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|
/* pam_winbind module
Copyright Andrew Tridgell <tridge@samba.org> 2000
Copyright Tim Potter <tpot@samba.org> 2000
Copyright Andrew Bartlett <abartlet@samba.org> 2002
Copyright Guenther Deschner <gd@samba.org> 2005-2007
largely based on pam_userdb by Cristian Gafton <gafton@redhat.com>
also contains large slabs of code from pam_unix by Elliot Lee <sopwith@redhat.com>
(see copyright below for full details)
*/
#include "pam_winbind.h"
#define _PAM_LOG_FUNCTION_ENTER(function, pamh, ctrl, flags) \
do { \
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] ENTER: " function " (flags: 0x%04x)", (uint32) pamh, flags); \
_pam_log_state(pamh, ctrl); \
} while (0)
#define _PAM_LOG_FUNCTION_LEAVE(function, pamh, ctrl, retval) \
do { \
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] LEAVE: " function " returning %d", (uint32) pamh, retval); \
_pam_log_state(pamh, ctrl); \
} while (0)
/* data tokens */
#define MAX_PASSWD_TRIES 3
/*
* Work around the pam API that has functions with void ** as parameters.
* These lead to strict aliasing warnings with gcc.
*/
static int _pam_get_item(const pam_handle_t *pamh, int item_type,
const void *_item)
{
const void **item = (const void **)_item;
return pam_get_item(pamh, item_type, item);
}
static int _pam_get_data(const pam_handle_t *pamh,
const char *module_data_name, const void *_data)
{
const void **data = (const void **)_data;
return pam_get_data(pamh, module_data_name, data);
}
/* some syslogging */
#ifdef HAVE_PAM_VSYSLOG
static void _pam_log_int(const pam_handle_t *pamh, int err, const char *format, va_list args)
{
pam_vsyslog(pamh, err, format, args);
}
#else
static void _pam_log_int(const pam_handle_t *pamh, int err, const char *format, va_list args)
{
char *format2 = NULL;
const char *service;
_pam_get_item(pamh, PAM_SERVICE, &service);
format2 = malloc(strlen(MODULE_NAME)+strlen(format)+strlen(service)+5);
if (format2 == NULL) {
/* what else todo ? */
vsyslog(err, format, args);
return;
}
sprintf(format2, "%s(%s): %s", MODULE_NAME, service, format);
vsyslog(err, format2, args);
SAFE_FREE(format2);
}
#endif /* HAVE_PAM_VSYSLOG */
static BOOL _pam_log_is_silent(int ctrl)
{
return on(ctrl, WINBIND_SILENT);
}
static void _pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
static void _pam_log(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
{
va_list args;
if (_pam_log_is_silent(ctrl)) {
return;
}
va_start(args, format);
_pam_log_int(pamh, err, format, args);
va_end(args);
}
static BOOL _pam_log_is_debug_enabled(int ctrl)
{
if (ctrl == -1) {
return False;
}
if (_pam_log_is_silent(ctrl)) {
return False;
}
if (!(ctrl & WINBIND_DEBUG_ARG)) {
return False;
}
return True;
}
static BOOL _pam_log_is_debug_state_enabled(int ctrl)
{
if (!(ctrl & WINBIND_DEBUG_STATE)) {
return False;
}
return _pam_log_is_debug_enabled(ctrl);
}
static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
static void _pam_log_debug(const pam_handle_t *pamh, int ctrl, int err, const char *format, ...)
{
va_list args;
if (!_pam_log_is_debug_enabled(ctrl)) {
return;
}
va_start(args, format);
_pam_log_int(pamh, err, format, args);
va_end(args);
}
static void _pam_log_state_datum(const pam_handle_t *pamh, int ctrl, int item_type, const char *key, int is_string)
{
const void *data = NULL;
if (item_type != 0) {
pam_get_item(pamh, item_type, &data);
} else {
pam_get_data(pamh, key, &data);
}
if (data != NULL) {
const char *type = (item_type != 0) ? "ITEM" : "DATA";
if (is_string != 0) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] STATE: %s(%s) = \"%s\" (0x%08x)", (uint32) pamh, type, key, (const char *) data, (uint32) data);
} else {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] STATE: %s(%s) = 0x%08x", (uint32) pamh, type, key, (uint32) data);
}
}
}
#define _PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, module_data_name) \
_pam_log_state_datum(pamh, ctrl, 0, module_data_name, 0)
#define _PAM_LOG_STATE_DATA_STRING(pamh, ctrl, module_data_name) \
_pam_log_state_datum(pamh, ctrl, 0, module_data_name, 1)
#define _PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, item_type) \
_pam_log_state_datum(pamh, ctrl, item_type, #item_type, 0)
#define _PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, item_type) \
_pam_log_state_datum(pamh, ctrl, item_type, #item_type, 1)
#ifdef DEBUG_PASSWORD
#define _LOG_PASSWORD_AS_STRING 1
#else
#define _LOG_PASSWORD_AS_STRING 0
#endif
#define _PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, item_type) \
_pam_log_state_datum(pamh, ctrl, item_type, #item_type, _LOG_PASSWORD_AS_STRING)
static void _pam_log_state(const pam_handle_t *pamh, int ctrl)
{
if (!_pam_log_is_debug_state_enabled(ctrl)) {
return;
}
_PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_SERVICE);
_PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_USER);
_PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_TTY);
_PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_RHOST);
_PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_RUSER);
_PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, PAM_OLDAUTHTOK);
_PAM_LOG_STATE_ITEM_PASSWORD(pamh, ctrl, PAM_AUTHTOK);
_PAM_LOG_STATE_ITEM_STRING(pamh, ctrl, PAM_USER_PROMPT);
_PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_CONV);
#ifdef PAM_FAIL_DELAY
_PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_FAIL_DELAY);
#endif
#ifdef PAM_REPOSITORY
_PAM_LOG_STATE_ITEM_POINTER(pamh, ctrl, PAM_REPOSITORY);
#endif
_PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_HOMEDIR);
_PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_LOGONSCRIPT);
_PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_LOGONSERVER);
_PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_PROFILEPATH);
_PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_NEW_AUTHTOK_REQD); /* Use atoi to get PAM result code */
_PAM_LOG_STATE_DATA_STRING(pamh, ctrl, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH);
_PAM_LOG_STATE_DATA_POINTER(pamh, ctrl, PAM_WINBIND_PWD_LAST_SET);
}
static int _pam_parse(const pam_handle_t *pamh, int flags, int argc, const char **argv, dictionary **result_d)
{
int ctrl = 0;
const char *config_file = NULL;
int i;
const char **v;
dictionary *d = NULL;
if (flags & PAM_SILENT) {
ctrl |= WINBIND_SILENT;
}
for (i=argc,v=argv; i-- > 0; ++v) {
if (!strncasecmp(*v, "config", strlen("config"))) {
ctrl |= WINBIND_CONFIG_FILE;
config_file = v[i];
break;
}
}
if (config_file == NULL) {
config_file = PAM_WINBIND_CONFIG_FILE;
}
d = iniparser_load(config_file);
if (d == NULL) {
goto config_from_pam;
}
if (iniparser_getboolean(d, "global:debug", False)) {
ctrl |= WINBIND_DEBUG_ARG;
}
if (iniparser_getboolean(d, "global:debug_state", False)) {
ctrl |= WINBIND_DEBUG_STATE;
}
if (iniparser_getboolean(d, "global:cached_login", False)) {
ctrl |= WINBIND_CACHED_LOGIN;
}
if (iniparser_getboolean(d, "global:krb5_auth", False)) {
ctrl |= WINBIND_KRB5_AUTH;
}
if (iniparser_getboolean(d, "global:silent", False)) {
ctrl |= WINBIND_SILENT;
}
if (iniparser_getstr(d, "global:krb5_ccache_type") != NULL) {
ctrl |= WINBIND_KRB5_CCACHE_TYPE;
}
if ((iniparser_getstr(d, "global:require-membership-of") != NULL) ||
(iniparser_getstr(d, "global:require_membership_of") != NULL)) {
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
}
if (iniparser_getboolean(d, "global:try_first_pass", False)) {
ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
}
config_from_pam:
/* step through arguments */
for (i=argc,v=argv; i-- > 0; ++v) {
/* generic options */
if (!strcmp(*v,"debug"))
ctrl |= WINBIND_DEBUG_ARG;
else if (!strcasecmp(*v, "debug_state"))
ctrl |= WINBIND_DEBUG_STATE;
else if (!strcasecmp(*v, "use_authtok"))
ctrl |= WINBIND_USE_AUTHTOK_ARG;
else if (!strcasecmp(*v, "use_first_pass"))
ctrl |= WINBIND_USE_FIRST_PASS_ARG;
else if (!strcasecmp(*v, "try_first_pass"))
ctrl |= WINBIND_TRY_FIRST_PASS_ARG;
else if (!strcasecmp(*v, "unknown_ok"))
