Based orginally by work by Kai, this patch moves our NT_TOKEN generation into

our authenticaion code - removing some of the duplication from the current
code.

This also gets us *much* closer to supporting a real SAM backend, becouse the
SAM can give us the right info then.

This also changes our service.c code, so that we do a VUID (rather than uid)
cache on the connection struct, and do full NT ACL/NT_TOKEN checks (or cached
equivilant) on every packet, for the same r or rw mode the whole share was open
for.

Andrew Bartlett
(This used to be commit d8122cee059fc7098bfa7e42e638a9958b3ac902)

5 files changed, 408 insertions, 107 deletions

diff --git a/source3/auth/auth_builtin.c b/source3/auth/auth_builtin.c
index 5ce7075ab9..bba1ad98bd 100644
--- a/source3/auth/auth_builtin.c
+++ b/source3/auth/auth_builtin.c
@@ -41,13 +41,8 @@ static NTSTATUS check_guest_security(const struct auth_context *auth_context,
 	NTSTATUS nt_status = NT_STATUS_LOGON_FAILURE;
 
 	if (!(user_info->internal_username.str 
-	      && *user_info->internal_username.str)) { 
-		if (make_server_info_guest(server_info)) {
-			nt_status = NT_STATUS_OK;
-		} else {
-			nt_status = NT_STATUS_NO_SUCH_USER;
-		}
-	}
+	      && *user_info->internal_username.str)) 
+		nt_status = make_server_info_guest(server_info);
 
 	return nt_status;
 }
diff --git a/source3/auth/auth_sam.c b/source3/auth/auth_sam.c
index 155370546a..50f1e5dac9 100644
--- a/source3/auth/auth_sam.c
+++ b/source3/auth/auth_sam.c
@@ -403,9 +403,9 @@ static NTSTATUS check_sam_security(const struct auth_context *auth_context,
 		return nt_status;
 	}
 
-	if (!make_server_info_sam(server_info, sampass)) {		
-		DEBUG(0,("failed to malloc memory for server_info\n"));
-		return NT_STATUS_NO_MEMORY;
+	if (!NT_STATUS_IS_OK(nt_status = make_server_info_sam(server_info, sampass))) {		
+		DEBUG(0,("failed to malloc memory for server_info ret: %s\n", nt_errstr(nt_status)));
+		return nt_status;
 	}
 
 	lm_hash = pdb_get_lanman_passwd((*server_info)->sam_account);
diff --git a/source3/auth/auth_server.c b/source3/auth/auth_server.c
index f227c9125c..0ed905e79c 100644
--- a/source3/auth/auth_server.c
+++ b/source3/auth/auth_server.c
@@ -375,9 +375,7 @@ use this machine as the password server.\n"));
 	if NT_STATUS_IS_OK(nt_status) {
 		struct passwd *pass = Get_Pwnam(user_info->internal_username.str);
 		if (pass) {
-			if (!make_server_info_pw(server_info, pass)) { 
-				nt_status = NT_STATUS_NO_MEMORY;
-			}
+			nt_status = make_server_info_pw(server_info, pass);
 		} else {
 			nt_status = NT_STATUS_NO_SUCH_USER;
 		}
diff --git a/source3/auth/auth_util.c b/source3/auth/auth_util.c
index f914d91871..51b8005634 100644
--- a/source3/auth/auth_util.c
+++ b/source3/auth/auth_util.c
@@ -26,6 +26,11 @@
 #define DBGC_CLASS DBGC_AUTH
 
 extern pstring global_myname;
+extern DOM_SID global_sid_World;
+extern DOM_SID global_sid_Network;
+extern DOM_SID global_sid_Builtin_Guests;
+extern DOM_SID global_sid_Authenticated_Users;
+
 
 /****************************************************************************
  Create a UNIX user on demand.
@@ -455,37 +460,298 @@ BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 			      auth_flags, True);
 }
 
