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/*
* Off-the-Record Messaging Toolkit
* Copyright (C) 2004-2008 Ian Goldberg, Chris Alexander, Nikita Borisov
* <otr@cypherpunks.ca>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __SESSKEYS_H__
#define __SESSKEYS_H__
/* Generate the session id and the two encryption keys from our private
* DH key and their public DH key. Also indicate in *high_endp if we
* are the "high" end of the key exchange (set to 1) or the "low" end
* (set to 0) */
void sesskeys_gen(unsigned char sessionid[20], unsigned char sendenc[16],
unsigned char rcvenc[16], int *high_endp, gcry_mpi_t *our_yp,
gcry_mpi_t our_x, gcry_mpi_t their_y);
/* Generate a MAC key from the corresponding encryption key */
void sesskeys_make_mac(unsigned char mackey[20], unsigned char enckey[16]);
#endif
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