Backward compatibility for licenses and certificates

Certificates and offline licenses are stored in security level
specific directories in klp. When devices transition from jb-mr2,
their persistent information has to be ported to these directories.

bug:10366036

Merge of https://widevine-internal-review.googlesource.com/#/c/7310/
from the widevine CDM repo

Change-Id: I70b4a79dc5b69bda7fc3a4b92fdcde7ef8b41836

libwvdrmengine/cdm/core/src/properties.cpp

@@ -4,6 +4,10 @@
 #include "properties_configuration.h"
 #include "wv_cdm_constants.h"
 
+namespace {
+const char *kSecurityLevelDirs[] = { "L1/", "L3/" };
+}  // namespace
+
 namespace wvcdm {
 bool Properties::begin_license_usage_when_received_;
 bool Properties::require_explicit_renew_request_;
@@ -13,6 +17,7 @@ bool Properties::oem_crypto_use_userspace_buffers_;
 bool Properties::use_certificates_as_identification_;
 bool Properties::extract_pssh_data_;
 bool Properties::decrypt_with_empty_session_support_;
+bool Properties::security_level_path_backward_compatibility_support_;
 scoped_ptr<CdmClientPropertySetMap> Properties::session_property_set_;
 
 void Properties::Init() {
@@ -25,6 +30,7 @@ void Properties::Init() {
       kPropertyUseCertificatesAsIdentification;
   extract_pssh_data_ = kExtractPsshData;
   decrypt_with_empty_session_support_ = kDecryptWithEmptySessionSupport;
+  security_level_path_backward_compatibility_support_ = kSecurityLevelPathBackwardCompatibilitySupport;
   session_property_set_.reset(new CdmClientPropertySetMap());
 }
 
@@ -93,4 +99,13 @@ bool Properties::UsePrivacyMode(const CdmSessionId& session_id) {
   }
   return property_set->use_privacy_mode();
 }
+
+bool Properties::GetSecurityLevelDirectories(std::vector<std::string>* dirs) {
+  dirs->resize(sizeof(kSecurityLevelDirs)/sizeof(const char*));
+  for (size_t i = 0; i < dirs->size(); ++i) {
+    (*dirs)[i] = kSecurityLevelDirs[i];
+  }
+  return true;
+}
+
 }  // namespace wvcdm