Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 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. |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 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 | */ |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 24 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 25 | #include "includes.h" |
Ben Lindstrom | 511bb24 | 2002-06-06 20:52:37 +0000 | [diff] [blame^] | 26 | RCSID("$OpenBSD: auth2.c,v 1.93 2002/05/31 11:35:15 markus Exp $"); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 27 | |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 28 | #include "ssh2.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 29 | #include "xmalloc.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 30 | #include "packet.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 31 | #include "log.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 32 | #include "servconf.h" |
| 33 | #include "compat.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 34 | #include "auth.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 35 | #include "dispatch.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 36 | #include "pathnames.h" |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 37 | #include "monitor_wrap.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 38 | |
| 39 | /* import */ |
| 40 | extern ServerOptions options; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 41 | extern u_char *session_id2; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 42 | extern int session_id2_len; |
| 43 | |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 44 | Authctxt *x_authctxt = NULL; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 45 | |
Ben Lindstrom | 511bb24 | 2002-06-06 20:52:37 +0000 | [diff] [blame^] | 46 | /* methods */ |
| 47 | |
| 48 | extern Authmethod method_none; |
| 49 | extern Authmethod method_pubkey; |
| 50 | extern Authmethod method_passwd; |
| 51 | extern Authmethod method_kbdint; |
| 52 | extern Authmethod method_hostbased; |
| 53 | |
| 54 | Authmethod *authmethods[] = { |
| 55 | &method_none, |
| 56 | &method_pubkey, |
| 57 | &method_passwd, |
| 58 | &method_kbdint, |
| 59 | &method_hostbased, |
| 60 | NULL |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 61 | }; |
| 62 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 63 | /* protocol */ |
| 64 | |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 65 | static void input_service_request(int, u_int32_t, void *); |
| 66 | static void input_userauth_request(int, u_int32_t, void *); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 67 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 68 | /* helper */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 69 | static Authmethod *authmethod_lookup(const char *); |
Ben Lindstrom | 7907382 | 2001-07-04 03:42:30 +0000 | [diff] [blame] | 70 | static char *authmethods_get(void); |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 71 | int user_key_allowed(struct passwd *, Key *); |
| 72 | int hostbased_key_allowed(struct passwd *, const char *, char *, Key *); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 73 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 74 | /* |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 75 | * loop until authctxt->success == TRUE |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 76 | */ |
| 77 | |
Ben Lindstrom | 73ab9ba | 2002-03-22 01:27:35 +0000 | [diff] [blame] | 78 | Authctxt * |
Ben Lindstrom | 3c36bb2 | 2001-12-06 17:55:26 +0000 | [diff] [blame] | 79 | do_authentication2(void) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 80 | { |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 81 | Authctxt *authctxt = authctxt_new(); |
| 82 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 83 | x_authctxt = authctxt; /*XXX*/ |
| 84 | |
Ben Lindstrom | bdfb4df | 2001-10-03 17:12:43 +0000 | [diff] [blame] | 85 | /* challenge-response is implemented via keyboard interactive */ |
Ben Lindstrom | 551ea37 | 2001-06-05 18:56:16 +0000 | [diff] [blame] | 86 | if (options.challenge_response_authentication) |
Ben Lindstrom | 95fb2dd | 2001-01-23 03:12:10 +0000 | [diff] [blame] | 87 | options.kbd_interactive_authentication = 1; |
