This is my 'Authentication Rewrite' version 1.01, mostly as submitted to

samba-technical a few weeks ago.

The idea here is to standardize the checking of user names and passwords,
thereby ensuring that all authtentications pass the same standards.  The
interface currently implemented in as

nt_status = check_password(user_info, server_info)

where user_info contains (mostly) the authentication data, and server_info
contains things like the user-id they got, and their resolved user name.

The current ugliness with the way the structures are created will be killed
the next revision, when they will be created and malloced by creator functions.

This patch also includes the first implementation of NTLMv2 in HEAD, but which
needs some more testing.  We also add a hack to allow plaintext passwords to be
compared with smbpasswd, not the system password database.

Finally, this patch probably reintroduces the PAM accounts bug we had in
2.2.0, I'll fix that once this hits the tree.  (I've just finished testing
it on a wide variety of platforms, so I want to get this patch in).
(This used to be commit b30b6202f31d339b48d51c0d38174cafd1cfcd42)

6 files changed, 1471 insertions, 0 deletions

diff --git a/source3/auth/auth.c b/source3/auth/auth.c
new file mode 100644
index 0000000000..851e1f53cf
--- /dev/null
+++ b/source3/auth/auth.c
@@ -0,0 +1,275 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Password and authentication handling
+   Copyright (C) Andrew Tridgell              1992-2000
+   Copyright (C) Luke Kenneth Casson Leighton 1996-2000
+   Copyright (C) Andrew Bartlett              2001
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+extern pstring global_myname;
+
+
+/****************************************************************************
+update the encrypted smbpasswd file from the plaintext username and password
+
+this ugly hack needs to die, but not quite yet...
+*****************************************************************************/
+static BOOL update_smbpassword_file(char *user, char *password)
+{
+	SAM_ACCOUNT 	*sampass = NULL;
+	BOOL 		ret;
+	
+	pdb_init_sam(&sampass);
+	
+	become_root();
+	ret = pdb_getsampwnam(sampass, user);
+	unbecome_root();
+
+	if(ret == False) {
+		DEBUG(0,("pdb_getsampwnam returned NULL\n"));
+		pdb_free_sam(sampass);
+		return False;
+	}
+
+	/*
+	 * Remove the account disabled flag - we are updating the
+	 * users password from a login.
+	 */
+	pdb_set_acct_ctrl(sampass, pdb_get_acct_ctrl(sampass) & ~ACB_DISABLED);
+
+	/* Here, the flag is one, because we want to ignore the
+           XXXXXXX'd out password */
+	ret = change_oem_password( sampass, password, True);
+	if (ret == False) {
+		DEBUG(3,("change_oem_password returned False\n"));
+	}
+
+	pdb_free_sam(sampass);
+	return ret;
+}
+
+/****************************************************************************
+ Check user is in correct domain if required
+****************************************************************************/
+
+static BOOL check_domain_match(char *user, char *domain) 
+{
+  /*
+   * If we aren't serving to trusted domains, we must make sure that
+   * the validation request comes from an account in the same domain
+   * as the Samba server
+   */
+
+  if (!lp_allow_trusted_domains() &&
+      !strequal(lp_workgroup(), domain) ) {
+      DEBUG(1, ("check_domain_match: Attempt to connect as user %s from domain %s denied.\n", user, domain));
+      return False;
+  } else {
+      return True;
+  }
+}
+
+
+uint32 check_password(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info)
+{
+	
+	uint32 nt_status = NT_STATUS_LOGON_FAILURE;
+
+	DEBUG(3, ("check_password:  Checking password for user %s with the new password interface\n", user_info->smb_username.str));
+        if (check_hosts_equiv(user_info->smb_username.str)) {
+		nt_status = NT_STATUS_NOPROBLEMO;
+	}
+		
+  	if (!check_domain_match(user_info->smb_username.str, user_info->domain.str)) {
+		return NT_STATUS_LOGON_FAILURE;
+	}
+
+	if ((lp_security() == SEC_DOMAIN) && (nt_status != NT_STATUS_NOPROBLEMO)) {
+		nt_status = check_domain_security(user_info, server_info);
+	}
+	
+	if ((lp_security() == SEC_SERVER) && (nt_status != NT_STATUS_NOPROBLEMO)) {
+		nt_status = check_server_security(user_info, server_info);
+	}
+
+	if (lp_security() >= SEC_SERVER) {
+		smb_user_control(user_info->smb_username.str, nt_status);
+	}
+
+	if ((nt_status != NT_STATUS_NOPROBLEMO) 
+	    && (user_info->plaintext_password.len > 0) 
+	    && (!lp_plaintext_to_smbpasswd())) {
+		return (pass_check(user_info->smb_username.str, 
+				  user_info->plaintext_password.str, 
+				  user_info->plaintext_password.len, 
+				  lp_update_encrypted() ? 
