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|
/*
Unix SMB/CIFS implementation.
Authentication utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Andrew Bartlett 2001
Copyright (C) Jeremy Allison 2000-2001
Copyright (C) Rafal Szczesniak 2002
Copyright (C) Volker Lendecke 2006
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 "includes.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
const DOM_SID *user_sid,
const DOM_SID *group_sid,
BOOL is_guest,
int num_groupsids,
const DOM_SID *groupsids);
/****************************************************************************
Create a UNIX user on demand.
****************************************************************************/
static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
{
pstring add_script;
int ret;
pstrcpy(add_script, lp_adduser_script());
if (! *add_script)
return -1;
all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
if (domain)
all_string_sub(add_script, "%D", domain, sizeof(pstring));
if (homedir)
all_string_sub(add_script, "%H", homedir, sizeof(pstring));
ret = smbrun(add_script,NULL);
flush_pwnam_cache();
DEBUG(ret ? 0 : 3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
return ret;
}
/****************************************************************************
Create an auth_usersupplied_data structure
****************************************************************************/
static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
const char *smb_name,
const char *internal_username,
const char *client_domain,
const char *domain,
const char *wksta_name,
DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
DATA_BLOB *plaintext,
BOOL encrypted)
{
DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
*user_info = SMB_MALLOC_P(auth_usersupplied_info);
if (*user_info == NULL) {
DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCTP(*user_info);
DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
(*user_info)->smb_name = SMB_STRDUP(smb_name);
if ((*user_info)->smb_name == NULL) {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
(*user_info)->internal_username = SMB_STRDUP(internal_username);
if ((*user_info)->internal_username == NULL) {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
(*user_info)->domain = SMB_STRDUP(domain);
if ((*user_info)->domain == NULL) {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
(*user_info)->client_domain = SMB_STRDUP(client_domain);
if ((*user_info)->client_domain == NULL) {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
(*user_info)->wksta_name = SMB_STRDUP(wksta_name);
if ((*user_info)->wksta_name == NULL) {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
if (lm_pwd)
(*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length);
if (nt_pwd)
(*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length);
if (lm_interactive_pwd)
(*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length);
if (nt_interactive_pwd)
(*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length);
if (plaintext)
(*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length);
(*user_info)->encrypted = encrypted;
(*user_info)->logon_parameters = 0;
DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
return NT_STATUS_OK;
}
/****************************************************************************
Create an auth_usersupplied_data structure after appropriate mapping.
****************************************************************************/
NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
const char *smb_name,
const char *client_domain,
const char *wksta_name,
DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
DATA_BLOB *plaintext,
BOOL encrypted)
{
const char *domain;
fstring internal_username;
fstrcpy(internal_username, smb_name);
map_username(internal_username);
DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
client_domain, smb_name, wksta_name));
/* don't allow "" as a domain, fixes a Win9X bug
where it doens't supply a domain for logon script
'net use' commands. */
if ( *client_domain )
domain = client_domain;
else
domain = lp_workgroup();
/* do what win2k does. Always map unknown domains to our own
and let the "passdb backend" handle unknown users. */
if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
domain = my_sam_name();
/* we know that it is a trusted domain (and we are allowing them) or it is our domain */
return make_user_info(user_info, smb_name, internal_username,
client_domain, domain, wksta_name,
lm_pwd, nt_pwd,
lm_interactive_pwd, nt_interactive_pwd,
plaintext, encrypted);
}
/****************************************************************************
Create an auth_usersupplied_data, making the DATA_BLOBs here.
Decrypt and encrypt the passwords.
****************************************************************************/
BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
const char *smb_name,
const char *client_domain,
const char *wksta_name,
uint32 logon_parameters,
const uchar *lm_network_pwd,
int lm_pwd_len,
const uchar *nt_network_pwd,
int nt_pwd_len)
{
BOOL ret;
NTSTATUS status;
DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
status = make_user_info_map(user_info,
smb_name, client_domain,
wksta_name,
lm_pwd_len ? &lm_blob : NULL,
nt_pwd_len ? &nt_blob : NULL,
NULL, NULL, NULL,
True);
if (NT_STATUS_IS_OK(status)) {
(*user_info)->logon_parameters = logon_parameters;
}
ret = NT_STATUS_IS_OK(status) ? True : False;
data_blob_free(&lm_blob);
data_blob_free(&nt_blob);
return ret;
}
/****************************************************************************
Create an auth_usersupplied_data, making the DATA_BLOBs here.
Decrypt and encrypt the passwords.
