commit dd071270d705507f0131bfceac7358f7223ec32d Author: Damian Johnson atagar@torproject.org Date: Sun Aug 19 21:25:59 2012 -0700

Asserting that _decode_fingerprint() output is a fingerprint

Checking that the _decode_fingerprint() function returns a fingerprint, throwing a ValueError if it doesn't. Also adding some tests for this. --- stem/descriptor/networkstatus.py | 6 ++++++ test/unit/descriptor/networkstatus.py | 4 ++++ 2 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/stem/descriptor/networkstatus.py b/stem/descriptor/networkstatus.py index 485234f..d08f316 100644 --- a/stem/descriptor/networkstatus.py +++ b/stem/descriptor/networkstatus.py @@ -53,6 +53,7 @@ import stem.descriptor import stem.version import stem.exit_policy import stem.util.enum +import stem.util.tor_tools

from stem.descriptor import _read_until_keywords, _peek_keyword, _strptime from stem.descriptor import _read_keyword_line, _read_keyword_line_str, _get_pseudo_pgp_block, _peek_line @@ -779,6 +780,8 @@ def _decode_fingerprint(identity): :param str identity: encoded fingerprint from the consensus

:returns: str with the uppercase hex encoding of the relay's fingerprint + + :raises: ValueError if the result isn't a valid fingerprint """

# trailing equal signs were stripped from the identity @@ -799,5 +802,8 @@ def _decode_fingerprint(identity):

fingerprint += hex(ord(char))[2:].zfill(2).upper()

+ if not stem.util.tor_tools.is_valid_fingerprint(fingerprint): + raise ValueError("Decoded '%s' to be '%s', which isn't a valid fingerprint" % (identity, fingerprint)) + return fingerprint

diff --git a/test/unit/descriptor/networkstatus.py b/test/unit/descriptor/networkstatus.py index ec69367..f14c2be 100644 --- a/test/unit/descriptor/networkstatus.py +++ b/test/unit/descriptor/networkstatus.py @@ -24,4 +24,8 @@ class TestNetworkStatus(unittest.TestCase):

for arg, expected in test_values.items(): self.assertEqual(expected, networkstatus._decode_fingerprint(arg)) + + self.assertRaises(ValueError, networkstatus._decode_fingerprint, '') + self.assertRaises(ValueError, networkstatus._decode_fingerprint, '20wYcb') + self.assertRaises(ValueError, networkstatus._decode_fingerprint, '20wYcb' * 30)