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/*
Copyright 2011, 2016, 2018 Free Software Foundation, Inc.
This file is part of the GNU MP Library test suite.
The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
The GNU MP Library test suite is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
Public License for more details.
You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#ifdef __unix__
# include <unistd.h>
# include <sys/time.h>
#endif
#include "gmp.h"
#include "hex-random.h"
/* FIXME: gmp-impl.h included only for mpz_lucas_mod */
/* #include "gmp-impl.h" */
#if defined (__cplusplus)
extern "C" {
#endif
#define mpz_lucas_mod __gmpz_lucas_mod
__GMP_DECLSPEC int mpz_lucas_mod (mpz_ptr, mpz_ptr, long, mp_bitcnt_t, mpz_srcptr, mpz_ptr, mpz_ptr);
#if defined (__cplusplus)
}
#endif
static gmp_randstate_t state;
static void
mkseed (mpz_t seed)
{
FILE *f = fopen ("/dev/urandom", "rb");
if (f)
{
unsigned char buf[6];
size_t res;
setbuf (f, NULL);
res = fread (buf, sizeof(buf), 1, f);
fclose (f);
if (res == 1)
{
mpz_import (seed, sizeof(buf), 1, 1, 0, 0, buf);
return;
}
}
#ifdef __unix__
{
struct timeval tv;
mpz_t usec;
mpz_init (usec);
gettimeofday (&tv, NULL);
mpz_set_ui (seed, tv.tv_sec);
mpz_set_ui (usec, tv.tv_usec);
/* usec fits in 20 bits, shift left to make it 48 bits. */
mpz_mul_2exp (usec, usec, 28);
mpz_xor (seed, seed, usec);
mpz_clear (usec);
}
#else
mpz_set_ui (seed, time (NULL));
#endif
}
void
hex_random_init (void)
{
mpz_t seed;
char *env_seed;
mpz_init (seed);
env_seed = getenv ("GMP_CHECK_RANDOMIZE");
if (env_seed && env_seed[0])
{
mpz_set_str (seed, env_seed, 0);
if (mpz_cmp_ui (seed, 0) != 0)
gmp_printf ("Re-seeding with GMP_CHECK_RANDOMIZE=%Zd\n", seed);
else
{
mkseed (seed);
gmp_printf ("Seed GMP_CHECK_RANDOMIZE=%Zd (include this in bug reports)\n", seed);
}
fflush (stdout);
}
else
mpz_set_ui (seed, 4711);
gmp_randinit_default (state);
gmp_randseed (state, seed);
mpz_clear (seed);
}
char *
hex_urandomb (unsigned long bits)
{
char *res;
mpz_t x;
mpz_init (x);
mpz_urandomb (x, state, bits);
gmp_asprintf (&res, "%Zx", x);
mpz_clear (x);
return res;
}
char *
hex_rrandomb (unsigned long bits)
{
char *res;
mpz_t x;
mpz_init (x);
mpz_rrandomb (x, state, bits);
gmp_asprintf (&res, "%Zx", x);
mpz_clear (x);
return res;
}
char *
hex_rrandomb_export (void *dst, size_t *countp,
int order, size_t size, int endian, unsigned long bits)
{
char *res;
mpz_t x;
mpz_init (x);
mpz_rrandomb (x, state, bits);
gmp_asprintf (&res, "%Zx", x);
mpz_export (dst, countp, order, size, endian, 0, x);
mpz_clear (x);
return res;
}
void hex_random_op2 (enum hex_random_op op, unsigned long maxbits,
char **ap, char **rp)
{
mpz_t a, r;
unsigned long abits;
unsigned signs;
mpz_init (a);
mpz_init (r);
abits = gmp_urandomb_ui (state, 32) % maxbits;
mpz_rrandomb (a, state, abits);
signs = gmp_urandomb_ui (state, 1);
if (signs & 1)
mpz_neg (a, a);
switch (op)
{
default:
abort ();
case OP_SQR:
mpz_mul (r, a, a);
break;
}
gmp_asprintf (ap, "%Zx", a);
gmp_asprintf (rp, "%Zx", r);
mpz_clear (a);
mpz_clear (r);
}
void
hex_random_op3 (enum hex_random_op op, unsigned long maxbits,
char **ap, char **bp, char **rp)
{
mpz_t a, b, r;
unsigned long abits, bbits;
unsigned signs;
mpz_init (a);
