openstack/deb-python-cassandra-driver
Code Issues Proposed changes

Bounds checking for uuid clock_seq

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Adam Holmberg
2015-03-16 15:14:19 -05:00
parent 8409730775
commit 66791fd9f6
1 changed files with 4 additions and 0 deletions
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4
cassandra/util.py
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@@ -106,6 +106,10 @@ def uuid_from_time(time_arg, node=None, clock_seq=None):
if clock_seq is None: if clock_seq is None:
clock_seq = random.getrandbits(14) clock_seq = random.getrandbits(14)
else:
if clock_seq > 0x3fff:
raise ValueError('clock_seq is out of range (need a 14-bit value)')
clock_seq_low = clock_seq & 0xff clock_seq_low = clock_seq & 0xff
clock_seq_hi_variant = 0x80 | ((clock_seq >> 8) & 0x3f) clock_seq_hi_variant = 0x80 | ((clock_seq >> 8) & 0x3f)