release/src/router/samba3/source/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         struct samu *sampass = NULL;
  50         void (*oldsig_handler)(int);
  51         extern BOOL in_client;
  52
  53         /* Samba initialization. */
  54         load_case_tables();
  55         setup_logging( "pam_smbpass", False );
  56         in_client = True;
  57
  58         ctrl = set_ctrl( flags, argc, argv );
  59
  60         /* get the username */
  61
  62         retval = pam_get_user( pamh, &name, "Username: " );
  63         if (retval != PAM_SUCCESS) {
  64                 if (on( SMB_DEBUG, ctrl )) {
  65                         _log_err( LOG_DEBUG, "acct: could not identify user" );
  66                 }
  67                 return retval;
  68         }
  69         if (on( SMB_DEBUG, ctrl )) {
  70                 _log_err( LOG_DEBUG, "acct: username [%s] obtained", name );
  71         }
  72
  73         /* Getting into places that might use LDAP -- protect the app
  74                 from a SIGPIPE it's not expecting */
  75         oldsig_handler = CatchSignal(SIGPIPE, SIGNAL_CAST SIG_IGN);
  76         if (!initialize_password_db(True)) {
  77                 _log_err( LOG_ALERT, "Cannot access samba password database" );
  78                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  79                 return PAM_AUTHINFO_UNAVAIL;
  80         }
  81
  82         /* Get the user's record. */
  83
  84         if (!(sampass = samu_new( NULL ))) {
  85                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  86                 /* malloc fail. */
  87                 return nt_status_to_pam(NT_STATUS_NO_MEMORY);
  88         }
  89
  90         if (!pdb_getsampwnam(sampass, name )) {
  91                 _log_err( LOG_DEBUG, "acct: could not identify user" );
  92                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  93                 return PAM_USER_UNKNOWN;
  94         }
  95
  96         /* check for lookup failure */
  97         if (!strlen(pdb_get_username(sampass)) ) {
  98                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  99                 return PAM_USER_UNKNOWN;
 100         }
 101
 102         if (pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
 103                 if (on( SMB_DEBUG, ctrl )) {
 104                         _log_err( LOG_DEBUG
 105                                 , "acct: account %s is administratively disabled", name );
 106                 }
 107                 make_remark( pamh, ctrl, PAM_ERROR_MSG
 108                         , "Your account has been disabled; "
 109                         "please see your system administrator." );
 110
 111                 CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 112                 return PAM_ACCT_EXPIRED;
 113         }
 114
 115         /* TODO: support for expired passwords. */
 116
 117         CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 118         return PAM_SUCCESS;
 119 }
 120
 121 /* static module data */
 122 #ifdef PAM_STATIC
 123 struct pam_module _pam_smbpass_acct_modstruct = {
 124      "pam_smbpass",
 125      NULL,
 126      NULL,
 127      pam_sm_acct_mgmt,
 128      NULL,
 129      NULL,
 130      NULL
 131 };
 132 #endif
 133