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Damien Millere4340be2000-09-16 13:29:08 +11001/*
2 * Copyright (c) 2000 Markus Friedl. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Ben Lindstrom4dccfa52000-12-28 16:40:05 +000023 *
Damien Millerd221ca62002-01-22 23:11:00 +110024 * $OpenBSD: auth.h,v 1.26 2001/12/27 19:54:53 markus Exp $
Damien Millere4340be2000-09-16 13:29:08 +110025 */
Damien Millerb38eff82000-04-01 11:09:21 +100026#ifndef AUTH_H
27#define AUTH_H
28
Ben Lindstrom83647ce2001-06-25 04:30:16 +000029#include "key.h"
30#include "hostfile.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000031#include <openssl/rsa.h>
32
Damien Miller60396b02001-02-18 17:01:00 +110033#ifdef HAVE_LOGIN_CAP
34#include <login_cap.h>
35#endif
36#ifdef BSD_AUTH
37#include <bsd_auth.h>
38#endif
Ben Lindstromec95ed92001-07-04 04:21:14 +000039#ifdef KRB5
40#include <krb5.h>
41#endif
Damien Miller60396b02001-02-18 17:01:00 +110042
Damien Miller874d77b2000-10-14 16:23:11 +110043typedef struct Authctxt Authctxt;
Ben Lindstrom551ea372001-06-05 18:56:16 +000044typedef struct KbdintDevice KbdintDevice;
45
Damien Miller874d77b2000-10-14 16:23:11 +110046struct Authctxt {
Ben Lindstromec95ed92001-07-04 04:21:14 +000047 int success;
48 int postponed;
49 int valid;
50 int attempt;
51 int failures;
52 char *user;
53 char *service;
54 struct passwd *pw;
55 char *style;
56 void *kbdintctxt;
Damien Miller60396b02001-02-18 17:01:00 +110057#ifdef BSD_AUTH
Ben Lindstromec95ed92001-07-04 04:21:14 +000058 auth_session_t *as;
59#endif
60#ifdef KRB4
61 char *krb4_ticket_file;
62#endif
63#ifdef KRB5
64 krb5_context krb5_ctx;
65 krb5_auth_context krb5_auth_ctx;
66 krb5_ccache krb5_fwd_ccache;
67 krb5_principal krb5_user;
68 char *krb5_ticket_file;
Damien Miller60396b02001-02-18 17:01:00 +110069#endif
Damien Miller874d77b2000-10-14 16:23:11 +110070};
71
Ben Lindstrom226cfa02001-01-22 05:34:40 +000072/*
Ben Lindstrom551ea372001-06-05 18:56:16 +000073 * Keyboard interactive device:
Damien Miller9f0f5c62001-12-21 14:45:46 +110074 * init_ctx returns: non NULL upon success
75 * query returns: 0 - success, otherwise failure
Ben Lindstrom551ea372001-06-05 18:56:16 +000076 * respond returns: 0 - success, 1 - need further interaction,
77 * otherwise - failure
78 */
79struct KbdintDevice
80{
81 const char *name;
82 void* (*init_ctx) __P((Authctxt*));
83 int (*query) __P((void *ctx, char **name, char **infotxt,
84 u_int *numprompts, char ***prompts,
85 u_int **echo_on));
86 int (*respond) __P((void *ctx, u_int numresp, char **responses));
87 void (*free_ctx) __P((void *ctx));
88};
89
Ben Lindstrom16ae3d02001-07-04 04:02:36 +000090int auth_rhosts(struct passwd *, const char *);
Ben Lindstrom5eabda32001-04-12 23:34:34 +000091int
Ben Lindstrom16ae3d02001-07-04 04:02:36 +000092auth_rhosts2(struct passwd *, const char *, const char *, const char *);
Ben Lindstrom5eabda32001-04-12 23:34:34 +000093
Damien Millerd221ca62002-01-22 23:11:00 +110094int auth_rhosts_rsa(struct passwd *, const char *, Key *);
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000095int auth_password(Authctxt *, const char *);
96int auth_rsa(struct passwd *, BIGNUM *);
Ben Lindstrom4cc240d2001-07-04 04:46:56 +000097int auth_rsa_challenge_dialog(RSA *);
Ben Lindstrom226cfa02001-01-22 05:34:40 +000098
99#ifdef KRB4
100#include <krb.h>
Ben Lindstromec95ed92001-07-04 04:21:14 +0000101int auth_krb4(Authctxt *, KTEXT, char **);
102int auth_krb4_password(Authctxt *, const char *);
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000103void krb4_cleanup_proc(void *);
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000104
105#ifdef AFS
106#include <kafs.h>
Ben Lindstromec95ed92001-07-04 04:21:14 +0000107int auth_krb4_tgt(Authctxt *, const char *);
108int auth_afs_token(Authctxt *, const char *);
Ben Lindstrom4cc240d2001-07-04 04:46:56 +0000109#endif /* AFS */
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000110
Ben Lindstrom4cc240d2001-07-04 04:46:56 +0000111#endif /* KRB4 */
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000112
Ben Lindstromec95ed92001-07-04 04:21:14 +0000113#ifdef KRB5
114int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client);
115int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
116int auth_krb5_password(Authctxt *authctxt, const char *password);
117void krb5_cleanup_proc(void *authctxt);
118#endif /* KRB5 */
119
Damien Millerb8481582000-12-03 11:51:51 +1100120#include "auth-pam.h"
121#include "auth2-pam.h"
122
Damien Millerb38eff82000-04-01 11:09:21 +1000123void do_authentication(void);
Damien Millerefb4afe2000-04-12 18:45:05 +1000124void do_authentication2(void);
125
Ben Lindstromdb65e8f2001-01-19 04:26:52 +0000126Authctxt *authctxt_new(void);
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000127void auth_log(Authctxt *, int, char *, char *);
128void userauth_finish(Authctxt *, int, char *);
129int auth_root_allowed(char *);
Damien Millerb38eff82000-04-01 11:09:21 +1000130
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000131int auth2_challenge(Authctxt *, char *);
Damien Milleree116252001-12-21 12:42:34 +1100132void auth2_challenge_stop(Authctxt *);
Damien Miller874d77b2000-10-14 16:23:11 +1100133
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000134int allowed_user(struct passwd *);
Ben Lindstromdb65e8f2001-01-19 04:26:52 +0000135
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000136char *get_challenge(Authctxt *);
137int verify_response(Authctxt *, const char *);
Ben Lindstromdb65e8f2001-01-19 04:26:52 +0000138
Damien Miller874d77b2000-10-14 16:23:11 +1100139struct passwd * auth_get_user(void);
Damien Millereba71ba2000-04-29 23:57:08 +1000140
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000141char *expand_filename(const char *, struct passwd *);
142char *authorized_keys_file(struct passwd *);
143char *authorized_keys_file2(struct passwd *);
Ben Lindstrombfb3a0e2001-06-05 20:25:05 +0000144
Ben Lindstrombfb3a0e2001-06-05 20:25:05 +0000145int
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000146secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
Ben Lindstrombfb3a0e2001-06-05 20:25:05 +0000147
Ben Lindstrom83647ce2001-06-25 04:30:16 +0000148HostStatus
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000149check_key_in_hostfiles(struct passwd *, Key *, const char *,
150 const char *, const char *);
Ben Lindstrom83647ce2001-06-25 04:30:16 +0000151
Damien Millereba71ba2000-04-29 23:57:08 +1000152#define AUTH_FAIL_MAX 6
153#define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
154#define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
155
Damien Millerb38eff82000-04-01 11:09:21 +1000156#endif