Damien Miller | f815442 | 2001-04-25 22:44:14 +1000 | [diff] [blame] | 88 | if (options.pam_authentication_via_kbd_int) |
| 89 | options.kbd_interactive_authentication = 1; |
Damien Miller | ffc868f | 2002-05-09 15:59:13 +1000 | [diff] [blame] | 90 | if (use_privsep) |
| 91 | options.pam_authentication_via_kbd_int = 0; |
Ben Lindstrom | 95fb2dd | 2001-01-23 03:12:10 +0000 | [diff] [blame] | 92 | |
Damien Miller | 7d05339 | 2002-01-22 23:24:13 +1100 | [diff] [blame] | 93 | dispatch_init(&dispatch_protocol_error); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 94 | dispatch_set(SSH2_MSG_SERVICE_REQUEST, &input_service_request); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 95 | dispatch_run(DISPATCH_BLOCK, &authctxt->success, authctxt); |
Ben Lindstrom | 73ab9ba | 2002-03-22 01:27:35 +0000 | [diff] [blame] | 96 | |
| 97 | return (authctxt); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 98 | } |
| 99 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 100 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 101 | input_service_request(int type, u_int32_t seq, void *ctxt) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 102 | { |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 103 | Authctxt *authctxt = ctxt; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 104 | u_int len; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 105 | int accept = 0; |
| 106 | char *service = packet_get_string(&len); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 107 | packet_check_eom(); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 108 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 109 | if (authctxt == NULL) |
| 110 | fatal("input_service_request: no authctxt"); |
| 111 | |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 112 | if (strcmp(service, "ssh-userauth") == 0) { |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 113 | if (!authctxt->success) { |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 114 | accept = 1; |
| 115 | /* now we can handle user-auth requests */ |
| 116 | dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &input_userauth_request); |
| 117 | } |
| 118 | } |
| 119 | /* XXX all other service requests are denied */ |
| 120 | |
| 121 | if (accept) { |
| 122 | packet_start(SSH2_MSG_SERVICE_ACCEPT); |
| 123 | packet_put_cstring(service); |
| 124 | packet_send(); |
| 125 | packet_write_wait(); |
| 126 | } else { |
| 127 | debug("bad service request %s", service); |
| 128 | packet_disconnect("bad service request %s", service); |
| 129 | } |
| 130 | xfree(service); |
| 131 | } |
| 132 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 133 | static void |
Damien Miller | 630d6f4 | 2002-01-22 23:17:30 +1100 | [diff] [blame] | 134 | input_userauth_request(int type, u_int32_t seq, void *ctxt) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 135 | { |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 136 | Authctxt *authctxt = ctxt; |
| 137 | Authmethod *m = NULL; |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 138 | char *user, *service, *method, *style = NULL; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 139 | int authenticated = 0; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 140 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 141 | if (authctxt == NULL) |
| 142 | fatal("input_userauth_request: no authctxt"); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 143 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 144 | user = packet_get_string(NULL); |
| 145 | service = packet_get_string(NULL); |
| 146 | method = packet_get_string(NULL); |
| 147 | debug("userauth-request for user %s service %s method %s", user, service, method); |
Ben Lindstrom | 4dccfa5 | 2000-12-28 16:40:05 +0000 | [diff] [blame] | 148 | debug("attempt %d failures %d", authctxt->attempt, authctxt->failures); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 149 | |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 150 | if ((style = strchr(user, ':')) != NULL) |
| 151 | *style++ = 0; |
| 152 | |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 153 | if (authctxt->attempt++ == 0) { |
Damien Miller | 3a5b023 | 2002-03-13 13:19:42 +1100 | [diff] [blame] | 154 | /* setup auth context */ |
