NTSTATUS make_session_info_from_username(TALLOC_CTX *mem_ctx,
const char *username,
bool is_guest,
struct auth_session_info **session_info)
{
struct passwd *pwd;
NTSTATUS status;
struct auth_serversupplied_info *result;
pwd = Get_Pwnam_alloc(talloc_tos(), username);
if (pwd == NULL) {
return NT_STATUS_NO_SUCH_USER;
}
status = make_server_info_pw(&result, pwd->pw_name, pwd);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
result->nss_token = true;
result->guest = is_guest;
/* Now turn the server_info into a session_info with the full token etc */
status = create_local_token(mem_ctx, result, NULL, pwd->pw_name, session_info);
TALLOC_FREE(result);
TALLOC_FREE(pwd);
return status;
}
NTSTATUS make_serverinfo_from_username(TALLOC_CTX *mem_ctx,
const char *username,
bool is_guest,
struct auth_serversupplied_info **presult)
{
struct auth_serversupplied_info *result;
struct passwd *pwd;
NTSTATUS status;
pwd = Get_Pwnam_alloc(talloc_tos(), username);
if (pwd == NULL) {
return NT_STATUS_NO_SUCH_USER;
}
status = make_server_info_pw(&result, pwd->pw_name, pwd);
TALLOC_FREE(pwd);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
result->nss_token = true;
result->guest = is_guest;
status = create_local_token(result);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(result);
return status;
}
*presult = talloc_steal(mem_ctx, result);
return NT_STATUS_OK;
}
NTSTATUS make_server_info_sam(struct auth_serversupplied_info **server_info,
struct samu *sampass)
{
struct passwd *pwd;
struct auth_serversupplied_info *result;
const char *username = pdb_get_username(sampass);
NTSTATUS status;
if ( !(result = make_server_info(NULL)) ) {
return NT_STATUS_NO_MEMORY;
}
if ( !(pwd = Get_Pwnam_alloc(result, username)) ) {
DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
pdb_get_username(sampass)));
TALLOC_FREE(result);
return NT_STATUS_NO_SUCH_USER;
}
status = samu_to_SamInfo3(result, sampass, lp_netbios_name(),
&result->info3, &result->extra);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(result);
return status;
}
result->unix_name = pwd->pw_name;
/* Ensure that we keep pwd->pw_name, because we will free pwd below */
talloc_steal(result, pwd->pw_name);
result->utok.gid = pwd->pw_gid;
result->utok.uid = pwd->pw_uid;
TALLOC_FREE(pwd);
if (IS_DC && is_our_machine_account(username)) {
/*
* This is a hack of monstrous proportions.
* If we know it's winbindd talking to us,
* we know we must never recurse into it,
* so turn off contacting winbindd for this
* entire process. This will get fixed when
* winbindd doesn't need to talk to smbd on
* a PDC. JRA.
