content/child/webcrypto/test/aes_kw_unittest.cc

   1 // Copyright 2014 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 "base/stl_util.h"
   6 #include "content/child/webcrypto/algorithm_dispatch.h"
   7 #include "content/child/webcrypto/crypto_data.h"
   8 #include "content/child/webcrypto/status.h"
   9 #include "content/child/webcrypto/test/test_helpers.h"
  10 #include "content/child/webcrypto/webcrypto_util.h"
  11 #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h"
  12 #include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h"
  13
  14 namespace content {
  15
  16 namespace webcrypto {
  17
  18 namespace {
  19
  20 blink::WebCryptoAlgorithm CreateAesKwKeyGenAlgorithm(
  21     unsigned short key_length_bits) {
  22   return CreateAesKeyGenAlgorithm(blink::WebCryptoAlgorithmIdAesKw,
  23                                   key_length_bits);
  24 }
  25
  26 TEST(WebCryptoAesKwTest, GenerateKeyBadLength) {
  27   const unsigned short kKeyLen[] = {0, 127, 257};
  28   blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
  29   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(kKeyLen); ++i) {
  30     SCOPED_TRACE(i);
  31     EXPECT_EQ(Status::ErrorGenerateKeyLength(),
  32               GenerateSecretKey(
  33                   CreateAesKwKeyGenAlgorithm(kKeyLen[i]), true, 0, &key));
  34   }
  35 }
  36
  37 TEST(WebCryptoAesKwTest, ImportKeyJwkKeyOpsWrapUnwrap) {
  38   blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
  39   base::DictionaryValue dict;
  40   dict.SetString("kty", "oct");
  41   dict.SetString("k", "GADWrMRHwQfoNaXU5fZvTg==");
  42   base::ListValue* key_ops = new base::ListValue;
  43   dict.Set("key_ops", key_ops);  // Takes ownership.
  44
  45   key_ops->AppendString("wrapKey");
  46
  47   EXPECT_EQ(
  48       Status::Success(),
  49       ImportKeyJwkFromDict(dict,
  50                            CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw),
  51                            false,
  52                            blink::WebCryptoKeyUsageWrapKey,
  53                            &key));
  54
  55   EXPECT_EQ(blink::WebCryptoKeyUsageWrapKey, key.usages());
  56
  57   key_ops->AppendString("unwrapKey");
  58
  59   EXPECT_EQ(
  60       Status::Success(),
  61       ImportKeyJwkFromDict(dict,
  62                            CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw),
  63                            false,
  64                            blink::WebCryptoKeyUsageUnwrapKey,
  65                            &key));
  66
  67   EXPECT_EQ(blink::WebCryptoKeyUsageUnwrapKey, key.usages());
  68 }
  69
  70 TEST(WebCryptoAesKwTest, ImportExportJwk) {
  71   const blink::WebCryptoAlgorithm algorithm =
  72       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
  73
  74   // AES-KW 128
  75   ImportExportJwkSymmetricKey(
  76       128,
  77       algorithm,
  78       blink::WebCryptoKeyUsageWrapKey | blink::WebCryptoKeyUsageUnwrapKey,
  79       "A128KW");
  80
  81   // AES-KW 256
  82   ImportExportJwkSymmetricKey(
  83       256,
  84       algorithm,
  85       blink::WebCryptoKeyUsageWrapKey | blink::WebCryptoKeyUsageUnwrapKey,
  86       "A256KW");
  87 }
  88
  89 TEST(WebCryptoAesKwTest, AesKwKeyImport) {
  90   blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
  91   blink::WebCryptoAlgorithm algorithm =
  92       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
  93
  94   // Import a 128-bit Key Encryption Key (KEK)
  95   std::string key_raw_hex_in = "025a8cf3f08b4f6c5f33bbc76a471939";
  96   ASSERT_EQ(Status::Success(),