Kevin Steves | 205cc1e | 2002-03-22 20:43:05 +0000 | [diff] [blame] | 155 | authctxt->pw = PRIVSEP(getpwnamallow(user)); |
| 156 | if (authctxt->pw && strcmp(service, "ssh-connection")==0) { |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 157 | authctxt->valid = 1; |
| 158 | debug2("input_userauth_request: setting up authctxt for %s", user); |
| 159 | #ifdef USE_PAM |
Damien Miller | 7941855 | 2002-04-23 20:28:48 +1000 | [diff] [blame] | 160 | PRIVSEP(start_pam(authctxt->pw->pw_name)); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 161 | #endif |
| 162 | } else { |
| 163 | log("input_userauth_request: illegal user %s", user); |
Damien Miller | 22e22bf | 2001-01-19 15:46:38 +1100 | [diff] [blame] | 164 | #ifdef USE_PAM |
Damien Miller | 7941855 | 2002-04-23 20:28:48 +1000 | [diff] [blame] | 165 | PRIVSEP(start_pam("NOUSER")); |
Damien Miller | 22e22bf | 2001-01-19 15:46:38 +1100 | [diff] [blame] | 166 | #endif |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 167 | } |
Ben Lindstrom | 7ebb635 | 2002-03-22 03:04:08 +0000 | [diff] [blame] | 168 | setproctitle("%s%s", authctxt->pw ? user : "unknown", |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 169 | use_privsep ? " [net]" : ""); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 170 | authctxt->user = xstrdup(user); |
| 171 | authctxt->service = xstrdup(service); |
Ben Lindstrom | 9d0c066 | 2001-06-09 01:40:00 +0000 | [diff] [blame] | 172 | authctxt->style = style ? xstrdup(style) : NULL; |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 173 | if (use_privsep) |
| 174 | mm_inform_authserv(service, style); |
Ben Lindstrom | 9d0c066 | 2001-06-09 01:40:00 +0000 | [diff] [blame] | 175 | } else if (strcmp(user, authctxt->user) != 0 || |
| 176 | strcmp(service, authctxt->service) != 0) { |
| 177 | packet_disconnect("Change of username or service not allowed: " |
| 178 | "(%s,%s) -> (%s,%s)", |
| 179 | authctxt->user, authctxt->service, user, service); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 180 | } |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 181 | /* reset state */ |
Damien Miller | ee11625 | 2001-12-21 12:42:34 +1100 | [diff] [blame] | 182 | auth2_challenge_stop(authctxt); |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 183 | authctxt->postponed = 0; |
Damien Miller | b70b61f | 2000-09-16 16:25:12 +1100 | [diff] [blame] | 184 | |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 185 | /* try to authenticate user */ |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 186 | m = authmethod_lookup(method); |
| 187 | if (m != NULL) { |
| 188 | debug2("input_userauth_request: try method %s", method); |
| 189 | authenticated = m->userauth(authctxt); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 190 | } |
Damien Miller | 5d57e50 | 2001-03-30 10:48:31 +1000 | [diff] [blame] | 191 | userauth_finish(authctxt, authenticated, method); |
| 192 | |
| 193 | xfree(service); |
| 194 | xfree(user); |
| 195 | xfree(method); |
| 196 | } |
| 197 | |
| 198 | void |
| 199 | userauth_finish(Authctxt *authctxt, int authenticated, char *method) |
| 200 | { |
Ben Lindstrom | cd4349f | 2001-06-09 00:23:17 +0000 | [diff] [blame] | 201 | char *methods; |
| 202 | |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 203 | if (!authctxt->valid && authenticated) |
| 204 | fatal("INTERNAL ERROR: authenticated invalid user %s", |
| 205 | authctxt->user); |
Damien Miller | b70b61f | 2000-09-16 16:25:12 +1100 | [diff] [blame] | 206 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 207 | /* Special handling for root */ |
Ben Lindstrom | d8a9021 | 2001-02-15 03:08:27 +0000 | [diff] [blame] | 208 | if (authenticated && authctxt->pw->pw_uid == 0 && |
| 209 | !auth_root_allowed(method)) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 210 | authenticated = 0; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 211 | |
| 212 | #ifdef USE_PAM |
Damien Miller | 7941855 | 2002-04-23 20:28:48 +1000 | [diff] [blame] | 213 | if (!use_privsep && authenticated && authctxt->user && |
| 214 | !do_pam_account(authctxt->user, NULL)) |
Damien Miller | b70b61f | 2000-09-16 16:25:12 +1100 | [diff] [blame] | 215 | authenticated = 0; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 216 | #endif /* USE_PAM */ |
