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Damien Millerd94e5492002-09-27 13:25:58 +10001/* $OpenBSD: auth.h,v 1.41 2002/09/26 11:38:43 markus Exp $ */
Damien Miller4f9f42a2003-05-10 19:28:02 +10002/* $FreeBSD: src/crypto/openssh/auth.h,v 1.10 2003/03/31 13:45:36 des Exp $ */
Ben Lindstrom05764b92002-03-05 01:53:02 +00003
Damien Millere4340be2000-09-16 13:29:08 +11004/*
5 * Copyright (c) 2000 Markus Friedl. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Ben Lindstrom4dccfa52000-12-28 16:40:05 +000026 *
Damien Millere4340be2000-09-16 13:29:08 +110027 */
Ben Lindstrom05764b92002-03-05 01:53:02 +000028
Damien Millerb38eff82000-04-01 11:09:21 +100029#ifndef AUTH_H
30#define AUTH_H
31
Ben Lindstrom83647ce2001-06-25 04:30:16 +000032#include "key.h"
33#include "hostfile.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000034#include <openssl/rsa.h>
35
Damien Miller60396b02001-02-18 17:01:00 +110036#ifdef HAVE_LOGIN_CAP
37#include <login_cap.h>
38#endif
39#ifdef BSD_AUTH
40#include <bsd_auth.h>
41#endif
Ben Lindstromec95ed92001-07-04 04:21:14 +000042#ifdef KRB5
43#include <krb5.h>
44#endif
Damien Miller60396b02001-02-18 17:01:00 +110045
Damien Miller874d77b2000-10-14 16:23:11 +110046typedef struct Authctxt Authctxt;
Ben Lindstrom511bb242002-06-06 20:52:37 +000047typedef struct Authmethod Authmethod;
Ben Lindstrom551ea372001-06-05 18:56:16 +000048typedef struct KbdintDevice KbdintDevice;
49
Damien Miller874d77b2000-10-14 16:23:11 +110050struct Authctxt {
Ben Lindstromec95ed92001-07-04 04:21:14 +000051 int success;
52 int postponed;
53 int valid;
54 int attempt;
55 int failures;
56 char *user;
57 char *service;
58 struct passwd *pw;
59 char *style;
60 void *kbdintctxt;
Damien Miller60396b02001-02-18 17:01:00 +110061#ifdef BSD_AUTH
Ben Lindstromec95ed92001-07-04 04:21:14 +000062 auth_session_t *as;
63#endif
64#ifdef KRB4
65 char *krb4_ticket_file;
66#endif
67#ifdef KRB5
68 krb5_context krb5_ctx;
69 krb5_auth_context krb5_auth_ctx;
70 krb5_ccache krb5_fwd_ccache;
71 krb5_principal krb5_user;
72 char *krb5_ticket_file;
Damien Miller60396b02001-02-18 17:01:00 +110073#endif
Damien Miller874d77b2000-10-14 16:23:11 +110074};
75
Ben Lindstrom511bb242002-06-06 20:52:37 +000076struct Authmethod {
77 char *name;
78 int (*userauth)(Authctxt *authctxt);
79 int *enabled;
80};
81
Ben Lindstrom226cfa02001-01-22 05:34:40 +000082/*
Ben Lindstrom551ea372001-06-05 18:56:16 +000083 * Keyboard interactive device:
Damien Miller9f0f5c62001-12-21 14:45:46 +110084 * init_ctx returns: non NULL upon success
85 * query returns: 0 - success, otherwise failure
Ben Lindstrom551ea372001-06-05 18:56:16 +000086 * respond returns: 0 - success, 1 - need further interaction,
87 * otherwise - failure
88 */
89struct KbdintDevice
90{
91 const char *name;
Damien Millerb0462112002-02-19 15:24:43 +110092 void* (*init_ctx)(Authctxt*);
Damien Millera93c6d82002-02-19 15:25:29 +110093 int (*query)(void *ctx, char **name, char **infotxt,
94 u_int *numprompts, char ***prompts, u_int **echo_on);
Damien Millerb0462112002-02-19 15:24:43 +110095 int (*respond)(void *ctx, u_int numresp, char **responses);
96 void (*free_ctx)(void *ctx);
Ben Lindstrom551ea372001-06-05 18:56:16 +000097};
98
Ben Lindstrom08105192002-03-22 02:50:06 +000099int auth_rhosts(struct passwd *, const char *);
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000100int
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000101auth_rhosts2(struct passwd *, const char *, const char *, const char *);
Ben Lindstrom5eabda32001-04-12 23:34:34 +0000102
Ben Lindstrom186b7da2002-03-22 01:20:32 +0000103int auth_rhosts_rsa(struct passwd *, char *, Key *);
Ben Lindstrom4cc240d2001-07-04 04:46:56 +0000104int auth_password(Authctxt *, const char *);
105int auth_rsa(struct passwd *, BIGNUM *);
Ben Lindstrom9c8aefe2002-03-22 01:12:58 +0000106int auth_rsa_challenge_dialog(Key *);
Ben Lindstrom08105192002-03-22 02:50:06 +0000107BIGNUM *auth_rsa_generate_challenge(Key *);
108int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]);
109int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
110
111int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
112int hostbased_key_allowed(struct passwd *, const char *, char *, Key *);
113int user_key_allowed(struct passwd *, Key *);
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000114
115#ifdef KRB4
116#include <krb.h>
Damien Millerd94e5492002-09-27 13:25:58 +1000117int auth_krb4(Authctxt *, KTEXT, char **, KTEXT);
Ben Lindstromec95ed92001-07-04 04:21:14 +0000118int auth_krb4_password(Authctxt *, const char *);