+				  update_smbpassword_file : NULL) 
+			? NT_STATUS_NOPROBLEMO : NT_STATUS_LOGON_FAILURE);
+	}
+
+	if (nt_status != NT_STATUS_NOPROBLEMO) {
+		nt_status = check_smbpasswd_security(user_info, server_info);
+	}
+	
+	if (nt_status == NT_STATUS_NOPROBLEMO) {
+		nt_status = smb_pam_accountcheck(user_info->smb_username.str);
+	}
+
+	if (nt_status == NT_STATUS_NOPROBLEMO) {
+		DEBUG(5, ("check_password:  Password for user %s suceeded\n", user_info->smb_username.str));
+	} else {
+		DEBUG(3, ("check_password:  Password for user %s FAILED with error %d\n", user_info->smb_username.str, nt_status));
+	}		
+	return nt_status;
+
+}
+
+/****************************************************************************
+ COMPATABILITY INTERFACES:
+ ***************************************************************************/
+
+/****************************************************************************
+check if a username/password is OK assuming the password is a 24 byte
+SMB hash
+return True if the password is correct, False otherwise
+****************************************************************************/
+
+uint32 pass_check_smb_with_chal(char *user, char *domain, uchar chal[8], 
+                    uchar *lm_pwd, int lm_pwd_len,
+		    uchar *nt_pwd, int nt_pwd_len)
+{
+
+	auth_usersupplied_info user_info;
+	auth_serversupplied_info server_info;
+	AUTH_STR ourdomain, theirdomain, smb_username, wksta_name;
+		
+	ZERO_STRUCT(user_info);
+	ZERO_STRUCT(ourdomain);
+	ZERO_STRUCT(theirdomain);
+	ZERO_STRUCT(smb_username);
+	ZERO_STRUCT(wksta_name);
+	
+	ourdomain.str = lp_workgroup();
+	ourdomain.len = strlen(ourdomain.str);
+
+	theirdomain.str = domain;
+	theirdomain.len = strlen(theirdomain.str);
+
+	user_info.requested_domain = theirdomain;
+	user_info.domain = ourdomain;
+	
+	smb_username.str = user;
+	smb_username.len = strlen(smb_username.str);
+
+	user_info.requested_username = smb_username;  /* For the time-being */
+	user_info.smb_username = smb_username;
+
+	user_info.wksta_name.str = client_name();
+	user_info.wksta_name.len = strlen(client_name());
+
+	user_info.wksta_name = wksta_name;
+
+	memcpy(user_info.chal, chal, 8);
+
+	if (lm_pwd_len >= 24 || (lp_encrypted_passwords() && (lm_pwd_len == 0) && lp_null_passwords())) {
+		/* if 24 bytes long assume it is an encrypted password */
+	  
+		user_info.lm_resp.buffer = (uint8 *)lm_pwd;
+		user_info.lm_resp.len = lm_pwd_len;
+		user_info.nt_resp.buffer = (uint8 *)nt_pwd;
+		user_info.nt_resp.len = nt_pwd_len;
+
+	} else {
+		unsigned char local_lm_response[24];
+		unsigned char local_nt_response[24];
+		
+		/*
+		 * Not encrypted - do so.
+		 */
+		
+		DEBUG(5,("pass_check_smb: User passwords not in encrypted format.\n"));
+
+		if (lm_pwd_len > 0) {
+			SMBencrypt( (uchar *)lm_pwd, user_info.chal, local_lm_response);
+			user_info.lm_resp.buffer = (uint8 *)local_lm_response;
+			user_info.lm_resp.len = 24;
+
+			/* This encrypts the lm_pwd feild, which actualy contains the password
+			   rather than the nt_pwd field becouse that contains nothing */
+			SMBNTencrypt((uchar *)lm_pwd, user_info.chal, local_nt_response);
+			user_info.nt_resp.buffer = (uint8 *)local_nt_response;
+			user_info.nt_resp.len = 24;
+		}
+		
+		user_info.plaintext_password.str = lm_pwd;
+		user_info.plaintext_password.len = lm_pwd_len;
+
+	}
+
+	return check_password(&user_info, &server_info);
+}
+
+uint32 pass_check_smb(char *user, char *domain,
+                    uchar *lm_pwd, int lm_pwd_len,
+		    uchar *nt_pwd, int nt_pwd_len)
+{
+	uchar chal[8];
+
+	if (!last_challenge(chal)) {
+		generate_random_buffer( chal, 8, False);
+	}
+
+	return pass_check_smb_with_chal(user, domain, chal, 
+					lm_pwd, lm_pwd_len,
+					nt_pwd, nt_pwd_len);
+
+}
+
+/****************************************************************************
+check if a username/password pair is OK either via the system password
+database or the encrypted SMB password database
+return True if the password is correct, False otherwise
+****************************************************************************/
+BOOL password_ok(char *user, char *password, int pwlen)
+{
+
+	/* 
+	 *  This hack must die!  But until I rewrite the rest of samba
+	 *  it must stay - abartlet 2001-08-03
+	 */
+
+	if ((pwlen == 0) && !lp_null_passwords()) {
+                DEBUG(4,("Null passwords not allowed.\n"));
+                return False;
+        }
+	
+	if (pass_check_smb(user, lp_workgroup(), NULL, 0, password, pwlen) == NT_STATUS_NOPROBLEMO) {
+		return True;
+	}
+
+	if (pass_check_smb(user, lp_workgroup(), password, pwlen, NULL, 0) == NT_STATUS_NOPROBLEMO) {
+		return True;
+	}
+
+	return False;
+}
+
diff --git a/source3/auth/auth_domain.c b/source3/auth/auth_domain.c
new file mode 100644
index 0000000000..4bf0a05d7f
--- /dev/null
+++ b/source3/auth/auth_domain.c
@@ -0,0 +1,417 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Authenticate against a remote domain
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Andrew Bartlett 2001
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+extern struct in_addr ipzero;
+
+BOOL global_machine_password_needs_changing = False;
+
+extern pstring global_myname;
+
+/***********************************************************************
+ Connect to a remote machine for domain security authentication
+ given a name or IP address.