*/
(void)winbind_off();
DEBUG(10, ("make_server_info_sam: our machine account %s "
"turning off winbindd requests.\n", username));
}
DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
pdb_get_username(sampass), result->unix_name));
*server_info = result;
return NT_STATUS_OK;
}
static NTSTATUS get_guest_info3(TALLOC_CTX *mem_ctx,
struct netr_SamInfo3 *info3)
{
const char *guest_account = lp_guestaccount();
struct dom_sid domain_sid;
struct passwd *pwd;
const char *tmp;
pwd = Get_Pwnam_alloc(mem_ctx, guest_account);
if (pwd == NULL) {
DEBUG(0,("SamInfo3_for_guest: Unable to locate guest "
"account [%s]!\n", guest_account));
return NT_STATUS_NO_SUCH_USER;
}
/* Set account name */
tmp = talloc_strdup(mem_ctx, pwd->pw_name);
if (tmp == NULL) {
return NT_STATUS_NO_MEMORY;
}
init_lsa_String(&info3->base.account_name, tmp);
/* Set domain name */
tmp = talloc_strdup(mem_ctx, get_global_sam_name());
if (tmp == NULL) {
return NT_STATUS_NO_MEMORY;
}
init_lsa_StringLarge(&info3->base.logon_domain, tmp);
/* Domain sid */
sid_copy(&domain_sid, get_global_sam_sid());
info3->base.domain_sid = dom_sid_dup(mem_ctx, &domain_sid);
if (info3->base.domain_sid == NULL) {
return NT_STATUS_NO_MEMORY;
}
/* Guest rid */
info3->base.rid = DOMAIN_RID_GUEST;
/* Primary gid */
info3->base.primary_gid = DOMAIN_RID_GUESTS;
/* Set as guest */
info3->base.user_flags = NETLOGON_GUEST;
TALLOC_FREE(pwd);
return NT_STATUS_OK;
}
bool lookup_unix_user_name(const char *name, DOM_SID *sid)
{
struct passwd *pwd;
pwd = Get_Pwnam_alloc(talloc_autofree_context(), name);
if (pwd == NULL) {
return False;
}
sid_copy(sid, &global_sid_Unix_Users);
sid_append_rid(sid, (uint32_t)pwd->pw_uid); /* For 64-bit uid's we have enough
* space ... */
TALLOC_FREE(pwd);
return True;
}
char *get_user_home_dir(TALLOC_CTX *mem_ctx, const char *user)
{
struct passwd *pass;
char *result;
/* Ensure the user exists. */
pass = Get_Pwnam_alloc(mem_ctx, user);
if (!pass)
return(NULL);
/* Return home directory from struct passwd. */
result = talloc_move(mem_ctx, &pass->pw_dir);
TALLOC_FREE(pass);
return result;
}
NTSTATUS make_session_info_from_username(TALLOC_CTX *mem_ctx,
const char *username,
bool is_guest,
struct auth_session_info **session_info)
{
struct passwd *pwd;
NTSTATUS status;
struct auth_serversupplied_info *result;
TALLOC_CTX *tmp_ctx;
tmp_ctx = talloc_stackframe();
if (tmp_ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
pwd = Get_Pwnam_alloc(tmp_ctx, username);
if (pwd == NULL) {
status = NT_STATUS_NO_SUCH_USER;
goto done;
}
status = make_server_info_pw(tmp_ctx, pwd->pw_name, pwd, &result);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
result->nss_token = true;
result->guest = is_guest;
/* Now turn the server_info into a session_info with the full token etc */
status = create_local_token(mem_ctx,
result,
NULL,
pwd->pw_name,
session_info);
done:
talloc_free(tmp_ctx);
return status;
}
void add_session_user(const char *user)
{
struct passwd *pw;
char *tmp;
pw = Get_Pwnam_alloc(talloc_tos(), user);
if (pw == NULL) {
return;
}
if (session_userlist == NULL) {
session_userlist = SMB_STRDUP(pw->pw_name);
goto done;
}
if (in_list(pw->pw_name,session_userlist,False) ) {
goto done;
}
if (strlen(session_userlist) > 128 * 1024) {
DEBUG(3,("add_session_user: session userlist already "
"too large.\n"));
goto done;
}
if (asprintf(&tmp, "%s %s", session_userlist, pw->pw_name) == -1) {
DEBUG(3, ("asprintf failed\n"));
goto done;
}
SAFE_FREE(session_userlist);
session_userlist = tmp;
done:
TALLOC_FREE(pw);
}
bool change_to_guest(void)
{
struct passwd *pass;