| 217 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 218 | /* Log before sending the reply */ |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 219 | auth_log(authctxt, authenticated, method, " ssh2"); |
| 220 | |
Ben Lindstrom | cd4349f | 2001-06-09 00:23:17 +0000 | [diff] [blame] | 221 | if (authctxt->postponed) |
| 222 | return; |
| 223 | |
| 224 | /* XXX todo: check if multiple auth methods are needed */ |
| 225 | if (authenticated == 1) { |
| 226 | /* turn off userauth */ |
Damien Miller | 7d05339 | 2002-01-22 23:24:13 +1100 | [diff] [blame] | 227 | dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &dispatch_protocol_ignore); |
Ben Lindstrom | cd4349f | 2001-06-09 00:23:17 +0000 | [diff] [blame] | 228 | packet_start(SSH2_MSG_USERAUTH_SUCCESS); |
| 229 | packet_send(); |
| 230 | packet_write_wait(); |
| 231 | /* now we can break out */ |
| 232 | authctxt->success = 1; |
| 233 | } else { |
Damien Miller | e49d096 | 2001-11-13 23:46:18 +1100 | [diff] [blame] | 234 | if (authctxt->failures++ > AUTH_FAIL_MAX) { |
| 235 | #ifdef WITH_AIXAUTHENTICATE |
| 236 | loginfailed(authctxt->user, |
Damien Miller | f3451a2 | 2002-02-05 12:40:46 +1100 | [diff] [blame] | 237 | get_canonical_hostname(options.verify_reverse_mapping), |
Damien Miller | e49d096 | 2001-11-13 23:46:18 +1100 | [diff] [blame] | 238 | "ssh"); |
| 239 | #endif /* WITH_AIXAUTHENTICATE */ |
Ben Lindstrom | cd4349f | 2001-06-09 00:23:17 +0000 | [diff] [blame] | 240 | packet_disconnect(AUTH_FAIL_MSG, authctxt->user); |
Damien Miller | e49d096 | 2001-11-13 23:46:18 +1100 | [diff] [blame] | 241 | } |
Ben Lindstrom | cd4349f | 2001-06-09 00:23:17 +0000 | [diff] [blame] | 242 | methods = authmethods_get(); |
| 243 | packet_start(SSH2_MSG_USERAUTH_FAILURE); |
| 244 | packet_put_cstring(methods); |
| 245 | packet_put_char(0); /* XXX partial success, unused */ |
| 246 | packet_send(); |
| 247 | packet_write_wait(); |
| 248 | xfree(methods); |
| 249 | } |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 250 | } |
| 251 | |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 252 | char * |
| 253 | auth2_read_banner(void) |
Ben Lindstrom | 48bd7c1 | 2001-01-09 00:35:42 +0000 | [diff] [blame] | 254 | { |
| 255 | struct stat st; |
| 256 | char *banner = NULL; |
| 257 | off_t len, n; |
| 258 | int fd; |
| 259 | |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 260 | if ((fd = open(options.banner, O_RDONLY)) == -1) |
| 261 | return (NULL); |
| 262 | if (fstat(fd, &st) == -1) { |
| 263 | close(fd); |
| 264 | return (NULL); |
| 265 | } |
Ben Lindstrom | 48bd7c1 | 2001-01-09 00:35:42 +0000 | [diff] [blame] | 266 | len = st.st_size; |
| 267 | banner = xmalloc(len + 1); |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 268 | n = atomicio(read, fd, banner, len); |
| 269 | close(fd); |
| 270 | |
| 271 | if (n != len) { |
| 272 | free(banner); |
| 273 | return (NULL); |
| 274 | } |
Ben Lindstrom | 48bd7c1 | 2001-01-09 00:35:42 +0000 | [diff] [blame] | 275 | banner[n] = '\0'; |
Damien Miller | 5ad9fd9 | 2002-05-13 11:07:41 +1000 | [diff] [blame] | 276 | |
| 277 | return (banner); |
| 278 | } |
| 279 | |
| 280 | static void |
| 281 | userauth_banner(void) |
| 282 | { |
| 283 | char *banner = NULL; |
| 284 | |
| 285 | if (options.banner == NULL || (datafellows & SSH_BUG_BANNER)) |
| 286 | return; |
| 287 | |
| 288 | if ((banner = PRIVSEP(auth2_read_banner())) == NULL) |
| 289 | goto done; |
| 290 | |
Ben Lindstrom | 48bd7c1 | 2001-01-09 00:35:42 +0000 | [diff] [blame] | 291 | packet_start(SSH2_MSG_USERAUTH_BANNER); |
| 292 | packet_put_cstring(banner); |
| 293 | packet_put_cstring(""); /* language, unused */ |
| 294 | packet_send(); |
| 295 | debug("userauth_banner: sent"); |
| 296 | done: |
| 297 | if (banner) |
| 298 | xfree(banner); |
Ben Lindstrom | 48bd7c1 | 2001-01-09 00:35:42 +0000 | [diff] [blame] | 299 | return; |
| 300 | } |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 301 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 302 | static int |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 303 | userauth_none(Authctxt *authctxt) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 304 | { |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 305 | /* disable method "none", only allowed one time */ |
| 306 | Authmethod *m = authmethod_lookup("none"); |