  97             ImportKey(blink::WebCryptoKeyFormatRaw,
  98                       CryptoData(HexStringToBytes(key_raw_hex_in)),
  99                       algorithm,
 100                       true,
 101                       blink::WebCryptoKeyUsageWrapKey,
 102                       &key));
 103   std::vector<uint8_t> key_raw_out;
 104   EXPECT_EQ(Status::Success(),
 105             ExportKey(blink::WebCryptoKeyFormatRaw, key, &key_raw_out));
 106   EXPECT_BYTES_EQ_HEX(key_raw_hex_in, key_raw_out);
 107
 108   // Import a 192-bit KEK
 109   key_raw_hex_in = "c0192c6466b2370decbb62b2cfef4384544ffeb4d2fbc103";
 110   ASSERT_EQ(Status::ErrorAes192BitUnsupported(),
 111             ImportKey(blink::WebCryptoKeyFormatRaw,
 112                       CryptoData(HexStringToBytes(key_raw_hex_in)),
 113                       algorithm,
 114                       true,
 115                       blink::WebCryptoKeyUsageWrapKey,
 116                       &key));
 117
 118   // Import a 256-bit Key Encryption Key (KEK)
 119   key_raw_hex_in =
 120       "e11fe66380d90fa9ebefb74e0478e78f95664d0c67ca20ce4a0b5842863ac46f";
 121   ASSERT_EQ(Status::Success(),
 122             ImportKey(blink::WebCryptoKeyFormatRaw,
 123                       CryptoData(HexStringToBytes(key_raw_hex_in)),
 124                       algorithm,
 125                       true,
 126                       blink::WebCryptoKeyUsageWrapKey,
 127                       &key));
 128   EXPECT_EQ(Status::Success(),
 129             ExportKey(blink::WebCryptoKeyFormatRaw, key, &key_raw_out));
 130   EXPECT_BYTES_EQ_HEX(key_raw_hex_in, key_raw_out);
 131
 132   // Fail import of 0 length key
 133   EXPECT_EQ(Status::ErrorImportAesKeyLength(),
 134             ImportKey(blink::WebCryptoKeyFormatRaw,
 135                       CryptoData(HexStringToBytes("")),
 136                       algorithm,
 137                       true,
 138                       blink::WebCryptoKeyUsageWrapKey,
 139                       &key));
 140
 141   // Fail import of 124-bit KEK
 142   key_raw_hex_in = "3e4566a2bdaa10cb68134fa66c15ddb";
 143   EXPECT_EQ(Status::ErrorImportAesKeyLength(),
 144             ImportKey(blink::WebCryptoKeyFormatRaw,
 145                       CryptoData(HexStringToBytes(key_raw_hex_in)),
 146                       algorithm,
 147                       true,
 148                       blink::WebCryptoKeyUsageWrapKey,
 149                       &key));
 150
 151   // Fail import of 200-bit KEK
 152   key_raw_hex_in = "0a1d88608a5ad9fec64f1ada269ebab4baa2feeb8d95638c0e";
 153   EXPECT_EQ(Status::ErrorImportAesKeyLength(),
 154             ImportKey(blink::WebCryptoKeyFormatRaw,
 155                       CryptoData(HexStringToBytes(key_raw_hex_in)),
 156                       algorithm,
 157                       true,
 158                       blink::WebCryptoKeyUsageWrapKey,
 159                       &key));
 160
 161   // Fail import of 260-bit KEK
 162   key_raw_hex_in =
 163       "72d4e475ff34215416c9ad9c8281247a4d730c5f275ac23f376e73e3bce8d7d5a";
 164   EXPECT_EQ(Status::ErrorImportAesKeyLength(),
 165             ImportKey(blink::WebCryptoKeyFormatRaw,
 166                       CryptoData(HexStringToBytes(key_raw_hex_in)),
 167                       algorithm,
 168                       true,
 169                       blink::WebCryptoKeyUsageWrapKey,
 170                       &key));
 171 }
 172
 173 TEST(WebCryptoAesKwTest, UnwrapFailures) {
 174   // This test exercises the code path common to all unwrap operations.