ctrl |= WINBIND_UNKNOWN_OK_ARG;
else if (!strncasecmp(*v, "require_membership_of", strlen("require_membership_of")))
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
else if (!strncasecmp(*v, "require-membership-of", strlen("require-membership-of")))
ctrl |= WINBIND_REQUIRED_MEMBERSHIP;
else if (!strcasecmp(*v, "krb5_auth"))
ctrl |= WINBIND_KRB5_AUTH;
else if (!strncasecmp(*v, "krb5_ccache_type", strlen("krb5_ccache_type")))
ctrl |= WINBIND_KRB5_CCACHE_TYPE;
else if (!strcasecmp(*v, "cached_login"))
ctrl |= WINBIND_CACHED_LOGIN;
else {
_pam_log(pamh, ctrl, LOG_ERR, "pam_parse: unknown option: %s", *v);
return -1;
}
}
if (result_d) {
*result_d = d;
} else {
if (d) {
iniparser_freedict(d);
}
}
return ctrl;
};
static void _pam_winbind_cleanup_func(pam_handle_t *pamh, void *data, int error_status)
{
int ctrl = _pam_parse(pamh, 0, 0, NULL, NULL);
if (_pam_log_is_debug_state_enabled(ctrl)) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "[pamh: 0x%08x] CLEAN: cleaning up PAM data 0x%08x (error_status = %d)", (uint32) pamh, (uint32) data, error_status);
}
SAFE_FREE(data);
}
static const struct ntstatus_errors {
const char *ntstatus_string;
const char *error_string;
} ntstatus_errors[] = {
{"NT_STATUS_OK", "Success"},
{"NT_STATUS_BACKUP_CONTROLLER", "No primary Domain Controler available"},
{"NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND", "No domain controllers found"},
{"NT_STATUS_NO_LOGON_SERVERS", "No logon servers"},
{"NT_STATUS_PWD_TOO_SHORT", "Password too short"},
{"NT_STATUS_PWD_TOO_RECENT", "The password of this user is too recent to change"},
{"NT_STATUS_PWD_HISTORY_CONFLICT", "Password is already in password history"},
{"NT_STATUS_PASSWORD_EXPIRED", "Your password has expired"},
{"NT_STATUS_PASSWORD_MUST_CHANGE", "You need to change your password now"},
{"NT_STATUS_INVALID_WORKSTATION", "You are not allowed to logon from this workstation"},
{"NT_STATUS_INVALID_LOGON_HOURS", "You are not allowed to logon at this time"},
{"NT_STATUS_ACCOUNT_EXPIRED", "Your account has expired. Please contact your System administrator"}, /* SCNR */
{"NT_STATUS_ACCOUNT_DISABLED", "Your account is disabled. Please contact your System administrator"}, /* SCNR */
{"NT_STATUS_ACCOUNT_LOCKED_OUT", "Your account has been locked. Please contact your System administrator"}, /* SCNR */
{"NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT", "Invalid Trust Account"},
{"NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT", "Invalid Trust Account"},
{"NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT", "Invalid Trust Account"},
{"NT_STATUS_ACCESS_DENIED", "Access is denied"},
{NULL, NULL}
};
const char *_get_ntstatus_error_string(const char *nt_status_string)
{
int i;
for (i=0; ntstatus_errors[i].ntstatus_string != NULL; i++) {
if (!strcasecmp(ntstatus_errors[i].ntstatus_string, nt_status_string)) {
return ntstatus_errors[i].error_string;
}
}
return NULL;
}
/* --- authentication management functions --- */
/* Attempt a conversation */
static int converse(pam_handle_t *pamh, int nargs,
struct pam_message **message,
struct pam_response **response)
{
int retval;
struct pam_conv *conv;
retval = _pam_get_item(pamh, PAM_CONV, &conv );
if (retval == PAM_SUCCESS) {
retval = conv->conv(nargs, (const struct pam_message **)message,
response, conv->appdata_ptr);
}
return retval; /* propagate error status */
}
static int _make_remark(pam_handle_t * pamh, int flags, int type, const char *text)
{
int retval = PAM_SUCCESS;
struct pam_message *pmsg[1], msg[1];
struct pam_response *resp;
if (flags & WINBIND_SILENT) {
return PAM_SUCCESS;
}
pmsg[0] = &msg[0];
msg[0].msg = CONST_DISCARD(char *, text);
msg[0].msg_style = type;
resp = NULL;
retval = converse(pamh, 1, pmsg, &resp);
if (resp) {
_pam_drop_reply(resp, 1);
}
return retval;
}
static int _make_remark_v(pam_handle_t * pamh, int flags, int type, const char *format, va_list args)
{
char *var;
int ret;
ret = vasprintf(&var, format, args);
if (ret < 0) {
_pam_log(pamh, 0, LOG_ERR, "memory allocation failure");
return ret;
}
ret = _make_remark(pamh, flags, type, var);
SAFE_FREE(var);
return ret;
}
static int _make_remark_format(pam_handle_t * pamh, int flags, int type, const char *format, ...) PRINTF_ATTRIBUTE(4,5);
static int _make_remark_format(pam_handle_t * pamh, int flags, int type, const char *format, ...)
{
int ret;
va_list args;
va_start(args, format);
ret = _make_remark_v(pamh, flags, type, format, args);
va_end(args);
return ret;
}
static int pam_winbind_request(pam_handle_t * pamh, int ctrl,
enum winbindd_cmd req_type,
struct winbindd_request *request,
struct winbindd_response *response)
{
/* Fill in request and send down pipe */
init_request(request, req_type);
if (write_sock(request, sizeof(*request), 0, 0) == -1) {
_pam_log(pamh, ctrl, LOG_ERR, "pam_winbind_request: write to socket failed!");
close_sock();
return PAM_SERVICE_ERR;
}
/* Wait for reply */
if (read_reply(response) == -1) {
_pam_log(pamh, ctrl, LOG_ERR, "pam_winbind_request: read from socket failed!");
close_sock();
return PAM_SERVICE_ERR;
}
/* We are done with the socket - close it and avoid mischeif */
close_sock();
/* Copy reply data from socket */
if (response->result == WINBINDD_OK) {
return PAM_SUCCESS;
}
/* no need to check for pam_error codes for getpwnam() */
switch (req_type) {
case WINBINDD_GETPWNAM:
case WINBINDD_LOOKUPNAME:
if (strlen(response->data.auth.nt_status_string) > 0) {
_pam_log(pamh, ctrl, LOG_ERR, "request failed, NT error was %s",
response->data.auth.nt_status_string);
} else {
_pam_log(pamh, ctrl, LOG_ERR, "request failed");
}
return PAM_USER_UNKNOWN;
default:
break;
}
if (response->data.auth.pam_error != PAM_SUCCESS) {
_pam_log(pamh, ctrl, LOG_ERR, "request failed: %s, PAM error was %s (%d), NT error was %s",
response->data.auth.error_string,
pam_strerror(pamh, response->data.auth.pam_error),
response->data.auth.pam_error,
response->data.auth.nt_status_string);
return response->data.auth.pam_error;
}
_pam_log(pamh, ctrl, LOG_ERR, "request failed, but PAM error 0!");
return PAM_SERVICE_ERR;
}
static int pam_winbind_request_log(pam_handle_t * pamh,
int ctrl,
enum winbindd_cmd req_type,
struct winbindd_request *request,
struct winbindd_response *response,
const char *user)
{
int retval;
retval = pam_winbind_request(pamh, ctrl, req_type, request, response);
switch (retval) {
case PAM_AUTH_ERR:
/* incorrect password */
_pam_log(pamh, ctrl, LOG_WARNING, "user '%s' denied access (incorrect password or invalid membership)", user);
return retval;
case PAM_ACCT_EXPIRED:
/* account expired */
_pam_log(pamh, ctrl, LOG_WARNING, "user '%s' account expired", user);
return retval;
case PAM_AUTHTOK_EXPIRED:
/* password expired */
_pam_log(pamh, ctrl, LOG_WARNING, "user '%s' password expired", user);
return retval;
case PAM_NEW_AUTHTOK_REQD:
/* new password required */
_pam_log(pamh, ctrl, LOG_WARNING, "user '%s' new password required", user);
return retval;
case PAM_USER_UNKNOWN:
/* the user does not exist */
_pam_log_debug(pamh, ctrl, LOG_NOTICE, "user '%s' not found", user);
if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
return PAM_IGNORE;
}
return retval;
case PAM_SUCCESS:
/* Otherwise, the authentication looked good */
switch (req_type) {
case WINBINDD_INFO:
break;
case WINBINDD_PAM_AUTH:
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", user);
break;
case WINBINDD_PAM_CHAUTHTOK:
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' password changed", user);
break;
default:
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' OK", user);
break;
}
return retval;
default:
/* we don't know anything about this return value */
_pam_log(pamh, ctrl, LOG_ERR, "internal module error (retval = %d, user = '%s')",
retval, user);
return retval;
}
}
/**
* send a password expiry message if required
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param next_change expected (calculated) next expiry date.
