128 lines
4.5 KiB
Python
128 lines
4.5 KiB
Python
from __future__ import unicode_literals
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import time
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from django.core import signing
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from django.test import TestCase
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from django.utils.encoding import force_str
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from django.utils import six
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class TestSigner(TestCase):
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def test_signature(self):
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"signature() method should generate a signature"
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signer = signing.Signer('predictable-secret')
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signer2 = signing.Signer('predictable-secret2')
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for s in (
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b'hello',
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b'3098247:529:087:',
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'\u2019'.encode('utf-8'),
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):
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self.assertEqual(
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signer.signature(s),
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signing.base64_hmac(signer.salt + 'signer', s,
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'predictable-secret').decode()
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)
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self.assertNotEqual(signer.signature(s), signer2.signature(s))
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def test_signature_with_salt(self):
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"signature(value, salt=...) should work"
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signer = signing.Signer('predictable-secret', salt='extra-salt')
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self.assertEqual(
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signer.signature('hello'),
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signing.base64_hmac('extra-salt' + 'signer',
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'hello', 'predictable-secret').decode()
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)
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self.assertNotEqual(
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signing.Signer('predictable-secret', salt='one').signature('hello'),
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signing.Signer('predictable-secret', salt='two').signature('hello'))
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def test_sign_unsign(self):
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"sign/unsign should be reversible"
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signer = signing.Signer('predictable-secret')
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examples = [
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'q;wjmbk;wkmb',
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'3098247529087',
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'3098247:529:087:',
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'jkw osanteuh ,rcuh nthu aou oauh ,ud du',
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'\u2019',
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]
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if not six.PY3:
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examples.append(b'a byte string')
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for example in examples:
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signed = signer.sign(example)
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self.assertIsInstance(signed, str)
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self.assertNotEqual(force_str(example), signed)
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self.assertEqual(example, signer.unsign(signed))
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def unsign_detects_tampering(self):
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"unsign should raise an exception if the value has been tampered with"
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signer = signing.Signer('predictable-secret')
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value = 'Another string'
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signed_value = signer.sign(value)
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transforms = (
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lambda s: s.upper(),
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lambda s: s + 'a',
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lambda s: 'a' + s[1:],
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lambda s: s.replace(':', ''),
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)
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self.assertEqual(value, signer.unsign(signed_value))
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for transform in transforms:
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self.assertRaises(
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signing.BadSignature, signer.unsign, transform(signed_value))
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def test_dumps_loads(self):
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"dumps and loads be reversible for any JSON serializable object"
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objects = [
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['a', 'list'],
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'a unicode string \u2019',
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{'a': 'dictionary'},
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]
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if not six.PY3:
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objects.append(b'a byte string')
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for o in objects:
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self.assertNotEqual(o, signing.dumps(o))
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self.assertEqual(o, signing.loads(signing.dumps(o)))
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self.assertNotEqual(o, signing.dumps(o, compress=True))
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self.assertEqual(o, signing.loads(signing.dumps(o, compress=True)))
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def test_decode_detects_tampering(self):
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"loads should raise exception for tampered objects"
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transforms = (
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lambda s: s.upper(),
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lambda s: s + 'a',
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lambda s: 'a' + s[1:],
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lambda s: s.replace(':', ''),
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)
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value = {
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'foo': 'bar',
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'baz': 1,
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}
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encoded = signing.dumps(value)
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self.assertEqual(value, signing.loads(encoded))
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for transform in transforms:
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self.assertRaises(
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signing.BadSignature, signing.loads, transform(encoded))
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class TestTimestampSigner(TestCase):
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def test_timestamp_signer(self):
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value = 'hello'
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_time = time.time
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time.time = lambda: 123456789
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try:
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signer = signing.TimestampSigner('predictable-key')
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ts = signer.sign(value)
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self.assertNotEqual(ts,
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signing.Signer('predictable-key').sign(value))
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self.assertEqual(signer.unsign(ts), value)
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time.time = lambda: 123456800
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self.assertEqual(signer.unsign(ts, max_age=12), value)
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self.assertEqual(signer.unsign(ts, max_age=11), value)
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self.assertRaises(
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signing.SignatureExpired, signer.unsign, ts, max_age=10)
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finally:
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time.time = _time
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