if (zz == 0) break;
d1 = BN_BITS2 - d0;
- if (d0) z[dN] = (z[dN] << d1) >> d1; /* clear up the top d1 bits */
+ /* clear up the top d1 bits */
+ if (d0)
+ z[dN] = (z[dN] << d1) >> d1;
+ else
+ z[dN] = 0;
z[0] ^= zz; /* reduction t^0 component */
for (k = 1; p[k] != 0; k++)
ret = BN_GF2m_poly2arr(p, arr, max);
if (!ret || ret > max)
{
- BNerr(BN_F_BN_GF2M_MOD_EXP,BN_R_INVALID_LENGTH);
+ BNerr(BN_F_BN_GF2M_MOD_SQRT,BN_R_INVALID_LENGTH);
goto err;
}
ret = BN_GF2m_mod_sqrt_arr(r, a, arr, ctx);
if (!BN_GF2m_mod_sqr_arr(w, z, p, ctx)) goto err;
if (!BN_GF2m_add(w, z, w)) goto err;
- if (BN_GF2m_cmp(w, a)) goto err;
+ if (BN_GF2m_cmp(w, a))
+ {
+ BNerr(BN_F_BN_GF2M_MOD_SOLVE_QUAD_ARR, BN_R_NO_SOLUTION);
+ goto err;
+ }
if (!BN_copy(r, z)) goto err;
bn_check_top(r);
BN_zero(a);
for (i = 0; p[i] != 0; i++)
{
- BN_set_bit(a, p[i]);
+ if (BN_set_bit(a, p[i]) == 0)
+ return 0;
}
BN_set_bit(a, 0);
bn_check_top(a);