bits_getbuf
raw = bits_getbuf(p->key);
bits_getbuf(key), BITS2BYTES(bits_len(key)),
bits_getbuf(info), BITS2BYTES(bits_len(info)))) {
bits_getbuf(kg->kg_salt), BITS2BYTES(bits_len(kg->kg_salt)),
bits_getbuf(kg->kg_salt),
ci.ci_key = bits_getbuf(p->key);
const void *bits_getbuf(bits_t *);