| 1 | /* Unix NT password database implementation, version 0.7.5.
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| 2 | *
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| 3 | * This program is free software; you can redistribute it and/or modify it under
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| 4 | * the terms of the GNU General Public License as published by the Free
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| 5 | * Software Foundation; either version 3 of the License, or (at your option)
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| 6 | * any later version.
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| 7 | *
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| 8 | * This program is distributed in the hope that it will be useful, but WITHOUT
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| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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| 11 | * more details.
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| 12 | *
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| 13 | * You should have received a copy of the GNU General Public License along with
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| 14 | * this program; if not, see <http://www.gnu.org/licenses/>.
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| 15 | */
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| 16 |
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| 17 | /* indicate the following groups are defined */
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| 18 | #define PAM_SM_ACCT
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| 19 |
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| 20 | #include "includes.h"
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| 21 |
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| 22 | #ifndef LINUX
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| 23 |
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| 24 | /* This is only used in the Sun implementation. */
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| 25 | #if defined(HAVE_SECURITY_PAM_APPL_H)
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| 26 | #include <security/pam_appl.h>
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| 27 | #elif defined(HAVE_PAM_PAM_APPL_H)
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| 28 | #include <pam/pam_appl.h>
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| 29 | #endif
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| 30 |
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| 31 | #endif /* LINUX */
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| 32 |
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| 33 | #if defined(HAVE_SECURITY_PAM_MODULES_H)
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| 34 | #include <security/pam_modules.h>
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| 35 | #elif defined(HAVE_PAM_PAM_MODULES_H)
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| 36 | #include <pam/pam_modules.h>
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| 37 | #endif
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| 38 |
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| 39 | #include "general.h"
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| 40 |
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| 41 | #include "support.h"
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| 42 |
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| 43 |
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| 44 | /*
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| 45 | * pam_sm_acct_mgmt() verifies whether or not the account is disabled.
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| 46 | *
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| 47 | */
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| 48 |
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| 49 | int pam_sm_acct_mgmt( pam_handle_t *pamh, int flags,
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| 50 | int argc, const char **argv )
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| 51 | {
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| 52 | unsigned int ctrl;
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| 53 | int retval;
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| 54 |
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| 55 | const char *name;
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| 56 | struct samu *sampass = NULL;
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| 57 | void (*oldsig_handler)(int);
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| 58 |
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| 59 | /* Samba initialization. */
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| 60 | load_case_tables();
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| 61 | setup_logging( "pam_smbpass", False );
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| 62 | lp_set_in_client(True);
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| 63 |
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| 64 | ctrl = set_ctrl( flags, argc, argv );
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| 65 |
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| 66 | /* get the username */
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| 67 |
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| 68 | retval = pam_get_user( pamh, &name, "Username: " );
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| 69 | if (retval != PAM_SUCCESS) {
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| 70 | if (on( SMB_DEBUG, ctrl )) {
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| 71 | _log_err( LOG_DEBUG, "acct: could not identify user" );
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| 72 | }
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| 73 | return retval;
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| 74 | }
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| 75 | if (on( SMB_DEBUG, ctrl )) {
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| 76 | _log_err( LOG_DEBUG, "acct: username [%s] obtained", name );
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| 77 | }
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| 78 |
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| 79 | if (geteuid() != 0) {
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| 80 | _log_err( LOG_DEBUG, "Cannot access samba password database, not running as root.");
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| 81 | return PAM_AUTHINFO_UNAVAIL;
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| 82 | }
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| 83 |
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| 84 | /* Getting into places that might use LDAP -- protect the app
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| 85 | from a SIGPIPE it's not expecting */
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| 86 | oldsig_handler = CatchSignal(SIGPIPE, SIGNAL_CAST SIG_IGN);
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| 87 | if (!initialize_password_db(True, NULL)) {
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| 88 | _log_err( LOG_ALERT, "Cannot access samba password database" );
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| 89 | CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
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| 90 | return PAM_AUTHINFO_UNAVAIL;
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| 91 | }
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| 92 |
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| 93 | /* Get the user's record. */
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| 94 |
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| 95 | if (!(sampass = samu_new( NULL ))) {
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| 96 | CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
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| 97 | /* malloc fail. */
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| 98 | return nt_status_to_pam(NT_STATUS_NO_MEMORY);
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| 99 | }
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| 100 |
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| 101 | if (!pdb_getsampwnam(sampass, name )) {
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| 102 | _log_err( LOG_DEBUG, "acct: could not identify user" );
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| 103 | CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
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| 104 | return PAM_USER_UNKNOWN;
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| 105 | }
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| 106 |
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| 107 | /* check for lookup failure */
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| 108 | if (!strlen(pdb_get_username(sampass)) ) {
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| 109 | CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
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| 110 | return PAM_USER_UNKNOWN;
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| 111 | }
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| 112 |
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| 113 | if (pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
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| 114 | if (on( SMB_DEBUG, ctrl )) {
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| 115 | _log_err( LOG_DEBUG
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| 116 | , "acct: account %s is administratively disabled", name );
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| 117 | }
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| 118 | make_remark( pamh, ctrl, PAM_ERROR_MSG
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| 119 | , "Your account has been disabled; "
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| 120 | "please see your system administrator." );
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| 121 |
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| 122 | CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
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| 123 | return PAM_ACCT_EXPIRED;
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| 124 | }
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| 125 |
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| 126 | /* TODO: support for expired passwords. */
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| 127 |
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| 128 | CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler);
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| 129 | return PAM_SUCCESS;
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| 130 | }
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| 131 |
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| 132 | /* static module data */
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| 133 | #ifdef PAM_STATIC
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| 134 | struct pam_module _pam_smbpass_acct_modstruct = {
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| 135 | "pam_smbpass",
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| 136 | NULL,
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| 137 | NULL,
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| 138 | pam_sm_acct_mgmt,
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| 139 | NULL,
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| 140 | NULL,
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| 141 | NULL
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| 142 | };
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| 143 | #endif
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| 144 |
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