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/*
Unix SMB/CIFS implementation.
Connect to the SAMR pipe, given an smbcli_tree and possibly some
credentials. Try ntlmssp, schannel and anon in that order.
Copyright (C) Volker Lendecke 2005
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"
#include "libcli/composite/composite.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/security/security.h"
#include "librpc/gen_ndr/ndr_samr_c.h"
/* Helper to initialize SAMR with a specific auth methods. Verify by opening
* the SAM handle */
struct connect_samr_state {
struct composite_context *ctx;
uint8_t auth_type;
struct cli_credentials *creds;
struct dom_sid *sid;
struct dcerpc_pipe *samr_pipe;
struct policy_handle *connect_handle;
struct policy_handle *domain_handle;
struct samr_Connect2 c;
struct samr_OpenDomain o;
};
static void connect_samr_recv_pipe(struct composite_context *ctx);
static void connect_samr_recv_anon_bind(struct composite_context *ctx);
static void connect_samr_recv_auth_bind(struct composite_context *ctx);
static void connect_samr_recv_conn(struct rpc_request *req);
static void connect_samr_recv_open(struct rpc_request *req);
struct composite_context *wb_connect_sam_send(TALLOC_CTX *mem_ctx,
struct smbcli_tree *tree,
uint8_t auth_type,
struct cli_credentials *creds,
const struct dom_sid *domain_sid)
{
struct composite_context *result, *ctx;
struct connect_samr_state *state;
result = talloc(mem_ctx, struct composite_context);
if (result == NULL) goto failed;
result->state = COMPOSITE_STATE_IN_PROGRESS;
result->async.fn = NULL;
result->event_ctx = tree->session->transport->socket->event.ctx;
state = talloc(result, struct connect_samr_state);
if (state == NULL) goto failed;
state->ctx = result;
result->private_data = state;
state->auth_type = auth_type;
state->creds = creds;
state->sid = dom_sid_dup(state, domain_sid);
if (state->sid == NULL) goto failed;
state->samr_pipe = dcerpc_pipe_init(state, result->event_ctx);
if (state->samr_pipe == NULL) goto failed;
ctx = dcerpc_pipe_open_smb_send(state->samr_pipe, tree,
"\\samr");
ctx->async.fn = connect_samr_recv_pipe;
ctx->async.private_data = state;
return result;
failed:
talloc_free(result);
return NULL;
}
static void connect_samr_recv_pipe(struct composite_context *ctx)
{
struct connect_samr_state *state =
talloc_get_type(ctx->async.private_data,
struct connect_samr_state);
state->ctx->status = dcerpc_pipe_open_smb_recv(ctx);
if (!composite_is_ok(state->ctx)) return;
switch (state->auth_type) {
case DCERPC_AUTH_TYPE_NONE:
ctx = dcerpc_bind_auth_none_send(state, state->samr_pipe,
&dcerpc_table_samr);
composite_continue(state->ctx, ctx,
connect_samr_recv_anon_bind, state);
break;
case DCERPC_AUTH_TYPE_NTLMSSP:
case DCERPC_AUTH_TYPE_SCHANNEL:
{
uint8_t auth_type;
if (lp_winbind_sealed_pipes()) {
auth_type = DCERPC_AUTH_LEVEL_PRIVACY;
} else {
auth_type = DCERPC_AUTH_LEVEL_INTEGRITY;
}
if (state->creds == NULL) {
composite_error(state->ctx, NT_STATUS_INTERNAL_ERROR);
return;
}
ctx = dcerpc_bind_auth_send(state, state->samr_pipe,
&dcerpc_table_samr,
state->creds, state->auth_type,
auth_type,
NULL);
composite_continue(state->ctx, ctx,
connect_samr_recv_auth_bind, state);
break;
}
default:
composite_error(state->ctx, NT_STATUS_INTERNAL_ERROR);
}
}
static void connect_samr_recv_anon_bind(struct composite_context *ctx)
{
struct connect_samr_state *state =
talloc_get_type(ctx->async.private_data,
struct connect_samr_state);
struct rpc_request *req;
state->ctx->status = dcerpc_bind_auth_none_recv(ctx);
