mirror of https://github.com/Yubico/python-fido2
125 lines
4.4 KiB
Python
125 lines
4.4 KiB
Python
# Copyright 2016 Google Inc. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Tests for pyu2f.hid.linux."""
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import base64
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import os
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import sys
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import mock
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import six
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from six.moves import builtins
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from fido_host.pyu2f import linux
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try:
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from pyfakefs import fake_filesystem # pylint: disable=g-import-not-at-top
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except ImportError:
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from fakefs import fake_filesystem # pylint: disable=g-import-not-at-top
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if sys.version_info[:2] < (2, 7):
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import unittest2 as unittest # pylint: disable=g-import-not-at-top
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else:
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import unittest # pylint: disable=g-import-not-at-top
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# These are base64 encoded report descriptors of a Yubico token
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# and a Logitech keyboard.
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YUBICO_RD = 'BtDxCQGhAQkgFQAm/wB1CJVAgQIJIRUAJv8AdQiVQJECwA=='
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KEYBOARD_RD = (
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'BQEJAqEBCQGhAAUJGQEpBRUAJQGVBXUBgQKVAXUDgQEFAQkwCTEJOBWBJX91CJUDgQbAwA==')
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def AddDevice(fs, dev_name, product_name,
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vendor_id, product_id, report_descriptor_b64):
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uevent = fs.CreateFile('/sys/class/hidraw/%s/device/uevent' % dev_name)
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rd = fs.CreateFile('/sys/class/hidraw/%s/device/report_descriptor' % dev_name)
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report_descriptor = base64.b64decode(report_descriptor_b64)
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rd.SetContents(report_descriptor)
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buf = 'HID_NAME=%s\n' % product_name.encode('utf8')
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buf += 'HID_ID=0001:%08X:%08X\n' % (vendor_id, product_id)
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uevent.SetContents(buf)
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class FakeDeviceOsModule(object):
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O_RDWR = os.O_RDWR
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path = os.path
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data_written = None
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data_to_return = None
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def open(self, unused_path, unused_opts): # pylint: disable=invalid-name
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return 0
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def write(self, unused_dev, data): # pylint: disable=invalid-name
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self.data_written = data
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def read(self, unused_dev, unused_length): # pylint: disable=invalid-name
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return self.data_to_return
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class LinuxTest(unittest.TestCase):
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def setUp(self):
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self.fs = fake_filesystem.FakeFilesystem()
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self.fs.CreateDirectory('/sys/class/hidraw')
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def tearDown(self):
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self.fs.RemoveObject('/sys/class/hidraw')
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def testCallEnumerate(self):
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AddDevice(self.fs, 'hidraw1', 'Logitech USB Keyboard',
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0x046d, 0xc31c, KEYBOARD_RD)
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AddDevice(self.fs, 'hidraw2', 'Yubico U2F', 0x1050, 0x0407, YUBICO_RD)
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with mock.patch.object(linux, 'os', fake_filesystem.FakeOsModule(self.fs)):
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fake_open = fake_filesystem.FakeFileOpen(self.fs)
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with mock.patch.object(builtins, 'open', fake_open):
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devs = list(linux.LinuxHidDevice.Enumerate())
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devs = sorted(devs, key=lambda k: k['vendor_id'])
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self.assertEqual(len(devs), 2)
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self.assertEqual(devs[0]['vendor_id'], 0x046d)
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self.assertEqual(devs[0]['product_id'], 0x0c31c)
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self.assertEqual(devs[1]['vendor_id'], 0x1050)
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self.assertEqual(devs[1]['product_id'], 0x0407)
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self.assertEqual(devs[1]['usage_page'], 0xf1d0)
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self.assertEqual(devs[1]['usage'], 1)
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def testCallOpen(self):
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AddDevice(self.fs, 'hidraw1', 'Yubico U2F', 0x1050, 0x0407, YUBICO_RD)
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fake_open = fake_filesystem.FakeFileOpen(self.fs)
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# The open() builtin is used to read from the fake sysfs
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with mock.patch.object(builtins, 'open', fake_open):
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# The os.open function is used to interact with the low
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# level device. We don't want to use fakefs for that.
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fake_dev_os = FakeDeviceOsModule()
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with mock.patch.object(linux, 'os', fake_dev_os):
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dev = linux.LinuxHidDevice('/dev/hidraw1')
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self.assertEqual(dev.GetInReportDataLength(), 64)
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self.assertEqual(dev.GetOutReportDataLength(), 64)
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dev.Write(list(range(0, 64)))
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# The HidDevice implementation prepends a zero-byte representing the
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# report ID
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self.assertEqual(list(six.iterbytes(fake_dev_os.data_written)),
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[0] + list(range(0, 64)))
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fake_dev_os.data_to_return = b'x' * 64
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self.assertEqual(dev.Read(), [120] * 64) # chr(120) = 'x'
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if __name__ == '__main__':
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unittest.main()
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