sshbuf_load_fd
if ((r = sshbuf_load_fd(fd, &buffer)) != 0 ||
if ((r = sshbuf_load_fd(fd, &buffer)) != 0 ||
if ((r = sshbuf_load_fd(fd, &keyblob)) != 0) {
if ((r = sshbuf_load_fd(fd, bufp)) != 0)
int sshbuf_load_fd(int, struct sshbuf **)