Commit a0bf2c86 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

make timing attack protection unconditional

parent 6a662a45

crypto/ecdsa/ecs_ossl.c

+0 −2
Original line number Diff line number Diff line
@@ -144,7 +144,6 @@ static int ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, 
			}

		while (BN_is_zero(k));



#ifdef ECDSA_POINT_MUL_NO_CONSTTIME

		/* We do not want timing information to leak the length of k,

		 * so we compute G*k using an equivalent scalar of fixed

		 * bit-length. */
@@ -152,7 +151,6 @@ static int ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, 
		if (!BN_add(k, k, order)) goto err;

		if (BN_num_bits(k) <= BN_num_bits(order))

			if (!BN_add(k, k, order)) goto err;

#endif /* def(ECDSA_POINT_MUL_NO_CONSTTIME) */



		/* compute r the x-coordinate of generator * k */

		if (!EC_POINT_mul(group, tmp_point, k, NULL, NULL, ctx))