samba-mirror/source3/nsswitch/winbindd_pam.c

/*
   Unix SMB/CIFS implementation.

   Winbind daemon - pam auth funcions

   Copyright (C) Andrew Tridgell 2000
   Copyright (C) Tim Potter 2001
   Copyright (C) Andrew Bartlett 2001-2002
   Copyright (C) Guenther Deschner 2005
   
   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/>.
*/

#include "includes.h"
#include "winbindd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND

static NTSTATUS append_info3_as_txt(TALLOC_CTX *mem_ctx, 
				    struct winbindd_cli_state *state, 
				    NET_USER_INFO_3 *info3) 
{
	fstring str_sid;

	state->response.data.auth.info3.logon_time = 
		nt_time_to_unix(info3->logon_time);
	state->response.data.auth.info3.logoff_time = 
		nt_time_to_unix(info3->logoff_time);
	state->response.data.auth.info3.kickoff_time = 
		nt_time_to_unix(info3->kickoff_time);
	state->response.data.auth.info3.pass_last_set_time = 
		nt_time_to_unix(info3->pass_last_set_time);
	state->response.data.auth.info3.pass_can_change_time = 
		nt_time_to_unix(info3->pass_can_change_time);
	state->response.data.auth.info3.pass_must_change_time = 
		nt_time_to_unix(info3->pass_must_change_time);

	state->response.data.auth.info3.logon_count = info3->logon_count;
	state->response.data.auth.info3.bad_pw_count = info3->bad_pw_count;

	state->response.data.auth.info3.user_rid = info3->user_rid;
	state->response.data.auth.info3.group_rid = info3->group_rid;
	sid_to_string(str_sid, &(info3->dom_sid.sid));
	fstrcpy(state->response.data.auth.info3.dom_sid, str_sid);

	state->response.data.auth.info3.num_groups = info3->num_groups;
	state->response.data.auth.info3.user_flgs = info3->user_flgs;

	state->response.data.auth.info3.acct_flags = info3->acct_flags;
	state->response.data.auth.info3.num_other_sids = info3->num_other_sids;

	unistr2_to_ascii(state->response.data.auth.info3.user_name, 
		&info3->uni_user_name, -1);
	unistr2_to_ascii(state->response.data.auth.info3.full_name, 
		&info3->uni_full_name, -1);
	unistr2_to_ascii(state->response.data.auth.info3.logon_script, 
		&info3->uni_logon_script, -1);
	unistr2_to_ascii(state->response.data.auth.info3.profile_path, 
		&info3->uni_profile_path, -1);
	unistr2_to_ascii(state->response.data.auth.info3.home_dir, 
		&info3->uni_home_dir, -1);
	unistr2_to_ascii(state->response.data.auth.info3.dir_drive, 
		&info3->uni_dir_drive, -1);

	unistr2_to_ascii(state->response.data.auth.info3.logon_srv, 
		&info3->uni_logon_srv, -1);
	unistr2_to_ascii(state->response.data.auth.info3.logon_dom, 
		&info3->uni_logon_dom, -1);

	return NT_STATUS_OK;
}

static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx, 
				    struct winbindd_cli_state *state, 
				    NET_USER_INFO_3 *info3) 
{
	prs_struct ps;
	uint32 size;
	if (!prs_init(&ps, 256 /* Random, non-zero number */, mem_ctx, MARSHALL)) {
		return NT_STATUS_NO_MEMORY;
	}
	if (!net_io_user_info3("", info3, &ps, 1, 3, False)) {
		prs_mem_free(&ps);
		return NT_STATUS_UNSUCCESSFUL;
	}

	size = prs_data_size(&ps);
	SAFE_FREE(state->response.extra_data.data);
	state->response.extra_data.data = SMB_MALLOC(size);
	if (!state->response.extra_data.data) {
		prs_mem_free(&ps);
		return NT_STATUS_NO_MEMORY;
	}
	memset( state->response.extra_data.data, '\0', size );
	prs_copy_all_data_out((char *)state->response.extra_data.data, &ps);
	state->response.length += size;
	prs_mem_free(&ps);
	return NT_STATUS_OK;
}

static NTSTATUS append_unix_username(TALLOC_CTX *mem_ctx,
				     struct winbindd_cli_state *state,
				     const NET_USER_INFO_3 *info3,
				     const char *name_domain,
				     const char *name_user)
{
	/* We've been asked to return the unix username, per
	   'winbind use default domain' settings and the like */

	fstring username_out;
	const char *nt_username, *nt_domain;

	if (!(nt_domain = unistr2_tdup(mem_ctx,
				       &info3->uni_logon_dom))) {
		/* If the server didn't give us one, just use the one
		 * we sent them */
		nt_domain = name_domain;
	}

	if (!(nt_username = unistr2_tdup(mem_ctx,
					 &info3->uni_user_name))) {
		/* If the server didn't give us one, just use the one
		 * we sent them */
		nt_username = name_user;
	}

	fill_domain_username(username_out, nt_domain, nt_username,
			     True);

	DEBUG(5,("Setting unix username to [%s]\n", username_out));

	SAFE_FREE(state->response.extra_data.data);
	state->response.extra_data.data = SMB_STRDUP(username_out);
	if (!state->response.extra_data.data) {
		return NT_STATUS_NO_MEMORY;
	}
	state->response.length +=
		strlen((const char *)state->response.extra_data.data)+1;

	return NT_STATUS_OK;
}

static NTSTATUS append_afs_token(TALLOC_CTX *mem_ctx,
				 struct winbindd_cli_state *state,
				 const NET_USER_INFO_3 *info3,
				 const char *name_domain,
				 const char *name_user)
{
	char *afsname = NULL;
	char *cell;

	afsname = talloc_strdup(mem_ctx, lp_afs_username_map());
	if (afsname == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	afsname = talloc_string_sub(mem_ctx,
				    lp_afs_username_map(),
				    "%D", name_domain);
	afsname = talloc_string_sub(mem_ctx, afsname,
				    "%u", name_user);
	afsname = talloc_string_sub(mem_ctx, afsname,
				    "%U", name_user);

	{
		DOM_SID user_sid;
		fstring sidstr;

		sid_copy(&user_sid, &info3->dom_sid.sid);
		sid_append_rid(&user_sid, info3->user_rid);
		sid_to_string(sidstr, &user_sid);
		afsname = talloc_string_sub(mem_ctx, afsname,
					    "%s", sidstr);
	}

	if (afsname == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	strlower_m(afsname);

	DEBUG(10, ("Generating token for user %s\n", afsname));

	cell = strchr(afsname, '@');

	if (cell == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	*cell = '\0';
	cell += 1;

	/* Append an AFS token string */
	SAFE_FREE(state->response.extra_data.data);
	state->response.extra_data.data =
		afs_createtoken_str(afsname, cell);

	if (state->response.extra_data.data != NULL) {
		state->response.length +=
			strlen((const char *)state->response.extra_data.data)+1;
	}

	return NT_STATUS_OK;
}

static NTSTATUS check_info3_in_group(TALLOC_CTX *mem_ctx, 
				     NET_USER_INFO_3 *info3,
				     const char *group_sid) 
/**
 * Check whether a user belongs to a group or list of groups.
 *
 * @param mem_ctx talloc memory context.
 * @param info3 user information, including group membership info.
 * @param group_sid One or more groups , separated by commas.
 *
 * @return NT_STATUS_OK on success,
 *    NT_STATUS_LOGON_FAILURE if the user does not belong,
 *    or other NT_STATUS_IS_ERR(status) for other kinds of failure.
 */
{
	DOM_SID *require_membership_of_sid;
	size_t num_require_membership_of_sid;
	fstring req_sid;
	const char *p;
	DOM_SID sid;
	size_t i;
	struct nt_user_token *token;
	NTSTATUS status;

	/* Parse the 'required group' SID */
	
	if (!group_sid || !group_sid[0]) {
		/* NO sid supplied, all users may access */
		return NT_STATUS_OK;
	}

	if (!(token = TALLOC_ZERO_P(mem_ctx, struct nt_user_token))) {
		DEBUG(0, ("talloc failed\n"));
		return NT_STATUS_NO_MEMORY;
	}

	num_require_membership_of_sid = 0;
	require_membership_of_sid = NULL;

	p = group_sid;

	while (next_token(&p, req_sid, ",", sizeof(req_sid))) {
		if (!string_to_sid(&sid, req_sid)) {
			DEBUG(0, ("check_info3_in_group: could not parse %s "
				  "as a SID!", req_sid));
			return NT_STATUS_INVALID_PARAMETER;
		}

		if (!add_sid_to_array(mem_ctx, &sid,
				      &require_membership_of_sid,
				      &num_require_membership_of_sid)) {
			DEBUG(0, ("add_sid_to_array failed\n"));
			return NT_STATUS_NO_MEMORY;
		}
	}

	status = sid_array_from_info3(mem_ctx, info3, 
				      &token->user_sids, 
				      &token->num_sids,
				      True);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	if (!NT_STATUS_IS_OK(status = add_aliases(get_global_sam_sid(),
						  token))
	    || !NT_STATUS_IS_OK(status = add_aliases(&global_sid_Builtin,
						     token))) {
		DEBUG(3, ("could not add aliases: %s\n",
			  nt_errstr(status)));
		return status;
	}

	debug_nt_user_token(DBGC_CLASS, 10, token);

	for (i=0; i<num_require_membership_of_sid; i++) {
		DEBUG(10, ("Checking SID %s\n", sid_string_static(
				   &require_membership_of_sid[i])));
		if (nt_token_check_sid(&require_membership_of_sid[i],
				       token)) {
			DEBUG(10, ("Access ok\n"));
			return NT_STATUS_OK;
		}
	}
	
