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/*
Unix SMB/CIFS implementation.
Winbind daemon - user related functions
Copyright (C) Tim Potter 2000
Copyright (C) Jeremy Allison 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 "winbindd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND
extern userdom_struct current_user_info;
/* Fill a pwent structure with information we have obtained */
static BOOL winbindd_fill_pwent(char *dom_name, char *user_name,
DOM_SID *user_sid, DOM_SID *group_sid,
char *full_name, struct winbindd_pw *pw)
{
fstring output_username;
pstring homedir;
fstring sid_string;
if (!pw || !dom_name || !user_name)
return False;
/* Resolve the uid number */
if (!NT_STATUS_IS_OK(sid_to_uid(user_sid, &(pw->pw_uid)))) {
DEBUG(1, ("error getting user id for sid %s\n", sid_to_string(sid_string, user_sid)));
return False;
}
/* Resolve the gid number */
if (!NT_STATUS_IS_OK(sid_to_gid(group_sid, &(pw->pw_gid)))) {
DEBUG(1, ("error getting group id for sid %s\n", sid_to_string(sid_string, group_sid)));
return False;
}
/* Username */
fill_domain_username(output_username, dom_name, user_name);
safe_strcpy(pw->pw_name, output_username, sizeof(pw->pw_name) - 1);
/* Full name (gecos) */
safe_strcpy(pw->pw_gecos, full_name, sizeof(pw->pw_gecos) - 1);
/* Home directory and shell - use template config parameters. The
defaults are /tmp for the home directory and /bin/false for
shell. */
/* The substitution of %U and %D in the 'template homedir' is done
by lp_string() calling standard_sub_basic(). */
fstrcpy(current_user_info.smb_name, user_name);
sub_set_smb_name(user_name);
fstrcpy(current_user_info.domain, dom_name);
pstrcpy(homedir, lp_template_homedir());
safe_strcpy(pw->pw_dir, homedir, sizeof(pw->pw_dir) - 1);
safe_strcpy(pw->pw_shell, lp_template_shell(),
sizeof(pw->pw_shell) - 1);
/* Password - set to "x" as we can't generate anything useful here.
Authentication can be done using the pam_winbind module. */
safe_strcpy(pw->pw_passwd, "x", sizeof(pw->pw_passwd) - 1);
return True;
}
/* Return a password structure from a username. */
enum winbindd_result winbindd_getpwnam(struct winbindd_cli_state *state)
{
WINBIND_USERINFO user_info;
DOM_SID user_sid;
NTSTATUS status;
fstring name_domain, name_user;
enum SID_NAME_USE name_type;
struct winbindd_domain *domain;
TALLOC_CTX *mem_ctx;
/* Ensure null termination */
state->request.data.username[sizeof(state->request.data.username)-1]='\0';
DEBUG(3, ("[%5d]: getpwnam %s\n", state->pid,
state->request.data.username));
/* Parse domain and username */
if (!parse_domain_user(state->request.data.username, name_domain,
name_user))
return WINBINDD_ERROR;
/* don't handle our own domain if we are a DC. This code handles cases where
the account doesn't exist anywhere and gets passed on down the NSS layer */
if ( ((lp_server_role() == ROLE_DOMAIN_PDC) || (lp_server_role()==ROLE_DOMAIN_BDC)) &&
strequal(name_domain, lp_workgroup()) )
{
DEBUG(7,("winbindd_getpwnam: rejecting getpwnam() for %s\\%s since I am on the PDC for this domain\n",
name_domain, name_user));
return WINBINDD_ERROR;
}
if ((domain = find_domain_from_name(name_domain)) == NULL) {
DEBUG(5, ("no such domain: %s\n", name_domain));
return WINBINDD_ERROR;
}
/* Get rid and name type from name */
if (!winbindd_lookup_sid_by_name(domain, name_user, &user_sid, &name_type)) {
DEBUG(1, ("user '%s' does not exist\n", name_user));
return WINBINDD_ERROR;
}
if (name_type != SID_NAME_USER) {
DEBUG(1, ("name '%s' is not a user name: %d\n", name_user,
name_type));
return WINBINDD_ERROR;
}
/* Get some user info. Split the user rid from the sid obtained
from the winbind_lookup_by_name() call and use it in a
winbind_lookup_userinfo() */
if (!(mem_ctx = talloc_init("winbindd_getpwnam([%s]\\[%s])",
