1
0
mirror of https://github.com/samba-team/samba.git synced 2024-12-23 17:34:34 +03:00
samba-mirror/source3/utils/net_rpc_join.c
2012-08-09 12:08:18 -07:00

582 lines
16 KiB
C

/*
Samba Unix/Linux SMB client library
Distributed SMB/CIFS Server Management Utility
Copyright (C) 2001 Andrew Bartlett (abartlet@samba.org)
Copyright (C) Tim Potter 2001
Copyright (C) 2008 Guenther Deschner
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 3 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, see <http://www.gnu.org/licenses/>. */
#include "includes.h"
#include "utils/net.h"
#include "rpc_client/cli_pipe.h"
#include "../libcli/auth/libcli_auth.h"
#include "../librpc/gen_ndr/ndr_lsa_c.h"
#include "rpc_client/cli_lsarpc.h"
#include "../librpc/gen_ndr/ndr_samr_c.h"
#include "rpc_client/init_samr.h"
#include "../librpc/gen_ndr/ndr_netlogon.h"
#include "rpc_client/cli_netlogon.h"
#include "secrets.h"
#include "rpc_client/init_lsa.h"
#include "libsmb/libsmb.h"
#include "../libcli/smb/smbXcli_base.h"
/* Macro for checking RPC error codes to make things more readable */
#define CHECK_RPC_ERR(rpc, msg) \
if (!NT_STATUS_IS_OK(status = rpc)) { \
DEBUG(0, (msg ": %s\n", nt_errstr(status))); \
goto done; \
}
#define CHECK_DCERPC_ERR(rpc, msg) \
if (!NT_STATUS_IS_OK(status = rpc)) { \
DEBUG(0, (msg ": %s\n", nt_errstr(status))); \
goto done; \
} \
if (!NT_STATUS_IS_OK(result)) { \
status = result; \
DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
goto done; \
}
#define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
if (!NT_STATUS_IS_OK(status = rpc)) { \
DEBUG(0, debug_args); \
goto done; \
}
#define CHECK_DCERPC_ERR_DEBUG(rpc, debug_args) \
if (!NT_STATUS_IS_OK(status = rpc)) { \
DEBUG(0, debug_args); \
goto done; \
} \
if (!NT_STATUS_IS_OK(result)) { \
status = result; \
DEBUG(0, debug_args); \
goto done; \
}
/**
* confirm that a domain join is still valid
*
* @return A shell status integer (0 for success)
*
**/
NTSTATUS net_rpc_join_ok(struct net_context *c, const char *domain,
const char *server,
const struct sockaddr_storage *server_ss)
{
enum security_types sec;
unsigned int conn_flags = NET_FLAGS_PDC;
uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
struct cli_state *cli = NULL;
struct rpc_pipe_client *pipe_hnd = NULL;
struct rpc_pipe_client *netlogon_pipe = NULL;
NTSTATUS ntret = NT_STATUS_UNSUCCESSFUL;
sec = (enum security_types)lp_security();
if (sec == SEC_ADS) {
/* Connect to IPC$ using machine account's credentials. We don't use anonymous
connection here, as it may be denied by server's local policy. */
net_use_machine_account(c);
} else {
/* some servers (e.g. WinNT) don't accept machine-authenticated
smb connections */
conn_flags |= NET_FLAGS_ANONYMOUS;
}
/* Connect to remote machine */
ntret = net_make_ipc_connection_ex(c, domain, server, server_ss,
conn_flags, &cli);
if (!NT_STATUS_IS_OK(ntret)) {
return ntret;
}
/* Setup the creds as though we're going to do schannel... */
ntret = get_schannel_session_key(cli, domain, &neg_flags,
&netlogon_pipe);
/* We return NT_STATUS_INVALID_NETWORK_RESPONSE if the server is refusing
to negotiate schannel, but the creds were set up ok. That'll have to do. */
if (!NT_STATUS_IS_OK(ntret)) {
if (NT_STATUS_EQUAL(ntret, NT_STATUS_INVALID_NETWORK_RESPONSE)) {
cli_shutdown(cli);
return NT_STATUS_OK;
} else {
DEBUG(0,("net_rpc_join_ok: failed to get schannel session "
"key from server %s for domain %s. Error was %s\n",
smbXcli_conn_remote_name(cli->conn), domain, nt_errstr(ntret) ));
cli_shutdown(cli);
return ntret;
}
}
/* Only do the rest of the schannel test if the client is allowed to do this. */
if (!lp_client_schannel()) {
cli_shutdown(cli);
/* We're good... */
return ntret;
}
ntret = cli_rpc_pipe_open_schannel_with_key(
cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
DCERPC_AUTH_LEVEL_PRIVACY,
domain, &netlogon_pipe->dc, &pipe_hnd);
if (!NT_STATUS_IS_OK(ntret)) {
DEBUG(0,("net_rpc_join_ok: failed to open schannel session "
"on netlogon pipe to server %s for domain %s. Error was %s\n",
smbXcli_conn_remote_name(cli->conn), domain, nt_errstr(ntret) ));
/*
* Note: here, we have:
* (pipe_hnd != NULL) if and only if NT_STATUS_IS_OK(ntret)
*/
}
cli_shutdown(cli);
return ntret;
}
/**
* Join a domain using the administrator username and password
*
* @param argc Standard main() style argc
* @param argc Standard main() style argv. Initial components are already
* stripped. Currently not used.