pass = Get_Pwnam_alloc(talloc_tos(), lp_guestaccount());
if (!pass) {
return false;
}
#ifdef AIX
/* MWW: From AIX FAQ patch to WU-ftpd: call initgroups before
setting IDs */
initgroups(pass->pw_name, pass->pw_gid);
#endif
set_sec_ctx(pass->pw_uid, pass->pw_gid, 0, NULL, NULL);
current_user.conn = NULL;
current_user.vuid = UID_FIELD_INVALID;
TALLOC_FREE(pass);
return true;
}
struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, const char *domuser,
char **p_save_username, bool create )
{
struct passwd *pw = NULL;
char *p = NULL;
char *username = NULL;
/* we only save a copy of the username it has been mangled
by winbindd use default domain */
*p_save_username = NULL;
/* don't call map_username() here since it has to be done higher
up the stack so we don't call it multiple times */
username = talloc_strdup(mem_ctx, domuser);
if (!username) {
return NULL;
}
p = strchr_m( username, *lp_winbind_separator() );
/* code for a DOMAIN\user string */
if ( p ) {
pw = Get_Pwnam_alloc( mem_ctx, domuser );
if ( pw ) {
/* make sure we get the case of the username correct */
/* work around 'winbind use default domain = yes' */
if ( lp_winbind_use_default_domain() &&
!strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
char *domain;
/* split the domain and username into 2 strings */
*p = '\0';
domain = username;
*p_save_username = talloc_asprintf(mem_ctx,
"%s%c%s",
domain,
*lp_winbind_separator(),
pw->pw_name);
if (!*p_save_username) {
TALLOC_FREE(pw);
return NULL;
}
} else {
*p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
}
/* whew -- done! */
return pw;
}
/* setup for lookup of just the username */
/* remember that p and username are overlapping memory */
p++;
username = talloc_strdup(mem_ctx, p);
if (!username) {
return NULL;
}
}
/* just lookup a plain username */
pw = Get_Pwnam_alloc(mem_ctx, username);
/* Create local user if requested but only if winbindd
is not running. We need to protect against cases
where winbindd is failing and then prematurely
creating users in /etc/passwd */
if ( !pw && create && !winbind_ping() ) {
/* Don't add a machine account. */
if (username[strlen(username)-1] == '$')
return NULL;
_smb_create_user(NULL, username, NULL);
pw = Get_Pwnam_alloc(mem_ctx, username);
}
/* one last check for a valid passwd struct */
if (pw) {
*p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
}
return pw;
}
static NTSTATUS idmap_nss_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
{
int i;
/* initialize the status to avoid suprise */
for (i = 0; ids[i]; i++) {
ids[i]->status = ID_UNKNOWN;
}
for (i = 0; ids[i]; i++) {
struct group *gr;
enum lsa_SidType type;
char *name = NULL;
bool ret;
/* by default calls to winbindd are disabled
the following call will not recurse so this is safe */
(void)winbind_on();
ret = winbind_lookup_sid(talloc_tos(), ids[i]->sid, NULL,
(const char **)&name, &type);
(void)winbind_off();
if (!ret) {
/* TODO: how do we know if the name is really not mapped,
* or something just failed ? */
ids[i]->status = ID_UNMAPPED;
continue;
}
switch (type) {
case SID_NAME_USER: {
struct passwd *pw;
/* this will find also all lower case name and use username level */
pw = Get_Pwnam_alloc(talloc_tos(), name);
if (pw) {
ids[i]->xid.id = pw->pw_uid;
ids[i]->xid.type = ID_TYPE_UID;
ids[i]->status = ID_MAPPED;
}
TALLOC_FREE(pw);
break;
}
case SID_NAME_DOM_GRP:
case SID_NAME_ALIAS:
case SID_NAME_WKN_GRP:
gr = getgrnam(name);
if (gr) {
ids[i]->xid.id = gr->gr_gid;
ids[i]->xid.type = ID_TYPE_GID;
ids[i]->status = ID_MAPPED;
}
break;
default:
ids[i]->status = ID_UNKNOWN;
break;
}
TALLOC_FREE(name);
}
return NT_STATUS_OK;
