device/usb/webusb_descriptors_unittest.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "device/usb/webusb_descriptors.h"
   6 #include "testing/gtest/include/gtest/gtest.h"
   7
   8 namespace device {
   9
  10 namespace {
  11
  12 const uint8_t kExampleBosDescriptor[] = {
  13     // BOS descriptor.
  14     0x05, 0x0F, 0x4C, 0x00, 0x03,
  15
  16     // Container ID descriptor.
  17     0x14, 0x10, 0x04, 0x00, 0x2A, 0xF9, 0xF6, 0xC2, 0x98, 0x10, 0x2B, 0x49,
  18     0x8E, 0x64, 0xFF, 0x01, 0x0C, 0x7F, 0x94, 0xE1,
  19
  20     // WebUSB Platform Capability descriptor.
  21     0x17, 0x10, 0x05, 0x00, 0x38, 0xB6, 0x08, 0x34, 0xA9, 0x09, 0xA0, 0x47,
  22     0x8B, 0xFD, 0xA0, 0x76, 0x88, 0x15, 0xB6, 0x65, 0x00, 0x01, 0x42,
  23
  24     // Microsoft OS 2.0 Platform Capability descriptor.
  25     0x1C, 0x10, 0x05, 0x00, 0xDF, 0x60, 0xDD, 0xD8, 0x89, 0x45, 0xC7, 0x4C,
  26     0x9C, 0xD2, 0x65, 0x9D, 0x9E, 0x64, 0x8A, 0x9F, 0x00, 0x00, 0x03, 0x06,
  27     0x00, 0x00, 0x01, 0x00};
  28
  29 const uint8_t kExampleDescriptorSet[] = {
  30     // Descriptor set header.
  31     0x04, 0x00, 0x9E, 0x00,
  32
  33     // URL descriptor: https://example.com:80
  34     0x18, 0x03, 'h', 't', 't', 'p', 's', ':', '/', '/', 'e', 'x', 'a', 'm', 'p',
  35     'l', 'e', '.', 'c', 'o', 'm', ':', '8', '0',
  36
  37     // Configuration subset header. {
  38     0x05, 0x01, 0x01, 0x6A, 0x00,
  39
  40     //   URL descriptor: https://example.com:81
  41     0x18, 0x03, 'h', 't', 't', 'p', 's', ':', '/', '/', 'e', 'x', 'a', 'm', 'p',
  42     'l', 'e', '.', 'c', 'o', 'm', ':', '8', '1',
  43
  44     //   Function subset header. {
  45     0x05, 0x02, 0x01, 0x35, 0x00,
  46
  47     //     URL descriptor: https://example.com:82
  48     0x18, 0x03, 'h', 't', 't', 'p', 's', ':', '/', '/', 'e', 'x', 'a', 'm', 'p',
  49     'l', 'e', '.', 'c', 'o', 'm', ':', '8', '2',
  50
  51     //     URL descriptor: https://example.com:83
  52     0x18, 0x03, 'h', 't', 't', 'p', 's', ':', '/', '/', 'e', 'x', 'a', 'm', 'p',
  53     'l', 'e', '.', 'c', 'o', 'm', ':', '8', '3',
  54
  55     //   }
  56     //   URL descriptor: https://example.com:84
  57     0x18, 0x03, 'h', 't', 't', 'p', 's', ':', '/', '/', 'e', 'x', 'a', 'm', 'p',
  58     'l', 'e', '.', 'c', 'o', 'm', ':', '8', '4',
  59
  60     // }
  61     // URL descriptor: https://example.com:85
  62     0x18, 0x03, 'h', 't', 't', 'p', 's', ':', '/', '/', 'e', 'x', 'a', 'm', 'p',
  63     'l', 'e', '.', 'c', 'o', 'm', ':', '8', '5',
  64 };
  65
  66 const uint8_t kExampleUrlDescriptor[] = {
  67     0x18, 0x03, 'h', 't', 't', 'p', 's', ':', '/', '/', 'e', 'x',
  68     'a',  'm',  'p', 'l', 'e', '.', 'c', 'o', 'm', ':', '8', '0'};
  69
  70 class WebUsbDescriptorsTest : public ::testing::Test {};
  71
  72 TEST_F(WebUsbDescriptorsTest, PlatformCapabilityDescriptor) {
  73   WebUsbPlatformCapabilityDescriptor descriptor;
  74
  75   ASSERT_TRUE(descriptor.ParseFromBosDescriptor(std::vector<uint8_t>(
  76       kExampleBosDescriptor,
  77       kExampleBosDescriptor + sizeof(kExampleBosDescriptor))));
  78   EXPECT_EQ(0x0100, descriptor.version);
  79   EXPECT_EQ(0x42, descriptor.vendor_code);
  80 }
  81
  82 TEST_F(WebUsbDescriptorsTest, ShortBosDescriptorHeader) {
  83   // This BOS descriptor is just too short.
