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/*
* Copyright (c) 2000 Markus Friedl. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* $OpenBSD: auth.h,v 1.22 2001/06/26 17:27:22 markus Exp $
*/
#ifndef AUTH_H
#define AUTH_H
#include "key.h"
#include "hostfile.h"
#include <openssl/rsa.h>
#ifdef HAVE_LOGIN_CAP
#include <login_cap.h>
#endif
#ifdef BSD_AUTH
#include <bsd_auth.h>
#endif
#ifdef KRB5
#include <krb5.h>
#endif
typedef struct Authctxt Authctxt;
typedef struct KbdintDevice KbdintDevice;
struct Authctxt {
int success;
int postponed;
int valid;
int attempt;
int failures;
char *user;
char *service;
struct passwd *pw;
char *style;
void *kbdintctxt;
#ifdef BSD_AUTH
auth_session_t *as;
#endif
#ifdef KRB4
char *krb4_ticket_file;
#endif
#ifdef KRB5
krb5_context krb5_ctx;
krb5_auth_context krb5_auth_ctx;
krb5_ccache krb5_fwd_ccache;
krb5_principal krb5_user;
char *krb5_ticket_file;
#endif
};
/*
* Keyboard interactive device:
* init_ctx returns: non NULL upon success
* query returns: 0 - success, otherwise failure
* respond returns: 0 - success, 1 - need further interaction,
* otherwise - failure
*/
struct KbdintDevice
{
const char *name;
void* (*init_ctx) __P((Authctxt*));
int (*query) __P((void *ctx, char **name, char **infotxt,
u_int *numprompts, char ***prompts,
u_int **echo_on));
int (*respond) __P((void *ctx, u_int numresp, char **responses));
void (*free_ctx) __P((void *ctx));
};
int auth_rhosts(struct passwd *, const char *);
int
auth_rhosts2(struct passwd *, const char *, const char *, const char *);
int auth_rhosts_rsa(struct passwd *, const char *, RSA *);
int auth_password(Authctxt *, const char *);
int auth_rsa(struct passwd *, BIGNUM *);
int auth_rsa_read_key(char **, u_int *, BIGNUM *, BIGNUM *);
int auth_rsa_challenge_dialog(RSA *);
#ifdef KRB4
#include <krb.h>
int auth_krb4(Authctxt *, KTEXT, char **);
int auth_krb4_password(Authctxt *, const char *);
void krb4_cleanup_proc(void *);
#ifdef AFS
#include <kafs.h>
int auth_krb4_tgt(Authctxt *, const char *);
int auth_afs_token(Authctxt *, const char *);
#endif /* AFS */
#endif /* KRB4 */
#ifdef KRB5
int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client);
int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
int auth_krb5_password(Authctxt *authctxt, const char *password);
void krb5_cleanup_proc(void *authctxt);
#endif /* KRB5 */
void do_authentication(void);
void do_authentication2(void);
Authctxt *authctxt_new(void);
void auth_log(Authctxt *, int, char *, char *);
void userauth_finish(Authctxt *, int, char *);
int auth_root_allowed(char *);
int auth2_challenge(Authctxt *, char *);
int allowed_user(struct passwd *);
char *get_challenge(Authctxt *);
int verify_response(Authctxt *, const char *);
struct passwd * auth_get_user(void);
char *expand_filename(const char *, struct passwd *);
char *authorized_keys_file(struct passwd *);
char *authorized_keys_file2(struct passwd *);
int
secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
HostStatus
check_key_in_hostfiles(struct passwd *, Key *, const char *,
const char *, const char *);
#define AUTH_FAIL_MAX 6
#define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
#define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
#endif
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