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MediaDrm throws an exception when Secure Stops are requested

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Our recommendation to OEMs is that they support a table of at least 50
usage entries in OEMCrypto. If more usage entries are stored, the PSTs get
added to the CDM but are LRU'ed out of the OEMCrypto usage table. When the
CDM queries those usage entries, OEMCrypto will return a
OEMCrypto_ERROR_INVALID_CONTEXT. Rather than return an error and have
MediaDrm throw an exception, CDM should delete this PST and return the
next usage entry, when queried.

[ Merge of https://widevine-internal-review.googlesource.com/#/c/11457/
  from Widevine cdm repo ]

b/17994711

Change-Id: I00e3f93000096fb434d94333e22958de795a4bb5
This commit is contained in:
Rahul Frias
2014-11-13 11:51:05 -08:00
parent 3b1a3e47d8
commit aa7ad630d7
9 changed files with 211 additions and 47 deletions
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4
libwvdrmengine/cdm/core/include/license.h
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@@ -36,8 +36,8 @@ class CdmLicense {
const CdmSessionId& session_id,
CdmKeyMessage* signed_request,
std::string* server_url);
virtual bool PrepareKeyUpdateRequest(bool is_renewal, CdmKeyMessage* signed_request,
std::string* server_url);
virtual CdmResponseType PrepareKeyUpdateRequest(
bool is_renewal, CdmKeyMessage* signed_request, std::string* server_url);
virtual CdmResponseType HandleKeyResponse(const CdmKeyResponse& license_response);
virtual CdmResponseType HandleKeyUpdateResponse(
bool is_renewal, const CdmKeyResponse& license_response);