Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 1 | /* |
Damien Miller | e69f18c | 2000-06-12 16:38:54 +1000 | [diff] [blame] | 2 | * Copyright (c) 2000 Damien Miller. 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 | e69f18c | 2000-06-12 16:38:54 +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. |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 23 | */ |
| 24 | |
| 25 | #include "includes.h" |
| 26 | |
| 27 | #ifdef USE_PAM |
| 28 | #include "ssh.h" |
| 29 | #include "xmalloc.h" |
| 30 | #include "servconf.h" |
| 31 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 32 | RCSID("$Id: auth-pam.c,v 1.13 2000/09/16 05:09:27 djm Exp $"); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 33 | |
| 34 | #define NEW_AUTHTOK_MSG \ |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 35 | "Warning: Your password has expired, please change it now" |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 36 | |
| 37 | /* Callbacks */ |
| 38 | static int pamconv(int num_msg, const struct pam_message **msg, |
| 39 | struct pam_response **resp, void *appdata_ptr); |
| 40 | void pam_cleanup_proc(void *context); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 41 | void pam_msg_cat(const char *msg); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 42 | |
| 43 | /* module-local variables */ |
| 44 | static struct pam_conv conv = { |
| 45 | pamconv, |
| 46 | NULL |
| 47 | }; |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 48 | static pam_handle_t *pamh = NULL; |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 49 | static const char *pampasswd = NULL; |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 50 | static char *pam_msg = NULL; |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 51 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 52 | /* states for pamconv() */ |
| 53 | typedef enum { INITIAL_LOGIN, OTHER } pamstates; |
| 54 | static pamstates pamstate = INITIAL_LOGIN; |
| 55 | /* remember whether pam_acct_mgmt() returned PAM_NEWAUTHTOK_REQD */ |
| 56 | static int password_change_required = 0; |
| 57 | |
| 58 | /* |
| 59 | * PAM conversation function. |
| 60 | * There are two states this can run in. |
| 61 | * |
| 62 | * INITIAL_LOGIN mode simply feeds the password from the client into |
| 63 | * PAM in response to PAM_PROMPT_ECHO_OFF, and collects output |
| 64 | * messages with pam_msg_cat(). This is used during initial |
| 65 | * authentication to bypass the normal PAM password prompt. |
| 66 | * |
| 67 | * OTHER mode handles PAM_PROMPT_ECHO_OFF with read_passphrase(prompt, 1) |
| 68 | * and outputs messages to stderr. This mode is used if pam_chauthtok() |
| 69 | * is called to update expired passwords. |
| 70 | */ |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 71 | static int pamconv(int num_msg, const struct pam_message **msg, |
| 72 | struct pam_response **resp, void *appdata_ptr) |
| 73 | { |
| 74 | struct pam_response *reply; |
| 75 | int count; |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 76 | char buf[1024]; |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 77 | |
| 78 | /* PAM will free this later */ |
| 79 | reply = malloc(num_msg * sizeof(*reply)); |
| 80 | if (reply == NULL) |
| 81 | return PAM_CONV_ERR; |
| 82 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 83 | for (count = 0; count < num_msg; count++) { |
| 84 | switch ((*msg)[count].msg_style) { |
| 85 | case PAM_PROMPT_ECHO_ON: |
| 86 | fputs((*msg)[count].msg, stderr); |
| 87 | fgets(buf, sizeof(buf), stdin); |
| 88 | reply[count].resp = xstrdup(buf); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 89 | reply[count].resp_retcode = PAM_SUCCESS; |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 90 | break; |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 91 | case PAM_PROMPT_ECHO_OFF: |
| 92 | if (pamstate == INITIAL_LOGIN) { |
| 93 | if (pampasswd == NULL) { |
| 94 | free(reply); |
| 95 | return PAM_CONV_ERR; |
| 96 | } |
| 97 | reply[count].resp = xstrdup(pampasswd); |
| 98 | } else |
