mirror of git://git.gnupg.org/gnupg.git
123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
/* cipher.h
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* Copyright (c) 1997 by Werner Koch (dd9jn)
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*
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* ATTENTION: This code should not be exported from the United States
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* nor should it be used their without a license agreement with PKP.
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* The RSA alorithm is protected by U.S. Patent #4,405,829 which
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* expires on September 20, 2000!
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*
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* This file is part of G10.
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*
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* G10 is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* G10 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifndef G10_CIPHER_H
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#define G10_CIPHER_H
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#define DBG_CIPHER cipher_debug_mode
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#include "mpi.h"
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#include "../cipher/md.h"
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#ifdef HAVE_RSA_CIPHER
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#include "../cipher/rsa.h"
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#endif
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#include "../cipher/elgamal.h"
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#include "../cipher/dsa.h"
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#include "../cipher/random.h"
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#define CIPHER_ALGO_NONE 0
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#define CIPHER_ALGO_IDEA 1
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#define CIPHER_ALGO_3DES 2
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#define CIPHER_ALGO_CAST 3
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#define CIPHER_ALGO_BLOWFISH 4 /* blowfish 128 bit key */
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#define CIPHER_ALGO_SAFER_SK128 5
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#define CIPHER_ALGO_DES_SK 6
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#define CIPHER_ALGO_BLOWFISH160 42 /* blowfish 160 bit key (not in OpenPGP)*/
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#define CIPHER_ALGO_DUMMY 110 /* no encryption at all */
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#define PUBKEY_ALGO_RSA 1
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#define PUBKEY_ALGO_RSA_E 2 /* RSA encrypt only */
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#define PUBKEY_ALGO_RSA_S 3 /* RSA sign only */
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#define PUBKEY_ALGO_ELGAMAL_E 16 /* encrypt only ElGamal (but not vor v3)*/
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#define PUBKEY_ALGO_DSA 17
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#define PUBKEY_ALGO_ELGAMAL 20 /* sign and encrypt elgamal */
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#define DIGEST_ALGO_MD5 1
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#define DIGEST_ALGO_SHA1 2
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#define DIGEST_ALGO_RMD160 3
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#ifdef WITH_TIGER_HASH
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#define DIGEST_ALGO_TIGER 6
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#endif
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#define is_RSA(a) ((a)==PUBKEY_ALGO_RSA || (a)==PUBKEY_ALGO_RSA_E \
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|| (a)==PUBKEY_ALGO_RSA_S )
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#define is_ELGAMAL(a) ((a)==PUBKEY_ALGO_ELGAMAL || (a)==PUBKEY_ALGO_ELGAMAL_E)
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typedef struct {
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int algo;
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int keylen;
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byte key[20]; /* this is the largest used keylen */
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} DEK;
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typedef struct cipher_handle_s *CIPHER_HANDLE;
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#ifndef DEFINES_CIPHER_HANDLE
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struct cipher_handle_s { char does_not_matter[1]; };
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#endif
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#define CIPHER_MODE_ECB 1
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#define CIPHER_MODE_CFB 2
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#define CIPHER_MODE_PHILS_CFB 3
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#define CIPHER_MODE_AUTO_CFB 4
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#define CIPHER_MODE_DUMMY 5 /* used with algo DUMMY for no encryption */
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int cipher_debug_mode;
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/*-- cipher.c --*/
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int string_to_cipher_algo( const char *string );
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const char * cipher_algo_to_string( int algo );
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int check_cipher_algo( int algo );
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unsigned cipher_get_keylen( int algo );
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CIPHER_HANDLE cipher_open( int algo, int mode, int secure );
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void cipher_close( CIPHER_HANDLE c );
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void cipher_setkey( CIPHER_HANDLE c, byte *key, unsigned keylen );
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void cipher_setiv( CIPHER_HANDLE c, const byte *iv );
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void cipher_encrypt( CIPHER_HANDLE c, byte *out, byte *in, unsigned nbytes );
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void cipher_decrypt( CIPHER_HANDLE c, byte *out, byte *in, unsigned nbytes );
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void cipher_sync( CIPHER_HANDLE c );
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/*-- misc.c --*/
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int string_to_pubkey_algo( const char *string );
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int string_to_digest_algo( const char *string );
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const char * pubkey_algo_to_string( int algo );
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const char * digest_algo_to_string( int algo );
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int check_pubkey_algo( int algo );
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int check_pubkey_algo2( int algo, unsigned usage );
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int check_digest_algo( int algo );
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/*-- smallprime.c --*/
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extern ushort small_prime_numbers[];
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/*-- primegen.c --*/
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MPI generate_secret_prime( unsigned nbits );
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MPI generate_public_prime( unsigned nbits );
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MPI generate_elg_prime( int mode, unsigned pbits, unsigned qbits,
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MPI g, MPI **factors );
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#endif /*G10_CIPHER_H*/
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