236 lines
5.3 KiB
C
236 lines
5.3 KiB
C
/* makes a bignum test harness with NUM tests per operation
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*
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* the output is made in the following format [one parameter per line]
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operation
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operand1
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operand2
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[... operandN]
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result1
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result2
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[... resultN]
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So for example "a * b mod n" would be
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mulmod
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a
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b
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n
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a*b mod n
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e.g. if a=3, b=4 n=11 then
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mulmod
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3
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4
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11
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1
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include "mpi.c"
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FILE *rng;
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void rand_num(mp_int *a)
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{
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int n, size;
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unsigned char buf[512];
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top:
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size = 1 + ((fgetc(rng)*fgetc(rng)) % 32);
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buf[0] = (fgetc(rng)&1)?1:0;
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fread(buf+1, 1, size, rng);
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for (n = 0; n < size; n++) {
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if (buf[n+1]) break;
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}
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if (n == size) goto top;
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mp_read_raw(a, buf, 1+size);
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}
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void rand_num2(mp_int *a)
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{
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int n, size;
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unsigned char buf[512];
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top:
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size = 1 + ((fgetc(rng)*fgetc(rng)) % 32);
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buf[0] = (fgetc(rng)&1)?1:0;
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fread(buf+1, 1, size, rng);
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for (n = 0; n < size; n++) {
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if (buf[n+1]) break;
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}
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if (n == size) goto top;
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mp_read_raw(a, buf, 1+size);
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}
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int main(void)
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{
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int n;
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mp_int a, b, c, d, e;
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char buf[4096];
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mp_init(&a);
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mp_init(&b);
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mp_init(&c);
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mp_init(&d);
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mp_init(&e);
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rng = fopen("/dev/urandom", "rb");
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for (;;) {
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n = fgetc(rng) % 11;
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if (n == 0) {
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/* add tests */
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rand_num(&a);
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rand_num(&b);
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mp_add(&a, &b, &c);
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printf("add\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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mp_todecimal(&c, buf);
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printf("%s\n", buf);
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} else if (n == 1) {
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/* sub tests */
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rand_num(&a);
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rand_num(&b);
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mp_sub(&a, &b, &c);
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printf("sub\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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mp_todecimal(&c, buf);
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printf("%s\n", buf);
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} else if (n == 2) {
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/* mul tests */
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rand_num(&a);
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rand_num(&b);
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mp_mul(&a, &b, &c);
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printf("mul\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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mp_todecimal(&c, buf);
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printf("%s\n", buf);
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} else if (n == 3) {
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/* div tests */
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rand_num(&a);
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rand_num(&b);
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mp_div(&a, &b, &c, &d);
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printf("div\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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mp_todecimal(&c, buf);
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printf("%s\n", buf);
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mp_todecimal(&d, buf);
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printf("%s\n", buf);
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} else if (n == 4) {
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/* sqr tests */
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rand_num(&a);
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mp_sqr(&a, &b);
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printf("sqr\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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} else if (n == 5) {
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/* mul_2d test */
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rand_num(&a);
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mp_copy(&a, &b);
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n = fgetc(rng) & 63;
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mp_mul_2d(&b, n, &b);
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mp_todecimal(&a, buf);
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printf("mul2d\n");
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printf("%s\n", buf);
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printf("%d\n", n);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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} else if (n == 6) {
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/* div_2d test */
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rand_num(&a);
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mp_copy(&a, &b);
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n = fgetc(rng) & 63;
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mp_div_2d(&b, n, &b, NULL);
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mp_todecimal(&a, buf);
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printf("div2d\n");
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printf("%s\n", buf);
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printf("%d\n", n);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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} else if (n == 7) {
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/* gcd test */
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rand_num(&a);
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rand_num(&b);
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a.sign = MP_ZPOS;
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b.sign = MP_ZPOS;
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mp_gcd(&a, &b, &c);
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printf("gcd\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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mp_todecimal(&c, buf);
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printf("%s\n", buf);
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} else if (n == 8) {
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/* lcm test */
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rand_num(&a);
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rand_num(&b);
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a.sign = MP_ZPOS;
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b.sign = MP_ZPOS;
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mp_lcm(&a, &b, &c);
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printf("lcm\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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mp_todecimal(&c, buf);
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printf("%s\n", buf);
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} else if (n == 9) {
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/* exptmod test */
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rand_num2(&a);
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rand_num2(&b);
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rand_num2(&c);
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a.sign = b.sign = c.sign = 0;
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mp_exptmod(&a, &b, &c, &d);
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printf("expt\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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mp_todecimal(&c, buf);
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printf("%s\n", buf);
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mp_todecimal(&d, buf);
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printf("%s\n", buf);
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} else if (n == 10) {
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/* invmod test */
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rand_num2(&a);
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rand_num2(&b);
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b.sign = MP_ZPOS;
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a.sign = MP_ZPOS;
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mp_gcd(&a, &b, &c);
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if (mp_cmp_d(&c, 1) != 0) continue;
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if (mp_cmp_d(&b, 1) == 0) continue;
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mp_invmod(&a, &b, &c);
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printf("invmod\n");
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mp_todecimal(&a, buf);
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printf("%s\n", buf);
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mp_todecimal(&b, buf);
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printf("%s\n", buf);
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mp_todecimal(&c, buf);
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printf("%s\n", buf);
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}
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}
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fclose(rng);
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return 0;
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}
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