2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
16 #include <afsconfig.h>
17 #include <afs/param.h>
19 #include <security/pam_appl.h>
20 #include <security/pam_modules.h>
25 #include <sys/param.h>
26 #include <afs/kautils.h>
27 #include "afs_message.h"
32 #define RET(x) { retcode = (x); goto out; }
34 #if defined(AFS_KERBEROS_ENV)
35 extern char *ktc_tkt_string();
39 pam_sm_setcred(pam_handle_t * pamh, int flags, int argc, const char **argv)
41 int retcode = PAM_SUCCESS;
42 int errcode = PAM_SUCCESS;
44 int logmask = LOG_UPTO(LOG_INFO);
46 int use_first_pass = 1; /* use the password passed in by auth */
47 int try_first_pass = 0;
51 uid_t ignore_uid_id = 0;
52 int refresh_token = 0;
53 int set_expires = 0; /* the default is to not to set the env variable */
56 struct pam_conv *pam_convp = NULL;
57 char my_password_buf[256];
58 char *cell_ptr = NULL;
60 char *password = NULL;
61 int torch_password = 1;
65 int password_expires = -1;
67 struct passwd unix_pwd, *upwd = NULL;
68 char upwd_buf[2048]; /* size is a guess. */
71 openlog(pam_afs_ident, LOG_CONS, LOG_AUTH);
73 origmask = setlogmask(logmask);
76 * Parse the user options. Log an error for any unknown options.
78 for (i = 0; i < argc; i++) {
79 if (strcasecmp(argv[i], "debug") == 0) {
80 logmask |= LOG_MASK(LOG_DEBUG);
81 (void)setlogmask(logmask);
82 } else if (strcasecmp(argv[i], "nowarn") == 0) {
84 } else if (strcasecmp(argv[i], "use_first_pass") == 0) {
85 use_first_pass = 1; /* practically redundant */
86 } else if (strcasecmp(argv[i], "try_first_pass") == 0) {
88 } else if (strcasecmp(argv[i], "ignore_root") == 0) {
91 } else if (strcasecmp(argv[i], "ignore_uid") == 0) {
94 pam_afs_syslog(LOG_ERR, PAMAFS_IGNOREUID,
95 "ignore_uid missing argument");
99 ignore_uid_id = (uid_t) strtol(argv[i], (char **)NULL, 10);
100 if ((0 > ignore_uid_id) || (ignore_uid_id > IGNORE_MAX)) {
102 pam_afs_syslog(LOG_ERR, PAMAFS_IGNOREUID, argv[i]);
105 } else if (strcasecmp(argv[i], "cell") == 0) {
108 pam_afs_syslog(LOG_ERR, PAMAFS_OTHERCELL,
109 "cell missing argument");
112 pam_afs_syslog(LOG_INFO, PAMAFS_OTHERCELL, cell_ptr);
114 } else if (strcasecmp(argv[i], "no_unlog") == 0) {
116 } else if (strcasecmp(argv[i], "refresh_token") == 0) {
118 } else if (strcasecmp(argv[i], "set_token") == 0) {
120 } else if (strcasecmp(argv[i], "dont_fork") == 0) {
122 } else if (strcasecmp(argv[i], "use_klog") == 0) {
124 } else if (strcasecmp(argv[i], "setenv_password_expires") == 0) {
127 pam_afs_syslog(LOG_ERR, PAMAFS_UNKNOWNOPT, argv[i]);
134 if (logmask && LOG_MASK(LOG_DEBUG))
135 pam_afs_syslog(LOG_DEBUG, PAMAFS_OPTIONS, nowarn, use_first_pass,
136 try_first_pass, ignore_uid, ignore_uid_id, 8, 8, 8, 8);
137 /* Try to get the user-interaction info, if available. */
138 errcode = pam_get_item(pamh, PAM_CONV, (const void **)&pam_convp);
139 if (errcode != PAM_SUCCESS) {
140 if (logmask && LOG_MASK(LOG_DEBUG))
141 pam_afs_syslog(LOG_DEBUG, PAMAFS_NO_USER_INT);
145 /* Who are we trying to authenticate here? */
147 pam_get_user(pamh, (const char **)&user,
148 "AFS username:")) != PAM_SUCCESS) {
149 pam_afs_syslog(LOG_ERR, PAMAFS_NOUSER, errcode);
