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;
74 char *session_env_file;
81 int (*userauth)(Authctxt *authctxt);
86 * Keyboard interactive device:
87 * init_ctx returns: non NULL upon success
88 * query returns: 0 - success, otherwise failure
89 * respond returns: 0 - success, 1 - need further interaction,
95 void* (*init_ctx)(Authctxt*);
96 int (*query)(void *ctx, char **name, char **infotxt,
97 u_int *numprompts, char ***prompts, u_int **echo_on);
98 int (*respond)(void *ctx, u_int numresp, char **responses);
99 void (*free_ctx)(void *ctx);
102 int auth_rhosts(struct passwd *, const char *);
104 auth_rhosts2(struct passwd *, const char *, const char *, const char *);
106 int auth_rhosts_rsa(struct passwd *, char *, Key *);
107 int auth_password(Authctxt *, const char *);
108 int auth_rsa(struct passwd *, BIGNUM *);
109 int auth_rsa_challenge_dialog(Key *);
110 BIGNUM *auth_rsa_generate_challenge(Key *);
111 int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]);
112 int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **);
114 int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *);
115 int hostbased_key_allowed(struct passwd *, const char *, char *, Key *);
116 int user_key_allowed(struct passwd *, Key *);
120 int auth_krb4(Authctxt *, KTEXT, char **, KTEXT);
121 int auth_krb4_password(Authctxt *, const char *);
122 void krb4_cleanup_proc(void *);
126 int auth_krb4_tgt(Authctxt *, const char *);
127 int auth_afs_token(Authctxt *, const char *);
133 int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *);
134 int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
135 int auth_krb5_password(Authctxt *authctxt, const char *password);
136 void krb5_cleanup_proc(void *authctxt);
139 #include "auth-pam.h"
140 #include "auth2-pam.h"
142 Authctxt *do_authentication(void);
143 Authctxt *do_authentication2(void);
145 Authctxt *authctxt_new(void);
146 void auth_log(Authctxt *, int, char *, char *);
147 void userauth_finish(Authctxt *, int, char *);
148 int auth_root_allowed(char *);
150 char *auth2_read_banner(void);
152 void privsep_challenge_enable(void);
154 int auth2_challenge(Authctxt *, char *);
155 void auth2_challenge_stop(Authctxt *);
156 int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **);
157 int bsdauth_respond(void *, u_int, char **);
158 int skey_query(void *, char **, char **, u_int *, char ***, u_int **);
159 int skey_respond(void *, u_int, char **);
161 int allowed_user(struct passwd *);
162 struct passwd * getpwnamallow(const char *user);
164 char *get_challenge(Authctxt *);
165 int verify_response(Authctxt *, const char *);
167 struct passwd * auth_get_user(void);
169 char *expand_filename(const char *, struct passwd *);
170 char *authorized_keys_file(struct passwd *);
171 char *authorized_keys_file2(struct passwd *);
174 secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
177 check_key_in_hostfiles(struct passwd *, Key *, const char *,
178 const char *, const char *);
180 /* hostkey handling */
181 Key *get_hostkey_by_index(int);
182 Key *get_hostkey_by_type(int);
183 int get_hostkey_index(Key *);
184 int ssh1_session_key(BIGNUM *);
186 /* debug messages during authentication */
187 void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2)));
188 void auth_debug_send(void);
189 void auth_debug_reset(void);
191 #define AUTH_FAIL_MAX 6
192 #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
193 #define AUTH_FAIL_MSG "Too many authentication failures for %.100s"
195 #define SKEY_PROMPT "\nS/Key Password: "