+ ***********************************************************************/
+
+static BOOL connect_to_domain_password_server(struct cli_state *pcli, 
+					      char *server, unsigned char *trust_passwd)
+{
+	struct in_addr dest_ip;
+	fstring remote_machine;
+
+	if(cli_initialise(pcli) == NULL) {
+		DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n"));
+		return False;
+	}
+
+	if (is_ipaddress(server)) {
+		struct in_addr to_ip;
+	  
+		/* we shouldn't have 255.255.255.255 forthe IP address of 
+		   a password server anyways */
+		if ((to_ip.s_addr=inet_addr(server)) == 0xFFFFFFFF) {
+			DEBUG (0,("connect_to_domain_password_server: inet_addr(%s) returned 0xFFFFFFFF!\n", server));
+			return False;
+		}
+
+		if (!name_status_find(0x20, to_ip, remote_machine)) {
+			DEBUG(0, ("connect_to_domain_password_server: Can't "
+				  "resolve name for IP %s\n", server));
+			return False;
+		}
+	} else {
+		fstrcpy(remote_machine, server);
+	}
+
+	standard_sub_basic(remote_machine);
+	strupper(remote_machine);
+
+	if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
+		DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine));
+		cli_shutdown(pcli);
+		return False;
+	}
+  
+	if (ismyip(dest_ip)) {
+		DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n",
+			 remote_machine));
+		cli_shutdown(pcli);
+		return False;
+	}
+  
+	if (!cli_connect(pcli, remote_machine, &dest_ip)) {
+		DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \
+machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+		cli_shutdown(pcli);
+		return False;
+	}
+  
+	if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) {
+		DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \
+session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+		return False;
+	}
+  
+	pcli->protocol = PROTOCOL_NT1;
+
+	if (!cli_negprot(pcli)) {
+		DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \
+Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+		cli_shutdown(pcli);
+		return False;
+	}
+
+	if (pcli->protocol != PROTOCOL_NT1) {
+		DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n",
+			 remote_machine));
+		cli_shutdown(pcli);
+		return False;
+	}
+
+	/*
+	 * Do an anonymous session setup.
+	 */
+
+	if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) {
+		DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \
+Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+		cli_shutdown(pcli);
+		return False;
+	}
+
+	if (!(pcli->sec_mode & 1)) {
+		DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n",
+			 remote_machine));
+		cli_shutdown(pcli);
+		return False;
+	}
+
+	if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) {
+		DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \
+Error was : %s.\n", remote_machine, cli_errstr(pcli) ));
+		cli_shutdown(pcli);
+		return False;
+	}
+
+	/*
+	 * We now have an anonymous connection to IPC$ on the domain password server.
+	 */
+
+	/*
+	 * Even if the connect succeeds we need to setup the netlogon
+	 * pipe here. We do this as we may just have changed the domain
+	 * account password on the PDC and yet we may be talking to
+	 * a BDC that doesn't have this replicated yet. In this case
+	 * a successful connect to a DC needs to take the netlogon connect
+	 * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>.
+	 */
+
+	if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) {
+		DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \
+machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
+		cli_nt_session_close(pcli);
+		cli_ulogoff(pcli);
+		cli_shutdown(pcli);
+		return False;
+	}
+
+	if (cli_nt_setup_creds(pcli, trust_passwd) == False) {
+		DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \
+%s. Error was : %s.\n", remote_machine, cli_errstr(pcli)));
+		cli_nt_session_close(pcli);
+		cli_ulogoff(pcli);
+		cli_shutdown(pcli);
+		return(False);
+	}
+
+	return True;
+}
+
+/***********************************************************************
+ Utility function to attempt a connection to an IP address of a DC.
+************************************************************************/
+
+static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, 
+				  unsigned char *trust_passwd)
+{
+	fstring dc_name;
+
+	/*
+	 * Ignore addresses we have already tried.
+	 */
+
+	if (ip_equal(ipzero, *ip))
+		return False;
+
+	if (!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name))
+		return False;
+
+	return connect_to_domain_password_server(pcli, dc_name, trust_passwd);
+}
+
+/***********************************************************************
+ We have been asked to dynamcially determine the IP addresses of
+ the PDC and BDC's for this DOMAIN, and query them in turn.
+************************************************************************/
+static BOOL find_connect_pdc(struct cli_state *pcli, 
+			     unsigned char *trust_passwd, 
+			     time_t last_change_time)
+{
+	struct in_addr *ip_list = NULL;
+	int count = 0;
+	int i;
+	BOOL connected_ok = False;
+	time_t time_now = time(NULL);
+	BOOL use_pdc_only = False;
+
+	/*
+	 * If the time the machine password has changed
+	 * was less than an hour ago then we need to contact
+	 * the PDC only, as we cannot be sure domain replication
+	 * has yet taken place. Bug found by Gerald (way to go
+	 * Gerald !). JRA.
+	 */
+
+	if (time_now - last_change_time < 3600)
+		use_pdc_only = True;
+
+	if (!get_dc_list(use_pdc_only, lp_workgroup(), &ip_list, &count))
+		return False;
+
+	/*
+	 * Firstly try and contact a PDC/BDC who has the same
+	 * network address as any of our interfaces.
+	 */
+	for(i = 0; i < count; i++) {
+		if(!is_local_net(ip_list[i]))
+			continue;
+
+		if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd))) 
+			break;
+		
+		ip_list[i] = ipzero; /* Tried and failed. */
+	}
+
+	/*
+	 * Secondly try and contact a random PDC/BDC.
+	 */
+	if(!connected_ok) {
+		i = (sys_random() % count);
+
+		if (!(connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
+			ip_list[i] = ipzero; /* Tried and failed. */
+	}
+
+	/*
+	 * Finally go through the IP list in turn, ignoring any addresses
+	 * we have already tried.
