1 /*- 2 * Copyright (c) 2000-2013 Mark R. V. Murray 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _SYS_RANDOM_H_ 30 #define _SYS_RANDOM_H_ 31 32 #ifdef _KERNEL 33 34 u_int read_random(void *, u_int); 35 36 /* 37 * Note: if you add or remove members of random_entropy_source, remember to also update the 38 * KASSERT regarding what valid members are in random_harvest_internal(), and remember the 39 * strings in the static array random_source_descr[] in random_harvestq.c. 40 * 41 * NOTE: complain loudly to markm@ or on the lists if this enum gets more than 32 42 * distinct values (0-31)! ENTROPYSOURCE may be == 32, but not > 32. 43 */ 44 enum random_entropy_source { 45 RANDOM_START = 0, 46 RANDOM_CACHED = 0, 47 /* Environmental sources */ 48 RANDOM_ATTACH, 49 RANDOM_KEYBOARD, 50 RANDOM_MOUSE, 51 RANDOM_NET_TUN, 52 RANDOM_NET_ETHER, 53 RANDOM_NET_NG, 54 RANDOM_INTERRUPT, 55 RANDOM_SWI, 56 RANDOM_FS_ATIME, 57 RANDOM_FAST, /* Special!! Miscellaneous high performance stuff, like UMA/SLAB Allocator */ 58 RANDOM_ENVIRONMENTAL_END = RANDOM_FAST, 59 /* Fast hardware random-number sources from here on. */ 60 RANDOM_PURE_OCTEON, 61 RANDOM_PURE_SAFE, 62 RANDOM_PURE_GLXSB, 63 RANDOM_PURE_UBSEC, 64 RANDOM_PURE_HIFN, 65 RANDOM_PURE_RDRAND, 66 RANDOM_PURE_NEHEMIAH, 67 RANDOM_PURE_RNDTEST, 68 RANDOM_PURE_VIRTIO, 69 ENTROPYSOURCE 70 }; 71 72 #define RANDOM_HARVEST_EVERYTHING_MASK ((1 << (RANDOM_ENVIRONMENTAL_END + 1)) - 1) 73 74 #if defined(RANDOM_DUMMY) 75 #define random_harvest_queue(a, b, c, d) do {} while (0) 76 #define random_harvest_fast(a, b, c, d) do {} while (0) 77 #define random_harvest_direct(a, b, c, d) do {} while (0) 78 #else /* !defined(RANDOM_DUMMY) */ 79 void random_harvest_queue(const void *, u_int, u_int, enum random_entropy_source); 80 void random_harvest_fast(const void *, u_int, u_int, enum random_entropy_source); 81 void random_harvest_direct(const void *, u_int, u_int, enum random_entropy_source); 82 #endif /* defined(RANDOM_DUMMY) */ 83 84 #endif /* _KERNEL */ 85 86 #endif /* _SYS_RANDOM_H_ */ 87