	/* Do not distinguish this error from a wrong username/pw */

	return NT_STATUS_LOGON_FAILURE;
}

struct winbindd_domain *find_auth_domain(struct winbindd_cli_state *state, 
					const char *domain_name)
{
	struct winbindd_domain *domain;

	if (IS_DC) {
		domain = find_domain_from_name_noinit(domain_name);
		if (domain == NULL) {
			DEBUG(3, ("Authentication for domain [%s] refused"
				  "as it is not a trusted domain\n", 
				  domain_name));
		}
		return domain;
	}

	if (is_myname(domain_name)) {
		DEBUG(3, ("Authentication for domain %s (local domain "
			  "to this server) not supported at this "
			  "stage\n", domain_name));
		return NULL;
	}

	/* we can auth against trusted domains */
	if (state->request.flags & WBFLAG_PAM_CONTACT_TRUSTDOM) {
		domain = find_domain_from_name_noinit(domain_name);
		if (domain == NULL) {
			DEBUG(3, ("Authentication for domain [%s] skipped " 
				  "as it is not a trusted domain\n", 
				  domain_name));
		} else {
			return domain;
		} 
	}

	return find_our_domain();
}

static void set_auth_errors(struct winbindd_response *resp, NTSTATUS result)
{
	resp->data.auth.nt_status = NT_STATUS_V(result);
	fstrcpy(resp->data.auth.nt_status_string, nt_errstr(result));

	/* we might have given a more useful error above */
	if (*resp->data.auth.error_string == '\0') 
		fstrcpy(resp->data.auth.error_string,
			get_friendly_nt_error_msg(result));
	resp->data.auth.pam_error = nt_status_to_pam(result);
}

static NTSTATUS fillup_password_policy(struct winbindd_domain *domain,
				       struct winbindd_cli_state *state)
{
	struct winbindd_methods *methods;
	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
	SAM_UNK_INFO_1 password_policy;

	if ( !winbindd_can_contact_domain( domain ) ) {
		DEBUG(5,("fillup_password_policy: No inbound trust to "
			 "contact domain %s\n", domain->name));		
		return NT_STATUS_NOT_SUPPORTED;
	}	

	methods = domain->methods;

	status = methods->password_policy(domain, state->mem_ctx, &password_policy);
	if (NT_STATUS_IS_ERR(status)) {
		return status;
	}

	state->response.data.auth.policy.min_length_password =
		password_policy.min_length_password;
	state->response.data.auth.policy.password_history =
		password_policy.password_history;
	state->response.data.auth.policy.password_properties =
		password_policy.password_properties;
	state->response.data.auth.policy.expire	=
		nt_time_to_unix_abs(&(password_policy.expire));
	state->response.data.auth.policy.min_passwordage = 
		nt_time_to_unix_abs(&(password_policy.min_passwordage));

	return NT_STATUS_OK;
}

static NTSTATUS get_max_bad_attempts_from_lockout_policy(struct winbindd_domain *domain, 
							 TALLOC_CTX *mem_ctx, 
							 uint16 *max_allowed_bad_attempts)
{
	struct winbindd_methods *methods;
	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
	SAM_UNK_INFO_12 lockout_policy;

	*max_allowed_bad_attempts = 0;

	methods = domain->methods;

	status = methods->lockout_policy(domain, mem_ctx, &lockout_policy);
	if (NT_STATUS_IS_ERR(status)) {
		return status;
	}

	*max_allowed_bad_attempts = lockout_policy.bad_attempt_lockout;

	return NT_STATUS_OK;
}

static NTSTATUS get_pwd_properties(struct winbindd_domain *domain, 
				   TALLOC_CTX *mem_ctx, 
				   uint32 *password_properties)
{
	struct winbindd_methods *methods;
	NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
	SAM_UNK_INFO_1 password_policy;

	*password_properties = 0;

	methods = domain->methods;

	status = methods->password_policy(domain, mem_ctx, &password_policy);
	if (NT_STATUS_IS_ERR(status)) {
		return status;
	}

	*password_properties = password_policy.password_properties;

	return NT_STATUS_OK;
}

#ifdef HAVE_KRB5

static const char *generate_krb5_ccache(TALLOC_CTX *mem_ctx, 
					const char *type,
					uid_t uid,
					BOOL *internal_ccache)
{
	/* accept FILE and WRFILE as krb5_cc_type from the client and then
	 * build the full ccname string based on the user's uid here -
	 * Guenther*/

	const char *gen_cc = NULL;

	*internal_ccache = True;

	if (uid == -1) {
		goto memory_ccache;
	}

	if (!type || type[0] == '\0') {
		goto memory_ccache;
	}

	if (strequal(type, "FILE")) {
		gen_cc = talloc_asprintf(mem_ctx, "FILE:/tmp/krb5cc_%d", uid);
	} else if (strequal(type, "WRFILE")) {
		gen_cc = talloc_asprintf(mem_ctx, "WRFILE:/tmp/krb5cc_%d", uid);
	} else {
		DEBUG(10,("we don't allow to set a %s type ccache\n", type));
		goto memory_ccache;
	}

	*internal_ccache = False;
	goto done;

  memory_ccache:
  	gen_cc = talloc_strdup(mem_ctx, "MEMORY:winbindd_pam_ccache");

  done:
  	if (gen_cc == NULL) {
		DEBUG(0,("out of memory\n"));
		return NULL;
	}

	DEBUG(10,("using ccache: %s %s\n", gen_cc, *internal_ccache ? "(internal)":""));

	return gen_cc;
}

static void setup_return_cc_name(struct winbindd_cli_state *state, const char *cc)
{
	const char *type = state->request.data.auth.krb5_cc_type;

	state->response.data.auth.krb5ccname[0] = '\0';

	if (type[0] == '\0') {
		return;
	}

	if (!strequal(type, "FILE") &&
	    !strequal(type, "WRFILE")) {
	    	DEBUG(10,("won't return krbccname for a %s type ccache\n", 
			type));
		return;
	}
	
	fstrcpy(state->response.data.auth.krb5ccname, cc);
}

#endif

static uid_t get_uid_from_state(struct winbindd_cli_state *state)
{
	uid_t uid = -1;

	uid = state->request.data.auth.uid;

	if (uid < 0) {
		DEBUG(1,("invalid uid: '%d'\n", uid));
		return -1;
	}
	return uid;
}

/**********************************************************************
 Authenticate a user with a clear text password using Kerberos and fill up
 ccache if required
 **********************************************************************/

static NTSTATUS winbindd_raw_kerberos_login(struct winbindd_domain *domain,
					    struct winbindd_cli_state *state,
					    NET_USER_INFO_3 **info3)
{
#ifdef HAVE_KRB5
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	krb5_error_code krb5_ret;
	const char *cc = NULL;
	const char *principal_s = NULL;
	const char *service = NULL;
	char *realm = NULL;
	fstring name_domain, name_user;
	time_t ticket_lifetime = 0;
	time_t renewal_until = 0;
	uid_t uid = -1;
	ADS_STRUCT *ads;
	time_t time_offset = 0;
	BOOL internal_ccache = True;

	ZERO_STRUCTP(info3);

	*info3 = NULL;
	
	/* 1st step: 
	 * prepare a krb5_cc_cache string for the user */

	uid = get_uid_from_state(state);
	if (uid == -1) {
		DEBUG(0,("no valid uid\n"));
	}

	cc = generate_krb5_ccache(state->mem_ctx,
				  state->request.data.auth.krb5_cc_type,
				  state->request.data.auth.uid, 
				  &internal_ccache);
	if (cc == NULL) {
		return NT_STATUS_NO_MEMORY;
	}


	/* 2nd step: 
	 * get kerberos properties */
	
	if (domain->private_data) {
		ads = (ADS_STRUCT *)domain->private_data;
		time_offset = ads->auth.time_offset; 
	}


	/* 3rd step: 
	 * do kerberos auth and setup ccache as the user */

	parse_domain_user(state->request.data.auth.user, name_domain, name_user);

	realm = domain->alt_name;
	strupper_m(realm);
	
	principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm); 
	if (principal_s == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
	if (service == NULL) {
		return NT_STATUS_NO_MEMORY;
	}

	/* if this is a user ccache, we need to act as the user to let the krb5
	 * library handle the chown, etc. */

	/************************ ENTERING NON-ROOT **********************/

	if (!internal_ccache) {
		set_effective_uid(uid);
		DEBUG(10,("winbindd_raw_kerberos_login: uid is %d\n", uid));
	}

	result = kerberos_return_info3_from_pac(state->mem_ctx,
						principal_s,
						state->request.data.auth.pass,
						time_offset,
						&ticket_lifetime,
						&renewal_until,
						cc,
						True,
						True,
						WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
						info3);
	if (!internal_ccache) {
		gain_root_privilege();
	}