name_domain, name_user))) {
DEBUG(1, ("out of memory\n"));
return WINBINDD_ERROR;
}
status = domain->methods->query_user(domain, mem_ctx, &user_sid,
&user_info);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("error getting user info for user '[%s]\\[%s]'\n",
name_domain, name_user));
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
/* Now take all this information and fill in a passwd structure */
if (!winbindd_fill_pwent(name_domain, name_user,
user_info.user_sid, user_info.group_sid,
user_info.full_name,
&state->response.data.pw)) {
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
talloc_destroy(mem_ctx);
return WINBINDD_OK;
}
/* Return a password structure given a uid number */
enum winbindd_result winbindd_getpwuid(struct winbindd_cli_state *state)
{
DOM_SID user_sid;
struct winbindd_domain *domain;
fstring dom_name;
fstring user_name;
enum SID_NAME_USE name_type;
WINBIND_USERINFO user_info;
TALLOC_CTX *mem_ctx;
NTSTATUS status;
gid_t gid;
/* Bug out if the uid isn't in the winbind range */
if ((state->request.data.uid < server_state.uid_low ) ||
(state->request.data.uid > server_state.uid_high))
return WINBINDD_ERROR;
DEBUG(3, ("[%5d]: getpwuid %d\n", state->pid,
state->request.data.uid));
/* Get rid from uid */
if (!NT_STATUS_IS_OK(uid_to_sid(&user_sid, state->request.data.uid))) {
DEBUG(1, ("could not convert uid %d to SID\n",
state->request.data.uid));
return WINBINDD_ERROR;
}
/* Get name and name type from rid */
if (!winbindd_lookup_name_by_sid(&user_sid, dom_name, user_name, &name_type)) {
fstring temp;
sid_to_string(temp, &user_sid);
DEBUG(1, ("could not lookup sid %s\n", temp));
return WINBINDD_ERROR;
}
domain = find_domain_from_sid(&user_sid);
if (!domain) {
DEBUG(1,("Can't find domain from sid\n"));
return WINBINDD_ERROR;
}
/* Get some user info */
if (!(mem_ctx = talloc_init("winbind_getpwuid(%d)",
state->request.data.uid))) {
DEBUG(1, ("out of memory\n"));
return WINBINDD_ERROR;
}
status = domain->methods->query_user(domain, mem_ctx, &user_sid,
&user_info);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("error getting user info for user '%s'\n",
user_name));
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
/* Check group has a gid number */
if (!NT_STATUS_IS_OK(sid_to_gid(user_info.group_sid, &gid))) {
DEBUG(1, ("error getting group id for user %s\n", user_name));
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
/* Fill in password structure */
if (!winbindd_fill_pwent(domain->name, user_name, user_info.user_sid,
user_info.group_sid,
user_info.full_name, &state->response.data.pw)) {
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
talloc_destroy(mem_ctx);
return WINBINDD_OK;
}
/*
* set/get/endpwent functions
*/
/* Rewind file pointer for ntdom passwd database */
enum winbindd_result winbindd_setpwent(struct winbindd_cli_state *state)
{
struct winbindd_domain *domain;
DEBUG(3, ("[%5d]: setpwent\n", state->pid));
/* Check user has enabled this */
if (!lp_winbind_enum_users())
return WINBINDD_ERROR;
/* Free old static data if it exists */
if (state->getpwent_state != NULL) {
free_getent_state(state->getpwent_state);
state->getpwent_state = NULL;
}
/* Create sam pipes for each domain we know about */
for(domain = domain_list(); domain != NULL; domain = domain->next) {
struct getent_state *domain_state;
/* Create a state record for this domain */
if ((domain_state = (struct getent_state *)
malloc(sizeof(struct getent_state))) == NULL)
return WINBINDD_ERROR;
ZERO_STRUCTP(domain_state);
fstrcpy(domain_state->domain_name, domain->name);
/* Add to list of open domains */
DLIST_ADD(state->getpwent_state, domain_state);
}
return WINBINDD_OK;
}
/* Close file pointer to ntdom passwd database */
enum winbindd_result winbindd_endpwent(struct winbindd_cli_state *state)
{