* @param already_expired pointer to a boolean to indicate if the password is
* already expired.
*
* @return boolean Returns True if message has been sent, False if not.
*/
static BOOL _pam_send_password_expiry_message(pam_handle_t *pamh, int ctrl, time_t next_change, time_t now, BOOL *already_expired)
{
int days = 0;
struct tm tm_now, tm_next_change;
if (already_expired) {
*already_expired = False;
}
if (next_change <= now) {
PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PASSWORD_EXPIRED");
if (already_expired) {
*already_expired = True;
}
return True;
}
if ((next_change < 0) ||
(next_change > now + DAYS_TO_WARN_BEFORE_PWD_EXPIRES * SECONDS_PER_DAY)) {
return False;
}
if ((localtime_r(&now, &tm_now) == NULL) ||
(localtime_r(&next_change, &tm_next_change) == NULL)) {
return False;
}
days = (tm_next_change.tm_yday+tm_next_change.tm_year*365) - (tm_now.tm_yday+tm_now.tm_year*365);
if (days == 0) {
_make_remark(pamh, ctrl, PAM_TEXT_INFO, "Your password expires today");
return True;
}
if (days > 0 && days < DAYS_TO_WARN_BEFORE_PWD_EXPIRES) {
_make_remark_format(pamh, ctrl, PAM_TEXT_INFO, "Your password will expire in %d %s",
days, (days > 1) ? "days":"day");
return True;
}
return False;
}
/**
* Send a warning if the password expires in the near future
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param response The full authentication response structure.
* @param already_expired boolean, is the pwd already expired?
*
* @return void.
*/
static void _pam_warn_password_expiry(pam_handle_t *pamh,
int flags,
const struct winbindd_response *response,
BOOL *already_expired)
{
time_t now = time(NULL);
time_t next_change = 0;
if (already_expired) {
*already_expired = False;
}
/* accounts with ACB_PWNOEXP set never receive a warning */
if (response->data.auth.info3.acct_flags & ACB_PWNOEXP) {
return;
}
/* no point in sending a warning if this is a grace logon */
if (PAM_WB_GRACE_LOGON(response->data.auth.info3.user_flgs)) {
return;
}
/* check if the info3 must change timestamp has been set */
next_change = response->data.auth.info3.pass_must_change_time;
if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
already_expired)) {
return;
}
/* now check for the global password policy */
/* good catch from Ralf Haferkamp: an expiry of "never" is translated
* to -1 */
if (response->data.auth.policy.expire <= 0) {
return;
}
next_change = response->data.auth.info3.pass_last_set_time +
response->data.auth.policy.expire;
if (_pam_send_password_expiry_message(pamh, flags, next_change, now,
already_expired)) {
return;
}
/* no warning sent */
}
#define IS_SID_STRING(name) (strncmp("S-", name, 2) == 0)
static BOOL safe_append_string(char *dest,
const char *src,
int dest_buffer_size)
/**
* Append a string, making sure not to overflow and to always return a NULL-terminated
* string.
*
* @param dest Destination string buffer (must already be NULL-terminated).
* @param src Source string buffer.
* @param dest_buffer_size Size of dest buffer in bytes.
*
* @return False if dest buffer is not big enough (no bytes copied), True on success.
*/
{
int dest_length = strlen(dest);
int src_length = strlen(src);
if ( dest_length + src_length + 1 > dest_buffer_size ) {
return False;
}
memcpy(dest + dest_length, src, src_length + 1);
return True;
}
static BOOL winbind_name_to_sid_string(pam_handle_t *pamh,
int ctrl,
const char *user,
const char *name,
char *sid_list_buffer,
int sid_list_buffer_size)
/**
* Convert a names into a SID string, appending it to a buffer.
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param user User in PAM request.
* @param name Name to convert.
* @param sid_list_buffer Where to append the string sid.
* @param sid_list_buffer Size of sid_list_buffer (in bytes).
*
* @return False on failure, True on success.
*/
{
const char* sid_string;
struct winbindd_response sid_response;
/* lookup name? */
if (IS_SID_STRING(name)) {
sid_string = name;
} else {
struct winbindd_request sid_request;
ZERO_STRUCT(sid_request);
ZERO_STRUCT(sid_response);
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "no sid given, looking up: %s\n", name);
/* fortunatly winbindd can handle non-separated names */
strncpy(sid_request.data.name.name, name,
sizeof(sid_request.data.name.name) - 1);
if (pam_winbind_request_log(pamh, ctrl, WINBINDD_LOOKUPNAME, &sid_request, &sid_response, user)) {
_pam_log(pamh, ctrl, LOG_INFO, "could not lookup name: %s\n", name);
return False;
}
sid_string = sid_response.data.sid.sid;
}
if (!safe_append_string(sid_list_buffer, sid_string, sid_list_buffer_size)) {
return False;
}
return True;
}
static BOOL winbind_name_list_to_sid_string_list(pam_handle_t *pamh,
int ctrl,
const char *user,
const char *name_list,
char *sid_list_buffer,
int sid_list_buffer_size)
/**
* Convert a list of names into a list of sids.
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param user User in PAM request.
* @param name_list List of names or string sids, separated by commas.
* @param sid_list_buffer Where to put the list of string sids.
* @param sid_list_buffer Size of sid_list_buffer (in bytes).
*
* @return False on failure, True on success.
*/
{
BOOL result = False;
char *current_name = NULL;
const char *search_location;
const char *comma;
if ( sid_list_buffer_size > 0 ) {
sid_list_buffer[0] = 0;
}
search_location = name_list;
while ( (comma = strstr(search_location, ",")) != NULL ) {
current_name = strndup(search_location, comma - search_location);
if (NULL == current_name) {
goto out;
}
if (!winbind_name_to_sid_string(pamh, ctrl, user, current_name, sid_list_buffer, sid_list_buffer_size)) {
goto out;
}
SAFE_FREE(current_name);
if (!safe_append_string(sid_list_buffer, ",", sid_list_buffer_size)) {
goto out;
}
search_location = comma + 1;
}
if (!winbind_name_to_sid_string(pamh, ctrl, user, search_location, sid_list_buffer, sid_list_buffer_size)) {
goto out;
}
result = True;
out:
SAFE_FREE(current_name);
return result;
}
/**
* put krb5ccname variable into environment
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param krb5ccname env variable retrieved from winbindd.
