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-rw-r--r--source3/smbd/password.c146
-rw-r--r--source3/smbd/service.c287
2 files changed, 238 insertions, 195 deletions
diff --git a/source3/smbd/password.c b/source3/smbd/password.c
index b2cf3106cb..6eaa7b7fbb 100644
--- a/source3/smbd/password.c
+++ b/source3/smbd/password.c
@@ -313,7 +313,9 @@ int register_vuid(auth_serversupplied_info *server_info, char *smb_name)
/* Register a home dir service for this user */
if ((!vuser->guest) && vuser->unix_homedir && *(vuser->unix_homedir)
&& (lp_servicenumber(vuser->user.unix_name) < 0)) {
- add_home_service(vuser->user.unix_name, vuser->unix_homedir);
+ vuser->homes_snum = add_home_service(vuser->user.unix_name, vuser->user.unix_name, vuser->unix_homedir);
+ } else {
+ vuser->homes_snum = -1;
}
return vuser->vuid;
@@ -472,42 +474,19 @@ static char *validate_group(char *group, DATA_BLOB password,int snum)
****************************************************************************/
BOOL authorise_login(int snum,char *user, DATA_BLOB password,
- BOOL *guest,BOOL *force,uint16 vuid)
+ BOOL *guest, BOOL *force)
{
BOOL ok = False;
- user_struct *vuser = get_valid_user_struct(vuid);
-
+
#if DEBUG_PASSWORD
- DEBUG(100,("authorise_login: checking authorisation on user=%s pass=%s vuid=%d\n",
- user,password.data, vuid));
+ DEBUG(100,("authorise_login: checking authorisation on user=%s pass=%s\n",
+ user,password.data));
#endif
*guest = False;
if (GUEST_ONLY(snum))
*force = True;
-
- if (!GUEST_ONLY(snum) && (lp_security() > SEC_SHARE)) {
-
- /*
- * We should just use the given vuid from a sessionsetup_and_X.
- */
-
- if (!vuser) {
- DEBUG(1,("authorise_login: refusing user '%s' with no session setup\n", user));
- return False;
- }
-
- if ((!vuser->guest && user_ok(vuser->user.unix_name,snum)) ||
- (vuser->guest && GUEST_OK(snum))) {
- fstrcpy(user,vuser->user.unix_name);
- *guest = vuser->guest;
- DEBUG(3,("authorise_login: ACCEPTED: validated based on vuid as %sguest \
-(user=%s)\n", vuser->guest ? "" : "non-", user));
- return True;
- }
- }
-
/* there are several possibilities:
1) login as the given user with given password
2) login as a previously registered username with the given password
@@ -520,84 +499,61 @@ BOOL authorise_login(int snum,char *user, DATA_BLOB password,
if the service is guest_only then steps 1 to 5 are skipped
*/
- if (!(GUEST_ONLY(snum) && GUEST_OK(snum))) {
- /* check for a previously registered guest username */
- if (!ok && (vuser != 0) && vuser->guest) {
- if (user_ok(vuser->user.unix_name,snum) &&
- password_ok(vuser->user.unix_name, password)) {
- fstrcpy(user, vuser->user.unix_name);
- *guest = False;
- DEBUG(3,("authorise_login: ACCEPTED: given password with registered user %s\n", user));
+ /* now check the list of session users */
+ if (!ok) {
+ char *auser;
+ char *user_list = strdup(session_users);
+ if (!user_list)
+ return(False);
+
+ for (auser=strtok(user_list,LIST_SEP); !ok && auser;
+ auser = strtok(NULL,LIST_SEP)) {
+ fstring user2;
+ fstrcpy(user2,auser);
+ if (!user_ok(user2,snum))
+ continue;
+
+ if (password_ok(user2,password)) {
ok = True;
+ fstrcpy(user,user2);
+ DEBUG(3,("authorise_login: ACCEPTED: session list username (%s) \
+and given password ok\n", user));
}
}
-
- /* now check the list of session users */
- if (!ok) {
- char *auser;
- char *user_list = strdup(session_users);
- if (!user_list)
- return(False);
-
- for (auser=strtok(user_list,LIST_SEP); !ok && auser;
- auser = strtok(NULL,LIST_SEP)) {
+
+ SAFE_FREE(user_list);
+ }
+
+ /* check the user= fields and the given password */
+ if (!ok && lp_username(snum)) {
+ char *auser;
+ pstring user_list;
+ StrnCpy(user_list,lp_username(snum),sizeof(pstring));