| 99 | reply[count].resp = xstrdup(read_passphrase((*msg)[count].msg, 1)); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 100 | reply[count].resp_retcode = PAM_SUCCESS; |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 101 | break; |
| 102 | case PAM_ERROR_MSG: |
| 103 | case PAM_TEXT_INFO: |
| 104 | if ((*msg)[count].msg != NULL) { |
| 105 | if (pamstate == INITIAL_LOGIN) |
| 106 | pam_msg_cat((*msg)[count].msg); |
| 107 | else { |
| 108 | fputs((*msg)[count].msg, stderr); |
| 109 | fputs("\n", stderr); |
| 110 | } |
| 111 | } |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 112 | reply[count].resp = xstrdup(""); |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 113 | reply[count].resp_retcode = PAM_SUCCESS; |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 114 | break; |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 115 | default: |
| 116 | free(reply); |
| 117 | return PAM_CONV_ERR; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | *resp = reply; |
| 122 | |
| 123 | return PAM_SUCCESS; |
| 124 | } |
| 125 | |
| 126 | /* Called at exit to cleanly shutdown PAM */ |
| 127 | void pam_cleanup_proc(void *context) |
| 128 | { |
| 129 | int pam_retval; |
| 130 | |
| 131 | if (pamh != NULL) |
| 132 | { |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 133 | pam_retval = pam_close_session(pamh, 0); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 134 | if (pam_retval != PAM_SUCCESS) { |
| 135 | log("Cannot close PAM session: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 136 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 137 | } |
| 138 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 139 | pam_retval = pam_setcred(pamh, PAM_DELETE_CRED); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 140 | if (pam_retval != PAM_SUCCESS) { |
Damien Miller | 7cfaaf2 | 2000-08-30 09:57:49 +1100 | [diff] [blame] | 141 | debug("Cannot delete credentials: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 142 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 143 | } |
| 144 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 145 | pam_retval = pam_end(pamh, pam_retval); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 146 | if (pam_retval != PAM_SUCCESS) { |
| 147 | log("Cannot release PAM authentication: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 148 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 149 | } |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | /* Attempt password authentation using PAM */ |
| 154 | int auth_pam_password(struct passwd *pw, const char *password) |
| 155 | { |
| 156 | extern ServerOptions options; |
| 157 | int pam_retval; |
| 158 | |
| 159 | /* deny if no user. */ |
| 160 | if (pw == NULL) |
| 161 | return 0; |
| 162 | if (pw->pw_uid == 0 && options.permit_root_login == 2) |
| 163 | return 0; |
| 164 | if (*password == '\0' && options.permit_empty_passwd == 0) |
| 165 | return 0; |
| 166 | |
| 167 | pampasswd = password; |
| 168 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 169 | pamstate = INITIAL_LOGIN; |
| 170 | pam_retval = pam_authenticate(pamh, 0); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 171 | if (pam_retval == PAM_SUCCESS) { |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 172 | debug("PAM Password authentication accepted for user \"%.100s\"", |
| 173 | pw->pw_name); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 174 | return 1; |
| 175 | } else { |
| 176 | debug("PAM Password authentication for \"%.100s\" failed: %s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 177 | pw->pw_name, PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 178 | return 0; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | /* Do account management using PAM */ |
| 183 | int do_pam_account(char *username, char *remote_user) |
| 184 | { |
| 185 | int pam_retval; |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 186 | |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 187 | debug("PAM setting rhost to \"%.200s\"", get_canonical_hostname()); |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 188 | pam_retval = pam_set_item(pamh, PAM_RHOST, |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 189 | get_canonical_hostname()); |