}
bool authorise_login(int snum, fstring user, DATA_BLOB password,
bool *guest)
{
bool ok = False;
#ifdef DEBUG_PASSWORD
DEBUG(100,("authorise_login: checking authorisation on "
"user=%s pass=%s\n", user,password.data));
#endif
*guest = False;
/* there are several possibilities:
1) login as the given user with given password
2) login as a previously registered username with the given
password
3) login as a session list username with the given password
4) login as a previously validated user/password pair
5) login as the "user ="******"user ="******"");
if (!user_list)
return(False);
for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
!ok && auser;
auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
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));
}
}
SAFE_FREE(user_list);
}
/* check the user= fields and the given password */
if (!ok && lp_username(snum)) {
TALLOC_CTX *ctx = talloc_tos();
char *auser;
char *user_list = talloc_strdup(ctx, lp_username(snum));
char *saveptr;
if (!user_list) {
goto check_guest;
}
user_list = talloc_string_sub(ctx,
user_list,
"%S",
lp_servicename(snum));
if (!user_list) {
goto check_guest;
}
for (auser = strtok_r(user_list, LIST_SEP, &saveptr);
auser && !ok;
auser = strtok_r(NULL, LIST_SEP, &saveptr)) {
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 and "
"given password ok (%s)\n",
user));
}
}
}
}
check_guest:
/* check for a normal guest connection */
if (!ok && GUEST_OK(snum)) {
struct passwd *guest_pw;
fstring guestname;
fstrcpy(guestname,lp_guestaccount());
guest_pw = Get_Pwnam_alloc(talloc_tos(), guestname);
if (guest_pw != NULL) {
fstrcpy(user,guestname);
ok = True;
DEBUG(3,("authorise_login: ACCEPTED: guest account "
"and guest ok (%s)\n", user));
} else {
DEBUG(0,("authorise_login: Invalid guest account "
"%s??\n",guestname));
}
TALLOC_FREE(guest_pw);
*guest = True;
}
if (ok && !user_ok(user, snum)) {
DEBUG(0,("authorise_login: rejected invalid user %s\n",user));
ok = False;
}
return(ok);
}
static connection_struct *make_connection_snum(int snum, user_struct *vuser,
DATA_BLOB password,
const char *pdev,
NTSTATUS *status)
{
struct passwd *pass = NULL;
bool guest = False;
connection_struct *conn;
SMB_STRUCT_STAT st;
fstring user;
fstring dev;
int ret;
char addr[INET6_ADDRSTRLEN];
bool on_err_call_dis_hook = false;
*user = 0;
fstrcpy(dev, pdev);
SET_STAT_INVALID(st);
if (NT_STATUS_IS_ERR(*status = share_sanity_checks(snum, dev))) {
return NULL;
}
conn = conn_new();
if (!conn) {
DEBUG(0,("Couldn't find free connection.\n"));
*status = NT_STATUS_INSUFFICIENT_RESOURCES;
return NULL;
}
conn->params->service = snum;
conn->nt_user_token = NULL;
if (lp_guest_only(snum)) {
const char *guestname = lp_guestaccount();
NTSTATUS status2;
char *found_username = NULL;
guest = True;
pass = getpwnam_alloc(talloc_tos(), guestname);
if (!pass) {
DEBUG(0,("make_connection_snum: Invalid guest "
"account %s??\n",guestname));
conn_free(conn);
*status = NT_STATUS_NO_SUCH_USER;
return NULL;
}
status2 = create_token_from_username(conn->mem_ctx, pass->pw_name, True,
&conn->uid, &conn->gid,
&found_username,
&conn->nt_user_token);
if (!NT_STATUS_IS_OK(status2)) {
TALLOC_FREE(pass);
conn_free(conn);
*status = status2;
return NULL;
}
fstrcpy(user, found_username);
string_set(&conn->user,user);
conn->force_user = True;
TALLOC_FREE(found_username);
TALLOC_FREE(pass);
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)\n", lp_servicename(snum)));
conn_free(conn);
*status = NT_STATUS_ACCESS_DENIED;
return NULL;
}
} else {
if (!user_ok_token(vuser->user.unix_name,
vuser->nt_user_token, snum)) {