DEBUG(3, ("[%5d]: endpwent\n", state->pid));
free_getent_state(state->getpwent_state);
state->getpwent_state = NULL;
return WINBINDD_OK;
}
/* Get partial list of domain users for a domain. We fill in the sam_entries,
and num_sam_entries fields with domain user information. The dispinfo_ndx
field is incremented to the index of the next user to fetch. Return True if
some users were returned, False otherwise. */
#define MAX_FETCH_SAM_ENTRIES 100
static BOOL get_sam_user_entries(struct getent_state *ent)
{
NTSTATUS status;
uint32 num_entries;
WINBIND_USERINFO *info;
struct getpwent_user *name_list = NULL;
BOOL result = False;
TALLOC_CTX *mem_ctx;
struct winbindd_domain *domain;
struct winbindd_methods *methods;
unsigned int i;
if (ent->num_sam_entries)
return False;
if (!(mem_ctx = talloc_init("get_sam_user_entries(%s)",
ent->domain_name)))
return False;
if (!(domain = find_domain_from_name(ent->domain_name))) {
DEBUG(3, ("no such domain %s in get_sam_user_entries\n",
ent->domain_name));
return False;
}
methods = domain->methods;
/* Free any existing user info */
SAFE_FREE(ent->sam_entries);
ent->num_sam_entries = 0;
/* Call query_user_list to get a list of usernames and user rids */
num_entries = 0;
status = methods->query_user_list(domain, mem_ctx, &num_entries,
&info);
if (num_entries) {
struct getpwent_user *tnl;
tnl = (struct getpwent_user *)Realloc(name_list,
sizeof(struct getpwent_user) *
(ent->num_sam_entries +
num_entries));
if (!tnl) {
DEBUG(0,("get_sam_user_entries realloc failed.\n"));
SAFE_FREE(name_list);
goto done;
} else
name_list = tnl;
}
for (i = 0; i < num_entries; i++) {
/* Store account name and gecos */
if (!info[i].acct_name) {
fstrcpy(name_list[ent->num_sam_entries + i].name, "");
} else {
fstrcpy(name_list[ent->num_sam_entries + i].name,
info[i].acct_name);
}
if (!info[i].full_name) {
fstrcpy(name_list[ent->num_sam_entries + i].gecos, "");
} else {
fstrcpy(name_list[ent->num_sam_entries + i].gecos,
info[i].full_name);
}
/* User and group ids */
sid_copy(&name_list[ent->num_sam_entries+i].user_sid, info[i].user_sid);
sid_copy(&name_list[ent->num_sam_entries+i].group_sid, info[i].group_sid);
}
ent->num_sam_entries += num_entries;
/* Fill in remaining fields */
ent->sam_entries = name_list;
ent->sam_entry_index = 0;
result = ent->num_sam_entries > 0;
done:
talloc_destroy(mem_ctx);
return result;
}
/* Fetch next passwd entry from ntdom database */
#define MAX_GETPWENT_USERS 500
enum winbindd_result winbindd_getpwent(struct winbindd_cli_state *state)
{
struct getent_state *ent;
struct winbindd_pw *user_list;
int num_users, user_list_ndx = 0, i;
DEBUG(3, ("[%5d]: getpwent\n", state->pid));
/* Check user has enabled this */
if (!lp_winbind_enum_users())
return WINBINDD_ERROR;
/* Allocate space for returning a chunk of users */
num_users = MIN(MAX_GETPWENT_USERS, state->request.data.num_entries);
if ((state->response.extra_data =
malloc(num_users * sizeof(struct winbindd_pw))) == NULL)
return WINBINDD_ERROR;
memset(state->response.extra_data, 0, num_users *
sizeof(struct winbindd_pw));
user_list = (struct winbindd_pw *)state->response.extra_data;
if (!(ent = state->getpwent_state))
return WINBINDD_ERROR;
/* Start sending back users */
for (i = 0; i < num_users; i++) {
struct getpwent_user *name_list = NULL;
uint32 result;
/* Do we need to fetch another chunk of users? */
if (ent->num_sam_entries == ent->sam_entry_index) {
while(ent && !get_sam_user_entries(ent)) {
struct getent_state *next_ent;
/* Free state information for this domain */
SAFE_FREE(ent->sam_entries);
next_ent = ent->next;
DLIST_REMOVE(state->getpwent_state, ent);
SAFE_FREE(ent);
ent = next_ent;
}
/* No more domains */
if (!ent)
break;
}
name_list = ent->sam_entries;
/* Skip machine accounts */
if (name_list[ent->sam_entry_index].
