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build.sh
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darn.c
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fenestrasX
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fortuna.c
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fortuna.h
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hash.c
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hash.h
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ivy.c
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nehemiah.c
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other_algorithm.c
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other_algorithm.h
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random_harvestq.c
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random_harvestq.h
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random_infra.c
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randomdev.c
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randomdev.h
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uint128.h
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unit_test.c
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unit_test.h
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Editing: darn.c
/*- * Copyright (c) 2018 Justin Hibbits * Copyright (c) 2013 The FreeBSD Foundation * Copyright (c) 2013 David E. O'Brien <obrien@NUXI.org> * Copyright (c) 2012 Konstantin Belousov <kib@FreeBSD.org> * All rights reserved. * * Portions of this software were developed by Konstantin Belousov * under sponsorship from the FreeBSD Foundation. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer * in this position and unchanged. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/kernel.h> #include <sys/conf.h> #include <sys/lock.h> #include <sys/malloc.h> #include <sys/module.h> #include <sys/random.h> #include <sys/systm.h> #include <machine/cpu.h> #include <machine/md_var.h> #include <dev/random/randomdev.h> /* * Power ISA 3.0 adds a "darn" instruction (Deliver A Random Number). The RNG * backing this instruction conforms to NIST SP800-90B and SP800-90C at the * point of hardware design, and provides a minimum of 0.5 bits of entropy per * bit. */ #define RETRY_COUNT 10 static u_int random_darn_read(void *, u_int); static struct random_source random_darn = { .rs_ident = "PowerISA DARN random number generator", .rs_source = RANDOM_PURE_DARN, .rs_read = random_darn_read }; static inline int darn_rng_store(u_long *buf) { u_long rndval; int retry; for (retry = RETRY_COUNT; retry > 0; --retry) { /* "DARN %rN, 1" instruction */ /* * Arguments for DARN: rN and "L", where "L" can be one of: * 0 - 32-bit conditional random number * 1 - Conditional random number (conditioned to remove bias) * 2 - Raw random number (unprocessed, may include bias) * 3 - Reserved */ __asm __volatile(".long 0x7c0105e6 | (%0 << 21)" : "+r"(rndval)); if (rndval != ~0) break; } *buf = rndval; return (retry); } /* It is required that buf length is a multiple of sizeof(u_long). */ static u_int random_darn_read(void *buf, u_int c) { u_long *b, rndval; u_int count; KASSERT(c % sizeof(*b) == 0, ("partial read %d", c)); b = buf; for (count = c; count > 0; count -= sizeof(*b)) { if (darn_rng_store(&rndval) == 0) break; *b++ = rndval; } return (c - count); } static int darn_modevent(module_t mod, int type, void *unused) { int error = 0; switch (type) { case MOD_LOAD: if (cpu_features2 & PPC_FEATURE2_DARN) { random_source_register(&random_darn); printf("random: fast provider: \"%s\"\n", random_darn.rs_ident); } break; case MOD_UNLOAD: if (cpu_features2 & PPC_FEATURE2_DARN) random_source_deregister(&random_darn); break; case MOD_SHUTDOWN: break; default: error = EOPNOTSUPP; break; } return (error); } static moduledata_t darn_mod = { "darn", darn_modevent, 0 }; DECLARE_MODULE(darn, darn_mod, SI_SUB_RANDOM, SI_ORDER_FOURTH); MODULE_VERSION(darn, 1); MODULE_DEPEND(darn, random_harvestq, 1, 1, 1);
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