293 lines
8.3 KiB
Plaintext
293 lines
8.3 KiB
Plaintext
/*
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* $Id: pam_unix_acct.-c,v 1.6 1997/01/04 20:37:15 morgan Exp morgan $
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*
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* $Log: pam_unix_acct.-c,v $
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* Revision 1.6 1997/01/04 20:37:15 morgan
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* extra debugging
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*
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* Revision 1.5 1996/12/01 03:05:54 morgan
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* debugging with _pam_macros.h
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*
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* Revision 1.4 1996/11/10 21:03:57 morgan
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* pwdb conversion
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*
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* Revision 1.3 1996/09/05 06:45:45 morgan
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* tidied shadow acct management
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*
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* Revision 1.2 1996/09/01 01:13:14 morgan
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* Cristian Gafton's patches
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*
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* Revision 1.1 1996/08/29 13:27:51 morgan
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* Initial revision
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*
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*
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* See end of file for copyright information
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*/
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static const char rcsid_acct[] =
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"$Id: pam_unix_acct.-c,v 1.6 1997/01/04 20:37:15 morgan Exp morgan $\n"
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" - PAM_PWDB account management <gafton@redhat.com>";
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/* the shadow suite has accout managment.. */
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static int _shadow_acct_mgmt_exp(pam_handle_t *pamh, unsigned int ctrl,
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const struct pwdb *pw, const char *uname)
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{
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const struct pwdb_entry *pwe = NULL;
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time_t curdays;
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int last_change, max_change;
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int retval;
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D(("called."));
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/* Now start the checks */
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curdays = time(NULL)/(60*60*24); /* today */
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/* First: has account expired ? (CG)
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* - expire < curdays
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* - or (last_change + max_change + defer_change) < curdays
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* - in both cases, deny access
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*/
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D(("pwdb_get_entry"));
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retval = pwdb_get_entry(pw, "expire", &pwe);
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if (retval == PWDB_SUCCESS) {
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int expire;
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expire = *( (const int *) pwe->value );
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(void) pwdb_entry_delete(&pwe); /* no longer needed */
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if ((curdays > expire) && (expire > 0)) {
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_log_err(LOG_NOTICE
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, "acct: account %s has expired (account expired)"
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, uname);
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make_remark(pamh, ctrl, PAM_ERROR_MSG
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, "Your account has expired; "
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"please contact your system administrator");
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D(("account expired"));
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return PAM_ACCT_EXPIRED;
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}
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}
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D(("pwdb_get_entry"));
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retval = pwdb_get_entry(pw, "last_change", &pwe);
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if ( retval == PWDB_SUCCESS ) {
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last_change = *( (const int *) pwe->value );
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} else {
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last_change = curdays;
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}
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(void) pwdb_entry_delete(&pwe);
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D(("pwdb_get_entry"));
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retval = pwdb_get_entry(pw, "max_change", &pwe);
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if ( retval == PWDB_SUCCESS ) {
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max_change = *( (const int *) pwe->value );
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} else {
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max_change = -1;
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}
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(void) pwdb_entry_delete(&pwe);
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D(("pwdb_get_entry"));
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retval = pwdb_get_entry(pw, "defer_change", &pwe);
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if (retval == PWDB_SUCCESS) {
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int defer_change;
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defer_change = *( (const int *) pwe->value );
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(void) pwdb_entry_delete(&pwe);
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if ((curdays > (last_change + max_change + defer_change))
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&& (max_change != -1) && (defer_change != -1)
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&& (last_change > 0)) {
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if ( on(UNIX_DEBUG, ctrl) ) {
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_log_err(LOG_NOTICE, "acct: account %s has expired "
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"(failed to change password)", uname);
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}
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make_remark(pamh, ctrl, PAM_ERROR_MSG
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, "Your password has expired; "
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"please see your system administrator");
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D(("account expired2"));
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return PAM_ACCT_EXPIRED;
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}
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}
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/* Now test if the password is expired, but the user still can
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* change their password. (CG)
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* - last_change = 0
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* - last_change + max_change < curdays
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*/
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D(("when was the last change"));
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if (last_change == 0) {
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if ( on(UNIX_DEBUG, ctrl) ) {
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_log_err(LOG_NOTICE
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, "acct: expired password for user %s (root enforced)"
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, uname);
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}
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make_remark(pamh, ctrl, PAM_ERROR_MSG