+
+ pstring_sub(user_list,"%S",lp_servicename(snum));
+
+ for (auser=strtok(user_list,LIST_SEP); auser && !ok;
+ auser = strtok(NULL,LIST_SEP)) {
+ if (*auser == '@') {
+ auser = validate_group(auser+1,password,snum);
+ if (auser) {
+ ok = True;
+ fstrcpy(user,auser);
+ DEBUG(3,("authorise_login: ACCEPTED: group username \
+and given password ok (%s)\n", user));
+ }
+ } else {
fstring user2;
fstrcpy(user2,auser);
- if (!user_ok(user2,snum))
- continue;
-
- if (password_ok(user2,password)) {
+ if (user_ok(user2,snum) && password_ok(user2,password)) {
ok = True;
fstrcpy(user,user2);
- DEBUG(3,("authorise_login: ACCEPTED: session list username (%s) \
-and given password ok\n", user));
- }
- }
-
- SAFE_FREE(user_list);
- }
-
- /* check for a previously validated username/password pair */
- if (!ok && (lp_security() > SEC_SHARE) && (vuser != 0) && !vuser->guest &&
- user_ok(vuser->user.unix_name,snum)) {
- fstrcpy(user,vuser->user.unix_name);
- *guest = False;
- DEBUG(3,("authorise_login: ACCEPTED: validated uid (%s) as non-guest\n",
- user));
- ok = True;
- }
-
- /* check the user= fields and the given password */
- if (!ok && lp_username(snum)) {
- char *auser;
- pstring user_list;
- StrnCpy(user_list,lp_username(snum),sizeof(pstring));
-
- pstring_sub(user_list,"%S",lp_servicename(snum));
-
- for (auser=strtok(user_list,LIST_SEP); auser && !ok;
- auser = strtok(NULL,LIST_SEP)) {
- if (*auser == '@') {
- auser = validate_group(auser+1,password,snum);
- if (auser) {
- ok = True;
- fstrcpy(user,auser);
- DEBUG(3,("authorise_login: ACCEPTED: group username \
-and given password ok (%s)\n", user));
- }
- } else {
- fstring user2;
- fstrcpy(user2,auser);
- if (user_ok(user2,snum) && password_ok(user2,password)) {
- ok = True;
- fstrcpy(user,user2);
- DEBUG(3,("authorise_login: ACCEPTED: user list username \
+ DEBUG(3,("authorise_login: ACCEPTED: user list username \
and given password ok (%s)\n", user));
- }
}
}
}
- } /* not guest only */
+ }
/* check for a normal guest connection */
if (!ok && GUEST_OK(snum)) {
diff --git a/source3/smbd/service.c b/source3/smbd/service.c
index af70e7839e..1bb55fbcf8 100644
--- a/source3/smbd/service.c
+++ b/source3/smbd/service.c
@@ -78,7 +78,7 @@ BOOL set_current_service(connection_struct *conn,BOOL do_chdir)
Add a home service. Returns the new service number or -1 if fail.
****************************************************************************/
-int add_home_service(const char *service, const char *homedir)
+int add_home_service(const char *service, const char *username, const char *homedir)
{
int iHomeService;
@@ -104,7 +104,7 @@ int add_home_service(const char *service, const char *homedir)
}
}
- lp_add_home(service, iHomeService, homedir);
+ lp_add_home(service, iHomeService, username, homedir);
return lp_servicenumber(service);
@@ -127,7 +127,7 @@ int find_service(fstring service)
/* now handle the special case of a home directory */
if (iService < 0)
{
- char *phome_dir = get_user_service_home_dir(service);
+ char *phome_dir = get_user_home_dir(service);
if(!phome_dir)
{
@@ -136,13 +136,13 @@ int find_service(fstring service)
* be a Windows to unix mapped user name.
*/
if(map_username(service))
- phome_dir = get_user_service_home_dir(service);
+ phome_dir = get_user_home_dir(service);
}
DEBUG(3,("checking for home directory %s gave %s\n",service,
phome_dir?phome_dir:"(NULL)"));
- iService = add_home_service(service,phome_dir);
+ iService = add_home_service(service,service /* 'username' */, phome_dir);
}
/* If we still don't have a service, attempt to add it as a printer. */
@@ -218,7 +218,7 @@ int find_service(fstring service)
do some basic sainity checks on the share.
This function modifies dev, ecode.
