76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/*
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* Copyright (C) 2014 FH Bielefeld
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*
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* This file is part of a FH Bielefeld project.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#include "context.h"
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#include "keypair.h"
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#include "poly.h"
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#include <fmpz_poly.h>
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#include <fmpz.h>
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#include <stdbool.h>
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bool ntru_create_keypair(
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fmpz_poly_t f,
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fmpz_poly_t g,
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keypair *pair,
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ntru_context *ctx)
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{
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bool retval = true;
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fmpz_poly_t Fq,
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Fp,
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pub;
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fmpz_poly_init(Fq);
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fmpz_poly_init(Fp);
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fmpz_poly_init(pub);
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if (!poly_inverse_poly_q(f, Fq, ctx)) {
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retval = false;
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goto cleanup;
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}
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if (!poly_inverse_poly_q(f, Fp, ctx)) {
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retval = false;
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goto cleanup;
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}
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poly_starmultiply(Fq, g, pub, ctx, ctx->q);
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fmpz_poly_scalar_mul_ui(pub, pub, ctx->p);
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fmpz_poly_mod(pub, ctx->q);
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fmpz_poly_init(pair->priv);
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fmpz_poly_init(pair->pub);
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fmpz_poly_set(pair->priv, f);
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fmpz_poly_set(pair->priv_inv, Fp);
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fmpz_poly_set(pair->pub, pub);
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cleanup:
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fmpz_poly_clear(Fq);
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fmpz_poly_clear(Fp);
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fmpz_poly_clear(pub);
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return retval;
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}
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