150 RET(PAM_USER_UNKNOWN);
153 * If the user has a "local" (or via nss, possibly nss_dce) pwent,
154 * and its uid==0, and "ignore_root" was given in pam.conf,
157 /* enhanced: use "ignore_uid <number>" to specify the largest uid
158 * which should be ignored by this module
160 #if defined(AFS_HPUX_ENV)
161 #if defined(AFS_HPUX110_ENV)
162 i = getpwnam_r(user, &unix_pwd, upwd_buf, sizeof(upwd_buf), &upwd);
163 #else /* AFS_HPUX110_ENV */
164 i = getpwnam_r(user, &unix_pwd, upwd_buf, sizeof(upwd_buf));
165 if (i == 0) /* getpwnam_r success */
167 #endif /* AFS_HPUX110_ENV */
168 if (ignore_uid && i == 0 && upwd->pw_uid <= ignore_uid_id) {
169 pam_afs_syslog(LOG_INFO, PAMAFS_IGNORINGROOT, user);
173 #if defined(AFS_LINUX20_ENV) || defined(AFS_FBSD_ENV) || defined(AFS_NBSD_ENV)
174 upwd = getpwnam(user);
176 upwd = getpwnam_r(user, &unix_pwd, upwd_buf, sizeof(upwd_buf));
178 if (ignore_uid && upwd != NULL && upwd->pw_uid <= ignore_uid_id) {
179 pam_afs_syslog(LOG_INFO, PAMAFS_IGNORINGROOT, user);
184 if (flags & PAM_DELETE_CRED) {
185 if (logmask && LOG_MASK(LOG_DEBUG))
186 pam_afs_syslog(LOG_DEBUG, PAMAFS_DELCRED, user);
189 } else if (flags & PAM_REINITIALIZE_CRED) {
191 if (logmask && LOG_MASK(LOG_DEBUG))
192 pam_afs_syslog(LOG_DEBUG, PAMAFS_REINITCRED, user);
195 } else { /* flags are PAM_REFRESH_CRED, PAM_ESTABLISH_CRED, unknown */
197 if (logmask && LOG_MASK(LOG_DEBUG))
198 pam_afs_syslog(LOG_DEBUG, PAMAFS_ESTABCRED, user);
200 errcode = pam_get_data(pamh, pam_afs_lh, (const void **)&password);
201 if (errcode != PAM_SUCCESS || password == NULL) {
202 if (use_first_pass) {
203 pam_afs_syslog(LOG_ERR, PAMAFS_PASSWD_REQ, user);
206 password = NULL; /* In case it isn't already NULL */
207 if (logmask && LOG_MASK(LOG_DEBUG))
208 pam_afs_syslog(LOG_DEBUG, PAMAFS_NOFIRSTPASS, user);
209 } else if (password[0] == '\0') {
210 /* Actually we *did* get one but it was empty. */
213 /* So don't use it. */
215 if (use_first_pass) {
216 pam_afs_syslog(LOG_ERR, PAMAFS_PASSWD_REQ, user);
217 RET(PAM_NEW_AUTHTOK_REQD);
219 if (logmask && LOG_MASK(LOG_DEBUG))
220 pam_afs_syslog(LOG_DEBUG, PAMAFS_NILPASSWORD, user);
222 if (logmask && LOG_MASK(LOG_DEBUG))
223 pam_afs_syslog(LOG_DEBUG, PAMAFS_GOTPASS, user);
227 if (!(use_first_pass || try_first_pass)) {
232 if (password == NULL) {
237 RET(PAM_AUTH_ERR); /* shouldn't happen */
239 try_first_pass = 0; /* we come back if try_first_pass==1 below */
241 if (pam_convp == NULL || pam_convp->conv == NULL) {
242 pam_afs_syslog(LOG_ERR, PAMAFS_CANNOT_PROMPT);
247 pam_afs_prompt(pam_convp, &password, 0, PAMAFS_PWD_PROMPT);
248 if (errcode != PAM_SUCCESS || password == NULL) {
249 pam_afs_syslog(LOG_ERR, PAMAFS_GETPASS_FAILED);
252 if (password[0] == '\0') {
253 if (logmask && LOG_MASK(LOG_DEBUG))
254 pam_afs_syslog(LOG_DEBUG, PAMAFS_NILPASSWORD);
255 RET(PAM_NEW_AUTHTOK_REQD);
258 * We aren't going to free the password later (we will wipe it,
259 * though), because the storage for it if we get it from other
260 * paths may belong to someone else. Since we do need to free
261 * this storage, copy it to a buffer that won't need to be freed
262 * later, and free this storage now.
