mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-23 23:08:14 +00:00
174 lines
7.2 KiB
Python
174 lines
7.2 KiB
Python
import sys
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sys.path.append('../src')
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from utest import *
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from ustruct import pack, unpack
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from ubinascii import hexlify, unhexlify
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from trezor import io
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from trezor.loop import select, Syscall
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from trezor.crypto import random
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from trezor.utils import chunks
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from trezor.wire import codec_v1
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class MockHID:
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def __init__(self, num):
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self.num = num
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self.data = []
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def iface_num(self):
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return self.num
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def write(self, msg):
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self.data.append(bytearray(msg))
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return len(msg)
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def test_reader():
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rep_len = 64
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interface_num = 0xdeadbeef
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message_type = 0x4321
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message_len = 250
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interface = MockHID(interface_num)
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reader = codec_v1.Reader(interface)
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message = bytearray(range(message_len))
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report_header = bytearray(unhexlify('3f23234321000000fa'))
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# open, expected one read
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first_report = report_header + message[:rep_len - len(report_header)]
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assert_async(reader.aopen(), [(None, select(io.POLL_READ | interface_num)), (first_report, StopIteration()), ])
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assert_eq(reader.type, message_type)
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assert_eq(reader.size, message_len)
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# empty read
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empty_buffer = bytearray()
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assert_async(reader.areadinto(empty_buffer), [(None, StopIteration()), ])
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assert_eq(len(empty_buffer), 0)
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assert_eq(reader.size, message_len)
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# short read, expected no read
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short_buffer = bytearray(32)
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assert_async(reader.areadinto(short_buffer), [(None, StopIteration()), ])
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assert_eq(len(short_buffer), 32)
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assert_eq(short_buffer, message[:len(short_buffer)])
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assert_eq(reader.size, message_len - len(short_buffer))
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# aligned read, expected no read
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aligned_buffer = bytearray(rep_len - len(report_header) - len(short_buffer))
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assert_async(reader.areadinto(aligned_buffer), [(None, StopIteration()), ])
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assert_eq(aligned_buffer, message[len(short_buffer):][:len(aligned_buffer)])
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assert_eq(reader.size, message_len - len(short_buffer) - len(aligned_buffer))
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# one byte read, expected one read
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next_report_header = bytearray(unhexlify('3f'))
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next_report = next_report_header + message[rep_len - len(report_header):][:rep_len - len(next_report_header)]
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onebyte_buffer = bytearray(1)
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assert_async(reader.areadinto(onebyte_buffer), [(None, select(io.POLL_READ | interface_num)), (next_report, StopIteration()), ])
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assert_eq(onebyte_buffer, message[len(short_buffer):][len(aligned_buffer):][:len(onebyte_buffer)])
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assert_eq(reader.size, message_len - len(short_buffer) - len(aligned_buffer) - len(onebyte_buffer))
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# too long read, raises eof
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assert_async(reader.areadinto(bytearray(reader.size + 1)), [(None, EOFError()), ])
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# long read, expect multiple reads
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start_size = reader.size
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long_buffer = bytearray(start_size)
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report_payload = message[rep_len - len(report_header) + rep_len - len(next_report_header):]
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report_payload_head = report_payload[:rep_len - len(next_report_header) - len(onebyte_buffer)]
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report_payload_rest = report_payload[len(report_payload_head):]
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report_payload_rest = list(chunks(report_payload_rest, rep_len - len(next_report_header)))
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report_payloads = [report_payload_head] + report_payload_rest
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next_reports = [next_report_header + r for r in report_payloads]
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expected_syscalls = []
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for i, _ in enumerate(next_reports):
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prev_report = next_reports[i - 1] if i > 0 else None
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expected_syscalls.append((prev_report, select(io.POLL_READ | interface_num)))
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expected_syscalls.append((next_reports[-1], StopIteration()))
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assert_async(reader.areadinto(long_buffer), expected_syscalls)
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assert_eq(long_buffer, message[-start_size:])
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assert_eq(reader.size, 0)
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# one byte read, raises eof
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assert_async(reader.areadinto(onebyte_buffer), [(None, EOFError()), ])
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def test_writer():
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rep_len = 64
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interface_num = 0xdeadbeef
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message_type = 0x87654321
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message_len = 1024
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interface = MockHID(interface_num)
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writer = codec_v1.Writer(interface)
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writer.setheader(message_type, message_len)
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# init header corresponding to the data above
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report_header = bytearray(unhexlify('3f2323432100000400'))
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assert_eq(writer.data, report_header + bytearray(rep_len - len(report_header)))
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# empty write
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start_size = writer.size
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assert_async(writer.awrite(bytearray()), [(None, StopIteration()), ])
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assert_eq(writer.data, report_header + bytearray(rep_len - len(report_header)))
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assert_eq(writer.size, start_size)
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# short write, expected no report
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start_size = writer.size
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short_payload = bytearray(range(4))
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assert_async(writer.awrite(short_payload), [(None, StopIteration()), ])
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assert_eq(writer.size, start_size - len(short_payload))
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assert_eq(writer.data,
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report_header +
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short_payload +
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bytearray(rep_len - len(report_header) - len(short_payload)))
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# aligned write, expected one report
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start_size = writer.size
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aligned_payload = bytearray(range(rep_len - len(report_header) - len(short_payload)))
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assert_async(writer.awrite(aligned_payload), [(None, select(io.POLL_WRITE | interface_num)), (None, StopIteration()), ])
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assert_eq(interface.data, [report_header +
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short_payload +
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aligned_payload +
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bytearray(rep_len - len(report_header) - len(short_payload) - len(aligned_payload)), ])
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assert_eq(writer.size, start_size - len(aligned_payload))
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interface.data.clear()
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# short write, expected no report, but data starts with correct seq and cont marker
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report_header = bytearray(unhexlify('3f'))
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start_size = writer.size
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assert_async(writer.awrite(short_payload), [(None, StopIteration()), ])
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assert_eq(writer.size, start_size - len(short_payload))
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assert_eq(writer.data[:len(report_header) + len(short_payload)],
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report_header + short_payload)
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# long write, expected multiple reports
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start_size = writer.size
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long_payload_head = bytearray(range(rep_len - len(report_header) - len(short_payload)))
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long_payload_rest = bytearray(range(start_size - len(long_payload_head)))
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long_payload = long_payload_head + long_payload_rest
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expected_payloads = [short_payload + long_payload_head] + list(chunks(long_payload_rest, rep_len - len(report_header)))
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expected_reports = [report_header + r for r in expected_payloads]
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expected_reports[-1] += bytearray(bytes(1) * (rep_len - len(expected_reports[-1])))
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# test write
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expected_write_reports = expected_reports[:-1]
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assert_async(writer.awrite(long_payload), len(expected_write_reports) * [(None, select(io.POLL_WRITE | interface_num))] + [(None, StopIteration())])
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assert_eq(interface.data, expected_write_reports)
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assert_eq(writer.size, start_size - len(long_payload))
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interface.data.clear()
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# test write raises eof
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assert_async(writer.awrite(bytearray(1)), [(None, EOFError())])
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assert_eq(interface.data, [])
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# test close
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expected_close_reports = expected_reports[-1:]
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assert_async(writer.aclose(), len(expected_close_reports) * [(None, select(io.POLL_WRITE | interface_num))] + [(None, StopIteration())])
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assert_eq(interface.data, expected_close_reports)
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assert_eq(writer.size, 0)
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if __name__ == '__main__':
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run_tests()
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