 175   scoped_ptr<base::ListValue> tests;
 176   ASSERT_TRUE(ReadJsonTestFileToList("aes_kw.json", &tests));
 177   base::DictionaryValue* test;
 178   ASSERT_TRUE(tests->GetDictionary(0, &test));
 179   const std::vector<uint8_t> test_kek = GetBytesFromHexString(test, "kek");
 180   const std::vector<uint8_t> test_ciphertext =
 181       GetBytesFromHexString(test, "ciphertext");
 182
 183   blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull();
 184
 185   // Using a wrapping algorithm that does not match the wrapping key algorithm
 186   // should fail.
 187   blink::WebCryptoKey wrapping_key =
 188       ImportSecretKeyFromRaw(test_kek,
 189                              CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw),
 190                              blink::WebCryptoKeyUsageUnwrapKey);
 191   EXPECT_EQ(Status::ErrorUnexpected(),
 192             UnwrapKey(blink::WebCryptoKeyFormatRaw,
 193                       CryptoData(test_ciphertext),
 194                       wrapping_key,
 195                       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesCbc),
 196                       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesCbc),
 197                       true,
 198                       blink::WebCryptoKeyUsageEncrypt,
 199                       &unwrapped_key));
 200 }
 201
 202 TEST(WebCryptoAesKwTest, AesKwRawSymkeyWrapUnwrapKnownAnswer) {
 203   scoped_ptr<base::ListValue> tests;
 204   ASSERT_TRUE(ReadJsonTestFileToList("aes_kw.json", &tests));
 205
 206   for (size_t test_index = 0; test_index < tests->GetSize(); ++test_index) {
 207     SCOPED_TRACE(test_index);
 208     base::DictionaryValue* test;
 209     ASSERT_TRUE(tests->GetDictionary(test_index, &test));
 210     const std::vector<uint8_t> test_kek = GetBytesFromHexString(test, "kek");
 211     const std::vector<uint8_t> test_key = GetBytesFromHexString(test, "key");
 212     const std::vector<uint8_t> test_ciphertext =
 213         GetBytesFromHexString(test, "ciphertext");
 214     const blink::WebCryptoAlgorithm wrapping_algorithm =
 215         CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
 216
 217     // Import the wrapping key.
 218     blink::WebCryptoKey wrapping_key = ImportSecretKeyFromRaw(
 219         test_kek,
 220         wrapping_algorithm,
 221         blink::WebCryptoKeyUsageWrapKey | blink::WebCryptoKeyUsageUnwrapKey);
 222
 223     // Import the key to be wrapped.
 224     blink::WebCryptoKey key = ImportSecretKeyFromRaw(
 225         test_key,
 226         CreateHmacImportAlgorithm(blink::WebCryptoAlgorithmIdSha1),
 227         blink::WebCryptoKeyUsageSign);
 228
 229     // Wrap the key and verify the ciphertext result against the known answer.
 230     std::vector<uint8_t> wrapped_key;
 231     ASSERT_EQ(Status::Success(),
 232               WrapKey(blink::WebCryptoKeyFormatRaw,
 233                       key,
 234                       wrapping_key,
 235                       wrapping_algorithm,
 236                       &wrapped_key));
 237     EXPECT_BYTES_EQ(test_ciphertext, wrapped_key);
 238
 239     // Unwrap the known ciphertext to get a new test_key.
