b'too short', b'too long' * 100):
with self.assertRaises(ValueError) as context:
libnacl.crypto_stream_xor(msg, good_nonce, bad_key)
self.assertEqual(context.exception.args, ('Invalid secret key',))
|
