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Optimize ntru_poly constructors some more

This commit is contained in:
Andreas Steffen 2014-02-27 23:06:51 +01:00
parent 1d252e9dec
commit d6ce8da6c0
1 changed files with 24 additions and 26 deletions
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50
src/libstrongswan/plugins/ntru/ntru_poly.c
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@ -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];