 240     blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull();
 241     ASSERT_EQ(
 242         Status::Success(),
 243         UnwrapKey(blink::WebCryptoKeyFormatRaw,
 244                   CryptoData(test_ciphertext),
 245                   wrapping_key,
 246                   wrapping_algorithm,
 247                   CreateHmacImportAlgorithm(blink::WebCryptoAlgorithmIdSha1),
 248                   true,
 249                   blink::WebCryptoKeyUsageSign,
 250                   &unwrapped_key));
 251     EXPECT_FALSE(key.isNull());
 252     EXPECT_TRUE(key.handle());
 253     EXPECT_EQ(blink::WebCryptoKeyTypeSecret, key.type());
 254     EXPECT_EQ(blink::WebCryptoAlgorithmIdHmac, key.algorithm().id());
 255     EXPECT_EQ(true, key.extractable());
 256     EXPECT_EQ(blink::WebCryptoKeyUsageSign, key.usages());
 257
 258     // Export the new key and compare its raw bytes with the original known key.
 259     std::vector<uint8_t> raw_key;
 260     EXPECT_EQ(Status::Success(),
 261               ExportKey(blink::WebCryptoKeyFormatRaw, unwrapped_key, &raw_key));
 262     EXPECT_BYTES_EQ(test_key, raw_key);
 263   }
 264 }
 265
 266 // Unwrap a HMAC key using AES-KW, and then try doing a sign/verify with the
 267 // unwrapped key
 268 TEST(WebCryptoAesKwTest, AesKwRawSymkeyUnwrapSignVerifyHmac) {
 269   scoped_ptr<base::ListValue> tests;
 270   ASSERT_TRUE(ReadJsonTestFileToList("aes_kw.json", &tests));
 271
 272   base::DictionaryValue* test;
 273   ASSERT_TRUE(tests->GetDictionary(0, &test));
 274   const std::vector<uint8_t> test_kek = GetBytesFromHexString(test, "kek");
 275   const std::vector<uint8_t> test_ciphertext =
 276       GetBytesFromHexString(test, "ciphertext");
 277   const blink::WebCryptoAlgorithm wrapping_algorithm =
 278       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
 279
 280   // Import the wrapping key.
 281   blink::WebCryptoKey wrapping_key = ImportSecretKeyFromRaw(
 282       test_kek, wrapping_algorithm, blink::WebCryptoKeyUsageUnwrapKey);
 283
 284   // Unwrap the known ciphertext.
 285   blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
 286   ASSERT_EQ(
 287       Status::Success(),
 288       UnwrapKey(blink::WebCryptoKeyFormatRaw,
 289                 CryptoData(test_ciphertext),
 290                 wrapping_key,
 291                 wrapping_algorithm,
 292                 CreateHmacImportAlgorithm(blink::WebCryptoAlgorithmIdSha1),
 293                 false,
 294                 blink::WebCryptoKeyUsageSign | blink::WebCryptoKeyUsageVerify,
 295                 &key));
 296
 297   EXPECT_EQ(blink::WebCryptoKeyTypeSecret, key.type());
 298   EXPECT_EQ(blink::WebCryptoAlgorithmIdHmac, key.algorithm().id());
 299   EXPECT_FALSE(key.extractable());
 300   EXPECT_EQ(blink::WebCryptoKeyUsageSign | blink::WebCryptoKeyUsageVerify,
 301             key.usages());
 302
 303   // Sign an empty message and ensure it is verified.
 304   std::vector<uint8_t> test_message;
 305   std::vector<uint8_t> signature;
 306
 307   ASSERT_EQ(Status::Success(),
 308             Sign(CreateAlgorithm(blink::WebCryptoAlgorithmIdHmac),
 309                  key,
 310                  CryptoData(test_message),
 311                  &signature));
 312
 313   EXPECT_GT(signature.size(), 0u);
 314
 315   bool verify_result;
 316   ASSERT_EQ(Status::Success(),
 317             Verify(CreateAlgorithm(blink::WebCryptoAlgorithmIdHmac),
 318                    key,
 319                    CryptoData(signature),
 320                    CryptoData(test_message),
 321                    &verify_result));
 322 }
 323
 324 TEST(WebCryptoAesKwTest, AesKwRawSymkeyWrapUnwrapErrors) {
 325   scoped_ptr<base::ListValue> tests;
 326   ASSERT_TRUE(ReadJsonTestFileToList("aes_kw.json", &tests));
 327   base::DictionaryValue* test;
 328   // Use 256 bits of data with a 256-bit KEK
 329   ASSERT_TRUE(tests->GetDictionary(3, &test));
 330   const std::vector<uint8_t> test_kek = GetBytesFromHexString(test, "kek");
 331   const std::vector<uint8_t> test_key = GetBytesFromHexString(test, "key");
 332   const std::vector<uint8_t> test_ciphertext =
 333       GetBytesFromHexString(test, "ciphertext");
 334   const blink::WebCryptoAlgorithm wrapping_algorithm =
 335       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
 336   const blink::WebCryptoAlgorithm key_algorithm =
 337       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesCbc);
 338   // Import the wrapping key.