	/************************ RETURNED TO ROOT **********************/

	if (!NT_STATUS_IS_OK(result)) {
		goto failed;
	}

	DEBUG(10,("winbindd_raw_kerberos_login: winbindd validated ticket of %s\n",
		principal_s));

	/* if we had a user's ccache then return that string for the pam
	 * environment */

	if (!internal_ccache) {
		
		setup_return_cc_name(state, cc);

		result = add_ccache_to_list(principal_s,
					    cc,
					    service,
					    state->request.data.auth.user,
					    realm,
					    uid,
					    time(NULL),
					    ticket_lifetime,
					    renewal_until, 
					    False);

		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(10,("winbindd_raw_kerberos_login: failed to add ccache to list: %s\n", 
				nt_errstr(result)));
		}
	} else {

		/* need to delete the memory cred cache, it is not used anymore */

		krb5_ret = ads_kdestroy(cc);
		if (krb5_ret) {
			DEBUG(3,("winbindd_raw_kerberos_login: "
				 "could not destroy krb5 credential cache: "
				 "%s\n", error_message(krb5_ret)));
		}

	}

	return NT_STATUS_OK;

failed:

	/* we could have created a new credential cache with a valid tgt in it
	 * but we werent able to get or verify the service ticket for this
	 * local host and therefor didn't get the PAC, we need to remove that
	 * cache entirely now */

	krb5_ret = ads_kdestroy(cc);
	if (krb5_ret) {
		DEBUG(3,("winbindd_raw_kerberos_login: "
			 "could not destroy krb5 credential cache: "
			 "%s\n", error_message(krb5_ret)));
	}

	if (!NT_STATUS_IS_OK(remove_ccache(state->request.data.auth.user))) {
		DEBUG(3,("winbindd_raw_kerberos_login: "
			  "could not remove ccache for user %s\n",
			state->request.data.auth.user));
	}

	return result;
#else
	return NT_STATUS_NOT_SUPPORTED;
#endif /* HAVE_KRB5 */
}

/****************************************************************
****************************************************************/

static BOOL check_request_flags(uint32_t flags)
{
	uint32_t flags_edata = WBFLAG_PAM_AFS_TOKEN |
			       WBFLAG_PAM_UNIX_NAME |
			       WBFLAG_PAM_INFO3_NDR;

	if ( ( (flags & flags_edata) == WBFLAG_PAM_AFS_TOKEN) ||
	     ( (flags & flags_edata) == WBFLAG_PAM_INFO3_NDR) ||
	     ( (flags & flags_edata) == WBFLAG_PAM_UNIX_NAME) ||
	      !(flags & flags_edata) ) {
		return True;
	}

	DEBUG(1,("check_request_flags: invalid request flags\n"));

	return False;
}

/****************************************************************
****************************************************************/

static NTSTATUS append_data(struct winbindd_cli_state *state,
			    NET_USER_INFO_3 *info3,
			    const char *name_domain,
			    const char *name_user)
{
	NTSTATUS result;
	uint32_t flags = state->request.flags;

	if (flags & WBFLAG_PAM_USER_SESSION_KEY) {
		memcpy(state->response.data.auth.user_session_key,
		       info3->user_sess_key,
		       sizeof(state->response.data.auth.user_session_key)
		       /* 16 */);
	}

	if (flags & WBFLAG_PAM_LMKEY) {
		memcpy(state->response.data.auth.first_8_lm_hash,
		       info3->lm_sess_key,
		       sizeof(state->response.data.auth.first_8_lm_hash)
		       /* 8 */);
	}

	if (flags & WBFLAG_PAM_INFO3_TEXT) {
		result = append_info3_as_txt(state->mem_ctx, state, info3);
		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(10,("Failed to append INFO3 (TXT): %s\n",
				nt_errstr(result)));
			return result;
		}
	}

	/* currently, anything from here on potentially overwrites extra_data. */

	if (flags & WBFLAG_PAM_INFO3_NDR) {
		result = append_info3_as_ndr(state->mem_ctx, state, info3);
		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(10,("Failed to append INFO3 (NDR): %s\n",
				nt_errstr(result)));
			return result;
		}
	}

	if (flags & WBFLAG_PAM_UNIX_NAME) {
		result = append_unix_username(state->mem_ctx, state, info3,
					      name_domain, name_user);
		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(10,("Failed to append Unix Username: %s\n",
				nt_errstr(result)));
			return result;
		}
	}

	if (flags & WBFLAG_PAM_AFS_TOKEN) {
		result = append_afs_token(state->mem_ctx, state, info3,
					  name_domain, name_user);
		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(10,("Failed to append AFS token: %s\n",
				nt_errstr(result)));
			return result;
		}
	}

	return NT_STATUS_OK;
}

void winbindd_pam_auth(struct winbindd_cli_state *state)
{
	struct winbindd_domain *domain;
	fstring name_domain, name_user;
	NTSTATUS result;

	/* Ensure null termination */
	state->request.data.auth.user
		[sizeof(state->request.data.auth.user)-1]='\0';

	/* Ensure null termination */
	state->request.data.auth.pass
		[sizeof(state->request.data.auth.pass)-1]='\0';

	DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)state->pid,
		  state->request.data.auth.user));

	if (!check_request_flags(state->request.flags)) {
		result = NT_STATUS_INVALID_PARAMETER_MIX;
		goto done;
	}

	/* Parse domain and username */
	
	ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR );

	if (!canonicalize_username(state->request.data.auth.user,
			       name_domain, name_user)) {
		result = NT_STATUS_NO_SUCH_USER;
		goto done;
	}

	domain = find_auth_domain(state, name_domain);

	if (domain == NULL) {
		result = NT_STATUS_NO_SUCH_USER;
		goto done;
	}

	sendto_domain(state, domain);
	return;
 done:
	set_auth_errors(&state->response, result);
	DEBUG(5, ("Plain text authentication for %s returned %s "
		  "(PAM: %d)\n",
		  state->request.data.auth.user,
		  state->response.data.auth.nt_status_string,
		  state->response.data.auth.pam_error));
	request_error(state);
}

NTSTATUS winbindd_dual_pam_auth_cached(struct winbindd_domain *domain,
				       struct winbindd_cli_state *state,
				       NET_USER_INFO_3 **info3)
{
	NTSTATUS result = NT_STATUS_LOGON_FAILURE;
	uint16 max_allowed_bad_attempts; 
	fstring name_domain, name_user;
	DOM_SID sid;
	enum lsa_SidType type;
	uchar new_nt_pass[NT_HASH_LEN];
	const uint8 *cached_nt_pass;
	const uint8 *cached_salt;
	NET_USER_INFO_3 *my_info3;
	time_t kickoff_time, must_change_time;
	BOOL password_good = False;
#ifdef HAVE_KRB5
	struct winbindd_tdc_domain *tdc_domain = NULL;
#endif

	*info3 = NULL;

	ZERO_STRUCTP(info3);

	DEBUG(10,("winbindd_dual_pam_auth_cached\n"));

	/* Parse domain and username */
	
	parse_domain_user(state->request.data.auth.user, name_domain, name_user);


	if (!lookup_cached_name(state->mem_ctx,
	                        name_domain,
				name_user,
				&sid,
				&type)) {
		DEBUG(10,("winbindd_dual_pam_auth_cached: no such user in the cache\n"));
		return NT_STATUS_NO_SUCH_USER;
	}

	if (type != SID_NAME_USER) {
		DEBUG(10,("winbindd_dual_pam_auth_cached: not a user (%s)\n", sid_type_lookup(type)));
		return NT_STATUS_LOGON_FAILURE;
	}

	result = winbindd_get_creds(domain, 
				    state->mem_ctx, 
				    &sid, 
				    &my_info3, 
				    &cached_nt_pass,
				    &cached_salt);
	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get creds: %s\n", nt_errstr(result)));
		return result;
	}

	*info3 = my_info3;