DEBUG(2, ("user '%s' (from session setup) not "
"permitted to access this share "
"(%s)\n", vuser->user.unix_name,
lp_servicename(snum)));
conn_free(conn);
*status = NT_STATUS_ACCESS_DENIED;
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) {
NTSTATUS status2;
char *found_username = NULL;
/* 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)) {
DEBUG( 2, ( "Invalid username/password for [%s]\n",
lp_servicename(snum)) );
conn_free(conn);
*status = NT_STATUS_WRONG_PASSWORD;
return NULL;
}
pass = Get_Pwnam_alloc(talloc_tos(), user);
status2 = create_token_from_username(conn->mem_ctx, pass->pw_name, True,
&conn->uid, &conn->gid,
&found_username,
&conn->nt_user_token);
TALLOC_FREE(pass);
if (!NT_STATUS_IS_OK(status2)) {
conn_free(conn);
*status = status2;
return NULL;
}
fstrcpy(user, found_username);
string_set(&conn->user,user);
TALLOC_FREE(found_username);
conn->force_user = True;
} else {
DEBUG(0, ("invalid VUID (vuser) but not in security=share\n"));
conn_free(conn);
*status = NT_STATUS_ACCESS_DENIED;
return NULL;
}
add_session_user(user);
safe_strcpy(conn->client_address,
client_addr(get_client_fd(),addr,sizeof(addr)),
sizeof(conn->client_address)-1);
conn->num_files_open = 0;
conn->lastused = conn->lastused_count = time(NULL);
conn->used = True;
conn->printer = (strncmp(dev,"LPT",3) == 0);
conn->ipc = ( (strncmp(dev,"IPC",3) == 0) ||
( lp_enable_asu_support() && strequal(dev,"ADMIN$")) );
conn->dirptr = NULL;
/* Case options for the share. */
if (lp_casesensitive(snum) == Auto) {
/* We will be setting this per packet. Set to be case
* insensitive for now. */
conn->case_sensitive = False;
} else {
conn->case_sensitive = (bool)lp_casesensitive(snum);
}
conn->case_preserve = lp_preservecase(snum);
conn->short_case_preserve = lp_shortpreservecase(snum);
conn->encrypt_level = lp_smb_encrypt(snum);
conn->veto_list = NULL;
conn->hide_list = NULL;
conn->veto_oplock_list = NULL;
conn->aio_write_behind_list = NULL;
string_set(&conn->dirpath,"");
string_set(&conn->user,user);
conn->read_only = lp_readonly(SNUM(conn));
conn->admin_user = False;
/*
* If force user is true, then store the given userid and the gid of
* the user we're forcing.
* For auxiliary groups see below.
*/
if (*lp_force_user(snum)) {
NTSTATUS status2;
status2 = find_forced_user(conn,
(vuser != NULL) && vuser->guest,
user);
if (!NT_STATUS_IS_OK(status2)) {
conn_free(conn);
*status = status2;
return NULL;
}
string_set(&conn->user,user);
conn->force_user = True;
DEBUG(3,("Forced user %s\n",user));
}
/*
* If force group is true, then override
* any groupid stored for the connecting user.
*/
if (*lp_force_group(snum)) {
NTSTATUS status2;
DOM_SID group_sid;
status2 = find_forced_group(conn->force_user,
snum, user,
&group_sid, &conn->gid);
if (!NT_STATUS_IS_OK(status2)) {
conn_free(conn);
*status = status2;
return NULL;
}
if ((conn->nt_user_token == NULL) && (vuser != NULL)) {
/* Not force user and not security=share, but force
* group. vuser has a token to copy */
conn->nt_user_token = dup_nt_token(
NULL, vuser->nt_user_token);
if (conn->nt_user_token == NULL) {
DEBUG(0, ("dup_nt_token failed\n"));
conn_free(conn);
*status = NT_STATUS_NO_MEMORY;
return NULL;
}
}
/* If conn->nt_user_token is still NULL, we have
* security=share. This means ignore the SID, as we had no
* vuser to copy from */
if (conn->nt_user_token != NULL) {
/* Overwrite the primary group sid */
sid_copy(&conn->nt_user_token->user_sids[1],
&group_sid);
}
conn->force_group = True;
}
if (conn->nt_user_token != NULL) {
size_t i;
/* We have a share-specific token from force [user|group].
