mirror of
https://github.com/morgan9e/systemd
synced 2026-04-14 16:37:19 +09:00
f102bc3e5f
Let's not leak details from src/shared and src/libsystemd into src/basic, even though you can't actually do anything useful with just forward declarations from src/shared. The sd-forward.h header is put in src/libsystemd/sd-common as we don't have a directory for shared internal headers for libsystemd yet. Let's also rename forward.h to basic-forward.h to keep things self-explanatory.
32 lines
1.0 KiB
C
32 lines
1.0 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
|
|
#pragma once
|
|
|
|
#include "basic-forward.h"
|
|
|
|
void random_bytes(void *p, size_t n) _nonnull_if_nonzero_(1, 2); /* Returns random bytes suitable for most uses, but may be insecure sometimes. */
|
|
int crypto_random_bytes(void *p, size_t n) _nonnull_if_nonzero_(1, 2); /* Returns secure random bytes after waiting for the RNG to initialize. */
|
|
int crypto_random_bytes_allocate_iovec(size_t n, struct iovec *ret);
|
|
|
|
static inline uint64_t random_u64(void) {
|
|
uint64_t u;
|
|
random_bytes(&u, sizeof(u));
|
|
return u;
|
|
}
|
|
|
|
static inline uint32_t random_u32(void) {
|
|
uint32_t u;
|
|
random_bytes(&u, sizeof(u));
|
|
return u;
|
|
}
|
|
|
|
/* Some limits on the pool sizes when we deal with the kernel random pool */
|
|
#define RANDOM_POOL_SIZE_MIN 32U
|
|
#define RANDOM_POOL_SIZE_MAX (10U*1024U*1024U)
|
|
#define RANDOM_EFI_SEED_SIZE 32U
|
|
|
|
size_t random_pool_size(void);
|
|
|
|
int random_write_entropy(int fd, const void *seed, size_t size, bool credit) _nonnull_if_nonzero_(2, 3);
|
|
|
|
uint64_t random_u64_range(uint64_t max);
|