From 55944e5e40b1be2afc4855d8d2baf4b73d1876b5 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:49:52 +0200 Subject: Adding upstream version 255.4. Signed-off-by: Daniel Baumann --- src/basic/random-util.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 src/basic/random-util.h (limited to 'src/basic/random-util.h') diff --git a/src/basic/random-util.h b/src/basic/random-util.h new file mode 100644 index 0000000..b1a4d10 --- /dev/null +++ b/src/basic/random-util.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include +#include +#include + +void random_bytes(void *p, size_t n); /* Returns random bytes suitable for most uses, but may be insecure sometimes. */ +int crypto_random_bytes(void *p, size_t n); /* Returns secure random bytes after waiting for the RNG to initialize. */ + +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); + +uint64_t random_u64_range(uint64_t max); -- cgit v1.2.3