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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. | |
23 | * | |
24 | * $OpenBSD: auth.h,v 1.12 2001/02/22 21:59:43 markus Exp $ | |
25 | */ | |
26 | #ifndef AUTH_H | |
27 | #define AUTH_H | |
28 | ||
29 | #include <openssl/rsa.h> | |
30 | ||
31 | #ifdef HAVE_LOGIN_CAP | |
32 | #include <login_cap.h> | |
33 | #endif | |
34 | #ifdef BSD_AUTH | |
35 | #include <bsd_auth.h> | |
36 | #endif | |
37 | ||
38 | typedef struct Authctxt Authctxt; | |
39 | struct Authctxt { | |
40 | int success; | |
41 | int postponed; | |
42 | int valid; | |
43 | int attempt; | |
44 | int failures; | |
45 | char *user; | |
46 | char *service; | |
47 | struct passwd *pw; | |
48 | char *style; | |
49 | #ifdef BSD_AUTH | |
50 | auth_session_t *as; | |
51 | #endif | |
52 | }; | |
53 | ||
54 | /* | |
55 | * Tries to authenticate the user using the .rhosts file. Returns true if | |
56 | * authentication succeeds. If ignore_rhosts is non-zero, this will not | |
57 | * consider .rhosts and .shosts (/etc/hosts.equiv will still be used). | |
58 | */ | |
59 | int auth_rhosts(struct passwd * pw, const char *client_user); | |
60 | ||
61 | /* | |
62 | * Tries to authenticate the user using the .rhosts file and the host using | |
63 | * its host key. Returns true if authentication succeeds. | |
64 | */ | |
65 | int | |
66 | auth_rhosts_rsa(struct passwd * pw, const char *client_user, RSA* client_host_key); | |
67 | ||
68 | /* | |
69 | * Tries to authenticate the user using password. Returns true if | |
70 | * authentication succeeds. | |
71 | */ | |
72 | int auth_password(Authctxt *authctxt, const char *password); | |
73 | ||
74 | /* | |
75 | * Performs the RSA authentication dialog with the client. This returns 0 if | |
76 | * the client could not be authenticated, and 1 if authentication was | |
77 | * successful. This may exit if there is a serious protocol violation. | |
78 | */ | |
79 | int auth_rsa(struct passwd * pw, BIGNUM * client_n); | |
80 | ||
81 | /* | |
82 | * Parses an RSA key (number of bits, e, n) from a string. Moves the pointer | |
83 | * over the key. Skips any whitespace at the beginning and at end. | |
84 | */ | |
85 | int auth_rsa_read_key(char **cpp, u_int *bitsp, BIGNUM * e, BIGNUM * n); | |
86 | ||
87 | /* | |
88 | * Performs the RSA authentication challenge-response dialog with the client, | |
89 | * and returns true (non-zero) if the client gave the correct answer to our | |
90 | * challenge; returns zero if the client gives a wrong answer. | |
91 | */ | |
92 | int auth_rsa_challenge_dialog(RSA *pk); | |
93 | ||
94 | #ifdef KRB4 | |
95 | #include <krb.h> | |
96 | /* | |
97 | * Performs Kerberos v4 mutual authentication with the client. This returns 0 | |
98 | * if the client could not be authenticated, and 1 if authentication was | |
99 | * successful. This may exit if there is a serious protocol violation. | |
100 | */ | |
101 | int auth_krb4(const char *server_user, KTEXT auth, char **client); | |
102 | int krb4_init(uid_t uid); | |
103 | void krb4_cleanup_proc(void *ignore); | |
104 | int auth_krb4_password(struct passwd * pw, const char *password); | |
105 | ||
106 | #ifdef AFS | |
107 | #include <kafs.h> | |
108 | ||
109 | /* Accept passed Kerberos v4 ticket-granting ticket and AFS tokens. */ | |
110 | int auth_kerberos_tgt(struct passwd * pw, const char *string); | |
111 | int auth_afs_token(struct passwd * pw, const char *token_string); | |
112 | #endif /* AFS */ | |
113 | ||
114 | #endif /* KRB4 */ | |
115 | ||
116 | #include "auth-pam.h" | |
117 | #include "auth2-pam.h" | |
118 | ||
119 | void do_authentication(void); | |
120 | void do_authentication2(void); | |
121 | ||
122 | Authctxt *authctxt_new(void); | |
123 | void auth_log(Authctxt *authctxt, int authenticated, char *method, char *info); | |
124 | void userauth_reply(Authctxt *authctxt, int authenticated); | |
125 | int auth_root_allowed(char *method); | |
126 | ||
127 | int auth2_challenge(Authctxt *authctxt, char *devs); | |
128 | ||
129 | int allowed_user(struct passwd * pw); | |
130 | ||
131 | char *get_challenge(Authctxt *authctxt, char *devs); | |
132 | int verify_response(Authctxt *authctxt, char *response); | |
133 | ||
134 | struct passwd * auth_get_user(void); | |
135 | ||
136 | #define AUTH_FAIL_MAX 6 | |
137 | #define AUTH_FAIL_LOG (AUTH_FAIL_MAX/2) | |
138 | #define AUTH_FAIL_MSG "Too many authentication failures for %.100s" | |
139 | ||
140 | #endif |