+	 */
+	if(!connected_ok) {
+		/*
+		 * Try and connect to any of the other IP addresses in the PDC/BDC list.
+		 * Note that from a WINS server the #1 IP address is the PDC.
+		 */
+		for(i = 0; i < count; i++) {
+			if((connected_ok = attempt_connect_to_dc(pcli, &ip_list[i], trust_passwd)))
+				break;
+		}
+	}
+
+	if(ip_list != NULL)
+		free((char *)ip_list);
+
+
+	return connected_ok;
+}
+
+/***********************************************************************
+ Do the same as security=server, but using NT Domain calls and a session
+ key from the machine password.  If the server parameter is specified
+ use it, otherwise figure out a server from the 'password server' param.
+************************************************************************/
+
+uint32 domain_client_validate(const auth_usersupplied_info *user_info, 
+			      auth_serversupplied_info *server_info, 
+			      char *server)
+{
+	unsigned char trust_passwd[16];
+	fstring remote_machine;
+	char *p, *pserver;
+	NET_ID_INFO_CTR ctr;
+	NET_USER_INFO_3 info3;
+	struct cli_state cli;
+	uint32 smb_uid_low;
+	BOOL connected_ok = False;
+	time_t last_change_time;
+	uint32 nt_status;
+
+	/* 
+	 * Check that the requested domain is not our own machine name.
+	 * If it is, we should never check the PDC here, we use our own local
+	 * password file.
+	 */
+
+	if(strequal(user_info->domain.str, global_myname)) {
+		DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
+		return NT_STATUS_LOGON_FAILURE;
+	}
+
+	/*
+	 * Get the machine account password for our primary domain
+	 */
+	if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, &last_change_time))
+	{
+		DEBUG(0, ("domain_client_validate: could not fetch trust account password for domain %s\n", lp_workgroup()));
+		return NT_STATUS_LOGON_FAILURE;
+	}
+
+	/* Test if machine password is expired and need to be changed */
+	if (time(NULL) > last_change_time + lp_machine_password_timeout())
+	{
+		global_machine_password_needs_changing = True;
+	}
+
+	/*
+	 * At this point, smb_apasswd points to the lanman response to
+	 * the challenge in local_challenge, and smb_ntpasswd points to
+	 * the NT response to the challenge in local_challenge. Ship
+	 * these over the secure channel to a domain controller and
+	 * see if they were valid.
+	 */
+
+	ZERO_STRUCT(cli);
+
+	/*
+	 * Treat each name in the 'password server =' line as a potential
+	 * PDC/BDC. Contact each in turn and try and authenticate.
+	 */
+
+	if (server) {
+		p = server;
+	} else {
+		pserver = lp_passwordserver();
+		if (! *pserver) pserver = "*";
+		p = pserver;
+	}
+
+	while (!connected_ok &&
+	       next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
+		if(strequal(remote_machine, "*")) {
+			connected_ok = find_connect_pdc(&cli, trust_passwd, last_change_time);
+		} else {
+			connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd);
+		}
+	}
+
+	if (!connected_ok) {
+		DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
+		cli_shutdown(&cli);
+		return NT_STATUS_LOGON_FAILURE;
+	}
+
+	/* We really don't care what LUID we give the user. */
+	generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
+
+	ZERO_STRUCT(info3);
+
+	cli_nt_login_network(&cli, user_info->domain.str, user_info->smb_username.str, smb_uid_low, user_info->chal,
+			     user_info->lm_resp.buffer, user_info->lm_resp.len, 
+			     user_info->nt_resp.buffer, user_info->lm_resp.len,
+			     &ctr, &info3);
+
+	cli_error(&cli, NULL, NULL, &nt_status);
+	if (nt_status != NT_STATUS_NOPROBLEMO) {
+		DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
+%s to Domain controller %s. Error was %s.\n", user_info->smb_username.str, user_info->domain.str, remote_machine, cli_errstr(&cli)));
+	}
+
+	/*
+	 * Here, if we really want it, we have lots of info about the user in info3.
+	 */
+
+#if 0
+	/* 
+	 * We don't actually need to do this - plus it fails currently with
+	 * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
+	 * send here. JRA.
+	 */
+
+	if (nt_status == NT_STATUS_NOPROBLMO) {
+		if(cli_nt_logoff(&cli, &ctr) == False) {
+			DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
+%s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));        
+			nt_status = NT_STATUS_LOGON_FAILURE;
+		}
+	}
+#endif /* 0 */
+
+	/* Note - once the cli stream is shutdown the mem_ctx used
+	   to allocate the other_sids and gids structures has been deleted - so
+	   these pointers are no longer valid..... */
+
+	cli_nt_session_close(&cli);
+	cli_ulogoff(&cli);
+	cli_shutdown(&cli);
+	return nt_status;
+}
+
+/****************************************************************************
+ Check for a valid username and password in security=domain mode.
+****************************************************************************/
+
+uint32 check_domain_security(const auth_usersupplied_info *user_info, 
+			     auth_serversupplied_info *server_info)
+{
+	uint32 nt_status = NT_STATUS_LOGON_FAILURE;
+
+	if(lp_security() != SEC_DOMAIN)
+		return NT_STATUS_LOGON_FAILURE;
+
+	nt_status = domain_client_validate(user_info, server_info, NULL);
+
+	return nt_status;
+}
+
+
+
diff --git a/source3/auth/auth_rhosts.c b/source3/auth/auth_rhosts.c
new file mode 100644
index 0000000000..c1bee6247c
--- /dev/null
+++ b/source3/auth/auth_rhosts.c
@@ -0,0 +1,165 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Main SMB reply routines
+   Copyright (C) Andrew Tridgell 1992-1998
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+
+/****************************************************************************
+ Read the a hosts.equiv or .rhosts file and check if it
+ allows this user from this machine.