****************************************************************************/
-static NTSTATUS share_sanity_checks(int snum, const char* service, pstring dev)
+static NTSTATUS share_sanity_checks(int snum, pstring dev)
{
if (!lp_snum_ok(snum) ||
@@ -228,7 +228,7 @@ static NTSTATUS share_sanity_checks(int snum, const char* service, pstring dev)
}
/* you can only connect to the IPC$ service as an ipc device */
- if (strequal(service,"IPC$") || strequal(service,"ADMIN$"))
+ if (strequal(lp_fstype(snum), "IPC"))
pstrcpy(dev,"IPC");
if (dev[0] == '?' || !dev[0]) {
@@ -319,89 +319,26 @@ static void set_admin_user(connection_struct *conn)
}
/****************************************************************************
- Make a connection to a service.
- *
- * @param service (May be modified to canonical form???)
+ Make a connection, given the snum to connect to, and the vuser of the
+ connecting user if appropriate.
****************************************************************************/
-connection_struct *make_connection(char *service, DATA_BLOB password,
- char *dev, uint16 vuid, NTSTATUS *status)
+static connection_struct *make_connection_snum(int snum, user_struct *vuser,
+ DATA_BLOB password,
+ char *dev, NTSTATUS *status)
{
- int snum;
struct passwd *pass = NULL;
BOOL guest = False;
BOOL force = False;
connection_struct *conn;
- uid_t euid;
struct stat st;
fstring user;
- ZERO_STRUCT(user);
+ *user = 0;
- /* This must ONLY BE CALLED AS ROOT. As it exits this function as root. */
- if (!non_root_mode() && (euid = geteuid()) != 0) {
- DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot (%u)\n", (unsigned int)euid ));
- smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
- }
-
- strlower(service);
-
- snum = find_service(service);
-
- if (snum < 0) {
- if (strequal(service,"IPC$") || strequal(service,"ADMIN$")) {
- DEBUG(3,("refusing IPC connection\n"));
- *status = NT_STATUS_ACCESS_DENIED;
- return NULL;
- }
-
- DEBUG(0,("%s (%s) couldn't find service %s\n",
- remote_machine, client_addr(), service));
- *status = NT_STATUS_BAD_NETWORK_NAME;
- return NULL;
- }
-
- if (strequal(service,HOMES_NAME)) {
- if(lp_security() != SEC_SHARE) {
- if (validated_username(vuid)) {
- fstring unix_username;
- fstrcpy(unix_username,validated_username(vuid));
- return make_connection(unix_username,
- password,dev,vuid,status);
- }
- } else {
- /* Security = share. Try with current_user_info.smb_name
- * as the username. */
- if (* current_user_info.smb_name) {
- fstring unix_username;
- fstrcpy(unix_username,
- current_user_info.smb_name);
- map_username(unix_username);
- return make_connection(unix_username,
- password,dev,vuid,status);
- }
- }
- }
-
- if (NT_STATUS_IS_ERR(*status = share_sanity_checks(snum, service, dev))) {
+ if (NT_STATUS_IS_ERR(*status = share_sanity_checks(snum, dev))) {
return NULL;
}
- /* add it as a possible user name if we
- are in share mode security */
- if (lp_security() == SEC_SHARE) {
- add_session_user(service);
- }
-
-
- /* shall we let them in? */
- if (!authorise_login(snum,user,password,&guest,&force,vuid)) {
- DEBUG( 2, ( "Invalid username/password for %s [%s]\n", service, user ) );
- *status = NT_STATUS_WRONG_PASSWORD;
- return NULL;
- }
-
- add_session_user(user);
-
conn = conn_new();
if (!conn) {
DEBUG(0,("Couldn't find free connection.\n"));
@@ -409,20 +346,70 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
return NULL;
}
- /* find out some info about the user */
- pass = smb_getpwnam(user,True);
+ if (lp_guest_only(snum)) {
+ char *guestname = lp_guestaccount();
+ guest = True;
+ force = True;
+ pass = getpwnam_alloc(guestname);
+ if (!pass) {
+ DEBUG(0,("authorise_login: Invalid guest account %s??\n",guestname));
+ *status = NT_STATUS_NO_SUCH_USER;
+ conn_free(conn);
+ return NULL;
+ }
+ fstrcpy(user,pass->pw_name);
+ conn->force_user = True;
+ string_set(&conn->user,pass->pw_name);
+ DEBUG(3,("Guest only user %s\n",user));
+ } else if (vuser) {
+ if (vuser->guest) {
+ if (!lp_guest_ok(snum)) {
+ DEBUG(2, ("guest user (from session setup) not permitted to access this share (%s)", lp_servicename(snum)));
+ *status = NT_STATUS_ACCESS_DENIED;
+ conn_free(conn);
+ return NULL;
+ }
+ } else {
+ if (!user_ok(vuser->user.unix_name, snum)) {
+ DEBUG(2, ("user '%s' (from session setup) not permitted to access this share (%s)", vuser->user.unix_name, lp_servicename(snum)));
+ *status = NT_STATUS_ACCESS_DENIED;
+ conn_free(conn);
+ return NULL;
+ }
+ }
+ conn->vuid = vuser->vuid;
+ conn->uid = vuser->uid;