	E_md4hash(state->request.data.auth.pass, new_nt_pass);

	dump_data_pw("new_nt_pass", new_nt_pass, NT_HASH_LEN);
	dump_data_pw("cached_nt_pass", cached_nt_pass, NT_HASH_LEN);
	if (cached_salt) {
		dump_data_pw("cached_salt", cached_salt, NT_HASH_LEN);
	}

	if (cached_salt) {
		/* In this case we didn't store the nt_hash itself,
		   but the MD5 combination of salt + nt_hash. */
		uchar salted_hash[NT_HASH_LEN];
		E_md5hash(cached_salt, new_nt_pass, salted_hash);

		password_good = (memcmp(cached_nt_pass, salted_hash, NT_HASH_LEN) == 0) ?
			True : False;
	} else {
		/* Old cached cred - direct store of nt_hash (bad bad bad !). */
		password_good = (memcmp(cached_nt_pass, new_nt_pass, NT_HASH_LEN) == 0) ?
			True : False;
	}

	if (password_good) {

		/* User *DOES* know the password, update logon_time and reset
		 * bad_pw_count */
	
		my_info3->user_flgs |= LOGON_CACHED_ACCOUNT;
	
		if (my_info3->acct_flags & ACB_AUTOLOCK) {
			return NT_STATUS_ACCOUNT_LOCKED_OUT;
		}
	
		if (my_info3->acct_flags & ACB_DISABLED) {
			return NT_STATUS_ACCOUNT_DISABLED;
		}
	
		if (my_info3->acct_flags & ACB_WSTRUST) {
			return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
		}
	
		if (my_info3->acct_flags & ACB_SVRTRUST) {
			return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
		}
	
		if (my_info3->acct_flags & ACB_DOMTRUST) {
			return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
		}

		if (!(my_info3->acct_flags & ACB_NORMAL)) {
			DEBUG(0,("winbindd_dual_pam_auth_cached: whats wrong with that one?: 0x%08x\n", 
				my_info3->acct_flags));
			return NT_STATUS_LOGON_FAILURE;
		}

		kickoff_time = nt_time_to_unix(my_info3->kickoff_time);
		if (kickoff_time != 0 && time(NULL) > kickoff_time) {
			return NT_STATUS_ACCOUNT_EXPIRED;
		}

		must_change_time = nt_time_to_unix(my_info3->pass_must_change_time);
		if (must_change_time != 0 && must_change_time < time(NULL)) {
			/* we allow grace logons when the password has expired */
			my_info3->user_flgs |= LOGON_GRACE_LOGON;
			/* return NT_STATUS_PASSWORD_EXPIRED; */
			goto success;
		}
	
#ifdef HAVE_KRB5
		if ((state->request.flags & WBFLAG_PAM_KRB5) &&
		    ((tdc_domain = wcache_tdc_fetch_domain(state->mem_ctx, name_domain)) != NULL) &&
		    (tdc_domain->trust_type & DS_DOMAIN_TRUST_TYPE_UPLEVEL)) {

			uid_t uid = -1;
			const char *cc = NULL;
			char *realm = NULL;
			const char *principal_s = NULL;
			const char *service = NULL;
			BOOL internal_ccache = False;

			uid = get_uid_from_state(state);
			if (uid == -1) {
				DEBUG(0,("winbindd_dual_pam_auth_cached: invalid uid\n"));
				return NT_STATUS_INVALID_PARAMETER;
			}

			cc = generate_krb5_ccache(state->mem_ctx,
						state->request.data.auth.krb5_cc_type,
						state->request.data.auth.uid,
						&internal_ccache);
			if (cc == NULL) {
				return NT_STATUS_NO_MEMORY;
			}

			realm = domain->alt_name;
			strupper_m(realm);

			principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm);
			if (principal_s == NULL) {
				return NT_STATUS_NO_MEMORY;
			}

			service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
			if (service == NULL) {
				return NT_STATUS_NO_MEMORY;
			}

			if (!internal_ccache) {

				setup_return_cc_name(state, cc);

				result = add_ccache_to_list(principal_s,
							    cc,
							    service,
							    state->request.data.auth.user,
							    domain->alt_name,
							    uid,
							    time(NULL),
							    time(NULL) + lp_winbind_cache_time(),
							    time(NULL) + WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
							    True);

				if (!NT_STATUS_IS_OK(result)) {
					DEBUG(10,("winbindd_dual_pam_auth_cached: failed "
						"to add ccache to list: %s\n",
						nt_errstr(result)));
				}
			}
		}
#endif /* HAVE_KRB5 */
 success:
		/* FIXME: we possibly should handle logon hours as well (does xp when
		 * offline?) see auth/auth_sam.c:sam_account_ok for details */

		unix_to_nt_time(&my_info3->logon_time, time(NULL));
		my_info3->bad_pw_count = 0;

		result = winbindd_update_creds_by_info3(domain,
							state->mem_ctx,
							state->request.data.auth.user,
							state->request.data.auth.pass,
							my_info3);
		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(1,("winbindd_dual_pam_auth_cached: failed to update creds: %s\n",
				nt_errstr(result)));
			return result;
		}

		return NT_STATUS_OK;

	}

	/* User does *NOT* know the correct password, modify info3 accordingly */

	/* failure of this is not critical */
	result = get_max_bad_attempts_from_lockout_policy(domain, state->mem_ctx, &max_allowed_bad_attempts);
	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get max_allowed_bad_attempts. "
			  "Won't be able to honour account lockout policies\n"));
	}

	/* increase counter */
	my_info3->bad_pw_count++;

	if (max_allowed_bad_attempts == 0) {
		goto failed;
	}

	/* lockout user */
	if (my_info3->bad_pw_count >= max_allowed_bad_attempts) {

		uint32 password_properties;

		result = get_pwd_properties(domain, state->mem_ctx, &password_properties);
		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get password properties.\n"));
		}

		if ((my_info3->user_rid != DOMAIN_USER_RID_ADMIN) || 
		    (password_properties & DOMAIN_LOCKOUT_ADMINS)) {
			my_info3->acct_flags |= ACB_AUTOLOCK;
		}
	}

failed:
	result = winbindd_update_creds_by_info3(domain,
						state->mem_ctx,
						state->request.data.auth.user,
						NULL,
						my_info3);

	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(0,("winbindd_dual_pam_auth_cached: failed to update creds %s\n", 
			nt_errstr(result)));
	}

	return NT_STATUS_LOGON_FAILURE;
}

NTSTATUS winbindd_dual_pam_auth_kerberos(struct winbindd_domain *domain,
					 struct winbindd_cli_state *state, 
					 NET_USER_INFO_3 **info3)
{
	struct winbindd_domain *contact_domain;
	fstring name_domain, name_user;
	NTSTATUS result;

	DEBUG(10,("winbindd_dual_pam_auth_kerberos\n"));
	
	/* Parse domain and username */
	
	parse_domain_user(state->request.data.auth.user, name_domain, name_user);

	/* what domain should we contact? */
	
	if ( IS_DC ) {
		if (!(contact_domain = find_domain_from_name(name_domain))) {
			DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n", 
				  state->request.data.auth.user, name_domain, name_user, name_domain)); 
			result = NT_STATUS_NO_SUCH_USER;
			goto done;
		}
		
	} else {
		if (is_myname(name_domain)) {
			DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
			result =  NT_STATUS_NO_SUCH_USER;
			goto done;
		}
		
		contact_domain = find_domain_from_name(name_domain);
		if (contact_domain == NULL) {
			DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n", 
				  state->request.data.auth.user, name_domain, name_user, name_domain)); 

			contact_domain = find_our_domain();
		}
	}

	if (contact_domain->initialized && 
	    contact_domain->active_directory) {
	    	goto try_login;
	}

	if (!contact_domain->initialized) {
		init_dc_connection(contact_domain);
	}

	if (!contact_domain->active_directory) {
		DEBUG(3,("krb5 auth requested but domain is not Active Directory\n"));
		return NT_STATUS_INVALID_LOGON_TYPE;
	}
try_login:
	result = winbindd_raw_kerberos_login(contact_domain, state, info3);
done:
	return result;
}

NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain,
					 struct winbindd_cli_state *state,
					 NET_USER_INFO_3 **info3)
{

	struct rpc_pipe_client *netlogon_pipe;
	uchar chal[8];
	DATA_BLOB lm_resp;
	DATA_BLOB nt_resp;
	int attempts = 0;
	unsigned char local_lm_response[24];
	unsigned char local_nt_response[24];
	struct winbindd_domain *contact_domain;
	fstring name_domain, name_user;
	BOOL retry;
	NTSTATUS result;
	NET_USER_INFO_3 *my_info3;

	ZERO_STRUCTP(info3);

	*info3 = NULL;

	my_info3 = TALLOC_ZERO_P(state->mem_ctx, NET_USER_INFO_3);
	if (my_info3 == NULL) {
		return NT_STATUS_NO_MEMORY;
	}


	DEBUG(10,("winbindd_dual_pam_auth_samlogon\n"));
	
	/* Parse domain and username */
	
	parse_domain_user(state->request.data.auth.user, name_domain, name_user);

	/* do password magic */
	

	generate_random_buffer(chal, 8);
	if (lp_client_ntlmv2_auth()) {
		DATA_BLOB server_chal;
		DATA_BLOB names_blob;
		DATA_BLOB nt_response;
		DATA_BLOB lm_response;
		server_chal = data_blob_talloc(state->mem_ctx, chal, 8); 
		
		/* note that the 'workgroup' here is a best guess - we don't know
		   the server's domain at this point.  The 'server name' is also
		   dodgy... 
		*/
		names_blob = NTLMv2_generate_names_blob(global_myname(), lp_workgroup());
		
		if (!SMBNTLMv2encrypt(name_user, name_domain, 
				      state->request.data.auth.pass, 
				      &server_chal, 
				      &names_blob,
				      &lm_response, &nt_response, NULL)) {
			data_blob_free(&names_blob);
			data_blob_free(&server_chal);
			DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n"));
			result = NT_STATUS_NO_MEMORY;
			goto done;
		}
		data_blob_free(&names_blob);
		data_blob_free(&server_chal);
		lm_resp = data_blob_talloc(state->mem_ctx, lm_response.data,
					   lm_response.length);
		nt_resp = data_blob_talloc(state->mem_ctx, nt_response.data,
					   nt_response.length);
		data_blob_free(&lm_response);
		data_blob_free(&nt_response);