+****************************************************************************/
+
+static BOOL check_user_equiv(char *user, char *remote, char *equiv_file)
+{
+  int plus_allowed = 1;
+  char *file_host;
+  char *file_user;
+  char **lines = file_lines_load(equiv_file, NULL);
+  int i;
+
+  DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file));
+  if (! lines) return False;
+  for (i=0; lines[i]; i++) {
+    char *buf = lines[i];
+    trim_string(buf," "," ");
+
+    if (buf[0] != '#' && buf[0] != '\n') 
+    {
+      BOOL is_group = False;
+      int plus = 1;
+      char *bp = buf;
+      if (strcmp(buf, "NO_PLUS\n") == 0)
+      {
+	DEBUG(6, ("check_user_equiv NO_PLUS\n"));
+	plus_allowed = 0;
+      }
+      else {
+	if (buf[0] == '+') 
+	{
+	  bp++;
+	  if (*bp == '\n' && plus_allowed) 
+	  {
+	    /* a bare plus means everbody allowed */
+	    DEBUG(6, ("check_user_equiv everybody allowed\n"));
+	    file_lines_free(lines);
+	    return True;
+	  }
+	}
+	else if (buf[0] == '-')
+	{
+	  bp++;
+	  plus = 0;
+	}
+	if (*bp == '@') 
+	{
+	  is_group = True;
+	  bp++;
+	}
+	file_host = strtok(bp, " \t\n");
+	file_user = strtok(NULL, " \t\n");
+	DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)", 
+                 file_user ? file_user : "(null)" ));
+	if (file_host && *file_host) 
+	{
+	  BOOL host_ok = False;
+
+#if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
+	  if (is_group)
+	    {
+	      static char *mydomain = NULL;
+	      if (!mydomain)
+		yp_get_default_domain(&mydomain);
+	      if (mydomain && innetgr(file_host,remote,user,mydomain))
+		host_ok = True;
+	    }
+#else
+	  if (is_group)
+	    {
+	      DEBUG(1,("Netgroups not configured\n"));
+	      continue;
+	    }
+#endif
+
+	  /* is it this host */
+	  /* the fact that remote has come from a call of gethostbyaddr
+	   * means that it may have the fully qualified domain name
+	   * so we could look up the file version to get it into
+	   * a canonical form, but I would rather just type it
+	   * in full in the equiv file
+	   */
+	  if (!host_ok && !is_group && strequal(remote, file_host))
+	    host_ok = True;
+
+	  if (!host_ok)
+	    continue;
+
+	  /* is it this user */
+	  if (file_user == 0 || strequal(user, file_user)) 
+	    {
+	      DEBUG(5, ("check_user_equiv matched %s%s %s\n",
+			(plus ? "+" : "-"), file_host,
+			(file_user ? file_user : "")));
+	      file_lines_free(lines);
+	      return (plus ? True : False);
+	    }
+	}
+      }
+    }
+  }
+  file_lines_free(lines);
+  return False;
+}
+
+
+/****************************************************************************
+check for a possible hosts equiv or rhosts entry for the user
+****************************************************************************/
+BOOL check_hosts_equiv(char *user)
+{
+  char *fname = NULL;
+  pstring rhostsfile;
+  struct passwd *pass = Get_Pwnam(user,True);
+
+  if (!pass) 
+    return(False);
+
+  fname = lp_hosts_equiv();
+
+  /* note: don't allow hosts.equiv on root */
+  if (fname && *fname && (pass->pw_uid != 0)) {
+	  if (check_user_equiv(user,client_name(),fname))
+		  return(True);
+  }
+  
+  if (lp_use_rhosts())
+    {
+      char *home = get_user_home_dir(user);
+      if (home) {
+	      slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
+	      if (check_user_equiv(user,client_name(),rhostsfile))
+		      return(True);
+      }
+    }
+
+  return(False);
+}
diff --git a/source3/auth/auth_sam.c b/source3/auth/auth_sam.c
new file mode 100644
index 0000000000..ce0b03d942
--- /dev/null
+++ b/source3/auth/auth_sam.c
@@ -0,0 +1,229 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Password and authentication handling
+   Copyright (C) Andrew Tridgell              1992-2000
+   Copyright (C) Luke Kenneth Casson Leighton 1996-2000
+   Copyright (C) Andrew Bartlett              2001
+   
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+/****************************************************************************
+core of smb password checking routine.
+****************************************************************************/
+static BOOL smb_pwd_check_ntlmv1(const uchar *password,
+				const uchar *part_passwd,
+				const uchar *c8,
+				uchar user_sess_key[16])
+{
+  /* Finish the encryption of part_passwd. */
+  uchar p24[24];
+
+  if (part_passwd == NULL) {
+	  DEBUG(10,("No password set - DISALLOWING access\n"));
+	  /* No password set - always false ! */
+	  return False;
+  }
+
+  SMBOWFencrypt(part_passwd, c8, p24);
+	if (user_sess_key != NULL)
+	{
+		SMBsesskeygen_ntv1(part_passwd, NULL, user_sess_key);
+	}
+
+
+
+#if DEBUG_PASSWORD
+	DEBUG(100,("Part password (P16) was |"));
+	dump_data(100, part_passwd, 16);
+	DEBUG(100,("Password from client was |"));
+	dump_data(100, password, 24);
+	DEBUG(100,("Given challenge was |"));
+	dump_data(100, c8, 8);
+	DEBUG(100,("Value from encryption was |"));
+	dump_data(100, p24, 24);
+#endif
+  return (memcmp(p24, password, 24) == 0);
+}
+
+/****************************************************************************
+core of smb password checking routine.