*
* @return void.
*/
static void _pam_setup_krb5_env(pam_handle_t *pamh, int ctrl, const char *krb5ccname)
{
char var[PATH_MAX];
int ret;
if (off(ctrl, WINBIND_KRB5_AUTH)) {
return;
}
if (!krb5ccname || (strlen(krb5ccname) == 0)) {
return;
}
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "request returned KRB5CCNAME: %s", krb5ccname);
if (snprintf(var, sizeof(var), "KRB5CCNAME=%s", krb5ccname) == -1) {
return;
}
ret = pam_putenv(pamh, var);
if (ret) {
_pam_log(pamh, ctrl, LOG_ERR, "failed to set KRB5CCNAME to %s: %s",
var, pam_strerror(pamh, ret));
}
}
/**
* Set string into the PAM stack.
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param data_name Key name for pam_set_data.
* @param value String value.
*
* @return void.
*/
static void _pam_set_data_string(pam_handle_t *pamh, int ctrl, const char *data_name, const char *value)
{
int ret;
if ( !data_name || !value || (strlen(data_name) == 0) || (strlen(value) == 0) ) {
return;
}
ret = pam_set_data(pamh, data_name, (void *)strdup(value), _pam_winbind_cleanup_func);
if (ret) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "Could not set data %s: %s\n",
data_name, pam_strerror(pamh, ret));
}
}
/**
* Set info3 strings into the PAM stack.
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param data_name Key name for pam_set_data.
* @param value String value.
*
* @return void.
*/
static void _pam_set_data_info3(pam_handle_t *pamh, int ctrl, struct winbindd_response *response)
{
_pam_set_data_string(pamh, ctrl, PAM_WINBIND_HOMEDIR, response->data.auth.info3.home_dir);
_pam_set_data_string(pamh, ctrl, PAM_WINBIND_LOGONSCRIPT, response->data.auth.info3.logon_script);
_pam_set_data_string(pamh, ctrl, PAM_WINBIND_LOGONSERVER, response->data.auth.info3.logon_srv);
_pam_set_data_string(pamh, ctrl, PAM_WINBIND_PROFILEPATH, response->data.auth.info3.profile_path);
}
/**
* Free info3 strings in the PAM stack.
*
* @param pamh PAM handle
*
* @return void.
*/
static void _pam_free_data_info3(pam_handle_t *pamh)
{
pam_set_data(pamh, PAM_WINBIND_HOMEDIR, NULL, NULL);
pam_set_data(pamh, PAM_WINBIND_LOGONSCRIPT, NULL, NULL);
pam_set_data(pamh, PAM_WINBIND_LOGONSERVER, NULL, NULL);
pam_set_data(pamh, PAM_WINBIND_PROFILEPATH, NULL, NULL);
}
/**
* Send PAM_ERROR_MSG for cached or grace logons.
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param username User in PAM request.
* @param info3_user_flgs Info3 flags containing logon type bits.
*
* @return void.
*/
static void _pam_warn_logon_type(pam_handle_t *pamh, int ctrl, const char *username, uint32 info3_user_flgs)
{
/* inform about logon type */
if (PAM_WB_GRACE_LOGON(info3_user_flgs)) {
_make_remark(pamh, ctrl, PAM_ERROR_MSG,
"Grace login. Please change your password as soon you're online again");
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
"User %s logged on using grace logon\n", username);
} else if (PAM_WB_CACHED_LOGON(info3_user_flgs)) {
_make_remark(pamh, ctrl, PAM_ERROR_MSG,
"Domain Controller unreachable, using cached credentials instead. Network resources may be unavailable");
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
"User %s logged on using cached credentials\n", username);
}
}
/**
* Send PAM_ERROR_MSG for krb5 errors.
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param username User in PAM request.
* @param info3_user_flgs Info3 flags containing logon type bits.
*
* @return void.
*/
static void _pam_warn_krb5_failure(pam_handle_t *pamh, int ctrl, const char *username, uint32 info3_user_flgs)
{
if (PAM_WB_KRB5_CLOCK_SKEW(info3_user_flgs)) {
_make_remark(pamh, ctrl, PAM_ERROR_MSG,
"Failed to establish your Kerberos Ticket cache "
"due time differences\n"
"with the domain controller. "
"Please verify the system time.\n");
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
"User %s: Clock skew when getting Krb5 TGT\n", username);
}
}
/**
* Compose Password Restriction String for a PAM_ERROR_MSG conversation.
*
* @param response The struct winbindd_response.
*
* @return string (caller needs to free).
*/
static char *_pam_compose_pwd_restriction_string(struct winbindd_response *response)
{
char *str = NULL;
size_t offset = 0, ret = 0, str_size = 1024;
str = (char *)malloc(str_size);
if (!str) {
return NULL;
}
memset(str, '\0', str_size);
offset = snprintf(str, str_size, "Your password ");
if (offset == -1) {
goto failed;
}
if (response->data.auth.policy.min_length_password > 0) {
ret = snprintf(str+offset, str_size-offset,
"must be at least %d characters; ",
response->data.auth.policy.min_length_password);
if (ret == -1) {
goto failed;
}
offset += ret;
}
if (response->data.auth.policy.password_history > 0) {
ret = snprintf(str+offset, str_size-offset,
"cannot repeat any of your previous %d passwords; ",
response->data.auth.policy.password_history);
if (ret == -1) {
goto failed;
}
offset += ret;
}
if (response->data.auth.policy.password_properties & DOMAIN_PASSWORD_COMPLEX) {
ret = snprintf(str+offset, str_size-offset,
"must contain capitals, numerals or punctuation; "
"and cannot contain your account or full name; ");
if (ret == -1) {
goto failed;
}
offset += ret;
}
ret = snprintf(str+offset, str_size-offset,
"Please type a different password. "
"Type a password which meets these requirements in both text boxes.");
if (ret == -1) {
goto failed;
}
return str;
failed:
SAFE_FREE(str);
return NULL;
}
/* talk to winbindd */
static int winbind_auth_request(pam_handle_t * pamh,
int ctrl,
const char *user,
const char *pass,
const char *member,
const char *cctype,
struct winbindd_response *p_response,
time_t *pwd_last_set,
char **user_ret)
{
struct winbindd_request request;
struct winbindd_response response;
int ret;
BOOL already_expired = False;
ZERO_STRUCT(request);
ZERO_STRUCT(response);
if (pwd_last_set) {
*pwd_last_set = 0;
}
strncpy(request.data.auth.user, user,
sizeof(request.data.auth.user)-1);
strncpy(request.data.auth.pass, pass,
sizeof(request.data.auth.pass)-1);
request.data.auth.krb5_cc_type[0] = '\0';
request.data.auth.uid = -1;
request.flags = WBFLAG_PAM_INFO3_TEXT | WBFLAG_PAM_CONTACT_TRUSTDOM;
if (ctrl & (WINBIND_KRB5_AUTH|WINBIND_CACHED_LOGIN)) {
struct passwd *pwd = NULL;
pwd = getpwnam(user);
if (pwd == NULL) {
return PAM_USER_UNKNOWN;
}
request.data.auth.uid = pwd->pw_uid;
}
if (ctrl & WINBIND_KRB5_AUTH) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling krb5 login flag\n");
request.flags |= WBFLAG_PAM_KRB5 | WBFLAG_PAM_FALLBACK_AFTER_KRB5;
}
if (ctrl & WINBIND_CACHED_LOGIN) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling cached login flag\n");
request.flags |= WBFLAG_PAM_CACHED_LOGIN;
}
if (user_ret) {
*user_ret = NULL;
request.flags |= WBFLAG_PAM_UNIX_NAME;
}
if (cctype != NULL) {
strncpy(request.data.auth.krb5_cc_type, cctype,
sizeof(request.data.auth.krb5_cc_type) - 1);
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "enabling request for a %s krb5 ccache\n", cctype);
}
request.data.auth.require_membership_of_sid[0] = '\0';
if (member != NULL) {
if (!winbind_name_list_to_sid_string_list(pamh, ctrl, user, member,
request.data.auth.require_membership_of_sid,
sizeof(request.data.auth.require_membership_of_sid))) {