	} else {
		if (lp_client_lanman_auth() 
		    && SMBencrypt(state->request.data.auth.pass, 
				  chal, 
				  local_lm_response)) {
			lm_resp = data_blob_talloc(state->mem_ctx, 
						   local_lm_response, 
						   sizeof(local_lm_response));
		} else {
			lm_resp = data_blob_null;
		}
		SMBNTencrypt(state->request.data.auth.pass, 
			     chal,
			     local_nt_response);

		nt_resp = data_blob_talloc(state->mem_ctx, 
					   local_nt_response, 
					   sizeof(local_nt_response));
	}
	
	/* what domain should we contact? */
	
	if ( IS_DC ) {
		if (!(contact_domain = find_domain_from_name(name_domain))) {
			DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n", 
				  state->request.data.auth.user, name_domain, name_user, name_domain)); 
			result = NT_STATUS_NO_SUCH_USER;
			goto done;
		}
		
	} else {
		if (is_myname(name_domain)) {
			DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
			result =  NT_STATUS_NO_SUCH_USER;
			goto done;
		}

		contact_domain = find_our_domain();
	}

	/* check authentication loop */

	do {
		NTSTATUS (*logon_fn)(struct rpc_pipe_client
				     *cli, TALLOC_CTX *mem_ctx,
				     uint32 logon_parameters,
				     const char *server,
				     const char *username,
				     const char *domain,
				     const char *workstation, 
				     const uint8 chal[8], 
				     DATA_BLOB lm_response,
				     DATA_BLOB nt_response,
				     NET_USER_INFO_3 *info3);

		ZERO_STRUCTP(my_info3);
		retry = False;

		result = cm_connect_netlogon(contact_domain, &netlogon_pipe);

		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
			goto done;
		}

		logon_fn = contact_domain->can_do_samlogon_ex
			? rpccli_netlogon_sam_network_logon_ex
			: rpccli_netlogon_sam_network_logon;

		result = logon_fn(netlogon_pipe,
							   state->mem_ctx,
							   0,
							   contact_domain->dcname, /* server name */
							   name_user,              /* user name */
							   name_domain,            /* target domain */
							   global_myname(),        /* workstation */
							   chal,
							   lm_resp,
							   nt_resp,
							   my_info3);

		if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
		    && contact_domain->can_do_samlogon_ex) {
			DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
				  "retrying with NetSamLogon\n"));
			contact_domain->can_do_samlogon_ex = False;
			retry = True;
			continue;
		}
			
		attempts += 1;

		/* We have to try a second time as cm_connect_netlogon
		   might not yet have noticed that the DC has killed
		   our connection. */

		if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
			retry = True;
			continue;
		}
		
		/* if we get access denied, a possible cause was that we had
		   and open connection to the DC, but someone changed our
		   machine account password out from underneath us using 'net
		   rpc changetrustpw' */
		   
		if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
			DEBUG(3,("winbindd_pam_auth: sam_logon returned "
				 "ACCESS_DENIED.  Maybe the trust account "
				"password was changed and we didn't know it. "
				 "Killing connections to domain %s\n",
				name_domain));
			invalidate_cm_connection(&contact_domain->conn);
			retry = True;
		} 
		
	} while ( (attempts < 2) && retry );

	/* handle the case where a NT4 DC does not fill in the acct_flags in
	 * the samlogon reply info3. When accurate info3 is required by the
	 * caller, we look up the account flags ourselve - gd */

	if ((state->request.flags & WBFLAG_PAM_INFO3_TEXT) && 
	    (my_info3->acct_flags == 0) && NT_STATUS_IS_OK(result)) {

		struct rpc_pipe_client *samr_pipe;
		POLICY_HND samr_domain_handle, user_pol;
		SAM_USERINFO_CTR *user_ctr;
		NTSTATUS status_tmp;
		uint32 acct_flags;

		ZERO_STRUCT(user_ctr);

		status_tmp = cm_connect_sam(contact_domain, state->mem_ctx, 
					    &samr_pipe, &samr_domain_handle);

		if (!NT_STATUS_IS_OK(status_tmp)) {
			DEBUG(3, ("could not open handle to SAMR pipe: %s\n", 
				nt_errstr(status_tmp)));
			goto done;
		}

		status_tmp = rpccli_samr_open_user(samr_pipe, state->mem_ctx, 
						   &samr_domain_handle,
						   MAXIMUM_ALLOWED_ACCESS,
						   my_info3->user_rid, &user_pol);

		if (!NT_STATUS_IS_OK(status_tmp)) {
			DEBUG(3, ("could not open user handle on SAMR pipe: %s\n",
				nt_errstr(status_tmp)));
			goto done;
		}

		status_tmp = rpccli_samr_query_userinfo(samr_pipe, state->mem_ctx, 
							&user_pol, 16, &user_ctr);

		if (!NT_STATUS_IS_OK(status_tmp)) {
			DEBUG(3, ("could not query user info on SAMR pipe: %s\n",
				nt_errstr(status_tmp)));
			rpccli_samr_close(samr_pipe, state->mem_ctx, &user_pol);
			goto done;
		}

		acct_flags = user_ctr->info.id16->acb_info;

		if (acct_flags == 0) {
			rpccli_samr_close(samr_pipe, state->mem_ctx, &user_pol);
			goto done;
		}

		my_info3->acct_flags = acct_flags;

		DEBUG(10,("successfully retrieved acct_flags 0x%x\n", acct_flags));

		rpccli_samr_close(samr_pipe, state->mem_ctx, &user_pol);
	}

	*info3 = my_info3;
done:
	return result;
}

enum winbindd_result winbindd_dual_pam_auth(struct winbindd_domain *domain,
					    struct winbindd_cli_state *state) 
{
	NTSTATUS result = NT_STATUS_LOGON_FAILURE;
	NTSTATUS krb5_result = NT_STATUS_OK;	
	fstring name_domain, name_user;
	NET_USER_INFO_3 *info3 = NULL;
	
	/* Ensure null termination */
	state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';

	/* Ensure null termination */
	state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';

	DEBUG(3, ("[%5lu]: dual pam auth %s\n", (unsigned long)state->pid,
		  state->request.data.auth.user));

	if (!check_request_flags(state->request.flags)) {
		result = NT_STATUS_INVALID_PARAMETER_MIX;
		goto done;
	}

	/* Parse domain and username */
	
	ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR );

	parse_domain_user(state->request.data.auth.user, name_domain, name_user);

	if (domain->online == False) {
		result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
		if (domain->startup) {
			/* Logons are very important to users. If we're offline and
			   we get a request within the first 30 seconds of startup,
			   try very hard to find a DC and go online. */

			DEBUG(10,("winbindd_dual_pam_auth: domain: %s offline and auth "
				"request in startup mode.\n", domain->name ));

			winbindd_flush_negative_conn_cache(domain);
			result = init_dc_connection(domain);
		}
	}

	DEBUG(10,("winbindd_dual_pam_auth: domain: %s last was %s\n", domain->name, domain->online ? "online":"offline"));

	/* Check for Kerberos authentication */
	if (domain->online && (state->request.flags & WBFLAG_PAM_KRB5)) {
	
		result = winbindd_dual_pam_auth_kerberos(domain, state, &info3);
		/* save for later */
		krb5_result = result;
		

		if (NT_STATUS_IS_OK(result)) {
			DEBUG(10,("winbindd_dual_pam_auth_kerberos succeeded\n"));
			goto process_result;
		} else {
			DEBUG(10,("winbindd_dual_pam_auth_kerberos failed: %s\n", nt_errstr(result)));
		}

		if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
			DEBUG(10,("winbindd_dual_pam_auth_kerberos setting domain to offline\n"));
			set_domain_offline( domain );
			goto cached_logon;			
		}

		/* there are quite some NT_STATUS errors where there is no
		 * point in retrying with a samlogon, we explictly have to take
		 * care not to increase the bad logon counter on the DC */

		if (NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_DISABLED) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_EXPIRED) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_LOCKED_OUT) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_INVALID_LOGON_HOURS) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_INVALID_WORKSTATION) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_LOGON_FAILURE) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_WRONG_PASSWORD)) {
			goto process_result;
		}
		
		if (state->request.flags & WBFLAG_PAM_FALLBACK_AFTER_KRB5) {
			DEBUG(3,("falling back to samlogon\n"));
			goto sam_logon;
		} else {
			goto cached_logon;
		}
	}

sam_logon:
	/* Check for Samlogon authentication */
	if (domain->online) {
		result = winbindd_dual_pam_auth_samlogon(domain, state, &info3);
	
		if (NT_STATUS_IS_OK(result)) {
			DEBUG(10,("winbindd_dual_pam_auth_samlogon succeeded\n"));
			/* add the Krb5 err if we have one */
			if ( NT_STATUS_EQUAL(krb5_result, NT_STATUS_TIME_DIFFERENCE_AT_DC ) ) {
				info3->user_flgs |= LOGON_KRB5_FAIL_CLOCK_SKEW;				
			}
			goto process_result;
		} 

