+++ /dev/null
-/* $OpenBSD$ */
-
-/*
- * OCF/Linux port done by David McCullough <david_mccullough@mcafee.com>
- * Copyright (C) 2006-2010 David McCullough
- * Copyright (C) 2004-2005 Intel Corporation.
- * The license and original author are listed below.
- *
- * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
- * All rights reserved.
- *
- * 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.
- * 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.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Jason L. Wright
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * 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 <linux/version.h>
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) && !defined(AUTOCONF_INCLUDED)
-#include <linux/config.h>
-#endif
-#include <linux/module.h>
-#include <linux/list.h>
-#include <linux/wait.h>
-#include <linux/time.h>
-#include <linux/unistd.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/time.h>
-#include <cryptodev.h>
-#include "rndtest.h"
-
-static struct rndtest_stats rndstats;
-
-static void rndtest_test(struct rndtest_state *);
-
-/* The tests themselves */
-static int rndtest_monobit(struct rndtest_state *);
-static int rndtest_runs(struct rndtest_state *);
-static int rndtest_longruns(struct rndtest_state *);
-static int rndtest_chi_4(struct rndtest_state *);
-
-static int rndtest_runs_check(struct rndtest_state *, int, int *);
-static void rndtest_runs_record(struct rndtest_state *, int, int *);
-
-static const struct rndtest_testfunc {
- int (*test)(struct rndtest_state *);
-} rndtest_funcs[] = {
- { rndtest_monobit },
- { rndtest_runs },
- { rndtest_chi_4 },
- { rndtest_longruns },
-};
-
-#define RNDTEST_NTESTS (sizeof(rndtest_funcs)/sizeof(rndtest_funcs[0]))
-
-static void
-rndtest_test(struct rndtest_state *rsp)
-{
- int i, rv = 0;
-
- rndstats.rst_tests++;
- for (i = 0; i < RNDTEST_NTESTS; i++)
- rv |= (*rndtest_funcs[i].test)(rsp);
- rsp->rs_discard = (rv != 0);
-}
-
-
-extern int crypto_debug;
-#define rndtest_verbose 2
-#define rndtest_report(rsp, failure, fmt, a...) \
- { if (failure || crypto_debug) { printk("rng_test: " fmt "\n", a); } else; }
-
-#define RNDTEST_MONOBIT_MINONES 9725
-#define RNDTEST_MONOBIT_MAXONES 10275
-
-static int
-rndtest_monobit(struct rndtest_state *rsp)
-{
- int i, ones = 0, j;
- u_int8_t r;
-
- for (i = 0; i < RNDTEST_NBYTES; i++) {
- r = rsp->rs_buf[i];
- for (j = 0; j < 8; j++, r <<= 1)
- if (r & 0x80)
- ones++;
- }
- if (ones > RNDTEST_MONOBIT_MINONES &&
- ones < RNDTEST_MONOBIT_MAXONES) {
- if (rndtest_verbose > 1)
- rndtest_report(rsp, 0, "monobit pass (%d < %d < %d)",
- RNDTEST_MONOBIT_MINONES, ones,
- RNDTEST_MONOBIT_MAXONES);
- return (0);
- } else {
- if (rndtest_verbose)
- rndtest_report(rsp, 1,
- "monobit failed (%d ones)", ones);
- rndstats.rst_monobit++;
- return (-1);
- }
-}
-
-#define RNDTEST_RUNS_NINTERVAL 6
-
-static const struct rndtest_runs_tabs {
- u_int16_t min, max;
-} rndtest_runs_tab[] = {
- { 2343, 2657 },
- { 1135, 1365 },
- { 542, 708 },
- { 251, 373 },
- { 111, 201 },
- { 111, 201 },
-};
-
-static int
-rndtest_runs(struct rndtest_state *rsp)
-{
- int i, j, ones, zeros, rv = 0;
- int onei[RNDTEST_RUNS_NINTERVAL], zeroi[RNDTEST_RUNS_NINTERVAL];
- u_int8_t c;
-
- bzero(onei, sizeof(onei));
- bzero(zeroi, sizeof(zeroi));
- ones = zeros = 0;
- for (i = 0; i < RNDTEST_NBYTES; i++) {
- c = rsp->rs_buf[i];
- for (j = 0; j < 8; j++, c <<= 1) {
- if (c & 0x80) {