* This means we have to create the list of unix groups from
* the list of sids. */
conn->ngroups = 0;
conn->groups = NULL;
for (i=0; i<conn->nt_user_token->num_sids; i++) {
gid_t gid;
DOM_SID *sid = &conn->nt_user_token->user_sids[i];
if (!sid_to_gid(sid, &gid)) {
DEBUG(10, ("Could not convert SID %s to gid, "
"ignoring it\n",
sid_string_dbg(sid)));
continue;
}
if (!add_gid_to_array_unique(conn->mem_ctx, gid, &conn->groups,
&conn->ngroups)) {
DEBUG(0, ("add_gid_to_array_unique failed\n"));
conn_free(conn);
*status = NT_STATUS_NO_MEMORY;
return NULL;
}
}
}
{
char *s = talloc_sub_advanced(talloc_tos(),
lp_servicename(SNUM(conn)), conn->user,
conn->connectpath, conn->gid,
get_current_username(),
current_user_info.domain,
lp_pathname(snum));
if (!s) {
conn_free(conn);
*status = NT_STATUS_NO_MEMORY;
return NULL;
}
if (!set_conn_connectpath(conn,s)) {
TALLOC_FREE(s);
conn_free(conn);
*status = NT_STATUS_NO_MEMORY;
return NULL;
}
DEBUG(3,("Connect path is '%s' for service [%s]\n",s,
lp_servicename(snum)));
TALLOC_FREE(s);
}
/*
* New code to check if there's a share security descripter
* added from NT server manager. This is done after the
* smb.conf checks are done as we need a uid and token. JRA.
*
*/
{
bool can_write = False;
NT_USER_TOKEN *token = conn->nt_user_token ?
conn->nt_user_token :
(vuser ? vuser->nt_user_token : NULL);
/*
* I don't believe this can happen. But the
* logic above is convoluted enough to confuse
* automated checkers, so be sure. JRA.
*/
if (token == NULL) {
DEBUG(0,("make_connection: connection to %s "
"denied due to missing "
"NT token.\n",
lp_servicename(snum)));
conn_free(conn);
*status = NT_STATUS_ACCESS_DENIED;
return NULL;
}
can_write = share_access_check(token,
lp_servicename(snum),
FILE_WRITE_DATA);
if (!can_write) {
if (!share_access_check(token,
lp_servicename(snum),
FILE_READ_DATA)) {
/* No access, read or write. */
DEBUG(0,("make_connection: connection to %s "
"denied due to security "
"descriptor.\n",
lp_servicename(snum)));
conn_free(conn);
*status = NT_STATUS_ACCESS_DENIED;
return NULL;
} else {
conn->read_only = True;
}
}
}
/* Initialise VFS function pointers */
if (!smbd_vfs_init(conn)) {
DEBUG(0, ("vfs_init failed for service %s\n",
lp_servicename(snum)));
conn_free(conn);
*status = NT_STATUS_BAD_NETWORK_NAME;
return NULL;
}
/*
* If widelinks are disallowed we need to canonicalise the connect
* path here to ensure we don't have any symlinks in the
* connectpath. We will be checking all paths on this connection are
* below this directory. We must do this after the VFS init as we
* depend on the realpath() pointer in the vfs table. JRA.
*/
if (!lp_widelinks(snum)) {
if (!canonicalize_connect_path(conn)) {
DEBUG(0, ("canonicalize_connect_path failed "
"for service %s, path %s\n",
lp_servicename(snum),
conn->connectpath));
conn_free(conn);
*status = NT_STATUS_BAD_NETWORK_NAME;
return NULL;
}
}
if ((!conn->printer) && (!conn->ipc)) {
conn->notify_ctx = notify_init(conn->mem_ctx, server_id_self(),
smbd_messaging_context(),
smbd_event_context(),
conn);
}
/* ROOT Activities: */
/*
* Enforce the max connections parameter.