+/****************************************************************************
+ prints a NT_USER_TOKEN to debug output.
+****************************************************************************/
+
+void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
+{
+	fstring sid_str;
+	int     i;
+	
+	DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
+		sid_to_string(sid_str, &token->user_sids[0]) ));
+	DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
+	for (i = 0; i < token->num_sids; i++)
+		DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i, 
+			sid_to_string(sid_str, &token->user_sids[i])));
+}
+
+/****************************************************************************
+ Create the SID list for this user.
+****************************************************************************/
+
+static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid, 
+				     int n_groupSIDs, DOM_SID *groupSIDs, 
+				     BOOL is_guest, NT_USER_TOKEN **token)
+{
+	NTSTATUS       nt_status = NT_STATUS_OK;
+	NT_USER_TOKEN *ptoken;
+	int i;
+	int sid_ndx;
+	
+	if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
+		DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
+		nt_status = NT_STATUS_NO_MEMORY;
+		return nt_status;
+	}
+
+	ZERO_STRUCTP(ptoken);
+
+	ptoken->num_sids = n_groupSIDs + 5;
+
+	if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
+		DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
+		nt_status = NT_STATUS_NO_MEMORY;
+		return nt_status;
+	}
+	
+	memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
+	
+	/*
+	 * Note - user SID *MUST* be first in token !
+	 * se_access_check depends on this.
+	 *
+	 * Primary group SID is second in token. Convention.
+	 */
+
+	sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
+	if (group_sid)
+		sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
+
+	/*
+	 * Finally add the "standard" SIDs.
+	 * The only difference between guest and "anonymous" (which we
+	 * don't really support) is the addition of Authenticated_Users.
+	 */
+
+	sid_copy(&ptoken->user_sids[2], &global_sid_World);
+	sid_copy(&ptoken->user_sids[3], &global_sid_Network);
+
+	if (is_guest)
+		sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
+	else
+		sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
+	
+	sid_ndx = 5; /* next available spot */
+
+	for (i = 0; i < n_groupSIDs; i++) {
+		int check_sid_idx;
+		for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
+			if (sid_equal(&ptoken->user_sids[check_sid_idx], 
+				      &groupSIDs[i])) {
+				break;
+			}
+		}
+		
+		if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
+			sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
+		} else {
+			ptoken->num_sids--;
+		}
+	}
+	
+	debug_nt_user_token(DBGC_AUTH, 10, ptoken);
+	
+	*token = ptoken;
+
+	return nt_status;
+}
+
+/****************************************************************************
+ Create the SID list for this user.
+****************************************************************************/
+
+NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
+{
+	DOM_SID user_sid;
+	DOM_SID group_sid;
+	DOM_SID *group_sids;
+	NT_USER_TOKEN *token;
+	int i;
+
+	if (!uid_to_sid(&user_sid, uid)) {
+		return NULL;
+	}
+	if (!gid_to_sid(&group_sid, gid)) {
+		return NULL;
+	}
+
+	group_sids   = malloc(sizeof(DOM_SID) * ngroups);
+	if (!group_sids) {
+		DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
+		return NULL;
+	}
+
+	for (i = 0; i < ngroups; i++) {
+		if (!gid_to_sid(&(group_sids)[i], (groups)[i])) {
+			DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
+			SAFE_FREE(group_sids);
+			return NULL;
+		}
+	}
+
+	if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid, 
+						  ngroups, group_sids, is_guest, &token))) {
+		SAFE_FREE(group_sids);
+		return NULL;
+	}
+
+	SAFE_FREE(group_sids);
+
+	return token;
+}
+
+/******************************************************************************
+ * this function returns the groups (SIDs) of the local SAM the user is in.
+ * If this samba server is a DC of the domain the user belongs to, it returns 
+ * both domain groups and local / builtin groups. If the user is in a trusted
+ * domain, or samba is a member server of a domain, then this function returns
+ * local and builtin groups the user is a member of. 
+ *
+ * currently this is a hack, as there is no sam implementation that is capable
+ * of groups.
+ ******************************************************************************/
+
+static NTSTATUS get_user_groups_from_local_sam(const DOM_SID *user_sid, 
+					       int *n_groups, DOM_SID **groups,	gid_t **unix_groups)
+{
+	uid_t             uid;
+	enum SID_NAME_USE snu;
+	fstring           str;
+	int               n_unix_groups;
+	int               i;
+	struct passwd    *usr;	
+	
+	*n_groups = 0;
+	*groups   = NULL;
+	
+	if (!sid_to_uid(user_sid,  &uid, &snu)) {
+		DEBUG(2, ("get_user_groups_from_local_sam: Failed to convert user SID %s to a uid!\n", sid_to_string(str, user_sid)));
+		return NT_STATUS_NO_SUCH_USER;
+	}
+
+	usr = getpwuid_alloc(uid);
+	
+	n_unix_groups = groups_max();
+	if ((*unix_groups = malloc( sizeof(gid_t) * groups_max() ) ) == NULL) {
+		DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
+		passwd_free(&usr);
+		return NT_STATUS_NO_MEMORY;
+	}
+	
+	if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
+		*unix_groups = realloc(unix_groups, sizeof(gid_t) * n_unix_groups);
+		if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
+			DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
+			SAFE_FREE(unix_groups);
+			passwd_free(&usr);
+			return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
+		}
+	}
+
+	passwd_free(&usr);
+	
+	DEBUG(5,("get_user_groups_from_local_sam: user is in the unix following groups\n"));
+	for (i = 0; i < n_unix_groups; i++)
+		DEBUGADD(5,("supplementary group gid:%ld\n",(long int)(*unix_groups)[i]));
+	
+	*groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
+	if (!*groups) {
+		DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
+		SAFE_FREE(unix_groups);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	*n_groups = n_unix_groups;
+
+	for (i = 0; i < *n_groups; i++) {
+		if (!gid_to_sid(&(*groups)[i], (*unix_groups)[i])) {
+			DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)unix_groups[i+1]));
+			SAFE_FREE(groups);
+			SAFE_FREE(unix_groups);
+			return NT_STATUS_NO_SUCH_USER;
+		}
+	}
+		     
+	return NT_STATUS_OK;
+}
+
 /***************************************************************************
  Make a user_info struct
 ***************************************************************************/
 