****************************************************************************/
BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
const char *smb_name,
const char *client_domain,
const char *wksta_name,
uint32 logon_parameters,
const uchar chal[8],
const uchar lm_interactive_pwd[16],
const uchar nt_interactive_pwd[16],
const uchar *dc_sess_key)
{
char lm_pwd[16];
char nt_pwd[16];
unsigned char local_lm_response[24];
unsigned char local_nt_response[24];
unsigned char key[16];
ZERO_STRUCT(key);
memcpy(key, dc_sess_key, 8);
if (lm_interactive_pwd)
memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
if (nt_interactive_pwd)
memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
#ifdef DEBUG_PASSWORD
DEBUG(100,("key:"));
dump_data(100, (char *)key, sizeof(key));
DEBUG(100,("lm owf password:"));
dump_data(100, lm_pwd, sizeof(lm_pwd));
DEBUG(100,("nt owf password:"));
dump_data(100, nt_pwd, sizeof(nt_pwd));
#endif
if (lm_interactive_pwd)
SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
if (nt_interactive_pwd)
SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
#ifdef DEBUG_PASSWORD
DEBUG(100,("decrypt of lm owf password:"));
dump_data(100, lm_pwd, sizeof(lm_pwd));
DEBUG(100,("decrypt of nt owf password:"));
dump_data(100, nt_pwd, sizeof(nt_pwd));
#endif
if (lm_interactive_pwd)
SMBOWFencrypt((const unsigned char *)lm_pwd, chal,
local_lm_response);
if (nt_interactive_pwd)
SMBOWFencrypt((const unsigned char *)nt_pwd, chal,
local_nt_response);
/* Password info paranoia */
ZERO_STRUCT(key);
{
BOOL ret;
NTSTATUS nt_status;
DATA_BLOB local_lm_blob;
DATA_BLOB local_nt_blob;
DATA_BLOB lm_interactive_blob;
DATA_BLOB nt_interactive_blob;
if (lm_interactive_pwd) {
local_lm_blob = data_blob(local_lm_response,
sizeof(local_lm_response));
lm_interactive_blob = data_blob(lm_pwd,
sizeof(lm_pwd));
ZERO_STRUCT(lm_pwd);
}
if (nt_interactive_pwd) {
local_nt_blob = data_blob(local_nt_response,
sizeof(local_nt_response));
nt_interactive_blob = data_blob(nt_pwd,
sizeof(nt_pwd));
ZERO_STRUCT(nt_pwd);
}
nt_status = make_user_info_map(
user_info,
smb_name, client_domain, wksta_name,
lm_interactive_pwd ? &local_lm_blob : NULL,
nt_interactive_pwd ? &local_nt_blob : NULL,
lm_interactive_pwd ? &lm_interactive_blob : NULL,
nt_interactive_pwd ? &nt_interactive_blob : NULL,
NULL, True);
if (NT_STATUS_IS_OK(nt_status)) {
(*user_info)->logon_parameters = logon_parameters;
}
ret = NT_STATUS_IS_OK(nt_status) ? True : False;
data_blob_free(&local_lm_blob);
data_blob_free(&local_nt_blob);
data_blob_free(&lm_interactive_blob);
data_blob_free(&nt_interactive_blob);
return ret;
}
}
/****************************************************************************
Create an auth_usersupplied_data structure
****************************************************************************/
BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
const char *smb_name,
const char *client_domain,
const uint8 chal[8],
DATA_BLOB plaintext_password)
{
DATA_BLOB local_lm_blob;
DATA_BLOB local_nt_blob;
NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
/*
* Not encrypted - do so.
*/
DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted "
"format.\n"));
if (plaintext_password.data) {
unsigned char local_lm_response[24];
#ifdef DEBUG_PASSWORD
DEBUG(10,("Unencrypted password (len %d):\n",
(int)plaintext_password.length));
dump_data(100, (const char *)plaintext_password.data,
plaintext_password.length);
#endif
SMBencrypt( (const char *)plaintext_password.data,
(const uchar*)chal, local_lm_response);
local_lm_blob = data_blob(local_lm_response, 24);
/* We can't do an NT hash here, as the password needs to be
case insensitive */
local_nt_blob = data_blob(NULL, 0);
} else {
local_lm_blob = data_blob(NULL, 0);
local_nt_blob = data_blob(NULL, 0);
}
ret = make_user_info_map(
user_info, smb_name, client_domain,
get_remote_machine_name(),
local_lm_blob.data ? &local_lm_blob : NULL,
local_nt_blob.data ? &local_nt_blob : NULL,
NULL, NULL,
plaintext_password.data ? &plaintext_password : NULL,
False);
data_blob_free(&local_lm_blob);
return NT_STATUS_IS_OK(ret) ? True : False;
}
/****************************************************************************
Create an auth_usersupplied_data structure
****************************************************************************/
NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
const char *smb_name,
const char *client_domain,
DATA_BLOB lm_resp, DATA_BLOB nt_resp)
{
return make_user_info_map(user_info, smb_name,
client_domain,
get_remote_machine_name(),
lm_resp.data ? &lm_resp : NULL,
nt_resp.data ? &nt_resp : NULL,
NULL, NULL, NULL,
True);
}
/****************************************************************************
Create a guest user_info blob, for anonymous authenticaion.
****************************************************************************/
BOOL make_user_info_guest(auth_usersupplied_info **user_info)
{
NTSTATUS nt_status;
nt_status = make_user_info(user_info,
"","",
"","",
"",
NULL, NULL,
NULL, NULL,
NULL,
True);
return NT_STATUS_IS_OK(nt_status) ? True : False;
}
/****************************************************************************
prints a NT_USER_TOKEN to debug output.
****************************************************************************/
void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
{
size_t i;
if (!token) {
DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
return;
}
DEBUGC(dbg_class, dbg_lev,
("NT user token of user %s\n",
sid_string_static(&token->user_sids[0]) ));
DEBUGADDC(dbg_class, dbg_lev,
("contains %lu SIDs\n", (unsigned long)token->num_sids));
for (i = 0; i < token->num_sids; i++)
DEBUGADDC(dbg_class, dbg_lev,
("SID[%3lu]: %s\n", (unsigned long)i,
sid_string_static(&token->user_sids[i])));
dump_se_priv( dbg_class, dbg_lev, &token->privileges );
}
/****************************************************************************
prints a UNIX 'token' to debug output.
****************************************************************************/
void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid,
int n_groups, gid_t *groups)
{
int i;
DEBUGC(dbg_class, dbg_lev,
("UNIX token of user %ld\n", (long int)uid));
DEBUGADDC(dbg_class, dbg_lev,
("Primary group is %ld and contains %i supplementary "
"groups\n", (long int)gid, n_groups));
for (i = 0; i < n_groups; i++)
DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
(long int)groups[i]));
}
/******************************************************************************
Create a token for the root user to be used internally by smbd.
This is similar to running under the context of the LOCAL_SYSTEM account
in Windows. This is a read-only token. Do not modify it or free() it.
Create a copy if your need to change it.
