/* main.h
 *	Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
 *
 * This file is part of GnuPG.
 *
 * GnuPG 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.
 *
 * GnuPG 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 GPG_MAIN_H
#define GPG_MAIN_H

#include <gcrypt.h>
#include "basicdefs.h"
#include "iobuf.h"
#include "keydb.h"

#define DEFAULT_CIPHER_ALGO  GCRY_CIPHER_BLOWFISH
#define DEFAULT_PUBKEY_ALGO  GCRY_PUBKEY_ELGAMAL
#define DEFAULT_DIGEST_ALGO  GCRY_MD_RMD160

#define is_RSA(a)     ((a)==GCRY_PK_RSA || (a)==GCRY_PK_RSA_E \
					|| (a)==GCRY_PK_RSA_S )
#define is_ELGAMAL(a) ((a)==GCRY_PK_ELG || (a)==GCRY_PK_ELG_E)


/*-- gpg.c --*/
extern int gpg_errors_seen;

#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5 )
  void gpg_exit(int rc) __attribute__ ((noreturn));
#else
  void gpg_exit(int rc);
#endif
void print_pubkey_algo_note( int algo );
void print_cipher_algo_note( int algo );
void print_digest_algo_note( int algo );

/*-- armor.c --*/
char *make_radix64_string( const byte *data, size_t len );

/*-- misc.c --*/
void trap_unaligned(void);
int disable_core_dumps(void);
u16 checksum_u16( unsigned n );
u16 checksum( byte *p, unsigned n );
u16 checksum_mpi( MPI a );
u32 buffer_to_u32( const byte *buffer );

int mpi_write( IOBUF out, GCRY_MPI a );
int mpi_write_opaque( IOBUF out, MPI a );
GCRY_MPI mpi_read(IOBUF inp, unsigned int *ret_nread, int secure );
GCRY_MPI mpi_read_opaque(IOBUF inp, unsigned int *ret_nread );
int mpi_print( FILE *fp, MPI a, int mode );

int openpgp_cipher_test_algo( int algo );
int openpgp_pk_test_algo( int algo, unsigned int usage_flags );
int openpgp_pk_algo_usage ( int algo );
int openpgp_md_test_algo( int algo );

int pubkey_get_npkey( int algo );
int pubkey_get_nskey( int algo );
int pubkey_get_nsig( int algo );
int pubkey_get_nenc( int algo );
unsigned int pubkey_nbits( int algo, MPI *pkey );

/*-- helptext.c --*/
void display_online_help( const char *keyword );

/*-- encode.c --*/
int encode_symmetric( const char *filename );
int encode_store( const char *filename );
int encode_crypt( const char *filename, STRLIST remusr );
int encrypt_filter( void *opaque, int control,
		    IOBUF a, byte *buf, size_t *ret_len);


/*-- sign.c --*/
int complete_sig( PKT_signature *sig, PKT_secret_key *sk, GCRY_MD_HD md );
int sign_file( STRLIST filenames, int detached, STRLIST locusr,
	       int do_encrypt, STRLIST remusr, const char *outfile );
int clearsign_file( const char *fname, STRLIST locusr, const char *outfile );

/*-- sig-check.c --*/
int check_key_signature( KBNODE root, KBNODE node, int *is_selfsig );
int check_key_signature2( KBNODE root, KBNODE node,
			  int *is_selfsig, u32 *r_expiredate, int *r_expired );

/*-- delkey.c --*/
int delete_key( const char *username, int secure );

/*-- keyedit.c --*/
void keyedit_menu( const char *username, STRLIST locusr, STRLIST cmds,
							    int sign_mode );

/*-- keygen.c --*/
u32 ask_expiredate(void);
void generate_keypair( const char *fname );
int keygen_add_key_expire( PKT_signature *sig, void *opaque );
int keygen_add_std_prefs( PKT_signature *sig, void *opaque );
int generate_subkeypair( KBNODE pub_keyblock, KBNODE sec_keyblock );

/*-- openfile.c --*/
int overwrite_filep( const char *fname );
char *make_outfile_name( const char *iname );
char *ask_outfile_name( const char *name, size_t namelen );
int   open_outfile( const char *iname, int mode, IOBUF *a );
IOBUF open_sigfile( const char *iname );
void try_make_homedir( const char *fname );

/*-- seskey.c --*/
void make_session_key( DEK *dek );
MPI encode_session_key( DEK *dek, unsigned nbits );
MPI encode_md_value( int pubkey_algo,  GCRY_MD_HD md,
		     int hash_algo, unsigned nbits, int v3compathack );

/*-- comment.c --*/
KBNODE make_comment_node_from_buffer( const char *s, size_t n );
KBNODE make_comment_node( const char *s );

/*-- import.c --*/
void import_keys( char **fnames, int nnames, int fast );
int import_keys_stream( IOBUF inp, int fast );
int collapse_uids( KBNODE *keyblock );

/*-- export.c --*/
int export_pubkeys( STRLIST users, int onlyrfc );
int export_pubkeys_stream( IOBUF out, STRLIST users, int onlyrfc );
int export_seckeys( STRLIST users );
int export_secsubkeys( STRLIST users );

/* dearmor.c --*/
int dearmor_file( const char *fname );
int enarmor_file( const char *fname );

/*-- revoke.c --*/
struct revocation_reason_info;
int gen_revoke( const char *uname );
int revocation_reason_build_cb( PKT_signature *sig, void *opaque );
struct revocation_reason_info *
		ask_revocation_reason( int key_rev, int cert_rev, int hint );
void release_revocation_reason_info( struct revocation_reason_info *reason );

/*-- keylist.c --*/
void public_key_list( STRLIST list );
void secret_key_list( STRLIST list );

/*-- verify.c --*/
int verify_signatures( int nfiles, char **files );
int verify_files( int nfiles, char **files );

/*-- decrypt.c --*/
int decrypt_message( const char *filename );

/*-- plaintext.c --*/
int hash_datafiles( GCRY_MD_HD md, GCRY_MD_HD md2,
		    STRLIST files, const char *sigfilename, int textmode );

/*-- signal.c --*/
void init_signals(void);
void pause_on_sigusr( int which );
void block_all_signals(void);
void unblock_all_signals(void);

#endif /*GPG_MAIN_H*/