95 lines
3.4 KiB
95 lines
3.4 KiB
#!/usr/bin/env python
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# Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import unittest
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import struct
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from rsa._compat import byte
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from rsa.common import byte_size, bit_size, inverse
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class TestByte(unittest.TestCase):
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def test_values(self):
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self.assertEqual(byte(0), b'\x00')
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self.assertEqual(byte(255), b'\xff')
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def test_struct_error_when_out_of_bounds(self):
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self.assertRaises(struct.error, byte, 256)
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self.assertRaises(struct.error, byte, -1)
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class TestByteSize(unittest.TestCase):
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def test_values(self):
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self.assertEqual(byte_size(1 << 1023), 128)
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self.assertEqual(byte_size((1 << 1024) - 1), 128)
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self.assertEqual(byte_size(1 << 1024), 129)
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self.assertEqual(byte_size(255), 1)
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self.assertEqual(byte_size(256), 2)
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self.assertEqual(byte_size(0xffff), 2)
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self.assertEqual(byte_size(0xffffff), 3)
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self.assertEqual(byte_size(0xffffffff), 4)
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self.assertEqual(byte_size(0xffffffffff), 5)
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self.assertEqual(byte_size(0xffffffffffff), 6)
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self.assertEqual(byte_size(0xffffffffffffff), 7)
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self.assertEqual(byte_size(0xffffffffffffffff), 8)
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def test_zero(self):
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self.assertEqual(byte_size(0), 1)
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def test_bad_type(self):
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self.assertRaises(TypeError, byte_size, [])
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self.assertRaises(TypeError, byte_size, ())
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self.assertRaises(TypeError, byte_size, dict())
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self.assertRaises(TypeError, byte_size, "")
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self.assertRaises(TypeError, byte_size, None)
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class TestBitSize(unittest.TestCase):
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def test_zero(self):
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self.assertEqual(bit_size(0), 0)
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def test_values(self):
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self.assertEqual(bit_size(1023), 10)
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self.assertEqual(bit_size(1024), 11)
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self.assertEqual(bit_size(1025), 11)
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self.assertEqual(bit_size(1 << 1024), 1025)
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self.assertEqual(bit_size((1 << 1024) + 1), 1025)
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self.assertEqual(bit_size((1 << 1024) - 1), 1024)
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def test_negative_values(self):
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self.assertEqual(bit_size(-1023), 10)
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self.assertEqual(bit_size(-1024), 11)
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self.assertEqual(bit_size(-1025), 11)
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self.assertEqual(bit_size(-1 << 1024), 1025)
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self.assertEqual(bit_size(-((1 << 1024) + 1)), 1025)
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self.assertEqual(bit_size(-((1 << 1024) - 1)), 1024)
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def test_bad_type(self):
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self.assertRaises(TypeError, bit_size, [])
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self.assertRaises(TypeError, bit_size, ())
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self.assertRaises(TypeError, bit_size, dict())
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self.assertRaises(TypeError, bit_size, "")
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self.assertRaises(TypeError, bit_size, None)
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self.assertRaises(TypeError, bit_size, 0.0)
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class TestInverse(unittest.TestCase):
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def test_normal(self):
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self.assertEqual(3, inverse(7, 4))
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self.assertEqual(9, inverse(5, 11))
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def test_not_relprime(self):
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self.assertRaises(ValueError, inverse, 4, 8)
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self.assertRaises(ValueError, inverse, 25, 5)
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