-static BOOL make_server_info(auth_serversupplied_info **server_info) 
+static NTSTATUS make_server_info(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass)
 {
 	*server_info = malloc(sizeof(**server_info));
 	if (!*server_info) {
 		DEBUG(0,("make_server_info: malloc failed!\n"));
-		return False;
+		return NT_STATUS_NO_MEMORY;
 	}
 	ZERO_STRUCTP(*server_info);
-	return True;
+
+	(*server_info)->sam_fill_level = SAM_FILL_ALL;
+	(*server_info)->sam_account    = sampass;
+
+	return NT_STATUS_OK;
 }
 
 /***************************************************************************
  Make (and fill) a user_info struct from a SAM_ACCOUNT
 ***************************************************************************/
 
-BOOL make_server_info_sam(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass) 
+NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info, 
+			      SAM_ACCOUNT *sampass)
 {
-	if (!make_server_info(server_info)) {
-		return False;
+	NTSTATUS nt_status = NT_STATUS_OK;
+	const DOM_SID *user_sid = pdb_get_user_sid(sampass);
+	const DOM_SID *group_sid = pdb_get_group_sid(sampass);
+	int       n_groupSIDs = 0;
+	DOM_SID  *groupSIDs   = NULL;
+	gid_t    *unix_groups = NULL;
+	NT_USER_TOKEN *token;
+	BOOL is_guest;
+	uint32 rid;
+
+	if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sampass))) {
+		return nt_status;
 	}
+	
+	if (!NT_STATUS_IS_OK(nt_status 
+			     = get_user_groups_from_local_sam(pdb_get_user_sid(sampass), 
+		&n_groupSIDs, &groupSIDs, &unix_groups)))
+	{
+		DEBUG(4,("get_user_groups_from_local_sam failed\n"));
+		free_server_info(server_info);
+		return nt_status;
+	}
+	
+	is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 
-	(*server_info)->sam_fill_level = SAM_FILL_ALL;
-	(*server_info)->sam_account = sampass;
+	if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
+							      n_groupSIDs, groupSIDs, is_guest, 
+							      &token)))
+	{
+		DEBUG(4,("create_nt_user_token failed\n"));
+		SAFE_FREE(groupSIDs);
+		SAFE_FREE(unix_groups);
+		free_server_info(server_info);
+		return nt_status;
+	}
+	
+	SAFE_FREE(groupSIDs);
+
+	(*server_info)->n_groups = n_groupSIDs;
+	(*server_info)->groups = unix_groups;
+
+	(*server_info)->ptok = token;
+	
+	debug_nt_user_token(DBGC_AUTH, 5, token);
 
 	DEBUG(5,("make_server_info_sam: made server info for user %s\n",
 		 pdb_get_username((*server_info)->sam_account)));
-	return True;
+
+	return nt_status;
 }
 
 /***************************************************************************
@@ -493,75 +759,42 @@ BOOL make_server_info_sam(auth_serversupplied_info **server_info, SAM_ACCOUNT *s
  to a SAM_ACCOUNT
 ***************************************************************************/
 
-BOOL make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
+NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 {
+	NTSTATUS nt_status;
 	SAM_ACCOUNT *sampass = NULL;
-	if (!NT_STATUS_IS_OK(pdb_init_sam_pw(&sampass, pwd))) {		
-		return False;
+	if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {		
+		return nt_status;
 	}
 	return make_server_info_sam(server_info, sampass);
 }
 
 /***************************************************************************
- Free a user_info struct
+ Make (and fill) a user_info struct for a guest login.
 ***************************************************************************/
 
