mirror of https://github.com/hak5/openwrt-owl.git
301 lines
7.9 KiB
C
301 lines
7.9 KiB
C
/* $OpenBSD$ */
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|