src/media/cdm/aes_decryptor_unittest.cc

   1 // Copyright 2013 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 <string>
   6 #include <vector>
   7
   8 #include "base/basictypes.h"
   9 #include "base/bind.h"
  10 #include "media/base/decoder_buffer.h"
  11 #include "media/base/decrypt_config.h"
  12 #include "media/base/mock_filters.h"
  13 #include "media/cdm/aes_decryptor.h"
  14 #include "media/webm/webm_constants.h"
  15 #include "testing/gmock/include/gmock/gmock.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17
  18 using ::testing::_;
  19 using ::testing::Gt;
  20 using ::testing::IsNull;
  21 using ::testing::NotNull;
  22 using ::testing::SaveArg;
  23 using ::testing::StrNe;
  24
  25 MATCHER(IsEmpty, "") { return arg.empty(); }
  26
  27 namespace media {
  28
  29 const uint8 kOriginalData[] = "Original subsample data.";
  30 const int kOriginalDataSize = 24;
  31
  32 // In the examples below, 'k'(key) has to be 16 bytes, and will always require
  33 // 2 bytes of padding. 'kid'(keyid) is variable length, and may require 0, 1,
  34 // or 2 bytes of padding.
  35
  36 const uint8 kKeyId[] = {
  37     // base64 equivalent is AAECAw
  38     0x00, 0x01, 0x02, 0x03
  39 };
  40
  41 const uint8 kKey[] = {
  42     // base64 equivalent is BAUGBwgJCgsMDQ4PEBESEw
  43     0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b,
  44     0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13
  45 };
  46
  47 const char kKeyAsJWK[] =
  48     "{"
  49     "  \"keys\": ["
  50     "    {"
  51     "      \"kty\": \"oct\","
  52     "      \"kid\": \"AAECAw\","
  53     "      \"k\": \"BAUGBwgJCgsMDQ4PEBESEw\""
  54     "    }"
  55     "  ]"
  56     "}";
  57
  58 const char kWrongKeyAsJWK[] =
  59     "{"
  60     "  \"keys\": ["
  61     "    {"
  62     "      \"kty\": \"oct\","
  63     "      \"kid\": \"AAECAw\","
  64     "      \"k\": \"7u7u7u7u7u7u7u7u7u7u7g\""
  65     "    }"
  66     "  ]"
  67     "}";
  68
  69 const char kWrongSizedKeyAsJWK[] =
  70     "{"
  71     "  \"keys\": ["
  72     "    {"
  73     "      \"kty\": \"oct\","
  74     "      \"kid\": \"AAECAw\","
  75     "      \"k\": \"AAECAw\""
  76     "    }"
  77     "  ]"
  78     "}";
  79
  80 const uint8 kIv[] = {
  81   0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
  82   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
  83 };
  84
  85 // kOriginalData encrypted with kKey and kIv but without any subsamples (or
  86 // equivalently using kSubsampleEntriesCypherOnly).
  87 const uint8 kEncryptedData[] = {
  88   0x2f, 0x03, 0x09, 0xef, 0x71, 0xaf, 0x31, 0x16,
  89   0xfa, 0x9d, 0x18, 0x43, 0x1e, 0x96, 0x71, 0xb5,
  90   0xbf, 0xf5, 0x30, 0x53, 0x9a, 0x20, 0xdf, 0x95
  91 };
  92
  93 // kOriginalData encrypted with kSubsampleKey and kSubsampleIv using
  94 // kSubsampleEntriesNormal.
