auth.h revision 76262 
1/*
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.
23 *
24 * $OpenBSD: auth.h,v 1.15 2001/04/12 19:15:24 markus Exp $
25 * $FreeBSD: head/crypto/openssh/auth.h 76262 2001-05-04 04:14:23Z green $
26 */
27#ifndef AUTH_H
28#define AUTH_H
29
30#include <openssl/rsa.h>
31
32#ifdef HAVE_LOGIN_CAP
33#include <login_cap.h>
34#endif
35#ifdef BSD_AUTH
36#include <bsd_auth.h>
37#endif
38
39typedef struct Authctxt Authctxt;
40struct Authctxt {
41	int success;
42	int postponed;
43	int valid;
44	int attempt;
45	int failures;
46	char *user;
47	char *service;
48	struct passwd *pw;
49	char *style;
50#ifdef BSD_AUTH
51	auth_session_t *as;
52#endif
53};
54
55/*
56 * Tries to authenticate the user using the .rhosts file.  Returns true if
57 * authentication succeeds.  If ignore_rhosts is non-zero, this will not
58 * consider .rhosts and .shosts (/etc/hosts.equiv will still be used).
59 */
60int     auth_rhosts(struct passwd * pw, const char *client_user);
61
62/* extended interface similar to auth_rhosts() */
63int
64auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname,
65    const char *ipaddr);
66
67/*
68 * Tries to authenticate the user using the .rhosts file and the host using
69 * its host key.  Returns true if authentication succeeds.
70 */
71int
72auth_rhosts_rsa(struct passwd * pw, const char *client_user, RSA* client_host_key);
73
74/*
75 * Tries to authenticate the user using password.  Returns true if
76 * authentication succeeds.
77 */
78int     auth_password(Authctxt *authctxt, const char *password);
79
80/*
81 * Performs the RSA authentication dialog with the client.  This returns 0 if
82 * the client could not be authenticated, and 1 if authentication was
83 * successful.  This may exit if there is a serious protocol violation.
84 */
85int     auth_rsa(struct passwd * pw, BIGNUM * client_n);
86
87/*
88 * Parses an RSA key (number of bits, e, n) from a string.  Moves the pointer
89 * over the key.  Skips any whitespace at the beginning and at end.
90 */
91int     auth_rsa_read_key(char **cpp, u_int *bitsp, BIGNUM * e, BIGNUM * n);
92
93/*
94 * Performs the RSA authentication challenge-response dialog with the client,
95 * and returns true (non-zero) if the client gave the correct answer to our
96 * challenge; returns zero if the client gives a wrong answer.
97 */
98int     auth_rsa_challenge_dialog(RSA *pk);
99
100#ifdef KRB5
101#include <krb5.h>
102int auth_krb5();  /* XXX Doplnit prototypy */
103int auth_krb5_tgt();
104int krb5_init();
105void    krb5_cleanup_proc(void *ignore);
106int auth_krb5_password(struct passwd *pw, const char *password);
107#endif /* KRB5 */
108
109#ifdef KRB4
110#include <krb.h>
111/*
112 * Performs Kerberos v4 mutual authentication with the client. This returns 0
113 * if the client could not be authenticated, and 1 if authentication was
114 * successful.  This may exit if there is a serious protocol violation.
115 */
116int     auth_krb4(const char *server_user, KTEXT auth, char **client);
117int     krb4_init(uid_t uid);
118void    krb4_cleanup_proc(void *ignore);
119int	auth_krb4_password(struct passwd * pw, const char *password);
120
121#ifdef AFS
122#include <kafs.h>
123
124/* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */
125int     auth_kerberos_tgt(struct passwd * pw, const char *string);
126int     auth_afs_token(struct passwd * pw, const char *token_string);
127#endif				/* AFS */
128
129#endif				/* KRB4 */
130
131void	do_authentication(void);
132void	do_authentication2(void);
133
134Authctxt *authctxt_new(void);
135void	auth_log(Authctxt *authctxt, int authenticated, char *method, char *info);
136void	userauth_finish(Authctxt *authctxt, int authenticated, char *method);
137int	auth_root_allowed(char *method);
138
139int	auth2_challenge(Authctxt *authctxt, char *devs);
140
141int	allowed_user(struct passwd * pw);
142
143char	*get_challenge(Authctxt *authctxt, char *devs);
144int	verify_response(Authctxt *authctxt, char *response);
145
146struct passwd * auth_get_user(void);
147
148#define AUTH_FAIL_MAX 6
149#define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
150#define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
151
152#endif
153