mirror of
https://github.com/trezor/trezor-firmware.git
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317 lines
8.8 KiB
Python
317 lines
8.8 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2022 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 logging
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from enum import IntEnum
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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 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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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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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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class RecursiveMessage(protobuf.MessageType):
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FIELDS = {
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1: protobuf.Field("uvarint", "uint64"),
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2: protobuf.Field("recursivefield", "RecursiveMessage", required=False),
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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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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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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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def test_recursive():
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msg = RecursiveMessage(
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uvarint=1,
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recursivefield=RecursiveMessage(
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uvarint=2, recursivefield=RecursiveMessage(uvarint=3)
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),
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)
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buf = dump_message(msg)
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retr = load_message(buf, RecursiveMessage)
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assert msg == retr
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assert retr.uvarint == 1
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assert type(retr.recursivefield) is RecursiveMessage
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assert retr.recursivefield.uvarint == 2
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assert type(retr.recursivefield.recursivefield) is RecursiveMessage
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assert retr.recursivefield.recursivefield.uvarint == 3
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