Function crypto_copydata

freebsd/opencrypto/criov.c:629–659

}

void
crypto_copydata(struct cryptop *crp, int off, int size, void *dst)
{

	switch (crp->crp_buf.cb_type) {
	case CRYPTO_BUF_MBUF:
		m_copydata(crp->crp_buf.cb_mbuf, off, size, dst);
		break;
#if CRYPTO_MAY_HAVE_VMPAGE
	case CRYPTO_BUF_VMPAGE:
		MPASS(size <= crp->crp_buf.cb_vm_page_len);
		MPASS(size + off <= crp->crp_buf.cb_vm_page_len +
		    crp->crp_buf.cb_vm_page_offset);
		cvm_page_copydata(crp->crp_buf.cb_vm_page,
		    off + crp->crp_buf.cb_vm_page_offset, size, dst);
		break;
#endif /* CRYPTO_MAY_HAVE_VMPAGE */
	case CRYPTO_BUF_UIO:
		cuio_copydata(crp->crp_buf.cb_uio, off, size, dst);
		break;
	case CRYPTO_BUF_CONTIG:
		MPASS(off + size <= crp->crp_buf.cb_buf_len);
		bcopy(crp->crp_buf.cb_buf + off, dst, size);
		break;
	default:
#ifdef INVARIANTS
		panic("invalid crp buf type %d", crp->crp_buf.cb_type);
#endif
		break;
	}
}

int
crypto_apply_buf(struct crypto_buffer *cb, int off, int len,