NTSTATUS rpccli_setup_netlogon_creds_locked(
struct cli_state *cli,
enum dcerpc_transport_t transport,
struct netlogon_creds_cli_context *creds_ctx,
bool force_reauth,
struct cli_credentials *cli_creds,
uint32_t *negotiate_flags)
{
TALLOC_CTX *frame = talloc_stackframe();
struct rpc_pipe_client *netlogon_pipe = NULL;
struct netlogon_creds_CredentialState *creds = NULL;
uint8_t num_nt_hashes = 0;
const struct samr_Password *nt_hashes[2] = { NULL, NULL };
uint8_t idx_nt_hashes = 0;
NTSTATUS status;
status = netlogon_creds_cli_get(creds_ctx, frame, &creds);
if (NT_STATUS_IS_OK(status)) {
const char *action = "using";
if (force_reauth) {
action = "overwrite";
}
DEBUG(5,("%s: %s cached netlogon_creds cli[%s/%s] to %s\n",
__FUNCTION__, action,
creds->account_name, creds->computer_name,
smbXcli_conn_remote_name(cli->conn)));
if (!force_reauth) {
goto done;
}
TALLOC_FREE(creds);
}
nt_hashes[0] = cli_credentials_get_nt_hash(cli_creds, talloc_tos());
if (nt_hashes[0] == NULL) {
TALLOC_FREE(frame);
return NT_STATUS_NO_MEMORY;
}
num_nt_hashes = 1;
nt_hashes[1] = cli_credentials_get_old_nt_hash(cli_creds,
talloc_tos());
if (nt_hashes[1] != NULL) {
num_nt_hashes = 2;
}
status = cli_rpc_pipe_open_noauth_transport(cli,
transport,
&ndr_table_netlogon,
&netlogon_pipe);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5,("%s: failed to open noauth netlogon connection to %s - %s\n",
__FUNCTION__,
smbXcli_conn_remote_name(cli->conn),
nt_errstr(status)));
TALLOC_FREE(frame);
return status;
}
talloc_steal(frame, netlogon_pipe);
status = netlogon_creds_cli_auth(creds_ctx,
netlogon_pipe->binding_handle,
num_nt_hashes,
nt_hashes,
&idx_nt_hashes);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(frame);
return status;
}
status = netlogon_creds_cli_get(creds_ctx, frame, &creds);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(frame);
return NT_STATUS_INTERNAL_ERROR;
}
DEBUG(5,("%s: using new netlogon_creds cli[%s/%s] to %s\n",
__FUNCTION__,
creds->account_name, creds->computer_name,
smbXcli_conn_remote_name(cli->conn)));
done:
if (negotiate_flags != NULL) {
*negotiate_flags = creds->negotiate_flags;
}
TALLOC_FREE(frame);
return NT_STATUS_OK;
}
NTSTATUS rpccli_connect_netlogon(
struct cli_state *cli,
enum dcerpc_transport_t transport,
struct netlogon_creds_cli_context *creds_ctx,
bool force_reauth,
struct cli_credentials *trust_creds,
struct rpc_pipe_client **_rpccli)
{
TALLOC_CTX *frame = talloc_stackframe();
struct netlogon_creds_CredentialState *creds = NULL;
enum netlogon_creds_cli_lck_type lck_type;
enum netr_SchannelType sec_chan_type;
struct netlogon_creds_cli_lck *lck = NULL;
uint32_t negotiate_flags;
uint8_t found_session_key[16] = {0};
bool found_existing_creds = false;
bool do_serverauth;
struct rpc_pipe_client *rpccli;
NTSTATUS status;
bool retry = false;
sec_chan_type = cli_credentials_get_secure_channel_type(trust_creds);
if (sec_chan_type == SEC_CHAN_NULL) {
DBG_ERR("secure_channel_type gave SEC_CHAN_NULL\n");
status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
goto fail;
}
again:
/*
* See whether we can use existing netlogon_creds or
* whether we have to serverauthenticate.
*/
status = netlogon_creds_cli_get(creds_ctx, frame, &creds);
if (NT_STATUS_IS_OK(status)) {
int cmp = memcmp(found_session_key,
creds->session_key,
sizeof(found_session_key));
found_existing_creds = (cmp != 0);
memcpy(found_session_key,
creds->session_key,
sizeof(found_session_key));
TALLOC_FREE(creds);
}
lck_type = (force_reauth || !found_existing_creds) ?
NETLOGON_CREDS_CLI_LCK_EXCLUSIVE :
NETLOGON_CREDS_CLI_LCK_SHARED;
status = netlogon_creds_cli_lck(creds_ctx, lck_type, frame, &lck);
if (!NT_STATUS_IS_OK(status)) {
DBG_DEBUG("netlogon_creds_cli_lck failed: %s\n",
nt_errstr(status));
goto fail;
}
if (!found_existing_creds) {
/*
* Try to find creds under the lock again. Someone
* else might have done it for us.