_pam_log_debug(pamh, ctrl, LOG_ERR, "failed to serialize membership of sid \"%s\"\n", member);
return PAM_AUTH_ERR;
}
}
ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_AUTH, &request, &response, user);
if (pwd_last_set) {
*pwd_last_set = response.data.auth.info3.pass_last_set_time;
}
if (p_response) {
/* We want to process the response in the caller. */
*p_response = response;
return ret;
}
if (ret) {
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PASSWORD_EXPIRED");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PASSWORD_MUST_CHANGE");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_INVALID_WORKSTATION");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_INVALID_LOGON_HOURS");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_EXPIRED");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_DISABLED");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCOUNT_LOCKED_OUT");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_WRONG_PASSWORD");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
}
if (ret == PAM_SUCCESS) {
/* warn a user if the password is about to expire soon */
_pam_warn_password_expiry(pamh, ctrl, &response, &already_expired);
if (already_expired == True) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "Password has expired "
"(Password was last set: %lld, the policy says "
"it should expire here %lld (now it's: %lu))\n",
response.data.auth.info3.pass_last_set_time,
response.data.auth.info3.pass_last_set_time +
response.data.auth.policy.expire,
time(NULL));
return PAM_AUTHTOK_EXPIRED;
}
/* inform about logon type */
_pam_warn_logon_type(pamh, ctrl, user, response.data.auth.info3.user_flgs);
/* inform about krb5 failures */
_pam_warn_krb5_failure(pamh, ctrl, user, response.data.auth.info3.user_flgs);
/* set some info3 info for other modules in the stack */
_pam_set_data_info3(pamh, ctrl, &response);
/* put krb5ccname into env */
_pam_setup_krb5_env(pamh, ctrl, response.data.auth.krb5ccname);
/* If winbindd returned a username, return the pointer to it here. */
if (user_ret && response.extra_data.data) {
/* We have to trust it's a null terminated string. */
*user_ret = (char *)response.extra_data.data;
}
}
return ret;
}
/* talk to winbindd */
static int winbind_chauthtok_request(pam_handle_t * pamh,
int ctrl,
const char *user,
const char *oldpass,
const char *newpass,
time_t pwd_last_set)
{
struct winbindd_request request;
struct winbindd_response response;
int ret;
ZERO_STRUCT(request);
ZERO_STRUCT(response);
if (request.data.chauthtok.user == NULL) return -2;
strncpy(request.data.chauthtok.user, user,
sizeof(request.data.chauthtok.user) - 1);
if (oldpass != NULL) {
strncpy(request.data.chauthtok.oldpass, oldpass,
sizeof(request.data.chauthtok.oldpass) - 1);
} else {
request.data.chauthtok.oldpass[0] = '\0';
}
if (newpass != NULL) {
strncpy(request.data.chauthtok.newpass, newpass,
sizeof(request.data.chauthtok.newpass) - 1);
} else {
request.data.chauthtok.newpass[0] = '\0';
}
if (ctrl & WINBIND_KRB5_AUTH) {
request.flags = WBFLAG_PAM_KRB5 | WBFLAG_PAM_CONTACT_TRUSTDOM;
}
ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_CHAUTHTOK, &request, &response, user);
if (ret == PAM_SUCCESS) {
return ret;
}
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_BACKUP_CONTROLLER");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
/* TODO: tell the min pwd length ? */
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_TOO_SHORT");
/* TODO: tell the minage ? */
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_TOO_RECENT");
/* TODO: tell the history length ? */
PAM_WB_REMARK_CHECK_RESPONSE_RET(pamh, ctrl, response, "NT_STATUS_PWD_HISTORY_CONFLICT");
if (!strcasecmp(response.data.auth.nt_status_string, "NT_STATUS_PASSWORD_RESTRICTION")) {
char *pwd_restriction_string = NULL;
/* FIXME: avoid to send multiple PAM messages after another */
switch (response.data.auth.reject_reason) {
case -1:
break;
case REJECT_REASON_OTHER:
if ((response.data.auth.policy.min_passwordage > 0) &&
(pwd_last_set + response.data.auth.policy.min_passwordage > time(NULL))) {
PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PWD_TOO_RECENT");
}
break;
case REJECT_REASON_TOO_SHORT:
PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PWD_TOO_SHORT");
break;
case REJECT_REASON_IN_HISTORY:
PAM_WB_REMARK_DIRECT(pamh, ctrl, "NT_STATUS_PWD_HISTORY_CONFLICT");
break;
case REJECT_REASON_NOT_COMPLEX:
_make_remark(pamh, ctrl, PAM_ERROR_MSG, "Password does not meet complexity requirements");
break;
default:
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
"unknown password change reject reason: %d",
response.data.auth.reject_reason);
break;
}
pwd_restriction_string = _pam_compose_pwd_restriction_string(&response);
if (pwd_restriction_string) {
_make_remark(pamh, ctrl, PAM_ERROR_MSG, pwd_restriction_string);
SAFE_FREE(pwd_restriction_string);
}
}
return ret;
}
/*
* Checks if a user has an account
*
* return values:
* 1 = User not found
* 0 = OK
* -1 = System error
*/
static int valid_user(pam_handle_t *pamh, int ctrl, const char *user)
{
/* check not only if the user is available over NSS calls, also make
* sure it's really a winbind user, this is important when stacking PAM
* modules in the 'account' or 'password' facility. */
struct passwd *pwd = NULL;
struct winbindd_request request;
struct winbindd_response response;
int ret;
ZERO_STRUCT(request);
ZERO_STRUCT(response);
pwd = getpwnam(user);
if (pwd == NULL) {
return 1;
}
strncpy(request.data.username, user,
sizeof(request.data.username) - 1);
ret = pam_winbind_request_log(pamh, ctrl, WINBINDD_GETPWNAM, &request, &response, user);
switch (ret) {
case PAM_USER_UNKNOWN:
return 1;
case PAM_SUCCESS:
return 0;
default:
break;
}
return -1;
}
static char *_pam_delete(register char *xx)
{
_pam_overwrite(xx);
_pam_drop(xx);
return NULL;
}
/*
* obtain a password from the user
*/
static int _winbind_read_password(pam_handle_t * pamh,
unsigned int ctrl,
const char *comment,
const char *prompt1,
const char *prompt2,
const char **pass)
{
int authtok_flag;
int retval;
const char *item;
char *token;
_pam_log(pamh, ctrl, LOG_DEBUG, "getting password (0x%08x)", ctrl);
/*
* make sure nothing inappropriate gets returned
*/
*pass = token = NULL;
/*
* which authentication token are we getting?
*/
authtok_flag = on(WINBIND__OLD_PASSWORD, ctrl) ? PAM_OLDAUTHTOK : PAM_AUTHTOK;
/*
* should we obtain the password from a PAM item ?
*/
if (on(WINBIND_TRY_FIRST_PASS_ARG, ctrl) || on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
retval = _pam_get_item(pamh, authtok_flag, &item);
if (retval != PAM_SUCCESS) {
/* very strange. */
_pam_log(pamh, ctrl, LOG_ALERT,
"pam_get_item returned error to unix-read-password"
);
return retval;
} else if (item != NULL) { /* we have a password! */
*pass = item;
item = NULL;
_pam_log(pamh, ctrl, LOG_DEBUG,
"pam_get_item returned a password");
return PAM_SUCCESS;
} else if (on(WINBIND_USE_FIRST_PASS_ARG, ctrl)) {
return PAM_AUTHTOK_RECOVER_ERR; /* didn't work */
} else if (on(WINBIND_USE_AUTHTOK_ARG, ctrl)
&& off(WINBIND__OLD_PASSWORD, ctrl)) {
return PAM_AUTHTOK_RECOVER_ERR;
}
}
/*
* getting here implies we will have to get the password from the
* user directly.
