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146 lines
4.5 KiB
146 lines
4.5 KiB
# 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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import os
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import subprocess
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import tempfile
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import time
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from collections import defaultdict
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from trezorlib.debuglink import TrezorClientDebugLink
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from trezorlib.transport import TransportException, get_transport
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BINDIR = os.path.dirname(os.path.abspath(__file__)) + "/emulators"
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ROOT = os.path.dirname(os.path.abspath(__file__)) + "/../"
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LOCAL_BUILD_PATHS = {
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"core": ROOT + "core/build/unix/micropython",
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"legacy": ROOT + "legacy/firmware/trezor.elf",
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}
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ENV = {"SDL_VIDEODRIVER": "dummy"}
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def check_version(tag, version_tuple):
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if tag is not None and tag.startswith("v") and len(tag.split(".")) == 3:
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version = ".".join(str(i) for i in version_tuple)
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if tag[1:] != version:
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raise RuntimeError(f"Version mismatch: tag {tag} reports version {version}")
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def filename_from_tag(gen, tag):
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return f"{BINDIR}/trezor-emu-{gen}-{tag}"
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def get_tags():
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files = os.listdir(BINDIR)
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if not files:
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raise ValueError(
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"No files found. Use download_emulators.sh to download emulators."
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)
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result = defaultdict(list)
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for f in sorted(files):
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try:
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# example: "trezor-emu-core-v2.1.1"
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_, _, gen, tag = f.split("-", maxsplit=3)
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result[gen].append(tag)
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except ValueError:
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pass
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return result
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ALL_TAGS = get_tags()
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class EmulatorWrapper:
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def __init__(self, gen, tag=None, executable=None, storage=None):
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self.gen = gen
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self.tag = tag
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if executable is not None:
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self.executable = executable
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elif tag is not None:
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self.executable = filename_from_tag(gen, tag)
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else:
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self.executable = LOCAL_BUILD_PATHS[gen]
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if not os.path.exists(self.executable):
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raise ValueError(f"emulator executable not found: {self.executable}")
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self.workdir = tempfile.TemporaryDirectory()
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if storage:
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open(self._storage_file(), "wb").write(storage)
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self.client = None
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def __enter__(self):
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args = [self.executable]
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env = ENV
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if self.gen == "core":
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args += ["-m", "main"]
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# for firmware 2.1.2 and newer
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env["TREZOR_PROFILE_DIR"] = self.workdir.name
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# for firmware 2.1.1 and older
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env["TREZOR_PROFILE"] = self.workdir.name
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self.process = subprocess.Popen(
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args, cwd=self.workdir.name, env=env, stdout=open(os.devnull, "w")
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)
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# wait until emulator is listening
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for _ in range(100):
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try:
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time.sleep(0.1)
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transport = get_transport("udp:127.0.0.1:21324")
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break
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except TransportException:
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pass
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if self.process.poll() is not None:
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self._cleanup()
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raise RuntimeError("Emulator proces died")
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else:
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# could not connect after 100 attempts * 0.1s = 10s of waiting
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self._cleanup()
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raise RuntimeError("Can't connect to emulator")
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self.client = TrezorClientDebugLink(transport)
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self.client.open()
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check_version(self.tag, self.client.version)
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self._cleanup()
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return False
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def _cleanup(self):
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if self.client:
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self.client.close()
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self.process.terminate()
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try:
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self.process.wait(1)
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except subprocess.TimeoutExpired:
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self.process.kill()
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self.workdir.cleanup()
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def _storage_file(self):
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if self.gen == "legacy":
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return self.workdir.name + "/emulator.img"
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elif self.gen == "core":
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return self.workdir.name + "/trezor.flash"
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else:
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raise ValueError("Unknown gen")
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def storage(self):
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return open(self._storage_file(), "rb").read()
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