source3/pam_smbpass/pam_smb_acct.c

   1 /* Unix NT password database implementation, version 0.7.5.
   2  *
   3  * This program is free software; you can redistribute it and/or modify it under
   4  * the terms of the GNU General Public License as published by the Free
   5  * Software Foundation; either version 3 of the License, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, see <http://www.gnu.org/licenses/>.
  15 */
  16
  17 /* indicate the following groups are defined */
  18 #define PAM_SM_ACCT
  19
  20 #include "includes.h"
  21
  22 #ifndef LINUX
  23
  24 /* This is only used in the Sun implementation. */
  25 #if defined(HAVE_SECURITY_PAM_APPL_H)
  26 #include <security/pam_appl.h>
  27 #elif defined(HAVE_PAM_PAM_APPL_H)
  28 #include <pam/pam_appl.h>
  29 #endif
  30
  31 #endif  /* LINUX */
  32
  33 #if defined(HAVE_SECURITY_PAM_MODULES_H)
  34 #include <security/pam_modules.h>
  35 #elif defined(HAVE_PAM_PAM_MODULES_H)
  36 #include <pam/pam_modules.h>
  37 #endif
  38
  39 #include "general.h"
  40
  41 #include "support.h"
  42
  43
  44 /*
  45  * pam_sm_acct_mgmt() verifies whether or not the account is disabled.
  46  *
  47  */
  48
  49 int pam_sm_acct_mgmt( pam_handle_t *pamh, int flags,
  50                       int argc, const char **argv )
  51 {
  52         unsigned int ctrl;
  53         int retval;
  54
  55         const char *name;
  56         struct samu *sampass = NULL;
  57         void (*oldsig_handler)(int);
  58
  59         /* Samba initialization. */
  60         load_case_tables();
  61         lp_set_in_client(True);
  62
  63         ctrl = set_ctrl(pamh, flags, argc, argv );
  64
  65         /* get the username */
  66
  67         retval = pam_get_user( pamh, &name, "Username: " );
  68         if (retval != PAM_SUCCESS) {
  69                 if (on( SMB_DEBUG, ctrl )) {
  70                         _log_err(pamh, LOG_DEBUG, "acct: could not identify user" );
  71                 }
  72                 return retval;
  73         }
  74         if (on( SMB_DEBUG, ctrl )) {
  75                 _log_err(pamh, LOG_DEBUG, "acct: username [%s] obtained", name );
  76         }
  77
  78         if (geteuid() != 0) {
  79                 _log_err(pamh, LOG_DEBUG, "Cannot access samba password database, not running as root.");
  80                 return PAM_AUTHINFO_UNAVAIL;
  81         }
  82
  83         /* Getting into places that might use LDAP -- protect the app
  84                 from a SIGPIPE it's not expecting */
  85         oldsig_handler = CatchSignal(SIGPIPE, SIGNAL_CAST SIG_IGN);
  86         if (!initialize_password_db(True, NULL)) {
  87           _log_err(pamh, LOG_ALERT, "Cannot access samba password database" );
  88                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  89                 return PAM_AUTHINFO_UNAVAIL;
  90         }
  91
  92         /* Get the user's record. */
  93
  94         if (!(sampass = samu_new( NULL ))) {
  95                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  96                 /* malloc fail. */
  97                 return nt_status_to_pam(NT_STATUS_NO_MEMORY);
  98         }
  99
 100         if (!pdb_getsampwnam(sampass, name )) {
 101                 _log_err(pamh, LOG_DEBUG, "acct: could not identify user");
 102                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 103                 return PAM_USER_UNKNOWN;
 104         }
 105
 106         /* check for lookup failure */
 107         if (!strlen(pdb_get_username(sampass)) ) {
 108                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 109                 return PAM_USER_UNKNOWN;
 110         }
 111
 112         if (pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
 113                 if (on( SMB_DEBUG, ctrl )) {
 114                         _log_err(pamh, LOG_DEBUG,
 115                                  "acct: account %s is administratively disabled", name);
 116                 }
 117                 make_remark( pamh, ctrl, PAM_ERROR_MSG
 118                         , "Your account has been disabled; "
 119                         "please see your system administrator." );
 120
 121                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 122                 return PAM_ACCT_EXPIRED;
 123         }
 124
 125         /* TODO: support for expired passwords. */
 126
 127         CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 128         return PAM_SUCCESS;
 129 }
 130
 131 /* static module data */
 132 #ifdef PAM_STATIC
 133 struct pam_module _pam_smbpass_acct_modstruct = {
 134      "pam_smbpass",
 135      NULL,
 136      NULL,
 137      pam_sm_acct_mgmt,
 138      NULL,
 139      NULL,
 140      NULL
 141 };
 142 #endif
 143