******************************************************************************/
NT_USER_TOKEN *get_root_nt_token( void )
{
static NT_USER_TOKEN *token = NULL;
DOM_SID u_sid, g_sid;
struct passwd *pw;
if ( token )
return token;
if ( !(pw = sys_getpwnam( "root" )) ) {
DEBUG(0,("get_root_nt_token: getpwnam\"root\") failed!\n"));
return NULL;
}
/* get the user and primary group SIDs; although the
BUILTIN\Administrators SId is really the one that matters here */
uid_to_sid(&u_sid, pw->pw_uid);
gid_to_sid(&g_sid, pw->pw_gid);
token = create_local_nt_token(NULL, &u_sid, &g_sid, False,
1, &global_sid_Builtin_Administrators);
return token;
}
static int server_info_dtor(void *p)
{
auth_serversupplied_info *server_info =
talloc_get_type_abort(p, auth_serversupplied_info);
if (server_info->sam_account != NULL) {
TALLOC_FREE(server_info->sam_account);
}
ZERO_STRUCTP(server_info);
return 0;
}
/***************************************************************************
Make a server_info struct. Free with TALLOC_FREE().
***************************************************************************/
static auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
{
struct auth_serversupplied_info *result;
result = TALLOC_ZERO_P(mem_ctx, auth_serversupplied_info);
if (result == NULL) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
talloc_set_destructor(result, server_info_dtor);
/* Initialise the uid and gid values to something non-zero
which may save us from giving away root access if there
is a bug in allocating these fields. */
result->uid = -1;
result->gid = -1;
return result;
}
/***************************************************************************
Make (and fill) a user_info struct from a struct samu
***************************************************************************/
NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
struct samu *sampass)
{
NTSTATUS status;
struct passwd *pwd;
gid_t *gids;
auth_serversupplied_info *result;
if ( !(pwd = getpwnam_alloc(NULL, pdb_get_username(sampass))) ) {
DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
pdb_get_username(sampass)));
return NT_STATUS_NO_SUCH_USER;
}
if ( !(result = make_server_info(NULL)) ) {
TALLOC_FREE(pwd);
return NT_STATUS_NO_MEMORY;
}
result->sam_account = sampass;
result->unix_name = talloc_strdup(result, pwd->pw_name);
result->gid = pwd->pw_gid;
result->uid = pwd->pw_uid;
TALLOC_FREE(pwd);
status = pdb_enum_group_memberships(result, sampass,
&result->sids, &gids,
&result->num_sids);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
nt_errstr(status)));
result->sam_account = NULL; /* Don't free on error exit. */
TALLOC_FREE(result);
return status;
}
/* For now we throw away the gids and convert via sid_to_gid
* later. This needs fixing, but I'd like to get the code straight and
* simple first. */
TALLOC_FREE(gids);
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;
}
/*
* Add alias SIDs from memberships within the partially created token SID list
*/
static NTSTATUS add_aliases(TALLOC_CTX *tmp_ctx, const DOM_SID *domain_sid,
struct nt_user_token *token)
{
uint32 *aliases;
size_t i, num_aliases;
NTSTATUS status;
aliases = NULL;
num_aliases = 0;
status = pdb_enum_alias_memberships(tmp_ctx, domain_sid,
token->user_sids,
token->num_sids,
&aliases, &num_aliases);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("pdb_enum_alias_memberships failed: %s\n",
nt_errstr(status)));
return status;
}
for (i=0; i<num_aliases; i++) {
DOM_SID alias_sid;
sid_compose(&alias_sid, domain_sid, aliases[i]);
add_sid_to_array_unique(token, &alias_sid,
&token->user_sids,
&token->num_sids);
if (token->user_sids == NULL) {
DEBUG(0, ("add_sid_to_array failed\n"));
return NT_STATUS_NO_MEMORY;
}
}
return NT_STATUS_OK;
}
static NTSTATUS log_nt_token(TALLOC_CTX *tmp_ctx, NT_USER_TOKEN *token)
{
char *command;
char *group_sidstr;
size_t i;
if ((lp_log_nt_token_command() == NULL) ||
(strlen(lp_log_nt_token_command()) == 0)) {
return NT_STATUS_OK;
}
group_sidstr = talloc_strdup(tmp_ctx, "");
for (i=1; i<token->num_sids; i++) {
group_sidstr = talloc_asprintf(
tmp_ctx, "%s %s", group_sidstr,
sid_string_static(&token->user_sids[i]));
}
command = talloc_string_sub(
tmp_ctx, lp_log_nt_token_command(),
"%s", sid_string_static(&token->user_sids[0]));
command = talloc_string_sub(tmp_ctx, command, "%t", group_sidstr);
if (command == NULL) {
return NT_STATUS_NO_MEMORY;
}
DEBUG(8, ("running command: [%s]\n", command));
if (smbrun(command, NULL) != 0) {
DEBUG(0, ("Could not log NT token\n"));
return NT_STATUS_ACCESS_DENIED;
}
return NT_STATUS_OK;
}
/*******************************************************************
*******************************************************************/
static NTSTATUS add_builtin_administrators( TALLOC_CTX *ctx, struct nt_user_token *token )
{
return NT_STATUS_OK;
}
/*******************************************************************
*******************************************************************/
static NTSTATUS create_builtin_users( void )
{
NTSTATUS status;
DOM_SID dom_users;
status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_USERS );
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(0,("create_builtin_users: Failed to create Users\n"));
return status;
}
/* add domain users */
if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
&& secrets_fetch_domain_sid(lp_workgroup(), &dom_users))
