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41b2f314 | 1 | /* $OpenBSD: auth.h,v 1.41 2002/09/26 11:38:43 markus Exp $ */ |
e9a17296 | 2 | |
3c0ef626 | 3 | /* |
4 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
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. | |
14 | * | |
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. | |
25 | * | |
3c0ef626 | 26 | */ |
e9a17296 | 27 | |
3c0ef626 | 28 | #ifndef AUTH_H |
29 | #define AUTH_H | |
30 | ||
31 | #include "key.h" | |
32 | #include "hostfile.h" | |
33 | #include <openssl/rsa.h> | |
34 | ||
35 | #ifdef HAVE_LOGIN_CAP | |
36 | #include <login_cap.h> | |
37 | #endif | |
38 | #ifdef BSD_AUTH | |
39 | #include <bsd_auth.h> | |
40 | #endif | |
41 | #ifdef KRB5 | |
42 | #include <krb5.h> | |
43 | #endif | |
44 | ||
45 | typedef struct Authctxt Authctxt; | |
f5799ae1 | 46 | typedef struct Authmethod Authmethod; |
3c0ef626 | 47 | typedef struct KbdintDevice KbdintDevice; |
48 | ||
49 | struct Authctxt { | |
50 | int success; | |
51 | int postponed; | |
52 | int valid; | |
53 | int attempt; | |
54 | int failures; | |
55 | char *user; | |
56 | char *service; | |
57 | struct passwd *pw; | |
58 | char *style; | |
59 | void *kbdintctxt; | |
60 | #ifdef BSD_AUTH | |
61 | auth_session_t *as; | |
62 | #endif | |
63 | #ifdef KRB4 | |
64 | char *krb4_ticket_file; | |
65 | #endif | |
66 | #ifdef KRB5 | |
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; | |
72 | #endif | |
73 | }; | |
74 | ||
f5799ae1 | 75 | struct Authmethod { |
76 | char *name; | |
77 | int (*userauth)(Authctxt *authctxt); | |
78 | int *enabled; | |
79 | }; | |
80 | ||
3c0ef626 | 81 | /* |
82 | * Keyboard interactive device: | |
e9a17296 | 83 | * init_ctx returns: non NULL upon success |
84 | * query returns: 0 - success, otherwise failure | |
3c0ef626 | 85 | * respond returns: 0 - success, 1 - need further interaction, |
86 | * otherwise - failure | |
87 | */ | |
88 | struct KbdintDevice | |
89 | { | |
90 | const char *name; | |
e9a17296 | 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); | |
3c0ef626 | 96 | }; |
97 | ||
700318f3 | 98 | int auth_rhosts(struct passwd *, const char *); |
3c0ef626 | 99 | int |
100 | auth_rhosts2(struct passwd *, const char *, const char *, const char *); | |
101 | ||
700318f3 | 102 | int auth_rhosts_rsa(struct passwd *, char *, Key *); |
3c0ef626 | 103 | int auth_password(Authctxt *, const char *); |
104 | int auth_rsa(struct passwd *, BIGNUM *); | |
700318f3 | 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 **); | |
109 | ||
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 *); | |
3c0ef626 | 113 | |
114 | #ifdef KRB4 | |
115 | #include <krb.h> | |
41b2f314 | 116 | int auth_krb4(Authctxt *, KTEXT, char **, KTEXT); |
3c0ef626 | 117 | int auth_krb4_password(Authctxt *, const char *); |
118 | void krb4_cleanup_proc(void *); | |
119 | ||
120 | #ifdef AFS | |
121 | #include <kafs.h> | |
122 | int auth_krb4_tgt(Authctxt *, const char *); | |
123 | int auth_afs_token(Authctxt *, const char *); | |
124 | #endif /* AFS */ | |
125 | ||
126 | #endif /* KRB4 */ | |
127 | ||
128 | #ifdef KRB5 | |
41b2f314 | 129 | int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client, krb5_data *); |
3c0ef626 | 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); | |
133 | #endif /* KRB5 */ | |
134 | ||
135 | #include "auth-pam.h" | |
136 | #include "auth2-pam.h" | |
137 | ||
700318f3 | 138 | Authctxt *do_authentication(void); |
139 | Authctxt *do_authentication2(void); | |
3c0ef626 | 140 | |
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 *); | |
145 | ||
700318f3 | 146 | char *auth2_read_banner(void); |
147 | ||
148 | void privsep_challenge_enable(void); | |
149 | ||
3c0ef626 | 150 | int auth2_challenge(Authctxt *, char *); |
e9a17296 | 151 | void auth2_challenge_stop(Authctxt *); |
700318f3 | 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 **); | |
3c0ef626 | 156 | |
157 | int allowed_user(struct passwd *); | |
700318f3 | 158 | struct passwd * getpwnamallow(const char *user); |
3c0ef626 | 159 | |
160 | char *get_challenge(Authctxt *); | |
161 | int verify_response(Authctxt *, const char *); | |
162 | ||
163 | struct passwd * auth_get_user(void); | |
164 | ||
165 | char *expand_filename(const char *, struct passwd *); | |
166 | char *authorized_keys_file(struct passwd *); | |
167 | char *authorized_keys_file2(struct passwd *); | |
168 | ||
169 | int | |
170 | secure_filename(FILE *, const char *, struct passwd *, char *, size_t); | |
171 | ||
172 | HostStatus | |
173 | check_key_in_hostfiles(struct passwd *, Key *, const char *, | |
174 | const char *, const char *); | |
175 | ||
700318f3 | 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 *); | |
181 | ||
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); | |
186 | ||
3c0ef626 | 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" | |
190 | ||
700318f3 | 191 | #define SKEY_PROMPT "\nS/Key Password: " |
3c0ef626 | 192 | #endif |