if (!composite_is_ok(state->ctx)) return;
state->connect_handle = talloc(state, struct policy_handle);
if (composite_nomem(state->connect_handle, state->ctx)) return;
state->c.in.system_name =
talloc_asprintf(state, "\\\\%s",
dcerpc_server_name(state->samr_pipe));
state->c.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
state->c.out.connect_handle = state->connect_handle;
req = dcerpc_samr_Connect2_send(state->samr_pipe, state, &state->c);
composite_continue_rpc(state->ctx, req, connect_samr_recv_conn, state);
}
static void connect_samr_recv_auth_bind(struct composite_context *ctx)
{
struct connect_samr_state *state =
talloc_get_type(ctx->async.private_data,
struct connect_samr_state);
struct rpc_request *req;
state->ctx->status = dcerpc_bind_auth_recv(ctx);
if (!composite_is_ok(state->ctx)) return;
state->connect_handle = talloc(state, struct policy_handle);
if (composite_nomem(state->connect_handle, state->ctx)) return;
state->c.in.system_name =
talloc_asprintf(state, "\\\\%s",
dcerpc_server_name(state->samr_pipe));
state->c.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
state->c.out.connect_handle = state->connect_handle;
req = dcerpc_samr_Connect2_send(state->samr_pipe, state, &state->c);
composite_continue_rpc(state->ctx, req, connect_samr_recv_conn, state);
}
static void connect_samr_recv_conn(struct rpc_request *req)
{
struct connect_samr_state *state =
talloc_get_type(req->async.private,
struct connect_samr_state);
state->ctx->status = dcerpc_ndr_request_recv(req);
if (!composite_is_ok(state->ctx)) return;
state->ctx->status = state->c.out.result;
if (!composite_is_ok(state->ctx)) return;
state->domain_handle = talloc(state, struct policy_handle);
if (composite_nomem(state->domain_handle, state->ctx)) return;
state->o.in.connect_handle = state->connect_handle;
state->o.in.access_mask = SEC_FLAG_MAXIMUM_ALLOWED;
state->o.in.sid = state->sid;
state->o.out.domain_handle = state->domain_handle;
req = dcerpc_samr_OpenDomain_send(state->samr_pipe, state, &state->o);
composite_continue_rpc(state->ctx, req,
connect_samr_recv_open, state);
}
static void connect_samr_recv_open(struct rpc_request *req)
{
struct connect_samr_state *state =
talloc_get_type(req->async.private,
struct connect_samr_state);
state->ctx->status = dcerpc_ndr_request_recv(req);
if (!composite_is_ok(state->ctx)) return;
state->ctx->status = state->o.out.result;
if (!composite_is_ok(state->ctx)) return;
composite_done(state->ctx);
}
NTSTATUS wb_connect_sam_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx,
struct dcerpc_pipe **samr_pipe,
struct policy_handle **connect_handle,
struct policy_handle **domain_handle)
{
NTSTATUS status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct connect_samr_state *state =
talloc_get_type(c->private_data,
struct connect_samr_state);
*samr_pipe = talloc_steal(mem_ctx, state->samr_pipe);
*connect_handle = talloc_steal(mem_ctx, state->connect_handle);
*domain_handle = talloc_steal(mem_ctx, state->domain_handle);
}
talloc_free(c);
return status;
}
NTSTATUS wb_connect_sam(TALLOC_CTX *mem_ctx,
struct smbcli_tree *tree,
uint8_t auth_type,
struct cli_credentials *creds,
const struct dom_sid *domain_sid,
struct dcerpc_pipe **samr_pipe,
struct policy_handle **connect_handle,
struct policy_handle **domain_handle)
{
struct composite_context *c =
wb_connect_sam_send(mem_ctx, tree, auth_type, creds,
domain_sid);
return wb_connect_sam_recv(c, mem_ctx, samr_pipe, connect_handle,
domain_handle);
}
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