C++ Buffer pains

I need a class (in C++11) which stores a couple of fields(including a buffer). I started with malloc() in a constructor and free() in a destructor (I didn't touch C/C++ for quite some time so that was all I remembered).

Next thing I remembered (because of crashes) that I need to implement a copy constructor and an assignment operator. Now, I have a full screen of code just for a class with 3 fields (one of which is the buffer).

A question.

What should I use? (I am dazzled by amount of choices - std::vector, std::array, std::shared_ptr, boost::scoped_ptr and may be something else).

Functionality for this buffer which I am looking for are:

• as little as possible memory management
• getting rid of these copy constructors and assignment operators
• ability to use it as void* (I have to pass it to functions which accept "void*")
• ability to access read/write it randomly (I may need to get a random range out of it and write a random range to it)
• allocate it on the heap (buffer can be reasonably large)
• preferably usage of some standard facility