  95 const uint8 kSubsampleEncryptedData[] = {
  96   0x4f, 0x72, 0x09, 0x16, 0x09, 0xe6, 0x79, 0xad,
  97   0x70, 0x73, 0x75, 0x62, 0x09, 0xbb, 0x83, 0x1d,
  98   0x4d, 0x08, 0xd7, 0x78, 0xa4, 0xa7, 0xf1, 0x2e
  99 };
 100
 101 const uint8 kOriginalData2[] = "Changed Original data.";
 102
 103 const uint8 kIv2[] = {
 104   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 105   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 106 };
 107
 108 const uint8 kKeyId2[] = {
 109     // base64 equivalent is AAECAwQFBgcICQoLDA0ODxAREhM=
 110     0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
 111     0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
 112     0x10, 0x11, 0x12, 0x13
 113 };
 114
 115 const char kKey2AsJWK[] =
 116     "{"
 117     "  \"keys\": ["
 118     "    {"
 119     "      \"kty\": \"oct\","
 120     "      \"kid\": \"AAECAwQFBgcICQoLDA0ODxAREhM\","
 121     "      \"k\": \"FBUWFxgZGhscHR4fICEiIw\""
 122     "    }"
 123     "  ]"
 124     "}";
 125
 126 // 'k' in bytes is x14x15x16x17x18x19x1ax1bx1cx1dx1ex1fx20x21x22x23
 127
 128 const uint8 kEncryptedData2[] = {
 129   0x57, 0x66, 0xf4, 0x12, 0x1a, 0xed, 0xb5, 0x79,
 130   0x1c, 0x8e, 0x25, 0xd7, 0x17, 0xe7, 0x5e, 0x16,
 131   0xe3, 0x40, 0x08, 0x27, 0x11, 0xe9
 132 };
 133
 134 // Subsample entries for testing. The sum of |cypher_bytes| and |clear_bytes| of
 135 // all entries must be equal to kOriginalDataSize to make the subsample entries
 136 // valid.
 137
 138 const SubsampleEntry kSubsampleEntriesNormal[] = {
 139   { 2, 7 },
 140   { 3, 11 },
 141   { 1, 0 }
 142 };
 143
 144 const SubsampleEntry kSubsampleEntriesWrongSize[] = {
 145   { 3, 6 }, // This entry doesn't match the correct entry.
 146   { 3, 11 },
 147   { 1, 0 }
 148 };
 149
 150 const SubsampleEntry kSubsampleEntriesInvalidTotalSize[] = {
 151   { 1, 1000 }, // This entry is too large.
 152   { 3, 11 },
 153   { 1, 0 }
 154 };
 155
 156 const SubsampleEntry kSubsampleEntriesClearOnly[] = {
 157   { 7, 0 },
 158   { 8, 0 },
 159   { 9, 0 }
 160 };
 161
 162 const SubsampleEntry kSubsampleEntriesCypherOnly[] = {
 163   { 0, 6 },
 164   { 0, 8 },
 165   { 0, 10 }
 166 };
 167
 168 static scoped_refptr<DecoderBuffer> CreateEncryptedBuffer(
 169     const std::vector<uint8>& data,
 170     const std::vector<uint8>& key_id,
 171     const std::vector<uint8>& iv,
 172     int offset,
 173     const std::vector<SubsampleEntry>& subsample_entries) {
 174   DCHECK(!data.empty());
 175   int padded_size = offset + data.size();
 176   scoped_refptr<DecoderBuffer> encrypted_buffer(new DecoderBuffer(padded_size));
 177   memcpy(encrypted_buffer->writable_data() + offset, &data[0], data.size());
 178   CHECK(encrypted_buffer.get());
 179   std::string key_id_string(
 180       reinterpret_cast<const char*>(key_id.empty() ? NULL : &key_id[0]),
 181       key_id.size());
 182   std::string iv_string(
 183       reinterpret_cast<const char*>(iv.empty() ? NULL : &iv[0]), iv.size());
 184   encrypted_buffer->set_decrypt_config(scoped_ptr<DecryptConfig>(
 185       new DecryptConfig(key_id_string, iv_string, offset, subsample_entries)));
 186   return encrypted_buffer;
 187 }
 188
 189 class AesDecryptorTest : public testing::Test {
 190  public:
 191   AesDecryptorTest()
 192       : decryptor_(
 193             base::Bind(&AesDecryptorTest::KeyAdded, base::Unretained(this)),
 194             base::Bind(&AesDecryptorTest::KeyError, base::Unretained(this)),
 195             base::Bind(&AesDecryptorTest::KeyMessage, base::Unretained(this))),
 196         decrypt_cb_(base::Bind(&AesDecryptorTest::BufferDecrypted,
 197                                base::Unretained(this))),
 198         original_data_(kOriginalData, kOriginalData + kOriginalDataSize),
 199         encrypted_data_(kEncryptedData,
 200                         kEncryptedData + arraysize(kEncryptedData)),
 201         subsample_encrypted_data_(
 202             kSubsampleEncryptedData,
 203             kSubsampleEncryptedData + arraysize(kSubsampleEncryptedData)),
 204         key_id_(kKeyId, kKeyId + arraysize(kKeyId)),
 205         iv_(kIv, kIv + arraysize(kIv)),
 206         normal_subsample_entries_(
 207             kSubsampleEntriesNormal,