*/
if ((lp_max_connections(snum) > 0)
&& (count_current_connections(lp_servicename(SNUM(conn)), True) >=
lp_max_connections(snum))) {
DEBUG(1, ("Max connections (%d) exceeded for %s\n",
lp_max_connections(snum), lp_servicename(snum)));
conn_free(conn);
*status = NT_STATUS_INSUFFICIENT_RESOURCES;
return NULL;
}
/*
* Get us an entry in the connections db
*/
if (!claim_connection(conn, lp_servicename(snum), 0)) {
DEBUG(1, ("Could not store connections entry\n"));
conn_free(conn);
*status = NT_STATUS_INTERNAL_DB_ERROR;
return NULL;
}
/* Preexecs are done here as they might make the dir we are to ChDir
* to below */
/* execute any "root preexec = " line */
if (*lp_rootpreexec(snum)) {
char *cmd = talloc_sub_advanced(talloc_tos(),
lp_servicename(SNUM(conn)), conn->user,
conn->connectpath, conn->gid,
get_current_username(),
current_user_info.domain,
lp_rootpreexec(snum));
DEBUG(5,("cmd=%s\n",cmd));
ret = smbrun(cmd,NULL);
TALLOC_FREE(cmd);
if (ret != 0 && lp_rootpreexec_close(snum)) {
DEBUG(1,("root preexec gave %d - failing "
"connection\n", ret));
yield_connection(conn, lp_servicename(snum));
conn_free(conn);
*status = NT_STATUS_ACCESS_DENIED;
return NULL;
}
}
/* USER Activites: */
if (!change_to_user(conn, conn->vuid)) {
/* No point continuing if they fail the basic checks */
DEBUG(0,("Can't become connected user!\n"));
yield_connection(conn, lp_servicename(snum));
conn_free(conn);
*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)) {
char *cmd = talloc_sub_advanced(talloc_tos(),
lp_servicename(SNUM(conn)), conn->user,
conn->connectpath, conn->gid,
get_current_username(),
current_user_info.domain,
lp_preexec(snum));
ret = smbrun(cmd,NULL);
TALLOC_FREE(cmd);
if (ret != 0 && lp_preexec_close(snum)) {
DEBUG(1,("preexec gave %d - failing connection\n",
ret));
*status = NT_STATUS_ACCESS_DENIED;
goto err_root_exit;
}
}
#ifdef WITH_FAKE_KASERVER
if (lp_afs_share(snum)) {
afs_login(conn);
}
#endif
/* Add veto/hide lists */
if (!IS_IPC(conn) && !IS_PRINT(conn)) {
set_namearray( &conn->veto_list, lp_veto_files(snum));
set_namearray( &conn->hide_list, lp_hide_files(snum));
set_namearray( &conn->veto_oplock_list, lp_veto_oplocks(snum));
set_namearray( &conn->aio_write_behind_list,
lp_aio_write_behind(snum));
}
/* Invoke VFS make connection hook - do this before the VFS_STAT call
to allow any filesystems needing user credentials to initialize
themselves. */
if (SMB_VFS_CONNECT(conn, lp_servicename(snum), user) < 0) {
DEBUG(0,("make_connection: VFS make connection failed!\n"));
*status = NT_STATUS_UNSUCCESSFUL;
goto err_root_exit;
}
/* Any error exit after here needs to call the disconnect hook. */
on_err_call_dis_hook = true;
/* win2000 does not check the permissions on the directory
during the tree connect, instead relying on permission
check during individual operations. To match this behaviour
I have disabled this chdir check (tridge) */
/* the alternative is just to check the directory exists */
if ((ret = SMB_VFS_STAT(conn, conn->connectpath, &st)) != 0 ||
!S_ISDIR(st.st_mode)) {
if (ret == 0 && !S_ISDIR(st.st_mode)) {
DEBUG(0,("'%s' is not a directory, when connecting to "
"[%s]\n", conn->connectpath,
lp_servicename(snum)));
} else {
DEBUG(0,("'%s' does not exist or permission denied "
"when connecting to [%s] Error was %s\n",
conn->connectpath, lp_servicename(snum),
strerror(errno) ));
}
*status = NT_STATUS_BAD_NETWORK_NAME;
goto err_root_exit;
}
string_set(&conn->origpath,conn->connectpath);
#if SOFTLINK_OPTIMISATION
/* resolve any soft links early if possible */
if (vfs_ChDir(conn,conn->connectpath) == 0) {
TALLOC_CTX *ctx = talloc_tos();
char *s = vfs_GetWd(ctx,s);
if (!s) {
*status = map_nt_error_from_unix(errno);
goto err_root_exit;
}
if (!set_conn_connectpath(conn,s)) {
*status = NT_STATUS_NO_MEMORY;
goto err_root_exit;
}
vfs_ChDir(conn,conn->connectpath);
}
#endif
/* Figure out the characteristics of the underlying filesystem. This
* assumes that all the filesystem mounted withing a share path have
* the same characteristics, which is likely but not guaranteed.
