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/* cipher.h
* Copyright (c) 1997 by Werner Koch (dd9jn)
*
* ATTENTION: This code should not be exported from the United States
* nor should it be used their without a license agreement with PKP.
* The RSA alorithm is protected by U.S. Patent #4,405,829 which
* expires on September 20, 2000!
*
* This file is part of G10.
*
* G10 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.
*
* G10 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 G10_CIPHER_H
#define G10_CIPHER_H
#define DBG_CIPHER cipher_debug_mode
#include "mpi.h"
#include "../cipher/md5.h"
#include "../cipher/rmd.h"
#ifdef HAVE_RSA_CIPHER
#include "../cipher/rsa.h"
#endif
#include "../cipher/idea.h"
#include "../cipher/blowfish.h"
#include "../cipher/gost.h"
#include "../cipher/elgamal.h"
#define CIPHER_ALGO_NONE 0
#define CIPHER_ALGO_IDEA 1
#define CIPHER_ALGO_BLOWFISH 42
#define CIPHER_ALGO_GOST 43
#define PUBKEY_ALGO_RSA 1
#define PUBKEY_ALGO_ELGAMAL 42
#define DIGEST_ALGO_MD5 1
#define DIGEST_ALGO_RMD160 42
#define DEFAULT_CIPHER_ALGO CIPHER_ALGO_BLOWFISH
#define DEFAULT_PUBKEY_ALGO PUBKEY_ALGO_RSA
#define DEFAULT_DIGEST_ALGO DIGEST_ALGO_RMD160
typedef struct {
int algo;
int keylen;
byte key[20]; /* this is the largest used keylen */
} DEK;
typedef struct {
int algo; /* digest algo */
union {
MD5HANDLE md5;
RMDHANDLE rmd;
} u;
} MD_HANDLE;
int cipher_debug_mode;
/*-- random.c --*/
void randomize_buffer( byte *buffer, size_t length, int level );
byte get_random_byte( int level );
/*-- smallprime.c --*/
extern ushort small_prime_numbers[];
/*-- primegen.c --*/
MPI generate_random_prime( unsigned nbits );
/*-- seskey.c --*/
void make_session_key( DEK *dek );
MPI encode_session_key( DEK *dek, unsigned nbits );
#endif /*G10_CIPHER_H*/
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