Optimize ntru_poly constructors some more
[strongswan.git] / src / libstrongswan / plugins / ntru / ntru_poly.c
index 3f754f2..77ab54a 100644 (file)
@@ -239,11 +239,29 @@ METHOD(ntru_poly_t, destroy, void,
        free(this);
 }
 
-static void init_indices(private_ntru_poly_t *this, bool is_product_form,
-                                                uint32_t indices_len_p, uint32_t indices_len_m)
+/**
+ * Creates an empty ntru_poly_t object with space allocated for indices
+ */
+static private_ntru_poly_t* ntru_poly_create(uint16_t N, uint16_t q,
+                                                                                        uint32_t indices_len_p,
+                                                                                        uint32_t indices_len_m,
+                                                                                        bool is_product_form)
 {
+       private_ntru_poly_t *this;
        int n;
 
+       INIT(this,
+               .public = {
+                       .get_size = _get_size,
+                       .get_indices = _get_indices,
+                       .get_array = _get_array,
+                       .ring_mult = _ring_mult,
+                       .destroy = _destroy,
+               },
+               .N = N,
+               .q = q,
+       );
+
        if (is_product_form)
        {
                this->num_polynomials = 3;
@@ -265,6 +283,8 @@ static void init_indices(private_ntru_poly_t *this, bool is_product_form,
                this->num_indices = indices_len_p + indices_len_m;
        }
        this->indices = malloc(sizeof(uint16_t) * this->num_indices);
+
+       return this;
 }
 
 /*
@@ -291,19 +311,8 @@ ntru_poly_t *ntru_poly_create_from_seed(hash_algorithm_t alg, chunk_t seed,
        }
        i = hash_len = mgf1->get_hash_size(mgf1);
 
-       INIT(this,
-               .public = {
-                       .get_size = _get_size,
-                       .get_indices = _get_indices,
-                       .get_array = _get_array,
-                       .ring_mult = _ring_mult,
-                       .destroy = _destroy,
-               },
-               .N = N,
-               .q = q,
-       );
+       this = ntru_poly_create(N, q, indices_len_p, indices_len_m, is_product_form);
 
-       init_indices(this, is_product_form, indices_len_p, indices_len_m);
        used = malloc(N);
        limit = N * ((1 << c_bits) / N);
 
@@ -390,19 +399,8 @@ ntru_poly_t *ntru_poly_create_from_data(uint16_t *data, uint16_t N, uint16_t q,
        private_ntru_poly_t *this;
        int i;
 
-       INIT(this,
-               .public = {
-                       .get_size = _get_size,
-                       .get_indices = _get_indices,
-                       .get_array = _get_array,
-                       .ring_mult = _ring_mult,
-                       .destroy = _destroy,
-               },
-               .N = N,
-               .q = q,
-       );
+       this = ntru_poly_create(N, q, indices_len_p, indices_len_m, is_product_form);
 
-       init_indices(this, is_product_form, indices_len_p, indices_len_m);
        for (i = 0; i < this->num_indices; i++)
        {
                this->indices[i] = data[i];