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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 | * |
6978866a | 24 | * $OpenBSD: auth.h,v 1.19 2001/06/25 17:54:49 provos 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 | */ | |
82 | int auth_rhosts(struct passwd * pw, const char *client_user); | |
83 | ||
8002af61 | 84 | /* extended interface similar to auth_rhosts() */ |
85 | int | |
86 | auth_rhosts2(struct passwd *pw, const char *client_user, const char *hostname, | |
87 | const char *ipaddr); | |
88 | ||
42f11eb2 | 89 | /* |
90 | * Tries to authenticate the user using the .rhosts file and the host using | |
91 | * its host key. Returns true if authentication succeeds. | |
92 | */ | |
93 | int | |
94 | auth_rhosts_rsa(struct passwd * pw, const char *client_user, RSA* client_host_key); | |
95 | ||
96 | /* | |
97 | * Tries to authenticate the user using password. Returns true if | |
98 | * authentication succeeds. | |
99 | */ | |
af774732 | 100 | int auth_password(Authctxt *authctxt, const char *password); |
42f11eb2 | 101 | |
102 | /* | |
103 | * Performs the RSA authentication dialog with the client. This returns 0 if | |
104 | * the client could not be authenticated, and 1 if authentication was | |
105 | * successful. This may exit if there is a serious protocol violation. | |
106 | */ | |
107 | int auth_rsa(struct passwd * pw, BIGNUM * client_n); | |
108 | ||
109 | /* | |
110 | * Parses an RSA key (number of bits, e, n) from a string. Moves the pointer | |
111 | * over the key. Skips any whitespace at the beginning and at end. | |
112 | */ | |
113 | int auth_rsa_read_key(char **cpp, u_int *bitsp, BIGNUM * e, BIGNUM * n); | |
114 | ||
115 | /* | |
116 | * Performs the RSA authentication challenge-response dialog with the client, | |
117 | * and returns true (non-zero) if the client gave the correct answer to our | |
118 | * challenge; returns zero if the client gives a wrong answer. | |
119 | */ | |
120 | int auth_rsa_challenge_dialog(RSA *pk); | |
121 | ||
122 | #ifdef KRB4 | |
123 | #include <krb.h> | |
124 | /* | |
125 | * Performs Kerberos v4 mutual authentication with the client. This returns 0 | |
126 | * if the client could not be authenticated, and 1 if authentication was | |
127 | * successful. This may exit if there is a serious protocol violation. | |
128 | */ | |
129 | int auth_krb4(const char *server_user, KTEXT auth, char **client); | |
130 | int krb4_init(uid_t uid); | |
131 | void krb4_cleanup_proc(void *ignore); | |
132 | int auth_krb4_password(struct passwd * pw, const char *password); | |
133 | ||
134 | #ifdef AFS | |
135 | #include <kafs.h> | |
136 | ||
137 | /* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */ | |
138 | int auth_kerberos_tgt(struct passwd * pw, const char *string); | |
139 | int auth_afs_token(struct passwd * pw, const char *token_string); | |
140 | #endif /* AFS */ | |
141 | ||
142 | #endif /* KRB4 */ | |
143 | ||
8c9fe09e | 144 | #include "auth-pam.h" |
145 | #include "auth2-pam.h" | |
146 | ||
7368a6c8 | 147 | void do_authentication(void); |
e78a59f5 | 148 | void do_authentication2(void); |
149 | ||
59c97189 | 150 | Authctxt *authctxt_new(void); |
151 | void auth_log(Authctxt *authctxt, int authenticated, char *method, char *info); | |
d9cd3575 | 152 | void userauth_finish(Authctxt *authctxt, int authenticated, char *method); |
15853e93 | 153 | int auth_root_allowed(char *method); |
94ec8c6b | 154 | |
59c97189 | 155 | int auth2_challenge(Authctxt *authctxt, char *devs); |
7368a6c8 | 156 | |
94ec8c6b | 157 | int allowed_user(struct passwd * pw); |
59c97189 | 158 | |
5ba55ada | 159 | char *get_challenge(Authctxt *authctxt); |
160 | int verify_response(Authctxt *authctxt, const char *response); | |
59c97189 | 161 | |
94ec8c6b | 162 | struct passwd * auth_get_user(void); |
a306f2dd | 163 | |
c8445989 | 164 | /* expand a filename - return buffer is allocated by xmalloc */ |
165 | char *expand_filename(const char *template, struct passwd *pw); | |
166 | char *authorized_keys_file(struct passwd *pw); | |
167 | char *authorized_keys_file2(struct passwd *pw); | |
168 | ||
169 | /* check a file and the path to it */ | |
170 | int | |
6978866a | 171 | secure_filename(FILE *f, const char *file, struct passwd *pw, |
172 | char *err, size_t errlen); | |
c8445989 | 173 | |
d0c8ca5c | 174 | /* helper for hostbased auth */ |
175 | HostStatus | |
176 | check_key_in_hostfiles(struct passwd *pw, Key *key, const char *host, | |
177 | const char *sysfile, const char *userfile); | |
178 | ||
a306f2dd | 179 | #define AUTH_FAIL_MAX 6 |
180 | #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2) | |
181 | #define AUTH_FAIL_MSG "Too many authentication failures for %.100s" | |
182 | ||
7368a6c8 | 183 | #endif |