174072Smarkm/*- 2284959Smarkm * Copyright (c) 2000-2015 Mark R V Murray 374072Smarkm * All rights reserved. 474072Smarkm * 574072Smarkm * Redistribution and use in source and binary forms, with or without 674072Smarkm * modification, are permitted provided that the following conditions 774072Smarkm * are met: 874072Smarkm * 1. Redistributions of source code must retain the above copyright 974072Smarkm * notice, this list of conditions and the following disclaimer 1074072Smarkm * in this position and unchanged. 1174072Smarkm * 2. Redistributions in binary form must reproduce the above copyright 1274072Smarkm * notice, this list of conditions and the following disclaimer in the 1374072Smarkm * documentation and/or other materials provided with the distribution. 1474072Smarkm * 1574072Smarkm * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1674072Smarkm * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1774072Smarkm * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1874072Smarkm * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 1974072Smarkm * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2074072Smarkm * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2174072Smarkm * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2274072Smarkm * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2374072Smarkm * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2474072Smarkm * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2574072Smarkm * 2674072Smarkm * $FreeBSD: releng/11.0/sys/dev/random/randomdev.h 286839 2015-08-17 07:36:12Z markm $ 2774072Smarkm */ 2874072Smarkm 29256377Smarkm#ifndef SYS_DEV_RANDOM_RANDOMDEV_H_INCLUDED 30284959Smarkm#define SYS_DEV_RANDOM_RANDOMDEV_H_INCLUDED 31256377Smarkm 32285422Smarkm#ifdef _KERNEL 33285422Smarkm 3474072Smarkm/* This header contains only those definitions that are global 3574072Smarkm * and non algorithm-specific for the entropy processor 3674072Smarkm */ 3774072Smarkm 38273872Smarkm#ifdef SYSCTL_DECL /* from sysctl.h */ 39273872SmarkmSYSCTL_DECL(_kern_random); 40273872Smarkm 41284959Smarkm#define RANDOM_CHECK_UINT(name, min, max) \ 42273872Smarkmstatic int \ 43273872Smarkmrandom_check_uint_##name(SYSCTL_HANDLER_ARGS) \ 44273872Smarkm{ \ 45273872Smarkm if (oidp->oid_arg1 != NULL) { \ 46284959Smarkm if (*(u_int *)(oidp->oid_arg1) <= (min)) \ 47273872Smarkm *(u_int *)(oidp->oid_arg1) = (min); \ 48284959Smarkm else if (*(u_int *)(oidp->oid_arg1) > (max)) \ 49273872Smarkm *(u_int *)(oidp->oid_arg1) = (max); \ 50273872Smarkm } \ 51284959Smarkm return (sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, \ 52273872Smarkm req)); \ 53273872Smarkm} 54273872Smarkm#endif /* SYSCTL_DECL */ 55273872Smarkm 56284959SmarkmMALLOC_DECLARE(M_ENTROPY); 57284959Smarkm 58285422Smarkm#endif /* _KERNEL */ 59285422Smarkm 60284959Smarkmstruct harvest_event; 61284959Smarkm 62286839Smarkmtypedef void random_alg_init_t(void *); 63286839Smarkmtypedef void random_alg_deinit_t(void *); 64284959Smarkmtypedef void random_alg_pre_read_t(void); 65284959Smarkmtypedef void random_alg_read_t(uint8_t *, u_int); 66286839Smarkmtypedef bool random_alg_seeded_t(void); 67284959Smarkmtypedef void random_alg_reseed_t(void); 68284959Smarkmtypedef void random_alg_eventprocessor_t(struct harvest_event *); 69284959Smarkm 70284959Smarkmtypedef u_int random_source_read_t(void *, u_int); 71284959Smarkm 72284959Smarkm/* 73284959Smarkm * Random Algorithm is a processor of randomness for the kernel 74284959Smarkm * and for userland. 75284959Smarkm */ 76284959Smarkmstruct random_algorithm { 77284959Smarkm const char *ra_ident; 78284959Smarkm u_int ra_poolcount; 79285422Smarkm void (*ra_init_alg)(void *); 80285422Smarkm void (*ra_deinit_alg)(void *); 81284959Smarkm random_alg_pre_read_t *ra_pre_read; 82284959Smarkm random_alg_read_t *ra_read; 83284959Smarkm random_alg_seeded_t *ra_seeded; 84284959Smarkm random_alg_eventprocessor_t *ra_event_processor; 85284959Smarkm}; 86284959Smarkm 87286839Smarkmextern struct random_algorithm random_alg_context, *p_random_alg_context; 88284959Smarkm 89285422Smarkm#ifdef _KERNEL 90285422Smarkm 91284959Smarkm/* 92284959Smarkm * Random Source is a source of entropy that can provide 93284959Smarkm * specified or approximate amount of entropy immediately 94284959Smarkm * upon request. 95284959Smarkm */ 96284959Smarkmstruct random_source { 97286839Smarkm const char *rs_ident; 98286839Smarkm enum random_entropy_source rs_source; 99286839Smarkm random_source_read_t *rs_read; 100284959Smarkm}; 101284959Smarkm 102284959Smarkmstruct random_sources { 103286839Smarkm LIST_ENTRY(random_sources) rrs_entries; 104286839Smarkm struct random_source *rrs_source; 105284959Smarkm}; 106284959Smarkm 107286839SmarkmLIST_HEAD(sources_head, random_sources); 108286839Smarkmextern struct sources_head source_list; 109286839Smarkm 110284959Smarkmvoid random_source_register(struct random_source *); 111284959Smarkmvoid random_source_deregister(struct random_source *); 112284959Smarkm 113286839Smarkm#if defined(RANDOM_LOADABLE) 114286839Smarkmextern struct sx randomdev_config_lock; 115286839Smarkm#define RANDOM_CONFIG_INIT_LOCK(x) sx_init(&randomdev_config_lock, "configuration change lock") 116286839Smarkm#define RANDOM_CONFIG_X_LOCK(x) sx_xlock(&randomdev_config_lock) 117286839Smarkm#define RANDOM_CONFIG_X_UNLOCK(x) sx_xunlock(&randomdev_config_lock) 118286839Smarkm#define RANDOM_CONFIG_S_LOCK(x) sx_slock(&randomdev_config_lock) 119286839Smarkm#define RANDOM_CONFIG_S_UNLOCK(x) sx_sunlock(&randomdev_config_lock) 120286839Smarkm#define RANDOM_CONFIG_DEINIT_LOCK(x) sx_destroy(&randomdev_config_lock) 121286839Smarkmvoid random_infra_init(int (*)(struct uio *, bool), u_int (*)(void *, u_int)); 122286839Smarkmvoid random_infra_uninit(void); 123286839Smarkm#endif 124284959Smarkm 125285422Smarkm#endif /* _KERNEL */ 126285422Smarkm 127284959Smarkmvoid randomdev_unblock(void); 128284959Smarkm 129284959Smarkm#endif /* SYS_DEV_RANDOM_RANDOMDEV_H_INCLUDED */ 130