mirror of
https://github.com/trezor/trezor-firmware.git
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104 lines
3.0 KiB
Python
104 lines
3.0 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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from io import BytesIO
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import pytest
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from trezorlib import protobuf
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class PrimitiveMessage(protobuf.MessageType):
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FIELDS = {
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0: ("uvarint", protobuf.UVarintType, 0),
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1: ("svarint", protobuf.SVarintType, 0),
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2: ("bool", protobuf.BoolType, 0),
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3: ("bytes", protobuf.BytesType, 0),
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4: ("unicode", protobuf.UnicodeType, 0),
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}
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def load_uvarint(buffer):
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reader = BytesIO(buffer)
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return protobuf.load_uvarint(reader)
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def dump_uvarint(value):
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writer = BytesIO()
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protobuf.dump_uvarint(writer, value)
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return writer.getvalue()
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def test_dump_uvarint():
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assert dump_uvarint(0) == b"\x00"
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assert dump_uvarint(1) == b"\x01"
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assert dump_uvarint(0xff) == b"\xff\x01"
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assert dump_uvarint(123456) == b"\xc0\xc4\x07"
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with pytest.raises(ValueError):
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dump_uvarint(-1)
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def test_load_uvarint():
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assert load_uvarint(b"\x00") == 0
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assert load_uvarint(b"\x01") == 1
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assert load_uvarint(b"\xff\x01") == 0xff
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assert load_uvarint(b"\xc0\xc4\x07") == 123456
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def test_sint_uint():
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"""
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Protobuf interleaved signed encoding
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https://developers.google.com/protocol-buffers/docs/encoding#structure
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LSbit is sign, rest is shifted absolute value.
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Or, by example, you count like so: 0, -1, 1, -2, 2, -3 ...
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"""
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assert protobuf.sint_to_uint(0) == 0
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assert protobuf.uint_to_sint(0) == 0
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assert protobuf.sint_to_uint(-1) == 1
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assert protobuf.sint_to_uint(1) == 2
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assert protobuf.uint_to_sint(1) == -1
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assert protobuf.uint_to_sint(2) == 1
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# roundtrip:
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assert protobuf.uint_to_sint(protobuf.sint_to_uint(1234567891011)) == 1234567891011
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assert protobuf.uint_to_sint(protobuf.sint_to_uint(-2 ** 32)) == -2 ** 32
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def test_simple_message():
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msg = PrimitiveMessage(
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uvarint=12345678910,
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svarint=-12345678910,
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bool=True,
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bytes=b"\xDE\xAD\xCA\xFE",
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unicode="Příliš žluťoučký kůň úpěl ďábelské ódy 😊",
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)
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buf = BytesIO()
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protobuf.dump_message(buf, msg)
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buf.seek(0)
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retr = protobuf.load_message(buf, PrimitiveMessage)
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assert msg == retr
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assert retr.uvarint == 12345678910
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assert retr.svarint == -12345678910
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assert retr.bool is True
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assert retr.bytes == b"\xDE\xAD\xCA\xFE"
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assert retr.unicode == "Příliš žluťoučký kůň úpěl ďábelské ódy 😊"
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