struct SilcSKEStruct { ... };

    This structure is the SKE session context, and has a type definition
    to SilcSKE. The structure includes the network connection socket,
    securit properties collected during the SKE negotiation, payloads
    sent and received during the negotiation, and the actual raw key
    material too. The application usually does not need to reference
    to the inside of this structure.  However, checking the current
    status of the session can easily be checked with ske->status.

    struct SilcSKEStruct {
      /* The connection object. This is initialized by the caller. */
      SilcSocketConnection sock;
    
      /* Security properties negotiated */
      SilcSKESecurityProperties prop;
    
      /* Key Exchange payloads filled during key negotiation with
         remote data. Responder may save local data here as well. */
      SilcSKEStartPayload *start_payload;
      SilcSKEKEPayload *ke1_payload;
      SilcSKEKEPayload *ke2_payload;
      unsigned char *remote_version;
    
      /* Temporary copy of the KE Start Payload used in the
         HASH computation. */
      SilcBuffer start_payload_copy;
    
      /* Random number x, 1 < x < q. This is the secret exponent
         used in Diffie Hellman computations. */
      SilcMPInt *x;
      
      /* The secret shared key */
      SilcMPInt *KEY;
    
      /* The hash value HASH of the key exchange */
      unsigned char *hash;
      SilcUInt32 hash_len;
    
      /* Random Number Generator. This is set by the caller and must
         be free'd by the caller. */
      SilcRng rng;
    
      /* Pointer to the what ever user data. This is set by the caller
         and is not touched by the SKE. The caller must also free this one. */
      void *user_data;
    
      /* Current status of SKE */
      SilcSKEStatus status;
    
      /* Reference counter. This is used when SKE library is performing async
         operations, like public key verification. */
      int users;
    
      /* SKE callbacks. */
      SilcSKECallbacks callbacks;
    
      /* Backwards support version indicator */
      SilcUInt32 backward_version;
    };