python-trezor/tests/test_msg_getentropy.py

33 lines
924 B
Python

import unittest
import common
import math
import trezorlib.messages_pb2 as proto
import trezorlib.types_pb2 as proto_types
def entropy(data):
counts = {}
for c in data:
if c in counts:
counts[c] += 1
else:
counts[c] = 1
e = 0
for _, v in counts.iteritems():
p = 1.0 * v / len(data)
e -= p * math.log(p, 256)
return e
class TestMsgGetentropy(common.TrezorTest):
def test_entropy(self):
for l in [0, 1, 2, 3, 4, 5, 8, 9, 16, 17, 32, 33, 64, 65, 128, 129, 256, 257, 512, 513, 1024]:
with self.client:
self.client.set_expected_responses([proto.ButtonRequest(code=proto_types.ButtonRequest_Other), proto.Entropy()])
ent = self.client.get_entropy(l)
self.assertTrue(len(ent) >= l)
print 'entropy = ', entropy(ent)
if __name__ == '__main__':
unittest.main()