// From emacs
typedef int md5_uint32;

struct md5_ctx
{
  md5_uint32 A;
  md5_uint32 B;
  md5_uint32 C;
  md5_uint32 D;

  md5_uint32 total[2];
  md5_uint32 buflen;
  char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32))));
};