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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 | * |
ced49be2 | 24 | * $OpenBSD: auth.h,v 1.21 2001/06/26 16:15:23 dugsong 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 | |
ced49be2 | 39 | #ifdef KRB5 |
40 | #include <krb5.h> | |
41 | #endif | |
af774732 | 42 | |
94ec8c6b | 43 | typedef struct Authctxt Authctxt; |
5ba55ada | 44 | typedef struct KbdintDevice KbdintDevice; |
45 | ||
94ec8c6b | 46 | struct Authctxt { |
ced49be2 | 47 | int success; |
48 | int postponed; | |
49 | int valid; | |
50 | int attempt; | |
51 | int failures; | |
52 | char *user; | |
53 | char *service; | |
54 | struct passwd *pw; | |
55 | char *style; | |
56 | void *kbdintctxt; | |
af774732 | 57 | #ifdef BSD_AUTH |
ced49be2 | 58 | auth_session_t *as; |
59 | #endif | |
60 | #ifdef KRB4 | |
61 | char *krb4_ticket_file; | |
62 | #endif | |
63 | #ifdef KRB5 | |
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; | |
af774732 | 69 | #endif |
94ec8c6b | 70 | }; |
71 | ||
5ba55ada | 72 | /* |
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, | |
77 | * otherwise - failure | |
78 | */ | |
79 | struct KbdintDevice | |
80 | { | |
81 | const char *name; | |
82 | void* (*init_ctx) __P((Authctxt*)); | |
83 | int (*query) __P((void *ctx, char **name, char **infotxt, | |
84 | u_int *numprompts, char ***prompts, | |
85 | u_int **echo_on)); | |
86 | int (*respond) __P((void *ctx, u_int numresp, char **responses)); | |
87 | void (*free_ctx) __P((void *ctx)); | |
88 | }; | |
89 | ||
42f11eb2 | 90 | /* |
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). | |
94 | */ | |
2a1e4639 | 95 | int auth_rhosts(struct passwd *, const char *); |
42f11eb2 | 96 | |
8002af61 | 97 | /* extended interface similar to auth_rhosts() */ |
98 | int | |
2a1e4639 | 99 | auth_rhosts2(struct passwd *, const char *, const char *, const char *); |
8002af61 | 100 | |
42f11eb2 | 101 | /* |
102 | * Tries to authenticate the user using the .rhosts file and the host using | |
103 | * its host key. Returns true if authentication succeeds. | |
104 | */ | |
105 | int | |
2a1e4639 | 106 | auth_rhosts_rsa(struct passwd *, const char *, RSA *); |
42f11eb2 | 107 | |
108 | /* | |
109 | * Tries to authenticate the user using password. Returns true if | |
110 | * authentication succeeds. | |
111 | */ | |
2a1e4639 | 112 | int auth_password(Authctxt *, const char *); |
42f11eb2 | 113 | |
114 | /* | |
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. | |
118 | */ | |
2a1e4639 | 119 | int auth_rsa(struct passwd *, BIGNUM *); |
42f11eb2 | 120 | |
121 | /* | |
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. | |
124 | */ | |
2a1e4639 | 125 | int auth_rsa_read_key(char **, u_int *, BIGNUM *, BIGNUM *); |
42f11eb2 | 126 | |
127 | /* | |
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. | |
131 | */ | |
2a1e4639 | 132 | int auth_rsa_challenge_dialog(RSA *); |
42f11eb2 | 133 | |
134 | #ifdef KRB4 | |
135 | #include <krb.h> | |
136 | /* | |
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. | |
140 | */ | |
ced49be2 | 141 | int auth_krb4(Authctxt *, KTEXT, char **); |
142 | int auth_krb4_password(Authctxt *, const char *); | |
2a1e4639 | 143 | void krb4_cleanup_proc(void *); |
42f11eb2 | 144 | |
145 | #ifdef AFS | |
146 | #include <kafs.h> | |
147 | ||
148 | /* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */ | |
ced49be2 | 149 | int auth_krb4_tgt(Authctxt *, const char *); |
150 | int auth_afs_token(Authctxt *, const char *); | |
42f11eb2 | 151 | #endif /* AFS */ |
152 | ||
153 | #endif /* KRB4 */ | |
154 | ||
ced49be2 | 155 | #ifdef KRB5 |
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); | |
160 | #endif /* KRB5 */ | |
161 | ||
8c9fe09e | 162 | #include "auth-pam.h" |
163 | #include "auth2-pam.h" | |
164 | ||
7368a6c8 | 165 | void do_authentication(void); |
e78a59f5 | 166 | void do_authentication2(void); |
167 | ||
59c97189 | 168 | Authctxt *authctxt_new(void); |
2a1e4639 | 169 | void auth_log(Authctxt *, int, char *, char *); |
170 | void userauth_finish(Authctxt *, int, char *); | |
171 | int auth_root_allowed(char *); | |
94ec8c6b | 172 | |
2a1e4639 | 173 | int auth2_challenge(Authctxt *, char *); |
7368a6c8 | 174 | |
2a1e4639 | 175 | int allowed_user(struct passwd *); |
59c97189 | 176 | |
2a1e4639 | 177 | char *get_challenge(Authctxt *); |
178 | int verify_response(Authctxt *, const char *); | |
59c97189 | 179 | |
94ec8c6b | 180 | struct passwd * auth_get_user(void); |
a306f2dd | 181 | |
c8445989 | 182 | /* expand a filename - return buffer is allocated by xmalloc */ |
2a1e4639 | 183 | char *expand_filename(const char *, struct passwd *); |
184 | char *authorized_keys_file(struct passwd *); | |
185 | char *authorized_keys_file2(struct passwd *); | |
c8445989 | 186 | |
187 | /* check a file and the path to it */ | |
188 | int | |
2a1e4639 | 189 | secure_filename(FILE *, const char *, struct passwd *, char *, size_t); |
c8445989 | 190 | |
d0c8ca5c | 191 | /* helper for hostbased auth */ |
192 | HostStatus | |
2a1e4639 | 193 | check_key_in_hostfiles(struct passwd *, Key *, const char *, |
194 | const char *, const char *); | |
d0c8ca5c | 195 | |
a306f2dd | 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" | |
199 | ||
7368a6c8 | 200 | #endif |