6c8f7fc3ba
. add all sys/sys headers not already present to help compiling . take netbsd dirent.h and struct dirent; main result is introducing d_type and d_namlen that have to be set by getdents() in all FS code implementing it . d_off is gone . alignment of the struct has become 8 bytes instead of 4 . remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE . libminlib: cleanup unused yet duplicate code . mfs: throw out the long-broken v1, v2 support . new test for dirent contents filled by getdents() Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
152 lines
3.8 KiB
C
152 lines
3.8 KiB
C
/* $NetBSD: cprng.h,v 1.5 2012/04/17 02:50:39 tls Exp $ */
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/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Thor Lancelot Simon.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _CPRNG_H
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#define _CPRNG_H
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#include <sys/types.h>
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#include <sys/fcntl.h>
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#include <lib/libkern/libkern.h>
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#include <sys/rnd.h>
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#include <crypto/nist_ctr_drbg/nist_ctr_drbg.h>
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#include <sys/condvar.h>
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#include <sys/select.h>
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/*
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* NIST SP800-90 says 2^19 bytes per request for the CTR_DRBG.
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*/
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#define CPRNG_MAX_LEN 524288
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#if !defined(_RUMPKERNEL) && !defined(_RUMP_NATIVE_ABI)
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/*
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* We do not want an arc4random() prototype available to anyone.
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*/
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void _arc4randbytes(void *, size_t);
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uint32_t _arc4random(void);
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static inline size_t
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cprng_fast(void *p, size_t len)
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{
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_arc4randbytes(p, len);
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return len;
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}
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static inline uint32_t
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cprng_fast32(void)
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{
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return _arc4random();
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}
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static inline uint64_t
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cprng_fast64(void)
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{
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uint64_t r;
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_arc4randbytes(&r, sizeof(r));
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return r;
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}
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#else
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size_t cprng_fast(void *, size_t);
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uint32_t cprng_fast32(void);
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uint64_t cprng_fast64(void);
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#endif
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typedef struct _cprng_strong {
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kmutex_t mtx;
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kcondvar_t cv;
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struct selinfo selq;
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NIST_CTR_DRBG drbg;
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int flags;
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char name[16];
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int reseed_pending;
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int entropy_serial;
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rndsink_t reseed;
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} cprng_strong_t;
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#define CPRNG_INIT_ANY 0x00000001
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#define CPRNG_REKEY_ANY 0x00000002
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#define CPRNG_USE_CV 0x00000004
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cprng_strong_t *cprng_strong_create(const char *const, int, int);
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size_t cprng_strong(cprng_strong_t *const, void *const, size_t, int);
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void cprng_strong_destroy(cprng_strong_t *);
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extern cprng_strong_t * kern_cprng;
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static inline uint32_t
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cprng_strong32(void)
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{
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uint32_t r;
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cprng_strong(kern_cprng, &r, sizeof(r), 0);
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return r;
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}
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static inline uint64_t
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cprng_strong64(void)
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{
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uint64_t r;
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cprng_strong(kern_cprng, &r, sizeof(r), 0);
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return r;
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}
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static inline int
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cprng_strong_ready(cprng_strong_t *c)
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{
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int ret = 0;
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mutex_enter(&c->mtx);
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if (c->drbg.reseed_counter < NIST_CTR_DRBG_RESEED_INTERVAL) {
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ret = 1;
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}
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mutex_exit(&c->mtx);
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return ret;
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}
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static inline void
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cprng_strong_deplete(cprng_strong_t *c)
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{
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mutex_enter(&c->mtx);
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c->drbg.reseed_counter = NIST_CTR_DRBG_RESEED_INTERVAL + 1;
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mutex_exit(&c->mtx);
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}
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static inline int
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cprng_strong_strength(cprng_strong_t *c)
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{
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return NIST_BLOCK_KEYLEN_BYTES;
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}
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void cprng_init(void);
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int cprng_strong_getflags(cprng_strong_t *const);
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void cprng_strong_setflags(cprng_strong_t *const, int);
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#endif
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