| 307 | if (m != NULL) |
| 308 | m->enabled = NULL; |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 309 | packet_check_eom(); |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 310 | userauth_banner(); |
Damien Miller | b8c656e | 2000-06-28 15:22:41 +1000 | [diff] [blame] | 311 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 312 | if (authctxt->valid == 0) |
| 313 | return(0); |
Damien Miller | 3a5b023 | 2002-03-13 13:19:42 +1100 | [diff] [blame] | 314 | |
| 315 | #ifdef HAVE_CYGWIN |
| 316 | if (check_nt_auth(1, authctxt->pw) == 0) |
| 317 | return(0); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 318 | #endif |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 319 | return PRIVSEP(auth_password(authctxt, "")); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 320 | } |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 321 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 322 | static int |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 323 | userauth_passwd(Authctxt *authctxt) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 324 | { |
| 325 | char *password; |
| 326 | int authenticated = 0; |
| 327 | int change; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 328 | u_int len; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 329 | change = packet_get_char(); |
| 330 | if (change) |
| 331 | log("password change not supported"); |
| 332 | password = packet_get_string(&len); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 333 | packet_check_eom(); |
Damien Miller | 3a5b023 | 2002-03-13 13:19:42 +1100 | [diff] [blame] | 334 | if (authctxt->valid && |
| 335 | #ifdef HAVE_CYGWIN |
| 336 | check_nt_auth(1, authctxt->pw) && |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 337 | #endif |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 338 | PRIVSEP(auth_password(authctxt, password)) == 1) |
Damien Miller | 3a5b023 | 2002-03-13 13:19:42 +1100 | [diff] [blame] | 339 | authenticated = 1; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 340 | memset(password, 0, len); |
| 341 | xfree(password); |
| 342 | return authenticated; |
| 343 | } |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 344 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 345 | static int |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 346 | userauth_kbdint(Authctxt *authctxt) |
| 347 | { |
| 348 | int authenticated = 0; |
Ben Lindstrom | 551ea37 | 2001-06-05 18:56:16 +0000 | [diff] [blame] | 349 | char *lang, *devs; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 350 | |
| 351 | lang = packet_get_string(NULL); |
| 352 | devs = packet_get_string(NULL); |
Damien Miller | 48b03fc | 2002-01-22 23:11:40 +1100 | [diff] [blame] | 353 | packet_check_eom(); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 354 | |
Ben Lindstrom | 551ea37 | 2001-06-05 18:56:16 +0000 | [diff] [blame] | 355 | debug("keyboard-interactive devs %s", devs); |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 356 | |
Ben Lindstrom | 551ea37 | 2001-06-05 18:56:16 +0000 | [diff] [blame] | 357 | if (options.challenge_response_authentication) |
Ben Lindstrom | 95fb2dd | 2001-01-23 03:12:10 +0000 | [diff] [blame] | 358 | authenticated = auth2_challenge(authctxt, devs); |
Ben Lindstrom | db65e8f | 2001-01-19 04:26:52 +0000 | [diff] [blame] | 359 | |
Damien Miller | b848158 | 2000-12-03 11:51:51 +1100 | [diff] [blame] | 360 | #ifdef USE_PAM |
Damien Miller | f815442 | 2001-04-25 22:44:14 +1000 | [diff] [blame] | 361 | if (authenticated == 0 && options.pam_authentication_via_kbd_int) |
Damien Miller | b848158 | 2000-12-03 11:51:51 +1100 | [diff] [blame] | 362 | authenticated = auth2_pam(authctxt); |
| 363 | #endif |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 364 | xfree(devs); |
Ben Lindstrom | 551ea37 | 2001-06-05 18:56:16 +0000 | [diff] [blame] | 365 | xfree(lang); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 366 | #ifdef HAVE_CYGWIN |
Damien Miller | 0dea79d | 2001-12-29 14:08:28 +1100 | [diff] [blame] | 367 | if (check_nt_auth(0, authctxt->pw) == 0) |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 368 | return(0); |
| 369 | #endif |
| 370 | return authenticated; |
| 371 | } |