  84   static const uint8_t kBuffer[] = {0x03, 0x0F, 0x03};
  85
  86   WebUsbPlatformCapabilityDescriptor descriptor;
  87   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
  88       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
  89 }
  90
  91 TEST_F(WebUsbDescriptorsTest, LongBosDescriptorHeader) {
  92   // BOS descriptor's bLength is too large.
  93   static const uint8_t kBuffer[] = {0x06, 0x0F, 0x05, 0x00, 0x01};
  94
  95   WebUsbPlatformCapabilityDescriptor descriptor;
  96   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
  97       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
  98 }
  99
 100 TEST_F(WebUsbDescriptorsTest, InvalidBosDescriptor) {
 101   WebUsbPlatformCapabilityDescriptor descriptor;
 102   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(std::vector<uint8_t>(
 103       kExampleUrlDescriptor,
 104       kExampleUrlDescriptor + sizeof(kExampleUrlDescriptor))));
 105 }
 106
 107 TEST_F(WebUsbDescriptorsTest, ShortBosDescriptor) {
 108   // wTotalLength is less than bLength. bNumDeviceCaps == 1 to expose buffer
 109   // length checking bugs.
 110   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x04, 0x00, 0x01};
 111
 112   WebUsbPlatformCapabilityDescriptor descriptor;
 113   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 114       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 115 }
 116
 117 TEST_F(WebUsbDescriptorsTest, LongBosDescriptor) {
 118   // wTotalLength is too large. bNumDeviceCaps == 1 to expose buffer
 119   // length checking bugs.
 120   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x06, 0x00, 0x01};
 121
 122   WebUsbPlatformCapabilityDescriptor descriptor;
 123   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 124       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 125 }
 126
 127 TEST_F(WebUsbDescriptorsTest, UnexpectedlyEmptyBosDescriptor) {
 128   // bNumDeviceCaps == 1 but there are no actual descriptors.
 129   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x05, 0x00, 0x01};
 130   WebUsbPlatformCapabilityDescriptor descriptor;
 131   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 132       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 133 }
 134
 135 TEST_F(WebUsbDescriptorsTest, ShortCapabilityDescriptor) {
 136   // The single capability descriptor in the BOS descriptor is too short.
 137   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x06, 0x00, 0x01, 0x02, 0x10};
 138   WebUsbPlatformCapabilityDescriptor descriptor;
 139   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 140       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 141 }
 142
 143 TEST_F(WebUsbDescriptorsTest, LongCapabilityDescriptor) {
 144   // The bLength on a capability descriptor in the BOS descriptor is longer than
 145   // the remaining space defined by wTotalLength.
 146   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x08, 0x00,
 147                                     0x01, 0x04, 0x10, 0x05};
 148   WebUsbPlatformCapabilityDescriptor descriptor;
 149   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 150       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 151 }
 152
 153 TEST_F(WebUsbDescriptorsTest, NotACapabilityDescriptor) {
 154   // There is something other than a device capability descriptor in the BOS
 155   // descriptor.
 156   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x08, 0x00,
 157                                     0x01, 0x03, 0x0F, 0x05};
 158   WebUsbPlatformCapabilityDescriptor descriptor;
 159   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 160       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 161 }
 162
 163 TEST_F(WebUsbDescriptorsTest, NoPlatformCapabilityDescriptor) {
 164   // The BOS descriptor only contains a Container ID descriptor.