{
sid_append_rid(&dom_users, DOMAIN_GROUP_RID_USERS );
status = pdb_add_aliasmem( &global_sid_Builtin_Users, &dom_users);
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(0,("create_builtin_administrators: Failed to add Domain Users to"
" Users\n"));
return status;
}
}
return NT_STATUS_OK;
}
/*******************************************************************
*******************************************************************/
static NTSTATUS create_builtin_administrators( void )
{
NTSTATUS status;
DOM_SID dom_admins, root_sid;
fstring root_name;
enum SID_NAME_USE type;
TALLOC_CTX *ctx;
BOOL ret;
status = pdb_create_builtin_alias( BUILTIN_ALIAS_RID_ADMINS );
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(0,("create_builtin_administrators: Failed to create Administrators\n"));
return status;
}
/* add domain admins */
if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
&& secrets_fetch_domain_sid(lp_workgroup(), &dom_admins))
{
sid_append_rid(&dom_admins, DOMAIN_GROUP_RID_ADMINS);
status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &dom_admins );
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(0,("create_builtin_administrators: Failed to add Domain Admins"
" Administrators\n"));
return status;
}
}
/* add root */
if ( (ctx = talloc_init(NULL)) == NULL ) {
return NT_STATUS_NO_MEMORY;
}
fstr_sprintf( root_name, "%s\\root", get_global_sam_name() );
ret = lookup_name( ctx, root_name, 0, NULL, NULL, &root_sid, &type );
TALLOC_FREE( ctx );
if ( ret ) {
status = pdb_add_aliasmem( &global_sid_Builtin_Administrators, &root_sid );
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(0,("create_builtin_administrators: Failed to add root"
" Administrators\n"));
return status;
}
}
return NT_STATUS_OK;
}
/*******************************************************************
Create a NT token for the user, expanding local aliases
*******************************************************************/
static struct nt_user_token *create_local_nt_token(TALLOC_CTX *mem_ctx,
const DOM_SID *user_sid,
const DOM_SID *group_sid,
BOOL is_guest,
int num_groupsids,
const DOM_SID *groupsids)
{
TALLOC_CTX *tmp_ctx;
struct nt_user_token *result = NULL;
int i;
NTSTATUS status;
gid_t gid;
tmp_ctx = talloc_new(mem_ctx);
if (tmp_ctx == NULL) {
DEBUG(0, ("talloc_new failed\n"));
return NULL;
}
result = TALLOC_ZERO_P(tmp_ctx, NT_USER_TOKEN);
if (result == NULL) {
DEBUG(0, ("talloc failed\n"));
goto done;
}
/* Add the user and primary group sid */
add_sid_to_array(result, user_sid,
&result->user_sids, &result->num_sids);
add_sid_to_array(result, group_sid,
&result->user_sids, &result->num_sids);
/* Add in BUILTIN sids */
add_sid_to_array(result, &global_sid_World,
&result->user_sids, &result->num_sids);
add_sid_to_array(result, &global_sid_Network,
&result->user_sids, &result->num_sids);
if (is_guest) {
add_sid_to_array(result, &global_sid_Builtin_Guests,
&result->user_sids, &result->num_sids);
} else {
add_sid_to_array(result, &global_sid_Authenticated_Users,
&result->user_sids, &result->num_sids);
}
/* Now the SIDs we got from authentication. These are the ones from
* the info3 struct or from the pdb_enum_group_memberships, depending
* on who authenticated the user. */
for (i=0; i<num_groupsids; i++) {
add_sid_to_array_unique(result, &groupsids[i],
&result->user_sids, &result->num_sids);
}
/* Deal with the BUILTIN\Administrators group. If the SID can
be resolved then assume that the add_aliasmem( S-1-5-32 )
handled it. */
if ( !sid_to_gid( &global_sid_Builtin_Administrators, &gid ) ) {
/* We can only create a mapping if winbind is running
and the nested group functionality has been enabled */
if ( lp_winbind_nested_groups() && winbind_ping() ) {
become_root();
status = create_builtin_administrators( );
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(0,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
/* don't fail, just log the message */
}
unbecome_root();
}
else {
status = add_builtin_administrators( tmp_ctx, result );
if ( !NT_STATUS_IS_OK(status) ) {
result = NULL;
goto done;
}
}
}
/* Deal with the BUILTIN\Users group. If the SID can
be resolved then assume that the add_aliasmem( S-1-5-32 )
handled it. */
if ( !sid_to_gid( &global_sid_Builtin_Users, &gid ) ) {
/* We can only create a mapping if winbind is running
and the nested group functionality has been enabled */
if ( lp_winbind_nested_groups() && winbind_ping() ) {
become_root();
status = create_builtin_users( );
if ( !NT_STATUS_IS_OK(status) ) {
DEBUG(0,("create_local_nt_token: Failed to create BUILTIN\\Administrators group!\n"));
/* don't fail, just log the message */
}
unbecome_root();
}
}
/* Deal with local groups */
if (lp_winbind_nested_groups()) {
/* Now add the aliases. First the one from our local SAM */
status = add_aliases(tmp_ctx, get_global_sam_sid(), result);
if (!NT_STATUS_IS_OK(status)) {
result = NULL;
goto done;
}
/* Finally the builtin ones */
status = add_aliases(tmp_ctx, &global_sid_Builtin, result);
if (!NT_STATUS_IS_OK(status)) {
result = NULL;
goto done;
}
}
get_privileges_for_sids(&result->privileges, result->user_sids,
result->num_sids);
talloc_steal(mem_ctx, result);
done:
TALLOC_FREE(tmp_ctx);
return result;
}
/*
* Create the token to use from server_info->sam_account and
* server_info->sids (the info3/sam groups). Find the unix gids.