       		DEBUG(10,("winbindd_dual_pam_auth_samlogon failed: %s\n", 
			  nt_errstr(result)));

		if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
		    NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) 
		{
			DEBUG(10,("winbindd_dual_pam_auth_samlogon setting domain to offline\n"));
			set_domain_offline( domain );
			goto cached_logon;			
		}

			if (domain->online) {
				/* We're still online - fail. */
				goto done;
			}
	}

cached_logon:
	/* Check for Cached logons */
	if (!domain->online && (state->request.flags & WBFLAG_PAM_CACHED_LOGIN) && 
	    lp_winbind_offline_logon()) {
	
		result = winbindd_dual_pam_auth_cached(domain, state, &info3);

		if (NT_STATUS_IS_OK(result)) {
			DEBUG(10,("winbindd_dual_pam_auth_cached succeeded\n"));
			goto process_result;
		} else {
			DEBUG(10,("winbindd_dual_pam_auth_cached failed: %s\n", nt_errstr(result)));
			goto done;
		}
	}

process_result:

	if (NT_STATUS_IS_OK(result)) {
	
		DOM_SID user_sid;

		/* In all codepaths where result == NT_STATUS_OK info3 must have
		   been initialized. */
		if (!info3) {
			result = NT_STATUS_INTERNAL_ERROR;
			goto done;
		}

		netsamlogon_cache_store(name_user, info3);
		wcache_invalidate_samlogon(find_domain_from_name(name_domain), info3);

		/* save name_to_sid info as early as possible (only if
		   this is our primary domain so we don't invalidate
		   the cache entry by storing the seq_num for the wrong
		   domain). */
		if ( domain->primary ) {			
			sid_compose(&user_sid, &info3->dom_sid.sid, 
				    info3->user_rid);
			cache_name2sid(domain, name_domain, name_user, 
				       SID_NAME_USER, &user_sid);
		}
		
		/* Check if the user is in the right group */

		if (!NT_STATUS_IS_OK(result = check_info3_in_group(state->mem_ctx, info3,
					state->request.data.auth.require_membership_of_sid))) {
			DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
				  state->request.data.auth.user, 
				  state->request.data.auth.require_membership_of_sid));
			goto done;
		}

		result = append_data(state, info3, name_domain, name_user);
		if (!NT_STATUS_IS_OK(result)) {
			goto done;
		}

		if ((state->request.flags & WBFLAG_PAM_CACHED_LOGIN)) {

			/* Store in-memory creds for single-signon using ntlm_auth. */
			result = winbindd_add_memory_creds(state->request.data.auth.user,
							get_uid_from_state(state),
							state->request.data.auth.pass);

			if (!NT_STATUS_IS_OK(result)) {
				DEBUG(10,("Failed to store memory creds: %s\n", nt_errstr(result)));
				goto done;
			}

			if (lp_winbind_offline_logon()) {
				result = winbindd_store_creds(domain,
						      state->mem_ctx,
						      state->request.data.auth.user,
						      state->request.data.auth.pass,
						      info3, NULL);
				if (!NT_STATUS_IS_OK(result)) {

					/* Release refcount. */
					winbindd_delete_memory_creds(state->request.data.auth.user);

					DEBUG(10,("Failed to store creds: %s\n", nt_errstr(result)));
					goto done;
				}
			}
		}

		result = fillup_password_policy(domain, state);

		if (!NT_STATUS_IS_OK(result) 
		    && !NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED) ) 
		{
			DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(result)));
			goto done;
		}

		result = NT_STATUS_OK;		
	}

done:
	/* give us a more useful (more correct?) error code */
	if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
	    (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
		result = NT_STATUS_NO_LOGON_SERVERS;
	}
	
	state->response.data.auth.nt_status = NT_STATUS_V(result);
	fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));

	/* we might have given a more useful error above */
	if (!*state->response.data.auth.error_string) 
		fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
	state->response.data.auth.pam_error = nt_status_to_pam(result);

	DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n", 
	      state->request.data.auth.user, 
	      state->response.data.auth.nt_status_string,
	      state->response.data.auth.pam_error));	      

	return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}


/**********************************************************************
 Challenge Response Authentication Protocol 
**********************************************************************/

void winbindd_pam_auth_crap(struct winbindd_cli_state *state)
{
	struct winbindd_domain *domain = NULL;
	const char *domain_name = NULL;
	NTSTATUS result;

	if (!check_request_flags(state->request.flags)) {
		result = NT_STATUS_INVALID_PARAMETER_MIX;
		goto done;
	}

	if (!state->privileged) {
		char *error_string = NULL;
		DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access "
			  "denied.  !\n"));
		DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions "
			     "on %s are set correctly.\n",
			     get_winbind_priv_pipe_dir()));
		/* send a better message than ACCESS_DENIED */
		error_string = talloc_asprintf(state->mem_ctx,
					       "winbind client not authorized "
					       "to use winbindd_pam_auth_crap."
					       " Ensure permissions on %s "
					       "are set correctly.",
					       get_winbind_priv_pipe_dir());
		fstrcpy(state->response.data.auth.error_string, error_string);
		result = NT_STATUS_ACCESS_DENIED;
		goto done;
	}

	/* Ensure null termination */
	state->request.data.auth_crap.user
		[sizeof(state->request.data.auth_crap.user)-1]=0;
	state->request.data.auth_crap.domain
		[sizeof(state->request.data.auth_crap.domain)-1]=0;

	DEBUG(3, ("[%5lu]: pam auth crap domain: [%s] user: %s\n",
		  (unsigned long)state->pid,
		  state->request.data.auth_crap.domain,
		  state->request.data.auth_crap.user));

	if (*state->request.data.auth_crap.domain != '\0') {
		domain_name = state->request.data.auth_crap.domain;
	} else if (lp_winbind_use_default_domain()) {
		domain_name = lp_workgroup();
	}

	if (domain_name != NULL)
		domain = find_auth_domain(state, domain_name);

	if (domain != NULL) {
		sendto_domain(state, domain);
		return;
	}

	result = NT_STATUS_NO_SUCH_USER;

 done:
	set_auth_errors(&state->response, result);
	DEBUG(5, ("CRAP authentication for %s\\%s returned %s (PAM: %d)\n",
		  state->request.data.auth_crap.domain,
		  state->request.data.auth_crap.user, 
		  state->response.data.auth.nt_status_string,
		  state->response.data.auth.pam_error));
	request_error(state);
	return;
}


enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
						 struct winbindd_cli_state *state) 
{
	NTSTATUS result;
        NET_USER_INFO_3 info3;
	struct rpc_pipe_client *netlogon_pipe;
	const char *name_user = NULL;
	const char *name_domain = NULL;
	const char *workstation;
	struct winbindd_domain *contact_domain;
	int attempts = 0;
	BOOL retry;

	DATA_BLOB lm_resp, nt_resp;

	/* This is child-only, so no check for privileged access is needed
	   anymore */

	/* Ensure null termination */
	state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
	state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]=0;

	if (!check_request_flags(state->request.flags)) {
		result = NT_STATUS_INVALID_PARAMETER_MIX;
		goto done;
	}

	name_user = state->request.data.auth_crap.user;

	if (*state->request.data.auth_crap.domain) {
		name_domain = state->request.data.auth_crap.domain;
	} else if (lp_winbind_use_default_domain()) {
		name_domain = lp_workgroup();
	} else {
		DEBUG(5,("no domain specified with username (%s) - failing auth\n", 
			 name_user));
		result = NT_STATUS_NO_SUCH_USER;
		goto done;
	}

	DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
		  name_domain, name_user));
	   
	if (*state->request.data.auth_crap.workstation) {
		workstation = state->request.data.auth_crap.workstation;
	} else {
		workstation = global_myname();
	}

	if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
		|| state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
		DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n", 
			  state->request.data.auth_crap.lm_resp_len, 
			  state->request.data.auth_crap.nt_resp_len));
		result = NT_STATUS_INVALID_PARAMETER;
		goto done;
	}

	lm_resp = data_blob_talloc(state->mem_ctx, state->request.data.auth_crap.lm_resp,
					state->request.data.auth_crap.lm_resp_len);
	nt_resp = data_blob_talloc(state->mem_ctx, state->request.data.auth_crap.nt_resp,
					state->request.data.auth_crap.nt_resp_len);

	/* what domain should we contact? */
	
	if ( IS_DC ) {
		if (!(contact_domain = find_domain_from_name(name_domain))) {
			DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n", 
				  state->request.data.auth_crap.user, name_domain, name_user, name_domain)); 
			result = NT_STATUS_NO_SUCH_USER;
			goto done;
		}
	} else {
		if (is_myname(name_domain)) {
			DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
			result =  NT_STATUS_NO_SUCH_USER;
			goto done;
		}
		contact_domain = find_our_domain();
	}

	do {
		NTSTATUS (*logon_fn)(struct rpc_pipe_client
				     *cli, TALLOC_CTX *mem_ctx,
				     uint32 logon_parameters,
				     const char *server,
				     const char *username,
				     const char *domain,
				     const char *workstation, 
				     const uint8 chal[8], 
				     DATA_BLOB lm_response,
				     DATA_BLOB nt_response,
				     NET_USER_INFO_3 *info3);

