#include <libkern/crypto/rand.h>

libkern/crypto/rand.h Kernel.framework

5 typedefs · 1 macro · 1 function

typedefcrypto_random_ctx_t

A handle to a random generator suitable for use with crypto_random_generate.

typedef void *crypto_random_ctx_t

macroCRYPTO_RANDOM_MAX_CTX_SIZE

The maximum size (in bytes) of a random generator.

#define CRYPTO_RANDOM_MAX_CTX_SIZE ((size_t)256)

typedefcrypto_random_generate_fn_t

typedef void (*)(crypto_random_ctx_t, void *, size_t) crypto_random_generate_fn_t;

typedefcrypto_random_uniform_fn_t

typedef void (*)(crypto_random_ctx_t, uint64_t, uint64_t *) crypto_random_uniform_fn_t;

typedefcrypto_random_kmem_ctx_size_fn_t

typedef size_t (*crypto_random_kmem_ctx_size_fn_t)(void)

typedefcrypto_random_kmem_init_fn_t

typedef void (*)(crypto_random_ctx_t) crypto_random_kmem_init_fn_t;

functionrandom_buf

int random_buf(void *buf, size_t buflen)

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claude-fable-5, 2026-08-24 · not from Apple sources · verified against xnu libkern/crypto/corecrypto_rand.c

Fills buf with buflen bytes from the kernel's cryptographic random number generator (corecrypto cc_rand_generate). Returns 0 on success or a nonzero corecrypto error status. Suitable for keys and other security-sensitive material; see also read_random.