*/
status = netlogon_creds_cli_get(creds_ctx, frame, &creds);
if (NT_STATUS_IS_OK(status)) {
int cmp = memcmp(found_session_key,
creds->session_key,
sizeof(found_session_key));
found_existing_creds = (cmp != 0);
memcpy(found_session_key, creds->session_key,
sizeof(found_session_key));
TALLOC_FREE(creds);
}
}
do_serverauth = force_reauth || !found_existing_creds;
if (!do_serverauth) {
/*
* Do the quick schannel bind without a reauth
*/
status = cli_rpc_pipe_open_bind_schannel(
cli, &ndr_table_netlogon, transport, creds_ctx,
&rpccli);
if (!retry && NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_ACCESS_DENIED)) {
DBG_DEBUG("Retrying with serverauthenticate\n");
TALLOC_FREE(lck);
retry = true;
goto again;
}
if (!NT_STATUS_IS_OK(status)) {
DBG_DEBUG("cli_rpc_pipe_open_bind_schannel "
"failed: %s\n", nt_errstr(status));
goto fail;
}
goto done;
}
if (cli_credentials_is_anonymous(trust_creds)) {
DBG_WARNING("get_trust_credential for %s only gave anonymous,"
"unable to negotiate NETLOGON credentials\n",
netlogon_creds_cli_debug_string(
creds_ctx, frame));
status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
goto fail;
}
status = rpccli_setup_netlogon_creds_locked(
cli, transport, creds_ctx, true, trust_creds,
&negotiate_flags);
if (!NT_STATUS_IS_OK(status)) {
DBG_DEBUG("rpccli_setup_netlogon_creds failed for %s, "
"unable to setup NETLOGON credentials: %s\n",
netlogon_creds_cli_debug_string(
creds_ctx, frame),
nt_errstr(status));
goto fail;
}
if (!(negotiate_flags & NETLOGON_NEG_AUTHENTICATED_RPC)) {
if (lp_winbind_sealed_pipes() || lp_require_strong_key()) {
status = NT_STATUS_DOWNGRADE_DETECTED;
DBG_WARNING("Unwilling to make connection to %s"
"without connection level security, "
"must set 'winbind sealed pipes = false'"
" and 'require strong key = false' "
"to proceed: %s\n",
netlogon_creds_cli_debug_string(
creds_ctx, frame),
nt_errstr(status));
goto fail;
}
status = cli_rpc_pipe_open_noauth_transport(
cli, transport, &ndr_table_netlogon, &rpccli);
if (!NT_STATUS_IS_OK(status)) {
DBG_DEBUG("cli_rpc_pipe_open_noauth_transport "
"failed: %s\n", nt_errstr(status));
goto fail;
}
goto done;
}
status = cli_rpc_pipe_open_bind_schannel(
cli, &ndr_table_netlogon, transport, creds_ctx, &rpccli);
if (!NT_STATUS_IS_OK(status)) {
DBG_DEBUG("cli_rpc_pipe_open_bind_schannel "
"failed: %s\n", nt_errstr(status));
goto fail;
}
status = netlogon_creds_cli_check(creds_ctx, rpccli->binding_handle,
NULL);
if (!NT_STATUS_IS_OK(status)) {
DBG_WARNING("netlogon_creds_cli_check failed: %s\n",
nt_errstr(status));
goto fail;
}
done:
*_rpccli = rpccli;
status = NT_STATUS_OK;
fail:
ZERO_STRUCT(found_session_key);
TALLOC_FREE(lck);
TALLOC_FREE(frame);
return status;
}
NTSTATUS rpccli_setup_netlogon_creds(struct cli_state *cli,
enum dcerpc_transport_t transport,
struct netlogon_creds_cli_context *netlogon_creds,
bool force_reauth,
struct samr_Password current_nt_hash,
const struct samr_Password *previous_nt_hash)
{
TALLOC_CTX *frame = talloc_stackframe();
struct rpc_pipe_client *netlogon_pipe = NULL;
struct netlogon_creds_CredentialState *creds = NULL;
NTSTATUS status;
status = netlogon_creds_cli_get(netlogon_creds,
frame, &creds);
if (NT_STATUS_IS_OK(status)) {
const char *action = "using";
if (force_reauth) {
action = "overwrite";
}
DEBUG(5,("%s: %s cached netlogon_creds cli[%s/%s] to %s\n",
__FUNCTION__, action,
creds->account_name, creds->computer_name,
smbXcli_conn_remote_name(cli->conn)));
if (!force_reauth) {
TALLOC_FREE(frame);
return NT_STATUS_OK;
}
TALLOC_FREE(creds);
}
status = cli_rpc_pipe_open_noauth_transport(cli,
transport,
&ndr_table_netlogon,
&netlogon_pipe);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5,("%s: failed to open noauth netlogon connection to %s - %s\n",
__FUNCTION__,
smbXcli_conn_remote_name(cli->conn),
nt_errstr(status)));
TALLOC_FREE(frame);
return status;
}
talloc_steal(frame, netlogon_pipe);
status = netlogon_creds_cli_auth(netlogon_creds,
netlogon_pipe->binding_handle,
current_nt_hash,
previous_nt_hash);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(frame);
return status;
}
status = netlogon_creds_cli_get(netlogon_creds,
frame, &creds);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(frame);
return NT_STATUS_INTERNAL_ERROR;
}
DEBUG(5,("%s: using new netlogon_creds cli[%s/%s] to %s\n",
__FUNCTION__,
creds->account_name, creds->computer_name,
smbXcli_conn_remote_name(cli->conn)));
TALLOC_FREE(frame);
return NT_STATUS_OK;
}