mpz_init (b);
mpz_init (r);
abits = gmp_urandomb_ui (state, 32) % maxbits;
bbits = gmp_urandomb_ui (state, 32) % maxbits;
mpz_rrandomb (a, state, abits);
mpz_rrandomb (b, state, bbits);
signs = gmp_urandomb_ui (state, 3);
if (signs & 1)
mpz_neg (a, a);
if (signs & 2)
mpz_neg (b, b);
switch (op)
{
default:
abort ();
case OP_ADD:
mpz_add (r, a, b);
break;
case OP_SUB:
mpz_sub (r, a, b);
break;
case OP_MUL:
mpz_mul (r, a, b);
break;
case OP_GCD:
if (signs & 4)
{
/* Produce a large gcd */
unsigned long gbits = gmp_urandomb_ui (state, 32) % maxbits;
mpz_rrandomb (r, state, gbits);
mpz_mul (a, a, r);
mpz_mul (b, b, r);
}
mpz_gcd (r, a, b);
break;
case OP_LCM:
if (signs & 4)
{
/* Produce a large gcd */
unsigned long gbits = gmp_urandomb_ui (state, 32) % maxbits;
mpz_rrandomb (r, state, gbits);
mpz_mul (a, a, r);
mpz_mul (b, b, r);
}
mpz_lcm (r, a, b);
break;
case OP_AND:
mpz_and (r, a, b);
break;
case OP_IOR:
mpz_ior (r, a, b);
break;
case OP_XOR:
mpz_xor (r, a, b);
break;
}
gmp_asprintf (ap, "%Zx", a);
gmp_asprintf (bp, "%Zx", b);
gmp_asprintf (rp, "%Zx", r);
mpz_clear (a);
mpz_clear (b);
mpz_clear (r);
}
void
hex_random_op4 (enum hex_random_op op, unsigned long maxbits,
char **ap, char **bp, char **cp, char **dp)
{
mpz_t a, b, c, d;
unsigned long abits, bbits;
unsigned signs;
mpz_init (a);
mpz_init (b);
mpz_init (c);
mpz_init (d);
if (op == OP_POWM)
{
unsigned long cbits;
abits = gmp_urandomb_ui (state, 32) % maxbits;
bbits = 1 + gmp_urandomb_ui (state, 32) % maxbits;
cbits = 2 + gmp_urandomb_ui (state, 32) % maxbits;
mpz_rrandomb (a, state, abits);
mpz_rrandomb (b, state, bbits);
mpz_rrandomb (c, state, cbits);
signs = gmp_urandomb_ui (state, 3);
if (signs & 1)
mpz_neg (a, a);
if (signs & 2)
{
mpz_t g;
/* If we negate the exponent, must make sure that gcd(a, c) = 1 */
if (mpz_sgn (a) == 0)
mpz_set_ui (a, 1);
else
{
mpz_init (g);
for (;;)
{
mpz_gcd (g, a, c);
if (mpz_cmp_ui (g, 1) == 0)
break;
mpz_divexact (a, a, g);
}
mpz_clear (g);
}
mpz_neg (b, b);
}
if (signs & 4)
mpz_neg (c, c);
mpz_powm (d, a, b, c);
}
else
{
unsigned long qbits;
bbits = 1 + gmp_urandomb_ui (state, 32) % maxbits;
qbits = gmp_urandomb_ui (state, 32) % maxbits;
abits = bbits + qbits;
if (abits > 30)
abits -= 30;
else
abits = 0;
mpz_rrandomb (a, state, abits);
mpz_rrandomb (b, state, bbits);
signs = gmp_urandomb_ui (state, 2);
if (signs & 1)
mpz_neg (a, a);
if (signs & 2)
mpz_neg (b, b);
switch (op)
{
default:
abort ();
case OP_CDIV:
mpz_cdiv_qr (c, d, a, b);
break;
case OP_FDIV:
mpz_fdiv_qr (c, d, a, b);
break;
case OP_TDIV:
mpz_tdiv_qr (c, d, a, b);
break;
}
}
gmp_asprintf (ap, "%Zx", a);
gmp_asprintf (bp, "%Zx", b);
gmp_asprintf (cp, "%Zx", c);
gmp_asprintf (dp, "%Zx", d);
mpz_clear (a);
mpz_clear (b);
mpz_clear (c);
mpz_clear (d);
}
void
hex_random_bit_op (enum hex_random_op op, unsigned long maxbits,
char **ap, unsigned long *b, char **rp)
{
mpz_t a, r;
unsigned long abits, bbits;
unsigned signs;
mpz_init (a);
mpz_init (r);
abits = gmp_urandomb_ui (state, 32) % maxbits;
bbits = gmp_urandomb_ui (state, 32) % (maxbits + 100);
mpz_rrandomb (a, state, abits);
signs = gmp_urandomb_ui (state, 1);
if (signs & 1)
mpz_neg (a, a);
switch (op)
{
default:
abort ();
case OP_SETBIT:
mpz_set (r, a);
mpz_setbit (r, bbits);