| 372 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 373 | static int |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 374 | userauth_pubkey(Authctxt *authctxt) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 375 | { |
| 376 | Buffer b; |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 377 | Key *key = NULL; |
Ben Lindstrom | 90fd814 | 2002-02-26 18:09:42 +0000 | [diff] [blame] | 378 | char *pkalg; |
| 379 | u_char *pkblob, *sig; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 380 | u_int alen, blen, slen; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 381 | int have_sig, pktype; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 382 | int authenticated = 0; |
| 383 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 384 | if (!authctxt->valid) { |
| 385 | debug2("userauth_pubkey: disabled because of invalid user"); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 386 | return 0; |
| 387 | } |
| 388 | have_sig = packet_get_char(); |
Ben Lindstrom | d121f61 | 2000-12-03 17:00:47 +0000 | [diff] [blame] | 389 | if (datafellows & SSH_BUG_PKAUTH) { |
| 390 | debug2("userauth_pubkey: SSH_BUG_PKAUTH"); |
| 391 | /* no explicit pkalg given */ |
| 392 | pkblob = packet_get_string(&blen); |
| 393 | buffer_init(&b); |
| 394 | buffer_append(&b, pkblob, blen); |
| 395 | /* so we have to extract the pkalg from the pkblob */ |
| 396 | pkalg = buffer_get_string(&b, &alen); |
| 397 | buffer_free(&b); |
| 398 | } else { |
| 399 | pkalg = packet_get_string(&alen); |
| 400 | pkblob = packet_get_string(&blen); |
| 401 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 402 | pktype = key_type_from_name(pkalg); |
| 403 | if (pktype == KEY_UNSPEC) { |
Ben Lindstrom | d121f61 | 2000-12-03 17:00:47 +0000 | [diff] [blame] | 404 | /* this is perfectly legal */ |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 405 | log("userauth_pubkey: unsupported public key algorithm: %s", |
| 406 | pkalg); |
| 407 | goto done; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 408 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 409 | key = key_from_blob(pkblob, blen); |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 410 | if (key == NULL) { |
| 411 | error("userauth_pubkey: cannot decode key: %s", pkalg); |
| 412 | goto done; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 413 | } |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 414 | if (key->type != pktype) { |
| 415 | error("userauth_pubkey: type mismatch for decoded key " |
| 416 | "(received %d, expected %d)", key->type, pktype); |
| 417 | goto done; |
| 418 | } |
| 419 | if (have_sig) { |
| 420 | sig = packet_get_string(&slen); |
| 421 | packet_check_eom(); |
| 422 | buffer_init(&b); |
| 423 | if (datafellows & SSH_OLD_SESSIONID) { |
| 424 | buffer_append(&b, session_id2, session_id2_len); |
| 425 | } else { |
| 426 | buffer_put_string(&b, session_id2, session_id2_len); |
| 427 | } |
| 428 | /* reconstruct packet */ |
| 429 | buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST); |
| 430 | buffer_put_cstring(&b, authctxt->user); |
| 431 | buffer_put_cstring(&b, |
| 432 | datafellows & SSH_BUG_PKSERVICE ? |
| 433 | "ssh-userauth" : |
| 434 | authctxt->service); |
| 435 | if (datafellows & SSH_BUG_PKAUTH) { |
| 436 | buffer_put_char(&b, have_sig); |
| 437 | } else { |
| 438 | buffer_put_cstring(&b, "publickey"); |
| 439 | buffer_put_char(&b, have_sig); |
| 440 | buffer_put_cstring(&b, pkalg); |
| 441 | } |
| 442 | buffer_put_string(&b, pkblob, blen); |
| 443 | #ifdef DEBUG_PK |
| 444 | buffer_dump(&b); |
| 445 | #endif |
| 446 | /* test for correct signature */ |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 447 | authenticated = 0; |
| 448 | if (PRIVSEP(user_key_allowed(authctxt->pw, key)) && |
| 449 | PRIVSEP(key_verify(key, sig, slen, buffer_ptr(&b), |
| 450 | buffer_len(&b))) == 1) |
Damien Miller | 3a5b023 | 2002-03-13 13:19:42 +1100 | [diff] [blame] | 451 | authenticated = 1; |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 452 | buffer_clear(&b); |
| 453 | xfree(sig); |
| 454 | } else { |
| 455 | debug("test whether pkalg/pkblob are acceptable"); |
| 456 | packet_check_eom(); |
| 457 | |
| 458 | /* XXX fake reply and always send PK_OK ? */ |
| 459 | /* |
| 460 | * XXX this allows testing whether a user is allowed |
