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Delete usage information on insufficient resources

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[ Merge of http://go/wvgerrit/58460 ]

If OEMCrypto runs out of space in the usage table header+entries adding
a new license or loading/using an existing one might fail. This CL makes
two modifications to handle this scenario.

* OEMCrypto_ERROR_INSUFFICIENT_RESOURCES will be returned from
  OEMCrypto_CreateNewUsageEntry or OEMCrypto_LoadUsageEntry. An attempt
  will be made to release a LRU entry from the usage table and retry
  the operation. This may be retried 3 times unless success
  occurs earlier.

* On initialization, the usage table header is loaded. If there are more than
  the minimum number of usage entries (200), an attempt is made to
  add a usage entry. If this fails, we are likely in an unrecoverable
  state. We then delete all offline licenses, usage information and
  recreate the usage table header. This will allow future playback
  attempts to succeed and offline licenses to be able to be downloaded
  but will lose all current offline licenses and secure stops.

Bug: 112486006
Test: WV unit/integration tests, GtsMediaDrmTest
      Playback tests using Netflix and Play movies.

Change-Id: I41a18d69a329f8a96c7b607d299ce73af3d56177
This commit is contained in:
Rahul Frias
2018-08-22 11:55:41 -07:00
parent a20034e3a2
commit 299b100fc8
7 changed files with 1500 additions and 32 deletions
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92
libwvdrmengine/cdm/test/cdm_extended_duration_test.cpp
View File

@@ -268,16 +268,26 @@ class WvCdmExtendedDurationTest : public WvCdmTestBase {
void GenerateKeyRequest(const std::string& init_data,
CdmLicenseType license_type) {
CdmResponseType response;
GenerateKeyRequest(init_data, license_type, &response);
EXPECT_EQ(KEY_MESSAGE, response);
}
void GenerateKeyRequest(const std::string& init_data,
CdmLicenseType license_type,
CdmResponseType *response) {
CdmAppParameterMap app_parameters;
CdmKeyRequest key_request;
EXPECT_EQ(KEY_MESSAGE, decryptor_.GenerateKeyRequest(
session_id_, key_set_id_, "video/mp4", init_data,
license_type, app_parameters, NULL,
kDefaultCdmIdentifier, &key_request));
EXPECT_EQ(kKeyRequestTypeInitial, key_request.type);
key_msg_ = key_request.message;
EXPECT_EQ(0u, key_request.url.size());
*response = decryptor_.GenerateKeyRequest(
session_id_, key_set_id_, "video/mp4", init_data,
license_type, app_parameters, NULL,
kDefaultCdmIdentifier, &key_request);
if (*response == KEY_MESSAGE) {
EXPECT_EQ(kKeyRequestTypeInitial, key_request.type);
key_msg_ = key_request.message;
EXPECT_EQ(0u, key_request.url.size());
}
}
void GenerateRenewalRequest(CdmLicenseType license_type,
@@ -406,14 +416,21 @@ class WvCdmExtendedDurationTest : public WvCdmTestBase {
void VerifyKeyRequestResponse(const std::string& server_url,
const std::string& client_auth,
bool is_renewal) {
std::string resp = GetKeyRequestResponse(server_url, client_auth);
VerifyKeyRequestResponse(server_url, client_auth, is_renewal, NULL);
}
if (is_renewal) {
// TODO application makes a license request, CDM will renew the license
// when appropriate
EXPECT_EQ(KEY_ADDED, decryptor_.AddKey(session_id_, resp, &key_set_id_));
void VerifyKeyRequestResponse(const std::string& server_url,
const std::string& client_auth,
bool /* is_renewal */,
CdmResponseType* status) {
std::string resp = GetKeyRequestResponse(server_url, client_auth);
CdmResponseType sts =
decryptor_.AddKey(session_id_, resp, &key_set_id_);
if (status == NULL) {
EXPECT_EQ(KEY_ADDED, sts);
} else {
EXPECT_EQ(KEY_ADDED, decryptor_.AddKey(session_id_, resp, &key_set_id_));
*status = sts;
}
}
@@ -1574,6 +1591,55 @@ TEST_P(WvCdmOfflineUsageReportTest, UsageTest) {
INSTANTIATE_TEST_CASE_P(Cdm, WvCdmOfflineUsageReportTest,
::testing::Values(0, 1, 2));
// This test verifies that a device can still work if the maximum capacity
// of the usage entry table is reached. New usage entries, for offline
// licenses, can still be added and existing licenses can still be played back.
TEST_F(WvCdmExtendedDurationTest, MaxUsageEntryOfflineRecoveryTest) {
Unprovision();
Provision();
// override default settings unless configured through the command line
std::string key_id;
std::string client_auth;
GetOfflineConfiguration(&key_id, &client_auth);
// Download large number of offline licenses. If OEMCrypto returns
// OEMCrypto_ERROR_INSUFFICIENT_RESOURCES when usage table is at capacity,
// licenses will be deleted internally to make space and we might
// not encounter an error.
CdmResponseType response = NO_ERROR;
for (size_t i = 0; i < 2000; ++i) {
decryptor_.OpenSession(g_key_system, NULL, kDefaultCdmIdentifier, NULL,
&session_id_);
GenerateKeyRequest(key_id, kLicenseTypeOffline, &response);
if (response != KEY_MESSAGE) {
decryptor_.CloseSession(session_id_);
break;
}
VerifyKeyRequestResponse(kUatLicenseServer, client_auth, false, &response);
if (response != KEY_ADDED) {
decryptor_.CloseSession(session_id_);
break;
}
EXPECT_EQ(KEY_ADDED, response);
decryptor_.CloseSession(session_id_);
}
// If we encountered an error, verify that on UsageTableHeader creation
// the usage entries will be deleted and that we can add new ones.
if (response != KEY_ADDED && response != KEY_MESSAGE) {
Provision();
for (size_t i = 0; i < 10; ++i) {
decryptor_.OpenSession(g_key_system, NULL, kDefaultCdmIdentifier, NULL,
&session_id_);
GenerateKeyRequest(key_id, kLicenseTypeOffline);
VerifyKeyRequestResponse(kUatLicenseServer, client_auth, false);
decryptor_.CloseSession(session_id_);
}
}
}
} // namespace wvcdm
void show_menu(char* prog_name) {