*/
{
struct pam_message msg[3], *pmsg[3];
struct pam_response *resp;
int i, replies;
/* prepare to converse */
if (comment != NULL && off(ctrl, WINBIND_SILENT)) {
pmsg[0] = &msg[0];
msg[0].msg_style = PAM_TEXT_INFO;
msg[0].msg = CONST_DISCARD(char *, comment);
i = 1;
} else {
i = 0;
}
pmsg[i] = &msg[i];
msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
msg[i++].msg = CONST_DISCARD(char *, prompt1);
replies = 1;
if (prompt2 != NULL) {
pmsg[i] = &msg[i];
msg[i].msg_style = PAM_PROMPT_ECHO_OFF;
msg[i++].msg = CONST_DISCARD(char *, prompt2);
++replies;
}
/* so call the conversation expecting i responses */
resp = NULL;
retval = converse(pamh, i, pmsg, &resp);
if (resp != NULL) {
/* interpret the response */
if (retval == PAM_SUCCESS) { /* a good conversation */
token = x_strdup(resp[i - replies].resp);
if (token != NULL) {
if (replies == 2) {
/* verify that password entered correctly */
if (!resp[i - 1].resp
|| strcmp(token, resp[i - 1].resp)) {
_pam_delete(token); /* mistyped */
retval = PAM_AUTHTOK_RECOVER_ERR;
_make_remark(pamh, ctrl, PAM_ERROR_MSG, MISTYPED_PASS);
}
}
} else {
_pam_log(pamh, ctrl, LOG_NOTICE, "could not recover authentication token");
retval = PAM_AUTHTOK_RECOVER_ERR;
}
}
/*
* tidy up the conversation (resp_retcode) is ignored
* -- what is it for anyway? AGM
*/
_pam_drop_reply(resp, i);
} else {
retval = (retval == PAM_SUCCESS)
? PAM_AUTHTOK_RECOVER_ERR : retval;
}
}
if (retval != PAM_SUCCESS) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
"unable to obtain a password");
return retval;
}
/* 'token' is the entered password */
/* we store this password as an item */
retval = pam_set_item(pamh, authtok_flag, token);
_pam_delete(token); /* clean it up */
if (retval != PAM_SUCCESS ||
(retval = _pam_get_item(pamh, authtok_flag, &item)) != PAM_SUCCESS) {
_pam_log(pamh, ctrl, LOG_CRIT, "error manipulating password");
return retval;
}
*pass = item;
item = NULL; /* break link to password */
return PAM_SUCCESS;
}
const char *get_conf_item_string(const pam_handle_t *pamh,
int argc,
const char **argv,
int ctrl,
dictionary *d,
const char *item,
int config_flag)
{
int i = 0;
const char *parm_opt = NULL;
char *key = NULL;
if (!(ctrl & config_flag)) {
goto out;
}
/* let the pam opt take precedence over the pam_winbind.conf option */
if (d != NULL) {
if (!asprintf(&key, "global:%s", item)) {
goto out;
}
parm_opt = iniparser_getstr(d, key);
SAFE_FREE(key);
}
for ( i=0; i<argc; i++ ) {
if ((strncmp(argv[i], item, strlen(item)) == 0)) {
char *p;
if ( (p = strchr( argv[i], '=' )) == NULL) {
_pam_log(pamh, ctrl, LOG_INFO, "no \"=\" delimiter for \"%s\" found\n", item);
goto out;
}
_pam_log_debug(pamh, ctrl, LOG_INFO, "PAM config: %s '%s'\n", item, p+1);
return p + 1;
}
}
if (d != NULL) {
_pam_log_debug(pamh, ctrl, LOG_INFO, "CONFIG file: %s '%s'\n", item, parm_opt);
}
out:
return parm_opt;
}
const char *get_krb5_cc_type_from_config(const pam_handle_t *pamh, int argc, const char **argv, int ctrl, dictionary *d)
{
return get_conf_item_string(pamh, argc, argv, ctrl, d, "krb5_ccache_type", WINBIND_KRB5_CCACHE_TYPE);
}
const char *get_member_from_config(const pam_handle_t *pamh, int argc, const char **argv, int ctrl, dictionary *d)
{
const char *ret = NULL;
ret = get_conf_item_string(pamh, argc, argv, ctrl, d, "require_membership_of", WINBIND_REQUIRED_MEMBERSHIP);
if (ret) {
return ret;
}
return get_conf_item_string(pamh, argc, argv, ctrl, d, "require-membership-of", WINBIND_REQUIRED_MEMBERSHIP);
}
PAM_EXTERN
int pam_sm_authenticate(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
const char *username;
const char *password;
const char *member = NULL;
const char *cctype = NULL;
int retval = PAM_AUTH_ERR;
dictionary *d = NULL;
char *username_ret = NULL;
char *new_authtok_required = NULL;
char *real_username = NULL;
/* parse arguments */
int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
if (ctrl == -1) {
retval = PAM_SYSTEM_ERR;
goto out;
}
_PAM_LOG_FUNCTION_ENTER("pam_sm_authenticate", pamh, ctrl, flags);
/* Get the username */
retval = pam_get_user(pamh, &username, NULL);
if ((retval != PAM_SUCCESS) || (!username)) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "can not get the username");
retval = PAM_SERVICE_ERR;
goto out;
}
#if defined(AIX)
/* Decode the user name since AIX does not support logn user
names by default. The name is encoded as _#uid. */
if ( username[0] == '_' ) {
uid_t id = atoi( &username[1] );
struct passwd *pw = NULL;
if ( (id!=0) && ((pw = getpwuid( id )) != NULL) ) {
real_username = strdup( pw->pw_name );
}
}
#endif
if ( !real_username ) {
/* Just making a copy of the username we got from PAM */
if ( (real_username = strdup( username )) == NULL ) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG,
"memory allocation failure when copying username");
retval = PAM_SERVICE_ERR;
goto out;
}
}
retval = _winbind_read_password(pamh, ctrl, NULL,
"Password: ", NULL,
&password);
if (retval != PAM_SUCCESS) {
_pam_log(pamh, ctrl, LOG_ERR, "Could not retrieve user's password");
retval = PAM_AUTHTOK_ERR;
goto out;
}
/* Let's not give too much away in the log file */
#ifdef DEBUG_PASSWORD
_pam_log_debug(pamh, ctrl, LOG_INFO, "Verify user '%s' with password '%s'",
real_username, password);
#else
_pam_log_debug(pamh, ctrl, LOG_INFO, "Verify user '%s'", real_username);
#endif
member = get_member_from_config(pamh, argc, argv, ctrl, d);
cctype = get_krb5_cc_type_from_config(pamh, argc, argv, ctrl, d);
/* Now use the username to look up password */
retval = winbind_auth_request(pamh, ctrl, username, password, member,
cctype, NULL, NULL, &username_ret);
if (retval == PAM_NEW_AUTHTOK_REQD ||
retval == PAM_AUTHTOK_EXPIRED) {
char *new_authtok_required_during_auth = NULL;
if (!asprintf(&new_authtok_required, "%d", retval)) {
retval = PAM_BUF_ERR;
goto out;
}
pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, new_authtok_required, _pam_winbind_cleanup_func);
retval = PAM_SUCCESS;
if (!asprintf(&new_authtok_required_during_auth, "%d", True)) {
retval = PAM_BUF_ERR;
goto out;
}
pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH,
new_authtok_required_during_auth, _pam_winbind_cleanup_func);
goto out;
}
out:
if (username_ret) {
pam_set_item (pamh, PAM_USER, username_ret);
