1 files changed, 114 insertions, 0 deletions
diff --git a/media/gmp-clearkey/0.1/ClearKeyUtils.h b/media/gmp-clearkey/0.1/ClearKeyUtils.h
new file mode 100644
index 000000000..fc29b9211
--- /dev/null
+++ b/media/gmp-clearkey/0.1/ClearKeyUtils.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright 2015, Mozilla Foundation and contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __ClearKeyUtils_h__
+#define __ClearKeyUtils_h__
+
+#include <stdint.h>
+#include <string>
+#include <vector>
+#include <assert.h>
+#include "gmp-api/gmp-decryption.h"
+
+#if 0
+void CK_Log(const char* aFmt, ...);
+#define CK_LOGE(...) CK_Log(__VA_ARGS__)
+#define CK_LOGD(...) CK_Log(__VA_ARGS__)
+#define CK_LOGW(...) CK_Log(__VA_ARGS__)
+#else
+#define CK_LOGE(...)
+#define CK_LOGD(...)
+#define CK_LOGW(...)
+#endif
+
+struct GMPPlatformAPI;
+extern GMPPlatformAPI* GetPlatform();
+
+typedef std::vector<uint8_t> KeyId;
+typedef std::vector<uint8_t> Key;
+
+// The session response size should be within a reasonable limit.
+// The size 64 KB is referenced from web-platform-test.
+static const uint32_t kMaxSessionResponseLength = 65536;
+
+// Provide limitation for KeyIds length and webm initData size.
+static const uint32_t kMaxWebmInitDataSize = 65536;
+static const uint32_t kMaxKeyIdsLength = 512;
+
+struct KeyIdPair
+{
+  KeyId mKeyId;
+  Key mKey;
+};
+
+class ClearKeyUtils
+{
+public:
+  static void DecryptAES(const std::vector<uint8_t>& aKey,
+                         std::vector<uint8_t>& aData, std::vector<uint8_t>& aIV);
+
+  static bool ParseKeyIdsInitData(const uint8_t* aInitData,
+                                  uint32_t aInitDataSize,
+                                  std::vector<KeyId>& aOutKeyIds);
+
+  static void MakeKeyRequest(const std::vector<KeyId>& aKeyIds,
+                             std::string& aOutRequest,
+                             GMPSessionType aSessionType);
+
+  static bool ParseJWK(const uint8_t* aKeyData, uint32_t aKeyDataSize,
+                       std::vector<KeyIdPair>& aOutKeys,
+                       GMPSessionType aSessionType);
+  static const char* SessionTypeToString(GMPSessionType aSessionType);
+
+  static bool IsValidSessionId(const char* aBuff, uint32_t aLength);
+};
+
+template<class Container, class Element>
+inline bool
+Contains(const Container& aContainer, const Element& aElement)
+{
+  return aContainer.find(aElement) != aContainer.end();
+}
+
+class AutoLock {
+public:
+  explicit AutoLock(GMPMutex* aMutex)
+    : mMutex(aMutex)
+  {
+    assert(aMutex);
+    if (mMutex) {
+      mMutex->Acquire();
+    }
+  }
+  ~AutoLock() {
+    if (mMutex) {
+      mMutex->Release();
+    }
+  }
+private:
+  GMPMutex* mMutex;
+};
+
+GMPMutex* GMPCreateMutex();
+
+template<typename T>
+inline void
+Assign(std::vector<T>& aVec, const T* aData, size_t aLength)
+{
+  aVec.assign(aData, aData + aLength);
+}
+
+#endif // __ClearKeyUtils_h__