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/* ec-context.h - Private definitions for CONTEXT_TYPE_EC.
* Copyright (C) 2013 g10 Code GmbH
*
* This file is part of Libgcrypt.
*
* Libgcrypt is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser general Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* Libgcrypt is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GCRY_EC_CONTEXT_H
#define GCRY_EC_CONTEXT_H
/* This context is used with all our EC functions. */
struct mpi_ec_ctx_s
{
/* Domain parameters. Note that they may not all be set and if set
the MPIs may be flaged as constant.*/
gcry_mpi_t p; /* Prime specifying the field GF(p). */
gcry_mpi_t a; /* First coefficient of the Weierstrass equation. */
gcry_mpi_t b; /* Second coefficient of the Weierstrass equation. */
gcry_mpi_point_t G; /* Base point (generator). */
gcry_mpi_t n; /* Order of G. */
/* The actual key. May not be set. */
gcry_mpi_point_t Q; /* Public key. */
gcry_mpi_t d; /* Private key. */
/* This structure is private to mpi/ec.c! */
struct {
int a_is_pminus3; /* True if A = P - 3. */
gcry_mpi_t two_inv_p;
/* Scratch variables. */
gcry_mpi_t scratch[11];
/* Helper for fast reduction. */
/* int nist_nbits; /\* If this is a NIST curve, the # of bits. *\/ */
/* gcry_mpi_t s[10]; */
/* gcry_mpi_t c; */
} t;
};
#endif /*GCRY_EC_CONTEXT_H*/
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