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Correct offline license handling

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[ Merge of http://go/wvgerrit/28261 ]

Licenses (offline, secure stops) that contain provider session tokens
are handled securely using usage tables. A recent fix did not correctly
handle offline licenses that do not contain a provider session token and
are not handled by the TEE.

b/62340248
Test: WV Unit/integration tests, GtsMediaTestCases

Change-Id: Ia1331fea9deff44dd1d93219b37f5bea4b8ee168
This commit is contained in:
Rahul Frias
2017-06-07 15:36:53 -07:00
parent ba346a1bea
commit 1857da2c8c
4 changed files with 26 additions and 11 deletions
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16
libwvdrmengine/cdm/core/src/cdm_session.cpp
View File

@@ -212,7 +212,14 @@ CdmResponseType CdmSession::RestoreOfflineSession(
return GET_RELEASED_LICENSE_ERROR;
}
if (usage_support_type_ == kUsageEntrySupport) {
std::string provider_session_token;
if (!license_parser_->ExtractProviderSessionToken(
key_response_, &provider_session_token)) {
provider_session_token.clear();
}
if (usage_support_type_ == kUsageEntrySupport &&
provider_session_token.size() > 0) {
CdmResponseType sts = usage_table_header_->LoadEntry(crypto_session_.get(),
usage_entry_,
usage_entry_number_);
@@ -236,7 +243,8 @@ CdmResponseType CdmSession::RestoreOfflineSession(
}
}
if (usage_support_type_ == kUsageEntrySupport) {
if (usage_support_type_ == kUsageEntrySupport &&
provider_session_token.size() > 0) {
CdmResponseType sts =
usage_table_header_->UpdateEntry(crypto_session_.get(), &usage_entry_);
if (sts != NO_ERROR) {
@@ -459,8 +467,10 @@ CdmResponseType CdmSession::AddKey(const CdmKeyResponse& key_response) {
key_response_ = key_response;
if (is_offline_ || has_provider_session_token()) {
if (usage_support_type_ == kUsageEntrySupport)
if (has_provider_session_token() &&
usage_support_type_ == kUsageEntrySupport) {
usage_table_header_->UpdateEntry(crypto_session_.get(), &usage_entry_);
}
if (!is_offline_)
usage_provider_session_token_ =