* @return A shell status integer (0 for success)
*
**/
int net_rpc_join_newstyle(struct net_context *c, int argc, const char **argv)
{
/* libsmb variables */
struct cli_state *cli;
TALLOC_CTX *mem_ctx;
uint32 acb_info = ACB_WSTRUST;
uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
enum netr_SchannelType sec_channel_type;
struct rpc_pipe_client *pipe_hnd = NULL;
struct dcerpc_binding_handle *b = NULL;
/* rpc variables */
struct policy_handle lsa_pol, sam_pol, domain_pol, user_pol;
struct dom_sid *domain_sid;
uint32 user_rid;
/* Password stuff */
DATA_BLOB session_key = data_blob_null;
char *clear_trust_password = NULL;
struct samr_CryptPassword crypt_pwd;
uchar md4_trust_password[16];
union samr_UserInfo set_info;
/* Misc */
NTSTATUS status, result;
int retval = 1;
const char *domain = NULL;
char *acct_name;
struct lsa_String lsa_acct_name;
uint32 acct_flags=0;
uint32_t access_granted = 0;
union lsa_PolicyInformation *info = NULL;
struct samr_Ids user_rids;
struct samr_Ids name_types;
/* check what type of join */
if (argc >= 0) {
sec_channel_type = get_sec_channel_type(argv[0]);
} else {
sec_channel_type = get_sec_channel_type(NULL);
}
switch (sec_channel_type) {
case SEC_CHAN_WKSTA:
acb_info = ACB_WSTRUST;
break;
case SEC_CHAN_BDC:
acb_info = ACB_SVRTRUST;
break;
#if 0
case SEC_CHAN_DOMAIN:
acb_info = ACB_DOMTRUST;
break;
#endif
default:
DEBUG(0,("secure channel type %d not yet supported\n",
sec_channel_type));
break;
}
/* Make authenticated connection to remote machine */
status = net_make_ipc_connection(c, NET_FLAGS_PDC, &cli);
if (!NT_STATUS_IS_OK(status)) {
return 1;
}
if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
DEBUG(0, ("Could not initialise talloc context\n"));
goto done;
}
/* Fetch domain sid */
status = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc.syntax_id,
&pipe_hnd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n",
nt_errstr(status) ));
goto done;
}
b = pipe_hnd->binding_handle;
CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, true,
SEC_FLAG_MAXIMUM_ALLOWED,
&lsa_pol),
"error opening lsa policy handle");
CHECK_DCERPC_ERR(dcerpc_lsa_QueryInfoPolicy(b, mem_ctx,
&lsa_pol,
LSA_POLICY_INFO_ACCOUNT_DOMAIN,
&info,
&result),
"error querying info policy");
domain = info->account_domain.name.string;
domain_sid = info->account_domain.sid;
dcerpc_lsa_Close(b, mem_ctx, &lsa_pol, &result);
TALLOC_FREE(pipe_hnd); /* Done with this pipe */
/* Bail out if domain didn't get set. */
if (!domain) {
DEBUG(0, ("Could not get domain name.\n"));
goto done;
}
/* Create domain user */
status = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
&pipe_hnd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n",
nt_errstr(status) ));
goto done;
}
b = pipe_hnd->binding_handle;
status = cli_get_session_key(mem_ctx, pipe_hnd, &session_key);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Error getting session_key of SAM pipe. Error was %s\n",
nt_errstr(status)));
goto done;
}
CHECK_DCERPC_ERR(dcerpc_samr_Connect2(b, mem_ctx,
pipe_hnd->desthost,
SAMR_ACCESS_ENUM_DOMAINS
| SAMR_ACCESS_LOOKUP_DOMAIN,
&sam_pol,
&result),
"could not connect to SAM database");
CHECK_DCERPC_ERR(dcerpc_samr_OpenDomain(b, mem_ctx,
&sam_pol,
SAMR_DOMAIN_ACCESS_LOOKUP_INFO_1
| SAMR_DOMAIN_ACCESS_CREATE_USER
| SAMR_DOMAIN_ACCESS_OPEN_ACCOUNT,
