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47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2018 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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import math
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from .common import TrezorTest
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from trezorlib import misc
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import trezorlib.messages as proto
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def entropy(data):
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counts = {}
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for c in data:
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if c in counts:
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counts[c] += 1
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else:
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counts[c] = 1
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e = 0
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for _, v in counts.items():
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p = 1.0 * v / len(data)
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e -= p * math.log(p, 256)
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return e
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class TestMsgGetentropy(TrezorTest):
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def test_entropy(self):
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for l in [0, 1, 2, 3, 4, 5, 8, 9, 16, 17, 32, 33, 64, 65, 128, 129, 256, 257, 512, 513, 1024]:
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with self.client:
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self.client.set_expected_responses([proto.ButtonRequest(code=proto.ButtonRequestType.ProtectCall), proto.Entropy()])
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ent = misc.get_entropy(self.client, l)
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assert len(ent) == l
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print('entropy = ', entropy(ent))
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