265 strncpy(my_password_buf, password, sizeof(my_password_buf));
266 my_password_buf[sizeof(my_password_buf) - 1] = '\0';
267 memset(password, 0, strlen(password));
269 password = my_password_buf;
272 * We only set a PAG here, if we haven't got one before in
273 * pam_sm_authenticate() or if it was destroyed by the application
275 if ((!refresh_token) && (getPAG() == -1)) {
276 if (logmask && LOG_MASK(LOG_DEBUG))
277 syslog(LOG_DEBUG, "New PAG created in pam_setcred()");
279 #ifdef AFS_KERBEROS_ENV
284 if (flags & PAM_REFRESH_CRED) {
286 auth_ok = !do_klog(user, password, "00:00:01", cell_ptr);
287 ktc_ForgetAllTokens();
289 if (ka_VerifyUserPassword(KA_USERAUTH_VERSION, user, /* kerberos name */
291 cell_ptr, /* realm */
292 password, /* password */
294 &reason /* error string */
296 pam_afs_syslog(LOG_ERR, PAMAFS_LOGIN_FAILED, user,
304 if (flags & PAM_ESTABLISH_CRED) {
306 auth_ok = !do_klog(user, password, NULL, cell_ptr);
308 if (ka_UserAuthenticateGeneral(KA_USERAUTH_VERSION, user, /* kerberos name */
310 cell_ptr, /* realm */
311 password, /* password */
312 0, /* default lifetime */
313 &password_expires, 0, /* spare 2 */
314 &reason /* error string */
316 pam_afs_syslog(LOG_ERR, PAMAFS_LOGIN_FAILED, user,
324 if (!auth_ok && try_first_pass) {
329 /* pam_sm_authenticate should have set this
330 * if (auth_ok && !got_authtok) {
331 * torch_password = 0;
332 * (void) pam_set_item(pamh, PAM_AUTHTOK, password);
337 if (set_expires && !use_klog && (password_expires >= 0)) {
338 strcpy(sbuffer, "PASSWORD_EXPIRES=");
339 strcat(sbuffer, cv2string(&sbuffer[100], password_expires));
340 errcode = pam_putenv(pamh, sbuffer);
341 if (errcode != PAM_SUCCESS)
342 pam_afs_syslog(LOG_ERR, PAMAFS_PASSEXPFAIL, user);
344 #if defined(AFS_KERBEROS_ENV)
346 if (chown(ktc_tkt_string(), upwd->pw_uid, upwd->pw_gid) < 0)
347 pam_afs_syslog(LOG_ERR, PAMAFS_CHOWNKRB, user);
348 sprintf(sbuffer, "KRBTKFILE=%s", ktc_tkt_string());
349 errcode = pam_putenv(pamh, sbuffer);
350 if (errcode != PAM_SUCCESS)
351 pam_afs_syslog(LOG_ERR, PAMAFS_KRBFAIL, user);
362 if (password && torch_password)
363 memset(password, 0, strlen(password));
364 (void)setlogmask(origmask);
365 #ifndef AFS_SUN56_ENV