domain_sid,
&domain_pol,
&result),
"could not open domain");
/* Create domain user */
if ((acct_name = talloc_asprintf(mem_ctx, "%s$", lp_netbios_name())) == NULL) {
status = NT_STATUS_NO_MEMORY;
goto done;
}
if (!strlower_m(acct_name)) {
status = NT_STATUS_INVALID_PARAMETER;
goto done;
}
init_lsa_String(&lsa_acct_name, acct_name);
acct_flags = SEC_GENERIC_READ | SEC_GENERIC_WRITE | SEC_GENERIC_EXECUTE |
SEC_STD_WRITE_DAC | SEC_STD_DELETE |
SAMR_USER_ACCESS_SET_PASSWORD |
SAMR_USER_ACCESS_GET_ATTRIBUTES |
SAMR_USER_ACCESS_SET_ATTRIBUTES;
DEBUG(10, ("Creating account with flags: %d\n",acct_flags));
status = dcerpc_samr_CreateUser2(b, mem_ctx,
&domain_pol,
&lsa_acct_name,
acb_info,
acct_flags,
&user_pol,
&access_granted,
&user_rid,
&result);
if (!NT_STATUS_IS_OK(status)) {
goto done;
}
if (!NT_STATUS_IS_OK(result) &&
!NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
status = result;
d_fprintf(stderr,_("Creation of workstation account failed\n"));
/* If NT_STATUS_ACCESS_DENIED then we have a valid
username/password combo but the user does not have
administrator access. */
if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
d_fprintf(stderr, _("User specified does not have "
"administrator privileges\n"));
goto done;
}
/* We *must* do this.... don't ask... */
if (NT_STATUS_IS_OK(result)) {
dcerpc_samr_Close(b, mem_ctx, &user_pol, &result);
}
CHECK_DCERPC_ERR_DEBUG(dcerpc_samr_LookupNames(b, mem_ctx,
&domain_pol,
1,
&lsa_acct_name,
&user_rids,
&name_types,
&result),
("error looking up rid for user %s: %s/%s\n",
acct_name, nt_errstr(status), nt_errstr(result)));
if (name_types.ids[0] != SID_NAME_USER) {
DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types.ids[0]));
goto done;
}
user_rid = user_rids.ids[0];
/* Open handle on user */
CHECK_DCERPC_ERR_DEBUG(
dcerpc_samr_OpenUser(b, mem_ctx,
&domain_pol,
SEC_FLAG_MAXIMUM_ALLOWED,
user_rid,
&user_pol,
&result),
("could not re-open existing user %s: %s/%s\n",
acct_name, nt_errstr(status), nt_errstr(result)));
/* Create a random machine account password */
clear_trust_password = generate_random_str(talloc_tos(), DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
E_md4hash(clear_trust_password, md4_trust_password);
/* Set password on machine account */
init_samr_CryptPassword(clear_trust_password,
&session_key,
&crypt_pwd);
set_info.info24.password = crypt_pwd;
set_info.info24.password_expired = PASS_DONT_CHANGE_AT_NEXT_LOGON;
CHECK_DCERPC_ERR(dcerpc_samr_SetUserInfo2(b, mem_ctx,
&user_pol,
24,
&set_info,
&result),
"error setting trust account password");
/* Why do we have to try to (re-)set the ACB to be the same as what
we passed in the samr_create_dom_user() call? When a NT
workstation is joined to a domain by an administrator the
acb_info is set to 0x80. For a normal user with "Add
workstations to the domain" rights the acb_info is 0x84. I'm
not sure whether it is supposed to make a difference or not. NT
seems to cope with either value so don't bomb out if the set
userinfo2 level 0x10 fails. -tpot */
set_info.info16.acct_flags = acb_info;
/* Ignoring the return value is necessary for joining a domain
as a normal user with "Add workstation to domain" privilege. */
status = dcerpc_samr_SetUserInfo(b, mem_ctx,
&user_pol,
16,
&set_info,
&result);
