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44a053a3 | 1 | /* $OpenBSD: auth.h,v 1.39 2002/05/31 11:35:15 markus Exp $ */ |
e9702f7d | 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 | */ |
e9702f7d | 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; | |
44a053a3 | 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 | |
5598e598 | 73 | void *methoddata; |
3c0ef626 | 74 | }; |
75 | ||
44a053a3 | 76 | struct Authmethod { |
77 | char *name; | |
78 | int (*userauth)(Authctxt *authctxt); | |
79 | int *enabled; | |
80 | }; | |
81 | ||
3c0ef626 | 82 | /* |
83 | * Keyboard interactive device: | |
e9702f7d | 84 | * init_ctx returns: non NULL upon success |
85 | * query returns: 0 - success, otherwise failure | |
3c0ef626 | 86 | * respond returns: 0 - success, 1 - need further interaction, |
87 | * otherwise - failure | |
88 | */ | |
89 | struct KbdintDevice | |
90 | { | |
91 | const char *name; | |
e9702f7d | 92 | void* (*init_ctx)(Authctxt*); |
93 | int (*query)(void *ctx, char **name, char **infotxt, | |
94 | u_int *numprompts, char ***prompts, u_int **echo_on); | |
95 | int (*respond)(void *ctx, u_int numresp, char **responses); | |
96 | void (*free_ctx)(void *ctx); | |
3c0ef626 | 97 | }; |
98 | ||
350391c5 | 99 | int auth_rhosts(struct passwd *, const char *); |
3c0ef626 | 100 | int |
101 | auth_rhosts2(struct passwd *, const char *, const char *, const char *); | |
102 | ||
350391c5 | 103 | int auth_rhosts_rsa(struct passwd *, char *, Key *); |
3c0ef626 | 104 | int auth_password(Authctxt *, const char *); |
105 | int auth_rsa(struct passwd *, BIGNUM *); | |
350391c5 | 106 | int auth_rsa_challenge_dialog(Key *); |
107 | BIGNUM *auth_rsa_generate_challenge(Key *); | |
108 | int auth_rsa_verify_response(Key *, BIGNUM *, u_char[]); | |
109 | int auth_rsa_key_allowed(struct passwd *, BIGNUM *, Key **); | |
110 | ||
111 | int auth_rhosts_rsa_key_allowed(struct passwd *, char *, char *, Key *); | |
112 | int hostbased_key_allowed(struct passwd *, const char *, char *, Key *); | |
113 | int user_key_allowed(struct passwd *, Key *); | |
3c0ef626 | 114 | |
115 | #ifdef KRB4 | |
116 | #include <krb.h> | |
117 | int auth_krb4(Authctxt *, KTEXT, char **); | |
118 | int auth_krb4_password(Authctxt *, const char *); | |
119 | void krb4_cleanup_proc(void *); | |
120 | ||
121 | #ifdef AFS | |
122 | #include <kafs.h> | |
123 | int auth_krb4_tgt(Authctxt *, const char *); | |
124 | int auth_afs_token(Authctxt *, const char *); | |
125 | #endif /* AFS */ | |
126 | ||
127 | #endif /* KRB4 */ | |
128 | ||
129 | #ifdef KRB5 | |
130 | int auth_krb5(Authctxt *authctxt, krb5_data *auth, char **client); | |
131 | int auth_krb5_tgt(Authctxt *authctxt, krb5_data *tgt); | |
132 | int auth_krb5_password(Authctxt *authctxt, const char *password); | |
133 | void krb5_cleanup_proc(void *authctxt); | |
134 | #endif /* KRB5 */ | |
135 | ||
136 | #include "auth-pam.h" | |
137 | #include "auth2-pam.h" | |
138 | ||
350391c5 | 139 | Authctxt *do_authentication(void); |
140 | Authctxt *do_authentication2(void); | |
3c0ef626 | 141 | |
142 | Authctxt *authctxt_new(void); | |
143 | void auth_log(Authctxt *, int, char *, char *); | |
144 | void userauth_finish(Authctxt *, int, char *); | |
145 | int auth_root_allowed(char *); | |
146 | ||
350391c5 | 147 | char *auth2_read_banner(void); |
148 | ||
149 | void privsep_challenge_enable(void); | |
150 | ||
3c0ef626 | 151 | int auth2_challenge(Authctxt *, char *); |
e9702f7d | 152 | void auth2_challenge_stop(Authctxt *); |
350391c5 | 153 | int bsdauth_query(void *, char **, char **, u_int *, char ***, u_int **); |
154 | int bsdauth_respond(void *, u_int, char **); | |
155 | int skey_query(void *, char **, char **, u_int *, char ***, u_int **); | |
156 | int skey_respond(void *, u_int, char **); | |
3c0ef626 | 157 | |
158 | int allowed_user(struct passwd *); | |
350391c5 | 159 | struct passwd * getpwnamallow(const char *user); |
3c0ef626 | 160 | |
161 | char *get_challenge(Authctxt *); | |
162 | int verify_response(Authctxt *, const char *); | |
163 | ||
164 | struct passwd * auth_get_user(void); | |
165 | ||
166 | char *expand_filename(const char *, struct passwd *); | |
167 | char *authorized_keys_file(struct passwd *); | |
168 | char *authorized_keys_file2(struct passwd *); | |
169 | ||
170 | int | |
171 | secure_filename(FILE *, const char *, struct passwd *, char *, size_t); | |
172 | ||
173 | HostStatus | |
174 | check_key_in_hostfiles(struct passwd *, Key *, const char *, | |
175 | const char *, const char *); | |
176 | ||
350391c5 | 177 | /* hostkey handling */ |
178 | Key *get_hostkey_by_index(int); | |
179 | Key *get_hostkey_by_type(int); | |
180 | int get_hostkey_index(Key *); | |
181 | int ssh1_session_key(BIGNUM *); | |
182 | ||
183 | /* debug messages during authentication */ | |
184 | void auth_debug_add(const char *fmt,...) __attribute__((format(printf, 1, 2))); | |
185 | void auth_debug_send(void); | |
186 | void auth_debug_reset(void); | |
187 | ||
3c0ef626 | 188 | #define AUTH_FAIL_MAX 6 |
189 | #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2) | |
190 | #define AUTH_FAIL_MSG "Too many authentication failures for %.100s" | |
191 | ||
350391c5 | 192 | #define SKEY_PROMPT "\nS/Key Password: " |
3c0ef626 | 193 | #endif |