/*
    This file is part of Pretty Curved Privacy (pcp1).

    Copyright (C) 2013 T.Linden.

    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 3 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, see <http://www.gnu.org/licenses/>.

    You can contact me by mail: <tlinden AT cpan DOT org>.
*/


#ifndef _DEFINES_H
#define _DEFINES_H

#include "config.h"

typedef unsigned char   byte;           /*   Single unsigned byte = 8 bits */
typedef unsigned short  dbyte;          /*   Double byte = 16 bits */
typedef unsigned int    qbyte;          /*   Quad byte = 32 bits */

/*  key stuff */
#define PCP_KEY_HEADER "----- BEGIN PCP SECRET KEY -----"
#define PCP_KEY_FOOTER "------ END PCP SECRET KEY ------"

#define PCP_PUBKEY_HEADER "----- BEGIN PCP PUBLIC KEY -----"
#define PCP_PUBKEY_FOOTER "------ END PCP PUBLICKEY ------"

#define PCP_ENFILE_HEADER "----- BEGIN PCP ENCRYPTED FILE -----"
#define PCP_ENFILE_FOOTER "------ END PCP ENCRYPTED FILE ------"

#define PCP_ZFILE_HEADER "----- BEGIN Z85 ENCODED FILE -----"
#define PCP_ZFILE_FOOTER "------ END Z85 ENCODED FILE ------"

#define PCP_SIG_HEADER "----- BEGIN ED25519 SIGNED MESSAGE -----"
#define PCP_SIG_START  "----- BEGIN ED25519 SIGNATURE -----"
#define PCP_SIG_END    "------ END ED25519 SIGNATURE ------"
#define PCP_SIGPREFIX  "\nnacl-"

#define PCP_ME "Pretty Curved Privacy"

#define PCP_KEY_VERSION 6
#define PCP_KEY_PRIMITIVE "CURVE25519-ED25519-SALSA20-POLY1305"

#define PCP_KEY_TYPE_MAINSECRET 1
#define PCP_KEY_TYPE_SECRET     2
#define PCP_KEY_TYPE_PUBLIC     3
#define PCP_KEYSIG_NATIVE       4
#define PCP_KEYSIG_PBP          5

/*  save typing, dammit */
#define PCP_ENCRYPT_MAC crypto_secretbox_ZEROBYTES + crypto_secretbox_NONCEBYTES

/*  vault id */
#define PCP_VAULT_ID 14
#define PCP_VAULT_VERSION 2

/*  sigs */
#define PCP_SIG_VERSION 2

/*  crypto file format stuff */
/*  enabled via config.h (configure --enable-cbc) */
#ifndef PCP_CBC
  #define PCP_ASYM_CIPHER         5
  #define PCP_SYM_CIPHER          23
  #define PCP_BLOCK_SIZE          32 * 1024
#else
/*  CBC mode, use smaller blocks */
  #define PCP_ASYM_CIPHER         7
  #define PCP_SYM_CIPHER          25
  #define PCP_BLOCK_SIZE          1 * 1024
#endif

#define PCP_CRYPTO_ADD          (crypto_box_ZEROBYTES - crypto_box_BOXZEROBYTES)
#define PCP_BLOCK_SIZE_IN       (PCP_BLOCK_SIZE) + PCP_CRYPTO_ADD + crypto_secretbox_NONCEBYTES
#define PCP_ASYM_RECIPIENT_SIZE crypto_secretbox_KEYBYTES + PCP_CRYPTO_ADD + crypto_secretbox_NONCEBYTES

/* #define PCP_ASYM_ADD_SENDER_PUB */

/*  used for self encryption only */
#define PBP_COMPAT_SALT "qa~t](84z<1t<1oz:ik.@IRNyhG=8q(on9}4#!/_h#a7wqK{Nt$T?W>,mt8NqYq&6U<GB1$,<$j>,rSYI2GRDd:Bcm"

#define PCP_RFC_CIPHER 0x21 /* curve25519+ed25519+poly1305+salsa20+blake2 */

/*  error handling */
extern char *PCP_ERR;
extern byte PCP_ERRSET;
extern int PCP_EXIT;

/* set error */
void fatal(const char * fmt, ...);

/*  fetch error */
void fatals_ifany();

/*  reset */
void fatals_reset();

/* free mem */
void fatals_done();

#endif /*  _DEFINES_H */