_pam_log_debug(pamh, ctrl, LOG_INFO, "Returned user was '%s'", username_ret);
free(username_ret);
}
if ( real_username ) {
free( real_username );
}
if (d) {
iniparser_freedict(d);
}
if (!new_authtok_required) {
pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, NULL, NULL);
}
if (retval != PAM_SUCCESS) {
_pam_free_data_info3(pamh);
}
_PAM_LOG_FUNCTION_LEAVE("pam_sm_authenticate", pamh, ctrl, retval);
return retval;
}
PAM_EXTERN
int pam_sm_setcred(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
int ret = PAM_SYSTEM_ERR;
dictionary *d = NULL;
/* parse arguments */
int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
if (ctrl == -1) {
ret = PAM_SYSTEM_ERR;
goto out;
}
_PAM_LOG_FUNCTION_ENTER("pam_sm_setcred", pamh, ctrl, flags);
switch (flags & ~PAM_SILENT) {
case PAM_DELETE_CRED:
ret = pam_sm_close_session(pamh, flags, argc, argv);
break;
case PAM_REFRESH_CRED:
_pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_REFRESH_CRED not implemented");
ret = PAM_SUCCESS;
break;
case PAM_REINITIALIZE_CRED:
_pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_REINITIALIZE_CRED not implemented");
ret = PAM_SUCCESS;
break;
case PAM_ESTABLISH_CRED:
_pam_log_debug(pamh, ctrl, LOG_WARNING, "PAM_ESTABLISH_CRED not implemented");
ret = PAM_SUCCESS;
break;
default:
ret = PAM_SYSTEM_ERR;
break;
}
out:
if (d) {
iniparser_freedict(d);
}
_PAM_LOG_FUNCTION_LEAVE("pam_sm_setcred", pamh, ctrl, ret);
return ret;
}
/*
* Account management. We want to verify that the account exists
* before returning PAM_SUCCESS
*/
PAM_EXTERN
int pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
const char *username;
int ret = PAM_USER_UNKNOWN;
void *tmp = NULL;
dictionary *d = NULL;
/* parse arguments */
int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
if (ctrl == -1) {
return PAM_SYSTEM_ERR;
}
_PAM_LOG_FUNCTION_ENTER("pam_sm_acct_mgmt", pamh, ctrl, flags);
/* Get the username */
ret = pam_get_user(pamh, &username, NULL);
if ((ret != PAM_SUCCESS) || (!username)) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG,"can not get the username");
ret = PAM_SERVICE_ERR;
goto out;
}
/* Verify the username */
ret = valid_user(pamh, ctrl, username);
switch (ret) {
case -1:
/* some sort of system error. The log was already printed */
ret = PAM_SERVICE_ERR;
goto out;
case 1:
/* the user does not exist */
_pam_log_debug(pamh, ctrl, LOG_NOTICE, "user '%s' not found", username);
if (ctrl & WINBIND_UNKNOWN_OK_ARG) {
ret = PAM_IGNORE;
goto out;
}
ret = PAM_USER_UNKNOWN;
goto out;
case 0:
pam_get_data( pamh, PAM_WINBIND_NEW_AUTHTOK_REQD, (const void **)&tmp);
if (tmp != NULL) {
ret = atoi((const char *)tmp);
switch (ret) {
case PAM_AUTHTOK_EXPIRED:
/* fall through, since new token is required in this case */
case PAM_NEW_AUTHTOK_REQD:
_pam_log(pamh, ctrl, LOG_WARNING, "pam_sm_acct_mgmt success but %s is set",
PAM_WINBIND_NEW_AUTHTOK_REQD);
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' needs new password", username);
/* PAM_AUTHTOKEN_REQD does not exist, but is documented in the manpage */
ret = PAM_NEW_AUTHTOK_REQD;
goto out;
default:
_pam_log(pamh, ctrl, LOG_WARNING, "pam_sm_acct_mgmt success");
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", username);
ret = PAM_SUCCESS;
goto out;
}
}
/* Otherwise, the authentication looked good */
_pam_log(pamh, ctrl, LOG_NOTICE, "user '%s' granted access", username);
ret = PAM_SUCCESS;
goto out;
default:
/* we don't know anything about this return value */
_pam_log(pamh, ctrl, LOG_ERR, "internal module error (ret = %d, user = '%s')",
ret, username);
ret = PAM_SERVICE_ERR;
goto out;
}
/* should not be reached */
ret = PAM_IGNORE;
out:
if (d) {
iniparser_freedict(d);
}
_PAM_LOG_FUNCTION_LEAVE("pam_sm_acct_mgmt", pamh, ctrl, ret);
return ret;
}
PAM_EXTERN
int pam_sm_open_session(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
int ret = PAM_SYSTEM_ERR;
dictionary *d = NULL;
/* parse arguments */
int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
if (ctrl == -1) {
ret = PAM_SYSTEM_ERR;
goto out;
}
_PAM_LOG_FUNCTION_ENTER("pam_sm_open_session", pamh, ctrl, flags);
ret = PAM_SUCCESS;
out:
if (d) {
iniparser_freedict(d);
}
_PAM_LOG_FUNCTION_LEAVE("pam_sm_open_session", pamh, ctrl, ret);
return ret;
}
PAM_EXTERN
int pam_sm_close_session(pam_handle_t *pamh, int flags,
int argc, const char **argv)
{
dictionary *d = NULL;
int retval = PAM_SUCCESS;
/* parse arguments */
int ctrl = _pam_parse(pamh, flags, argc, argv, &d);
if (ctrl == -1) {
retval = PAM_SYSTEM_ERR;
goto out;
}
_PAM_LOG_FUNCTION_ENTER("pam_sm_close_session", pamh, ctrl, flags);
if (!(flags & PAM_DELETE_CRED)) {
retval = PAM_SUCCESS;
goto out;
}
if (ctrl & WINBIND_KRB5_AUTH) {
/* destroy the ccache here */
struct winbindd_request request;
struct winbindd_response response;
const char *user;
const char *ccname = NULL;
struct passwd *pwd = NULL;
ZERO_STRUCT(request);
ZERO_STRUCT(response);
retval = pam_get_user(pamh, &user, "Username: ");
if (retval) {
_pam_log(pamh, ctrl, LOG_ERR, "could not identify user");
goto out;
}
if (user == NULL) {
_pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
retval = PAM_USER_UNKNOWN;
goto out;
}
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained", user);
ccname = pam_getenv(pamh, "KRB5CCNAME");
if (ccname == NULL) {
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "user has no KRB5CCNAME environment");
}
strncpy(request.data.logoff.user, user,
sizeof(request.data.logoff.user) - 1);
if (ccname) {
strncpy(request.data.logoff.krb5ccname, ccname,
sizeof(request.data.logoff.krb5ccname) - 1);
}
pwd = getpwnam(user);
if (pwd == NULL) {
retval = PAM_USER_UNKNOWN;
goto out;
}
request.data.logoff.uid = pwd->pw_uid;
request.flags = WBFLAG_PAM_KRB5 | WBFLAG_PAM_CONTACT_TRUSTDOM;
retval = pam_winbind_request_log(pamh, ctrl, WINBINDD_PAM_LOGOFF, &request, &response, user);
}
out:
if (d) {
iniparser_freedict(d);
}
_PAM_LOG_FUNCTION_LEAVE("pam_sm_close_session", pamh, ctrl, retval);
return retval;
}
/**
* evaluate whether we need to re-authenticate with kerberos after a password change
*
* @param pamh PAM handle
* @param ctrl PAM winbind options.
* @param user The username
*
* @return boolean Returns True if required, False if not.