 165   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x19, 0x00, 0x01, 0x14, 0x10,
 166                                     0x04, 0x00, 0x2A, 0xF9, 0xF6, 0xC2, 0x98,
 167                                     0x10, 0x2B, 0x49, 0x8E, 0x64, 0xFF, 0x01,
 168                                     0x0C, 0x7F, 0x94, 0xE1};
 169   WebUsbPlatformCapabilityDescriptor descriptor;
 170   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 171       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 172 }
 173
 174 TEST_F(WebUsbDescriptorsTest, ShortPlatformCapabilityDescriptor) {
 175   // The platform capability descriptor is too short to contain a UUID.
 176   static const uint8_t kBuffer[] = {
 177       0x05, 0x0F, 0x18, 0x00, 0x01, 0x13, 0x10, 0x05, 0x00, 0x2A, 0xF9, 0xF6,
 178       0xC2, 0x98, 0x10, 0x2B, 0x49, 0x8E, 0x64, 0xFF, 0x01, 0x0C, 0x7F, 0x94};
 179   WebUsbPlatformCapabilityDescriptor descriptor;
 180   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 181       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 182 }
 183
 184 TEST_F(WebUsbDescriptorsTest, NoWebUsbCapabilityDescriptor) {
 185   // The BOS descriptor only contains another kind of platform capability
 186   // descriptor.
 187   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x19, 0x00, 0x01, 0x14, 0x10,
 188                                     0x05, 0x00, 0x2A, 0xF9, 0xF6, 0xC2, 0x98,
 189                                     0x10, 0x2B, 0x49, 0x8E, 0x64, 0xFF, 0x01,
 190                                     0x0C, 0x7F, 0x94, 0xE1};
 191   WebUsbPlatformCapabilityDescriptor descriptor;
 192   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 193       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 194 }
 195
 196 TEST_F(WebUsbDescriptorsTest, ShortWebUsbPlatformCapabilityDescriptor) {
 197   // The WebUSB Platform Capability Descriptor is too short.
 198   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x19, 0x00, 0x01, 0x14, 0x10,
 199                                     0x05, 0x00, 0x38, 0xB6, 0x08, 0x34, 0xA9,
 200                                     0x09, 0xA0, 0x47, 0x8B, 0xFD, 0xA0, 0x76,
 201                                     0x88, 0x15, 0xB6, 0x65};
 202   WebUsbPlatformCapabilityDescriptor descriptor;
 203   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 204       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 205 }
 206
 207 TEST_F(WebUsbDescriptorsTest, WebUsbPlatformCapabilityDescriptorOutOfDate) {
 208   // The WebUSB Platform Capability Descriptor is version 0.9 (too old).
 209   static const uint8_t kBuffer[] = {0x05, 0x0F, 0x1C, 0x00, 0x01, 0x17, 0x10,
 210                                     0x05, 0x00, 0x38, 0xB6, 0x08, 0x34, 0xA9,
 211                                     0x09, 0xA0, 0x47, 0x8B, 0xFD, 0xA0, 0x76,
 212                                     0x88, 0x15, 0xB6, 0x65, 0x90, 0x00, 0x01};
 213   WebUsbPlatformCapabilityDescriptor descriptor;
 214   ASSERT_FALSE(descriptor.ParseFromBosDescriptor(
 215       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 216 }
 217
 218 TEST_F(WebUsbDescriptorsTest, DescriptorSet) {
 219   WebUsbDescriptorSet descriptor;
 220
 221   ASSERT_TRUE(descriptor.Parse(std::vector<uint8_t>(
 222       kExampleDescriptorSet,
 223       kExampleDescriptorSet + sizeof(kExampleDescriptorSet))));
 224   EXPECT_EQ(2u, descriptor.origins.size());
 225   EXPECT_EQ(GURL("https://example.com:80"), descriptor.origins[0]);
 226   EXPECT_EQ(GURL("https://example.com:85"), descriptor.origins[1]);
 227   EXPECT_EQ(1u, descriptor.configurations.size());
 228
 229   const WebUsbConfigurationSubset& config1 = descriptor.configurations[0];
 230   EXPECT_EQ(2u, config1.origins.size());
 231   EXPECT_EQ(GURL("https://example.com:81"), config1.origins[0]);
 232   EXPECT_EQ(GURL("https://example.com:84"), config1.origins[1]);
 233   EXPECT_EQ(1u, config1.functions.size());
 234
 235   const WebUsbFunctionSubset& function1 = config1.functions[0];
 236   EXPECT_EQ(2u, function1.origins.size());
 237   EXPECT_EQ(GURL("https://example.com:82"), function1.origins[0]);
 238   EXPECT_EQ(GURL("https://example.com:83"), function1.origins[1]);
 239 }
 240
 241 TEST_F(WebUsbDescriptorsTest, ShortDescriptorSetHeader) {
 242   // bLength is too short for a WebUSB Descriptor Set Header.