+****************************************************************************/
+static BOOL smb_pwd_check_ntlmv2(const uchar *password, size_t pwd_len,
+				uchar *part_passwd,
+				uchar const *c8,
+				const char *user, const char *domain,
+				char *user_sess_key)
+{
+	/* Finish the encryption of part_passwd. */
+	uchar kr[16];
+	uchar resp[16];
+
+	if (part_passwd == NULL)
+	{
+		DEBUG(10,("No password set - DISALLOWING access\n"));
+		/* No password set - always False */
+		return False;
+	}
+
+	ntv2_owf_gen(part_passwd, user, domain, kr);
+	SMBOWFencrypt_ntv2(kr, c8, 8, password+16, pwd_len-16, resp);
+	if (user_sess_key != NULL)
+	{
+		SMBsesskeygen_ntv2(kr, resp, user_sess_key);
+	}
+
+#if DEBUG_PASSWORD
+	DEBUG(100,("Part password (P16) was |"));
+	dump_data(100, part_passwd, 16);
+	DEBUG(100,("Password from client was |"));
+	dump_data(100, password, pwd_len);
+	DEBUG(100,("Given challenge was |"));
+	dump_data(100, c8, 8);
+	DEBUG(100,("Value from encryption was |"));
+	dump_data(100, resp, 16);
+#endif
+
+	return (memcmp(resp, password, 16) == 0);
+}
+
+
+/****************************************************************************
+ Do a specific test for an smb password being correct, given a smb_password and
+ the lanman and NT responses.
+****************************************************************************/
+uint32 smb_password_ok(SAM_ACCOUNT *sampass, const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info)
+{
+	uint8 *nt_pw, *lm_pw;
+
+	/* Quit if the account was disabled. */
+	if(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) {
+		DEBUG(1,("Account for user '%s' was disabled.\n", user_info->smb_username.str));
+		return(NT_STATUS_ACCOUNT_DISABLED);
+	}
+
+	if (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) 
+	{
+		if (lp_null_passwords()) 
+		{
+			DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", user_info->smb_username.str));
+			return(NT_STATUS_NOPROBLEMO);
+		} 
+		else 
+		{
+			DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", user_info->smb_username.str));
+			return(NT_STATUS_LOGON_FAILURE);
+		}		
+	}
+
+	if (!user_info || !sampass) 
+		return(NT_STATUS_LOGON_FAILURE);
+
+	DEBUG(4,("smb_password_ok: Checking SMB password for user %s\n",user_info->smb_username.str));
+
+	nt_pw = pdb_get_nt_passwd(sampass);
+
+	if (nt_pw != NULL) {
+		if ((user_info->nt_resp.len > 24 )) {
+			/* We have the NT MD4 hash challenge available - see if we can
+			   use it (ie. does it exist in the smbpasswd file).
+			*/
+			DEBUG(4,("smb_password_ok: Checking NTLMv2 password\n"));
+			if (smb_pwd_check_ntlmv2( user_info->nt_resp.buffer, 
+						  user_info->nt_resp.len, 
+						  nt_pw, 
+						  user_info->chal, user_info->requested_username.str, 
+						  user_info->requested_domain.str,
+						  server_info->session_key))
+			{
+				return NT_STATUS_NOPROBLEMO;
+			}
+			DEBUG(4,("smb_password_ok: NT MD4 password check failed\n"));
+
+		} else if (lp_ntlm_auth() && (user_info->nt_resp.len == 24 )) {
+				/* We have the NT MD4 hash challenge available - see if we can
+				   use it (ie. does it exist in the smbpasswd file).
+				*/
+			DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
+			if (smb_pwd_check_ntlmv1(user_info->nt_resp.buffer, 
+						 nt_pw, user_info->chal,
+						 server_info->session_key)) {
+				DEBUG(4,("smb_password_ok: NT MD4 password check succeeded\n"));
+				return NT_STATUS_NOPROBLEMO;
+			} else { 
+				DEBUG(4,("smb_password_ok: NT MD4 password check failed\n"));
+				return NT_STATUS_WRONG_PASSWORD;
+			}
+		}
+	}
+	
+	lm_pw = pdb_get_lanman_passwd(sampass);
+	
+	if(lp_lanman_auth() && (lm_pw != NULL) && (user_info->lm_resp.len == 24 )) {
+		DEBUG(4,("smb_password_ok: Checking LM password\n"));
+		if (smb_pwd_check_ntlmv1(user_info->lm_resp.buffer, 
+					 lm_pw, user_info->chal,
+					 server_info->session_key)) {
+			DEBUG(4,("smb_password_ok: LM password check succeeded\n"));
+			return NT_STATUS_NOPROBLEMO;
+		} else {
+			DEBUG(4,("smb_password_ok: LM password check failed\n"));
+			return NT_STATUS_WRONG_PASSWORD;
+		}
+	}
+	
+	return NT_STATUS_LOGON_FAILURE;
+}
+
+
+/****************************************************************************
+check if a username/password is OK assuming the password is a 24 byte
+SMB hash
+return True if the password is correct, False otherwise
+****************************************************************************/
+
+uint32 check_smbpasswd_security(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info)
+{
+	SAM_ACCOUNT *sampass=NULL;
+	BOOL ret;
+	uint32 nt_status;
+
+	pdb_init_sam(&sampass);
+
+	/* get the account information */
+	ret = pdb_getsampwnam(sampass, user_info->smb_username.str);
+	if (ret == False)
+	{
+		DEBUG(1,("Couldn't find user '%s' in passdb file.\n", user_info->smb_username.str));
+		pdb_free_sam(sampass);
+		return(NT_STATUS_NO_SUCH_USER);
+	}
+
+	if ((nt_status = smb_password_ok(sampass, user_info, server_info)) != NT_STATUS_NOPROBLEMO)
+	{
+		pdb_free_sam(sampass);
+		return(nt_status);
+	}
+	
+	pdb_free_sam(sampass);
+	return nt_status;
+}
+
+
diff --git a/source3/auth/auth_server.c b/source3/auth/auth_server.c
new file mode 100644
index 0000000000..dc1d924b3c
--- /dev/null
+++ b/source3/auth/auth_server.c
@@ -0,0 +1,244 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Authenticate to a remote server
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Andrew Bartlett 2001
+
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+extern pstring global_myname;
+
+/****************************************************************************
+ Return the client state structure.
