diff --git a/include/drm/DrmInfoEvent.h b/include/drm/DrmInfoEvent.h
index dfca228..23b2950 100644
--- a/include/drm/DrmInfoEvent.h
+++ b/include/drm/DrmInfoEvent.h
@@ -17,6 +17,8 @@
 #ifndef __DRM_INFO_EVENT_H__
 #define __DRM_INFO_EVENT_H__
 
+#include "drm_framework_common.h"
+
 namespace android {
 
 class String8;
@@ -71,18 +73,70 @@
 
 public:
     /**
-     * Constructor for DrmInfoEvent
+     * Constructor for DrmInfoEvent.
+     * Data in drmBuffer are copied to newly allocated buffer.
      *
      * @param[in] uniqueId Unique session identifier
      * @param[in] infoType Type of information
      * @param[in] message Message description
+     * @param[in] drmBuffer Binary information
      */
     DrmInfoEvent(int uniqueId, int infoType, const String8 message);
+    DrmInfoEvent(int uniqueId, int infoType, const String8 message, const DrmBuffer& drmBuffer);
 
     /**
      * Destructor for DrmInfoEvent
      */
-    virtual ~DrmInfoEvent() {}
+    ~DrmInfoEvent();
+
+public:
+    /**
+     * Iterator for key
+     */
+    class KeyIterator {
+        friend class DrmInfoEvent;
+
+    private:
+        KeyIterator(const DrmInfoEvent* drmInfoEvent)
+                : mDrmInfoEvent(const_cast <DrmInfoEvent*> (drmInfoEvent)), mIndex(0) {}
+
+    public:
+        KeyIterator(const KeyIterator& keyIterator);
+        KeyIterator& operator=(const KeyIterator& keyIterator);
+        virtual ~KeyIterator() {}
+
+    public:
+        bool hasNext();
+        const String8& next();
+
+    private:
+        DrmInfoEvent* mDrmInfoEvent;
+        unsigned int mIndex;
+    };
+
+    /**
+     * Iterator
+     */
+    class Iterator {
+        friend class DrmInfoEvent;
+
+    private:
+        Iterator(const DrmInfoEvent* drmInfoEvent)
+                : mDrmInfoEvent(const_cast <DrmInfoEvent*> (drmInfoEvent)), mIndex(0) {}
+
+    public:
+        Iterator(const Iterator& iterator);
+        Iterator& operator=(const Iterator& iterator);
+        virtual ~Iterator() {}
+
+    public:
+        bool hasNext();
+        const String8& next();
+
+    private:
+        DrmInfoEvent* mDrmInfoEvent;
+        unsigned int mIndex;
+    };
 
 public:
     /**
@@ -106,10 +160,69 @@
      */
     const String8 getMessage() const;
 
+    /**
+     * Returns the number of attributes contained in this instance
+     *
+     * @return Number of attributes
+     */
+    int getCount() const;
+
+    /**
+     * Adds optional information as <key, value> pair to this instance
+     *
+     * @param[in] key Key to add
+     * @param[in] value Value to add
+     * @return Returns the error code
+     */
+    status_t put(const String8& key, String8& value);
+
+    /**
+     * Retrieves the value of given key
+     *
+     * @param key Key whose value to be retrieved
+     * @return The value
+     */
+    const String8 get(const String8& key) const;
+
+    /**
+     * Returns KeyIterator object to walk through the keys associated with this instance
+     *
+     * @return KeyIterator object
+     */
+    KeyIterator keyIterator() const;
+
+    /**
+     * Returns Iterator object to walk through the values associated with this instance
+     *
+     * @return Iterator object
+     */
+    Iterator iterator() const;
+
+    /**
+     * Returns the Binary information associated with this instance
+     *
+     * @return Binary information
+     */
+    const DrmBuffer& getData() const;
+
+    /**
+     * Sets the Binary information associated with this instance.
+     * Data in drmBuffer are copied to newly allocated buffer.
+     *
+     * @param[in] drmBuffer Binary information associated with this instance
+     */
+    void setData(const DrmBuffer& drmBuffer);
+
+private:
+    DrmInfoEvent(const DrmInfoEvent& ref);
+    const DrmInfoEvent& operator=(const DrmInfoEvent& ref);
+
 private:
     int mUniqueId;
     int mInfoType;
     const String8 mMessage;
+    KeyedVector<String8, String8> mAttributes;
+    DrmBuffer mDrmBuffer;
 };
 
 };