+++ /dev/null
-/* Unix NT password database implementation, version 0.7.5.
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 3 of the License, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, see <http://www.gnu.org/licenses/>.
-*/
-
-/* indicate the following groups are defined */
-#define PAM_SM_AUTH
-
-#include "includes.h"
-#include "lib/util/debug.h"
-
-#ifndef LINUX
-
-/* This is only used in the Sun implementation. */
-#if defined(HAVE_SECURITY_PAM_APPL_H)
-#include <security/pam_appl.h>
-#elif defined(HAVE_PAM_PAM_APPL_H)
-#include <pam/pam_appl.h>
-#endif
-
-#endif /* LINUX */
-
-#if defined(HAVE_SECURITY_PAM_MODULES_H)
-#include <security/pam_modules.h>
-#elif defined(HAVE_PAM_PAM_MODULES_H)
-#include <pam/pam_modules.h>
-#endif
-
-#include "general.h"
-
-#include "support.h"
-
-static void ret_data_cleanup(pam_handle_t *pamh, void *data, int error_status)
-{
- free(data);
-}
-
-#define AUTH_RETURN \
-do { \
- /* Restore application signal handler */ \
- CatchSignal(SIGPIPE, oldsig_handler); \
- if(ret_data) { \
- *ret_data = retval; \
- pam_set_data(pamh, \
- "smb_setcred_return", \
- (void *)ret_data, \
- ret_data_cleanup); \
- } \
- TALLOC_FREE(frame); \
- return retval; \
-} while (0)
-
-static int _smb_add_user(pam_handle_t *pamh, unsigned int ctrl,
- const char *name, struct samu *sampass, bool exist);
-
-
-/*
- * pam_sm_authenticate() authenticates users against the samba password file.
- *
- * First, obtain the password from the user. Then use a
- * routine in 'support.c' to authenticate the user.
- */
-
-#define _SMB_AUTHTOK "-SMB-PASS"
-
-int pam_sm_authenticate(pam_handle_t *pamh, int flags,
- int argc, const char **argv)
-{
- unsigned int ctrl;
- int retval, *ret_data = NULL;
- struct samu *sampass = NULL;
- const char *name;
- void (*oldsig_handler)(int) = NULL;
- bool found;
- TALLOC_CTX *frame = talloc_stackframe();
-
- /* Points to memory managed by the PAM library. Do not free. */
- char *p = NULL;
-
- /* Samba initialization. */
- load_case_tables_library();
-
- ctrl = set_ctrl(pamh, flags, argc, argv);
-
- /* Get a few bytes so we can pass our return value to
- pam_sm_setcred(). */
- ret_data = SMB_MALLOC_P(int);
-
- /* we need to do this before we call AUTH_RETURN */
- /* Getting into places that might use LDAP -- protect the app
- from a SIGPIPE it's not expecting */
- oldsig_handler = CatchSignal(SIGPIPE, SIG_IGN);
-
- /* get the username */
- retval = pam_get_user( pamh, &name, "Username: " );
- if ( retval != PAM_SUCCESS ) {
- if (on( SMB_DEBUG, ctrl )) {
- _log_err(pamh, LOG_DEBUG, "auth: could not identify user");
- }
- AUTH_RETURN;
- }
- if (on( SMB_DEBUG, ctrl )) {
- _log_err(pamh, LOG_DEBUG, "username [%s] obtained", name );
- }
-
- if (geteuid() != 0) {
- _log_err(pamh, LOG_DEBUG, "Cannot access samba password database, not running as root.");
- retval = PAM_AUTHINFO_UNAVAIL;
- AUTH_RETURN;
- }
-
- if (!initialize_password_db(True, NULL)) {
- _log_err(pamh, LOG_ALERT, "Cannot access samba password database" );
- retval = PAM_AUTHINFO_UNAVAIL;
- AUTH_RETURN;
- }
-
- sampass = samu_new( NULL );
- if (!sampass) {
- _log_err(pamh, LOG_ALERT, "Cannot talloc a samu struct" );
- retval = nt_status_to_pam(NT_STATUS_NO_MEMORY);
- AUTH_RETURN;
- }
-
- found = pdb_getsampwnam( sampass, name );
-
- if (on( SMB_MIGRATE, ctrl )) {
- retval = _smb_add_user(pamh, ctrl, name, sampass, found);
- TALLOC_FREE(sampass);
- AUTH_RETURN;
- }
-
- if (!found) {
- _log_err(pamh, LOG_ALERT, "Failed to find entry for user %s.", name);
- retval = PAM_USER_UNKNOWN;
- TALLOC_FREE(sampass);
- sampass = NULL;
- AUTH_RETURN;
- }
-
- /* if this user does not have a password... */
-
- if (_smb_blankpasswd( ctrl, sampass )) {
- TALLOC_FREE(sampass);
- retval = PAM_SUCCESS;
- AUTH_RETURN;
- }
-
- /* get this user's authentication token */
-
- retval = _smb_read_password(pamh, ctrl, NULL, "Password: ", NULL, _SMB_AUTHTOK, &p);
- if (retval != PAM_SUCCESS ) {
- _log_err(pamh,LOG_CRIT, "auth: no password provided for [%s]", name);
- TALLOC_FREE(sampass);
- AUTH_RETURN;
- }
-
- /* verify the password of this user */
-
- retval = _smb_verify_password( pamh, sampass, p, ctrl );
- TALLOC_FREE(sampass);
- p = NULL;
- AUTH_RETURN;
-}
-
-/*
- * This function is for setting samba credentials. If anyone comes up
- * with any credentials they think should be set, let me know.