name[strlen(name_list[ent->sam_entry_index].name) - 1]
== '$') {
ent->sam_entry_index++;
continue;
}
/* Lookup user info */
result = winbindd_fill_pwent(
ent->domain_name,
name_list[ent->sam_entry_index].name,
&name_list[ent->sam_entry_index].user_sid,
&name_list[ent->sam_entry_index].group_sid,
name_list[ent->sam_entry_index].gecos,
&user_list[user_list_ndx]);
ent->sam_entry_index++;
/* Add user to return list */
if (result) {
user_list_ndx++;
state->response.data.num_entries++;
state->response.length +=
sizeof(struct winbindd_pw);
} else
DEBUG(1, ("could not lookup domain user %s\n",
name_list[ent->sam_entry_index].name));
}
/* Out of domains */
return (user_list_ndx > 0) ? WINBINDD_OK : WINBINDD_ERROR;
}
/* List domain users without mapping to unix ids */
enum winbindd_result winbindd_list_users(struct winbindd_cli_state *state)
{
struct winbindd_domain *domain;
WINBIND_USERINFO *info;
uint32 num_entries = 0, total_entries = 0;
char *ted, *extra_data = NULL;
int extra_data_len = 0;
TALLOC_CTX *mem_ctx;
enum winbindd_result rv = WINBINDD_ERROR;
DEBUG(3, ("[%5d]: list users\n", state->pid));
if (!(mem_ctx = talloc_init("winbindd_list_users")))
return WINBINDD_ERROR;
/* Enumerate over trusted domains */
for (domain = domain_list(); domain; domain = domain->next) {
NTSTATUS status;
struct winbindd_methods *methods;
unsigned int i;
methods = domain->methods;
/* Query display info */
status = methods->query_user_list(domain, mem_ctx,
&num_entries, &info);
if (num_entries == 0)
continue;
/* Allocate some memory for extra data */
total_entries += num_entries;
ted = Realloc(extra_data, sizeof(fstring) * total_entries);
if (!ted) {
DEBUG(0,("failed to enlarge buffer!\n"));
SAFE_FREE(extra_data);
goto done;
} else
extra_data = ted;
/* Pack user list into extra data fields */
for (i = 0; i < num_entries; i++) {
fstring acct_name, name;
if (!info[i].acct_name) {
fstrcpy(acct_name, "");
} else {
fstrcpy(acct_name, info[i].acct_name);
}
fill_domain_username(name, domain->name, acct_name);
/* Append to extra data */
memcpy(&extra_data[extra_data_len], name,
strlen(name));
extra_data_len += strlen(name);
extra_data[extra_data_len++] = ',';
}
}
/* Assign extra_data fields in response structure */
if (extra_data) {
extra_data[extra_data_len - 1] = '\0';
state->response.extra_data = extra_data;
state->response.length += extra_data_len;
}
/* No domains responded but that's still OK so don't return an
error. */
rv = WINBINDD_OK;
done:
talloc_destroy(mem_ctx);
return rv;
}
|