 243   static const uint8_t kBuffer[] = {0x03, 0x00, 0x03};
 244   WebUsbDescriptorSet descriptor;
 245   ASSERT_FALSE(descriptor.Parse(
 246       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 247 }
 248
 249 TEST_F(WebUsbDescriptorsTest, LongDescriptorSetHeader) {
 250   // bLength is too long for a WebUSB DescriptorSet Header.
 251   static const uint8_t kBuffer[] = {0x05, 0x00, 0x04, 0x00};
 252   WebUsbDescriptorSet descriptor;
 253   ASSERT_FALSE(descriptor.Parse(
 254       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 255 }
 256
 257 TEST_F(WebUsbDescriptorsTest, UrlNotDescriptorSet) {
 258   WebUsbDescriptorSet descriptor;
 259   ASSERT_FALSE(descriptor.Parse(std::vector<uint8_t>(
 260       kExampleUrlDescriptor,
 261       kExampleUrlDescriptor + sizeof(kExampleUrlDescriptor))));
 262 }
 263
 264 TEST_F(WebUsbDescriptorsTest, ShortDescriptorSet) {
 265   // wTotalLength is shorter than bLength, making the WebUSB Descriptor Set
 266   // Header inconsistent.
 267   static const uint8_t kBuffer[] = {0x04, 0x00, 0x03, 0x00};
 268   WebUsbDescriptorSet descriptor;
 269   ASSERT_FALSE(descriptor.Parse(
 270       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 271 }
 272
 273 TEST_F(WebUsbDescriptorsTest, LongDescriptorSet) {
 274   // The WebUSB Descriptor Set Header's wTotalLength is longer than the buffer.
 275   static const uint8_t kBuffer[] = {0x04, 0x00, 0x05, 0x00};
 276   WebUsbDescriptorSet descriptor;
 277   ASSERT_FALSE(descriptor.Parse(
 278       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 279 }
 280
 281 TEST_F(WebUsbDescriptorsTest, ShortDescriptorInDescriptorSet) {
 282   // bLength for the descriptor within the descriptor set is too short.
 283   static const uint8_t kBuffer[] = {0x04, 0x00, 0x05, 0x00, 0x01};
 284   WebUsbDescriptorSet descriptor;
 285   ASSERT_FALSE(descriptor.Parse(
 286       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 287 }
 288
 289 TEST_F(WebUsbDescriptorsTest, LongDescriptorInDescriptorSet) {
 290   // bLength for the descriptor within the descriptor set is longer than the
 291   // remaining portion of the buffer and the wTotalLength of the descriptor set.
 292   static const uint8_t kBuffer[] = {0x04, 0x00, 0x06, 0x00, 0x03, 0x03};
 293   WebUsbDescriptorSet descriptor;
 294   ASSERT_FALSE(descriptor.Parse(
 295       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 296 }
 297
 298 TEST_F(WebUsbDescriptorsTest, InvalidDescriptorInDescriptorSet) {
 299   // A descriptor set cannot contain a descriptor with this bDescriptorType.
