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/* makes a bignum test harness with NUM tests per operation
*
* the output is made in the following format [one parameter per line]
operation
operand1
operand2
[... operandN]
result1
result2
[... resultN]
So for example "a * b mod n" would be
mulmod
a
b
n
a*b mod n
e.g. if a=3, b=4 n=11 then
mulmod
3
4
11
1
*/
#ifdef MP_8BIT
#define THE_MASK 127
#else
#define THE_MASK 32767
#endif
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "mpi.c"
FILE *rng;
void rand_num(mp_int *a)
{
int n, size;
unsigned char buf[2048];
size = 1 + ((fgetc(rng)<<8) + fgetc(rng)) % 101;
buf[0] = (fgetc(rng)&1)?1:0;
fread(buf+1, 1, size, rng);
while (buf[1] == 0) buf[1] = fgetc(rng);
mp_read_raw(a, buf, 1+size);
}
void rand_num2(mp_int *a)
{
int n, size;
unsigned char buf[2048];
size = 10 + ((fgetc(rng)<<8) + fgetc(rng)) % 101;
buf[0] = (fgetc(rng)&1)?1:0;
fread(buf+1, 1, size, rng);
while (buf[1] == 0) buf[1] = fgetc(rng);
mp_read_raw(a, buf, 1+size);
}
#define mp_to64(a, b) mp_toradix(a, b, 64)
int main(void)
{
int n, tmp;
mp_int a, b, c, d, e;
clock_t t1;
char buf[4096];
mp_init(&a);
mp_init(&b);
mp_init(&c);
mp_init(&d);
mp_init(&e);
/* initial (2^n - 1)^2 testing, makes sure the comba multiplier works [it has the new carry code] */
/*
mp_set(&a, 1);
for (n = 1; n < 8192; n++) {
mp_mul(&a, &a, &c);
printf("mul\n");
mp_to64(&a, buf);
printf("%s\n%s\n", buf, buf);
mp_to64(&c, buf);
printf("%s\n", buf);
mp_add_d(&a, 1, &a);
mp_mul_2(&a, &a);
mp_sub_d(&a, 1, &a);
}
*/
rng = fopen("/dev/urandom", "rb");
if (rng == NULL) {
rng = fopen("/dev/random", "rb");
if (rng == NULL) {
fprintf(stderr, "\nWarning: stdin used as random source\n\n");
rng = stdin;
}
}
t1 = clock();
for (;;) {
#if 0
if (clock() - t1 > CLOCKS_PER_SEC) {
sleep(2);
t1 = clock();
}
#endif
n = fgetc(rng) % 15;
if (n == 0) {
/* add tests */
rand_num(&a);
rand_num(&b);
mp_add(&a, &b, &c);
printf("add\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
mp_to64(&c, buf);
printf("%s\n", buf);
} else if (n == 1) {
/* sub tests */
rand_num(&a);
rand_num(&b);
mp_sub(&a, &b, &c);
printf("sub\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
mp_to64(&c, buf);
printf("%s\n", buf);
} else if (n == 2) {
/* mul tests */
rand_num(&a);
rand_num(&b);
mp_mul(&a, &b, &c);
printf("mul\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
mp_to64(&c, buf);
printf("%s\n", buf);
} else if (n == 3) {
/* div tests */
rand_num(&a);
rand_num(&b);
mp_div(&a, &b, &c, &d);
printf("div\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
mp_to64(&c, buf);
printf("%s\n", buf);
mp_to64(&d, buf);
printf("%s\n", buf);
} else if (n == 4) {
/* sqr tests */
rand_num(&a);
mp_sqr(&a, &b);
printf("sqr\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
} else if (n == 5) {
/* mul_2d test */
rand_num(&a);
mp_copy(&a, &b);
n = fgetc(rng) & 63;
mp_mul_2d(&b, n, &b);
mp_to64(&a, buf);
printf("mul2d\n");
printf("%s\n", buf);
printf("%d\n", n);
mp_to64(&b, buf);
printf("%s\n", buf);
} else if (n == 6) {
/* div_2d test */
rand_num(&a);
mp_copy(&a, &b);
n = fgetc(rng) & 63;
mp_div_2d(&b, n, &b, NULL);
mp_to64(&a, buf);
printf("div2d\n");
printf("%s\n", buf);
printf("%d\n", n);
mp_to64(&b, buf);
printf("%s\n", buf);
} else if (n == 7) {
/* gcd test */
rand_num(&a);
rand_num(&b);
a.sign = MP_ZPOS;
b.sign = MP_ZPOS;
mp_gcd(&a, &b, &c);
printf("gcd\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
mp_to64(&c, buf);
printf("%s\n", buf);
} else if (n == 8) {
/* lcm test */
rand_num(&a);
rand_num(&b);
a.sign = MP_ZPOS;
b.sign = MP_ZPOS;
mp_lcm(&a, &b, &c);
printf("lcm\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
mp_to64(&c, buf);
printf("%s\n", buf);
} else if (n == 9) {
/* exptmod test */
rand_num2(&a);
rand_num2(&b);
rand_num2(&c);
// if (c.dp[0]&1) mp_add_d(&c, 1, &c);
a.sign = b.sign = c.sign = 0;
mp_exptmod(&a, &b, &c, &d);
printf("expt\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
mp_to64(&c, buf);
printf("%s\n", buf);
mp_to64(&d, buf);
printf("%s\n", buf);
} else if (n == 10) {
/* invmod test */
rand_num2(&a);
rand_num2(&b);
b.sign = MP_ZPOS;
a.sign = MP_ZPOS;
mp_gcd(&a, &b, &c);
if (mp_cmp_d(&c, 1) != 0) continue;
if (mp_cmp_d(&b, 1) == 0) continue;
mp_invmod(&a, &b, &c);
printf("invmod\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
mp_to64(&c, buf);
printf("%s\n", buf);
} else if (n == 11) {
rand_num(&a);
mp_mul_2(&a, &a);
mp_div_2(&a, &b);
printf("div2\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
} else if (n == 12) {
rand_num2(&a);
mp_mul_2(&a, &b);
printf("mul2\n");
mp_to64(&a, buf);
printf("%s\n", buf);
mp_to64(&b, buf);
printf("%s\n", buf);
} else if (n == 13) {
rand_num2(&a);
tmp = abs(rand()) & THE_MASK;
mp_add_d(&a, tmp, &b);
printf("add_d\n");
mp_to64(&a, buf);
printf("%s\n%d\n", buf, tmp);
mp_to64(&b, buf);
printf("%s\n", buf);
} else if (n == 14) {
rand_num2(&a);
tmp = abs(rand()) & THE_MASK;
mp_sub_d(&a, tmp, &b);
printf("sub_d\n");
mp_to64(&a, buf);
printf("%s\n%d\n", buf, tmp);
mp_to64(&b, buf);
printf("%s\n", buf);
}
}
fclose(rng);
return 0;
}
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