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bcbf86ec | 1 | /* |
2 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
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. | |
12 | * | |
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. | |
8abcdba4 | 23 | * |
2a1e4639 | 24 | * $OpenBSD: auth.h,v 1.20 2001/06/26 06:32:47 itojun Exp $ |
bcbf86ec | 25 | */ |
7368a6c8 | 26 | #ifndef AUTH_H |
27 | #define AUTH_H | |
28 | ||
d0c8ca5c | 29 | #include "key.h" |
30 | #include "hostfile.h" | |
42f11eb2 | 31 | #include <openssl/rsa.h> |
32 | ||
af774732 | 33 | #ifdef HAVE_LOGIN_CAP |
34 | #include <login_cap.h> | |
35 | #endif | |
36 | #ifdef BSD_AUTH | |
37 | #include <bsd_auth.h> | |
38 | #endif | |
39 | ||
94ec8c6b | 40 | typedef struct Authctxt Authctxt; |
5ba55ada | 41 | typedef struct KbdintDevice KbdintDevice; |
42 | ||
94ec8c6b | 43 | struct Authctxt { |
44 | int success; | |
59c97189 | 45 | int postponed; |
94ec8c6b | 46 | int valid; |
47 | int attempt; | |
8abcdba4 | 48 | int failures; |
94ec8c6b | 49 | char *user; |
50 | char *service; | |
51 | struct passwd *pw; | |
59c97189 | 52 | char *style; |
5ba55ada | 53 | void *kbdintctxt; |
af774732 | 54 | #ifdef BSD_AUTH |
55 | auth_session_t *as; | |
56 | #endif | |
94ec8c6b | 57 | }; |
58 | ||
5ba55ada | 59 | /* |
60 | * Keyboard interactive device: | |
61 | * init_ctx returns: non NULL upon success | |
62 | * query returns: 0 - success, otherwise failure | |
63 | * respond returns: 0 - success, 1 - need further interaction, | |
64 | * otherwise - failure | |
65 | */ | |
66 | struct KbdintDevice | |
67 | { | |
68 | const char *name; | |
69 | void* (*init_ctx) __P((Authctxt*)); | |
70 | int (*query) __P((void *ctx, char **name, char **infotxt, | |
71 | u_int *numprompts, char ***prompts, | |
72 | u_int **echo_on)); | |
73 | int (*respond) __P((void *ctx, u_int numresp, char **responses)); | |
74 | void (*free_ctx) __P((void *ctx)); | |
75 | }; | |
76 | ||
42f11eb2 | 77 | /* |
78 | * Tries to authenticate the user using the .rhosts file. Returns true if | |
79 | * authentication succeeds. If ignore_rhosts is non-zero, this will not | |
80 | * consider .rhosts and .shosts (/etc/hosts.equiv will still be used). | |
81 | */ | |
2a1e4639 | 82 | int auth_rhosts(struct passwd *, const char *); |
42f11eb2 | 83 | |
8002af61 | 84 | /* extended interface similar to auth_rhosts() */ |
85 | int | |
2a1e4639 | 86 | auth_rhosts2(struct passwd *, const char *, const char *, const char *); |
8002af61 | 87 | |
42f11eb2 | 88 | /* |
89 | * Tries to authenticate the user using the .rhosts file and the host using | |
90 | * its host key. Returns true if authentication succeeds. | |
91 | */ | |
92 | int | |
2a1e4639 | 93 | auth_rhosts_rsa(struct passwd *, const char *, RSA *); |
42f11eb2 | 94 | |
95 | /* | |
96 | * Tries to authenticate the user using password. Returns true if | |
97 | * authentication succeeds. | |
98 | */ | |
2a1e4639 | 99 | int auth_password(Authctxt *, const char *); |
42f11eb2 | 100 | |
101 | /* | |
102 | * Performs the RSA authentication dialog with the client. This returns 0 if | |
103 | * the client could not be authenticated, and 1 if authentication was | |
104 | * successful. This may exit if there is a serious protocol violation. | |
105 | */ | |
