1 /* $OpenBSD: auth.h,v 1.41 2002/09/26 11:38:43 markus Exp $ */
4 * Copyright (c) 2000 Markus Friedl. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <openssl/rsa.h>
36 #include <login_cap.h>
45 typedef struct Authctxt Authctxt;
46 typedef struct Authmethod Authmethod;
47 typedef struct KbdintDevice KbdintDevice;
64 char *krb4_ticket_file;
67 krb5_context krb5_ctx;
68 krb5_auth_context krb5_auth_ctx;
69 krb5_ccache krb5_fwd_ccache;
70 krb5_principal krb5_user;
71 char *krb5_ticket_file;
77 int (*userauth)(Authctxt *authctxt);
82 * Keyboard interactive device:
83 * init_ctx returns: non NULL upon success
84 * query returns: 0 - success, otherwise failure
85 * respond returns: 0 - success, 1 - need further interaction,
91 void* (*init_ctx)(Authctxt*);
92 int (*query)(void *ctx, char **name, char **infotxt,
93 u_int *numprompts, char ***prompts, u_int **echo_on);
94 int (*respond)(void *ctx, u_int numresp, char **responses);
95 void (*free_ctx)(void *ctx);
98 int auth_rhosts(struct passwd *, const char *);
100 auth_rhosts2(struct passwd *, const char *, const char *, const char *);
102 int auth_rhosts_rsa(struct passwd *, char *, Key *);
103 int auth_password(Authctxt *, const char *);
104 int auth_rsa(struct passwd *, BIGNUM *);
105 int auth_rsa_challenge_dialog(Key *);
106 BIGNUM *auth_rsa_generate_challenge(Key *);
107 int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]);
108 int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
110 int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
111 int hostbased_key_allowed(struct passwd *, const char *, char *, Key *);
112 int user_key_allowed(struct passwd *, Key *);
116 int auth_krb4(Authctxt *, KTEXT, char **, KTEXT);
117 int auth_krb4_password(Authctxt *, const char *);
118 void krb4_cleanup_proc(void *);
122 int auth_krb4_tgt(Authctxt *, const char *);
123 int auth_afs_token(Authctxt *, const char *);
129 int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *);
130 int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
131 int auth_krb5_password(Authctxt *authctxt, const char *password);
132 void krb5_cleanup_proc(void *authctxt);
135 #include "auth-pam.h"
136 #include "auth2-pam.h"
138 Authctxt *do_authentication(void);
139 Authctxt *do_authentication2(void);
141 Authctxt *authctxt_new(void);
142 void auth_log(Authctxt *, int, char *, char *);
143 void userauth_finish(Authctxt *, int, char *);
144 int auth_root_allowed(char *);
146 char *auth2_read_banner(void);
148 void privsep_challenge_enable(void);
150 int auth2_challenge(Authctxt *, char *);
151 void auth2_challenge_stop(Authctxt *);
152 int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
153 int bsdauth_respond(void *, u_int, char **);
154 int skey_query(void *, char **, char **, u_int *, char ***, u_int **);
155 int skey_respond(void *, u_int, char **);
157 int allowed_user(struct passwd *);
158 struct passwd * getpwnamallow(const char *user);
160 char *get_challenge(Authctxt *);
161 int verify_response(Authctxt *, const char *);
163 struct passwd * auth_get_user(void);
165 char *expand_filename(const char *, struct passwd *);
166 char *authorized_keys_file(struct passwd *);
167 char *authorized_keys_file2(struct passwd *);
170 secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
173 check_key_in_hostfiles(struct passwd *, Key *, const char *,
174 const char *, const char *);
176 /* hostkey handling */
177 Key *get_hostkey_by_index(int);
178 Key *get_hostkey_by_type(int);
179 int get_hostkey_index(Key *);
180 int ssh1_session_key(BIGNUM *);
182 /* debug messages during authentication */
183 void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2)));
184 void auth_debug_send(void);
185 void auth_debug_reset(void);
187 #define AUTH_FAIL_MAX 6
188 #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
189 #define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
191 #define SKEY_PROMPT "\nS/Key Password: "