osfmk/prng/random.h

   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_ */