-void free_user_info(auth_usersupplied_info **user_info)
+NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 {
-	DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
-	if (*user_info != NULL) {
-		if ((*user_info)->smb_name.str) {
-			DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
-		}
-		SAFE_FREE((*user_info)->smb_name.str);
-		SAFE_FREE((*user_info)->internal_username.str);
-		SAFE_FREE((*user_info)->client_domain.str);
-		SAFE_FREE((*user_info)->domain.str);
-		SAFE_FREE((*user_info)->wksta_name.str);
-		data_blob_free(&(*user_info)->lm_resp);
-		data_blob_free(&(*user_info)->nt_resp);
-		SAFE_FREE((*user_info)->interactive_password);
-		data_blob_clear_free(&(*user_info)->plaintext_password);
-		ZERO_STRUCT(**user_info);
+	NTSTATUS nt_status;
+	SAM_ACCOUNT *sampass = NULL;
+	DOM_SID guest_sid;
+
+	if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
+		return nt_status;
 	}
-	SAFE_FREE(*user_info);
-}
 
-/***************************************************************************
- Clear out a server_info struct that has been allocated
-***************************************************************************/
+	sid_copy(&guest_sid, get_global_sam_sid());
+	sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 
-void free_server_info(auth_serversupplied_info **server_info)
-{
-	if (*server_info != NULL) {
-		pdb_free_sam(&(*server_info)->sam_account);
-		
-		/* call pam_end here, unless we know we are keeping it */
-		delete_nt_token( &(*server_info)->ptok );
-		ZERO_STRUCT(**server_info);
+	if (!pdb_getsampwsid(sampass, &guest_sid)) {
+		return NT_STATUS_NO_SUCH_USER;
 	}
-	SAFE_FREE(*server_info);
-}
 
-/***************************************************************************
- Make a server_info struct for a guest user 
-***************************************************************************/
+	nt_status = make_server_info_sam(server_info, sampass);
 
-BOOL make_server_info_guest(auth_serversupplied_info **server_info) 
-{
-	struct passwd *pass = getpwnam_alloc(lp_guestaccount());
-	
-	if (pass) {
-		if (!make_server_info_pw(server_info, pass)) {
-			passwd_free(&pass);
-			return False;
-		}
-		(*server_info)->guest = True;
-		passwd_free(&pass);
-		return True;
-	}
-	DEBUG(0,("make_server_info_guest: getpwnam_alloc() failed on guest account!\n")); 
-	return False;
+	(*server_info)->guest = True;
+
+	return nt_status;
 }
 
 /***************************************************************************
@@ -589,6 +822,15 @@ NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 	uid_t uid;
 	gid_t gid;
 
+	int n_lgroupSIDs;
+	DOM_SID *lgroupSIDs   = NULL;
+
+	gid_t *unix_groups = NULL;
+	NT_USER_TOKEN *token;
+
+	DOM_SID *all_group_SIDs;
+	int i;
+
 	/* 
 	   Here is where we should check the list of
 	   trusted domains, and verify that the SID 
@@ -698,50 +940,116 @@ NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 		return NT_STATUS_NO_MEMORY;
 	}
 
-	if (!make_server_info_sam(server_info, sam_account)) { 
-		DEBUG(0, ("make_server_info_info3: make_server_info_sam failed!\n"));
+	if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sam_account))) {
+		DEBUG(4, ("make_server_info failed!\n"));
 		pdb_free_sam(&sam_account);
-		return NT_STATUS_NO_MEMORY;
+		return nt_status;
 	}
 
 	/* Store the user group information in the server_info 
 	   returned to the caller. */
 	