 208             kSubsampleEntriesNormal + arraysize(kSubsampleEntriesNormal)) {
 209   }
 210
 211  protected:
 212   void GenerateKeyRequest(const std::vector<uint8>& key_id) {
 213     DCHECK(!key_id.empty());
 214     EXPECT_CALL(*this, KeyMessage(StrNe(std::string()), key_id, ""))
 215         .WillOnce(SaveArg<0>(&session_id_string_));
 216     EXPECT_TRUE(decryptor_.GenerateKeyRequest(
 217         std::string(), &key_id[0], key_id.size()));
 218   }
 219
 220   enum AddKeyExpectation {
 221     KEY_ADDED,
 222     KEY_ERROR
 223   };
 224
 225   void AddRawKeyAndExpect(const std::vector<uint8>& key_id,
 226                           const std::vector<uint8>& key,
 227                           AddKeyExpectation result) {
 228     // TODO(jrummell): Remove once raw keys no longer supported.
 229     DCHECK(!key_id.empty());
 230     DCHECK(!key.empty());
 231
 232     if (result == KEY_ADDED) {
 233       EXPECT_CALL(*this, KeyAdded(session_id_string_));
 234     } else if (result == KEY_ERROR) {
 235       EXPECT_CALL(*this, KeyError(session_id_string_,
 236                                   MediaKeys::kUnknownError, 0));
 237     } else {
 238       NOTREACHED();
 239     }
 240
 241     decryptor_.AddKey(&key[0], key.size(), &key_id[0], key_id.size(),
 242                       session_id_string_);
 243   }
 244
 245   void AddKeyAndExpect(const std::string& key, AddKeyExpectation result) {
 246     DCHECK(!key.empty());
 247
 248     if (result == KEY_ADDED) {
 249       EXPECT_CALL(*this, KeyAdded(session_id_string_));
 250     } else if (result == KEY_ERROR) {
 251       EXPECT_CALL(*this,
 252                   KeyError(session_id_string_, MediaKeys::kUnknownError, 0));
 253     } else {
 254       NOTREACHED();
 255     }
 256
 257     decryptor_.AddKey(reinterpret_cast<const uint8*>(key.c_str()), key.length(),
 258                       NULL, 0,
 259                       session_id_string_);
 260   }
 261
 262   MOCK_METHOD2(BufferDecrypted, void(Decryptor::Status,
 263                                      const scoped_refptr<DecoderBuffer>&));
 264
 265   enum DecryptExpectation {
 266     SUCCESS,
 267     DATA_MISMATCH,
 268     DATA_AND_SIZE_MISMATCH,
 269     DECRYPT_ERROR
 270   };
 271
 272   void DecryptAndExpect(const scoped_refptr<DecoderBuffer>& encrypted,
 273                         const std::vector<uint8>& plain_text,
 274                         DecryptExpectation result) {
 275     scoped_refptr<DecoderBuffer> decrypted;
 276
 277     if (result != DECRYPT_ERROR) {
 278       EXPECT_CALL(*this, BufferDecrypted(Decryptor::kSuccess, NotNull()))
 279           .WillOnce(SaveArg<1>(&decrypted));
 280     } else {
 281       EXPECT_CALL(*this, BufferDecrypted(Decryptor::kError, IsNull()))
 282           .WillOnce(SaveArg<1>(&decrypted));
 283     }
 284
 285     decryptor_.Decrypt(Decryptor::kVideo, encrypted, decrypt_cb_);
 286
 287     std::vector<uint8> decrypted_text;
 288     if (decrypted && decrypted->data_size()) {
 289       decrypted_text.assign(
 290         decrypted->data(), decrypted->data() + decrypted->data_size());
 291     }
 292
 293     switch (result) {
 294       case SUCCESS:
 295         EXPECT_EQ(plain_text, decrypted_text);
 296         break;
 297       case DATA_MISMATCH:
 298         EXPECT_EQ(plain_text.size(), decrypted_text.size());
 299         EXPECT_NE(plain_text, decrypted_text);
 300         break;
 301       case DATA_AND_SIZE_MISMATCH:
 302         EXPECT_NE(plain_text.size(), decrypted_text.size());
 303         break;
 304       case DECRYPT_ERROR:
 305         EXPECT_TRUE(decrypted_text.empty());
 306         break;
 307     }
 308   }
 309
 310   MOCK_METHOD1(KeyAdded, void(const std::string&));
 311   MOCK_METHOD3(KeyError, void(const std::string&,
 312                               MediaKeys::KeyError, int));
 313   MOCK_METHOD3(KeyMessage, void(const std::string& session_id,
 314                                 const std::vector<uint8>& message,
 315                                 const std::string& default_url));
 316
 317   AesDecryptor decryptor_;
 318   std::string session_id_string_;
 319   AesDecryptor::DecryptCB decrypt_cb_;
 320
 321   // Constants for testing.