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, "You are required to change your password immediately"
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);
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D(("need a new password"));
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return PAM_NEW_AUTHTOK_REQD;
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}
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if (((last_change + max_change) < curdays) &&
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(max_change < 99999) && (max_change > 0)) {
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if ( on(UNIX_DEBUG, ctrl) ) {
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_log_err(LOG_DEBUG
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, "acct: expired password for user %s (password aged)"
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, uname);
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}
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make_remark(pamh, ctrl, PAM_ERROR_MSG
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, "Your password has expired; please change it!");
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D(("need a new password 2"));
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return PAM_NEW_AUTHTOK_REQD;
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}
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/*
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* Now test if the password is about to expire (CG)
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* - last_change + max_change - curdays <= warn_change
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*/
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retval = pwdb_get_entry(pw, "warn_change", &pwe);
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if ( retval == PWDB_SUCCESS ) {
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int warn_days, daysleft;
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daysleft = last_change + max_change - curdays;
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warn_days = *((const int *) pwe->value);
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(void) pwdb_entry_delete(&pwe);
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if ((daysleft <= warn_days) && (warn_days > 0)) {
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char *s;
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if ( on(UNIX_DEBUG, ctrl) ) {
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_log_err(LOG_DEBUG
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, "acct: password for user %s will expire in %d days"
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, uname, daysleft);
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}
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#define LocalComment "Warning: your password will expire in %d day%s"
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if ((s = (char *) malloc(30+sizeof(LocalComment))) == NULL) {
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_log_err(LOG_CRIT, "malloc failure in " __FILE__);
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retval = PAM_BUF_ERR;
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} else {
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sprintf(s, LocalComment, daysleft, daysleft == 1 ? "":"s");
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make_remark(pamh, ctrl, PAM_TEXT_INFO, s);
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free(s);
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}
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#undef LocalComment
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}
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} else {
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retval = PAM_SUCCESS;
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}
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D(("all done"));
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return retval;
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}
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/*
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* this function checks for the account details. The user may not be
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* permitted to log in at this time etc.. Within the context of
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* vanilla Unix, this function simply does nothing. The shadow suite
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* added password/account expiry, but PWDB takes care of this
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* transparently.
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*/
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static int _unix_acct_mgmt(pam_handle_t *pamh, unsigned int ctrl)
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{
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const struct pwdb *pw = NULL;
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char *uname=NULL;
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int retval;
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D(("called."));
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/* identify user */
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retval = pam_get_item(pamh,PAM_USER,(const void **)&uname);
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D(("user = `%s'", uname));
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if (retval != PAM_SUCCESS || uname == NULL) {
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_log_err(LOG_ALERT
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, "acct; could not identify user (from uid=%d)"
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, getuid());
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return PAM_USER_UNKNOWN;
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}
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/* get database information for user */
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retval = pwdb_locate("user", PWDB_DEFAULT, uname, PWDB_ID_UNKNOWN, &pw);
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if (retval != PWDB_SUCCESS || pw == NULL) {
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_log_err(LOG_ALERT, "acct; %s (%s from uid=%d)"
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, pwdb_strerror(retval), uname, getuid());
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if ( pw ) {
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(void) pwdb_delete(&pw);
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}
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return PAM_USER_UNKNOWN;
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}
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/* now check the user's times etc.. */
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retval = _shadow_acct_mgmt_exp(pamh, ctrl, pw, uname);
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if (retval != PAM_SUCCESS) {
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_log_err(LOG_NOTICE, "expiry check failed for '%s'", uname);
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}
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/* Done with pw */
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(void) pwdb_delete(&pw);
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/* all done */
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D(("done."));
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return retval;
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}
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/*
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* Copyright (c) Elliot Lee, 1996.
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* Copyright (c) Andrew Morgan <morgan@parc.power.net> 1996.
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* Copyright (c) Cristian Gafton <gafton@redhat.com> 1996.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, and the entire permission notice in its entirety,
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* including the disclaimer of warranties.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* ALTERNATIVELY, this product may be distributed under the terms of
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* the GNU Public License, in which case the provisions of the GPL are
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* required INSTEAD OF the above restrictions. (This clause is
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* necessary due to a potential bad interaction between the GPL and
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* the restrictions contained in a BSD-style copyright.)
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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