a minimal change to get appliance mode to work with winbindd

we needed to accept usernames of the form DOMAIN/user, which means we
needed to pass the domain to a getpwnam() like routine in certain
critical spots.

What I'd rather do is get rid of "char *user" everywhere and use the
new userdom_struct, but that will have to wait a few days.

source/include/proto.h

@@ -288,6 +288,8 @@ char *get_user_home_dir(char *user);
 BOOL map_username(char *user);
 struct passwd *Get_Pwnam(char *user,BOOL allow_change);
 BOOL user_in_list(char *user,char *list);
+struct passwd *smb_getpwnam(char *user, char *domain, BOOL allow_change);
+int smb_initgroups(char *user, char *domain, gid_t group);
 
 /*The following definitions come from  lib/util.c  */
 
@@ -2039,7 +2041,7 @@ void init_net_user_info3(NET_USER_INFO_3 *usr,
 	DOM_GID *gids,
 	uint32 user_flgs,
 
-	char sess_key[16],
+	char *sess_key,
 
 	char *logon_srv,
 	char *logon_dom,
@@ -3182,8 +3184,11 @@ BOOL set_challenge(unsigned char *challenge);
 user_struct *get_valid_user_struct(uint16 vuid);
 void invalidate_vuid(uint16 vuid);
 char *validated_username(uint16 vuid);
-int setup_groups(char *user, uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups);
-uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, BOOL guest);
+char *validated_domain(uint16 vuid);
+int setup_groups(char *user, char *domain, 
+		 uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups);
+uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, 
+		     char *domain,BOOL guest);
 void add_session_user(char *user);
 BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8);
 BOOL smb_password_ok(struct smb_passwd *smb_pass, uchar chal[8],

source/lib/username.c

@@ -423,3 +423,38 @@ static struct passwd * uname_string_combinations(char *s,struct passwd * (*fn)(c
   }
   return(NULL);
 }
+
+
+/****************************************************************************
+these wrappers allow appliance mode to work. In appliance mode the username
+takes the form DOMAIN/user
+****************************************************************************/
+struct passwd *smb_getpwnam(char *user, char *domain, BOOL allow_change)
+{
+	struct passwd *pw;
+	fstring userdom;
+
+	pw = Get_Pwnam(user, allow_change);
+	if (pw || !domain || !*domain) return pw;
+
+	slprintf(userdom, sizeof(userdom), "%s/%s", domain, user);
+
+	DEBUG(4,("smb_getpwnam trying userdom %s\n", userdom));
+
+	return Get_Pwnam(userdom, allow_change);
+}
+
+int smb_initgroups(char *user, char *domain, gid_t group)
+{
+	fstring userdom;
+	int ret;
+
+	ret = initgroups(user, group);
+	if (ret==0 || !domain || !*domain) return ret;
+
+	slprintf(userdom, sizeof(userdom), "%s/%s", domain, user);
+
+	DEBUG(4,("smb_initgroups trying userdom %s\n", userdom));
+
+	return initgroups(userdom, group);
+}

source/smbd/password.c

@@ -137,23 +137,35 @@ return a validated username
 ****************************************************************************/
 char *validated_username(uint16 vuid)
 {
-  user_struct *vuser = get_valid_user_struct(vuid);
-  if (vuser == NULL)
-    return 0;
-  return(vuser->user.unix_name);
+	user_struct *vuser = get_valid_user_struct(vuid);
+	if (vuser == NULL)
+		return 0;
+	return(vuser->user.unix_name);
+}
+
+/****************************************************************************
+return a validated domain
+****************************************************************************/
+char *validated_domain(uint16 vuid)
+{
+	user_struct *vuser = get_valid_user_struct(vuid);
+	if (vuser == NULL)
+		return 0;
+	return(vuser->user.domain);
 }
 
 
 /****************************************************************************
 Setup the groups a user belongs to.
 ****************************************************************************/
-int setup_groups(char *user, uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
+int setup_groups(char *user, char *domain, 
+		 uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
 {
 	int i,ngroups;
 	gid_t grp = 0;
 	gid_t *groups = NULL;
 
-	if (-1 == initgroups(user,gid))
+	if (-1 == smb_initgroups(user,domain,gid))
 	{
 		DEBUG(0,("Unable to initgroups. Error was %s\n", strerror(errno) ));
 		if (getuid() == 0)
@@ -199,7 +211,8 @@ register a uid/name pair as being valid and that a valid password
 has been given. vuid is biased by an offset. This allows us to
 tell random client vuid's (normally zero) from valid vuids.
 ****************************************************************************/
-uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, BOOL guest)
+uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, 
+		     char *domain,BOOL guest)
 {
   user_struct *vuser;
   struct passwd *pwfile; /* for getting real name from passwd file */
@@ -248,13 +261,14 @@ uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name,
   vuser->guest = guest;
   fstrcpy(vuser->user.unix_name,unix_name);
   fstrcpy(vuser->user.smb_name,requested_name);
+  fstrcpy(vuser->user.domain,domain);
 
   vuser->n_groups = 0;
   vuser->groups  = NULL;
 
   /* Find all the groups this uid is in and store them. 
      Used by become_user() */
-  setup_groups(unix_name,uid,gid,
+  setup_groups(unix_name,domain,uid,gid,
 	       &vuser->n_groups,
 	       &vuser->groups);
 

source/smbd/reply.c

@@ -944,7 +944,7 @@ int reply_sesssetup_and_X(connection_struct *conn, char *inbuf,char *outbuf,int
     }
   }
 
-  if (!Get_Pwnam(user,True)) {
+  if (!smb_getpwnam(user,domain,True)) {
     DEBUG(3,("No such user %s - using guest account\n",user));
     pstrcpy(user,lp_guestaccount(-1));
     guest = True;
@@ -979,7 +979,7 @@ int reply_sesssetup_and_X(connection_struct *conn, char *inbuf,char *outbuf,int
      user we should become.
      */
   {
-    const struct passwd *pw = Get_Pwnam(user,False);
+    const struct passwd *pw = smb_getpwnam(user,domain,False);
     if (!pw) {
       DEBUG(1,("Username %s is invalid on this system\n",user));
       return bad_password_error(inbuf,outbuf);
@@ -993,7 +993,7 @@ int reply_sesssetup_and_X(connection_struct *conn, char *inbuf,char *outbuf,int
 
   /* register the name and uid as being validated, so further connections
      to a uid can get through without a password, on the same VC */
-  sess_vuid = register_vuid(uid,gid,user,sesssetup_user,guest);
+  sess_vuid = register_vuid(uid,gid,user,sesssetup_user,domain,guest);
  
   SSVAL(outbuf,smb_uid,sess_vuid);
   SSVAL(inbuf,smb_uid,sess_vuid);

source/smbd/service.c

@@ -293,7 +293,7 @@ connection_struct *make_connection(char *service,char *user,char *password, int
 	}
 
 	/* find out some info about the user */
-	pass = Get_Pwnam(user,True);
+	pass = smb_getpwnam(user,validated_domain(vuid),True);
 
 	if (pass == NULL) {
 		DEBUG(0,( "Couldn't find account %s\n",user));
@@ -504,7 +504,7 @@ connection_struct *make_connection(char *service,char *user,char *password, int
 	if (!IS_IPC(conn)) {
 		/* Find all the groups this uid is in and
 		   store them. Used by become_user() */
-		setup_groups(conn->user,conn->uid,conn->gid,
+		setup_groups(conn->user,validated_domain(vuid),conn->uid,conn->gid,
 			     &conn->ngroups,&conn->groups);
 		
 		/* check number of connections */