| 190 | if (pam_retval != PAM_SUCCESS) { |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 191 | fatal("PAM set rhost failed: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 192 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | if (remote_user != NULL) { |
| 196 | debug("PAM setting ruser to \"%.200s\"", remote_user); |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 197 | pam_retval = pam_set_item(pamh, PAM_RUSER, remote_user); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 198 | if (pam_retval != PAM_SUCCESS) { |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 199 | fatal("PAM set ruser failed: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 200 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 201 | } |
| 202 | } |
| 203 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 204 | pam_retval = pam_acct_mgmt(pamh, 0); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 205 | switch (pam_retval) { |
| 206 | case PAM_SUCCESS: |
| 207 | /* This is what we want */ |
| 208 | break; |
| 209 | case PAM_NEW_AUTHTOK_REQD: |
| 210 | pam_msg_cat(NEW_AUTHTOK_MSG); |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 211 | /* flag that password change is necessary */ |
| 212 | password_change_required = 1; |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 213 | break; |
| 214 | default: |
| 215 | log("PAM rejected by account configuration: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 216 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 217 | return(0); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | return(1); |
| 221 | } |
| 222 | |
| 223 | /* Do PAM-specific session initialisation */ |
Damien Miller | 3e955e7 | 2000-01-27 10:55:38 +1100 | [diff] [blame] | 224 | void do_pam_session(char *username, const char *ttyname) |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 225 | { |
| 226 | int pam_retval; |
| 227 | |
| 228 | if (ttyname != NULL) { |
| 229 | debug("PAM setting tty to \"%.200s\"", ttyname); |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 230 | pam_retval = pam_set_item(pamh, PAM_TTY, ttyname); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 231 | if (pam_retval != PAM_SUCCESS) { |
| 232 | fatal("PAM set tty failed: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 233 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 234 | } |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 235 | } |
| 236 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 237 | pam_retval = pam_open_session(pamh, 0); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 238 | if (pam_retval != PAM_SUCCESS) { |
| 239 | fatal("PAM session setup failed: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 240 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 241 | } |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | /* Set PAM credentials */ |
| 245 | void do_pam_setcred() |
| 246 | { |
| 247 | int pam_retval; |
| 248 | |
| 249 | debug("PAM establishing creds"); |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 250 | pam_retval = pam_setcred(pamh, PAM_ESTABLISH_CRED); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 251 | if (pam_retval != PAM_SUCCESS) { |
| 252 | fatal("PAM setcred failed: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 253 | PAM_STRERROR(pamh, pam_retval)); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /* |
| 258 | * Have user change authentication token if pam_acct_mgmt() indicated |
| 259 | * it was expired. This needs to be called after an interactive |
| 260 | * session is established and the user's pty is connected to |
| 261 | * stdin/stout/stderr. |
| 262 | */ |
| 263 | void do_pam_chauthtok() |
| 264 | { |
| 265 | int pam_retval; |
| 266 | |
| 267 | if (password_change_required) { |
| 268 | pamstate = OTHER; |
| 269 | do { |
| 270 | pam_retval = pam_chauthtok(pamh, PAM_CHANGE_EXPIRED_AUTHTOK); |
