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 2 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, write to the Free Software Foundation, Inc., 675
  15  * Mass Ave, Cambridge, MA 02139, USA.
  16 */
  17
  18 /* indicate the following groups are defined */
  19 #define PAM_SM_ACCT
  20
  21 #include "includes.h"
  22
  23 #ifndef LINUX
  24
  25 /* This is only used in the Sun implementation. */
  26 #include <security/pam_appl.h>
  27
  28 #endif  /* LINUX */
  29
  30 #include <security/pam_modules.h>
  31
  32 #include "general.h"
  33
  34 #include "support.h"
  35
  36
  37 /*
  38  * pam_sm_acct_mgmt() verifies whether or not the account is disabled.
  39  *
  40  */
  41
  42 int pam_sm_acct_mgmt( pam_handle_t *pamh, int flags,
  43                       int argc, const char **argv )
  44 {
  45     unsigned int ctrl;
  46     int retval;
  47
  48     const char *name;
  49     SAM_ACCOUNT *sampass = NULL;
  50     void (*oldsig_handler)(int);
  51     extern BOOL in_client;
  52
  53     /* Samba initialization. */
  54     setup_logging( "pam_smbpass", False );
  55     in_client = True;
  56
  57     ctrl = set_ctrl( flags, argc, argv );
  58
  59     /* get the username */
  60
  61     retval = pam_get_user( pamh, &name, "Username: " );
  62     if (retval != PAM_SUCCESS) {
  63         if (on( SMB_DEBUG, ctrl )) {
  64             _log_err( LOG_DEBUG, "acct: could not identify user" );
  65         }
  66         return retval;
  67     }
  68     if (on( SMB_DEBUG, ctrl )) {
  69         _log_err( LOG_DEBUG, "acct: username [%s] obtained", name );
  70     }
  71
  72     /* Getting into places that might use LDAP -- protect the app
  73        from a SIGPIPE it's not expecting */
  74     oldsig_handler = CatchSignal(SIGPIPE, SIGNAL_CAST SIG_IGN);
  75     if (!initialize_password_db(True)) {
  76         _log_err( LOG_ALERT, "Cannot access samba password database" );
  77         CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  78         return PAM_AUTHINFO_UNAVAIL;
  79     }
  80
  81     /* Get the user's record. */
  82     pdb_init_sam(&sampass);
  83     pdb_getsampwnam(sampass, name );
  84
  85     if (!sampass) {
  86         CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  87         return PAM_USER_UNKNOWN;
  88     }
  89
  90     if (pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
  91         if (on( SMB_DEBUG, ctrl )) {
  92             _log_err( LOG_DEBUG
  93                       , "acct: account %s is administratively disabled", name );
  94         }
  95         make_remark( pamh, ctrl, PAM_ERROR_MSG
  96                      , "Your account has been disabled; "
  97                        "please see your system administrator." );
  98
  99         CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 100         return PAM_ACCT_EXPIRED;
 101     }
 102
 103     /* TODO: support for expired passwords. */
 104
 105     CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 106     return PAM_SUCCESS;
 107 }
 108
 109 /* static module data */
 110 #ifdef PAM_STATIC
 111 struct pam_module _pam_smbpass_acct_modstruct = {
 112      "pam_smbpass",
 113      NULL,
 114      NULL,
 115      pam_sm_acct_mgmt,
 116      NULL,
 117      NULL,
 118      NULL
 119 };
 120 #endif
 121