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/* $Id: hash.h,v 1.4 2005/05/14 23:20:30 harbourn Exp $
* dcfldd - The Enhanced Forensic DD
* By Nicholas Harbour
*/
/* Copyright (C) 85, 90, 91, 1995-2001, 2005 Free Software Foundation, Inc.
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 2, 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, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* GNU dd originally written by Paul Rubin, David MacKenzie, and Stuart Kemp. */
#ifndef HASH_H
#define HASH_H
#include "dcfldd.h"
#include "md5.h"
#include "sha1.h"
#include "sha2.h"
#include <sys/types.h>
#include <stdio.h>
/* bytes_in_window and bytes_in_total are only used for dd_copy() */
extern off_t bytes_in_window;
extern off_t bytes_in_total;
extern void (*hashinit)(void *);
extern void (*hashupdate)(void *, const void *, size_t);
extern void (*hashfinal)(void *, void *);
extern void *hashstr_buf;
extern size_t hashstr_buf_size;
typedef uint32_t hashflag_t;
extern hashflag_t hashflags;
typedef struct hashtype
{
char *name;
hashflag_t flag;
void *window_context;
void *total_context;
void *vwindow_context;
void *vtotal_context;
void (*init)(void *);
void (*update)(void *, const void *, size_t);
void (*final)(void *, void *);
void *hashstr_buf;
size_t hashstr_buf_size;
FILE *log;
} hashtype_t;
typedef struct hashlist_s
{
struct hashlist_s *next;
hashtype_t *hash;
} hashlist_t;
extern hashlist_t *ihashlist;
extern struct hashtype hashops[];
extern FILE *hash_log;
/* this enum order must correspond to their position in the hashops[] array */
enum {MD5 = 0, SHA1, SHA256, SHA384, SHA512};
enum {WINDOW_CTX, TOTAL_CTX, VWINDOW_CTX, VTOTAL_CTX};
#ifndef VERIFY_HASH
#define VERIFY_HASH MD5
#endif
#ifndef DEFAULT_HASH
#define DEFAULT_HASH MD5
#endif
extern off_t bytes_in_window;
extern off_t bytes_in_total;
extern off_t hash_windowlen;
extern off_t window_beginning;
extern void display_windowhash(hashlist_t *, off_t);
extern void display_totalhash(hashlist_t *, int);
extern void hash_update(hashlist_t *, void *, size_t);
extern void hash_update_buf(hashlist_t *, int, int, void *, size_t);
extern void hash_remainder(hashlist_t *, int);
extern void init_hashlist(hashlist_t **hashlist, hashflag_t flags);
/* inner hashl_* funcitons are for iterating over hashlists */
extern void hashl_init(hashlist_t *, int);
extern void hashl_update(hashlist_t *, int, const void *, size_t);
extern void hashl_final(hashlist_t *, int);
#endif /* HASH_H */
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