 322   const std::vector<uint8> original_data_;
 323   const std::vector<uint8> encrypted_data_;
 324   const std::vector<uint8> subsample_encrypted_data_;
 325   const std::vector<uint8> key_id_;
 326   const std::vector<uint8> iv_;
 327   const std::vector<SubsampleEntry> normal_subsample_entries_;
 328   const std::vector<SubsampleEntry> no_subsample_entries_;
 329 };
 330
 331 TEST_F(AesDecryptorTest, GenerateKeyRequestWithNullInitData) {
 332   EXPECT_CALL(*this, KeyMessage(StrNe(std::string()), IsEmpty(), ""));
 333   EXPECT_TRUE(decryptor_.GenerateKeyRequest(std::string(), NULL, 0));
 334 }
 335
 336 TEST_F(AesDecryptorTest, NormalDecryption) {
 337   GenerateKeyRequest(key_id_);
 338   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 339   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 340       encrypted_data_, key_id_, iv_, 0, no_subsample_entries_);
 341   DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS);
 342 }
 343
 344 TEST_F(AesDecryptorTest, DecryptionWithOffset) {
 345   GenerateKeyRequest(key_id_);
 346   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 347   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 348       encrypted_data_, key_id_, iv_, 23, no_subsample_entries_);
 349   DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS);
 350 }
 351
 352 TEST_F(AesDecryptorTest, UnencryptedFrame) {
 353   // An empty iv string signals that the frame is unencrypted.
 354   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 355       original_data_, key_id_, std::vector<uint8>(), 0, no_subsample_entries_);
 356   DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS);
 357 }
 358
 359 TEST_F(AesDecryptorTest, WrongKey) {
 360   GenerateKeyRequest(key_id_);
 361   AddKeyAndExpect(kWrongKeyAsJWK, KEY_ADDED);
 362   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 363       encrypted_data_, key_id_, iv_, 0, no_subsample_entries_);
 364   DecryptAndExpect(encrypted_buffer, original_data_, DATA_MISMATCH);
 365 }
 366
 367 TEST_F(AesDecryptorTest, NoKey) {
 368   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 369       encrypted_data_, key_id_, iv_, 0, no_subsample_entries_);
 370   EXPECT_CALL(*this, BufferDecrypted(AesDecryptor::kNoKey, IsNull()));
 371   decryptor_.Decrypt(Decryptor::kVideo, encrypted_buffer, decrypt_cb_);
 372 }
 373
 374 TEST_F(AesDecryptorTest, KeyReplacement) {
 375   GenerateKeyRequest(key_id_);
 376   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 377       encrypted_data_, key_id_, iv_, 0, no_subsample_entries_);
 378
 379   AddKeyAndExpect(kWrongKeyAsJWK, KEY_ADDED);
 380   ASSERT_NO_FATAL_FAILURE(DecryptAndExpect(
 381       encrypted_buffer, original_data_, DATA_MISMATCH));
 382
 383   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 384   ASSERT_NO_FATAL_FAILURE(
 385       DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS));
 386 }
 387
 388 TEST_F(AesDecryptorTest, WrongSizedKey) {
 389   GenerateKeyRequest(key_id_);
 390   AddKeyAndExpect(kWrongSizedKeyAsJWK, KEY_ERROR);
 391
 392   // Repeat for a raw key. Use "-1" to create a wrong sized key.