+****************************************************************************/
+
+struct cli_state *server_client(void)
+{
+	static struct cli_state pw_cli;
+	return &pw_cli;
+}
+
+/****************************************************************************
+ Support for server level security.
+****************************************************************************/
+
+struct cli_state *server_cryptkey(void)
+{
+	struct cli_state *cli;
+	fstring desthost;
+	struct in_addr dest_ip;
+	char *p, *pserver;
+	BOOL connected_ok = False;
+
+	cli = server_client();
+
+	if (!cli_initialise(cli))
+		return NULL;
+
+        pserver = strdup(lp_passwordserver());
+	p = pserver;
+
+        while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
+		standard_sub_basic(desthost);
+		strupper(desthost);
+
+		if(!resolve_name( desthost, &dest_ip, 0x20)) {
+			DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
+			continue;
+		}
+
+		if (ismyip(dest_ip)) {
+			DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
+			continue;
+		}
+
+		if (cli_connect(cli, desthost, &dest_ip)) {
+			DEBUG(3,("connected to password server %s\n",desthost));
+			connected_ok = True;
+			break;
+		}
+	}
+
+	free(pserver);
+
+	if (!connected_ok) {
+		DEBUG(0,("password server not available\n"));
+		cli_shutdown(cli);
+		return NULL;
+	}
+
+	if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip))
+		return NULL;
+
+	DEBUG(3,("got session\n"));
+
+	if (!cli_negprot(cli)) {
+		DEBUG(1,("%s rejected the negprot\n",desthost));
+		cli_shutdown(cli);
+		return NULL;
+	}
+
+	if (cli->protocol < PROTOCOL_LANMAN2 ||
+	    !(cli->sec_mode & 1)) {
+		DEBUG(1,("%s isn't in user level security mode\n",desthost));
+		cli_shutdown(cli);
+		return NULL;
+	}
+
+	DEBUG(3,("password server OK\n"));
+
+	return cli;
+}
+
+
+/****************************************************************************
+ Validate a password with the password server.
+****************************************************************************/
+
+static uint32 server_validate(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info)
+{
+	struct cli_state *cli;
+	static unsigned char badpass[24];
+	static fstring baduser; 
+	static BOOL tested_password_server = False;
+	static BOOL bad_password_server = False;
+	uint32 nt_status = NT_STATUS_LOGON_FAILURE;
+
+	cli = server_client();
+
+	if (!cli->initialised) {
+		DEBUG(1,("password server %s is not connected\n", cli->desthost));
+		return(NT_STATUS_LOGON_FAILURE);
+	}  
+
+	if(badpass[0] == 0)
+		memset(badpass, 0x1f, sizeof(badpass));
+
+	if((user_info->nt_resp.len == sizeof(badpass)) && 
+	   !memcmp(badpass, user_info->nt_resp.buffer, sizeof(badpass))) {
+		/* 
+		 * Very unlikely, our random bad password is the same as the users
+		 * password.
+		 */
+		memset(badpass, badpass[0]+1, sizeof(badpass));
+	}
+
+	if(baduser[0] == 0) {
+		fstrcpy(baduser, INVALID_USER_PREFIX);
+		fstrcat(baduser, global_myname);
+	}
+
+	/*
+	 * Attempt a session setup with a totally incorrect password.
+	 * If this succeeds with the guest bit *NOT* set then the password
+	 * server is broken and is not correctly setting the guest bit. We
+	 * need to detect this as some versions of NT4.x are broken. JRA.
+	 */
+
+	/* I sure as hell hope that there arn't servers out there that take 
+	 * NTLMv2 and have this bug, as we don't test for that... 
+	 *  - abartlet@samba.org
+	 */
+
+	if(!tested_password_server) {
+		if (cli_session_setup(cli, baduser, (char *)badpass, sizeof(badpass), 
+					(char *)badpass, sizeof(badpass), user_info->domain.str)) {
+
+			/*
+			 * We connected to the password server so we
+			 * can say we've tested it.
+			 */
+			tested_password_server = True;
+
+			if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
+				DEBUG(0,("server_validate: password server %s allows users as non-guest \
+with a bad password.\n", cli->desthost));
+				DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
+use this machine as the password server.\n"));
+				cli_ulogoff(cli);
+
+				/*
+				 * Password server has the bug.
+				 */
+				bad_password_server = True;
+				return NT_STATUS_LOGON_FAILURE;
+			}
+			cli_ulogoff(cli);
+		}
+	} else {
+
+		/*
+		 * We have already tested the password server.
+		 * Fail immediately if it has the bug.
