diff options
Diffstat (limited to 'sys/dev/random/randomdev.h')
| -rw-r--r-- | sys/dev/random/randomdev.h | 86 |
1 files changed, 66 insertions, 20 deletions
diff --git a/sys/dev/random/randomdev.h b/sys/dev/random/randomdev.h index 4ca88ff..0af741f 100644 --- a/sys/dev/random/randomdev.h +++ b/sys/dev/random/randomdev.h @@ -1,5 +1,5 @@ /*- - * Copyright (c) 2000-2013 Mark R V Murray + * Copyright (c) 2000-2015 Mark R V Murray * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -27,41 +27,87 @@ */ #ifndef SYS_DEV_RANDOM_RANDOMDEV_H_INCLUDED -#define SYS_DEV_RANDOM_RANDOMDEV_H_INCLUDED +#define SYS_DEV_RANDOM_RANDOMDEV_H_INCLUDED /* This header contains only those definitions that are global * and non algorithm-specific for the entropy processor */ -typedef void random_init_func_t(void); -typedef void random_deinit_func_t(void); - -void randomdev_init_harvester(void (*)(const void *, u_int, u_int, enum random_entropy_source)); -void randomdev_init_reader(void (*)(uint8_t *, u_int)); -void randomdev_deinit_harvester(void); -void randomdev_deinit_reader(void); - -/* Stub/fake routines for when no entropy processor is loaded */ -extern void dummy_random_read_phony(uint8_t *, u_int); - -/* kern.random sysctls */ #ifdef SYSCTL_DECL /* from sysctl.h */ SYSCTL_DECL(_kern_random); -/* If this was C++, the macro below would be a template */ -#define RANDOM_CHECK_UINT(name, min, max) \ +#define RANDOM_CHECK_UINT(name, min, max) \ static int \ random_check_uint_##name(SYSCTL_HANDLER_ARGS) \ { \ if (oidp->oid_arg1 != NULL) { \ - if (*(u_int *)(oidp->oid_arg1) <= (min)) \ + if (*(u_int *)(oidp->oid_arg1) <= (min)) \ *(u_int *)(oidp->oid_arg1) = (min); \ - else if (*(u_int *)(oidp->oid_arg1) > (max)) \ + else if (*(u_int *)(oidp->oid_arg1) > (max)) \ *(u_int *)(oidp->oid_arg1) = (max); \ } \ - return (sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, \ + return (sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2, \ req)); \ } #endif /* SYSCTL_DECL */ -#endif +MALLOC_DECLARE(M_ENTROPY); + +#define RANDOM_ALG_READ_RATE_MINIMUM 32 + +struct harvest_event; + +typedef void random_alg_pre_read_t(void); +typedef void random_alg_read_t(uint8_t *, u_int); +typedef void random_alg_post_read_t(void); +typedef void random_alg_write_t(uint8_t *, u_int); +typedef int random_alg_seeded_t(void); +typedef void random_alg_reseed_t(void); +typedef void random_alg_eventprocessor_t(struct harvest_event *); + +typedef u_int random_source_read_t(void *, u_int); + +/* + * Random Algorithm is a processor of randomness for the kernel + * and for userland. + */ +struct random_algorithm { + const char *ra_ident; + u_int ra_poolcount; + random_alg_pre_read_t *ra_pre_read; + random_alg_read_t *ra_read; + random_alg_post_read_t *ra_post_read; + random_alg_write_t *ra_write; + random_alg_reseed_t *ra_reseed; + random_alg_seeded_t *ra_seeded; + random_alg_eventprocessor_t *ra_event_processor; +}; + +extern struct random_algorithm random_alg_context; + +/* + * Random Source is a source of entropy that can provide + * specified or approximate amount of entropy immediately + * upon request. + */ +struct random_source { + const char *rs_ident; + enum random_entropy_source rs_source; + random_source_read_t *rs_read; +}; + +#if !defined(RANDOM_DUMMY) +struct random_sources { + LIST_ENTRY(random_sources) rrs_entries; + struct random_source *rrs_source; +}; +#endif /* !defined(RANDOM_DUMMY) */ + +void random_source_register(struct random_source *); +void random_source_deregister(struct random_source *); + +void random_sources_feed(void); + +void randomdev_unblock(void); + +#endif /* SYS_DEV_RANDOM_RANDOMDEV_H_INCLUDED */ |
