_pkinit_req_context
typedef struct _pkinit_req_context *pkinit_req_context;
struct _pkinit_req_context *reqctx = NULL;
reqctx = (struct _pkinit_req_context *) malloc(sizeof(*reqctx));
struct _pkinit_req_context *reqctx =
(struct _pkinit_req_context *)request_context;