tools/crypto/ccp/test_dbc.py

   1 #!/usr/bin/python3
   2 # SPDX-License-Identifier: GPL-2.0
   3 import unittest
   4 import os
   5 import time
   6 import glob
   7 import fcntl
   8 try:
   9     import ioctl_opt as ioctl
  10 except ImportError:
  11     ioctl = None
  12     pass
  13 from dbc import *
  14
  15 # Artificial delay between set commands
  16 SET_DELAY = 0.5
  17
  18
  19 class invalid_param(ctypes.Structure):
  20     _fields_ = [
  21         ("data", ctypes.c_uint8),
  22     ]
  23
  24
  25 def system_is_secured() -> bool:
  26     fused_part = glob.glob("/sys/bus/pci/drivers/ccp/**/fused_part")[0]
  27     if os.path.exists(fused_part):
  28         with open(fused_part, "r") as r:
  29             return int(r.read()) == 1
  30     return True
  31
  32
  33 class DynamicBoostControlTest(unittest.TestCase):
  34     def __init__(self, data) -> None:
  35         self.d = None
  36         self.signature = b"FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
  37         self.uid = b"1111111111111111"
  38         super().__init__(data)
  39
  40     def setUp(self) -> None:
  41         self.d = open(DEVICE_NODE)
  42         return super().setUp()
  43
  44     def tearDown(self) -> None:
  45         if self.d:
  46             self.d.close()
  47         return super().tearDown()
  48
  49
  50 class TestUnsupportedSystem(DynamicBoostControlTest):
  51     def setUp(self) -> None:
  52         if os.path.exists(DEVICE_NODE):
  53             self.skipTest("system is supported")
  54         with self.assertRaises(FileNotFoundError) as error:
  55             super().setUp()
  56         self.assertEqual(error.exception.errno, 2)
  57
  58     def test_unauthenticated_nonce(self) -> None:
  59         """fetch unauthenticated nonce"""
  60         with self.assertRaises(ValueError) as error:
  61             get_nonce(self.d, None)
  62
  63
  64 class TestInvalidIoctls(DynamicBoostControlTest):
  65     def __init__(self, data) -> None:
  66         self.data = invalid_param()
  67         self.data.data = 1
  68         super().__init__(data)
  69
  70     def setUp(self) -> None:
  71         if not os.path.exists(DEVICE_NODE):
  72             self.skipTest("system is unsupported")
  73         if not ioctl:
  74             self.skipTest("unable to test IOCTLs without ioctl_opt")
  75
  76         return super().setUp()
  77
  78     def test_invalid_nonce_ioctl(self) -> None:
  79         """tries to call get_nonce ioctl with invalid data structures"""
  80
  81         # 0x1 (get nonce), and invalid data
  82         INVALID1 = ioctl.IOWR(ord("D"), 0x01, invalid_param)
  83         with self.assertRaises(OSError) as error:
  84             fcntl.ioctl(self.d, INVALID1, self.data, True)
  85         self.assertEqual(error.exception.errno, 22)
  86
  87     def test_invalid_setuid_ioctl(self) -> None:
  88         """tries to call set_uid ioctl with invalid data structures"""
  89
  90         # 0x2 (set uid), and invalid data
  91         INVALID2 = ioctl.IOW(ord("D"), 0x02, invalid_param)
  92         with self.assertRaises(OSError) as error:
  93             fcntl.ioctl(self.d, INVALID2, self.data, True)
  94         self.assertEqual(error.exception.errno, 22)
  95
  96     def test_invalid_setuid_rw_ioctl(self) -> None:
  97         """tries to call set_uid ioctl with invalid data structures"""
  98
  99         # 0x2 as RW (set uid), and invalid data
 100         INVALID3 = ioctl.IOWR(ord("D"), 0x02, invalid_param)
 101         with self.assertRaises(OSError) as error:
 102             fcntl.ioctl(self.d, INVALID3, self.data, True)
 103         self.assertEqual(error.exception.errno, 22)
 104
 105     def test_invalid_param_ioctl(self) -> None:
 106         """tries to call param ioctl with invalid data structures"""
 107         # 0x3 (param), and invalid data
 108         INVALID4 = ioctl.IOWR(ord("D"), 0x03, invalid_param)
 109         with self.assertRaises(OSError) as error:
 110             fcntl.ioctl(self.d, INVALID4, self.data, True)
 111         self.assertEqual(error.exception.errno, 22)
 112
 113     def test_invalid_call_ioctl(self) -> None:
 114         """tries to call the DBC ioctl with invalid data structures"""
 115         # 0x4, and invalid data
 116         INVALID5 = ioctl.IOWR(ord("D"), 0x04, invalid_param)
 117         with self.assertRaises(OSError) as error:
 118             fcntl.ioctl(self.d, INVALID5, self.data, True)
 119         self.assertEqual(error.exception.errno, 22)
 120
 121
 122 class TestInvalidSignature(DynamicBoostControlTest):
 123     def setUp(self) -> None:
 124         if not os.path.exists(DEVICE_NODE):
 125             self.skipTest("system is unsupported")
 126         if not system_is_secured():
 127             self.skipTest("system is unfused")
 128         return super().setUp()
 129
 130     def test_unauthenticated_nonce(self) -> None:
 131         """fetch unauthenticated nonce"""
 132         get_nonce(self.d, None)
 133
 134     def test_multiple_unauthenticated_nonce(self) -> None:
 135         """ensure state machine always returns nonce"""
 136         for count in range(0, 2):
 137             get_nonce(self.d, None)
 138
 139     def test_authenticated_nonce(self) -> None:
 140         """fetch authenticated nonce"""
 141         get_nonce(self.d, None)
 142         with self.assertRaises(OSError) as error:
 143             get_nonce(self.d, self.signature)
 144         self.assertEqual(error.exception.errno, 22)
