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-rw-r--r--dom/media/gmp/CDMStorageIdProvider.cpp68
1 files changed, 68 insertions, 0 deletions
diff --git a/dom/media/gmp/CDMStorageIdProvider.cpp b/dom/media/gmp/CDMStorageIdProvider.cpp
new file mode 100644
index 0000000000..52255879b3
--- /dev/null
+++ b/dom/media/gmp/CDMStorageIdProvider.cpp
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "CDMStorageIdProvider.h"
+#include "GMPLog.h"
+#include "nsCOMPtr.h"
+#include "nsComponentManagerUtils.h"
+#include "nsICryptoHash.h"
+
+#ifdef SUPPORT_STORAGE_ID
+# include "rlz/lib/machine_id.h"
+#endif
+
+namespace mozilla {
+
+/*static*/
+nsCString CDMStorageIdProvider::ComputeStorageId(const nsCString& aOriginSalt) {
+#ifndef SUPPORT_STORAGE_ID
+ return ""_ns;
+#else
+ GMP_LOG_DEBUG("CDMStorageIdProvider::ComputeStorageId");
+
+ std::string machineId;
+ if (!rlz_lib::GetMachineId(&machineId)) {
+ GMP_LOG_DEBUG(
+ "CDMStorageIdProvider::ComputeStorageId: get machineId failed.");
+ return ""_ns;
+ }
+
+ std::string originSalt(aOriginSalt.BeginReading(), aOriginSalt.Length());
+ std::string input =
+ machineId + originSalt + CDMStorageIdProvider::kBrowserIdentifier;
+ nsCOMPtr<nsICryptoHash> hasher;
+ nsresult rv = NS_NewCryptoHash(nsICryptoHash::SHA256, getter_AddRefs(hasher));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ GMP_LOG_DEBUG(
+ "CDMStorageIdProvider::ComputeStorageId: failed to initialize "
+ "hash(0x%08" PRIx32 ")",
+ static_cast<uint32_t>(rv));
+ return ""_ns;
+ }
+
+ rv = hasher->Update(reinterpret_cast<const uint8_t*>(input.c_str()),
+ input.size());
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ GMP_LOG_DEBUG(
+ "CDMStorageIdProvider::ComputeStorageId: failed to update "
+ "hash(0x%08" PRIx32 ")",
+ static_cast<uint32_t>(rv));
+ return ""_ns;
+ }
+
+ nsCString storageId;
+ rv = hasher->Finish(false, storageId);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ GMP_LOG_DEBUG(
+ "CDMStorageIdProvider::ComputeStorageId: failed to get the final hash "
+ "result(0x%08" PRIx32 ")",
+ static_cast<uint32_t>(rv));
+ return ""_ns;
+ }
+ return storageId;
+#endif
+}
+
+} // namespace mozilla