*/
NTSTATUS create_local_token(auth_serversupplied_info *server_info)
{
TALLOC_CTX *mem_ctx;
NTSTATUS status;
size_t i;
mem_ctx = talloc_new(NULL);
if (mem_ctx == NULL) {
DEBUG(0, ("talloc_new failed\n"));
return NT_STATUS_NO_MEMORY;
}
server_info->ptok = create_local_nt_token(
server_info,
pdb_get_user_sid(server_info->sam_account),
pdb_get_group_sid(server_info->sam_account),
server_info->guest,
server_info->num_sids, server_info->sids);
if ( !server_info->ptok ) {
return NT_STATUS_NO_SUCH_USER;
}
/* Convert the SIDs to gids. */
server_info->n_groups = 0;
server_info->groups = NULL;
/* Start at index 1, where the groups start. */
for (i=1; i<server_info->ptok->num_sids; i++) {
gid_t gid;
DOM_SID *sid = &server_info->ptok->user_sids[i];
if (!sid_to_gid(sid, &gid)) {
DEBUG(10, ("Could not convert SID %s to gid, "
"ignoring it\n", sid_string_static(sid)));
continue;
}
add_gid_to_array_unique(server_info, gid, &server_info->groups,
&server_info->n_groups);
}
debug_nt_user_token(DBGC_AUTH, 10, server_info->ptok);
status = log_nt_token(mem_ctx, server_info->ptok);
TALLOC_FREE(mem_ctx);
return status;
}
/*
* Create an artificial NT token given just a username. (Initially indended
* for force user)
*
* We go through lookup_name() to avoid problems we had with 'winbind use
* default domain'.
*
* We have 3 cases:
*
* unmapped unix users: Go directly to nss to find the user's group.
*
* A passdb user: The list of groups is provided by pdb_enum_group_memberships.
*
* If the user is provided by winbind, the primary gid is set to "domain
* users" of the user's domain. For an explanation why this is necessary, see
* the thread starting at
* http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
*/
NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
BOOL is_guest,
uid_t *uid, gid_t *gid,
char **found_username,
struct nt_user_token **token)
{
NTSTATUS result = NT_STATUS_NO_SUCH_USER;
TALLOC_CTX *tmp_ctx;
DOM_SID user_sid;
enum SID_NAME_USE type;
gid_t *gids;
DOM_SID primary_group_sid;
DOM_SID *group_sids;
size_t num_group_sids;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
DEBUG(0, ("talloc_new failed\n"));
return NT_STATUS_NO_MEMORY;
}
if (!lookup_name(tmp_ctx, username, LOOKUP_NAME_ALL,
NULL, NULL, &user_sid, &type)) {
DEBUG(1, ("lookup_name for %s failed\n", username));
goto done;
}
if (type != SID_NAME_USER) {
DEBUG(1, ("%s is a %s, not a user\n", username,
sid_type_lookup(type)));
goto done;
}
if (!sid_to_uid(&user_sid, uid)) {
DEBUG(1, ("sid_to_uid for %s (%s) failed\n",
username, sid_string_static(&user_sid)));
goto done;
}
if (sid_check_is_in_unix_users(&user_sid)) {
/* This is a unix user not in passdb. We need to ask nss
* directly, without consulting passdb */
struct passwd *pass;
size_t i;
pass = getpwuid_alloc(tmp_ctx, *uid);
if (pass == NULL) {
DEBUG(1, ("getpwuid(%d) for user %s failed\n",
*uid, username));
goto done;
}
*gid = pass->pw_gid;
gid_to_sid(&primary_group_sid, pass->pw_gid);
if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
&gids, &num_group_sids)) {
DEBUG(1, ("getgroups_unix_user for user %s failed\n",
username));
goto done;
}
group_sids = talloc_array(tmp_ctx, DOM_SID, num_group_sids);
if (group_sids == NULL) {
DEBUG(1, ("talloc_array failed\n"));
result = NT_STATUS_NO_MEMORY;
goto done;
}
for (i=0; i<num_group_sids; i++) {
gid_to_sid(&group_sids[i], gids[i]);
}
*found_username = talloc_strdup(mem_ctx, pass->pw_name);
} else if (sid_check_is_in_our_domain(&user_sid)) {
/* This is a passdb user, so ask passdb */
struct samu *sam_acct = NULL;
if ( !(sam_acct = samu_new( tmp_ctx )) ) {
goto done;
}
if (!pdb_getsampwsid(sam_acct, &user_sid)) {
DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
sid_string_static(&user_sid), username));
result = NT_STATUS_NO_SUCH_USER;
goto done;
}
sid_copy(&primary_group_sid, pdb_get_group_sid(sam_acct));
result = pdb_enum_group_memberships(tmp_ctx, sam_acct,
&group_sids, &gids,
&num_group_sids);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(10, ("enum_group_memberships failed for %s\n",
username));
goto done;
}
*found_username = talloc_strdup(mem_ctx,
pdb_get_username(sam_acct));
} else {
/* This user is from winbind, force the primary gid to the
* user's "domain users" group. Under certain circumstances
* (user comes from NT4), this might be a loss of
* information. But we can not rely on winbind getting the
* correct info. AD might prohibit winbind looking up that
* information. */
uint32 dummy;
sid_copy(&primary_group_sid, &user_sid);
sid_split_rid(&primary_group_sid, &dummy);
sid_append_rid(&primary_group_sid, DOMAIN_GROUP_RID_USERS);
if (!sid_to_gid(&primary_group_sid, gid)) {
DEBUG(1, ("sid_to_gid(%s) failed\n",
sid_string_static(&primary_group_sid)));
goto done;
}
num_group_sids = 0;
group_sids = NULL;
*found_username = talloc_strdup(mem_ctx, username);
}
*token = create_local_nt_token(mem_ctx, &user_sid, &primary_group_sid,
is_guest, num_group_sids, group_sids);
if ((*token == NULL) || (*found_username == NULL)) {
result = NT_STATUS_NO_MEMORY;
goto done;
}
result = NT_STATUS_OK;
done:
TALLOC_FREE(tmp_ctx);
return result;
}
/***************************************************************************
Build upon create_token_from_username:
Expensive helper function to figure out whether a user given its name is
member of a particular group.