 393   std::vector<uint8> wrong_sized_key(kKey, kKey + arraysize(kKey) - 1);
 394   AddRawKeyAndExpect(key_id_, wrong_sized_key, KEY_ERROR);
 395 }
 396
 397 TEST_F(AesDecryptorTest, MultipleKeysAndFrames) {
 398   GenerateKeyRequest(key_id_);
 399   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 400   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 401       encrypted_data_, key_id_, iv_, 10, no_subsample_entries_);
 402   ASSERT_NO_FATAL_FAILURE(
 403       DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS));
 404
 405   AddKeyAndExpect(kKey2AsJWK, KEY_ADDED);
 406
 407   // The first key is still available after we added a second key.
 408   ASSERT_NO_FATAL_FAILURE(
 409       DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS));
 410
 411   // The second key is also available.
 412   encrypted_buffer = CreateEncryptedBuffer(
 413       std::vector<uint8>(kEncryptedData2,
 414                          kEncryptedData2 + arraysize(kEncryptedData2)),
 415       std::vector<uint8>(kKeyId2, kKeyId2 + arraysize(kKeyId2)),
 416       std::vector<uint8>(kIv2, kIv2 + arraysize(kIv2)),
 417       30,
 418       no_subsample_entries_);
 419   ASSERT_NO_FATAL_FAILURE(DecryptAndExpect(
 420       encrypted_buffer,
 421       std::vector<uint8>(kOriginalData2,
 422                          kOriginalData2 + arraysize(kOriginalData2) - 1),
 423       SUCCESS));
 424 }
 425
 426 TEST_F(AesDecryptorTest, CorruptedIv) {
 427   GenerateKeyRequest(key_id_);
 428   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 429
 430   std::vector<uint8> bad_iv = iv_;
 431   bad_iv[1]++;
 432
 433   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 434       encrypted_data_, key_id_, bad_iv, 0, no_subsample_entries_);
 435
 436   DecryptAndExpect(encrypted_buffer, original_data_, DATA_MISMATCH);
 437 }
 438
 439 TEST_F(AesDecryptorTest, CorruptedData) {
 440   GenerateKeyRequest(key_id_);
 441   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 442
 443   std::vector<uint8> bad_data = encrypted_data_;
 444   bad_data[1]++;
 445
 446   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 447       bad_data, key_id_, iv_, 0, no_subsample_entries_);
 448   DecryptAndExpect(encrypted_buffer, original_data_, DATA_MISMATCH);
 449 }
 450
 451 TEST_F(AesDecryptorTest, EncryptedAsUnencryptedFailure) {
 452   GenerateKeyRequest(key_id_);
 453   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 454   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 455       encrypted_data_, key_id_, std::vector<uint8>(), 0, no_subsample_entries_);
 456   DecryptAndExpect(encrypted_buffer, original_data_, DATA_MISMATCH);
 457 }
 458
 459 TEST_F(AesDecryptorTest, SubsampleDecryption) {
 460   GenerateKeyRequest(key_id_);
 461   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 462   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 463       subsample_encrypted_data_, key_id_, iv_, 0, normal_subsample_entries_);
 464   DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS);
 465 }
 466
 467 // Ensures noninterference of data offset and subsample mechanisms. We never
 468 // expect to encounter this in the wild, but since the DecryptConfig doesn't
 469 // disallow such a configuration, it should be covered.