 339   blink::WebCryptoKey wrapping_key = ImportSecretKeyFromRaw(
 340       test_kek,
 341       wrapping_algorithm,
 342       blink::WebCryptoKeyUsageWrapKey | blink::WebCryptoKeyUsageUnwrapKey);
 343   // Import the key to be wrapped.
 344   blink::WebCryptoKey key =
 345       ImportSecretKeyFromRaw(test_key,
 346                              CreateAlgorithm(blink::WebCryptoAlgorithmIdAesCbc),
 347                              blink::WebCryptoKeyUsageEncrypt);
 348
 349   // Unwrap with wrapped data too small must fail.
 350   const std::vector<uint8_t> small_data(test_ciphertext.begin(),
 351                                         test_ciphertext.begin() + 23);
 352   blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull();
 353   EXPECT_EQ(Status::ErrorDataTooSmall(),
 354             UnwrapKey(blink::WebCryptoKeyFormatRaw,
 355                       CryptoData(small_data),
 356                       wrapping_key,
 357                       wrapping_algorithm,
 358                       key_algorithm,
 359                       true,
 360                       blink::WebCryptoKeyUsageEncrypt,
 361                       &unwrapped_key));
 362
 363   // Unwrap with wrapped data size not a multiple of 8 bytes must fail.
 364   const std::vector<uint8_t> unaligned_data(test_ciphertext.begin(),
 365                                             test_ciphertext.end() - 2);
 366   EXPECT_EQ(Status::ErrorInvalidAesKwDataLength(),
 367             UnwrapKey(blink::WebCryptoKeyFormatRaw,
 368                       CryptoData(unaligned_data),
 369                       wrapping_key,
 370                       wrapping_algorithm,
 371                       key_algorithm,
 372                       true,
 373                       blink::WebCryptoKeyUsageEncrypt,
 374                       &unwrapped_key));
 375 }
 376
 377 TEST(WebCryptoAesKwTest, AesKwRawSymkeyUnwrapCorruptData) {
 378   scoped_ptr<base::ListValue> tests;
 379   ASSERT_TRUE(ReadJsonTestFileToList("aes_kw.json", &tests));
 380   base::DictionaryValue* test;
 381   // Use 256 bits of data with a 256-bit KEK
 382   ASSERT_TRUE(tests->GetDictionary(3, &test));
 383   const std::vector<uint8_t> test_kek = GetBytesFromHexString(test, "kek");
 384   const std::vector<uint8_t> test_key = GetBytesFromHexString(test, "key");
 385   const std::vector<uint8_t> test_ciphertext =
 386       GetBytesFromHexString(test, "ciphertext");
 387   const blink::WebCryptoAlgorithm wrapping_algorithm =
 388       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
 389
 390   // Import the wrapping key.
 391   blink::WebCryptoKey wrapping_key = ImportSecretKeyFromRaw(
 392       test_kek,
 393       wrapping_algorithm,
 394       blink::WebCryptoKeyUsageWrapKey | blink::WebCryptoKeyUsageUnwrapKey);
 395
 396   // Unwrap of a corrupted version of the known ciphertext should fail, due to
 397   // AES-KW's built-in integrity check.
