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