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/*
* Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE OR CONTRIBUTORS 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.
*/
/* $Id: otp.h,v 1.19 2000/07/12 00:26:43 assar Exp $ */
#ifndef _OTP_H
#define _OTP_H
#include <stdlib.h>
#include <time.h>
enum {OTPKEYSIZE = 8};
typedef unsigned char OtpKey[OTPKEYSIZE];
#define OTP_MIN_PASSPHRASE 10
#define OTP_MAX_PASSPHRASE 63
#define OTP_USER_TIMEOUT 120
#define OTP_DB_TIMEOUT 60
#define OTP_HEXPREFIX "hex:"
#define OTP_WORDPREFIX "word:"
typedef enum { OTP_ALG_MD4, OTP_ALG_MD5, OTP_ALG_SHA } OtpAlgID;
#define OTP_ALG_DEFAULT "md5"
typedef struct {
OtpAlgID id;
char *name;
int hashsize;
int (*hash)(const char *s, size_t len, unsigned char *res);
int (*init)(OtpKey key, const char *pwd, const char *seed);
int (*next)(OtpKey key);
} OtpAlgorithm;
typedef struct {
char *user;
OtpAlgorithm *alg;
unsigned n;
char seed[17];
OtpKey key;
int challengep;
time_t lock_time;
char *err;
} OtpContext;
OtpAlgorithm *otp_find_alg (char *name);
void otp_print_stddict (OtpKey key, char *str, size_t sz);
void otp_print_hex (OtpKey key, char *str, size_t sz);
void otp_print_stddict_extended (OtpKey key, char *str, size_t sz);
void otp_print_hex_extended (OtpKey key, char *str, size_t sz);
unsigned otp_checksum (OtpKey key);
int otp_parse_hex (OtpKey key, const char *);
int otp_parse_stddict (OtpKey key, const char *);
int otp_parse_altdict (OtpKey key, const char *, OtpAlgorithm *);
int otp_parse (OtpKey key, const char *, OtpAlgorithm *);
int otp_challenge (OtpContext *ctx, char *user, char *str, size_t len);
int otp_verify_user (OtpContext *ctx, const char *passwd);
int otp_verify_user_1 (OtpContext *ctx, const char *passwd);
char *otp_error (OtpContext *ctx);
void *otp_db_open (void);
void otp_db_close (void *);
int otp_put (void *, OtpContext *ctx);
int otp_get (void *, OtpContext *ctx);
int otp_simple_get (void *, OtpContext *ctx);
int otp_delete (void *, OtpContext *ctx);
#endif /* _OTP_H */
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