 398   blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull();
 399   EXPECT_EQ(Status::OperationError(),
 400             UnwrapKey(blink::WebCryptoKeyFormatRaw,
 401                       CryptoData(Corrupted(test_ciphertext)),
 402                       wrapping_key,
 403                       wrapping_algorithm,
 404                       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesCbc),
 405                       true,
 406                       blink::WebCryptoKeyUsageEncrypt,
 407                       &unwrapped_key));
 408 }
 409
 410 TEST(WebCryptoAesKwTest, AesKwJwkSymkeyUnwrapKnownData) {
 411   // The following data lists a known HMAC SHA-256 key, then a JWK
 412   // representation of this key which was encrypted ("wrapped") using AES-KW and
 413   // the following wrapping key.
 414   // For reference, the intermediate clear JWK is
 415   // {"alg":"HS256","ext":true,"k":<b64urlKey>,"key_ops":["verify"],"kty":"oct"}
 416   // (Not shown is space padding to ensure the cleartext meets the size
 417   // requirements of the AES-KW algorithm.)
 418   const std::vector<uint8_t> key_data = HexStringToBytes(
 419       "000102030405060708090A0B0C0D0E0F000102030405060708090A0B0C0D0E0F");
 420   const std::vector<uint8_t> wrapped_key_data = HexStringToBytes(
 421       "14E6380B35FDC5B72E1994764B6CB7BFDD64E7832894356AAEE6C3768FC3D0F115E6B0"
 422       "6729756225F999AA99FDF81FD6A359F1576D3D23DE6CB69C3937054EB497AC1E8C38D5"
 423       "5E01B9783A20C8D930020932CF25926103002213D0FC37279888154FEBCEDF31832158"
 424       "97938C5CFE5B10B4254D0C399F39D0");
 425   const std::vector<uint8_t> wrapping_key_data =
 426       HexStringToBytes("000102030405060708090A0B0C0D0E0F");
 427   const blink::WebCryptoAlgorithm wrapping_algorithm =
 428       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
 429
 430   // Import the wrapping key.
 431   blink::WebCryptoKey wrapping_key = ImportSecretKeyFromRaw(
 432       wrapping_key_data, wrapping_algorithm, blink::WebCryptoKeyUsageUnwrapKey);
 433
 434   // Unwrap the known wrapped key data to produce a new key
 435   blink::WebCryptoKey unwrapped_key = blink::WebCryptoKey::createNull();
 436   ASSERT_EQ(
 437       Status::Success(),
 438       UnwrapKey(blink::WebCryptoKeyFormatJwk,
 439                 CryptoData(wrapped_key_data),
 440                 wrapping_key,
 441                 wrapping_algorithm,
 442                 CreateHmacImportAlgorithm(blink::WebCryptoAlgorithmIdSha256),
 443                 true,
 444                 blink::WebCryptoKeyUsageVerify,
 445                 &unwrapped_key));
 446
 447   // Validate the new key's attributes.
 448   EXPECT_FALSE(unwrapped_key.isNull());
 449   EXPECT_TRUE(unwrapped_key.handle());
 450   EXPECT_EQ(blink::WebCryptoKeyTypeSecret, unwrapped_key.type());
 451   EXPECT_EQ(blink::WebCryptoAlgorithmIdHmac, unwrapped_key.algorithm().id());
 452   EXPECT_EQ(blink::WebCryptoAlgorithmIdSha256,
 453             unwrapped_key.algorithm().hmacParams()->hash().id());
 454   EXPECT_EQ(256u, unwrapped_key.algorithm().hmacParams()->lengthBits());
 455   EXPECT_EQ(true, unwrapped_key.extractable());
 456   EXPECT_EQ(blink::WebCryptoKeyUsageVerify, unwrapped_key.usages());
 457
 458   // Export the new key's raw data and compare to the known original.
