mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-10-18 13:59:17 +00:00
a58823cc0c
API-compatibility with the original one is retained. Now that we don't need to keep code parity with core, we could do some changes that make life easier. All generated classes are now in one file. This makes github diffs more readable, at the cost of somewhat complicating inspecting individual classes; however, that is something we shouldn't be doing anyway. Enums are now implemented as enum.IntEnum. The original class-level FIELDS member was restored. Each field is now defined via protobuf.Field, which is easier to work with in the codec, AND we're not stuffing defaults and flags into the same field.
291 lines
8.1 KiB
Python
291 lines
8.1 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2019 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 enum import IntEnum
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from io import BytesIO
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import logging
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import pytest
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from trezorlib import protobuf
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class SomeEnum(IntEnum):
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Zero = 0
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Five = 5
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TwentyFive = 25
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class WiderEnum(IntEnum):
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One = 1
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Two = 2
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Three = 3
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Four = 4
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Five = 5
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class NarrowerEnum(IntEnum):
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One = 1
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Five = 5
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class PrimitiveMessage(protobuf.MessageType):
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FIELDS = {
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1: protobuf.Field("uvarint", "uint64"),
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2: protobuf.Field("svarint", "sint64"),
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3: protobuf.Field("bool", "bool"),
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4: protobuf.Field("bytes", "bytes"),
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5: protobuf.Field("unicode", "string"),
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6: protobuf.Field("enum", SomeEnum),
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}
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class EnumMessageMoreValues(protobuf.MessageType):
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FIELDS = {1: protobuf.Field("enum", WiderEnum)}
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class EnumMessageLessValues(protobuf.MessageType):
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FIELDS = {1: protobuf.Field("enum", NarrowerEnum)}
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class RepeatedFields(protobuf.MessageType):
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FIELDS = {
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1: protobuf.Field("uintlist", "uint64", repeated=True),
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2: protobuf.Field("enumlist", SomeEnum, repeated=True),
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3: protobuf.Field("strlist", "string", repeated=True),
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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 load_message(buffer, msg_type):
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reader = BytesIO(buffer)
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return protobuf.load_message(reader, msg_type)
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def dump_message(msg):
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writer = BytesIO()
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protobuf.dump_message(writer, msg)
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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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assert load_uvarint(b"\x80\x80\x80\x80\x00") == 0
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def test_broken_uvarint():
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with pytest.raises(IOError):
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load_uvarint(b"\x80\x80")
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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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enum=SomeEnum.Five,
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)
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buf = dump_message(msg)
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retr = 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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assert retr.enum == SomeEnum.Five
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assert retr.enum == 5
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def test_validate_enum(caplog):
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caplog.set_level(logging.INFO)
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# round-trip of a valid value
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msg = EnumMessageMoreValues(enum=WiderEnum.Five)
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buf = dump_message(msg)
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retr = load_message(buf, EnumMessageLessValues)
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assert retr.enum == msg.enum
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assert not caplog.records
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# dumping an invalid enum value fails
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msg.enum = 19
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with pytest.raises(
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ValueError, match="Value 19 in field enum unknown for WiderEnum"
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):
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dump_message(msg)
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msg.enum = WiderEnum.Three
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buf = dump_message(msg)
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retr = load_message(buf, EnumMessageLessValues)
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assert len(caplog.records) == 1
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record = caplog.records.pop(0)
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assert record.levelname == "INFO"
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assert record.getMessage() == "On field enum: 3 is not a valid NarrowerEnum"
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assert retr.enum == 3
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def test_repeated():
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msg = RepeatedFields(
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uintlist=[1, 2, 3], enumlist=[0, 5, 0, 5], strlist=["hello", "world"]
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)
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buf = dump_message(msg)
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retr = load_message(buf, RepeatedFields)
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assert retr == msg
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def test_packed():
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values = [4, 44, 444]
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packed_values = b"".join(dump_uvarint(v) for v in values)
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field_id = 1 << 3 | 2 # field number 1, wire type 2
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field_len = len(packed_values)
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message_bytes = dump_uvarint(field_id) + dump_uvarint(field_len) + packed_values
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msg = load_message(message_bytes, RepeatedFields)
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assert msg
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assert msg.uintlist == values
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assert not msg.enumlist
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assert not msg.strlist
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def test_packed_enum():
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values = [0, 0, 0, 0]
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packed_values = b"".join(dump_uvarint(v) for v in values)
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field_id = 2 << 3 | 2 # field number 2, wire type 2
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field_len = len(packed_values)
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message_bytes = dump_uvarint(field_id) + dump_uvarint(field_len) + packed_values
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msg = load_message(message_bytes, RepeatedFields)
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assert msg
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assert msg.enumlist == values
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assert not msg.uintlist
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assert not msg.strlist
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class RequiredFields(protobuf.MessageType):
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FIELDS = {
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1: protobuf.Field("uvarint", "uint64", required=True),
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2: protobuf.Field("nested", PrimitiveMessage, required=True),
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}
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def test_required():
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msg = RequiredFields(uvarint=3, nested=PrimitiveMessage())
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buf = dump_message(msg)
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msg_ok = load_message(buf, RequiredFields)
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assert msg_ok == msg
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with pytest.deprecated_call():
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msg = RequiredFields(uvarint=3)
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with pytest.raises(ValueError):
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# cannot encode instance without the required fields
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dump_message(msg)
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msg = RequiredFields(uvarint=3, nested=None)
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# we can always encode an invalid message
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buf = dump_message(msg)
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with pytest.raises(ValueError):
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# required field `nested` is also not sent
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load_message(buf, RequiredFields)
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msg = RequiredFields(uvarint=None, nested=PrimitiveMessage())
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buf = dump_message(msg)
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with pytest.raises(ValueError):
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# required field `uvarint` is not sent
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load_message(buf, RequiredFields)
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class DefaultFields(protobuf.MessageType):
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FIELDS = {
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1: protobuf.Field("uvarint", "uint32", default=42),
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2: protobuf.Field("svarint", "sint32", default=-42),
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3: protobuf.Field("bool", "bool", default=True),
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4: protobuf.Field("bytes", "bytes", default=b"hello"),
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5: protobuf.Field("unicode", "string", default="hello"),
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6: protobuf.Field("enum", SomeEnum, default=SomeEnum.Five),
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}
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def test_default():
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# load empty message
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retr = load_message(b"", DefaultFields)
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assert retr.uvarint == 42
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assert retr.svarint == -42
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assert retr.bool is True
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assert retr.bytes == b"hello"
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assert retr.unicode == "hello"
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assert retr.enum == SomeEnum.Five
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msg = DefaultFields(uvarint=0)
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buf = dump_message(msg)
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retr = load_message(buf, DefaultFields)
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assert retr.uvarint == 0
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msg = DefaultFields(uvarint=None)
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buf = dump_message(msg)
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retr = load_message(buf, DefaultFields)
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assert retr.uvarint == 42
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