| 271 | } while (pam_retval != PAM_SUCCESS); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 272 | } |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | /* Cleanly shutdown PAM */ |
| 276 | void finish_pam(void) |
| 277 | { |
| 278 | pam_cleanup_proc(NULL); |
| 279 | fatal_remove_cleanup(&pam_cleanup_proc, NULL); |
| 280 | } |
| 281 | |
| 282 | /* Start PAM authentication for specified account */ |
| 283 | void start_pam(struct passwd *pw) |
| 284 | { |
| 285 | int pam_retval; |
| 286 | |
| 287 | debug("Starting up PAM with username \"%.200s\"", pw->pw_name); |
| 288 | |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 289 | pam_retval = pam_start(SSHD_PAM_SERVICE, pw->pw_name, &conv, &pamh); |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 290 | |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 291 | if (pam_retval != PAM_SUCCESS) { |
| 292 | fatal("PAM initialisation failed: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 293 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 294 | } |
Damien Miller | c19fd5f | 2000-06-22 21:44:54 +1000 | [diff] [blame] | 295 | |
Damien Miller | 4e99720 | 2000-07-09 21:21:52 +1000 | [diff] [blame] | 296 | #ifdef PAM_TTY_KLUDGE |
Damien Miller | c19fd5f | 2000-06-22 21:44:54 +1000 | [diff] [blame] | 297 | /* |
| 298 | * Some PAM modules (e.g. pam_time) require a TTY to operate, |
| 299 | * and will fail in various stupid ways if they don't get one. |
| 300 | * sshd doesn't set the tty until too late in the auth process and may |
| 301 | * not even need one (for tty-less connections) |
| 302 | * Kludge: Set a fake PAM_TTY |
| 303 | */ |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 304 | pam_retval = pam_set_item(pamh, PAM_TTY, "ssh"); |
Damien Miller | 7b22d65 | 2000-06-18 14:07:04 +1000 | [diff] [blame] | 305 | if (pam_retval != PAM_SUCCESS) { |
| 306 | fatal("PAM set tty failed: %.200s", |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 307 | PAM_STRERROR(pamh, pam_retval)); |
Damien Miller | 7b22d65 | 2000-06-18 14:07:04 +1000 | [diff] [blame] | 308 | } |
Damien Miller | 4e99720 | 2000-07-09 21:21:52 +1000 | [diff] [blame] | 309 | #endif /* PAM_TTY_KLUDGE */ |
Damien Miller | 7b22d65 | 2000-06-18 14:07:04 +1000 | [diff] [blame] | 310 | |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 311 | fatal_add_cleanup(&pam_cleanup_proc, NULL); |
| 312 | } |
| 313 | |
| 314 | /* Return list of PAM enviornment strings */ |
| 315 | char **fetch_pam_environment(void) |
| 316 | { |
Damien Miller | 1bead33 | 2000-04-30 00:47:29 +1000 | [diff] [blame] | 317 | #ifdef HAVE_PAM_GETENVLIST |
Damien Miller | 9d5705a | 2000-09-16 16:09:27 +1100 | [diff] [blame] | 318 | return(pam_getenvlist(pamh)); |
Damien Miller | 1bead33 | 2000-04-30 00:47:29 +1000 | [diff] [blame] | 319 | #else /* HAVE_PAM_GETENVLIST */ |
| 320 | return(NULL); |
| 321 | #endif /* HAVE_PAM_GETENVLIST */ |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | /* Print any messages that have been generated during authentication */ |
| 325 | /* or account checking to stderr */ |
| 326 | void print_pam_messages(void) |
| 327 | { |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 328 | if (pam_msg != NULL) |
Damien Miller | f9b625c | 2000-07-09 22:42:32 +1000 | [diff] [blame] | 329 | fputs(pam_msg, stderr); |
Damien Miller | 2f6a0ad | 2000-05-31 11:20:11 +1000 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | /* Append a message to the PAM message buffer */ |
| 333 | void pam_msg_cat(const char *msg) |
| 334 | { |
| 335 | char *p; |
| 336 | size_t new_msg_len; |
| 337 | size_t pam_msg_len; |
| 338 | |
| 339 | new_msg_len = strlen(msg); |
| 340 | |
| 341 | if (pam_msg) { |
| 342 | pam_msg_len = strlen(pam_msg); |
| 343 | pam_msg = xrealloc(pam_msg, new_msg_len + pam_msg_len + 2); |
| 344 | p = pam_msg + pam_msg_len; |
| 345 | } else { |
| 346 | pam_msg = p = xmalloc(new_msg_len + 2); |
| 347 | } |
| 348 | |
| 349 | memcpy(p, msg, new_msg_len); |
| 350 | p[new_msg_len] = '\n'; |
| 351 | p[new_msg_len + 1] = '\0'; |
Damien Miller | e72b7af | 1999-12-30 15:08:44 +1100 | [diff] [blame] | 352 | } |
| 353 | |
| 354 | #endif /* USE_PAM */ |