 300   static const uint8_t kBuffer[] = {0x04, 0x00, 0x06, 0x00, 0x02, 0x04};
 301   WebUsbDescriptorSet descriptor;
 302   ASSERT_FALSE(descriptor.Parse(
 303       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 304 }
 305
 306 TEST_F(WebUsbDescriptorsTest, EmptyUrlInDescriptorSet) {
 307   // The URL in this descriptor set is the empty string.
 308   static const uint8_t kBuffer[] = {0x04, 0x00, 0x06, 0x00, 0x02, 0x03};
 309   WebUsbDescriptorSet descriptor;
 310   ASSERT_FALSE(descriptor.Parse(
 311       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 312 }
 313
 314 TEST_F(WebUsbDescriptorsTest, InvalidUrlInDescriptorSet) {
 315   // The URL in this descriptor set is not a valid URL: "This is not a URL."
 316   static const uint8_t kBuffer[] = {
 317       0x04, 0x00, 0x18, 0x00, 0x14, 0x03, 'T', 'h', 'i', 's', ' ', 'i',
 318       's',  ' ',  'n',  'o',  't',  ' ',  'a', ' ', 'U', 'R', 'L', '.'};
 319   WebUsbDescriptorSet descriptor;
 320   ASSERT_FALSE(descriptor.Parse(
 321       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 322 }
 323
 324 TEST_F(WebUsbDescriptorsTest, ShortConfigurationSubsetHeader) {
 325   // bLength is too short for a WebUSB Configuration Subset Header.
 326   static const uint8_t kBuffer[] = {0x04, 0x00, 0x05, 0x00, 0x02, 0x01};
 327   WebUsbDescriptorSet descriptor;
 328   ASSERT_FALSE(descriptor.Parse(
 329       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 330 }
 331
 332 TEST_F(WebUsbDescriptorsTest, ShortConfigurationSubset) {
 333   // The configuration subset header's wTotalLength is shorter than its bLength,
 334   // making it inconsistent.
 335   static const uint8_t kBuffer[] = {0x04, 0x00, 0x09, 0x00, 0x05,
 336                                     0x01, 0x01, 0x04, 0x00};
 337   WebUsbDescriptorSet descriptor;
 338   ASSERT_FALSE(descriptor.Parse(
 339       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 340 }
 341
 342 TEST_F(WebUsbDescriptorsTest, LongConfigurationSubset) {
 343   // wTotalLength of the configuration subset header extends beyond wTotalLength
 344   // for the descriptor set and the length of the buffer.
 345   static const uint8_t kBuffer[] = {0x04, 0x00, 0x09, 0x00, 0x05,
 346                                     0x01, 0x01, 0x06, 0x00};
 347   WebUsbDescriptorSet descriptor;
 348   ASSERT_FALSE(descriptor.Parse(
 349       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 350 }
 351
 352 TEST_F(WebUsbDescriptorsTest, ShortDescriptorInConfigurationSubset) {
 353   // bLength for the descriptor within the configuration subset is too short.
 354   static const uint8_t kBuffer[] = {0x04, 0x00, 0x0A, 0x00, 0x05,
 355                                     0x01, 0x01, 0x06, 0x00, 0x01};
 356   WebUsbDescriptorSet descriptor;
 357   ASSERT_FALSE(descriptor.Parse(
 358       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 359 }
 360
 361 TEST_F(WebUsbDescriptorsTest, LongDescriptorInConfigurationSubset) {
 362   // bLength for the descriptor within the configuration subset is longer than
 363   // the remaining portion of the buffer and the wTotalLength of the
 364   // configuration subset.
 365   static const uint8_t kBuffer[] = {0x04, 0x00, 0x0B, 0x00, 0x05, 0x01,
 366                                     0x01, 0x07, 0x00, 0x03, 0x03};
 367   WebUsbDescriptorSet descriptor;
 368   ASSERT_FALSE(descriptor.Parse(
 369       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 370 }
 371
 372 TEST_F(WebUsbDescriptorsTest, InvalidDescriptorInConfigurationSubset) {
 373   // A configuration subset cannot contain a descriptor with this
 374   // bDescriptorType.