 459   std::vector<uint8_t> raw_key;
 460   EXPECT_EQ(Status::Success(),
 461             ExportKey(blink::WebCryptoKeyFormatRaw, unwrapped_key, &raw_key));
 462   EXPECT_BYTES_EQ(key_data, raw_key);
 463 }
 464
 465 // Try importing an AES-KW key with unsupported key usages using raw
 466 // format. AES-KW keys support the following usages:
 467 //   'wrapKey', 'unwrapKey'
 468 TEST(WebCryptoAesKwTest, ImportKeyBadUsage_Raw) {
 469   const blink::WebCryptoAlgorithm algorithm =
 470       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
 471
 472   blink::WebCryptoKeyUsageMask bad_usages[] = {
 473       blink::WebCryptoKeyUsageEncrypt,
 474       blink::WebCryptoKeyUsageDecrypt,
 475       blink::WebCryptoKeyUsageSign,
 476       blink::WebCryptoKeyUsageSign | blink::WebCryptoKeyUsageUnwrapKey,
 477       blink::WebCryptoKeyUsageDeriveBits,
 478       blink::WebCryptoKeyUsageUnwrapKey | blink::WebCryptoKeyUsageVerify,
 479   };
 480
 481   std::vector<uint8_t> key_bytes(16);
 482
 483   for (size_t i = 0; i < arraysize(bad_usages); ++i) {
 484     SCOPED_TRACE(i);
 485
 486     blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
 487     ASSERT_EQ(Status::ErrorCreateKeyBadUsages(),
 488               ImportKey(blink::WebCryptoKeyFormatRaw,
 489                         CryptoData(key_bytes),
 490                         algorithm,
 491                         true,
 492                         bad_usages[i],
 493                         &key));
 494   }
 495 }
 496
 497 // Try unwrapping an HMAC key with unsupported usages using JWK format and
 498 // AES-KW. HMAC keys support the following usages:
 499 //   'sign', 'verify'
 500 TEST(WebCryptoAesKwTest, UnwrapHmacKeyBadUsage_JWK) {
 501   const blink::WebCryptoAlgorithm unwrap_algorithm =
 502       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
 503
 504   blink::WebCryptoKeyUsageMask bad_usages[] = {
 505       blink::WebCryptoKeyUsageEncrypt,
 506       blink::WebCryptoKeyUsageDecrypt,
 507       blink::WebCryptoKeyUsageWrapKey,
 508       blink::WebCryptoKeyUsageSign | blink::WebCryptoKeyUsageWrapKey,
 509       blink::WebCryptoKeyUsageVerify | blink::WebCryptoKeyUsageDeriveKey,
 510   };
 511
 512   // Import the wrapping key.
 513   blink::WebCryptoKey wrapping_key = blink::WebCryptoKey::createNull();
 514   ASSERT_EQ(Status::Success(),
 515             ImportKey(blink::WebCryptoKeyFormatRaw,
 516                       CryptoData(std::vector<uint8_t>(16)),
 517                       unwrap_algorithm,
 518                       true,
 519                       blink::WebCryptoKeyUsageUnwrapKey,
 520                       &wrapping_key));
 521
 522   // The JWK plain text is:
 523   //   {   "kty": "oct","alg": "HS256","k": "GADWrMRHwQfoNaXU5fZvTg=="}
 524   const char* kWrappedJwk =
 525       "0AA245F17064FFB2A7A094436A39BEBFC962C627303D1327EA750CE9F917688C2782A943"
 526       "7AE7586547AC490E8AE7D5B02D63868D5C3BB57D36C4C8C5BF3962ACEC6F42E767E5706"
 527       "4";
 528
 529   for (size_t i = 0; i < arraysize(bad_usages); ++i) {
 530     SCOPED_TRACE(i);
 531
 532     blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
 533
 534     ASSERT_EQ(