***************************************************************************/
BOOL user_in_group_sid(const char *username, const DOM_SID *group_sid)
{
NTSTATUS status;
uid_t uid;
gid_t gid;
char *found_username;
struct nt_user_token *token;
BOOL result;
TALLOC_CTX *mem_ctx;
mem_ctx = talloc_new(NULL);
if (mem_ctx == NULL) {
DEBUG(0, ("talloc_new failed\n"));
return False;
}
status = create_token_from_username(mem_ctx, username, False,
&uid, &gid, &found_username,
&token);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("could not create token for %s\n", username));
return False;
}
result = nt_token_check_sid(group_sid, token);
TALLOC_FREE(mem_ctx);
return result;
}
BOOL user_in_group(const char *username, const char *groupname)
{
TALLOC_CTX *mem_ctx;
DOM_SID group_sid;
NTSTATUS status;
BOOL ret;
mem_ctx = talloc_new(NULL);
if (mem_ctx == NULL) {
DEBUG(0, ("talloc_new failed\n"));
return False;
}
ret = lookup_name(mem_ctx, groupname, LOOKUP_NAME_ALL,
NULL, NULL, &group_sid, NULL);
TALLOC_FREE(mem_ctx);
if (!ret) {
DEBUG(10, ("lookup_name(%s) failed: %s\n", groupname,
nt_errstr(status)));
return False;
}
return user_in_group_sid(username, &group_sid);
}
/***************************************************************************
Make (and fill) a user_info struct from a 'struct passwd' by conversion
to a struct samu
***************************************************************************/
NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
char *unix_username,
struct passwd *pwd)
{
NTSTATUS status;
struct samu *sampass = NULL;
gid_t *gids;
auth_serversupplied_info *result;
if ( !(sampass = samu_new( NULL )) ) {
return NT_STATUS_NO_MEMORY;
}
status = samu_set_unix( sampass, pwd );
if (!NT_STATUS_IS_OK(status)) {
return status;
}
result = make_server_info(NULL);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(sampass);
return status;
}
result->sam_account = sampass;
result->unix_name = talloc_strdup(result, unix_username);
result->uid = pwd->pw_uid;
result->gid = pwd->pw_gid;
status = pdb_enum_group_memberships(result, sampass,
&result->sids, &gids,
&result->num_sids);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("pdb_enum_group_memberships failed: %s\n",
nt_errstr(status)));
TALLOC_FREE(result);
return status;
}
/* For now we throw away the gids and convert via sid_to_gid
* later. This needs fixing, but I'd like to get the code straight and
* simple first. */
TALLOC_FREE(gids);
*server_info = result;
return NT_STATUS_OK;
}
/***************************************************************************
Make (and fill) a user_info struct for a guest login.
This *must* succeed for smbd to start. If there is no mapping entry for
the guest gid, then create one.
**********************
*****************************************************/
static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
{
NTSTATUS status;
struct samu *sampass = NULL;
DOM_SID guest_sid;
BOOL ret;
static const char zeros[16];
if ( !(sampass = samu_new( NULL )) ) {
return NT_STATUS_NO_MEMORY;
}
sid_copy(&guest_sid, get_global_sam_sid());
sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
become_root();
ret = pdb_getsampwsid(sampass, &guest_sid);
unbecome_root();
if (!ret) {
TALLOC_FREE(sampass);
return NT_STATUS_NO_SUCH_USER;
}
status = make_server_info_sam(server_info, sampass);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(sampass);
return status;
}
(*server_info)->guest = True;
status = create_local_token(*server_info);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("create_local_token failed: %s\n",
nt_errstr(status)));
return status;
}
/* annoying, but the Guest really does have a session key, and it is
all zeros! */
(*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
(*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
return NT_STATUS_OK;
}
static auth_serversupplied_info *copy_serverinfo(auth_serversupplied_info *src)
{
auth_serversupplied_info *dst;
dst = make_server_info(NULL);
if (dst == NULL) {
return NULL;
}
dst->guest = src->guest;
dst->uid = src->uid;
dst->gid = src->gid;
dst->n_groups = src->n_groups;
if (src->n_groups != 0)
dst->groups = talloc_memdup(dst, src->groups,
sizeof(gid_t)*dst->n_groups);
else
dst->groups = NULL;
dst->ptok = dup_nt_token(dst, src->ptok);
dst->user_session_key = data_blob_talloc( dst, src->user_session_key.data,
src->user_session_key.length);
dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
src->lm_session_key.length);
if ( (dst->sam_account = samu_new( NULL )) != NULL )
pdb_copy_sam_account(dst->sam_account, src->sam_account);
dst->pam_handle = NULL;
dst->unix_name = talloc_strdup(dst, src->unix_name);
return dst;
}
static auth_serversupplied_info *guest_info = NULL;
BOOL init_guest_info(void)
{
if (guest_info != NULL)
return True;
return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
}
NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
{
*server_info = copy_serverinfo(guest_info);
return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
}
/***************************************************************************
Purely internal function for make_server_info_info3
Fill the sam account from getpwnam
***************************************************************************/
static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
const char *domain,
const char *username,
char **found_username,
uid_t *uid, gid_t *gid,
struct samu *account)
{
NTSTATUS nt_status;
fstring dom_user, lower_username;
fstring real_username;
struct passwd *passwd;
fstrcpy( lower_username, username );
strlower_m( lower_username );
fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
lower_username);
/* Get the passwd struct. Try to create the account is necessary. */
map_username( dom_user );
if ( !(passwd = smb_getpwnam( NULL, dom_user, real_username, True )) )
return NT_STATUS_NO_SUCH_USER;
*uid = passwd->pw_uid;
*gid = passwd->pw_gid;
/* This is pointless -- there is no suport for differing
unix and windows names. Make sure to always store the
one we actually looked up and succeeded. Have I mentioned
why I hate the 'winbind use default domain' parameter?
