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https://github.com/GrapheneOS/hardened_malloc.git
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0cada13b78
Signed-off-by: Tavi <tavi@divested.dev> Co-authored-by: =?UTF-8?q?Christian=20G=C3=B6ttsche?= <cgzones@googlemail.com>
31 lines
873 B
C
31 lines
873 B
C
#ifndef RANDOM_H
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#define RANDOM_H
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#include "chacha.h"
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#include "util.h"
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#define RANDOM_CACHE_SIZE 256U
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#define RANDOM_RESEED_SIZE (256U * 1024)
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struct random_state {
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unsigned index;
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unsigned reseed;
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chacha_ctx ctx;
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u8 cache[RANDOM_CACHE_SIZE];
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};
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void random_state_init(struct random_state *state);
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void random_state_init_from_random_state(struct random_state *state, struct random_state *source);
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void get_random_bytes(struct random_state *state, void *buf, size_t size);
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u16 get_random_u16(struct random_state *state);
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u16 get_random_u16_uniform(struct random_state *state, u16 bound);
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u64 get_random_u64(struct random_state *state);
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u64 get_random_u64_uniform(struct random_state *state, u64 bound);
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#if CONFIG_BLOCK_OPS_CHECK_SIZE && !defined(HAS_ARM_MTE)
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#define h_memcpy_internal musl_memcpy
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#else
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#define h_memcpy_internal memcpy
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#endif
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#endif
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