/*
 * Copyright (c) 2016, mod0keecrack
 *    Thorsten Schroeder <ths at modzero dot ch>
 *
 * All rights reserved.
 *
 * This file is part of mod0keecrack.
 *
 * "THE BEER-WARE LICENSE" (Revision 42):
 * Thorsten Schroeder <ths at modzero dot ch> wrote this file. As long as you
 * retain this notice you can do whatever you want with this stuff. If we meet
 * some day, and you think this stuff is worth it, you can buy me a beer in
 * return. Thorsten Schroeder.
 *
 * NON-MILITARY-USAGE CLAUSE
 * Redistribution and use in source and binary form for military use and
 * military research is not permitted. Infringement of these clauses may
 * result in publishing the source code of the utilizing applications and
 * libraries to the public. As this software is developed, tested and
 * reviewed by *international* volunteers, this clause shall not be refused
 * due to the matter of *national* security concerns.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE DDK PROJECT BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * File: mod0keecrack.h
 * Description: Project header file. Datatypes und function prototypes.
 */

#ifndef _MOD0KEECRACK_H
#define _MOD0KEECRACK_H

typedef uintmax_t off_t;


enum _m0_kdbx_headerid {
  END,
  COMMENT,
  CIPHERID,
  COMPRESSIONFLAGS,
  MASTERSEED,
  TRANSFORMSEED,        // 5
  TRANSFORMROUNDS,
  ENCRYPTIONIV,
  PROTECTEDSTREAMKEY,
  STREAMSTARTBYTES,
  INNERRANDOMSTREAMID,  // 10
  HEADERIDCOUNT
};

typedef enum _m0_kdbx_headerid m0_kdbx_headerid_t;

typedef struct _m0_kdbx_header_entry {
  uint8_t   id;
  uint16_t  len;
  uint8_t   *data;
  uint32_t  dw;
  uint64_t  qw;
} m0_kdbx_header_entry_t;


typedef struct _m0_kdbx_header {
  uint32_t magic;
  uint32_t identifier;
  uint16_t minor_version;
  uint16_t major_version;
} m0_kdbx_header_t;

typedef struct _m0_kdbx_payload {
  off_t offset_start;
  off_t pos;
  size_t len;
  uint8_t *encrypted;
  uint8_t *decrypted;

} m0_kdbx_payload_t;

typedef struct _m0kdbx_data {
    m0_kdbx_header_t  header;
    size_t    data_len;
    uint8_t   *data;
} m0_kbdx_data_t;

typedef struct _m0_kdbx_database {
  m0_kdbx_header_t        fileheader;
  m0_kdbx_header_entry_t  kdbxheader;
  m0_kdbx_payload_t       payload;
} m0_kdbx_database_t;

// Function prototypes

size_t  kdbx_headerentries_free(m0_kdbx_header_entry_t *);
size_t  kdbx_headerentries_read(FILE *, m0_kdbx_header_entry_t *);
void    kdbx_headerentries_dump(m0_kdbx_header_entry_t *);

size_t  kdbx_header_read(FILE *, m0_kdbx_header_t *);
void    kdbx_header_dump(m0_kdbx_header_t);

size_t  kdbx_payload_read(FILE *, m0_kdbx_payload_t *);
void    kdbx_payload_dump(m0_kdbx_payload_t);
bool    kdbx_payload_crack(m0_kdbx_database_t *, FILE *);

bool    kdbx_decrypt_payload(m0_kdbx_database_t *, char *, uint8_t *);

#endif