 470 TEST_F(AesDecryptorTest, SubsampleDecryptionWithOffset) {
 471   GenerateKeyRequest(key_id_);
 472   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 473   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 474       subsample_encrypted_data_, key_id_, iv_, 23, normal_subsample_entries_);
 475   DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS);
 476 }
 477
 478 TEST_F(AesDecryptorTest, SubsampleWrongSize) {
 479   GenerateKeyRequest(key_id_);
 480   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 481
 482   std::vector<SubsampleEntry> subsample_entries_wrong_size(
 483       kSubsampleEntriesWrongSize,
 484       kSubsampleEntriesWrongSize + arraysize(kSubsampleEntriesWrongSize));
 485
 486   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 487       subsample_encrypted_data_, key_id_, iv_, 0, subsample_entries_wrong_size);
 488   DecryptAndExpect(encrypted_buffer, original_data_, DATA_MISMATCH);
 489 }
 490
 491 TEST_F(AesDecryptorTest, SubsampleInvalidTotalSize) {
 492   GenerateKeyRequest(key_id_);
 493   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 494
 495   std::vector<SubsampleEntry> subsample_entries_invalid_total_size(
 496       kSubsampleEntriesInvalidTotalSize,
 497       kSubsampleEntriesInvalidTotalSize +
 498           arraysize(kSubsampleEntriesInvalidTotalSize));
 499
 500   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 501       subsample_encrypted_data_, key_id_, iv_, 0,
 502       subsample_entries_invalid_total_size);
 503   DecryptAndExpect(encrypted_buffer, original_data_, DECRYPT_ERROR);
 504 }
 505
 506 // No cypher bytes in any of the subsamples.
 507 TEST_F(AesDecryptorTest, SubsampleClearBytesOnly) {
 508   GenerateKeyRequest(key_id_);
 509   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 510
 511   std::vector<SubsampleEntry> clear_only_subsample_entries(
 512       kSubsampleEntriesClearOnly,
 513       kSubsampleEntriesClearOnly + arraysize(kSubsampleEntriesClearOnly));
 514
 515   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 516       original_data_, key_id_, iv_, 0, clear_only_subsample_entries);
 517   DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS);
 518 }
 519
 520 // No clear bytes in any of the subsamples.
 521 TEST_F(AesDecryptorTest, SubsampleCypherBytesOnly) {
 522   GenerateKeyRequest(key_id_);
 523   AddKeyAndExpect(kKeyAsJWK, KEY_ADDED);
 524
 525   std::vector<SubsampleEntry> cypher_only_subsample_entries(
 526       kSubsampleEntriesCypherOnly,
 527       kSubsampleEntriesCypherOnly + arraysize(kSubsampleEntriesCypherOnly));
 528
 529   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 530       encrypted_data_, key_id_, iv_, 0, cypher_only_subsample_entries);
 531   DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS);
 532 }
 533
 534 TEST_F(AesDecryptorTest, JWKKey) {
 535   // Try a simple JWK key (i.e. not in a set)
 536   const std::string key1 =
 537       "{"
 538       "  \"kty\": \"oct\","
 539       "  \"kid\": \"AAECAwQFBgcICQoLDA0ODxAREhM\","
 540       "  \"k\": \"FBUWFxgZGhscHR4fICEiIw\""
 541       "}";
 542   AddKeyAndExpect(key1, KEY_ERROR);
 543
 544   // Try a key list with multiple entries.
 545   const std::string key2 =
 546       "{"
 547       "  \"keys\": ["
 548       "    {"
 549       "      \"kty\": \"oct\","
 550       "      \"kid\": \"AAECAwQFBgcICQoLDA0ODxAREhM\","
 551       "      \"k\": \"FBUWFxgZGhscHR4fICEiIw\""
 552       "    },"
 553       "    {"
 554       "      \"kty\": \"oct\","
 555       "      \"kid\": \"JCUmJygpKissLS4vMA\","
 556       "      \"k\":\"MTIzNDU2Nzg5Ojs8PT4/QA\""
 557       "    }"
 558       "  ]"
 559       "}";
 560   AddKeyAndExpect(key2, KEY_ADDED);
 561
 562   // Try a key with no spaces and some \n plus additional fields.
 563   const std::string key3 =
 564       "\n\n{\"something\":1,\"keys\":[{\n\n\"kty\":\"oct\",\"alg\":\"A128KW\","
 565       "\"kid\":\"AAECAwQFBgcICQoLDA0ODxAREhM\",\"k\":\"GawgguFyGrWKav7AX4VKUg"
 566       "\",\"foo\":\"bar\"}]}\n\n";
 567   AddKeyAndExpect(key3, KEY_ADDED);
 568
 569   // Try some non-ASCII characters.
 570   AddKeyAndExpect("This is not ASCII due to \xff\xfe\xfd in it.", KEY_ERROR);
 571
 572   // Try a badly formatted key. Assume that the JSON parser is fully tested,
 573   // so we won't try a lot of combinations. However, need a test to ensure
 574   // that the code doesn't crash if invalid JSON received.