| 461 | * to login: if you happen to have a valid pubkey this |
| 462 | * message is sent. the message is NEVER sent at all |
| 463 | * if a user is not allowed to login. is this an |
| 464 | * issue? -markus |
| 465 | */ |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 466 | if (PRIVSEP(user_key_allowed(authctxt->pw, key))) { |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 467 | packet_start(SSH2_MSG_USERAUTH_PK_OK); |
| 468 | packet_put_string(pkalg, alen); |
| 469 | packet_put_string(pkblob, blen); |
| 470 | packet_send(); |
| 471 | packet_write_wait(); |
| 472 | authctxt->postponed = 1; |
| 473 | } |
| 474 | } |
| 475 | if (authenticated != 1) |
| 476 | auth_clear_options(); |
| 477 | done: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 478 | debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg); |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 479 | if (key != NULL) |
| 480 | key_free(key); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 481 | xfree(pkalg); |
| 482 | xfree(pkblob); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 483 | #ifdef HAVE_CYGWIN |
Damien Miller | 0dea79d | 2001-12-29 14:08:28 +1100 | [diff] [blame] | 484 | if (check_nt_auth(0, authctxt->pw) == 0) |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 485 | return(0); |
| 486 | #endif |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 487 | return authenticated; |
| 488 | } |
| 489 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 490 | static int |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 491 | userauth_hostbased(Authctxt *authctxt) |
| 492 | { |
| 493 | Buffer b; |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 494 | Key *key = NULL; |
Ben Lindstrom | 90fd814 | 2002-02-26 18:09:42 +0000 | [diff] [blame] | 495 | char *pkalg, *cuser, *chost, *service; |
| 496 | u_char *pkblob, *sig; |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 497 | u_int alen, blen, slen; |
| 498 | int pktype; |
| 499 | int authenticated = 0; |
| 500 | |
| 501 | if (!authctxt->valid) { |
| 502 | debug2("userauth_hostbased: disabled because of invalid user"); |
| 503 | return 0; |
| 504 | } |
| 505 | pkalg = packet_get_string(&alen); |
| 506 | pkblob = packet_get_string(&blen); |
| 507 | chost = packet_get_string(NULL); |
| 508 | cuser = packet_get_string(NULL); |
| 509 | sig = packet_get_string(&slen); |
| 510 | |
| 511 | debug("userauth_hostbased: cuser %s chost %s pkalg %s slen %d", |
| 512 | cuser, chost, pkalg, slen); |
| 513 | #ifdef DEBUG_PK |
| 514 | debug("signature:"); |
| 515 | buffer_init(&b); |
| 516 | buffer_append(&b, sig, slen); |
| 517 | buffer_dump(&b); |
| 518 | buffer_free(&b); |
| 519 | #endif |
| 520 | pktype = key_type_from_name(pkalg); |
| 521 | if (pktype == KEY_UNSPEC) { |
| 522 | /* this is perfectly legal */ |
| 523 | log("userauth_hostbased: unsupported " |
| 524 | "public key algorithm: %s", pkalg); |
| 525 | goto done; |
| 526 | } |
| 527 | key = key_from_blob(pkblob, blen); |
| 528 | if (key == NULL) { |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 529 | error("userauth_hostbased: cannot decode key: %s", pkalg); |
| 530 | goto done; |
| 531 | } |
| 532 | if (key->type != pktype) { |
| 533 | error("userauth_hostbased: type mismatch for decoded key " |
| 534 | "(received %d, expected %d)", key->type, pktype); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 535 | goto done; |
| 536 | } |
Ben Lindstrom | 671388f | 2001-04-19 20:40:45 +0000 | [diff] [blame] | 537 | service = datafellows & SSH_BUG_HBSERVICE ? "ssh-userauth" : |
| 538 | authctxt->service; |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 539 | buffer_init(&b); |
Ben Lindstrom | 671388f | 2001-04-19 20:40:45 +0000 | [diff] [blame] | 540 | buffer_put_string(&b, session_id2, session_id2_len); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 541 | /* reconstruct packet */ |
| 542 | buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST); |
| 543 | buffer_put_cstring(&b, authctxt->user); |
Ben Lindstrom | 671388f | 2001-04-19 20:40:45 +0000 | [diff] [blame] | 544 | buffer_put_cstring(&b, service); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 545 | buffer_put_cstring(&b, "hostbased"); |
| 546 | buffer_put_string(&b, pkalg, alen); |
| 547 | buffer_put_string(&b, pkblob, blen); |