		ZERO_STRUCT(info3);
		retry = False;

		netlogon_pipe = NULL;
		result = cm_connect_netlogon(contact_domain, &netlogon_pipe);

		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
				  nt_errstr(result)));
			goto done;
		}

		logon_fn = contact_domain->can_do_samlogon_ex
			? rpccli_netlogon_sam_network_logon_ex
			: rpccli_netlogon_sam_network_logon;

		result = logon_fn(netlogon_pipe,
							   state->mem_ctx,
							   state->request.data.auth_crap.logon_parameters,
							   contact_domain->dcname,
							   name_user,
							   name_domain, 
									/* Bug #3248 - found by Stefan Burkei. */
							   workstation, /* We carefully set this above so use it... */
							   state->request.data.auth_crap.chal,
							   lm_resp,
							   nt_resp,
							   &info3);

		if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
		    && contact_domain->can_do_samlogon_ex) {
			DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
				  "retrying with NetSamLogon\n"));
			contact_domain->can_do_samlogon_ex = False;
			retry = True;
			continue;
		}
			
		attempts += 1;

		/* We have to try a second time as cm_connect_netlogon
		   might not yet have noticed that the DC has killed
		   our connection. */

		if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
			retry = True;
			continue;
		}

		/* if we get access denied, a possible cause was that we had and open
		   connection to the DC, but someone changed our machine account password
		   out from underneath us using 'net rpc changetrustpw' */
		   
		if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
			DEBUG(3,("winbindd_pam_auth: sam_logon returned "
				 "ACCESS_DENIED.  Maybe the trust account "
				"password was changed and we didn't know it. "
				 "Killing connections to domain %s\n",
				name_domain));
			invalidate_cm_connection(&contact_domain->conn);
			retry = True;
		} 

	} while ( (attempts < 2) && retry );

	if (NT_STATUS_IS_OK(result)) {

		netsamlogon_cache_store(name_user, &info3);
		wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);

		/* Check if the user is in the right group */

		if (!NT_STATUS_IS_OK(result = check_info3_in_group(state->mem_ctx, &info3,
							state->request.data.auth_crap.require_membership_of_sid))) {
			DEBUG(3, ("User %s is not in the required group (%s), so "
				  "crap authentication is rejected\n",
				  state->request.data.auth_crap.user, 
				  state->request.data.auth_crap.require_membership_of_sid));
			goto done;
		}

		result = append_data(state, &info3, name_domain, name_user);
		if (!NT_STATUS_IS_OK(result)) {
			goto done;
		}
	}

done:

	/* give us a more useful (more correct?) error code */
	if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
	    (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
		result = NT_STATUS_NO_LOGON_SERVERS;
	}

	if (state->request.flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
		result = nt_status_squash(result);
	}

	state->response.data.auth.nt_status = NT_STATUS_V(result);
	fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));

	/* we might have given a more useful error above */
	if (!*state->response.data.auth.error_string) {
		fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
	}
	state->response.data.auth.pam_error = nt_status_to_pam(result);

	DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, 
	      ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n", 
	       name_domain,
	       name_user,
	       state->response.data.auth.nt_status_string,
	       state->response.data.auth.pam_error));	      

	return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}

/* Change a user password */

void winbindd_pam_chauthtok(struct winbindd_cli_state *state)
{
	fstring domain, user;
	struct winbindd_domain *contact_domain;

	DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
		state->request.data.chauthtok.user));

	/* Setup crap */

	ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR );

	if (!canonicalize_username(state->request.data.chauthtok.user, domain, user)) {
		set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER);
		DEBUG(5, ("winbindd_pam_chauthtok: canonicalize_username %s failed with %s"
			  "(PAM: %d)\n",
			  state->request.data.auth.user, 
			  state->response.data.auth.nt_status_string,
			  state->response.data.auth.pam_error));
		request_error(state);
		return;
	}

	contact_domain = find_domain_from_name(domain);
	if (!contact_domain) {
		set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER);
		DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n", 
			  state->request.data.chauthtok.user, domain, user, domain)); 
		request_error(state);
		return;
	}

	sendto_domain(state, contact_domain);
}

enum winbindd_result winbindd_dual_pam_chauthtok(struct winbindd_domain *contact_domain,
						 struct winbindd_cli_state *state)
{
	char *oldpass;
	char *newpass = NULL;
	POLICY_HND dom_pol;
	struct rpc_pipe_client *cli;
	BOOL got_info = False;
	SAM_UNK_INFO_1 info;
	SAMR_CHANGE_REJECT reject;
	NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
	fstring domain, user;

	DEBUG(3, ("[%5lu]: dual pam chauthtok %s\n", (unsigned long)state->pid,
		  state->request.data.auth.user));

	if (!parse_domain_user(state->request.data.chauthtok.user, domain, user)) {
		goto done;
	}

	/* Change password */

	oldpass = state->request.data.chauthtok.oldpass;
	newpass = state->request.data.chauthtok.newpass;

	/* Initialize reject reason */
	state->response.data.auth.reject_reason = Undefined;

	/* Get sam handle */

	result = cm_connect_sam(contact_domain, state->mem_ctx, &cli,
				&dom_pol);
	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
		goto done;
	}

	result = rpccli_samr_chgpasswd3(cli, state->mem_ctx, user, newpass, oldpass, &info, &reject);

 	/* Windows 2003 returns NT_STATUS_PASSWORD_RESTRICTION */

	if (NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_RESTRICTION) ) {
		state->response.data.auth.policy.min_length_password = 
			info.min_length_password;
		state->response.data.auth.policy.password_history = 
			info.password_history;
		state->response.data.auth.policy.password_properties = 
			info.password_properties;
		state->response.data.auth.policy.expire = 
			nt_time_to_unix_abs(&info.expire);
		state->response.data.auth.policy.min_passwordage = 
			nt_time_to_unix_abs(&info.min_passwordage);

		state->response.data.auth.reject_reason = 
			reject.reject_reason;

		got_info = True;
	}

	/* only fallback when the chgpasswd3 call is not supported */
	if ((NT_STATUS_EQUAL(result, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR))) ||
		   (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) ||
		   (NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED))) {

		DEBUG(10,("Password change with chgpasswd3 failed with: %s, retrying chgpasswd_user\n", 
			nt_errstr(result)));
		
		result = rpccli_samr_chgpasswd_user(cli, state->mem_ctx, user, newpass, oldpass);

		/* Windows 2000 returns NT_STATUS_ACCOUNT_RESTRICTION.
		   Map to the same status code as Windows 2003. */

		if ( NT_STATUS_EQUAL(NT_STATUS_ACCOUNT_RESTRICTION, result ) ) {
			result = NT_STATUS_PASSWORD_RESTRICTION;			
		}
	}

done: 

	if (NT_STATUS_IS_OK(result) && (state->request.flags & WBFLAG_PAM_CACHED_LOGIN)) {
		
		/* Update the single sign-on memory creds. */
		result = winbindd_replace_memory_creds(state->request.data.chauthtok.user,
							newpass);

		if (!NT_STATUS_IS_OK(result)) {
			DEBUG(10,("Failed to replace memory creds: %s\n", nt_errstr(result)));
			goto process_result;
		}

		if (lp_winbind_offline_logon()) {
			result = winbindd_update_creds_by_name(contact_domain,
							 state->mem_ctx, user,
							 newpass);
			if (!NT_STATUS_IS_OK(result)) {
				DEBUG(10,("Failed to store creds: %s\n", nt_errstr(result)));
				goto process_result;
			}
		}
	}		

	if (!NT_STATUS_IS_OK(result) && !got_info && contact_domain) {

		NTSTATUS policy_ret;
		
		policy_ret = fillup_password_policy(contact_domain, state);

		/* failure of this is non critical, it will just provide no
		 * additional information to the client why the change has
		 * failed - Guenther */

		if (!NT_STATUS_IS_OK(policy_ret)) {
			DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(policy_ret)));
			goto process_result;
		}
	}

process_result:

	state->response.data.auth.nt_status = NT_STATUS_V(result);
	fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
	fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
	state->response.data.auth.pam_error = nt_status_to_pam(result);

	DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, 
	      ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n", 
	       domain,
	       user,
	       state->response.data.auth.nt_status_string,
	       state->response.data.auth.pam_error));	      

	return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}

void winbindd_pam_logoff(struct winbindd_cli_state *state)
{
	struct winbindd_domain *domain;
	fstring name_domain, user;
	uid_t caller_uid = (uid_t)-1;
	uid_t request_uid = state->request.data.logoff.uid;

	DEBUG(3, ("[%5lu]: pam logoff %s\n", (unsigned long)state->pid,
		state->request.data.logoff.user));

