1 /* 2 * Copyright (c) 2019 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 #ifndef _PRNG_RANDOM_H_ 30 #define _PRNG_RANDOM_H_ 31 32 __BEGIN_DECLS 33 34 #include <corecrypto/cckprng.h> 35 36 #ifdef XNU_KERNEL_PRIVATE 37 38 void random_cpu_init(int cpu); 39 40 #endif /* XNU_KERNEL_PRIVATE */ 41 42 void register_and_init_prng(struct cckprng_ctx *ctx, const struct cckprng_funcs *funcs); 43 44 #include <kern/simple_lock.h> 45 /* Definitions for boolean PRNG */ 46 #define RANDOM_BOOL_GEN_SEED_COUNT 4 47 struct bool_gen { 48 unsigned int seed[RANDOM_BOOL_GEN_SEED_COUNT]; 49 unsigned int state; 50 decl_simple_lock_data(, lock); 51 }; 52 53 extern void random_bool_init(struct bool_gen * bg); 54 55 extern void random_bool_gen_entropy(struct bool_gen * bg, unsigned int * buffer, int count); 56 57 extern unsigned int random_bool_gen_bits(struct bool_gen * bg, unsigned int * buffer, unsigned int count, unsigned int numbits); 58 59 __END_DECLS 60 61 #endif /* _PRNG_RANDOM_H_ */ 62