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      1 /*	$NetBSD: cprng.h,v 1.17 2020/04/30 03:28:19 riastradh Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2011-2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Thor Lancelot Simon and Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * XXX Don't change this to _SYS_CPRNG_H or anything -- code outside
     34  * this file relies on its name...  (I'm looking at you, ipf!)
     35  */
     36 #ifndef _CPRNG_H
     37 #define _CPRNG_H
     38 
     39 #include <sys/types.h>
     40 
     41 #include <crypto/nist_hash_drbg/nist_hash_drbg.h>
     42 #include <crypto/cprng_fast/cprng_fast.h>
     43 
     44 #define CPRNG_MAX_LEN	NIST_HASH_DRBG_MAX_REQUEST_BYTES
     45 
     46 typedef struct cprng_strong cprng_strong_t;
     47 
     48 void	cprng_init(void);
     49 
     50 #define CPRNG_INIT_ANY		0x00000001
     51 #define CPRNG_REKEY_ANY		0x00000002
     52 #define CPRNG_USE_CV		0x00000004
     53 #define CPRNG_HARD		0x00000008
     54 #define CPRNG_FMT	"\177\020\
     55 b\0INIT_ANY\0\
     56 b\1REKEY_ANY\0\
     57 b\2USE_CV\0\
     58 b\3HARD\0"
     59 
     60 cprng_strong_t *
     61 	cprng_strong_create(const char *, int, int);
     62 void	cprng_strong_destroy(cprng_strong_t *);
     63 size_t	cprng_strong(cprng_strong_t *, void *, size_t, int);
     64 
     65 extern cprng_strong_t	*kern_cprng; /* IPL_VM */
     66 extern cprng_strong_t	*user_cprng; /* IPL_NONE, thread context only */
     67 
     68 uint32_t cprng_strong32(void);
     69 uint64_t cprng_strong64(void);
     70 
     71 #endif	/* _CPRNG_H */
     72