--jerry */
*found_username = talloc_strdup( mem_ctx, real_username );
DEBUG(5,("fill_sam_account: located username was [%s]\n", *found_username));
nt_status = samu_set_unix( account, passwd );
TALLOC_FREE(passwd);
return nt_status;
}
/****************************************************************************
Wrapper to allow the getpwnam() call to strip the domain name and
try again in case a local UNIX user is already there. Also run through
the username if we fallback to the username only.
****************************************************************************/
struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, char *domuser,
fstring save_username, BOOL create )
{
struct passwd *pw = NULL;
char *p;
fstring username;
/* we only save a copy of the username it has been mangled
by winbindd use default domain */
save_username[0] = '\0';
/* don't call map_username() here since it has to be done higher
up the stack so we don't call it mutliple times */
fstrcpy( username, domuser );
p = strchr_m( username, *lp_winbind_separator() );
/* code for a DOMAIN\user string */
if ( p ) {
fstring strip_username;
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 ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
char *domain;
/* split the domain and username into 2 strings */
*p = '\0';
domain = username;
fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
}
else
fstrcpy( save_username, pw->pw_name );
/* whew -- done! */
return pw;
}
/* setup for lookup of just the username */
/* remember that p and username are overlapping memory */
p++;
fstrcpy( strip_username, p );
fstrcpy( username, strip_username );
}
/* just lookup a plain username */
pw = Get_Pwnam_alloc(mem_ctx, username);
/* Create local user if requested. */
if ( !pw && create ) {
/* 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 )
fstrcpy( save_username, pw->pw_name );
return pw;
}
/***************************************************************************
Make a server_info struct from the info3 returned by a domain logon
***************************************************************************/
NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
const char *internal_username,
const char *sent_nt_username,
const char *domain,
auth_serversupplied_info **server_info,
NET_USER_INFO_3 *info3)
{
static const char zeros[16];
NTSTATUS nt_status = NT_STATUS_OK;
char *found_username;
const char *nt_domain;
const char *nt_username;
struct samu *sam_account = NULL;
DOM_SID user_sid;
DOM_SID group_sid;
uid_t uid;
gid_t gid;
size_t i;
auth_serversupplied_info *result;
/*
Here is where we should check the list of
trusted domains, and verify that the SID
matches.
*/
sid_copy(&user_sid, &info3->dom_sid.sid);
if (!sid_append_rid(&user_sid, info3->user_rid)) {
return NT_STATUS_INVALID_PARAMETER;
}
sid_copy(&group_sid, &info3->dom_sid.sid);
if (!sid_append_rid(&group_sid, info3->group_rid)) {
return NT_STATUS_INVALID_PARAMETER;
}
if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
/* If the server didn't give us one, just use the one we sent
* them */
nt_username = sent_nt_username;
}
if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
/* If the server didn't give us one, just use the one we sent
* them */
nt_domain = domain;
}
/* try to fill the SAM account.. If getpwnam() fails, then try the
add user script (2.2.x behavior).
We use the _unmapped_ username here in an attempt to provide
consistent username mapping behavior between kerberos and NTLM[SSP]
authentication in domain mode security. I.E. Username mapping
should be applied to the fully qualified username
(e.g. DOMAIN\user) and not just the login name. Yes this means we
called map_username() unnecessarily in make_user_info_map() but
that is how the current code is designed. Making the change here
is the least disruptive place. -- jerry */
if ( !(sam_account = samu_new( NULL )) ) {
return NT_STATUS_NO_MEMORY;
}
nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
&found_username, &uid, &gid, sam_account);
if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
DEBUG(3,("User %s does not exist, trying to add it\n",
internal_username));
smb_create_user( nt_domain, sent_nt_username, NULL);
nt_status = fill_sam_account( mem_ctx, nt_domain, sent_nt_username,
&found_username, &uid, &gid, sam_account );
}
/* if we still don't have a valid unix account check for
'map to guest = bad uid' */
if (!NT_STATUS_IS_OK(nt_status)) {
TALLOC_FREE( sam_account );
if ( lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID ) {
make_server_info_guest(server_info);
return NT_STATUS_OK;
}
return nt_status;
}
if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_UNSUCCESSFUL;
}
if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_UNSUCCESSFUL;
}
if (!pdb_set_fullname(sam_account,
unistr2_static(&(info3->uni_full_name)),
PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_logon_script(sam_account,
unistr2_static(&(info3->uni_logon_script)),
PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_profile_path(sam_account,
unistr2_static(&(info3->uni_profile_path)),
PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_homedir(sam_account,
unistr2_static(&(info3->uni_home_dir)),
PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_dir_drive(sam_account,
unistr2_static(&(info3->uni_dir_drive)),
PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_acct_ctrl(sam_account, info3->acct_flags, PDB_CHANGED)) {
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
result = make_server_info(NULL);
if (result == NULL) {
DEBUG(4, ("make_server_info failed!\n"));
TALLOC_FREE(sam_account);
return NT_STATUS_NO_MEMORY;
}
/* save this here to _net_sam_logon() doesn't fail (it assumes a
valid struct samu) */
result->sam_account = sam_account;
result->unix_name = talloc_strdup(result, found_username);
/* Fill in the unix info we found on the way */
result->uid = uid;