+ conn->gid = vuser->gid;
+ string_set(&conn->user,vuser->user.unix_name);
+ fstrcpy(user,vuser->user.unix_name);
+ guest = vuser->guest;
+ } else if (lp_security() == SEC_SHARE) {
+ /* add it as a possible user name if we
+ are in share mode security */
+ add_session_user(lp_servicename(snum));
+ /* shall we let them in? */
+ if (!authorise_login(snum,user,password,&guest,&force)) {
+ DEBUG( 2, ( "Invalid username/password for %s [%s]\n",
+ lp_servicename(snum), user ) );
+ *status = NT_STATUS_WRONG_PASSWORD;
+ return NULL;
+ }
+ pass = Get_Pwnam(user);
+ conn->force_user = force;
+ conn->uid = pass->pw_uid;
+ conn->gid = pass->pw_gid;
+ string_set(&conn->user, pass->pw_name);
+ fstrcpy(user, pass->pw_name);
- if (pass == NULL) {
- DEBUG(0,( "Couldn't find account %s\n",user));
- *status = NT_STATUS_NO_SUCH_USER;
+ } else {
+ DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
conn_free(conn);
+ *status = NT_STATUS_ACCESS_DENIED;
return NULL;
}
- conn->force_user = force;
- conn->vuid = vuid;
- conn->uid = pass->pw_uid;
- conn->gid = pass->pw_gid;
+ add_session_user(user);
+
safe_strcpy(conn->client_address, client_addr(),
sizeof(conn->client_address)-1);
conn->num_files_open = 0;
@@ -455,18 +442,21 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
pstrcpy(fuser,lp_force_user(snum));
/* Allow %S to be used by force user. */
- pstring_sub(fuser,"%S",service);
+ pstring_sub(fuser,"%S",lp_servicename(snum));
- pass2 = (struct passwd *)Get_Pwnam_Modify(fuser);
+ pass2 = (struct passwd *)Get_Pwnam(fuser);
if (pass2) {
conn->uid = pass2->pw_uid;
conn->gid = pass2->pw_gid;
- string_set(&conn->user,fuser);
- fstrcpy(user,fuser);
+ string_set(&conn->user,pass2->pw_name);
+ fstrcpy(user,pass2->pw_name);
conn->force_user = True;
- DEBUG(3,("Forced user %s\n",fuser));
+ DEBUG(3,("Forced user %s\n",user));
} else {
+ conn_free(conn);
DEBUG(1,("Couldn't find user %s\n",fuser));
+ *status = NT_STATUS_NO_SUCH_USER;
+ return NULL;
}
}
@@ -488,7 +478,7 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
BOOL user_must_be_member = False;
StrnCpy(tmp_gname,lp_force_group(snum),sizeof(pstring)-1);
-
+
if (tmp_gname[0] == '+') {
user_must_be_member = True;
StrnCpy(gname,&tmp_gname[1],sizeof(pstring)-2);
@@ -496,7 +486,7 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
StrnCpy(gname,tmp_gname,sizeof(pstring)-1);
}
/* default service may be a group name */
- pstring_sub(gname,"%S",service);
+ pstring_sub(gname,"%S",lp_servicename(snum));
gid = nametogid(gname);
if (gid != (gid_t)-1) {
@@ -516,6 +506,8 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
DEBUG(3,("Forced group %s\n",gname));
}
} else {
+ conn_free(conn);
+ *status = NT_STATUS_NO_SUCH_GROUP;
DEBUG(1,("Couldn't find group %s\n",gname));
}
}
@@ -549,14 +541,14 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
*/
{
- BOOL can_write = share_access_check(conn, snum, vuid, FILE_WRITE_DATA);
+ BOOL can_write = share_access_check(conn, snum, vuser, FILE_WRITE_DATA);
if (!can_write) {
- if (!share_access_check(conn, snum, vuid, FILE_READ_DATA)) {
+ if (!share_access_check(conn, snum, vuser, FILE_READ_DATA)) {
/* No access, read or write. */
*status = NT_STATUS_ACCESS_DENIED;
DEBUG(0,( "make_connection: connection to %s denied due to security descriptor.\n",
- service ));
+ lp_servicename(snum)));
conn_free(conn);
return NULL;
} else {
@@ -610,9 +602,9 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
*status = NT_STATUS_LOGON_FAILURE;
return NULL;
}
-
+
/* Remember that a different vuid can connect later without these checks... */
-
+
/* Preexecs are done here as they might make the dir we are to ChDir to below */
/* execute any "preexec = " line */
if (*lp_preexec(SNUM(conn))) {
@@ -630,7 +622,7 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
return NULL;
}
}
-
+
#if CHECK_PATH_ON_TCONX
/* win2000 does not check the permissions on the directory
during the tree connect, instead relying on permission
@@ -695,7 +687,7 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
/* Invoke VFS make connection hook */
if (conn->vfs_ops.connect) {
- if (conn->vfs_ops.connect(conn, service, user) < 0) {
+ if (conn->vfs_ops.connect(conn, lp_servicename(snum), user) < 0) {
DEBUG(0,("make_connection: VFS make connection failed!\n"));
*status = NT_STATUS_UNSUCCESSFUL;
change_to_root_user();
@@ -710,6 +702,101 @@ connection_struct *make_connection(char *service, DATA_BLOB password,
return(conn);
}
+/****************************************************************************
+ Make a connection to a service.
