/* Maximum number of iterations before BN_GF2m_mod_solve_quad_arr should fail. */
#define MAX_ITERATIONS 50
+__fips_constseg
static const BN_ULONG SQR_tb[16] =
{ 0, 1, 4, 5, 16, 17, 20, 21,
64, 65, 68, 69, 80, 81, 84, 85 };
*/
int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx)
{
- BIGNUM *b, *c, *u, *v, *tmp;
+ BIGNUM *b, *c = NULL, *u = NULL, *v = NULL, *tmp;
int ret = 0;
bn_check_top(a);
}
if (ubits==vbits)
{
- bn_fix_top(u);
- ubits = BN_num_bits(u);
+ BN_ULONG ul;
+ int utop = (ubits-1)/BN_BITS2;
+
+ while ((ul=udp[utop])==0 && utop) utop--;
+ ubits = utop*BN_BITS2 + BN_num_bits_word(ul);
}
}
- bn_fix_top(b);
+ bn_correct_top(b);
}
#endif
ret = 1;
err:
+#ifdef BN_DEBUG /* BN_CTX_end would complain about the expanded form */
+ bn_correct_top(c);
+ bn_correct_top(u);
+ bn_correct_top(v);
+#endif
BN_CTX_end(ctx);
return ret;
}