Passing C++ struct to enclave from app in Intel SGX

Question

I have a C++ struct like this:

struct node                                                 
{
    string splitOn;                                         
    st         


        

Answer 1

You shouldn't do this:

struct node                                                 
{
    string splitOn;                                         
    string label;                                           
    bool isLeaf;                                            
    vector<string> childrenValues;                          
    vector<node*> children;                                 
};

Possible problems:

• The STL does not guarantee binary compatibility on most of its types: i.e. std::string or std::vector.

• SGX's implementation of the STL is just a modified/reduced subset of it.

• You may face problems related to memory alignment.

You should implement custom serialization for this instead.