1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 /* 26 * Copyright (c) 2018, Joyent, Inc. 27 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 28 */ 29 30 #ifndef _SYS_RANDOM_H 31 #define _SYS_RANDOM_H 32 33 #include <sys/types.h> 34 #include <sys/atomic.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 /* stats for the random number devices, /dev/random and /dev/urandom. */ 41 typedef struct rnd_stats { 42 uint64_t rs_rndOut; /* Bytes generated for /dev/random */ 43 uint64_t rs_rndcOut; /* Bytes read from /dev/random cache */ 44 uint64_t rs_urndOut; /* Bytes generated for /dev/urandom */ 45 } rnd_stats_t; 46 47 /* stats for the kernel random number provider, swrand. */ 48 typedef struct swrand_stats { 49 uint32_t ss_entEst; /* Entropy estimate in bits */ 50 uint64_t ss_entIn; /* Entropy bits added to pool */ 51 uint64_t ss_entOut; /* Entropy bits extracted from pool */ 52 uint64_t ss_bytesIn; /* Total data bytes added to pool */ 53 uint64_t ss_bytesOut; /* Total data bytes extracted from */ 54 /* the pool */ 55 } swrand_stats_t; 56 57 #if defined(_KERNEL) || defined(_FAKE_KERNEL) 58 59 #define BUMP_CPU_RND_STATS(rm, x, v) (((rm)->rm_mag.rm_stats).x += (v)) 60 #define BUMP_RND_STATS(x, v) atomic_add_64(&(rnd_stats).x, (v)) 61 #define BUMP_SWRAND_STATS(x, v) atomic_add_64(&(swrand_stats).x, (v)) 62 63 extern int random_add_entropy(uint8_t *, size_t, uint_t); 64 extern int random_get_bytes(uint8_t *, size_t); 65 extern int random_get_blocking_bytes(uint8_t *, size_t); 66 extern int random_get_pseudo_bytes(uint8_t *, size_t); 67 68 #endif /* _KERNEL */ 69 70 /* 71 * Flags for the getrandom(2) system call. 72 */ 73 #define GRND_NONBLOCK 0x0001 /* O_NONBLOCK equiv */ 74 #define GRND_RANDOM 0x0002 /* Use /dev/random, not /dev/urandom */ 75 extern ssize_t getrandom(void *, size_t, unsigned int); 76 77 #ifdef __cplusplus 78 } 79 #endif 80 81 #endif /* _SYS_RANDOM_H */ 82