 375   static const uint8_t kBuffer[] = {0x04, 0x00, 0x0B, 0x00, 0x05, 0x01,
 376                                     0x01, 0x07, 0x00, 0x02, 0x01};
 377   WebUsbDescriptorSet descriptor;
 378   ASSERT_FALSE(descriptor.Parse(
 379       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 380 }
 381
 382 TEST_F(WebUsbDescriptorsTest, ShortFunctionSubsetHeader) {
 383   // bLength is too short for a WebUSB Function Subset Header.
 384   static const uint8_t kBuffer[] = {0x04, 0x00, 0x0B, 0x00, 0x05, 0x01,
 385                                     0x01, 0x07, 0x00, 0x02, 0x02};
 386   WebUsbDescriptorSet descriptor;
 387   ASSERT_FALSE(descriptor.Parse(
 388       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 389 }
 390
 391 TEST_F(WebUsbDescriptorsTest, ShortFunctionSubset) {
 392   // The function subset header's wTotalLength is shorter than its bLength,
 393   // making it inconsistent.
 394   static const uint8_t kBuffer[] = {0x04, 0x00, 0x0E, 0x00, 0x05, 0x01, 0x01,
 395                                     0x0A, 0x00, 0x05, 0x02, 0x01, 0x04, 0x00};
 396   WebUsbDescriptorSet descriptor;
 397   ASSERT_FALSE(descriptor.Parse(
 398       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 399 }
 400
 401 TEST_F(WebUsbDescriptorsTest, LongFunctionSubset) {
 402   // wTotalLength of the function subset header extends beyond wTotalLength for
 403   // for the configuration subset and the length of the buffer.
 404   static const uint8_t kBuffer[] = {0x04, 0x00, 0x0E, 0x00, 0x05, 0x01, 0x01,
 405                                     0x0A, 0x00, 0x05, 0x02, 0x01, 0x06, 0x00};
 406   WebUsbDescriptorSet descriptor;
 407   ASSERT_FALSE(descriptor.Parse(
 408       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 409 }
 410
 411 TEST_F(WebUsbDescriptorsTest, ShortDescriptorInFunctionSubset) {
 412   // bLength for the descriptor within the function subset is too short.
 413   static const uint8_t kBuffer[] = {0x04, 0x00, 0x0F, 0x00, 0x05,
 414                                     0x01, 0x01, 0x0B, 0x00, 0x05,
 415                                     0x02, 0x01, 0x06, 0x00, 0x01};
 416   WebUsbDescriptorSet descriptor;
 417   ASSERT_FALSE(descriptor.Parse(
 418       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 419 }
 420
 421 TEST_F(WebUsbDescriptorsTest, LongDescriptorInFunctionSubset) {
 422   // bLength for the descriptor within the function subset is longer than the
 423   // remaining portion of the buffer and the wTotalLength of the function
 424   // subset.
 425   static const uint8_t kBuffer[] = {0x04, 0x00, 0x10, 0x00, 0x05, 0x01,
 426                                     0x01, 0x0C, 0x00, 0x05, 0x02, 0x01,
 427                                     0x07, 0x00, 0x03, 0x03};
 428   WebUsbDescriptorSet descriptor;
 429   ASSERT_FALSE(descriptor.Parse(
 430       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 431 }
 432
 433 TEST_F(WebUsbDescriptorsTest, InvalidDescriptorInFunctionSubset) {
 434   // A function subset cannot contain a descriptor with this bDescriptorType.
 435   static const uint8_t kBuffer[] = {0x04, 0x00, 0x10, 0x00, 0x05, 0x01,
 436                                     0x01, 0x0C, 0x00, 0x05, 0x02, 0x01,
 437                                     0x07, 0x00, 0x02, 0x02};
 438   WebUsbDescriptorSet descriptor;
 439   ASSERT_FALSE(descriptor.Parse(
 440       std::vector<uint8_t>(kBuffer, kBuffer + sizeof(kBuffer))));
 441 }
 442
 443 }  // namespace
 444
 445 }  // namespace device