#define PAM_SM_AUTH
#include "includes.h"
#include "debug.h"
#ifndef LINUX
#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
#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"
#define AUTH_RETURN \
do { \
\
CatchSignal(SIGPIPE, SIGNAL_CAST oldsig_handler); \
if(ret_data) { \
*ret_data = retval; \
pam_set_data( pamh, "smb_setcred_return" \
, (void *) ret_data, NULL ); \
} \
return retval; \
} while (0)
static int _smb_add_user(pam_handle_t *pamh, unsigned int ctrl,
const char *name, struct samu *sampass, BOOL exist);
#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;
extern BOOL in_client;
const char *name;
void (*oldsig_handler)(int) = NULL;
BOOL found;
char *p = NULL;
load_case_tables();
setup_logging("pam_smbpass",False);
in_client = True;
ctrl = set_ctrl(flags, argc, argv);
ret_data = SMB_MALLOC_P(int);
oldsig_handler = CatchSignal(SIGPIPE, SIGNAL_CAST SIG_IGN);
retval = pam_get_user( pamh, &name, "Username: " );
if ( retval != PAM_SUCCESS ) {
if (on( SMB_DEBUG, ctrl )) {
_log_err(LOG_DEBUG, "auth: could not identify user");
}
AUTH_RETURN;
}
if (on( SMB_DEBUG, ctrl )) {
_log_err( 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)) {
_log_err( LOG_ALERT, "Cannot access samba password database" );
retval = PAM_AUTHINFO_UNAVAIL;
AUTH_RETURN;
}
sampass = samu_new( NULL );
if (!sampass) {
_log_err( 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(LOG_ALERT, "Failed to find entry for user %s.", name);
retval = PAM_USER_UNKNOWN;
TALLOC_FREE(sampass);
sampass = NULL;
AUTH_RETURN;
}
if (_smb_blankpasswd( ctrl, sampass )) {
TALLOC_FREE(sampass);
retval = PAM_SUCCESS;
AUTH_RETURN;
}
retval = _smb_read_password(pamh, ctrl, NULL, "Password: ", NULL, _SMB_AUTHTOK, &p);
if (retval != PAM_SUCCESS ) {
_log_err(LOG_CRIT, "auth: no password provided for [%s]", name);
TALLOC_FREE(sampass);
AUTH_RETURN;
}
retval = _smb_verify_password( pamh, sampass, p, ctrl );
TALLOC_FREE(sampass);
p = NULL;
AUTH_RETURN;
}
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", (const void **) &pretval);
if(pretval) {
retval = *pretval;
SAFE_FREE(pretval);
}
pam_set_data(pamh, "smb_setcred_return", NULL, NULL);
return retval;
}
static int _smb_add_user(pam_handle_t *pamh, unsigned int ctrl,
const char *name, struct samu *sampass, BOOL exist)
{
pstring err_str;
pstring msg_str;
const char *pass = NULL;
int retval;
err_str[0] = '\0';
msg_str[0] = '\0';
retval = pam_get_item( pamh, PAM_AUTHTOK, (const void **) &pass );
if (retval != PAM_SUCCESS) {
_log_err( LOG_ALERT
, "pam_get_item returned error to pam_sm_authenticate" );
return PAM_AUTHTOK_RECOVER_ERR;
} else if (pass == NULL) {
return PAM_AUTHTOK_RECOVER_ERR;
}
if (!exist) {
retval = NT_STATUS_IS_OK(local_password_change( name, LOCAL_ADD_USER|LOCAL_SET_PASSWORD,
pass, err_str,
sizeof(err_str),
msg_str, sizeof(msg_str) ));
if (!retval && *err_str)
{
err_str[PSTRING_LEN-1] = '\0';
make_remark( pamh, ctrl, PAM_ERROR_MSG, err_str );
}
else if (*msg_str)
{
msg_str[PSTRING_LEN-1] = '\0';
make_remark( pamh, ctrl, PAM_TEXT_INFO, msg_str );
}
pass = NULL;
return PAM_IGNORE;
}
else {
if ( pdb_get_acct_ctrl(sampass) & ~ACB_PWNOTREQ )
{
retval = NT_STATUS_IS_OK(local_password_change( name, LOCAL_SET_PASSWORD, pass, err_str, sizeof(err_str),
msg_str, sizeof(msg_str) ));
if (!retval && *err_str)
{
err_str[PSTRING_LEN-1] = '\0';
make_remark( pamh, ctrl, PAM_ERROR_MSG, err_str );
}
else if (*msg_str)
{
msg_str[PSTRING_LEN-1] = '\0';
make_remark( pamh, ctrl, PAM_TEXT_INFO, msg_str );
}
}
}
pass = NULL;
return PAM_IGNORE;
}
#ifdef PAM_STATIC
struct pam_module _pam_smbpass_auth_modstruct = {
"pam_smbpass",
pam_sm_authenticate,
pam_sm_setcred,
NULL,
NULL,
NULL,
NULL
};
#endif