-	if (info3->num_groups2 != 0) {
-		int i;
-		NT_USER_TOKEN *ptok;
-		auth_serversupplied_info *pserver_info = *server_info;
-		
-		if ((pserver_info->ptok = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
-			DEBUG(0, ("domain_client_validate: out of memory allocating rid group membership\n"));
-			nt_status = NT_STATUS_NO_MEMORY;
-			free_server_info(server_info);
-			return nt_status;
-		}
-		
-		ptok = pserver_info->ptok;
-		ptok->num_sids = (size_t)info3->num_groups2;
-		
-		if ((ptok->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptok->num_sids )) == NULL) {
-			DEBUG(0, ("domain_client_validate: Out of memory allocating group SIDS\n"));
-			nt_status = NT_STATUS_NO_MEMORY;
-			free_server_info(server_info);
+	if (!NT_STATUS_IS_OK(nt_status 
+			     = get_user_groups_from_local_sam(&user_sid, 
+							      &n_lgroupSIDs, 
+							      &lgroupSIDs, 
+							      &unix_groups)))
+	{
+		DEBUG(4,("get_user_groups_from_local_sam failed\n"));
+		return nt_status;
+	}
+
+	(*server_info)->groups = unix_groups;
+	(*server_info)->n_groups = n_lgroupSIDs;
+	
+	/* Create a 'combined' list of all SIDs we might want in the SD */
+	all_group_SIDs   = malloc(sizeof(DOM_SID) * (n_lgroupSIDs+info3->num_groups2));
+	if (!all_group_SIDs) {
+		DEBUG(0, ("create_nt_token_info3: malloc() failed for DOM_SID list!\n"));
+		SAFE_FREE(lgroupSIDs);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* Copy the 'local' sids */
+	memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
+	SAFE_FREE(lgroupSIDs);
+
+	/* and create (by appending rids) the 'domain' sids */
+	for (i = 0; i < info3->num_groups2; i++) {
+		sid_copy(&all_group_SIDs[i+n_lgroupSIDs+1], &(info3->dom_sid.sid));
+		if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs+1], info3->gids[i].g_rid)) {
+			nt_status = NT_STATUS_INVALID_PARAMETER;
+			DEBUG(3,("create_nt_token_info3: could not append additional group rid 0x%x\n",
+				info3->gids[i].g_rid));			
+			SAFE_FREE(lgroupSIDs);
 			return nt_status;
 		}
-		
-		for (i = 0; i < ptok->num_sids; i++) {
-			sid_copy(&ptok->user_sids[i], &(info3->dom_sid.sid));
-			if (!sid_append_rid(&ptok->user_sids[i], info3->gids[i].g_rid)) {
-				nt_status = NT_STATUS_INVALID_PARAMETER;
-				free_server_info(server_info);
-				return nt_status;
-			}
-		}
 	}
+
+	/* Where are the 'global' sids... */
+
+	/* can the user be guest? if yes, where is it stored? */
+	if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(&user_sid, &group_sid,
+							     n_lgroupSIDs+info3->num_groups2, all_group_SIDs, 
+							      False, &token))) {
+		DEBUG(4,("create_nt_user_token failed\n"));
+		SAFE_FREE(all_group_SIDs);
+		return nt_status;
+	}
+
+	(*server_info)->ptok = token; 
+
+	SAFE_FREE(all_group_SIDs);
+	
+	debug_nt_user_token(DBGC_AUTH, 5, token);
+	
 	return NT_STATUS_OK;
 }
 
 /***************************************************************************
+ Free a user_info struct
+***************************************************************************/
+
+void free_user_info(auth_usersupplied_info **user_info)
+{
+	DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
+	if (*user_info != NULL) {
+		if ((*user_info)->smb_name.str) {
+			DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
+		}
+		SAFE_FREE((*user_info)->smb_name.str);
+		SAFE_FREE((*user_info)->internal_username.str);
+		SAFE_FREE((*user_info)->client_domain.str);
+		SAFE_FREE((*user_info)->domain.str);
+		SAFE_FREE((*user_info)->wksta_name.str);
+		data_blob_free(&(*user_info)->lm_resp);
+		data_blob_free(&(*user_info)->nt_resp);
+		SAFE_FREE((*user_info)->interactive_password);
+		data_blob_clear_free(&(*user_info)->plaintext_password);
+		ZERO_STRUCT(**user_info);
+	}
+	SAFE_FREE(*user_info);
+}
+
+/***************************************************************************
+ Clear out a server_info struct that has been allocated
+***************************************************************************/
+
+void free_server_info(auth_serversupplied_info **server_info)
+{
+	DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
+	if (*server_info != NULL) {
+		pdb_free_sam(&(*server_info)->sam_account);
+
+		/* call pam_end here, unless we know we are keeping it */
+		delete_nt_token( &(*server_info)->ptok );
+		SAFE_FREE((*server_info)->groups);
+		ZERO_STRUCT(**server_info);
+	}
+	SAFE_FREE(*server_info);
+}
+
+/***************************************************************************
  Make an auth_methods struct
 ***************************************************************************/
 
diff --git a/source3/auth/auth_winbind.c b/source3/auth/auth_winbind.c
index 5bdccd39f3..10788721fd 100644
--- a/source3/auth/auth_winbind.c
+++ b/source3/auth/auth_winbind.c
@@ -4,7 +4,7 @@
    Winbind authentication mechnism
 
    Copyright (C) Tim Potter 2000
-   Copyright (C) Andrew Bartlett 2001
+   Copyright (C) Andrew Bartlett 2001 - 2002
    
    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