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 )) != NULL ) {
  85         pdb_getsampwnam(sampass, name );
  86     }
  87
  88     /* check for lookup failure */
  89     if ( !sampass || !strlen(pdb_get_username(sampass)) ) {
  90         CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
  91         return PAM_USER_UNKNOWN;
  92     }
  93
  94     if (pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
  95         if (on( SMB_DEBUG, ctrl )) {
  96             _log_err( LOG_DEBUG
  97                       , "acct: account %s is administratively disabled", name );
  98         }
  99         make_remark( pamh, ctrl, PAM_ERROR_MSG
 100                      , "Your account has been disabled; "
 101                        "please see your system administrator." );
 102
 103         CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 104         return PAM_ACCT_EXPIRED;
 105     }
 106
 107     /* TODO: support for expired passwords. */
 108
 109     CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
 110     return PAM_SUCCESS;
 111 }
 112
 113 /* static module data */
 114 #ifdef PAM_STATIC
 115 struct pam_module _pam_smbpass_acct_modstruct = {
 116      "pam_smbpass",
 117      NULL,
 118      NULL,
 119      pam_sm_acct_mgmt,
 120      NULL,
 121      NULL,
 122      NULL
 123 };
 124 #endif
 125