68 lines
2.4 KiB
Python
68 lines
2.4 KiB
Python
# Eos - Verifiable elections
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# Copyright © 2017 RunasSudo (Yingtong Li)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program 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 Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from eos.core.tests import *
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from eos.core.bigint import *
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from eos.psgjjr.bitstream import *
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from eos.psgjjr.crypto import *
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class EGTestCase(EosTestCase):
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def test_eg(self):
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pt = DEFAULT_GROUP.random_element()
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sk = EGPrivateKey.generate()
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ct = sk.public_key.encrypt(pt)
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m = sk.decrypt(ct)
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self.assertEqualJSON(pt, m)
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def test_eg_block(self):
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test_group = CyclicGroup(p=BigInt('11'), g=BigInt('2'))
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pt = BigInt('11010010011111010100101', 2)
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sk = EGPrivateKey.generate(test_group)
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ct = BitStream(pt).multiple_of(test_group.p.nbits() - 1).map(sk.public_key.encrypt, test_group.p.nbits() - 1)
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for i in range(len(ct)):
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self.assertTrue(ct[i].gamma < test_group.p)
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self.assertTrue(ct[i].delta < test_group.p)
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m = BitStream.unmap(ct, sk.decrypt, test_group.p.nbits() - 1).read()
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self.assertEqualJSON(pt, m)
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class BitStreamTestCase(EosTestCase):
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def test_bitstream(self):
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bs = BitStream(BigInt('100101011011', 2))
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self.assertEqual(bs.read(4), 0b1001)
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self.assertEqual(bs.read(4), 0b0101)
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self.assertEqual(bs.read(4), 0b1011)
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bs = BitStream()
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bs.write(BigInt('100101011011', 2))
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bs.seek(0)
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self.assertEqual(bs.read(4), 0b1001)
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self.assertEqual(bs.read(4), 0b0101)
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self.assertEqual(bs.read(4), 0b1011)
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bs.seek(4)
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bs.write(BigInt('11', 2))
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bs.seek(0)
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self.assertEqual(bs.read(4), 0b1001)
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self.assertEqual(bs.read(4), 0b1101)
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self.assertEqual(bs.read(4), 0b0110)
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self.assertEqual(bs.read(2), 0b11)
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def test_bitstream_map(self):
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bs = BitStream(BigInt('100101011011', 2))
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result = bs.map(lambda x: x, 4)
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expect = [0b1001, 0b0101, 0b1011]
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for i in range(len(expect)):
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self.assertEqual(result[i], expect[i])
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