import sys sys.path.append('../src') from utest import * from ustruct import pack from trezor import io from trezor.loop import select from trezor.utils import chunks from trezor.wire import codec_v2 from ubinascii import unhexlify class MockHID: def __init__(self, num): self.num = num self.data = [] def iface_num(self): return self.num def write(self, msg): self.data.append(bytearray(msg)) return len(msg) def test_reader(): rep_len = 64 interface_num = 0xdeadbeef session_id = 0x12345678 message_type = 0x87654321 message_len = 250 interface = MockHID(interface_num) reader = codec_v2.Reader(interface, session_id) message = bytearray(range(message_len)) report_header = bytearray(unhexlify('011234567887654321000000fa')) # open, expected one read first_report = report_header + message[:rep_len - len(report_header)] assert_async(reader.aopen(), [(None, select(io.POLL_READ | interface_num)), (first_report, StopIteration()), ]) assert_eq(reader.type, message_type) assert_eq(reader.size, message_len) # empty read empty_buffer = bytearray() assert_async(reader.areadinto(empty_buffer), [(None, StopIteration()), ]) assert_eq(len(empty_buffer), 0) assert_eq(reader.size, message_len) # short read, expected no read short_buffer = bytearray(32) assert_async(reader.areadinto(short_buffer), [(None, StopIteration()), ]) assert_eq(len(short_buffer), 32) assert_eq(short_buffer, message[:len(short_buffer)]) assert_eq(reader.size, message_len - len(short_buffer)) # aligned read, expected no read aligned_buffer = bytearray(rep_len - len(report_header) - len(short_buffer)) assert_async(reader.areadinto(aligned_buffer), [(None, StopIteration()), ]) assert_eq(aligned_buffer, message[len(short_buffer):][:len(aligned_buffer)]) assert_eq(reader.size, message_len - len(short_buffer) - len(aligned_buffer)) # one byte read, expected one read next_report_header = bytearray(unhexlify('021234567800000000')) next_report = next_report_header + message[rep_len - len(report_header):][:rep_len - len(next_report_header)] onebyte_buffer = bytearray(1) assert_async(reader.areadinto(onebyte_buffer), [(None, select(io.POLL_READ | interface_num)), (next_report, StopIteration()), ]) assert_eq(onebyte_buffer, message[len(short_buffer):][len(aligned_buffer):][:len(onebyte_buffer)]) assert_eq(reader.size, message_len - len(short_buffer) - len(aligned_buffer) - len(onebyte_buffer)) # too long read, raises eof assert_async(reader.areadinto(bytearray(reader.size + 1)), [(None, EOFError()), ]) # long read, expect multiple reads start_size = reader.size long_buffer = bytearray(start_size) report_payload = message[rep_len - len(report_header) + rep_len - len(next_report_header):] report_payload_head = report_payload[:rep_len - len(next_report_header) - len(onebyte_buffer)] report_payload_rest = report_payload[len(report_payload_head):] report_payload_rest = list(chunks(report_payload_rest, rep_len - len(next_report_header))) report_payloads = [report_payload_head] + report_payload_rest next_reports = [bytearray(unhexlify('0212345678') + pack('>L', i + 1)) + r for i, r in enumerate(report_payloads)] expected_syscalls = [] for i, _ in enumerate(next_reports): prev_report = next_reports[i - 1] if i > 0 else None expected_syscalls.append((prev_report, select(io.POLL_READ | interface_num))) expected_syscalls.append((next_reports[-1], StopIteration())) assert_async(reader.areadinto(long_buffer), expected_syscalls) assert_eq(long_buffer, message[-start_size:]) assert_eq(reader.size, 0) # one byte read, raises eof assert_async(reader.areadinto(onebyte_buffer), [(None, EOFError()), ]) def test_writer(): rep_len = 64 interface_num = 0xdeadbeef session_id = 0x12345678 message_type = 0x87654321 message_len = 1024 interface = MockHID(interface_num) writer = codec_v2.Writer(interface, session_id) writer.setheader(message_type, message_len) # init header corresponding to the data above report_header = bytearray(unhexlify('01123456788765432100000400')) assert_eq(writer.data, report_header + bytearray(64 - len(report_header))) # empty write start_size = writer.size assert_async(writer.awrite(bytearray()), [(None, StopIteration()), ]) assert_eq(writer.data, report_header + bytearray(rep_len - len(report_header))) assert_eq(writer.size, start_size) # short write, expected no report start_size = writer.size short_payload = bytearray(range(4)) assert_async(writer.awrite(short_payload), [(None, StopIteration()), ]) assert_eq(writer.size, start_size - len(short_payload)) assert_eq(writer.data, report_header + short_payload + bytearray(rep_len - len(report_header) - len(short_payload))) # aligned write, expected one report start_size = writer.size aligned_payload = bytearray(range(rep_len - len(report_header) - len(short_payload))) assert_async(writer.awrite(aligned_payload), [(None, select(io.POLL_WRITE | interface_num)), (None, StopIteration()), ]) assert_eq(interface.data, [report_header + short_payload + aligned_payload + bytearray(rep_len - len(report_header) - len(short_payload) - len(aligned_payload)), ]) assert_eq(writer.size, start_size - len(aligned_payload)) interface.data.clear() # short write, expected no report, but data starts with correct seq and cont marker report_header = bytearray(unhexlify('021234567800000000')) start_size = writer.size assert_async(writer.awrite(short_payload), [(None, StopIteration()), ]) assert_eq(writer.size, start_size - len(short_payload)) assert_eq(writer.data[:len(report_header) + len(short_payload)], report_header + short_payload) # long write, expected multiple reports start_size = writer.size long_payload_head = bytearray(range(rep_len - len(report_header) - len(short_payload))) long_payload_rest = bytearray(range(start_size - len(long_payload_head))) long_payload = long_payload_head + long_payload_rest expected_payloads = [short_payload + long_payload_head] + list(chunks(long_payload_rest, rep_len - len(report_header))) expected_reports = [ bytearray(unhexlify('0212345678') + pack('>L', seq)) + rep for seq, rep in enumerate(expected_payloads)] expected_reports[-1] += bytearray(bytes(1) * (rep_len - len(expected_reports[-1]))) # test write expected_write_reports = expected_reports[:-1] assert_async(writer.awrite(long_payload), len(expected_write_reports) * [(None, select(io.POLL_WRITE | interface_num))] + [(None, StopIteration())]) assert_eq(interface.data, expected_write_reports) assert_eq(writer.size, start_size - len(long_payload)) interface.data.clear() # test write raises eof assert_async(writer.awrite(bytearray(1)), [(None, EOFError())]) assert_eq(interface.data, []) # test close expected_close_reports = expected_reports[-1:] assert_async(writer.aclose(), len(expected_close_reports) * [(None, select(io.POLL_WRITE | interface_num))] + [(None, StopIteration())]) assert_eq(interface.data, expected_close_reports) assert_eq(writer.size, 0) interface.data.clear() if __name__ == '__main__': run_tests()