 575   AddKeyAndExpect("This is not a JSON key.", KEY_ERROR);
 576
 577   // Try passing some valid JSON that is not a dictionary at the top level.
 578   AddKeyAndExpect("40", KEY_ERROR);
 579
 580   // Try an empty dictionary.
 581   AddKeyAndExpect("{ }", KEY_ERROR);
 582
 583   // Try an empty 'keys' dictionary.
 584   AddKeyAndExpect("{ \"keys\": [] }", KEY_ERROR);
 585
 586   // Try with 'keys' not a dictionary.
 587   AddKeyAndExpect("{ \"keys\":\"1\" }", KEY_ERROR);
 588
 589   // Try with 'keys' a list of integers.
 590   AddKeyAndExpect("{ \"keys\": [ 1, 2, 3 ] }", KEY_ERROR);
 591
 592   // TODO(jrummell): The next 2 tests should fail once checking for padding
 593   // characters is enabled.
 594   // Try a key with padding(=) at end of base64 string.
 595   const std::string key4 =
 596       "{"
 597       "  \"keys\": ["
 598       "    {"
 599       "      \"kty\": \"oct\","
 600       "      \"kid\": \"AAECAw\","
 601       "      \"k\": \"BAUGBwgJCgsMDQ4PEBESEw==\""
 602       "    }"
 603       "  ]"
 604       "}";
 605   AddKeyAndExpect(key4, KEY_ADDED);
 606
 607   // Try a key ID with padding(=) at end of base64 string.
 608   const std::string key5 =
 609       "{"
 610       "  \"keys\": ["
 611       "    {"
 612       "      \"kty\": \"oct\","
 613       "      \"kid\": \"AAECAw==\","
 614       "      \"k\": \"BAUGBwgJCgsMDQ4PEBESEw\""
 615       "    }"
 616       "  ]"
 617       "}";
 618   AddKeyAndExpect(key5, KEY_ADDED);
 619
 620   // Try a key with invalid base64 encoding.
 621   const std::string key6 =
 622       "{"
 623       "  \"keys\": ["
 624       "    {"
 625       "      \"kty\": \"oct\","
 626       "      \"kid\": \"!@#$%^&*()\","
 627       "      \"k\": \"BAUGBwgJCgsMDQ4PEBESEw\""
 628       "    }"
 629       "  ]"
 630       "}";
 631   AddKeyAndExpect(key6, KEY_ERROR);
 632
 633   // Try a key where no padding is required. 'k' has to be 16 bytes, so it
 634   // will always require padding. (Test above using |key2| has 2 'kid's that
 635   // require 1 and 2 padding bytes).
 636   const std::string key7 =
 637       "{"
 638       "  \"keys\": ["
 639       "    {"
 640       "      \"kty\": \"oct\","
 641       "      \"kid\": \"Kiss\","
 642       "      \"k\": \"BAUGBwgJCgsMDQ4PEBESEw\""
 643       "    }"
 644       "  ]"
 645       "}";
 646   AddKeyAndExpect(key7, KEY_ADDED);
 647
 648   // Empty key id.
 649   const std::string key8 =
 650       "{"
 651       "  \"keys\": ["
 652       "    {"
 653       "      \"kty\": \"oct\","
 654       "      \"kid\": \"\","
 655       "      \"k\": \"BAUGBwgJCgsMDQ4PEBESEw\""
 656       "    }"
 657       "  ]"
 658       "}";
 659   AddKeyAndExpect(key8, KEY_ERROR);
 660 }
 661
 662 TEST_F(AesDecryptorTest, RawKey) {
 663   // Verify that v0.1b keys (raw key) is still supported. Raw keys are
 664   // 16 bytes long. Use the undecoded value of |kKey|.
 665   GenerateKeyRequest(key_id_);
 666   AddRawKeyAndExpect(
 667       key_id_, std::vector<uint8>(kKey, kKey + arraysize(kKey)), KEY_ADDED);
 668   scoped_refptr<DecoderBuffer> encrypted_buffer = CreateEncryptedBuffer(
 669       encrypted_data_, key_id_, iv_, 0, no_subsample_entries_);
 670   DecryptAndExpect(encrypted_buffer, original_data_, SUCCESS);
 671 }
 672
 673 }  // namespace media