	/* Ensure null termination */
	state->request.data.logoff.user
		[sizeof(state->request.data.logoff.user)-1]='\0';

	state->request.data.logoff.krb5ccname
		[sizeof(state->request.data.logoff.krb5ccname)-1]='\0';

	if (request_uid == (gid_t)-1) {
		goto failed;
	}

	if (!canonicalize_username(state->request.data.logoff.user, name_domain, user)) {
		goto failed;
	}

	if ((domain = find_auth_domain(state, name_domain)) == NULL) {
		goto failed;
	}

	if ((sys_getpeereid(state->sock, &caller_uid)) != 0) {
		DEBUG(1,("winbindd_pam_logoff: failed to check peerid: %s\n", 
			strerror(errno)));
		goto failed;
	}

	switch (caller_uid) {
		case -1:
			goto failed;
		case 0:
			/* root must be able to logoff any user - gd */
			state->request.data.logoff.uid = request_uid;
			break;
		default:
			if (caller_uid != request_uid) {
				DEBUG(1,("winbindd_pam_logoff: caller requested invalid uid\n"));
				goto failed;
			}
			state->request.data.logoff.uid = caller_uid;
			break;
	}

	sendto_domain(state, domain);
	return;

 failed:
	set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER);
	DEBUG(5, ("Pam Logoff for %s returned %s "
		  "(PAM: %d)\n",
		  state->request.data.logoff.user,
		  state->response.data.auth.nt_status_string,
		  state->response.data.auth.pam_error));
	request_error(state);
	return;
}

enum winbindd_result winbindd_dual_pam_logoff(struct winbindd_domain *domain,
					      struct winbindd_cli_state *state) 
{
	NTSTATUS result = NT_STATUS_NOT_SUPPORTED;

	DEBUG(3, ("[%5lu]: pam dual logoff %s\n", (unsigned long)state->pid,
		state->request.data.logoff.user));

	if (!(state->request.flags & WBFLAG_PAM_KRB5)) {
		result = NT_STATUS_OK;
		goto process_result;
	}

	if (state->request.data.logoff.krb5ccname[0] == '\0') {
		result = NT_STATUS_OK;
		goto process_result;
	}

#ifdef HAVE_KRB5
	
	if (state->request.data.logoff.uid < 0) {
		DEBUG(0,("winbindd_pam_logoff: invalid uid\n"));
		goto process_result;
	}

	/* what we need here is to find the corresponding krb5 ccache name *we*
	 * created for a given username and destroy it */

	if (!ccache_entry_exists(state->request.data.logoff.user)) {
		result = NT_STATUS_OK;
		DEBUG(10,("winbindd_pam_logoff: no entry found.\n"));
		goto process_result;
	}

	if (!ccache_entry_identical(state->request.data.logoff.user, 
					state->request.data.logoff.uid,
					state->request.data.logoff.krb5ccname)) {
		DEBUG(0,("winbindd_pam_logoff: cached entry differs.\n"));
		goto process_result;
	}

	result = remove_ccache(state->request.data.logoff.user);
	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(0,("winbindd_pam_logoff: failed to remove ccache: %s\n",
			nt_errstr(result)));
		goto process_result;
	}

#else
	result = NT_STATUS_NOT_SUPPORTED;
#endif

process_result:

	winbindd_delete_memory_creds(state->request.data.logoff.user);

	state->response.data.auth.nt_status = NT_STATUS_V(result);
	fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
	fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
	state->response.data.auth.pam_error = nt_status_to_pam(result);

	return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}

/* Change user password with auth crap*/

void winbindd_pam_chng_pswd_auth_crap(struct winbindd_cli_state *state)
{
	struct winbindd_domain *domain = NULL;
	const char *domain_name = NULL;

	/* Ensure null termination */
	state->request.data.chng_pswd_auth_crap.user[
		sizeof(state->request.data.chng_pswd_auth_crap.user)-1]=0;
	state->request.data.chng_pswd_auth_crap.domain[
		sizeof(state->request.data.chng_pswd_auth_crap.domain)-1]=0;
	
	DEBUG(3, ("[%5lu]: pam change pswd auth crap domain: %s user: %s\n",
		  (unsigned long)state->pid,
		  state->request.data.chng_pswd_auth_crap.domain,
		  state->request.data.chng_pswd_auth_crap.user));
	
	if (*state->request.data.chng_pswd_auth_crap.domain != '\0') {
		domain_name = state->request.data.chng_pswd_auth_crap.domain;
	} else if (lp_winbind_use_default_domain()) {
		domain_name = lp_workgroup();
	}

	if (domain_name != NULL)
		domain = find_domain_from_name(domain_name);

	if (domain != NULL) {
		DEBUG(7, ("[%5lu]: pam auth crap changing pswd in domain: "
			  "%s\n", (unsigned long)state->pid,domain->name));
		sendto_domain(state, domain);
		return;
	}

	set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER);
	DEBUG(5, ("CRAP change password  for %s\\%s returned %s (PAM: %d)\n",
		  state->request.data.chng_pswd_auth_crap.domain,
		  state->request.data.chng_pswd_auth_crap.user, 
		  state->response.data.auth.nt_status_string,
		  state->response.data.auth.pam_error));
	request_error(state);
	return;
}

enum winbindd_result winbindd_dual_pam_chng_pswd_auth_crap(struct winbindd_domain *domainSt, struct winbindd_cli_state *state)
{
	NTSTATUS result;
	DATA_BLOB new_nt_password;
	DATA_BLOB old_nt_hash_enc;
	DATA_BLOB new_lm_password;
	DATA_BLOB old_lm_hash_enc;
	fstring  domain,user;
	POLICY_HND dom_pol;
	struct winbindd_domain *contact_domain = domainSt;
	struct rpc_pipe_client *cli;

	/* Ensure null termination */
	state->request.data.chng_pswd_auth_crap.user[
		sizeof(state->request.data.chng_pswd_auth_crap.user)-1]=0;
	state->request.data.chng_pswd_auth_crap.domain[
		sizeof(state->request.data.chng_pswd_auth_crap.domain)-1]=0;
	*domain = 0;
	*user = 0;
	
	DEBUG(3, ("[%5lu]: pam change pswd auth crap domain: %s user: %s\n",
		  (unsigned long)state->pid,
		  state->request.data.chng_pswd_auth_crap.domain,
		  state->request.data.chng_pswd_auth_crap.user));

	if (lp_winbind_offline_logon()) {
		DEBUG(0,("Refusing password change as winbind offline logons are enabled. "));
		DEBUGADD(0,("Changing passwords here would risk inconsistent logons\n"));
		result = NT_STATUS_ACCESS_DENIED;
		goto done;
	}

	if (*state->request.data.chng_pswd_auth_crap.domain) {
		fstrcpy(domain,state->request.data.chng_pswd_auth_crap.domain);
	} else {
		parse_domain_user(state->request.data.chng_pswd_auth_crap.user,
				  domain, user);

		if(!*domain) {
			DEBUG(3,("no domain specified with username (%s) - "
				 "failing auth\n",
				 state->request.data.chng_pswd_auth_crap.user));
			result = NT_STATUS_NO_SUCH_USER;
			goto done;
		}
	}

	if (!*domain && lp_winbind_use_default_domain()) {
		fstrcpy(domain,(char *)lp_workgroup());
	}

	if(!*user) {
		fstrcpy(user, state->request.data.chng_pswd_auth_crap.user);
	}

	DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n",
		  (unsigned long)state->pid, domain, user));
	
	/* Change password */
	new_nt_password = data_blob_talloc(
		state->mem_ctx,
		state->request.data.chng_pswd_auth_crap.new_nt_pswd,
		state->request.data.chng_pswd_auth_crap.new_nt_pswd_len);

	old_nt_hash_enc = data_blob_talloc(
		state->mem_ctx,
		state->request.data.chng_pswd_auth_crap.old_nt_hash_enc,
		state->request.data.chng_pswd_auth_crap.old_nt_hash_enc_len);

	if(state->request.data.chng_pswd_auth_crap.new_lm_pswd_len > 0)	{
		new_lm_password = data_blob_talloc(
			state->mem_ctx,
			state->request.data.chng_pswd_auth_crap.new_lm_pswd,
			state->request.data.chng_pswd_auth_crap.new_lm_pswd_len);

		old_lm_hash_enc = data_blob_talloc(
			state->mem_ctx,
			state->request.data.chng_pswd_auth_crap.old_lm_hash_enc,
			state->request.data.chng_pswd_auth_crap.old_lm_hash_enc_len);
	} else {
		new_lm_password.length = 0;
		old_lm_hash_enc.length = 0;
	}

	/* Get sam handle */

	result = cm_connect_sam(contact_domain, state->mem_ctx, &cli, &dom_pol);
	if (!NT_STATUS_IS_OK(result)) {
		DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
		goto done;
	}

	result = rpccli_samr_chng_pswd_auth_crap(
		cli, state->mem_ctx, user, new_nt_password, old_nt_hash_enc,
		new_lm_password, old_lm_hash_enc);

 done:    
	state->response.data.auth.nt_status = NT_STATUS_V(result);
	fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
	fstrcpy(state->response.data.auth.error_string,
		get_friendly_nt_error_msg(result));
	state->response.data.auth.pam_error = nt_status_to_pam(result);

	DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, 
	      ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n", 
	       domain, user,
	       state->response.data.auth.nt_status_string,
	       state->response.data.auth.pam_error));	      

	return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}