- */
-
-int pam_sm_setcred(pam_handle_t *pamh, int flags,
- int argc, const char **argv)
-{
- int retval, *pretval = NULL;
-
- retval = PAM_SUCCESS;
-
- _pam_get_data(pamh, "smb_setcred_return", &pretval);
- if(pretval) {
- retval = *pretval;
- SAFE_FREE(pretval);
- }
- pam_set_data(pamh, "smb_setcred_return", NULL, NULL);
-
- return retval;
-}
-
-/* Helper function for adding a user to the db. */
-static int _smb_add_user(pam_handle_t *pamh, unsigned int ctrl,
- const char *name, struct samu *sampass, bool exist)
-{
- char *err_str = NULL;
- char *msg_str = NULL;
- const char *pass = NULL;
- int retval;
- TALLOC_CTX *frame = talloc_stackframe();
-
- /* Get the authtok; if we don't have one, silently fail. */
- retval = _pam_get_item( pamh, PAM_AUTHTOK, &pass );
-
- if (retval != PAM_SUCCESS) {
- _log_err(pamh, LOG_ALERT
- , "pam_get_item returned error to pam_sm_authenticate" );
- TALLOC_FREE(frame);
- return PAM_AUTHTOK_RECOVER_ERR;
- }
-
- /* Add the user to the db if they aren't already there. */
- if (!exist) {
- retval = NT_STATUS_IS_OK(local_password_change(name, LOCAL_ADD_USER|LOCAL_SET_PASSWORD,
- pass, &err_str, &msg_str));
- if (!retval && err_str) {
- make_remark(pamh, ctrl, PAM_ERROR_MSG, err_str );
- } else if (msg_str) {
- make_remark(pamh, ctrl, PAM_TEXT_INFO, msg_str );
- }
- pass = NULL;
-
- SAFE_FREE(err_str);
- SAFE_FREE(msg_str);
- TALLOC_FREE(frame);
- return PAM_IGNORE;
- } else {
- /* mimick 'update encrypted' as long as the 'no pw req' flag is not set */
- if ( pdb_get_acct_ctrl(sampass) & ~ACB_PWNOTREQ ) {
- retval = NT_STATUS_IS_OK(local_password_change(name, LOCAL_SET_PASSWORD,
- pass, &err_str, &msg_str));
- if (!retval && err_str) {
- make_remark(pamh, ctrl, PAM_ERROR_MSG, err_str );
- } else if (msg_str) {
- make_remark(pamh, ctrl, PAM_TEXT_INFO, msg_str );
- }
- }
- }
-
- SAFE_FREE(err_str);
- SAFE_FREE(msg_str);
- pass = NULL;
- TALLOC_FREE(frame);
- return PAM_IGNORE;
-}
-
-/* static module data */
-#ifdef PAM_STATIC
-struct pam_module _pam_smbpass_auth_modstruct = {
- "pam_smbpass",
- pam_sm_authenticate,
- pam_sm_setcred,
- NULL,
- NULL,
- NULL,
- NULL
-};
-#endif
git.samba.org / samba.git / blobdiff