2a1e4639 | 106 | int auth_rsa(struct passwd *, BIGNUM *); |
42f11eb2 | 107 | |
108 | /* | |
109 | * Parses an RSA key (number of bits, e, n) from a string. Moves the pointer | |
110 | * over the key. Skips any whitespace at the beginning and at end. | |
111 | */ | |
2a1e4639 | 112 | int auth_rsa_read_key(char **, u_int *, BIGNUM *, BIGNUM *); |
42f11eb2 | 113 | |
114 | /* | |
115 | * Performs the RSA authentication challenge-response dialog with the client, | |
116 | * and returns true (non-zero) if the client gave the correct answer to our | |
117 | * challenge; returns zero if the client gives a wrong answer. | |
118 | */ | |
2a1e4639 | 119 | int auth_rsa_challenge_dialog(RSA *); |
42f11eb2 | 120 | |
121 | #ifdef KRB4 | |
122 | #include <krb.h> | |
123 | /* | |
124 | * Performs Kerberos v4 mutual authentication with the client. This returns 0 | |
125 | * if the client could not be authenticated, and 1 if authentication was | |
126 | * successful. This may exit if there is a serious protocol violation. | |
127 | */ | |
2a1e4639 | 128 | int auth_krb4(const char *, KTEXT, char **); |
129 | int krb4_init(uid_t); | |
130 | void krb4_cleanup_proc(void *); | |
131 | int auth_krb4_password(struct passwd *, const char *); | |
42f11eb2 | 132 | |
133 | #ifdef AFS | |
134 | #include <kafs.h> | |
135 | ||
136 | /* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */ | |
2a1e4639 | 137 | int auth_kerberos_tgt(struct passwd *, const char *); |
138 | int auth_afs_token(struct passwd *, const char *); | |
42f11eb2 | 139 | #endif /* AFS */ |
140 | ||
141 | #endif /* KRB4 */ | |
142 | ||
8c9fe09e | 143 | #include "auth-pam.h" |
144 | #include "auth2-pam.h" | |
145 | ||
7368a6c8 | 146 | void do_authentication(void); |
e78a59f5 | 147 | void do_authentication2(void); |
148 | ||
59c97189 | 149 | Authctxt *authctxt_new(void); |
2a1e4639 | 150 | void auth_log(Authctxt *, int, char *, char *); |
151 | void userauth_finish(Authctxt *, int, char *); | |
152 | int auth_root_allowed(char *); | |
94ec8c6b | 153 | |
2a1e4639 | 154 | int auth2_challenge(Authctxt *, char *); |
7368a6c8 | 155 | |
2a1e4639 | 156 | int allowed_user(struct passwd *); |
59c97189 | 157 | |
2a1e4639 | 158 | char *get_challenge(Authctxt *); |
159 | int verify_response(Authctxt *, const char *); | |
59c97189 | 160 | |
94ec8c6b | 161 | struct passwd * auth_get_user(void); |
a306f2dd | 162 | |
c8445989 | 163 | /* expand a filename - return buffer is allocated by xmalloc */ |
2a1e4639 | 164 | char *expand_filename(const char *, struct passwd *); |
165 | char *authorized_keys_file(struct passwd *); | |
166 | char *authorized_keys_file2(struct passwd *); | |
c8445989 | 167 | |
168 | /* check a file and the path to it */ | |
169 | int | |
2a1e4639 | 170 | secure_filename(FILE *, const char *, struct passwd *, char *, size_t); |
c8445989 | 171 | |
d0c8ca5c | 172 | /* helper for hostbased auth */ |
173 | HostStatus | |
2a1e4639 | 174 | check_key_in_hostfiles(struct passwd *, Key *, const char *, |
175 | const char *, const char *); | |
d0c8ca5c | 176 | |
a306f2dd | 177 | #define AUTH_FAIL_MAX 6 |
178 | #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2) | |
179 | #define AUTH_FAIL_MSG "Too many authentication failures for %.100s" | |
180 | ||
7368a6c8 | 181 | #endif |