+		 */
+
+		if(bad_password_server) {
+			DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \
+with a bad password.\n", cli->desthost));
+			DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \
+use this machine as the password server.\n"));
+			return NT_STATUS_LOGON_FAILURE;
+		}
+	}
+
+	/*
+	 * Now we know the password server will correctly set the guest bit, or is
+	 * not guest enabled, we can try with the real password.
+	 */
+
+	if (!cli_session_setup(cli, user_info->smb_username.str, 
+			       user_info->lm_resp.buffer, 
+			       user_info->lm_resp.len, 
+			       user_info->nt_resp.buffer, 
+			       user_info->nt_resp.len, 
+			       user_info->domain.str)) {
+		DEBUG(1,("password server %s rejected the password\n", cli->desthost));
+		nt_status = NT_STATUS_LOGON_FAILURE;
+	} else {
+		nt_status = NT_STATUS_NOPROBLEMO;
+	}
+
+	/* if logged in as guest then reject */
+	if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
+		DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
+		nt_status = NT_STATUS_LOGON_FAILURE;
+	}
+
+	cli_ulogoff(cli);
+
+	return(nt_status);
+}
+
+/****************************************************************************
+ Check for a valid username and password in security=server mode.
+****************************************************************************/
+
+uint32 check_server_security(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info)
+{
+	
+	if(lp_security() != SEC_SERVER)
+		return NT_STATUS_LOGON_FAILURE;
+	
+	return server_validate(user_info, server_info);
+
+}
+
+
diff --git a/source3/auth/auth_util.c b/source3/auth/auth_util.c
new file mode 100644
index 0000000000..1c12a4322d
--- /dev/null
+++ b/source3/auth/auth_util.c
@@ -0,0 +1,141 @@
+/* 
+   Unix SMB/Netbios implementation.
+   Version 1.9.
+   Authentication utility functions
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Andrew Bartlett 2001
+
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+#include "includes.h"
+
+extern int DEBUGLEVEL;
+
+/* Data to do lanman1/2 password challenge. */
+static unsigned char saved_challenge[8];
+static BOOL challenge_sent=False;
+
+/*******************************************************************
+Get the next challenge value - no repeats.
+********************************************************************/
+void generate_next_challenge(char *challenge)
+{
+        unsigned char buf[8];
+
+        generate_random_buffer(buf,8,False);
+	memcpy(saved_challenge, buf, 8);
+	memcpy(challenge,buf,8);
+	challenge_sent = True;
+}
+
+/*******************************************************************
+set the last challenge sent, usually from a password server
+********************************************************************/
+BOOL set_challenge(unsigned char *challenge)
+{
+	memcpy(saved_challenge,challenge,8);
+	challenge_sent = True;
+	return(True);
+}
+
+/*******************************************************************
+get the last challenge sent
+********************************************************************/
+BOOL last_challenge(unsigned char *challenge)
+{
+	if (!challenge_sent) return(False);
+	memcpy(challenge,saved_challenge,8);
+	return(True);
+}
+
+
+/****************************************************************************
+ Create a UNIX user on demand.
+****************************************************************************/
+
+static int smb_create_user(char *unix_user, char *homedir)
+{
+	pstring add_script;
+	int ret;
+
+	pstrcpy(add_script, lp_adduser_script());
+	if (! *add_script) return -1;
+	all_string_sub(add_script, "%u", unix_user, sizeof(pstring));
+	if (homedir)
+		all_string_sub(add_script, "%H", homedir, sizeof(pstring));
+	ret = smbrun(add_script,NULL);
+	DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
+	return ret;
+}
+
+/****************************************************************************
+ Delete a UNIX user on demand.
+****************************************************************************/
+
+static int smb_delete_user(char *unix_user)
+{
+	pstring del_script;
+	int ret;
+
+	pstrcpy(del_script, lp_deluser_script());
+	if (! *del_script) return -1;
+	all_string_sub(del_script, "%u", unix_user, sizeof(pstring));
+	ret = smbrun(del_script,NULL);
+	DEBUG(3,("smb_delete_user: Running the command `%s' gave %d\n",del_script,ret));
+	return ret;
+}
+
+/****************************************************************************
+ Add and Delete UNIX users on demand, based on NT_STATUS codes.
+****************************************************************************/
+
+void smb_user_control(char *unix_user, uint32 nt_status) 
+{
+	struct passwd *pwd=NULL;
+
+	if(nt_status == NT_STATUS_NOPROBLEMO) {
+		/*
+		 * User validated ok against Domain controller.
+		 * If the admin wants us to try and create a UNIX
+		 * user on the fly, do so.
+		 */
+		if(lp_adduser_script() && !(pwd = smb_getpwnam(unix_user,True)))
+			smb_create_user(unix_user, NULL);
+
+		if(lp_adduser_script() && pwd) {
+			SMB_STRUCT_STAT st;
+
+			/*
+			 * Also call smb_create_user if the users home directory
+			 * doesn't exist. Used with winbindd to allow the script to
+			 * create the home directory for a user mapped with winbindd.
+			 */
+
+			if (pwd->pw_dir && (sys_stat(pwd->pw_dir, &st) == -1) && (errno == ENOENT))
+				smb_create_user(unix_user, pwd->pw_dir);
+		}
+
+	} else if (nt_status == NT_STATUS_NO_SUCH_USER) {
+		/*
+		 * User failed to validate ok against Domain controller.
+		 * If the failure was "user doesn't exist" and admin 
+		 * wants us to try and delete that UNIX user on the fly,
+		 * do so.
+		 */
+		if(lp_deluser_script() && smb_getpwnam(unix_user,True))
+			smb_delete_user(unix_user);
+	}
+
+}