result->gid = gid;
/* Create a 'combined' list of all SIDs we might want in the SD */
result->num_sids = 0;
result->sids = NULL;
/* and create (by appending rids) the 'domain' sids */
for (i = 0; i < info3->num_groups2; i++) {
DOM_SID sid;
if (!sid_compose(&sid, &info3->dom_sid.sid,
info3->gids[i].g_rid)) {
DEBUG(3,("could not append additional group rid "
"0x%x\n", info3->gids[i].g_rid));
TALLOC_FREE(result);
return NT_STATUS_INVALID_PARAMETER;
}
add_sid_to_array(result, &sid, &result->sids,
&result->num_sids);
}
/* Copy 'other' sids. We need to do sid filtering here to
prevent possible elevation of privileges. See:
http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
*/
for (i = 0; i < info3->num_other_sids; i++) {
add_sid_to_array(result, &info3->other_sids[i].sid,
&result->sids,
&result->num_sids);
}
result->login_server = unistr2_tdup(result,
&(info3->uni_logon_srv));
/* ensure we are never given NULL session keys */
if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
result->user_session_key = data_blob(NULL, 0);
} else {
result->user_session_key = data_blob_talloc(
result, info3->user_sess_key,
sizeof(info3->user_sess_key));
}
if (memcmp(info3->lm_sess_key, zeros, 8) == 0) {
result->lm_session_key = data_blob(NULL, 0);
} else {
result->lm_session_key = data_blob_talloc(
result, info3->lm_sess_key,
sizeof(info3->lm_sess_key));
}
*server_info = result;
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) {
DEBUG(10,("structure was created for %s\n",
(*user_info)->smb_name));
}
SAFE_FREE((*user_info)->smb_name);
SAFE_FREE((*user_info)->internal_username);
SAFE_FREE((*user_info)->client_domain);
SAFE_FREE((*user_info)->domain);
SAFE_FREE((*user_info)->wksta_name);
data_blob_free(&(*user_info)->lm_resp);
data_blob_free(&(*user_info)->nt_resp);
data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
data_blob_clear_free(&(*user_info)->plaintext_password);
ZERO_STRUCT(**user_info);
}
SAFE_FREE(*user_info);
}
/***************************************************************************
Make an auth_methods struct
***************************************************************************/
BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
{
if (!auth_context) {
smb_panic("no auth_context supplied to "
"make_auth_methods()!\n");
}
if (!auth_method) {
smb_panic("make_auth_methods: pointer to auth_method pointer "
"is NULL!\n");
}
*auth_method = TALLOC_P(auth_context->mem_ctx, auth_methods);
if (!*auth_method) {
DEBUG(0,("make_auth_method: malloc failed!\n"));
return False;
}
ZERO_STRUCTP(*auth_method);
return True;
}
/****************************************************************************
Duplicate a SID token.
****************************************************************************/
NT_USER_TOKEN *dup_nt_token(TALLOC_CTX *mem_ctx, NT_USER_TOKEN *ptoken)
{
NT_USER_TOKEN *token;
if (!ptoken)
return NULL;
token = TALLOC_P(mem_ctx, NT_USER_TOKEN);
if (token == NULL) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
token->user_sids = talloc_memdup(token, ptoken->user_sids,
sizeof(DOM_SID) * ptoken->num_sids );
if ((ptoken->user_sids != NULL) && (token->user_sids == NULL)) {
DEBUG(0, ("talloc_memdup failed\n"));
TALLOC_FREE(token);
return NULL;
}
token->num_sids = ptoken->num_sids;
/* copy the privileges; don't consider failure to be critical here */
if ( !se_priv_copy( &token->privileges, &ptoken->privileges ) ) {
DEBUG(0,("dup_nt_token: Failure to copy SE_PRIV!. "
"Continuing with 0 privileges assigned.\n"));
}
return token;
}
/****************************************************************************
Check for a SID in an NT_USER_TOKEN
****************************************************************************/
BOOL nt_token_check_sid ( const DOM_SID *sid, const NT_USER_TOKEN *token )
{
int i;
if ( !sid || !token )
return False;
for ( i=0; i<token->num_sids; i++ ) {
if ( sid_equal( sid, &token->user_sids[i] ) )
return True;
}
return False;
}
BOOL nt_token_check_domain_rid( NT_USER_TOKEN *token, uint32 rid )
{
DOM_SID domain_sid;
/* if we are a domain member, the get the domain SID, else for
a DC or standalone server, use our own SID */
if ( lp_server_role() == ROLE_DOMAIN_MEMBER ) {
if ( !secrets_fetch_domain_sid( lp_workgroup(),
&domain_sid ) ) {
DEBUG(1,("nt_token_check_domain_rid: Cannot lookup "
"SID for domain [%s]\n", lp_workgroup()));
return False;
}
}
else
sid_copy( &domain_sid, get_global_sam_sid() );
sid_append_rid( &domain_sid, rid );
return nt_token_check_sid( &domain_sid, token );\
}
/**
* Verify whether or not given domain is trusted.
*
* @param domain_name name of the domain to be verified
* @return true if domain is one of the trusted once or
* false if otherwise
**/
BOOL is_trusted_domain(const char* dom_name)
{
DOM_SID trustdom_sid;
BOOL ret;
/* no trusted domains for a standalone server */
if ( lp_server_role() == ROLE_STANDALONE )
return False;
/* if we are a DC, then check for a direct trust relationships */
if ( IS_DC ) {
become_root();
DEBUG (5,("is_trusted_domain: Checking for domain trust with "
"[%s]\n", dom_name ));
ret = secrets_fetch_trusted_domain_password(dom_name, NULL,
NULL, NULL);
unbecome_root();
if (ret)
return True;
}
else {
NSS_STATUS result;
/* If winbind is around, ask it */
result = wb_is_trusted_domain(dom_name);
if (result == NSS_STATUS_SUCCESS) {
return True;
}
if (result == NSS_STATUS_NOTFOUND) {
/* winbind could not find the domain */
return False;
}
/* The only other possible result is that winbind is not up
and running. We need to update the trustdom_cache
ourselves */
update_trustdom_cache();
}
/* now the trustdom cache should be available a DC could still
* have a transitive trust so fall back to the cache of trusted
* domains (like a domain member would use */
if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
return True;
}
return False;
}
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