*/
conn->fs_capabilities = SMB_VFS_FS_CAPABILITIES(conn);
/*
* Print out the 'connected as' stuff here as we need
* to know the effective uid and gid we will be using
* (at least initially).
*/
if( DEBUGLVL( IS_IPC(conn) ? 3 : 1 ) ) {
dbgtext( "%s (%s) ", get_remote_machine_name(),
conn->client_address );
dbgtext( "%s", srv_is_signing_active() ? "signed " : "");
dbgtext( "connect to service %s ", lp_servicename(snum) );
dbgtext( "initially as user %s ", user );
dbgtext( "(uid=%d, gid=%d) ", (int)geteuid(), (int)getegid() );
dbgtext( "(pid %d)\n", (int)sys_getpid() );
}
/* we've finished with the user stuff - go back to root */
change_to_root_user();
return(conn);
err_root_exit:
change_to_root_user();
if (on_err_call_dis_hook) {
/* Call VFS disconnect hook */
SMB_VFS_DISCONNECT(conn);
}
yield_connection(conn, lp_servicename(snum));
conn_free(conn);
return NULL;
}
const DOM_SID *pdb_get_group_sid(struct samu *sampass)
{
DOM_SID *gsid;
struct passwd *pwd;
/* Return the cached group SID if we have that */
if ( sampass->group_sid ) {
return sampass->group_sid;
}
/* generate the group SID from the user's primary Unix group */
if ( !(gsid = TALLOC_P( sampass, DOM_SID )) ) {
return NULL;
}
/* No algorithmic mapping, meaning that we have to figure out the
primary group SID according to group mapping and the user SID must
be a newly allocated one. We rely on the user's Unix primary gid.
We have no choice but to fail if we can't find it. */
if ( sampass->unix_pw ) {
pwd = sampass->unix_pw;
} else {
pwd = Get_Pwnam_alloc( sampass, pdb_get_username(sampass) );
}
if ( !pwd ) {
DEBUG(0,("pdb_get_group_sid: Failed to find Unix account for %s\n", pdb_get_username(sampass) ));
return NULL;
}
if ( pdb_gid_to_sid(pwd->pw_gid, gsid) ) {
enum lsa_SidType type = SID_NAME_UNKNOWN;
TALLOC_CTX *mem_ctx = talloc_init("pdb_get_group_sid");
bool lookup_ret;
if (!mem_ctx) {
return NULL;
}
/* Now check that it's actually a domain group and not something else */
lookup_ret = lookup_sid(mem_ctx, gsid, NULL, NULL, &type);
TALLOC_FREE( mem_ctx );
if ( lookup_ret && (type == SID_NAME_DOM_GRP) ) {
sampass->group_sid = gsid;
return sampass->group_sid;
}
DEBUG(3, ("Primary group for user %s is a %s and not a domain group\n",
pwd->pw_name, sid_type_lookup(type)));
}
/* Just set it to the 'Domain Users' RID of 512 which will
always resolve to a name */
sid_compose(gsid, get_global_sam_sid(), DOMAIN_GROUP_RID_USERS);
sampass->group_sid = gsid;
return sampass->group_sid;
}