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000119void krb4_cleanup_proc(void *);
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000120
121#ifdef AFS
122#include <kafs.h>
Ben Lindstromec95ed92001-07-04 04:21:14 +0000123int auth_krb4_tgt(Authctxt *, const char *);
124int auth_afs_token(Authctxt *, const char *);
Ben Lindstrom4cc240d2001-07-04 04:46:56 +0000125#endif /* AFS */
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000126
Ben Lindstrom4cc240d2001-07-04 04:46:56 +0000127#endif /* KRB4 */
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000128
Ben Lindstromec95ed92001-07-04 04:21:14 +0000129#ifdef KRB5
Damien Miller25162f22002-09-12 09:47:29 +1000130int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *);
Ben Lindstromec95ed92001-07-04 04:21:14 +0000131int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
132int auth_krb5_password(Authctxt *authctxt, const char *password);
133void krb5_cleanup_proc(void *authctxt);
134#endif /* KRB5 */
135
Damien Millerb8481582000-12-03 11:51:51 +1100136#include "auth-pam.h"
Damien Millerb8481582000-12-03 11:51:51 +1100137
Ben Lindstrom73ab9ba2002-03-22 01:27:35 +0000138Authctxt *do_authentication(void);
139Authctxt *do_authentication2(void);
Damien Millerefb4afe2000-04-12 18:45:05 +1000140
Ben Lindstromdb65e8f2001-01-19 04:26:52 +0000141Authctxt *authctxt_new(void);
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000142void auth_log(Authctxt *, int, char *, char *);
143void userauth_finish(Authctxt *, int, char *);
144int auth_root_allowed(char *);
Damien Millerb38eff82000-04-01 11:09:21 +1000145
Damien Miller5ad9fd92002-05-13 11:07:41 +1000146char *auth2_read_banner(void);
147
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000148void privsep_challenge_enable(void);
149
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000150int auth2_challenge(Authctxt *, char *);
Damien Milleree116252001-12-21 12:42:34 +1100151void auth2_challenge_stop(Authctxt *);
Ben Lindstrom08105192002-03-22 02:50:06 +0000152int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
153int bsdauth_respond(void *, u_int, char **);
154int skey_query(void *, char **, char **, u_int *, char ***, u_int **);
155int skey_respond(void *, u_int, char **);
Damien Miller874d77b2000-10-14 16:23:11 +1100156
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000157int allowed_user(struct passwd *);
Ben Lindstrom2ae18f42002-03-22 01:24:38 +0000158struct passwd * getpwnamallow(const char *user);
Ben Lindstromdb65e8f2001-01-19 04:26:52 +0000159
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000160char *get_challenge(Authctxt *);
161int verify_response(Authctxt *, const char *);
Damien Miller4f9f42a2003-05-10 19:28:02 +1000162void abandon_challenge_response(Authctxt *);
Ben Lindstromdb65e8f2001-01-19 04:26:52 +0000163
Damien Miller874d77b2000-10-14 16:23:11 +1100164struct passwd * auth_get_user(void);
Damien Millereba71ba2000-04-29 23:57:08 +1000165
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000166char *expand_filename(const char *, struct passwd *);
167char *authorized_keys_file(struct passwd *);
168char *authorized_keys_file2(struct passwd *);
Ben Lindstrombfb3a0e2001-06-05 20:25:05 +0000169
Ben Lindstrombfb3a0e2001-06-05 20:25:05 +0000170int
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000171secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
Ben Lindstrombfb3a0e2001-06-05 20:25:05 +0000172
Ben Lindstrom83647ce2001-06-25 04:30:16 +0000173HostStatus
Ben Lindstrom16ae3d02001-07-04 04:02:36 +0000174check_key_in_hostfiles(struct passwd *, Key *, const char *,
175 const char *, const char *);
Ben Lindstrom83647ce2001-06-25 04:30:16 +0000176
Ben Lindstrom08105192002-03-22 02:50:06 +0000177/* hostkey handling */
178Key *get_hostkey_by_index(int);
179Key *get_hostkey_by_type(int);
180int get_hostkey_index(Key *);
181int ssh1_session_key(BIGNUM *);
182
Ben Lindstroma574cda2002-05-15 16:16:14 +0000183/* debug messages during authentication */
184void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2)));
185void auth_debug_send(void);
186void auth_debug_reset(void);
187
Damien Millereba71ba2000-04-29 23:57:08 +1000188#define AUTH_FAIL_MAX 6
189#define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
190#define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
191
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000192#define SKEY_PROMPT "\nS/Key Password: "
Damien Millerb38eff82000-04-01 11:09:21 +1000193#endif