2 * Copyright (c) 2000 Markus Friedl. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
24 * $OpenBSD: auth.h,v 1.21 2001/06/26 16:15:23 dugsong Exp $
31 #include <openssl/rsa.h>
34 #include <login_cap.h>
43 typedef struct Authctxt Authctxt;
44 typedef struct KbdintDevice KbdintDevice;
61 char *krb4_ticket_file;
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;
73 * Keyboard interactive device:
74 * init_ctx returns: non NULL upon success
75 * query returns: 0 - success, otherwise failure
76 * respond returns: 0 - success, 1 - need further interaction,
82 void* (*init_ctx) __P((Authctxt*));
83 int (*query) __P((void *ctx, char **name, char **infotxt,
84 u_int *numprompts, char ***prompts,
86 int (*respond) __P((void *ctx, u_int numresp, char **responses));
87 void (*free_ctx) __P((void *ctx));
91 * Tries to authenticate the user using the .rhosts file. Returns true if
92 * authentication succeeds. If ignore_rhosts is non-zero, this will not
93 * consider .rhosts and .shosts (/etc/hosts.equiv will still be used).
95 int auth_rhosts(struct passwd *, const char *);
97 /* extended interface similar to auth_rhosts() */
99 auth_rhosts2(struct passwd *, const char *, const char *, const char *);
102 * Tries to authenticate the user using the .rhosts file and the host using
103 * its host key. Returns true if authentication succeeds.
106 auth_rhosts_rsa(struct passwd *, const char *, RSA *);
109 * Tries to authenticate the user using password. Returns true if
110 * authentication succeeds.
112 int auth_password(Authctxt *, const char *);
115 * Performs the RSA authentication dialog with the client. This returns 0 if
116 * the client could not be authenticated, and 1 if authentication was
117 * successful. This may exit if there is a serious protocol violation.
119 int auth_rsa(struct passwd *, BIGNUM *);
122 * Parses an RSA key (number of bits, e, n) from a string. Moves the pointer
123 * over the key. Skips any whitespace at the beginning and at end.
125 int auth_rsa_read_key(char **, u_int *, BIGNUM *, BIGNUM *);
128 * Performs the RSA authentication challenge-response dialog with the client,
129 * and returns true (non-zero) if the client gave the correct answer to our
130 * challenge; returns zero if the client gives a wrong answer.
132 int auth_rsa_challenge_dialog(RSA *);
137 * Performs Kerberos v4 mutual authentication with the client. This returns 0
138 * if the client could not be authenticated, and 1 if authentication was
139 * successful. This may exit if there is a serious protocol violation.
141 int auth_krb4(Authctxt *, KTEXT, char **);
142 int auth_krb4_password(Authctxt *, const char *);
143 void krb4_cleanup_proc(void *);
148 /* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */
149 int auth_krb4_tgt(Authctxt *, const char *);
150 int auth_afs_token(Authctxt *, const char *);
156 int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client);
157 int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt);
158 int auth_krb5_password(Authctxt *authctxt, const char *password);
159 void krb5_cleanup_proc(void *authctxt);
162 #include "auth-pam.h"
163 #include "auth2-pam.h"
165 void do_authentication(void);
166 void do_authentication2(void);
168 Authctxt *authctxt_new(void);
169 void auth_log(Authctxt *, int, char *, char *);
170 void userauth_finish(Authctxt *, int, char *);
171 int auth_root_allowed(char *);
173 int auth2_challenge(Authctxt *, char *);
175 int allowed_user(struct passwd *);
177 char *get_challenge(Authctxt *);
178 int verify_response(Authctxt *, const char *);
180 struct passwd * auth_get_user(void);
182 /* expand a filename - return buffer is allocated by xmalloc */
183 char *expand_filename(const char *, struct passwd *);
184 char *authorized_keys_file(struct passwd *);
185 char *authorized_keys_file2(struct passwd *);
187 /* check a file and the path to it */
189 secure_filename(FILE *, const char *, struct passwd *, char *, size_t);
191 /* helper for hostbased auth */
193 check_key_in_hostfiles(struct passwd *, Key *, const char *,
194 const char *, const char *);
196 #define AUTH_FAIL_MAX 6
197 #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2)
198 #define AUTH_FAIL_MSG "Too many authentication failures for %.100s"