 145
 146     def test_set_uid(self) -> None:
 147         """set uid"""
 148         get_nonce(self.d, None)
 149         with self.assertRaises(OSError) as error:
 150             set_uid(self.d, self.uid, self.signature)
 151         self.assertEqual(error.exception.errno, 1)
 152
 153     def test_get_param(self) -> None:
 154         """fetch a parameter"""
 155         with self.assertRaises(OSError) as error:
 156             process_param(self.d, PARAM_GET_SOC_PWR_CUR, self.signature)
 157         self.assertEqual(error.exception.errno, 11)
 158
 159     def test_set_param(self) -> None:
 160         """set a parameter"""
 161         with self.assertRaises(OSError) as error:
 162             process_param(self.d, PARAM_SET_PWR_CAP, self.signature, 1000)
 163         self.assertEqual(error.exception.errno, 11)
 164
 165
 166 class TestUnFusedSystem(DynamicBoostControlTest):
 167     def setup_identity(self) -> None:
 168         """sets up the identity of the caller"""
 169         # if already authenticated these may fail
 170         try:
 171             get_nonce(self.d, None)
 172         except PermissionError:
 173             pass
 174         try:
 175             set_uid(self.d, self.uid, self.signature)
 176         except BlockingIOError:
 177             pass
 178         try:
 179             get_nonce(self.d, self.signature)
 180         except PermissionError:
 181             pass
 182
 183     def setUp(self) -> None:
 184         if not os.path.exists(DEVICE_NODE):
 185             self.skipTest("system is unsupported")
 186         if system_is_secured():
 187             self.skipTest("system is fused")
 188         super().setUp()
 189         self.setup_identity()
 190         time.sleep(SET_DELAY)
 191
 192     def test_get_valid_param(self) -> None:
 193         """fetch all possible parameters"""
 194         # SOC power
 195         soc_power_max = process_param(self.d, PARAM_GET_SOC_PWR_MAX, self.signature)
 196         soc_power_min = process_param(self.d, PARAM_GET_SOC_PWR_MIN, self.signature)
 197         self.assertGreater(soc_power_max[0], soc_power_min[0])
 198
 199         # fmax
 200         fmax_max = process_param(self.d, PARAM_GET_FMAX_MAX, self.signature)
 201         fmax_min = process_param(self.d, PARAM_GET_FMAX_MIN, self.signature)
 202         self.assertGreater(fmax_max[0], fmax_min[0])
 203
 204         # cap values
 205         keys = {
 206             "fmax-cap": PARAM_GET_FMAX_CAP,
 207             "power-cap": PARAM_GET_PWR_CAP,
 208             "current-temp": PARAM_GET_CURR_TEMP,
 209             "soc-power-cur": PARAM_GET_SOC_PWR_CUR,
 210         }
 211         for k in keys:
 212             result = process_param(self.d, keys[k], self.signature)
 213             self.assertGreater(result[0], 0)
 214
 215     def test_get_invalid_param(self) -> None:
 216         """fetch an invalid parameter"""
 217         try:
 218             set_uid(self.d, self.uid, self.signature)
 219         except OSError:
 220             pass
 221         with self.assertRaises(OSError) as error:
 222             process_param(self.d, (0xF,), self.signature)
 223         self.assertEqual(error.exception.errno, 22)
 224
 225     def test_set_fmax(self) -> None:
 226         """get/set fmax limit"""
 227         # fetch current
 228         original = process_param(self.d, PARAM_GET_FMAX_CAP, self.signature)
 229
 230         # set the fmax
 231         target = original[0] - 100
 232         process_param(self.d, PARAM_SET_FMAX_CAP, self.signature, target)
 233         time.sleep(SET_DELAY)
 234         new = process_param(self.d, PARAM_GET_FMAX_CAP, self.signature)
 235         self.assertEqual(new[0], target)
 236
 237         # revert back to current
 238         process_param(self.d, PARAM_SET_FMAX_CAP, self.signature, original[0])
 239         time.sleep(SET_DELAY)
 240         cur = process_param(self.d, PARAM_GET_FMAX_CAP, self.signature)
 241         self.assertEqual(cur[0], original[0])
 242
 243     def test_set_power_cap(self) -> None:
 244         """get/set power cap limit"""
 245         # fetch current
 246         original = process_param(self.d, PARAM_GET_PWR_CAP, self.signature)
 247
 248         # set the fmax
 249         target = original[0] - 10
 250         process_param(self.d, PARAM_SET_PWR_CAP, self.signature, target)
 251         time.sleep(SET_DELAY)
 252         new = process_param(self.d, PARAM_GET_PWR_CAP, self.signature)
 253         self.assertEqual(new[0], target)
 254
 255         # revert back to current
 256         process_param(self.d, PARAM_SET_PWR_CAP, self.signature, original[0])
 257         time.sleep(SET_DELAY)
 258         cur = process_param(self.d, PARAM_GET_PWR_CAP, self.signature)
 259         self.assertEqual(cur[0], original[0])
 260
 261     def test_set_3d_graphics_mode(self) -> None:
 262         """set/get 3d graphics mode"""
 263         # these aren't currently implemented but may be some day
 264         # they are *expected* to fail
 265         with self.assertRaises(OSError) as error:
 266             process_param(self.d, PARAM_GET_GFX_MODE, self.signature)
 267         self.assertEqual(error.exception.errno, 2)
 268
 269         time.sleep(SET_DELAY)
 270
 271         with self.assertRaises(OSError) as error:
 272             process_param(self.d, PARAM_SET_GFX_MODE, self.signature, 1)
 273         self.assertEqual(error.exception.errno, 2)
 274
 275
 276 if __name__ == "__main__":
 277     unittest.main()