| 548 | buffer_put_cstring(&b, chost); |
| 549 | buffer_put_cstring(&b, cuser); |
| 550 | #ifdef DEBUG_PK |
| 551 | buffer_dump(&b); |
| 552 | #endif |
| 553 | /* test for allowed key and correct signature */ |
Ben Lindstrom | 7a2073c | 2002-03-22 02:30:41 +0000 | [diff] [blame] | 554 | authenticated = 0; |
| 555 | if (PRIVSEP(hostbased_key_allowed(authctxt->pw, cuser, chost, key)) && |
| 556 | PRIVSEP(key_verify(key, sig, slen, buffer_ptr(&b), |
| 557 | buffer_len(&b))) == 1) |
Damien Miller | 3a5b023 | 2002-03-13 13:19:42 +1100 | [diff] [blame] | 558 | authenticated = 1; |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 559 | |
| 560 | buffer_clear(&b); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 561 | done: |
| 562 | debug2("userauth_hostbased: authenticated %d", authenticated); |
Damien Miller | 9b74bfc | 2002-02-05 12:26:03 +1100 | [diff] [blame] | 563 | if (key != NULL) |
| 564 | key_free(key); |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 565 | xfree(pkalg); |
| 566 | xfree(pkblob); |
| 567 | xfree(cuser); |
| 568 | xfree(chost); |
| 569 | xfree(sig); |
| 570 | return authenticated; |
| 571 | } |
| 572 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 573 | /* get current user */ |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 574 | |
| 575 | struct passwd* |
| 576 | auth_get_user(void) |
| 577 | { |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 578 | return (x_authctxt != NULL && x_authctxt->valid) ? x_authctxt->pw : NULL; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 579 | } |
| 580 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 581 | #define DELIM "," |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 582 | |
Ben Lindstrom | 7907382 | 2001-07-04 03:42:30 +0000 | [diff] [blame] | 583 | static char * |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 584 | authmethods_get(void) |
| 585 | { |
Damien Miller | 0e3b872 | 2002-01-22 23:26:38 +1100 | [diff] [blame] | 586 | Buffer b; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 587 | char *list; |
Ben Lindstrom | 511bb24 | 2002-06-06 20:52:37 +0000 | [diff] [blame^] | 588 | int i; |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 589 | |
Damien Miller | 0e3b872 | 2002-01-22 23:26:38 +1100 | [diff] [blame] | 590 | buffer_init(&b); |
Ben Lindstrom | 511bb24 | 2002-06-06 20:52:37 +0000 | [diff] [blame^] | 591 | for (i = 0; authmethods[i] != NULL; i++) { |
| 592 | if (strcmp(authmethods[i]->name, "none") == 0) |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 593 | continue; |
Ben Lindstrom | 511bb24 | 2002-06-06 20:52:37 +0000 | [diff] [blame^] | 594 | if (authmethods[i]->enabled != NULL && |
| 595 | *(authmethods[i]->enabled) != 0) { |
Damien Miller | 0e3b872 | 2002-01-22 23:26:38 +1100 | [diff] [blame] | 596 | if (buffer_len(&b) > 0) |
| 597 | buffer_append(&b, ",", 1); |
Ben Lindstrom | 511bb24 | 2002-06-06 20:52:37 +0000 | [diff] [blame^] | 598 | buffer_append(&b, authmethods[i]->name, |
| 599 | strlen(authmethods[i]->name)); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 600 | } |
| 601 | } |
Damien Miller | 0e3b872 | 2002-01-22 23:26:38 +1100 | [diff] [blame] | 602 | buffer_append(&b, "\0", 1); |
| 603 | list = xstrdup(buffer_ptr(&b)); |
| 604 | buffer_free(&b); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 605 | return list; |
| 606 | } |
| 607 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 608 | static Authmethod * |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 609 | authmethod_lookup(const char *name) |
| 610 | { |
Ben Lindstrom | 511bb24 | 2002-06-06 20:52:37 +0000 | [diff] [blame^] | 611 | int i; |
| 612 | |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 613 | if (name != NULL) |
Ben Lindstrom | 511bb24 | 2002-06-06 20:52:37 +0000 | [diff] [blame^] | 614 | for (i = 0; authmethods[i] != NULL; i++) |
| 615 | if (authmethods[i]->enabled != NULL && |
| 616 | *(authmethods[i]->enabled) != 0 && |
| 617 | strcmp(name, authmethods[i]->name) == 0) |
| 618 | return authmethods[i]; |
| 619 | debug2("Unrecognized authentication method name: %s", |
| 620 | name ? name : "NULL"); |
Damien Miller | 874d77b | 2000-10-14 16:23:11 +1100 | [diff] [blame] | 621 | return NULL; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 622 | } |