- ones++;
- rndtest_runs_record(rsp, zeros, zeroi);
- zeros = 0;
- } else {
- zeros++;
- rndtest_runs_record(rsp, ones, onei);
- ones = 0;
- }
- }
- }
- rndtest_runs_record(rsp, ones, onei);
- rndtest_runs_record(rsp, zeros, zeroi);
-
- rv |= rndtest_runs_check(rsp, 0, zeroi);
- rv |= rndtest_runs_check(rsp, 1, onei);
-
- if (rv)
- rndstats.rst_runs++;
-
- return (rv);
-}
-
-static void
-rndtest_runs_record(struct rndtest_state *rsp, int len, int *intrv)
-{
- if (len == 0)
- return;
- if (len > RNDTEST_RUNS_NINTERVAL)
- len = RNDTEST_RUNS_NINTERVAL;
- len -= 1;
- intrv[len]++;
-}
-
-static int
-rndtest_runs_check(struct rndtest_state *rsp, int val, int *src)
-{
- int i, rv = 0;
-
- for (i = 0; i < RNDTEST_RUNS_NINTERVAL; i++) {
- if (src[i] < rndtest_runs_tab[i].min ||
- src[i] > rndtest_runs_tab[i].max) {
- rndtest_report(rsp, 1,
- "%s interval %d failed (%d, %d-%d)",
- val ? "ones" : "zeros",
- i + 1, src[i], rndtest_runs_tab[i].min,
- rndtest_runs_tab[i].max);
- rv = -1;
- } else {
- rndtest_report(rsp, 0,
- "runs pass %s interval %d (%d < %d < %d)",
- val ? "ones" : "zeros",
- i + 1, rndtest_runs_tab[i].min, src[i],
- rndtest_runs_tab[i].max);
- }
- }
- return (rv);
-}
-
-static int
-rndtest_longruns(struct rndtest_state *rsp)
-{
- int i, j, ones = 0, zeros = 0, maxones = 0, maxzeros = 0;
- u_int8_t c;
-
- for (i = 0; i < RNDTEST_NBYTES; i++) {
- c = rsp->rs_buf[i];
- for (j = 0; j < 8; j++, c <<= 1) {
- if (c & 0x80) {
- zeros = 0;
- ones++;
- if (ones > maxones)
- maxones = ones;
- } else {
- ones = 0;
- zeros++;
- if (zeros > maxzeros)
- maxzeros = zeros;
- }
- }
- }
-
- if (maxones < 26 && maxzeros < 26) {
- rndtest_report(rsp, 0, "longruns pass (%d ones, %d zeros)",
- maxones, maxzeros);
- return (0);
- } else {
- rndtest_report(rsp, 1, "longruns fail (%d ones, %d zeros)",
- maxones, maxzeros);
- rndstats.rst_longruns++;
- return (-1);
- }
-}
-
-/*
- * chi^2 test over 4 bits: (this is called the poker test in FIPS 140-2,
- * but it is really the chi^2 test over 4 bits (the poker test as described
- * by Knuth vol 2 is something different, and I take him as authoritative
- * on nomenclature over NIST).
- */
-#define RNDTEST_CHI4_K 16
-#define RNDTEST_CHI4_K_MASK (RNDTEST_CHI4_K - 1)
-
-/*
- * The unnormalized values are used so that we don't have to worry about
- * fractional precision. The "real" value is found by:
- * (V - 1562500) * (16 / 5000) = Vn (where V is the unnormalized value)
- */
-#define RNDTEST_CHI4_VMIN 1563181 /* 2.1792 */
-#define RNDTEST_CHI4_VMAX 1576929 /* 46.1728 */
-
-static int
-rndtest_chi_4(struct rndtest_state *rsp)
-{
- unsigned int freq[RNDTEST_CHI4_K], i, sum;
-
- for (i = 0; i < RNDTEST_CHI4_K; i++)
- freq[i] = 0;
-
- /* Get number of occurances of each 4 bit pattern */
- for (i = 0; i < RNDTEST_NBYTES; i++) {
- freq[(rsp->rs_buf[i] >> 4) & RNDTEST_CHI4_K_MASK]++;
- freq[(rsp->rs_buf[i] >> 0) & RNDTEST_CHI4_K_MASK]++;
- }
-
- for (i = 0, sum = 0; i < RNDTEST_CHI4_K; i++)
- sum += freq[i] * freq[i];
-
- if (sum >= 1563181 && sum <= 1576929) {
- rndtest_report(rsp, 0, "chi^2(4): pass (sum %u)", sum);
- return (0);
- } else {
- rndtest_report(rsp, 1, "chi^2(4): failed (sum %u)", sum);
- rndstats.rst_chi++;
- return (-1);
- }
-}
-
-int
-rndtest_buf(unsigned char *buf)
-{
- struct rndtest_state rsp;
-
- memset(&rsp, 0, sizeof(rsp));
- rsp.rs_buf = buf;
- rndtest_test(&rsp);
- return(rsp.rs_discard);
-}
-
projects / openwrt / staging / chunkeey.git / blobdiff