add minimal mp_sqrtmod_prime() tests to demo.c
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demo/demo.c
25
demo/demo.c
@ -103,6 +103,16 @@ static void _cleanup(void)
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fclose(fd_urandom);
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#endif
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}
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struct mp_sqrtmod_prime_st {
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unsigned long p;
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unsigned long n;
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mp_digit r;
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};
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struct mp_sqrtmod_prime_st sqrtmod_prime[] = {
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{ 5, 14, 3 },
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{ 7, 9, 4 },
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{ 113, 2, 62 }
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};
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char cmd[4096], buf[4096];
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int main(void)
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@ -305,6 +315,21 @@ printf("compare no compare!\n"); return EXIT_FAILURE; }
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}
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printf("\n\n");
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// r^2 = n (mod p)
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for (i = 0; i < (int)(sizeof(sqrtmod_prime)/sizeof(sqrtmod_prime[0])); ++i) {
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mp_set_int(&a, sqrtmod_prime[i].p);
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mp_set_int(&b, sqrtmod_prime[i].n);
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if (mp_sqrtmod_prime(&b, &a, &c) != MP_OKAY) {
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printf("Failed executing %d. mp_sqrtmod_prime\n", (i+1));
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return EXIT_FAILURE;
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}
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if (mp_cmp_d(&c, sqrtmod_prime[i].r) != MP_EQ) {
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printf("Failed %d. trivial mp_sqrtmod_prime\n", (i+1));
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ndraw(&c, "r");
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return EXIT_FAILURE;
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}
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}
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/* test for size */
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for (ix = 10; ix < 128; ix++) {
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printf("Testing (not safe-prime): %9d bits \r", ix);
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