dcerpc_samr_Close(b, mem_ctx, &user_pol, &result);
TALLOC_FREE(pipe_hnd); /* Done with this pipe */
/* Now check the whole process from top-to-bottom */
status = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
&pipe_hnd);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
nt_errstr(status) ));
goto done;
}
status = rpccli_netlogon_setup_creds(pipe_hnd,
pipe_hnd->desthost, /* server name */
domain, /* domain */
lp_netbios_name(), /* client name */
lp_netbios_name(), /* machine account name */
md4_trust_password,
sec_channel_type,
&neg_flags);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
nt_errstr(status)));
if ( NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
(sec_channel_type == SEC_CHAN_BDC) ) {
d_fprintf(stderr, _("Please make sure that no computer "
"account\nnamed like this machine "
"(%s) exists in the domain\n"),
lp_netbios_name());
}
goto done;
}
/* We can only check the schannel connection if the client is allowed
to do this and the server supports it. If not, just assume success
(after all the rpccli_netlogon_setup_creds() succeeded, and we'll
do the same again (setup creds) in net_rpc_join_ok(). JRA. */
if (lp_client_schannel() && (neg_flags & NETLOGON_NEG_SCHANNEL)) {
struct rpc_pipe_client *netlogon_schannel_pipe;
status = cli_rpc_pipe_open_schannel_with_key(
cli, &ndr_table_netlogon.syntax_id, NCACN_NP,
DCERPC_AUTH_LEVEL_PRIVACY, domain, &pipe_hnd->dc,
&netlogon_schannel_pipe);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
nt_errstr(status)));
if ( NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
(sec_channel_type == SEC_CHAN_BDC) ) {
d_fprintf(stderr, _("Please make sure that no "
"computer account\nnamed "
"like this machine (%s) "
"exists in the domain\n"),
lp_netbios_name());
}
goto done;
}
TALLOC_FREE(netlogon_schannel_pipe);
}
TALLOC_FREE(pipe_hnd);
/* Now store the secret in the secrets database */
if (!strupper_m(discard_const_p(char, domain))) {
DEBUG(0, ("strupper_m %s failed\n", domain));
goto done;
}
if (!secrets_store_domain_sid(domain, domain_sid)) {
DEBUG(0, ("error storing domain sid for %s\n", domain));
goto done;
}
if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
}
/* double-check, connection from scratch */
status = net_rpc_join_ok(c, domain, smbXcli_conn_remote_name(cli->conn),
smbXcli_conn_remote_sockaddr(cli->conn));
retval = NT_STATUS_IS_OK(status) ? 0 : -1;
done:
/* Display success or failure */
if (domain) {
if (retval != 0) {
fprintf(stderr,_("Unable to join domain %s.\n"),domain);
} else {
printf(_("Joined domain %s.\n"),domain);
}
}
cli_shutdown(cli);
TALLOC_FREE(clear_trust_password);
data_blob_clear_free(&session_key);
return retval;
}
/**
* check that a join is OK
*
* @return A shell status integer (0 for success)
*
**/
int net_rpc_testjoin(struct net_context *c, int argc, const char **argv)
{
NTSTATUS nt_status;
if (c->display_usage) {
d_printf(_("Usage\n"
"net rpc testjoin\n"
" Test if a join is OK\n"));
return 0;
}
/* Display success or failure */
nt_status = net_rpc_join_ok(c, c->opt_target_workgroup, NULL, NULL);
if (!NT_STATUS_IS_OK(nt_status)) {
fprintf(stderr, _("Join to domain '%s' is not valid: %s\n"),
c->opt_target_workgroup, nt_errstr(nt_status));
return -1;
}
printf(_("Join to '%s' is OK\n"), c->opt_target_workgroup);
return 0;
}