break;
case OP_CLRBIT:
mpz_set (r, a);
mpz_clrbit (r, bbits);
break;
case OP_COMBIT:
mpz_set (r, a);
mpz_combit (r, bbits);
break;
case OP_CDIV_Q_2:
mpz_cdiv_q_2exp (r, a, bbits);
break;
case OP_CDIV_R_2:
mpz_cdiv_r_2exp (r, a, bbits);
break;
case OP_FDIV_Q_2:
mpz_fdiv_q_2exp (r, a, bbits);
break;
case OP_FDIV_R_2:
mpz_fdiv_r_2exp (r, a, bbits);
break;
case OP_TDIV_Q_2:
mpz_tdiv_q_2exp (r, a, bbits);
break;
case OP_TDIV_R_2:
mpz_tdiv_r_2exp (r, a, bbits);
break;
}
gmp_asprintf (ap, "%Zx", a);
*b = bbits;
gmp_asprintf (rp, "%Zx", r);
mpz_clear (a);
mpz_clear (r);
}
void
hex_random_scan_op (enum hex_random_op op, unsigned long maxbits,
char **ap, unsigned long *b, unsigned long *r)
{
mpz_t a;
unsigned long abits, bbits;
unsigned signs;
mpz_init (a);
abits = gmp_urandomb_ui (state, 32) % maxbits;
bbits = gmp_urandomb_ui (state, 32) % (maxbits + 100);
mpz_rrandomb (a, state, abits);
signs = gmp_urandomb_ui (state, 1);
if (signs & 1)
mpz_neg (a, a);
switch (op)
{
default:
abort ();
case OP_SCAN0:
*r = mpz_scan0 (a, bbits);
break;
case OP_SCAN1:
*r = mpz_scan1 (a, bbits);
break;
}
gmp_asprintf (ap, "%Zx", a);
*b = bbits;
mpz_clear (a);
}
void
hex_random_str_op (unsigned long maxbits,
int base, char **ap, char **rp)
{
mpz_t a;
unsigned long abits;
unsigned signs;
mpz_init (a);
abits = gmp_urandomb_ui (state, 32) % maxbits;
mpz_rrandomb (a, state, abits);
signs = gmp_urandomb_ui (state, 2);
if (signs & 1)
mpz_neg (a, a);
*ap = mpz_get_str (NULL, 16, a);
*rp = mpz_get_str (NULL, base, a);
mpz_clear (a);
}
void hex_random_lucm_op (unsigned long maxbits,
char **vp, char **qp, char **mp,
long *Q, unsigned long *b0, int *res)
{
mpz_t m, v, q, t1, t2;
unsigned long mbits;
mpz_init (m);
mpz_init (v);
mpz_init (q);
mpz_init (t1);
mpz_init (t2);
*Q = gmp_urandomb_ui (state, 14) + 1;
do
{
mbits = gmp_urandomb_ui (state, 32) % maxbits + 5;
mpz_rrandomb (m, state, mbits);
*b0 = gmp_urandomb_ui (state, 32) % (mbits - 3) + 2;
/* The GMP implementation uses the exponent (m >> b0) + 1. */
/* mini-gmp implementation uses the exponent (m >> b0) | 1. */
/* They are the same (and are used) only when (m >> b0) is even */
mpz_clrbit (m, *b0);
/* mini-gmp implementation only works if the modulus is odd. */
mpz_setbit (m, 0);
}
while (mpz_gcd_ui (NULL, m, *Q) != 1);
if (*Q == 1 || gmp_urandomb_ui (state, 1))
*Q = - *Q;
#if (__GNU_MP_VERSION == 6 && (__GNU_MP_VERSION_MINOR > 1 || __GNU_MP_VERSION_PATCHLEVEL > 9))
*res = mpz_lucas_mod (v, q, *Q, *b0, m, t1, t2);
#else
*b0 = 0;
#endif
gmp_asprintf (vp, "%Zx", v);
gmp_asprintf (qp, "%Zx", q);
gmp_asprintf (mp, "%Zx", m);
mpz_clear (m);
mpz_clear (v);
mpz_clear (q);
mpz_clear (t1);
mpz_clear (t2);
}
void
hex_mpq_random_str_op (unsigned long maxbits,
int base, char **ap, char **rp)
{
mpq_t a;
unsigned long abits;
unsigned signs;
mpq_init (a);
abits = gmp_urandomb_ui (state, 32) % maxbits;
mpz_rrandomb (mpq_numref (a), state, abits);
mpz_rrandomb (mpq_denref (a), state, abits);
mpz_add_ui (mpq_denref (a), mpq_denref (a), 1);
mpq_canonicalize (a);
signs = gmp_urandomb_ui (state, 2);
if (signs & 1)
mpq_neg (a, a);
*ap = mpq_get_str (NULL, 16, a);
*rp = mpq_get_str (NULL, base, a);
mpq_clear (a);
}
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