release/src/router/nettle/testsuite/ecc-mul-g-test.c

   1 #include "testutils.h"
   2
   3 void
   4 test_main (void)
   5 {
   6   gmp_randstate_t state;
   7   mpz_t r;
   8   unsigned i;
   9
  10   gmp_randinit_default (state);
  11   mpz_init (r);
  12
  13   for (i = 0; ecc_curves[i]; i++)
  14     {
  15       const struct ecc_curve *ecc = ecc_curves[i];
  16       mp_size_t size = ecc_size (ecc);
  17       mp_limb_t *p = xalloc_limbs (ecc_size_j (ecc));
  18       mp_limb_t *q = xalloc_limbs (ecc_size_j (ecc));
  19       mp_limb_t *n = xalloc_limbs (size);
  20       mp_limb_t *scratch = xalloc_limbs (ecc_mul_g_itch (ecc));
  21
  22       mpn_zero (n, size);
  23
  24       n[0] = 1;
  25       ecc_mul_g (ecc, p, n, scratch);
  26       ecc_j_to_a (ecc, 1, p, p, scratch);
  27
  28       if (mpn_cmp (p, ecc->g, 2*size != 0))
  29         {
  30           fprintf (stderr, "ecc_mul_g with n = 1 failed.\n");
  31           abort ();
  32         }
  33
  34       for (n[0] = 2; n[0] <= 4; n[0]++)
  35         {
  36           ecc_mul_g (ecc, p, n, scratch);
  37           test_ecc_mul_j (i, n[0], p);
  38         }
  39
  40       /* (order - 1) * g = - g */
  41       mpn_sub_1 (n, ecc->q, size, 1);
  42       ecc_mul_g (ecc, p, n, scratch);
  43       ecc_j_to_a (ecc, 1, p, p, scratch);
  44       mpn_sub_n (p + size, ecc->p, p + size, size);
  45       if (mpn_cmp (p, ecc->g, 2*size) != 0)
  46         {
  47           fprintf (stderr, "ecc_mul_g with n = order - 1 failed.\n");
  48           abort ();
  49         }
  50
  51       free (n);
  52       free (p);
  53       free (q);
  54       free (scratch);
  55     }
  56   mpz_clear (r);
  57   gmp_randclear (state);
  58 }