/*
 *****************************************************************************
 *
 * File:    fko_util.h
 *
 * Author:  Damien S. Stuart
 *
 * Purpose: Header for utility functions used by libfko
 *
 * Copyright 2009-2013 Damien Stuart (dstuart@dstuart.org)
 *
 *  License (GNU General Public License):
 *
 *  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
 *  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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *****************************************************************************
*/
#ifndef FKO_UTIL_H
#define FKO_UTIL_H 1

/* Function prototypes
*/
int     is_valid_encoded_msg_len(const int len);
int     is_valid_pt_msg_len(const int len);
int     is_valid_digest_len(const int len);
int     enc_mode_strtoint(const char *enc_mode_str);
short   enc_mode_inttostr(int enc_mode, char* enc_mode_str, size_t enc_mode_size);
int     strtol_wrapper(const char * const str, const int min,
            const int max, const int exit_upon_err, int *is_err);
short   digest_strtoint(const char *dt_str);
short   digest_inttostr(int digest, char* digest_str, size_t digest_size);
short   hmac_digest_strtoint(const char *dt_str);
short   hmac_digest_inttostr(int digest, char* digest_str, size_t digest_size);
int     constant_runtime_cmp(const char *a, const char *b, int len);
int     zero_free(char *buf, int len);
int     zero_buf(char *buf, int len);

const char * enc_type_inttostr(const int type);
const char * msg_type_inttostr(const int type);

size_t  strlcat(char *dst, const char *src, size_t siz);
size_t  strlcpy(char *dst, const char *src, size_t siz);

#if defined(WIN32) || !defined(HAVE_STRNDUP)
char * strndup( const char * s, size_t len );
#endif

#endif /* FKO_UTIL_H */

/***EOF***/