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/*
* OTP Utilities
* Copyright (C) 2020 David M. Syzdek <david@syzdek.net>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of David M. Syzdek nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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 DAVID M SYZDEK 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 lib/libotputil/libotputil.h
*/
#ifndef _LIB_LIBOTPUTIL_LIBOTPUTIL_H
#define _LIB_LIBOTPUTIL_LIBOTPUTIL_H 1
///////////////
// //
// Headers //
// //
///////////////
#pragma mark - Headers
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <assert.h>
#include <time.h>
#include <otputil.h>
#ifdef HAVE_BINDLE_PREFIX_H
# include <bindle_prefix.h>
#else
# include <bindle.h>
#endif
/////////////////
// //
// Datatypes //
// //
/////////////////
#pragma mark - Datatypes
// format of TOTP secret (RFC 6238)
// k:t0:tx:hmac:desc
//
// format of HOTP secret (RFC 4226)
// k:c:0:hmac:desc
struct _otputil_secret
{
int32_t otp_method;
int8_t hotp_digits;
int8_t hotp_hmac;
int8_t totp_digits;
int8_t totp_hmac;
char * otp_desc; // description of secret
otputil_bv_t * totp_k;
otputil_bv_t * hotp_k;
uint64_t hotp_c;
uint64_t totp_time; // current Unix time
uint64_t totp_t0; // Unix time from which to start counting time steps
uint64_t totp_tx; // step in seconds
};
typedef struct _otputil_map otputil_map_t;
struct _otputil_map
{
const char * map_name;
int map_id;
int intpad;
};
/////////////////
// //
// Variables //
// //
/////////////////
#pragma mark - Variables
extern const char * otputil_dict_rfc1760[];
//////////////////
// //
// Prototypes //
// //
//////////////////
#pragma mark - Prototypes
#endif /* end of header file */
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