randomdev.c (13774e82285e8d5eb3afeff63760725f747f8581) randomdev.c (f3d2512db6ec23985b10fbcbe0b3bd34ea2574df)
1/*-
2 * Copyright (c) 2017 Oliver Pinter
3 * Copyright (c) 2000-2015 Mark R V Murray
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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57#include <dev/random/randomdev.h>
58#include <dev/random/random_harvestq.h>
59
60#define RANDOM_UNIT 0
61
62#if defined(RANDOM_LOADABLE)
63#define READ_RANDOM_UIO _read_random_uio
64#define READ_RANDOM _read_random
1/*-
2 * Copyright (c) 2017 Oliver Pinter
3 * Copyright (c) 2000-2015 Mark R V Murray
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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57#include <dev/random/randomdev.h>
58#include <dev/random/random_harvestq.h>
59
60#define RANDOM_UNIT 0
61
62#if defined(RANDOM_LOADABLE)
63#define READ_RANDOM_UIO _read_random_uio
64#define READ_RANDOM _read_random
65#define IS_RANDOM_SEEDED _is_random_seeded
65static int READ_RANDOM_UIO(struct uio *, bool);
66static void READ_RANDOM(void *, u_int);
66static int READ_RANDOM_UIO(struct uio *, bool);
67static void READ_RANDOM(void *, u_int);
68static bool IS_RANDOM_SEEDED(void);
67#else
68#define READ_RANDOM_UIO read_random_uio
69#define READ_RANDOM read_random
69#else
70#define READ_RANDOM_UIO read_random_uio
71#define READ_RANDOM read_random
72#define IS_RANDOM_SEEDED is_random_seeded
70#endif
71
72static d_read_t randomdev_read;
73static d_write_t randomdev_write;
74static d_poll_t randomdev_poll;
75static d_ioctl_t randomdev_ioctl;
76
77static struct cdevsw random_cdevsw = {

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88
89static void
90random_alg_context_ra_init_alg(void *data)
91{
92
93 p_random_alg_context = &random_alg_context;
94 p_random_alg_context->ra_init_alg(data);
95#if defined(RANDOM_LOADABLE)
73#endif
74
75static d_read_t randomdev_read;
76static d_write_t randomdev_write;
77static d_poll_t randomdev_poll;
78static d_ioctl_t randomdev_ioctl;
79
80static struct cdevsw random_cdevsw = {

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91
92static void
93random_alg_context_ra_init_alg(void *data)
94{
95
96 p_random_alg_context = &random_alg_context;
97 p_random_alg_context->ra_init_alg(data);
98#if defined(RANDOM_LOADABLE)
96 random_infra_init(READ_RANDOM_UIO, READ_RANDOM);
99 random_infra_init(READ_RANDOM_UIO, READ_RANDOM, IS_RANDOM_SEEDED);
97#endif
98}
99
100static void
101random_alg_context_ra_deinit_alg(void *data)
102{
103
104#if defined(RANDOM_LOADABLE)

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266 sizeof(remainder_buf));
267 memcpy((char *)random_buf + read_directly_len, remainder_buf,
268 len - read_directly_len);
269
270 explicit_bzero(remainder_buf, sizeof(remainder_buf));
271 }
272}
273
100#endif
101}
102
103static void
104random_alg_context_ra_deinit_alg(void *data)
105{
106
107#if defined(RANDOM_LOADABLE)

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269 sizeof(remainder_buf));
270 memcpy((char *)random_buf + read_directly_len, remainder_buf,
271 len - read_directly_len);
272
273 explicit_bzero(remainder_buf, sizeof(remainder_buf));
274 }
275}
276
277bool
278IS_RANDOM_SEEDED(void)
279{
280 return (p_random_alg_context->ra_seeded());
281}
282
274static __inline void
275randomdev_accumulate(uint8_t *buf, u_int count)
276{
277 static u_int destination = 0;
278 static struct harvest_event event;
279 static struct randomdev_hash hash;
280 static uint32_t entropy_data[RANDOM_KEYSIZE_WORDS];
281 uint32_t timestamp;

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284randomdev_accumulate(uint8_t *buf, u_int count)
285{
286 static u_int destination = 0;
287 static struct harvest_event event;
288 static struct randomdev_hash hash;
289 static uint32_t entropy_data[RANDOM_KEYSIZE_WORDS];
290 uint32_t timestamp;

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