/*
 * Copyright (c) 1996-2007, OpenFWTK Development Group
 * All rights reserved. See LICENSE.
 */

/*
 * S/KEY 
 *
 * Main client header
 *
 * $OpenBSD: skey.h,v 1.12 1998/07/03 02:06:21 angelos Exp $
 */

/* Maximum sequence number we allow */
#ifndef SKEY_MAX_SEQ
#define SKEY_MAX_SEQ		10000
#endif

/* Minimum secret password length (rfc1938) */
#ifndef SKEY_MIN_PW_LEN
#define SKEY_MIN_PW_LEN		10
#endif

/* Max secret password length (rfc1938 says 63 but allows more) */
#ifndef SKEY_MAX_PW_LEN
#define SKEY_MAX_PW_LEN		255
#endif

/* Max length of an S/Key seed (rfc1938) */
#ifndef SKEY_MAX_SEED_LEN
#define SKEY_MAX_SEED_LEN	16
#endif

/* Max length of S/Key challenge (otp-???? 9999 seed) */
#ifndef SKEY_MAX_CHALLENGE
#define SKEY_MAX_CHALLENGE	(11 + SKEY_MAX_HASHNAME_LEN + SKEY_MAX_SEED_LEN)
#endif

/* Max length of hash algorithm name (md4/md5/sha1/rmd160) */
#define SKEY_MAX_HASHNAME_LEN	6

/* Size of a binary key (not NULL-terminated) */
#define SKEY_BINKEY_SIZE	8

/* Location of random file for bogus challenges */
#define _SKEY_RAND_FILE_PATH_	"/etc/host.random"

/* Prototypes */
void f(char *x);
int keycrunch(char *result, char *seed, char *passwd);
char *btoe(char *engout, char *c);
char *put8(char *out, char *s);
int etob(char *out, char *e);
void rip(char *buf);
void sevenbit(char *s);
void backspace(char *s);
char *skipspace(char *s);
int atob8(char *out, char *in);
int btoa8(char *out, char *in);
int htoi(int c);
const char *skey_get_algorithm(void);
char *skey_set_algorithm(char *new);