*/
static BOOL _pam_require_krb5_auth_after_chauthtok(pam_handle_t *pamh, int ctrl, const char *user)
{
/* Make sure that we only do this if
* a) the chauthtok got initiated during a logon attempt (authenticate->acct_mgmt->chauthtok)
* b) any later password change via the "passwd" command if done by the user itself
*/
char *new_authtok_reqd_during_auth = NULL;
struct passwd *pwd = NULL;
if (!(ctrl & WINBIND_KRB5_AUTH)) {
return False;
}
_pam_get_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH, &new_authtok_reqd_during_auth);
pam_set_data(pamh, PAM_WINBIND_NEW_AUTHTOK_REQD_DURING_AUTH, NULL, NULL);
if (new_authtok_reqd_during_auth) {
return True;
}
pwd = getpwnam(user);
if (!pwd) {
return False;
}
if (getuid() == pwd->pw_uid) {
return True;
}
return False;
}
PAM_EXTERN
int pam_sm_chauthtok(pam_handle_t * pamh, int flags,
int argc, const char **argv)
{
unsigned int lctrl;
int ret;
unsigned int ctrl;
/* <DO NOT free() THESE> */
const char *user;
char *pass_old, *pass_new;
/* </DO NOT free() THESE> */
char *Announce;
int retry = 0;
dictionary *d = NULL;
char *username_ret = NULL;
struct winbindd_response response;
ZERO_STRUCT(response);
ctrl = _pam_parse(pamh, flags, argc, argv, &d);
if (ctrl == -1) {
ret = PAM_SYSTEM_ERR;
goto out;
}
_PAM_LOG_FUNCTION_ENTER("pam_sm_chauthtok", pamh, ctrl, flags);
/* clearing offline bit for the auth in the password change */
ctrl &= ~WINBIND_CACHED_LOGIN;
/*
* First get the name of a user
*/
ret = pam_get_user(pamh, &user, "Username: ");
if (ret) {
_pam_log(pamh, ctrl, LOG_ERR,
"password - could not identify user");
goto out;
}
if (user == NULL) {
_pam_log(pamh, ctrl, LOG_ERR, "username was NULL!");
ret = PAM_USER_UNKNOWN;
goto out;
}
_pam_log_debug(pamh, ctrl, LOG_DEBUG, "username [%s] obtained", user);
/* check if this is really a user in winbindd, not only in NSS */
ret = valid_user(pamh, ctrl, user);
switch (ret) {
case 1:
ret = PAM_USER_UNKNOWN;
goto out;
case -1:
ret = PAM_SYSTEM_ERR;
goto out;
default:
break;
}
/*
* obtain and verify the current password (OLDAUTHTOK) for
* the user.
*/
if (flags & PAM_PRELIM_CHECK) {
time_t pwdlastset_prelim = 0;
/* instruct user what is happening */
#define greeting "Changing password for "
Announce = (char *) malloc(sizeof(greeting) + strlen(user));
if (Announce == NULL) {
_pam_log(pamh, ctrl, LOG_CRIT, "password - out of memory");
ret = PAM_BUF_ERR;
goto out;
}
(void) strcpy(Announce, greeting);
(void) strcpy(Announce + sizeof(greeting) - 1, user);
#undef greeting
lctrl = ctrl | WINBIND__OLD_PASSWORD;
ret = _winbind_read_password(pamh, lctrl,
Announce,
"(current) NT password: ",
NULL,
(const char **) &pass_old);
if (ret != PAM_SUCCESS) {
_pam_log(pamh, ctrl, LOG_NOTICE, "password - (old) token not obtained");
goto out;
}
/* verify that this is the password for this user */
ret = winbind_auth_request(pamh, ctrl, user, pass_old,
NULL, NULL, &response, &pwdlastset_prelim, NULL);
if (ret != PAM_ACCT_EXPIRED &&
ret != PAM_AUTHTOK_EXPIRED &&
ret != PAM_NEW_AUTHTOK_REQD &&
ret != PAM_SUCCESS) {
pass_old = NULL;
goto out;
}
pam_set_data(pamh, PAM_WINBIND_PWD_LAST_SET, (void *)pwdlastset_prelim, NULL);
ret = pam_set_item(pamh, PAM_OLDAUTHTOK, (const void *) pass_old);
pass_old = NULL;
if (ret != PAM_SUCCESS) {
_pam_log(pamh, ctrl, LOG_CRIT, "failed to set PAM_OLDAUTHTOK");
}
} else if (flags & PAM_UPDATE_AUTHTOK) {
time_t pwdlastset_update = 0;
/*
* obtain the proposed password
*/
/*
* get the old token back.
*/
ret = _pam_get_item(pamh, PAM_OLDAUTHTOK, &pass_old);
if (ret != PAM_SUCCESS) {
_pam_log(pamh, ctrl, LOG_NOTICE, "user not authenticated");
goto out;
}
lctrl = ctrl & ~WINBIND_TRY_FIRST_PASS_ARG;
if (on(WINBIND_USE_AUTHTOK_ARG, lctrl)) {
lctrl |= WINBIND_USE_FIRST_PASS_ARG;
}
retry = 0;
ret = PAM_AUTHTOK_ERR;
while ((ret != PAM_SUCCESS) && (retry++ < MAX_PASSWD_TRIES)) {
/*
* use_authtok is to force the use of a previously entered
* password -- needed for pluggable password strength checking
*/
ret = _winbind_read_password(pamh, lctrl,
NULL,
"Enter new NT password: ",
"Retype new NT password: ",
(const char **) &pass_new);
if (ret != PAM_SUCCESS) {
_pam_log_debug(pamh, ctrl, LOG_ALERT
,"password - new password not obtained");
pass_old = NULL;/* tidy up */
goto out;
}
/*
* At this point we know who the user is and what they
* propose as their new password. Verify that the new
* password is acceptable.
*/
if (pass_new[0] == '\0') {/* "\0" password = NULL */
pass_new = NULL;
}
}
/*
* By reaching here we have approved the passwords and must now
* rebuild the password database file.
*/
_pam_get_data( pamh, PAM_WINBIND_PWD_LAST_SET,
&pwdlastset_update);
ret = winbind_chauthtok_request(pamh, ctrl, user, pass_old, pass_new, pwdlastset_update);
if (ret) {
_pam_overwrite(pass_new);
_pam_overwrite(pass_old);
pass_old = pass_new = NULL;
goto out;
}
if (_pam_require_krb5_auth_after_chauthtok(pamh, ctrl, user)) {
const char *member = get_member_from_config(pamh, argc, argv, ctrl, d);
const char *cctype = get_krb5_cc_type_from_config(pamh, argc, argv, ctrl, d);
ret = winbind_auth_request(pamh, ctrl, user, pass_new,
member, cctype, &response, NULL, &username_ret);
_pam_overwrite(pass_new);
_pam_overwrite(pass_old);
pass_old = pass_new = NULL;
if (ret == PAM_SUCCESS) {
/* warn a user if the password is about to expire soon */
_pam_warn_password_expiry(pamh, ctrl, &response, NULL);
/* set some info3 info for other modules in the stack */
_pam_set_data_info3(pamh, ctrl, &response);
/* put krb5ccname into env */
_pam_setup_krb5_env(pamh, ctrl, response.data.auth.krb5ccname);
if (username_ret) {
pam_set_item (pamh, PAM_USER, username_ret);
_pam_log_debug(pamh, ctrl, LOG_INFO, "Returned user was '%s'", username_ret);
free(username_ret);
}
}
goto out;
}
} else {
ret = PAM_SERVICE_ERR;
}
out:
if (d) {
iniparser_freedict(d);
}
/* Deal with offline errors. */
PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_NO_LOGON_SERVERS");
PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND");
PAM_WB_REMARK_CHECK_RESPONSE(pamh, ctrl, response, "NT_STATUS_ACCESS_DENIED");
_PAM_LOG_FUNCTION_LEAVE("pam_sm_chauthtok", pamh, ctrl, ret);
return ret;
}
#ifdef PAM_STATIC
/* static module data */
struct pam_module _pam_winbind_modstruct = {
MODULE_NAME,
pam_sm_authenticate,
pam_sm_setcred,
pam_sm_acct_mgmt,
pam_sm_open_session,
pam_sm_close_session,
pam_sm_chauthtok
};
#endif
/*
* Copyright (c) Andrew Tridgell <tridge@samba.org> 2000
* Copyright (c) Tim Potter <tpot@samba.org> 2000
* Copyright (c) Andrew Bartlettt <abartlet@samba.org> 2002
* Copyright (c) Guenther Deschner <gd@samba.org> 2005-2007
* Copyright (c) Jan Rêkorajski 1999.
* Copyright (c) Andrew G. Morgan 1996-8.
* Copyright (c) Alex O. Yuriev, 1996.
* Copyright (c) Cristian Gafton 1996.
* Copyright (C) Elliot Lee <sopwith@redhat.com> 1996, Red Hat Software.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* ALTERNATIVELY, this product may be distributed under the terms of
* the GNU Public License, in which case the provisions of the GPL are
* required INSTEAD OF the above restrictions. (This clause is
* necessary due to a potential bad interaction between the GPL and
* the restrictions contained in a BSD-style copyright.)
*
* THIS SOFTWARE IS PROVIDED `AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
|