 535         Status::ErrorCreateKeyBadUsages(),
 536         UnwrapKey(blink::WebCryptoKeyFormatJwk,
 537                   CryptoData(HexStringToBytes(kWrappedJwk)),
 538                   wrapping_key,
 539                   unwrap_algorithm,
 540                   CreateHmacImportAlgorithm(blink::WebCryptoAlgorithmIdSha256),
 541                   true,
 542                   bad_usages[i],
 543                   &key));
 544   }
 545 }
 546
 547 // Try unwrapping an RSA-SSA public key with unsupported usages using JWK format
 548 // and AES-KW. RSA-SSA public keys support the following usages:
 549 //   'verify'
 550 TEST(WebCryptoAesKwTest, UnwrapRsaSsaPublicKeyBadUsage_JWK) {
 551   const blink::WebCryptoAlgorithm unwrap_algorithm =
 552       CreateAlgorithm(blink::WebCryptoAlgorithmIdAesKw);
 553
 554   blink::WebCryptoKeyUsageMask bad_usages[] = {
 555       blink::WebCryptoKeyUsageEncrypt,
 556       blink::WebCryptoKeyUsageSign,
 557       blink::WebCryptoKeyUsageDecrypt,
 558       blink::WebCryptoKeyUsageWrapKey,
 559       blink::WebCryptoKeyUsageSign | blink::WebCryptoKeyUsageWrapKey,
 560   };
 561
 562   // Import the wrapping key.
 563   blink::WebCryptoKey wrapping_key = blink::WebCryptoKey::createNull();
 564   ASSERT_EQ(Status::Success(),
 565             ImportKey(blink::WebCryptoKeyFormatRaw,
 566                       CryptoData(std::vector<uint8_t>(16)),
 567                       unwrap_algorithm,
 568                       true,
 569                       blink::WebCryptoKeyUsageUnwrapKey,
 570                       &wrapping_key));
 571
 572   // The JWK plaintext is:
 573   // {    "kty": "RSA","alg": "RS256","n": "...","e": "AQAB"}
 574
 575   const char* kWrappedJwk =
 576       "CE8DAEF99E977EE58958B8C4494755C846E883B2ECA575C5366622839AF71AB30875F152"
 577       "E8E33E15A7817A3A2874EB53EFE05C774D98BC936BA9BA29BEB8BB3F3C3CE2323CB3359D"
 578       "E3F426605CF95CCF0E01E870ABD7E35F62E030B5FB6E520A5885514D1D850FB64B57806D"
 579       "1ADA57C6E27DF345D8292D80F6B074F1BE51C4CF3D76ECC8886218551308681B44FAC60B"
 580       "8CF6EA439BC63239103D0AE81ADB96F908680586C6169284E32EB7DD09D31103EBDAC0C2"
 581       "40C72DCF0AEA454113CC47457B13305B25507CBEAB9BDC8D8E0F867F9167F9DCEF0D9F9B"
 582       "30F2EE83CEDFD51136852C8A5939B768";
 583
 584   for (size_t i = 0; i < arraysize(bad_usages); ++i) {
 585     SCOPED_TRACE(i);
 586
 587     blink::WebCryptoKey key = blink::WebCryptoKey::createNull();
 588
 589     ASSERT_EQ(Status::ErrorCreateKeyBadUsages(),
 590               UnwrapKey(blink::WebCryptoKeyFormatJwk,
 591                         CryptoData(HexStringToBytes(kWrappedJwk)),
 592                         wrapping_key,
 593                         unwrap_algorithm,
 594                         CreateRsaHashedImportAlgorithm(
 595                             blink::WebCryptoAlgorithmIdRsaSsaPkcs1v1_5,
 596                             blink::WebCryptoAlgorithmIdSha256),
 597                         true,
 598                         bad_usages[i],
 599                         &key));
 600   }
 601 }
 602
 603 }  // namespace
 604
 605 }  // namespace webcrypto
 606
 607 }  // namespace content