+ *
+ * @param service
+****************************************************************************/
+
+connection_struct *make_connection(const char *service_in, DATA_BLOB password,
+ char *dev, uint16 vuid, NTSTATUS *status)
+{
+ uid_t euid;
+ user_struct *vuser = NULL;
+ pstring service;
+ int snum = -1;
+
+ /* This must ONLY BE CALLED AS ROOT. As it exits this function as root. */
+ if (!non_root_mode() && (euid = geteuid()) != 0) {
+ DEBUG(0,("make_connection: PANIC ERROR. Called as nonroot (%u)\n", (unsigned int)euid ));
+ smb_panic("make_connection: PANIC ERROR. Called as nonroot\n");
+ }
+
+ if(lp_security() != SEC_SHARE) {
+ vuser = get_valid_user_struct(vuid);
+ if (!vuser) {
+ DEBUG(1,("make_connection: refusing to connect with no session setup\n"));
+ return NULL;
+ }
+ }
+
+ /* Logic to try and connect to the correct [homes] share, preferably without too many
+ getpwnam() lookups. This is particulary nasty for winbind usernames, where the
+ share name isn't the same as unix username.
+
+ The snum of the homes share is stored on the vuser at session setup time.
+ */
+
+ if (strequal(service_in,HOMES_NAME)) {
+ if(lp_security() != SEC_SHARE) {
+ DATA_BLOB no_pw = data_blob(NULL, 0);
+ if (vuser->homes_snum != -1) {
+ DEBUG(5, ("making a connection to [homes] service created at session setup time\n"));
+ return make_connection_snum(vuser->homes_snum,
+ vuser, no_pw,
+ dev, status);
+ }
+ } else {
+ /* Security = share. Try with current_user_info.smb_name
+ * as the username. */
+ if (*current_user_info.smb_name) {
+ fstring unix_username;
+ fstrcpy(unix_username,
+ current_user_info.smb_name);
+ map_username(unix_username);
+ snum = find_service(unix_username);
+ }
+ if (snum != -1) {
+ DEBUG(5, ("making a connection to 'homes' service %s based on security=share\n", service_in));
+ return make_connection_snum(snum, NULL,
+ password,
+ dev, status);
+ }
+ }
+ } else if ((lp_security() != SEC_SHARE) && (vuser->homes_snum != -1)
+ && strequal(service, lp_servicename(vuser->homes_snum))) {
+ DATA_BLOB no_pw = data_blob(NULL, 0);
+ DEBUG(5, ("making a connection to 'homes' service [%s] created at session setup time\n", service));
+ return make_connection_snum(vuser->homes_snum,
+ vuser, no_pw,
+ dev, status);
+ }
+
+ pstrcpy(service, service_in);
+
+ strlower(service);
+
+ snum = find_service(service);
+
+ if (snum < 0) {
+ if (strequal(service,"IPC$") || strequal(service,"ADMIN$")) {
+ DEBUG(3,("refusing IPC connection to %s\n", service));
+ *status = NT_STATUS_ACCESS_DENIED;
+ return NULL;
+ }
+
+ DEBUG(0,("%s (%s) couldn't find service %s\n",
+ remote_machine, client_addr(), service));
+ *status = NT_STATUS_BAD_NETWORK_NAME;
+ return NULL;
+ }
+
+ DEBUG(5, ("making a connection to 'normal' service %s\n", service));
+
+ return make_connection_snum(snum, vuser,
+ password,
+ dev, status);
+}
/****************************************************************************
close a cnum
generated by cgit (git 2.34.1) at 2024-12-14 02:44:48 +0000