| /** |
| * \file ecdh.h |
| * |
| * \brief Elliptic curve Diffie-Hellman |
| * |
| * Copyright (C) 2006-2013, Brainspark B.V. |
| * |
| * This file is part of PolarSSL (http://www.polarssl.org) |
| * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> |
| * |
| * All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| #ifndef POLARSSL_ECDH_H |
| #define POLARSSL_ECDH_H |
| |
| #include "polarssl/ecp.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** |
| * \brief Generate a public key |
| * |
| * \param grp ECP group |
| * \param d Destination MPI (secret exponent) |
| * \param Q Destination point (public key) |
| * \param f_rng RNG function |
| * \param p_rng RNG parameter |
| * |
| * \return 0 if successful, |
| * or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code |
| */ |
| int ecdh_gen_public( const ecp_group *grp, mpi *d, ecp_point *Q, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng ); |
| |
| /** |
| * \brief Compute shared secret |
| * |
| * \param grp ECP group |
| * \param z Destination MPI (shared secret) |
| * \param Q Public key from other party |
| * \param d Our secret exponent |
| * |
| * \return 0 if successful, |
| * or a POLARSSL_ERR_ECP_XXX or POLARSSL_MPI_XXX error code |
| */ |
| int ecdh_compute_shared( const ecp_group *grp, mpi *z, |
| const ecp_point *Q, const mpi *d ); |
| |
| /** |
| * \brief Checkup routine |
| * |
| * \return 0 if successful, or 1 if the test failed |
| */ |
| int ecdh_self_test( int verbose ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |