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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
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
extern DOM_SID global_sid_World;
extern DOM_SID global_sid_Network;
extern DOM_SID global_sid_Builtin_Guests;
extern DOM_SID global_sid_Authenticated_Users;
/****************************************************************************
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);
DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
return ret;
}
/****************************************************************************
Add and Delete UNIX users on demand, based on NTSTATUS codes.
****************************************************************************/
void auth_add_user_script(const char *domain, const char *username)
{
struct passwd *pwd=NULL;
/*
* User validated ok against Domain controller.
* If the admin wants us to try and create a UNIX
* user on the fly, do so.
*/
if(lp_adduser_script() && !(pwd = Get_Pwnam(username))) {
smb_create_user(domain, username, NULL);
}
}
/****************************************************************************
Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from
unix info.
****************************************************************************/
NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account)
{
BOOL pdb_ret;
NTSTATUS nt_status;
if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) {
return nt_status;
}
become_root();
pdb_ret = pdb_getsampwnam(*account, user);
unbecome_root();
if (!pdb_ret) {
struct passwd *pass = Get_Pwnam(user);
if (!pass)
return NT_STATUS_NO_SUCH_USER;
if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) {
return nt_status;
}
}
return NT_STATUS_OK;
}
/****************************************************************************
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 plaintext,
uint32 auth_flags, BOOL encrypted)
{
DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
*user_info = malloc(sizeof(**user_info));
if (!user_info) {
DEBUG(0,("malloc failed for user_info (size %d)\n", 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.str = strdup(smb_name);
if ((*user_info)->smb_name.str) {
(*user_info)->smb_name.len = strlen(smb_name);
} else {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
(*user_info)->internal_username.str = strdup(internal_username);
if ((*user_info)->internal_username.str) {
(*user_info)->internal_username.len = strlen(internal_username);
} else {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
(*user_info)->domain.str = strdup(domain);
if ((*user_info)->domain.str) {
(*user_info)->domain.len = strlen(domain);
} else {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
(*user_info)->client_domain.str = strdup(client_domain);
if ((*user_info)->client_domain.str) {
(*user_info)->client_domain.len = strlen(client_domain);
} else {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
(*user_info)->wksta_name.str = strdup(wksta_name);
if ((*user_info)->wksta_name.str) {
(*user_info)->wksta_name.len = strlen(wksta_name);
} else {
free_user_info(user_info);
return NT_STATUS_NO_MEMORY;
}
DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
(*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
(*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
(*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
(*user_info)->encrypted = encrypted;
(*user_info)->auth_flags = auth_flags;
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 plaintext,
uint32 ntlmssp_flags, 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) )
domain = get_default_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,
plaintext, ntlmssp_flags, 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,
const uchar *lm_network_pwd, int lm_pwd_len,
const uchar *nt_network_pwd, int nt_pwd_len)
{
BOOL ret;
NTSTATUS nt_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);
DATA_BLOB plaintext_blob = data_blob(NULL, 0);
uint32 auth_flags = AUTH_FLAG_NONE;
if (lm_pwd_len)
auth_flags |= AUTH_FLAG_LM_RESP;
if (nt_pwd_len == 24) {
auth_flags |= AUTH_FLAG_NTLM_RESP;
} else if (nt_pwd_len != 0) {
auth_flags |= AUTH_FLAG_NTLMv2_RESP;
}
nt_status = make_user_info_map(user_info,
smb_name, client_domain,
wksta_name,
lm_blob, nt_blob,
plaintext_blob,
auth_flags, True);
ret = NT_STATUS_IS_OK(nt_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,
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];
uint32 auth_flags = AUTH_FLAG_NONE;
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
SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_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
SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
/* Password info paranoia */
ZERO_STRUCT(lm_pwd);
ZERO_STRUCT(nt_pwd);
ZERO_STRUCT(key);
{
BOOL ret;
NTSTATUS nt_status;
DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
DATA_BLOB plaintext_blob = data_blob(NULL, 0);
if (lm_interactive_pwd)
auth_flags |= AUTH_FLAG_LM_RESP;
if (nt_interactive_pwd)
auth_flags |= AUTH_FLAG_NTLM_RESP;
nt_status = make_user_info_map(user_info,
smb_name, client_domain,
wksta_name,
local_lm_blob,
local_nt_blob,
plaintext_blob,
auth_flags, True);
ret = NT_STATUS_IS_OK(nt_status) ? True : False;
data_blob_free(&local_lm_blob);
data_blob_free(&local_nt_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;
uint32 auth_flags = AUTH_FLAG_NONE;
/*
* 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",plaintext_password.length));
dump_data(100, plaintext_password.data, plaintext_password.length);
#endif
SMBencrypt( (const uchar *)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);
auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
} 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,
local_nt_blob,
plaintext_password,
auth_flags, 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)
{
uint32 auth_flags = AUTH_FLAG_NONE;
DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
if (lm_resp.length == 24) {
auth_flags |= AUTH_FLAG_LM_RESP;
}
if (nt_resp.length == 0) {
} else if (nt_resp.length == 24) {
auth_flags |= AUTH_FLAG_NTLM_RESP;
} else {
auth_flags |= AUTH_FLAG_NTLMv2_RESP;
}
return make_user_info_map(user_info, smb_name,
client_domain,
get_remote_machine_name(),
lm_resp,
nt_resp,
no_plaintext_blob,
auth_flags, True);
}
/****************************************************************************
Create a guest user_info blob, for anonymous authenticaion.
****************************************************************************/
BOOL make_user_info_guest(auth_usersupplied_info **user_info)
{
DATA_BLOB lm_blob = data_blob(NULL, 0);
DATA_BLOB nt_blob = data_blob(NULL, 0);
DATA_BLOB plaintext_blob = data_blob(NULL, 0);
uint32 auth_flags = AUTH_FLAG_NONE;
NTSTATUS nt_status;
nt_status = make_user_info(user_info,
"","",
"","",
"",
nt_blob, lm_blob,
plaintext_blob,
auth_flags, 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)
{
fstring sid_str;
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_to_string(sid_str, &token->user_sids[0]) ));
DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
for (i = 0; i < token->num_sids; i++)
DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
sid_to_string(sid_str, &token->user_sids[i])));
}
/****************************************************************************
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 the SID list for this user.
****************************************************************************/
static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
int n_groupSIDs, DOM_SID *groupSIDs,
BOOL is_guest, NT_USER_TOKEN **token)
{
NTSTATUS nt_status = NT_STATUS_OK;
NT_USER_TOKEN *ptoken;
int i;
int sid_ndx;
if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
nt_status = NT_STATUS_NO_MEMORY;
return nt_status;
}
ZERO_STRUCTP(ptoken);
ptoken->num_sids = n_groupSIDs + 5;
if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
nt_status = NT_STATUS_NO_MEMORY;
return nt_status;
}
memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
/*
* Note - user SID *MUST* be first in token !
* se_access_check depends on this.
*
* Primary group SID is second in token. Convention.
*/
sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
if (group_sid)
sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
/*
* Finally add the "standard" SIDs.
* The only difference between guest and "anonymous" (which we
* don't really support) is the addition of Authenticated_Users.
*/
sid_copy(&ptoken->user_sids[2], &global_sid_World);
sid_copy(&ptoken->user_sids[3], &global_sid_Network);
if (is_guest)
sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
else
sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
sid_ndx = 5; /* next available spot */
for (i = 0; i < n_groupSIDs; i++) {
size_t check_sid_idx;
for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
if (sid_equal(&ptoken->user_sids[check_sid_idx],
&groupSIDs[i])) {
break;
}
}
if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
} else {
ptoken->num_sids--;
}
}
debug_nt_user_token(DBGC_AUTH, 10, ptoken);
*token = ptoken;
return nt_status;
}
/****************************************************************************
Create the SID list for this user.
****************************************************************************/
NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
{
DOM_SID user_sid;
DOM_SID group_sid;
DOM_SID *group_sids;
NT_USER_TOKEN *token;
int i;
if (!NT_STATUS_IS_OK(uid_to_sid(&user_sid, uid))) {
return NULL;
}
if (!NT_STATUS_IS_OK(gid_to_sid(&group_sid, gid))) {
return NULL;
}
group_sids = malloc(sizeof(DOM_SID) * ngroups);
if (!group_sids) {
DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
return NULL;
}
for (i = 0; i < ngroups; i++) {
if (!NT_STATUS_IS_OK(gid_to_sid(&(group_sids)[i], (groups)[i]))) {
DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
SAFE_FREE(group_sids);
return NULL;
}
}
if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
ngroups, group_sids, is_guest, &token))) {
SAFE_FREE(group_sids);
return NULL;
}
SAFE_FREE(group_sids);
return token;
}
/******************************************************************************
* this function returns the groups (SIDs) of the local SAM the user is in.
* If this samba server is a DC of the domain the user belongs to, it returns
* both domain groups and local / builtin groups. If the user is in a trusted
* domain, or samba is a member server of a domain, then this function returns
* local and builtin groups the user is a member of.
*
* currently this is a hack, as there is no sam implementation that is capable
* of groups.
******************************************************************************/
static NTSTATUS get_user_groups_from_local_sam(const char *username, uid_t uid, gid_t gid,
int *n_groups, DOM_SID **groups, gid_t **unix_groups)
{
int n_unix_groups;
int i;
*n_groups = 0;
*groups = NULL;
n_unix_groups = groups_max();
if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) {
DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
return NT_STATUS_NO_MEMORY;
}
if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
gid_t *groups_tmp;
groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
if (!groups_tmp) {
SAFE_FREE(*unix_groups);
return NT_STATUS_NO_MEMORY;
}
*unix_groups = groups_tmp;
if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
SAFE_FREE(*unix_groups);
return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
}
}
debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
if (n_unix_groups > 0) {
*groups = malloc(sizeof(DOM_SID) * n_unix_groups);
if (!*groups) {
DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
SAFE_FREE(*unix_groups);
return NT_STATUS_NO_MEMORY;
}
}
*n_groups = n_unix_groups;
for (i = 0; i < *n_groups; i++) {
if (!NT_STATUS_IS_OK(gid_to_sid(&(*groups)[i], (*unix_groups)[i]))) {
DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1]));
SAFE_FREE(*groups);
SAFE_FREE(*unix_groups);
return NT_STATUS_NO_SUCH_USER;
}
}
return NT_STATUS_OK;
}
/***************************************************************************
Make a user_info struct
***************************************************************************/
static NTSTATUS make_server_info(auth_serversupplied_info **server_info)
{
*server_info = malloc(sizeof(**server_info));
if (!*server_info) {
DEBUG(0,("make_server_info: malloc failed!\n"));
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCTP(*server_info);
return NT_STATUS_OK;
}
/***************************************************************************
Fill a server_info struct from a SAM_ACCOUNT with their groups
***************************************************************************/
static NTSTATUS add_user_groups(auth_serversupplied_info **server_info,
SAM_ACCOUNT *sampass,
uid_t uid, gid_t gid)
{
NTSTATUS nt_status;
const DOM_SID *user_sid = pdb_get_user_sid(sampass);
const DOM_SID *group_sid = pdb_get_group_sid(sampass);
int n_groupSIDs = 0;
DOM_SID *groupSIDs = NULL;
gid_t *unix_groups = NULL;
NT_USER_TOKEN *token;
BOOL is_guest;
uint32 rid;
nt_status = get_user_groups_from_local_sam(pdb_get_username(sampass),
uid, gid,
&n_groupSIDs, &groupSIDs,
&unix_groups);
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(4,("get_user_groups_from_local_sam failed\n"));
free_server_info(server_info);
return nt_status;
}
is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
n_groupSIDs, groupSIDs, is_guest,
&token)))
{
DEBUG(4,("create_nt_user_token failed\n"));
SAFE_FREE(groupSIDs);
SAFE_FREE(unix_groups);
free_server_info(server_info);
return nt_status;
}
SAFE_FREE(groupSIDs);
(*server_info)->n_groups = n_groupSIDs;
(*server_info)->groups = unix_groups;
(*server_info)->ptok = token;
return nt_status;
}
/***************************************************************************
Make (and fill) a user_info struct from a SAM_ACCOUNT
***************************************************************************/
NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
SAM_ACCOUNT *sampass)
{
NTSTATUS nt_status;
struct passwd *pwd;
if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info)))
return nt_status;
(*server_info)->sam_account = sampass;
if (!NT_STATUS_IS_OK(nt_status = sid_to_uid(pdb_get_user_sid(sampass), &((*server_info)->uid))))
return nt_status;
if (!(pwd = getpwuid_alloc(((*server_info)->uid)))) {
fstring sid;
DEBUG(1, ("User %s in passdb (%s) maps to UID, but getpwuid(%u) fails!\n",
pdb_get_username(sampass),
sid_to_string(sid, pdb_get_user_sid(sampass)),
(unsigned)(*server_info)->uid));
free_server_info(server_info);
return NT_STATUS_NO_SUCH_USER;
}
(*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
passwd_free(&pwd);
if (!NT_STATUS_IS_OK(nt_status = sid_to_gid(pdb_get_group_sid(sampass),
&((*server_info)->gid)))) {
free_server_info(server_info);
return nt_status;
}
if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass,
(*server_info)->uid,
(*server_info)->gid))) {
free_server_info(server_info);
return nt_status;
}
(*server_info)->sam_fill_level = SAM_FILL_ALL;
DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
pdb_get_username(sampass),
(*server_info)->unix_name));
return nt_status;
}
/***************************************************************************
Make (and fill) a user_info struct from a 'struct passwd' by conversion
to a SAM_ACCOUNT
***************************************************************************/
NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
{
NTSTATUS nt_status;
SAM_ACCOUNT *sampass = NULL;
if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
return nt_status;
}
if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
return nt_status;
}
(*server_info)->sam_account = sampass;
if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass, pwd->pw_uid, pwd->pw_gid))) {
return nt_status;
}
(*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
(*server_info)->sam_fill_level = SAM_FILL_ALL;
(*server_info)->uid = pwd->pw_uid;
(*server_info)->gid = pwd->pw_gid;
return nt_status;
}
/***************************************************************************
Make (and fill) a user_info struct for a guest login.
***************************************************************************/
NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
{
NTSTATUS nt_status;
SAM_ACCOUNT *sampass = NULL;
DOM_SID guest_sid;
if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
return nt_status;
}
sid_copy(&guest_sid, get_global_sam_sid());
sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
become_root();
if (!pdb_getsampwsid(sampass, &guest_sid)) {
unbecome_root();
return NT_STATUS_NO_SUCH_USER;
}
unbecome_root();
nt_status = make_server_info_sam(server_info, sampass);
if (NT_STATUS_IS_OK(nt_status)) {
(*server_info)->guest = True;
}
return nt_status;
}
/***************************************************************************
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,
SAM_ACCOUNT **sam_account)
{
fstring dom_user;
struct passwd *passwd;
fstr_sprintf(dom_user, "%s%s%s",
domain, lp_winbind_separator(), username);
passwd = Get_Pwnam(dom_user);
/* if the lookup for DOMAIN\username failed, try again
with just 'username'. This is need for accessing the server
as a trust user that actually maps to a local account */
if ( !passwd )
passwd = Get_Pwnam(username);
if (passwd == NULL)
return NT_STATUS_NO_SUCH_USER;
*uid = passwd->pw_uid;
*gid = passwd->pw_gid;
*found_username = talloc_strdup(mem_ctx, passwd->pw_name);
return pdb_init_sam_pw(sam_account, passwd);
}
/***************************************************************************
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)
{
NTSTATUS nt_status = NT_STATUS_OK;
char *found_username;
const char *nt_domain;
const char *nt_username;
SAM_ACCOUNT *sam_account = NULL;
DOM_SID user_sid;
DOM_SID group_sid;
struct passwd *passwd;
unid_t u_id, g_id;
uid_t uid;
gid_t gid;
int u_type, g_type;
int n_lgroupSIDs;
DOM_SID *lgroupSIDs = NULL;
gid_t *unix_groups = NULL;
NT_USER_TOKEN *token;
DOM_SID *all_group_SIDs;
size_t i;
/*
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 */
domain = domain;
}
u_type = ID_USERID;
g_type = ID_GROUPID;
/* we are trying to check that idmap isn't stuffing us over - does this
user actually exist? */
if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&u_id, &u_type, &user_sid))
&& NT_STATUS_IS_OK(idmap_get_id_from_sid(&g_id, &g_type, &group_sid))
&& ((passwd = getpwuid_alloc(u_id.uid)))) {
nt_status = pdb_init_sam_pw(&sam_account, passwd);
uid = passwd->pw_uid;
gid = passwd->pw_gid;
/* we should check this is the same name */
found_username = talloc_strdup(mem_ctx, passwd->pw_name);
passwd_free(&passwd);
} else {
/* User not from winbind - try and find them by getpwnam() */
nt_status = fill_sam_account(mem_ctx, nt_domain,
internal_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));
auth_add_user_script(nt_domain, internal_username);
nt_status = fill_sam_account(mem_ctx, nt_domain,
internal_username,
&found_username,
&uid, &gid,
&sam_account);
}
}
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
return nt_status;
}
if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_UNSUCCESSFUL;
}
if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_UNSUCCESSFUL;
}
if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)),
PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
pdb_free_sam(&sam_account);
return NT_STATUS_NO_MEMORY;
}
if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
DEBUG(4, ("make_server_info failed!\n"));
pdb_free_sam(&sam_account);
return nt_status;
}
/* save this here to _net_sam_logon() doesn't fail (it assumes a
valid SAM_ACCOUNT) */
(*server_info)->sam_account = sam_account;
(*server_info)->unix_name = smb_xstrdup(found_username);
/* Fill in the unix info we found on the way */
(*server_info)->sam_fill_level = SAM_FILL_ALL;
(*server_info)->uid = uid;
(*server_info)->gid = gid;
/* Store the user group information in the server_info
returned to the caller. */
if (!NT_STATUS_IS_OK(nt_status
= get_user_groups_from_local_sam((*server_info)->unix_name,
uid, gid,
&n_lgroupSIDs,
&lgroupSIDs,
&unix_groups)))
{
DEBUG(4,("get_user_groups_from_local_sam failed\n"));
return nt_status;
}
(*server_info)->groups = unix_groups;
(*server_info)->n_groups = n_lgroupSIDs;
/* Create a 'combined' list of all SIDs we might want in the SD */
all_group_SIDs = malloc(sizeof(DOM_SID) *
(n_lgroupSIDs + info3->num_groups2 +
info3->num_other_sids));
if (!all_group_SIDs) {
DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
SAFE_FREE(lgroupSIDs);
free_server_info(server_info);
return NT_STATUS_NO_MEMORY;
}
/* Copy the 'local' sids */
memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
SAFE_FREE(lgroupSIDs);
/* and create (by appending rids) the 'domain' sids */
for (i = 0; i < info3->num_groups2; i++) {
sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
nt_status = NT_STATUS_INVALID_PARAMETER;
DEBUG(3,("could not append additional group rid 0x%x\n",
info3->gids[i].g_rid));
SAFE_FREE(lgroupSIDs);
free_server_info(server_info);
return nt_status;
}
}
/* 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++)
sid_copy(&all_group_SIDs[
n_lgroupSIDs + info3->num_groups2 + i],
&info3->other_sids[i].sid);
/* Where are the 'global' sids... */
/* can the user be guest? if yes, where is it stored? */
if (!NT_STATUS_IS_OK(
nt_status = create_nt_user_token(
&user_sid, &group_sid,
n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
all_group_SIDs, False, &token))) {
DEBUG(4,("create_nt_user_token failed\n"));
SAFE_FREE(all_group_SIDs);
free_server_info(server_info);
return nt_status;
}
(*server_info)->ptok = token;
SAFE_FREE(all_group_SIDs);
memcpy((*server_info)->session_key, info3->user_sess_key, sizeof((*server_info)->session_key)/* 16 */);
memcpy((*server_info)->first_8_lm_hash, info3->padding, 8);
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.str) {
DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
}
SAFE_FREE((*user_info)->smb_name.str);
SAFE_FREE((*user_info)->internal_username.str);
SAFE_FREE((*user_info)->client_domain.str);
SAFE_FREE((*user_info)->domain.str);
SAFE_FREE((*user_info)->wksta_name.str);
data_blob_free(&(*user_info)->lm_resp);
data_blob_free(&(*user_info)->nt_resp);
SAFE_FREE((*user_info)->interactive_password);
data_blob_clear_free(&(*user_info)->plaintext_password);
ZERO_STRUCT(**user_info);
}
SAFE_FREE(*user_info);
}
/***************************************************************************
Clear out a server_info struct that has been allocated
***************************************************************************/
void free_server_info(auth_serversupplied_info **server_info)
{
DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
if (*server_info != NULL) {
pdb_free_sam(&(*server_info)->sam_account);
/* call pam_end here, unless we know we are keeping it */
delete_nt_token( &(*server_info)->ptok );
SAFE_FREE((*server_info)->groups);
SAFE_FREE((*server_info)->unix_name);
ZERO_STRUCT(**server_info);
}
SAFE_FREE(*server_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(auth_context->mem_ctx, sizeof(**auth_method));
if (!*auth_method) {
DEBUG(0,("make_auth_method: malloc failed!\n"));
return False;
}
ZERO_STRUCTP(*auth_method);
return True;
}
/****************************************************************************
Delete a SID token.
****************************************************************************/
void delete_nt_token(NT_USER_TOKEN **pptoken)
{
if (*pptoken) {
NT_USER_TOKEN *ptoken = *pptoken;
SAFE_FREE( ptoken->user_sids );
ZERO_STRUCTP(ptoken);
}
SAFE_FREE(*pptoken);
}
/****************************************************************************
Duplicate a SID token.
****************************************************************************/
NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
{
NT_USER_TOKEN *token;
if (!ptoken)
return NULL;
if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
return NULL;
ZERO_STRUCTP(token);
if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
SAFE_FREE(token);
return NULL;
}
token->num_sids = ptoken->num_sids;
return token;
}
/**
* Squash an NT_STATUS in line with security requirements.
* In an attempt to avoid giving the whole game away when users
* are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
* NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
* (session setups in particular).
*
* @param nt_status NTSTATUS input for squashing.
* @return the 'squashed' nt_status
**/
NTSTATUS nt_status_squash(NTSTATUS nt_status)
{
if NT_STATUS_IS_OK(nt_status) {
return nt_status;
} else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
/* Match WinXP and don't give the game away */
return NT_STATUS_LOGON_FAILURE;
} else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
/* Match WinXP and don't give the game away */
return NT_STATUS_LOGON_FAILURE;
} else {
return nt_status;
}
}
/**
* 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;
char *pass = NULL;
time_t lct;
BOOL ret;
/* if we are a DC, then check for a direct trust relationships */
if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
become_root();
ret = secrets_fetch_trusted_domain_password(dom_name, &pass, &trustdom_sid, &lct);
unbecome_root();
SAFE_FREE(pass);
if (ret)
return True;
}
else {
/* if winbindd is not up and we are a domain member) then we need to update the
trustdom_cache ourselves */
if ( !winbind_ping() )
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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